diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/auth.rs | 229 | ||||
| -rw-r--r-- | src/config.rs | 49 | ||||
| -rw-r--r-- | src/device.rs | 1367 | ||||
| -rw-r--r-- | src/device/mod.rs | 785 | ||||
| -rw-r--r-- | src/device/pro.rs | 93 | ||||
| -rw-r--r-- | src/device/storage.rs | 886 | ||||
| -rw-r--r-- | src/device/wrapper.rs | 141 | ||||
| -rw-r--r-- | src/error.rs | 274 | ||||
| -rw-r--r-- | src/lib.rs | 481 | ||||
| -rw-r--r-- | src/otp.rs | 159 | ||||
| -rw-r--r-- | src/pws.rs | 165 | ||||
| -rw-r--r-- | src/util.rs | 194 |
12 files changed, 2998 insertions, 1825 deletions
diff --git a/src/auth.rs b/src/auth.rs index 2d61d4b..fe2f7f2 100644 --- a/src/auth.rs +++ b/src/auth.rs @@ -1,22 +1,25 @@ -use std::ops::Deref; +// Copyright (C) 2018-2019 Robin Krahl <robin.krahl@ireas.org> +// SPDX-License-Identifier: MIT + +use std::convert::TryFrom as _; +use std::ffi::CString; +use std::marker; +use std::ops; use std::os::raw::c_char; use std::os::raw::c_int; -use nitrokey_sys; - use crate::config::{Config, RawConfig}; use crate::device::{Device, DeviceWrapper, Pro, Storage}; +use crate::error::Error; use crate::otp::{ConfigureOtp, GenerateOtp, OtpMode, OtpSlotData, RawOtpSlotData}; -use crate::util::{ - generate_password, get_command_result, get_cstring, result_from_string, CommandError, -}; +use crate::util::{generate_password, get_command_result, get_cstring, result_from_string}; static TEMPORARY_PASSWORD_LENGTH: usize = 25; /// Provides methods to authenticate as a user or as an admin using a PIN. The authenticated /// methods will consume the current device instance. On success, they return the authenticated /// device. Otherwise, they return the current unauthenticated device and the error code. -pub trait Authenticate { +pub trait Authenticate<'a> { /// Performs user authentication. This method consumes the device. If successful, an /// authenticated device is returned. Otherwise, the current unauthenticated device and the /// error are returned. @@ -34,20 +37,21 @@ pub trait Authenticate { /// /// ```no_run /// use nitrokey::{Authenticate, DeviceWrapper, User}; - /// # use nitrokey::CommandError; + /// # use nitrokey::Error; /// - /// fn perform_user_task(device: &User<DeviceWrapper>) {} + /// fn perform_user_task<'a>(device: &User<'a, DeviceWrapper<'a>>) {} /// fn perform_other_task(device: &DeviceWrapper) {} /// - /// # fn try_main() -> Result<(), CommandError> { - /// let device = nitrokey::connect()?; + /// # fn try_main() -> Result<(), Error> { + /// let mut manager = nitrokey::take()?; + /// let device = manager.connect()?; /// let device = match device.authenticate_user("123456") { /// Ok(user) => { /// perform_user_task(&user); /// user.device() /// }, /// Err((device, err)) => { - /// println!("Could not authenticate as user: {}", err); + /// eprintln!("Could not authenticate as user: {}", err); /// device /// }, /// }; @@ -56,12 +60,12 @@ pub trait Authenticate { /// # } /// ``` /// - /// [`InvalidString`]: enum.CommandError.html#variant.InvalidString + /// [`InvalidString`]: enum.LibraryError.html#variant.InvalidString /// [`RngError`]: enum.CommandError.html#variant.RngError /// [`WrongPassword`]: enum.CommandError.html#variant.WrongPassword - fn authenticate_user(self, password: &str) -> Result<User<Self>, (Self, CommandError)> + fn authenticate_user(self, password: &str) -> Result<User<'a, Self>, (Self, Error)> where - Self: Device + Sized; + Self: Device<'a> + Sized; /// Performs admin authentication. This method consumes the device. If successful, an /// authenticated device is returned. Otherwise, the current unauthenticated device and the @@ -80,20 +84,21 @@ pub trait Authenticate { /// /// ```no_run /// use nitrokey::{Authenticate, Admin, DeviceWrapper}; - /// # use nitrokey::CommandError; + /// # use nitrokey::Error; /// - /// fn perform_admin_task(device: &Admin<DeviceWrapper>) {} + /// fn perform_admin_task<'a>(device: &Admin<'a, DeviceWrapper<'a>>) {} /// fn perform_other_task(device: &DeviceWrapper) {} /// - /// # fn try_main() -> Result<(), CommandError> { - /// let device = nitrokey::connect()?; + /// # fn try_main() -> Result<(), Error> { + /// let mut manager = nitrokey::take()?; + /// let device = manager.connect()?; /// let device = match device.authenticate_admin("123456") { /// Ok(admin) => { /// perform_admin_task(&admin); /// admin.device() /// }, /// Err((device, err)) => { - /// println!("Could not authenticate as admin: {}", err); + /// eprintln!("Could not authenticate as admin: {}", err); /// device /// }, /// }; @@ -102,16 +107,16 @@ pub trait Authenticate { /// # } /// ``` /// - /// [`InvalidString`]: enum.CommandError.html#variant.InvalidString + /// [`InvalidString`]: enum.LibraryError.html#variant.InvalidString /// [`RngError`]: enum.CommandError.html#variant.RngError /// [`WrongPassword`]: enum.CommandError.html#variant.WrongPassword - fn authenticate_admin(self, password: &str) -> Result<Admin<Self>, (Self, CommandError)> + fn authenticate_admin(self, password: &str) -> Result<Admin<'a, Self>, (Self, Error)> where - Self: Device + Sized; + Self: Device<'a> + Sized; } trait AuthenticatedDevice<T> { - fn new(device: T, temp_password: Vec<u8>) -> Self; + fn new(device: T, temp_password: CString) -> Self; } /// A Nitrokey device with user authentication. @@ -124,9 +129,10 @@ trait AuthenticatedDevice<T> { /// [`authenticate_admin`]: trait.Authenticate.html#method.authenticate_admin /// [`device`]: #method.device #[derive(Debug)] -pub struct User<T: Device> { +pub struct User<'a, T: Device<'a>> { device: T, - temp_password: Vec<u8>, + temp_password: CString, + marker: marker::PhantomData<&'a T>, } /// A Nitrokey device with admin authentication. @@ -139,14 +145,15 @@ pub struct User<T: Device> { /// [`authenticate_admin`]: trait.Authenticate.html#method.authenticate_admin /// [`device`]: #method.device #[derive(Debug)] -pub struct Admin<T: Device> { +pub struct Admin<'a, T: Device<'a>> { device: T, - temp_password: Vec<u8>, + temp_password: CString, + marker: marker::PhantomData<&'a T>, } -fn authenticate<D, A, T>(device: D, password: &str, callback: T) -> Result<A, (D, CommandError)> +fn authenticate<'a, D, A, T>(device: D, password: &str, callback: T) -> Result<A, (D, Error)> where - D: Device, + D: Device<'a>, A: AuthenticatedDevice<D>, T: Fn(*const c_char, *const c_char) -> c_int, { @@ -159,21 +166,21 @@ where Err(err) => return Err((device, err)), }; let password_ptr = password.as_ptr(); - let temp_password_ptr = temp_password.as_ptr() as *const c_char; - return match callback(password_ptr, temp_password_ptr) { + let temp_password_ptr = temp_password.as_ptr(); + match callback(password_ptr, temp_password_ptr) { 0 => Ok(A::new(device, temp_password)), - rv => Err((device, CommandError::from(rv))), - }; + rv => Err((device, Error::from(rv))), + } } -fn authenticate_user_wrapper<T, C>( +fn authenticate_user_wrapper<'a, T, C>( device: T, constructor: C, password: &str, -) -> Result<User<DeviceWrapper>, (DeviceWrapper, CommandError)> +) -> Result<User<'a, DeviceWrapper<'a>>, (DeviceWrapper<'a>, Error)> where - T: Device, - C: Fn(T) -> DeviceWrapper, + T: Device<'a> + 'a, + C: Fn(T) -> DeviceWrapper<'a>, { let result = device.authenticate_user(password); match result { @@ -182,14 +189,14 @@ where } } -fn authenticate_admin_wrapper<T, C>( +fn authenticate_admin_wrapper<'a, T, C>( device: T, constructor: C, password: &str, -) -> Result<Admin<DeviceWrapper>, (DeviceWrapper, CommandError)> +) -> Result<Admin<'a, DeviceWrapper<'a>>, (DeviceWrapper<'a>, Error)> where - T: Device, - C: Fn(T) -> DeviceWrapper, + T: Device<'a> + 'a, + C: Fn(T) -> DeviceWrapper<'a>, { let result = device.authenticate_admin(password); match result { @@ -198,7 +205,7 @@ where } } -impl<T: Device> User<T> { +impl<'a, T: Device<'a>> User<'a, T> { /// Forgets the user authentication and returns an unauthenticated device. This method /// consumes the authenticated device. It does not perform any actual commands on the /// Nitrokey. @@ -207,7 +214,7 @@ impl<T: Device> User<T> { } } -impl<T: Device> Deref for User<T> { +impl<'a, T: Device<'a>> ops::Deref for User<'a, T> { type Target = T; fn deref(&self) -> &Self::Target { @@ -215,38 +222,37 @@ impl<T: Device> Deref for User<T> { } } -impl<T: Device> GenerateOtp for User<T> { - fn get_hotp_code(&self, slot: u8) -> Result<String, CommandError> { - unsafe { - let temp_password_ptr = self.temp_password.as_ptr() as *const c_char; - return result_from_string(nitrokey_sys::NK_get_hotp_code_PIN(slot, temp_password_ptr)); - } +impl<'a, T: Device<'a>> ops::DerefMut for User<'a, T> { + fn deref_mut(&mut self) -> &mut T { + &mut self.device } +} - fn get_totp_code(&self, slot: u8) -> Result<String, CommandError> { - unsafe { - let temp_password_ptr = self.temp_password.as_ptr() as *const c_char; - return result_from_string(nitrokey_sys::NK_get_totp_code_PIN( - slot, - 0, - 0, - 0, - temp_password_ptr, - )); - } +impl<'a, T: Device<'a>> GenerateOtp for User<'a, T> { + fn get_hotp_code(&mut self, slot: u8) -> Result<String, Error> { + result_from_string(unsafe { + nitrokey_sys::NK_get_hotp_code_PIN(slot, self.temp_password.as_ptr()) + }) + } + + fn get_totp_code(&self, slot: u8) -> Result<String, Error> { + result_from_string(unsafe { + nitrokey_sys::NK_get_totp_code_PIN(slot, 0, 0, 0, self.temp_password.as_ptr()) + }) } } -impl<T: Device> AuthenticatedDevice<T> for User<T> { - fn new(device: T, temp_password: Vec<u8>) -> Self { +impl<'a, T: Device<'a>> AuthenticatedDevice<T> for User<'a, T> { + fn new(device: T, temp_password: CString) -> Self { User { device, temp_password, + marker: marker::PhantomData, } } } -impl<T: Device> Deref for Admin<T> { +impl<'a, T: Device<'a>> ops::Deref for Admin<'a, T> { type Target = T; fn deref(&self) -> &Self::Target { @@ -254,7 +260,13 @@ impl<T: Device> Deref for Admin<T> { } } -impl<T: Device> Admin<T> { +impl<'a, T: Device<'a>> ops::DerefMut for Admin<'a, T> { + fn deref_mut(&mut self) -> &mut T { + &mut self.device + } +} + +impl<'a, T: Device<'a>> Admin<'a, T> { /// Forgets the user authentication and returns an unauthenticated device. This method /// consumes the authenticated device. It does not perform any actual commands on the /// Nitrokey. @@ -272,50 +284,43 @@ impl<T: Device> Admin<T> { /// /// ```no_run /// use nitrokey::{Authenticate, Config}; - /// # use nitrokey::CommandError; + /// # use nitrokey::Error; /// - /// # fn try_main() -> Result<(), CommandError> { - /// let device = nitrokey::connect()?; + /// # fn try_main() -> Result<(), Error> { + /// let mut manager = nitrokey::take()?; + /// let device = manager.connect()?; /// let config = Config::new(None, None, None, false); /// match device.authenticate_admin("12345678") { - /// Ok(admin) => { + /// Ok(mut admin) => { /// admin.write_config(config); /// () /// }, - /// Err((_, err)) => println!("Could not authenticate as admin: {}", err), + /// Err((_, err)) => eprintln!("Could not authenticate as admin: {}", err), /// }; /// # Ok(()) /// # } /// ``` /// - /// [`InvalidSlot`]: enum.CommandError.html#variant.InvalidSlot - pub fn write_config(&self, config: Config) -> Result<(), CommandError> { + /// [`InvalidSlot`]: enum.LibraryError.html#variant.InvalidSlot + pub fn write_config(&mut self, config: Config) -> Result<(), Error> { let raw_config = RawConfig::try_from(config)?; - unsafe { - get_command_result(nitrokey_sys::NK_write_config( + get_command_result(unsafe { + nitrokey_sys::NK_write_config( raw_config.numlock, raw_config.capslock, raw_config.scrollock, raw_config.user_password, false, - self.temp_password.as_ptr() as *const c_char, - )) - } - } - - fn write_otp_slot<C>(&self, data: OtpSlotData, callback: C) -> Result<(), CommandError> - where - C: Fn(RawOtpSlotData, *const c_char) -> c_int, - { - let raw_data = RawOtpSlotData::new(data)?; - let temp_password_ptr = self.temp_password.as_ptr() as *const c_char; - get_command_result(callback(raw_data, temp_password_ptr)) + self.temp_password.as_ptr(), + ) + }) } } -impl<T: Device> ConfigureOtp for Admin<T> { - fn write_hotp_slot(&self, data: OtpSlotData, counter: u64) -> Result<(), CommandError> { - self.write_otp_slot(data, |raw_data: RawOtpSlotData, temp_password_ptr| unsafe { +impl<'a, T: Device<'a>> ConfigureOtp for Admin<'a, T> { + fn write_hotp_slot(&mut self, data: OtpSlotData, counter: u64) -> Result<(), Error> { + let raw_data = RawOtpSlotData::new(data)?; + get_command_result(unsafe { nitrokey_sys::NK_write_hotp_slot( raw_data.number, raw_data.name.as_ptr(), @@ -325,13 +330,14 @@ impl<T: Device> ConfigureOtp for Admin<T> { raw_data.use_enter, raw_data.use_token_id, raw_data.token_id.as_ptr(), - temp_password_ptr, + self.temp_password.as_ptr(), ) }) } - fn write_totp_slot(&self, data: OtpSlotData, time_window: u16) -> Result<(), CommandError> { - self.write_otp_slot(data, |raw_data: RawOtpSlotData, temp_password_ptr| unsafe { + fn write_totp_slot(&mut self, data: OtpSlotData, time_window: u16) -> Result<(), Error> { + let raw_data = RawOtpSlotData::new(data)?; + get_command_result(unsafe { nitrokey_sys::NK_write_totp_slot( raw_data.number, raw_data.name.as_ptr(), @@ -341,33 +347,36 @@ impl<T: Device> ConfigureOtp for Admin<T> { raw_data.use_enter, raw_data.use_token_id, raw_data.token_id.as_ptr(), - temp_password_ptr, + self.temp_password.as_ptr(), ) }) } - fn erase_hotp_slot(&self, slot: u8) -> Result<(), CommandError> { - let temp_password_ptr = self.temp_password.as_ptr() as *const c_char; - unsafe { get_command_result(nitrokey_sys::NK_erase_hotp_slot(slot, temp_password_ptr)) } + fn erase_hotp_slot(&mut self, slot: u8) -> Result<(), Error> { + get_command_result(unsafe { + nitrokey_sys::NK_erase_hotp_slot(slot, self.temp_password.as_ptr()) + }) } - fn erase_totp_slot(&self, slot: u8) -> Result<(), CommandError> { - let temp_password_ptr = self.temp_password.as_ptr() as *const c_char; - unsafe { get_command_result(nitrokey_sys::NK_erase_totp_slot(slot, temp_password_ptr)) } + fn erase_totp_slot(&mut self, slot: u8) -> Result<(), Error> { + get_command_result(unsafe { + nitrokey_sys::NK_erase_totp_slot(slot, self.temp_password.as_ptr()) + }) } } -impl<T: Device> AuthenticatedDevice<T> for Admin<T> { - fn new(device: T, temp_password: Vec<u8>) -> Self { +impl<'a, T: Device<'a>> AuthenticatedDevice<T> for Admin<'a, T> { + fn new(device: T, temp_password: CString) -> Self { Admin { device, temp_password, + marker: marker::PhantomData, } } } -impl Authenticate for DeviceWrapper { - fn authenticate_user(self, password: &str) -> Result<User<Self>, (Self, CommandError)> { +impl<'a> Authenticate<'a> for DeviceWrapper<'a> { + fn authenticate_user(self, password: &str) -> Result<User<'a, Self>, (Self, Error)> { match self { DeviceWrapper::Storage(storage) => { authenticate_user_wrapper(storage, DeviceWrapper::Storage, password) @@ -376,7 +385,7 @@ impl Authenticate for DeviceWrapper { } } - fn authenticate_admin(self, password: &str) -> Result<Admin<Self>, (Self, CommandError)> { + fn authenticate_admin(self, password: &str) -> Result<Admin<'a, Self>, (Self, Error)> { match self { DeviceWrapper::Storage(storage) => { authenticate_admin_wrapper(storage, DeviceWrapper::Storage, password) @@ -388,28 +397,28 @@ impl Authenticate for DeviceWrapper { } } -impl Authenticate for Pro { - fn authenticate_user(self, password: &str) -> Result<User<Self>, (Self, CommandError)> { +impl<'a> Authenticate<'a> for Pro<'a> { + fn authenticate_user(self, password: &str) -> Result<User<'a, Self>, (Self, Error)> { authenticate(self, password, |password_ptr, temp_password_ptr| unsafe { nitrokey_sys::NK_user_authenticate(password_ptr, temp_password_ptr) }) } - fn authenticate_admin(self, password: &str) -> Result<Admin<Self>, (Self, CommandError)> { + fn authenticate_admin(self, password: &str) -> Result<Admin<'a, Self>, (Self, Error)> { authenticate(self, password, |password_ptr, temp_password_ptr| unsafe { nitrokey_sys::NK_first_authenticate(password_ptr, temp_password_ptr) }) } } -impl Authenticate for Storage { - fn authenticate_user(self, password: &str) -> Result<User<Self>, (Self, CommandError)> { +impl<'a> Authenticate<'a> for Storage<'a> { + fn authenticate_user(self, password: &str) -> Result<User<'a, Self>, (Self, Error)> { authenticate(self, password, |password_ptr, temp_password_ptr| unsafe { nitrokey_sys::NK_user_authenticate(password_ptr, temp_password_ptr) }) } - fn authenticate_admin(self, password: &str) -> Result<Admin<Self>, (Self, CommandError)> { + fn authenticate_admin(self, password: &str) -> Result<Admin<'a, Self>, (Self, Error)> { authenticate(self, password, |password_ptr, temp_password_ptr| unsafe { nitrokey_sys::NK_first_authenticate(password_ptr, temp_password_ptr) }) diff --git a/src/config.rs b/src/config.rs index 2ce6f77..120a51b 100644 --- a/src/config.rs +++ b/src/config.rs @@ -1,4 +1,9 @@ -use crate::util::CommandError; +// Copyright (C) 2018-2019 Robin Krahl <robin.krahl@ireas.org> +// SPDX-License-Identifier: MIT + +use std::convert; + +use crate::error::{Error, LibraryError}; /// The configuration for a Nitrokey. #[derive(Clone, Copy, Debug, PartialEq)] @@ -30,21 +35,21 @@ pub struct RawConfig { fn config_otp_slot_to_option(value: u8) -> Option<u8> { if value < 3 { - return Some(value); + Some(value) + } else { + None } - None } -fn option_to_config_otp_slot(value: Option<u8>) -> Result<u8, CommandError> { - match value { - Some(value) => { - if value < 3 { - Ok(value) - } else { - Err(CommandError::InvalidSlot) - } +fn option_to_config_otp_slot(value: Option<u8>) -> Result<u8, Error> { + if let Some(value) = value { + if value < 3 { + Ok(value) + } else { + Err(LibraryError::InvalidSlot.into()) } - None => Ok(255), + } else { + Ok(255) } } @@ -65,8 +70,10 @@ impl Config { } } -impl RawConfig { - pub fn try_from(config: Config) -> Result<RawConfig, CommandError> { +impl convert::TryFrom<Config> for RawConfig { + type Error = Error; + + fn try_from(config: Config) -> Result<RawConfig, Error> { Ok(RawConfig { numlock: option_to_config_otp_slot(config.numlock)?, capslock: option_to_config_otp_slot(config.capslock)?, @@ -76,13 +83,13 @@ impl RawConfig { } } -impl From<[u8; 5]> for RawConfig { - fn from(data: [u8; 5]) -> Self { - RawConfig { - numlock: data[0], - capslock: data[1], - scrollock: data[2], - user_password: data[3] != 0, +impl From<&nitrokey_sys::NK_status> for RawConfig { + fn from(status: &nitrokey_sys::NK_status) -> Self { + Self { + numlock: status.config_numlock, + capslock: status.config_capslock, + scrollock: status.config_scrolllock, + user_password: status.otp_user_password, } } } diff --git a/src/device.rs b/src/device.rs deleted file mode 100644 index 9813c50..0000000 --- a/src/device.rs +++ /dev/null @@ -1,1367 +0,0 @@ -use std::fmt; - -use libc; -use nitrokey_sys; - -use crate::auth::Authenticate; -use crate::config::{Config, RawConfig}; -use crate::otp::GenerateOtp; -use crate::pws::GetPasswordSafe; -use crate::util::{ - get_command_result, get_cstring, get_last_error, result_from_string, CommandError, -}; - -/// Available Nitrokey models. -#[derive(Clone, Copy, Debug, PartialEq)] -pub enum Model { - /// The Nitrokey Storage. - Storage, - /// The Nitrokey Pro. - Pro, -} - -impl fmt::Display for Model { - fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { - write!( - f, - "{}", - match *self { - Model::Pro => "Pro", - Model::Storage => "Storage", - } - ) - } -} - -/// The access mode of a volume on the Nitrokey Storage. -#[derive(Clone, Copy, Debug, PartialEq)] -pub enum VolumeMode { - /// A read-only volume. - ReadOnly, - /// A read-write volume. - ReadWrite, -} - -impl fmt::Display for VolumeMode { - fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { - match *self { - VolumeMode::ReadOnly => f.write_str("read-only"), - VolumeMode::ReadWrite => f.write_str("read-write"), - } - } -} - -/// A wrapper for a Nitrokey device of unknown type. -/// -/// Use the function [`connect`][] to obtain a wrapped instance. The wrapper implements all traits -/// that are shared between all Nitrokey devices so that the shared functionality can be used -/// without knowing the type of the underlying device. If you want to use functionality that is -/// not available for all devices, you have to extract the device. -/// -/// # Examples -/// -/// Authentication with error handling: -/// -/// ```no_run -/// use nitrokey::{Authenticate, DeviceWrapper, User}; -/// # use nitrokey::CommandError; -/// -/// fn perform_user_task(device: &User<DeviceWrapper>) {} -/// fn perform_other_task(device: &DeviceWrapper) {} -/// -/// # fn try_main() -> Result<(), CommandError> { -/// let device = nitrokey::connect()?; -/// let device = match device.authenticate_user("123456") { -/// Ok(user) => { -/// perform_user_task(&user); -/// user.device() -/// }, -/// Err((device, err)) => { -/// println!("Could not authenticate as user: {}", err); -/// device -/// }, -/// }; -/// perform_other_task(&device); -/// # Ok(()) -/// # } -/// ``` -/// -/// Device-specific commands: -/// -/// ```no_run -/// use nitrokey::{DeviceWrapper, Storage}; -/// # use nitrokey::CommandError; -/// -/// fn perform_common_task(device: &DeviceWrapper) {} -/// fn perform_storage_task(device: &Storage) {} -/// -/// # fn try_main() -> Result<(), CommandError> { -/// let device = nitrokey::connect()?; -/// perform_common_task(&device); -/// match device { -/// DeviceWrapper::Storage(storage) => perform_storage_task(&storage), -/// _ => (), -/// }; -/// # Ok(()) -/// # } -/// ``` -/// -/// [`connect`]: fn.connect.html -#[derive(Debug)] -pub enum DeviceWrapper { - /// A Nitrokey Storage device. - Storage(Storage), - /// A Nitrokey Pro device. - Pro(Pro), -} - -/// A Nitrokey Pro device without user or admin authentication. -/// -/// Use the global function [`connect`][] to obtain an instance wrapper or the method -/// [`connect`][`Pro::connect`] to directly obtain an instance. If you want to execute a command -/// that requires user or admin authentication, use [`authenticate_admin`][] or -/// [`authenticate_user`][]. -/// -/// # Examples -/// -/// Authentication with error handling: -/// -/// ```no_run -/// use nitrokey::{Authenticate, User, Pro}; -/// # use nitrokey::CommandError; -/// -/// fn perform_user_task(device: &User<Pro>) {} -/// fn perform_other_task(device: &Pro) {} -/// -/// # fn try_main() -> Result<(), CommandError> { -/// let device = nitrokey::Pro::connect()?; -/// let device = match device.authenticate_user("123456") { -/// Ok(user) => { -/// perform_user_task(&user); -/// user.device() -/// }, -/// Err((device, err)) => { -/// println!("Could not authenticate as user: {}", err); -/// device -/// }, -/// }; -/// perform_other_task(&device); -/// # Ok(()) -/// # } -/// ``` -/// -/// [`authenticate_admin`]: trait.Authenticate.html#method.authenticate_admin -/// [`authenticate_user`]: trait.Authenticate.html#method.authenticate_user -/// [`connect`]: fn.connect.html -/// [`Pro::connect`]: #method.connect -#[derive(Debug)] -pub struct Pro {} - -/// A Nitrokey Storage device without user or admin authentication. -/// -/// Use the global function [`connect`][] to obtain an instance wrapper or the method -/// [`connect`][`Storage::connect`] to directly obtain an instance. If you want to execute a -/// command that requires user or admin authentication, use [`authenticate_admin`][] or -/// [`authenticate_user`][]. -/// -/// # Examples -/// -/// Authentication with error handling: -/// -/// ```no_run -/// use nitrokey::{Authenticate, User, Storage}; -/// # use nitrokey::CommandError; -/// -/// fn perform_user_task(device: &User<Storage>) {} -/// fn perform_other_task(device: &Storage) {} -/// -/// # fn try_main() -> Result<(), CommandError> { -/// let device = nitrokey::Storage::connect()?; -/// let device = match device.authenticate_user("123456") { -/// Ok(user) => { -/// perform_user_task(&user); -/// user.device() -/// }, -/// Err((device, err)) => { -/// println!("Could not authenticate as user: {}", err); -/// device -/// }, -/// }; -/// perform_other_task(&device); -/// # Ok(()) -/// # } -/// ``` -/// -/// [`authenticate_admin`]: trait.Authenticate.html#method.authenticate_admin -/// [`authenticate_user`]: trait.Authenticate.html#method.authenticate_user -/// [`connect`]: fn.connect.html -/// [`Storage::connect`]: #method.connect -#[derive(Debug)] -pub struct Storage {} - -/// The status of a volume on a Nitrokey Storage device. -#[derive(Debug)] -pub struct VolumeStatus { - /// Indicates whether the volume is read-only. - pub read_only: bool, - /// Indicates whether the volume is active. - pub active: bool, -} - -/// Information about the SD card in a Storage device. -#[derive(Debug)] -pub struct SdCardData { - /// The serial number of the SD card. - pub serial_number: u32, - /// The size of the SD card in GB. - pub size: u8, - /// The year the card was manufactured, e. g. 17 for 2017. - pub manufacturing_year: u8, - /// The month the card was manufactured. - pub manufacturing_month: u8, - /// The OEM ID. - pub oem: u16, - /// The manufacturer ID. - pub manufacturer: u8, -} - -#[derive(Debug)] -/// Production information for a Storage device. -pub struct StorageProductionInfo { - /// The major firmware version, e. g. 0 in v0.40. - pub firmware_version_major: u8, - /// The minor firmware version, e. g. 40 in v0.40. - pub firmware_version_minor: u8, - /// The internal firmware version. - pub firmware_version_internal: u8, - /// The serial number of the CPU. - pub serial_number_cpu: u32, - /// Information about the SD card. - pub sd_card: SdCardData, -} - -/// The status of a Nitrokey Storage device. -#[derive(Debug)] -pub struct StorageStatus { - /// The status of the unencrypted volume. - pub unencrypted_volume: VolumeStatus, - /// The status of the encrypted volume. - pub encrypted_volume: VolumeStatus, - /// The status of the hidden volume. - pub hidden_volume: VolumeStatus, - /// The major firmware version, e. g. 0 in v0.40. - pub firmware_version_major: u8, - /// The minor firmware version, e. g. 40 in v0.40. - pub firmware_version_minor: u8, - /// Indicates whether the firmware is locked. - pub firmware_locked: bool, - /// The serial number of the SD card in the Storage stick. - pub serial_number_sd_card: u32, - /// The serial number of the smart card in the Storage stick. - pub serial_number_smart_card: u32, - /// The number of remaining login attempts for the user PIN. - pub user_retry_count: u8, - /// The number of remaining login attempts for the admin PIN. - pub admin_retry_count: u8, - /// Indicates whether a new SD card was found. - pub new_sd_card_found: bool, - /// Indicates whether the SD card is filled with random characters. - pub filled_with_random: bool, - /// Indicates whether the stick has been initialized by generating - /// the AES keys. - pub stick_initialized: bool, -} - -/// A Nitrokey device. -/// -/// This trait provides the commands that can be executed without authentication and that are -/// present on all supported Nitrokey devices. -pub trait Device: Authenticate + GetPasswordSafe + GenerateOtp { - /// Returns the model of the connected Nitrokey device. - /// - /// # Example - /// - /// ```no_run - /// use nitrokey::Device; - /// # use nitrokey::CommandError; - /// - /// # fn try_main() -> Result<(), CommandError> { - /// let device = nitrokey::connect()?; - /// println!("Connected to a Nitrokey {}", device.get_model()); - /// # Ok(()) - /// # } - fn get_model(&self) -> Model; - - /// Returns the serial number of the Nitrokey device. The serial number is the string - /// representation of a hex number. - /// - /// # Example - /// - /// ```no_run - /// use nitrokey::Device; - /// # use nitrokey::CommandError; - /// - /// # fn try_main() -> Result<(), CommandError> { - /// let device = nitrokey::connect()?; - /// match device.get_serial_number() { - /// Ok(number) => println!("serial no: {}", number), - /// Err(err) => println!("Could not get serial number: {}", err), - /// }; - /// # Ok(()) - /// # } - /// ``` - fn get_serial_number(&self) -> Result<String, CommandError> { - unsafe { result_from_string(nitrokey_sys::NK_device_serial_number()) } - } - - /// Returns the number of remaining authentication attempts for the user. The total number of - /// available attempts is three. - /// - /// # Example - /// - /// ```no_run - /// use nitrokey::Device; - /// # use nitrokey::CommandError; - /// - /// # fn try_main() -> Result<(), CommandError> { - /// let device = nitrokey::connect()?; - /// let count = device.get_user_retry_count(); - /// println!("{} remaining authentication attempts (user)", count); - /// # Ok(()) - /// # } - /// ``` - fn get_user_retry_count(&self) -> u8 { - unsafe { nitrokey_sys::NK_get_user_retry_count() } - } - - /// Returns the number of remaining authentication attempts for the admin. The total number of - /// available attempts is three. - /// - /// # Example - /// - /// ```no_run - /// use nitrokey::Device; - /// # use nitrokey::CommandError; - /// - /// # fn try_main() -> Result<(), CommandError> { - /// let device = nitrokey::connect()?; - /// let count = device.get_admin_retry_count(); - /// println!("{} remaining authentication attempts (admin)", count); - /// # Ok(()) - /// # } - /// ``` - fn get_admin_retry_count(&self) -> u8 { - unsafe { nitrokey_sys::NK_get_admin_retry_count() } - } - - /// Returns the major part of the firmware version (should be zero). - /// - /// # Example - /// - /// ```no_run - /// use nitrokey::Device; - /// # use nitrokey::CommandError; - /// - /// # fn try_main() -> Result<(), CommandError> { - /// let device = nitrokey::connect()?; - /// println!( - /// "Firmware version: {}.{}", - /// device.get_major_firmware_version(), - /// device.get_minor_firmware_version(), - /// ); - /// # Ok(()) - /// # } - /// ``` - fn get_major_firmware_version(&self) -> i32 { - unsafe { nitrokey_sys::NK_get_major_firmware_version() } - } - - /// Returns the minor part of the firmware version (for example 8 for version 0.8). - /// - /// # Example - /// - /// ```no_run - /// use nitrokey::Device; - /// # use nitrokey::CommandError; - /// - /// # fn try_main() -> Result<(), CommandError> { - /// let device = nitrokey::connect()?; - /// println!( - /// "Firmware version: {}.{}", - /// device.get_major_firmware_version(), - /// device.get_minor_firmware_version(), - /// ); - /// # Ok(()) - /// # } - fn get_minor_firmware_version(&self) -> i32 { - unsafe { nitrokey_sys::NK_get_minor_firmware_version() } - } - - /// Returns the current configuration of the Nitrokey device. - /// - /// # Example - /// - /// ```no_run - /// use nitrokey::Device; - /// # use nitrokey::CommandError; - /// - /// # fn try_main() -> Result<(), CommandError> { - /// let device = nitrokey::connect()?; - /// let config = device.get_config()?; - /// println!("numlock binding: {:?}", config.numlock); - /// println!("capslock binding: {:?}", config.capslock); - /// println!("scrollock binding: {:?}", config.scrollock); - /// println!("require password for OTP: {:?}", config.user_password); - /// # Ok(()) - /// # } - /// ``` - fn get_config(&self) -> Result<Config, CommandError> { - unsafe { - let config_ptr = nitrokey_sys::NK_read_config(); - if config_ptr.is_null() { - return Err(get_last_error()); - } - let config_array_ptr = config_ptr as *const [u8; 5]; - let raw_config = RawConfig::from(*config_array_ptr); - libc::free(config_ptr as *mut libc::c_void); - return Ok(raw_config.into()); - } - } - - /// Changes the administrator PIN. - /// - /// # Errors - /// - /// - [`InvalidString`][] if one of the provided passwords contains a null byte - /// - [`WrongPassword`][] if the current admin password is wrong - /// - /// # Example - /// - /// ```no_run - /// use nitrokey::Device; - /// # use nitrokey::CommandError; - /// - /// # fn try_main() -> Result<(), CommandError> { - /// let device = nitrokey::connect()?; - /// match device.change_admin_pin("12345678", "12345679") { - /// Ok(()) => println!("Updated admin PIN."), - /// Err(err) => println!("Failed to update admin PIN: {}", err), - /// }; - /// # Ok(()) - /// # } - /// ``` - /// - /// [`InvalidString`]: enum.CommandError.html#variant.InvalidString - /// [`WrongPassword`]: enum.CommandError.html#variant.WrongPassword - fn change_admin_pin(&self, current: &str, new: &str) -> Result<(), CommandError> { - let current_string = get_cstring(current)?; - let new_string = get_cstring(new)?; - unsafe { - get_command_result(nitrokey_sys::NK_change_admin_PIN( - current_string.as_ptr(), - new_string.as_ptr(), - )) - } - } - - /// Changes the user PIN. - /// - /// # Errors - /// - /// - [`InvalidString`][] if one of the provided passwords contains a null byte - /// - [`WrongPassword`][] if the current user password is wrong - /// - /// # Example - /// - /// ```no_run - /// use nitrokey::Device; - /// # use nitrokey::CommandError; - /// - /// # fn try_main() -> Result<(), CommandError> { - /// let device = nitrokey::connect()?; - /// match device.change_user_pin("123456", "123457") { - /// Ok(()) => println!("Updated admin PIN."), - /// Err(err) => println!("Failed to update admin PIN: {}", err), - /// }; - /// # Ok(()) - /// # } - /// ``` - /// - /// [`InvalidString`]: enum.CommandError.html#variant.InvalidString - /// [`WrongPassword`]: enum.CommandError.html#variant.WrongPassword - fn change_user_pin(&self, current: &str, new: &str) -> Result<(), CommandError> { - let current_string = get_cstring(current)?; - let new_string = get_cstring(new)?; - unsafe { - get_command_result(nitrokey_sys::NK_change_user_PIN( - current_string.as_ptr(), - new_string.as_ptr(), - )) - } - } - - /// Unlocks the user PIN after three failed login attempts and sets it to the given value. - /// - /// # Errors - /// - /// - [`InvalidString`][] if one of the provided passwords contains a null byte - /// - [`WrongPassword`][] if the admin password is wrong - /// - /// # Example - /// - /// ```no_run - /// use nitrokey::Device; - /// # use nitrokey::CommandError; - /// - /// # fn try_main() -> Result<(), CommandError> { - /// let device = nitrokey::connect()?; - /// match device.unlock_user_pin("12345678", "123456") { - /// Ok(()) => println!("Unlocked user PIN."), - /// Err(err) => println!("Failed to unlock user PIN: {}", err), - /// }; - /// # Ok(()) - /// # } - /// ``` - /// - /// [`InvalidString`]: enum.CommandError.html#variant.InvalidString - /// [`WrongPassword`]: enum.CommandError.html#variant.WrongPassword - fn unlock_user_pin(&self, admin_pin: &str, user_pin: &str) -> Result<(), CommandError> { - let admin_pin_string = get_cstring(admin_pin)?; - let user_pin_string = get_cstring(user_pin)?; - unsafe { - get_command_result(nitrokey_sys::NK_unlock_user_password( - admin_pin_string.as_ptr(), - user_pin_string.as_ptr(), - )) - } - } - - /// Locks the Nitrokey device. - /// - /// This disables the password store if it has been unlocked. On the Nitrokey Storage, this - /// also disables the volumes if they have been enabled. - /// - /// # Example - /// - /// ```no_run - /// use nitrokey::Device; - /// # use nitrokey::CommandError; - /// - /// # fn try_main() -> Result<(), CommandError> { - /// let device = nitrokey::connect()?; - /// match device.lock() { - /// Ok(()) => println!("Locked the Nitrokey device."), - /// Err(err) => println!("Could not lock the Nitrokey device: {}", err), - /// }; - /// # Ok(()) - /// # } - /// ``` - fn lock(&self) -> Result<(), CommandError> { - unsafe { get_command_result(nitrokey_sys::NK_lock_device()) } - } - - /// Performs a factory reset on the Nitrokey device. - /// - /// This commands performs a factory reset on the smart card (like the factory reset via `gpg - /// --card-edit`) and then clears the flash memory (password safe, one-time passwords etc.). - /// After a factory reset, [`build_aes_key`][] has to be called before the password safe or the - /// encrypted volume can be used. - /// - /// # Errors - /// - /// - [`InvalidString`][] if the provided password contains a null byte - /// - [`WrongPassword`][] if the admin password is wrong - /// - /// # Example - /// - /// ```no_run - /// use nitrokey::Device; - /// # use nitrokey::CommandError; - /// - /// # fn try_main() -> Result<(), CommandError> { - /// let device = nitrokey::connect()?; - /// match device.factory_reset("12345678") { - /// Ok(()) => println!("Performed a factory reset."), - /// Err(err) => println!("Could not perform a factory reset: {}", err), - /// }; - /// # Ok(()) - /// # } - /// ``` - /// - /// [`build_aes_key`]: #method.build_aes_key - fn factory_reset(&self, admin_pin: &str) -> Result<(), CommandError> { - let admin_pin_string = get_cstring(admin_pin)?; - unsafe { get_command_result(nitrokey_sys::NK_factory_reset(admin_pin_string.as_ptr())) } - } - - /// Builds a new AES key on the Nitrokey. - /// - /// The AES key is used to encrypt the password safe and the encrypted volume. You may need - /// to call this method after a factory reset, either using [`factory_reset`][] or using `gpg - /// --card-edit`. You can also use it to destroy the data stored in the password safe or on - /// the encrypted volume. - /// - /// # Errors - /// - /// - [`InvalidString`][] if the provided password contains a null byte - /// - [`WrongPassword`][] if the admin password is wrong - /// - /// # Example - /// - /// ```no_run - /// use nitrokey::Device; - /// # use nitrokey::CommandError; - /// - /// # fn try_main() -> Result<(), CommandError> { - /// let device = nitrokey::connect()?; - /// match device.build_aes_key("12345678") { - /// Ok(()) => println!("New AES keys have been built."), - /// Err(err) => println!("Could not build new AES keys: {}", err), - /// }; - /// # Ok(()) - /// # } - /// ``` - /// - /// [`factory_reset`]: #method.factory_reset - fn build_aes_key(&self, admin_pin: &str) -> Result<(), CommandError> { - let admin_pin_string = get_cstring(admin_pin)?; - unsafe { get_command_result(nitrokey_sys::NK_build_aes_key(admin_pin_string.as_ptr())) } - } -} - -/// Connects to a Nitrokey device. This method can be used to connect to any connected device, -/// both a Nitrokey Pro and a Nitrokey Storage. -/// -/// # Errors -/// -/// - [`Undefined`][] if no Nitrokey device is connected -/// -/// # Example -/// -/// ``` -/// use nitrokey::DeviceWrapper; -/// -/// fn do_something(device: DeviceWrapper) {} -/// -/// match nitrokey::connect() { -/// Ok(device) => do_something(device), -/// Err(err) => println!("Could not connect to a Nitrokey: {}", err), -/// } -/// ``` -/// -/// [`Undefined`]: enum.CommandError.html#variant.Undefined -pub fn connect() -> Result<DeviceWrapper, CommandError> { - unsafe { - match nitrokey_sys::NK_login_auto() { - 1 => match get_connected_device() { - Some(wrapper) => Ok(wrapper), - None => Err(CommandError::Undefined), - }, - _ => Err(CommandError::Undefined), - } - } -} - -/// Connects to a Nitrokey device of the given model. -/// -/// # Errors -/// -/// - [`Undefined`][] if no Nitrokey device of the given model is connected -/// -/// # Example -/// -/// ``` -/// use nitrokey::DeviceWrapper; -/// use nitrokey::Model; -/// -/// fn do_something(device: DeviceWrapper) {} -/// -/// match nitrokey::connect_model(Model::Pro) { -/// Ok(device) => do_something(device), -/// Err(err) => println!("Could not connect to a Nitrokey Pro: {}", err), -/// } -/// ``` -/// -/// [`Undefined`]: enum.CommandError.html#variant.Undefined -pub fn connect_model(model: Model) -> Result<DeviceWrapper, CommandError> { - if connect_enum(model) { - Ok(create_device_wrapper(model)) - } else { - Err(CommandError::Undefined) - } -} - -fn get_connected_model() -> Option<Model> { - unsafe { - match nitrokey_sys::NK_get_device_model() { - nitrokey_sys::NK_device_model_NK_PRO => Some(Model::Pro), - nitrokey_sys::NK_device_model_NK_STORAGE => Some(Model::Storage), - _ => None, - } - } -} - -fn create_device_wrapper(model: Model) -> DeviceWrapper { - match model { - Model::Pro => DeviceWrapper::Pro(Pro {}), - Model::Storage => DeviceWrapper::Storage(Storage {}), - } -} - -fn get_connected_device() -> Option<DeviceWrapper> { - get_connected_model().map(create_device_wrapper) -} - -fn connect_enum(model: Model) -> bool { - let model = match model { - Model::Storage => nitrokey_sys::NK_device_model_NK_STORAGE, - Model::Pro => nitrokey_sys::NK_device_model_NK_PRO, - }; - unsafe { nitrokey_sys::NK_login_enum(model) == 1 } -} - -impl DeviceWrapper { - fn device(&self) -> &dyn Device { - match *self { - DeviceWrapper::Storage(ref storage) => storage, - DeviceWrapper::Pro(ref pro) => pro, - } - } -} - -impl GenerateOtp for DeviceWrapper { - fn get_hotp_slot_name(&self, slot: u8) -> Result<String, CommandError> { - self.device().get_hotp_slot_name(slot) - } - - fn get_totp_slot_name(&self, slot: u8) -> Result<String, CommandError> { - self.device().get_totp_slot_name(slot) - } - - fn get_hotp_code(&self, slot: u8) -> Result<String, CommandError> { - self.device().get_hotp_code(slot) - } - - fn get_totp_code(&self, slot: u8) -> Result<String, CommandError> { - self.device().get_totp_code(slot) - } -} - -impl Device for DeviceWrapper { - fn get_model(&self) -> Model { - match *self { - DeviceWrapper::Pro(_) => Model::Pro, - DeviceWrapper::Storage(_) => Model::Storage, - } - } -} - -impl Pro { - /// Connects to a Nitrokey Pro. - /// - /// # Errors - /// - /// - [`Undefined`][] if no Nitrokey device of the given model is connected - /// - /// # Example - /// - /// ``` - /// use nitrokey::Pro; - /// - /// fn use_pro(device: Pro) {} - /// - /// match nitrokey::Pro::connect() { - /// Ok(device) => use_pro(device), - /// Err(err) => println!("Could not connect to the Nitrokey Pro: {}", err), - /// } - /// ``` - /// - /// [`Undefined`]: enum.CommandError.html#variant.Undefined - pub fn connect() -> Result<Pro, CommandError> { - // TODO: maybe Option instead of Result? - match connect_enum(Model::Pro) { - true => Ok(Pro {}), - false => Err(CommandError::Undefined), - } - } -} - -impl Drop for Pro { - fn drop(&mut self) { - unsafe { - nitrokey_sys::NK_logout(); - } - } -} - -impl Device for Pro { - fn get_model(&self) -> Model { - Model::Pro - } -} - -impl GenerateOtp for Pro {} - -impl Storage { - /// Connects to a Nitrokey Storage. - /// - /// # Errors - /// - /// - [`Undefined`][] if no Nitrokey device of the given model is connected - /// - /// # Example - /// - /// ``` - /// use nitrokey::Storage; - /// - /// fn use_storage(device: Storage) {} - /// - /// match nitrokey::Storage::connect() { - /// Ok(device) => use_storage(device), - /// Err(err) => println!("Could not connect to the Nitrokey Storage: {}", err), - /// } - /// ``` - /// - /// [`Undefined`]: enum.CommandError.html#variant.Undefined - pub fn connect() -> Result<Storage, CommandError> { - // TODO: maybe Option instead of Result? - match connect_enum(Model::Storage) { - true => Ok(Storage {}), - false => Err(CommandError::Undefined), - } - } - - /// Changes the update PIN. - /// - /// The update PIN is used to enable firmware updates. Unlike the user and the admin PIN, the - /// update PIN is not managed by the OpenPGP smart card but by the Nitrokey firmware. There is - /// no retry counter as with the other PIN types. - /// - /// # Errors - /// - /// - [`InvalidString`][] if one of the provided passwords contains a null byte - /// - [`WrongPassword`][] if the current update password is wrong - /// - /// # Example - /// - /// ```no_run - /// # use nitrokey::CommandError; - /// - /// # fn try_main() -> Result<(), CommandError> { - /// let device = nitrokey::Storage::connect()?; - /// match device.change_update_pin("12345678", "87654321") { - /// Ok(()) => println!("Updated update PIN."), - /// Err(err) => println!("Failed to update update PIN: {}", err), - /// }; - /// # Ok(()) - /// # } - /// ``` - /// - /// [`InvalidString`]: enum.CommandError.html#variant.InvalidString - /// [`WrongPassword`]: enum.CommandError.html#variant.WrongPassword - pub fn change_update_pin(&self, current: &str, new: &str) -> Result<(), CommandError> { - let current_string = get_cstring(current)?; - let new_string = get_cstring(new)?; - unsafe { - get_command_result(nitrokey_sys::NK_change_update_password( - current_string.as_ptr(), - new_string.as_ptr(), - )) - } - } - - /// Enables the firmware update mode. - /// - /// During firmware update mode, the Nitrokey can no longer be accessed using HID commands. - /// To resume normal operation, run `dfu-programmer at32uc3a3256s launch`. In order to enter - /// the firmware update mode, you need the update password that can be changed using the - /// [`change_update_pin`][] method. - /// - /// # Errors - /// - /// - [`InvalidString`][] if one of the provided passwords contains a null byte - /// - [`WrongPassword`][] if the current update password is wrong - /// - /// # Example - /// - /// ```no_run - /// # use nitrokey::CommandError; - /// - /// # fn try_main() -> Result<(), CommandError> { - /// let device = nitrokey::Storage::connect()?; - /// match device.enable_firmware_update("12345678") { - /// Ok(()) => println!("Nitrokey entered update mode."), - /// Err(err) => println!("Could not enter update mode: {}", err), - /// }; - /// # Ok(()) - /// # } - /// ``` - /// - /// [`InvalidString`]: enum.CommandError.html#variant.InvalidString - /// [`WrongPassword`]: enum.CommandError.html#variant.WrongPassword - pub fn enable_firmware_update(&self, update_pin: &str) -> Result<(), CommandError> { - let update_pin_string = get_cstring(update_pin)?; - unsafe { - get_command_result(nitrokey_sys::NK_enable_firmware_update( - update_pin_string.as_ptr(), - )) - } - } - - /// Enables the encrypted storage volume. - /// - /// Once the encrypted volume is enabled, it is presented to the operating system as a block - /// device. The API does not provide any information on the name or path of this block device. - /// - /// # Errors - /// - /// - [`InvalidString`][] if the provided password contains a null byte - /// - [`WrongPassword`][] if the provided user password is wrong - /// - /// # Example - /// - /// ```no_run - /// # use nitrokey::CommandError; - /// - /// # fn try_main() -> Result<(), CommandError> { - /// let device = nitrokey::Storage::connect()?; - /// match device.enable_encrypted_volume("123456") { - /// Ok(()) => println!("Enabled the encrypted volume."), - /// Err(err) => println!("Could not enable the encrypted volume: {}", err), - /// }; - /// # Ok(()) - /// # } - /// ``` - /// - /// [`InvalidString`]: enum.CommandError.html#variant.InvalidString - /// [`WrongPassword`]: enum.CommandError.html#variant.WrongPassword - pub fn enable_encrypted_volume(&self, user_pin: &str) -> Result<(), CommandError> { - let user_pin = get_cstring(user_pin)?; - unsafe { get_command_result(nitrokey_sys::NK_unlock_encrypted_volume(user_pin.as_ptr())) } - } - - /// Disables the encrypted storage volume. - /// - /// Once the volume is disabled, it can be no longer accessed as a block device. If the - /// encrypted volume has not been enabled, this method still returns a success. - /// - /// # Example - /// - /// ```no_run - /// # use nitrokey::CommandError; - /// - /// fn use_volume() {} - /// - /// # fn try_main() -> Result<(), CommandError> { - /// let device = nitrokey::Storage::connect()?; - /// match device.enable_encrypted_volume("123456") { - /// Ok(()) => { - /// println!("Enabled the encrypted volume."); - /// use_volume(); - /// match device.disable_encrypted_volume() { - /// Ok(()) => println!("Disabled the encrypted volume."), - /// Err(err) => { - /// println!("Could not disable the encrypted volume: {}", err); - /// }, - /// }; - /// }, - /// Err(err) => println!("Could not enable the encrypted volume: {}", err), - /// }; - /// # Ok(()) - /// # } - /// ``` - pub fn disable_encrypted_volume(&self) -> Result<(), CommandError> { - unsafe { get_command_result(nitrokey_sys::NK_lock_encrypted_volume()) } - } - - /// Enables a hidden storage volume. - /// - /// This function will only succeed if the encrypted storage ([`enable_encrypted_volume`][]) or - /// another hidden volume has been enabled previously. Once the hidden volume is enabled, it - /// is presented to the operating system as a block device and any previously opened encrypted - /// or hidden volumes are closed. The API does not provide any information on the name or path - /// of this block device. - /// - /// Note that the encrypted and the hidden volumes operate on the same storage area, so using - /// both at the same time might lead to data loss. - /// - /// The hidden volume to unlock is selected based on the provided password. - /// - /// # Errors - /// - /// - [`AesDecryptionFailed`][] if the encrypted storage has not been opened before calling - /// this method or the AES key has not been built - /// - [`InvalidString`][] if the provided password contains a null byte - /// - /// # Example - /// - /// ```no_run - /// # use nitrokey::CommandError; - /// - /// # fn try_main() -> Result<(), CommandError> { - /// let device = nitrokey::Storage::connect()?; - /// device.enable_encrypted_volume("123445")?; - /// match device.enable_hidden_volume("hidden-pw") { - /// Ok(()) => println!("Enabled a hidden volume."), - /// Err(err) => println!("Could not enable the hidden volume: {}", err), - /// }; - /// # Ok(()) - /// # } - /// ``` - /// - /// [`enable_encrypted_volume`]: #method.enable_encrypted_volume - /// [`AesDecryptionFailed`]: enum.CommandError.html#variant.AesDecryptionFailed - /// [`InvalidString`]: enum.CommandError.html#variant.InvalidString - pub fn enable_hidden_volume(&self, volume_password: &str) -> Result<(), CommandError> { - let volume_password = get_cstring(volume_password)?; - unsafe { - get_command_result(nitrokey_sys::NK_unlock_hidden_volume( - volume_password.as_ptr(), - )) - } - } - - /// Disables a hidden storage volume. - /// - /// Once the volume is disabled, it can be no longer accessed as a block device. If no hidden - /// volume has been enabled, this method still returns a success. - /// - /// # Example - /// - /// ```no_run - /// # use nitrokey::CommandError; - /// - /// fn use_volume() {} - /// - /// # fn try_main() -> Result<(), CommandError> { - /// let device = nitrokey::Storage::connect()?; - /// device.enable_encrypted_volume("123445")?; - /// match device.enable_hidden_volume("hidden-pw") { - /// Ok(()) => { - /// println!("Enabled the hidden volume."); - /// use_volume(); - /// match device.disable_hidden_volume() { - /// Ok(()) => println!("Disabled the hidden volume."), - /// Err(err) => { - /// println!("Could not disable the hidden volume: {}", err); - /// }, - /// }; - /// }, - /// Err(err) => println!("Could not enable the hidden volume: {}", err), - /// }; - /// # Ok(()) - /// # } - /// ``` - pub fn disable_hidden_volume(&self) -> Result<(), CommandError> { - unsafe { get_command_result(nitrokey_sys::NK_lock_hidden_volume()) } - } - - /// Creates a hidden volume. - /// - /// The volume is crated in the given slot and in the given range of the available memory, - /// where `start` is the start position as a percentage of the available memory, and `end` is - /// the end position as a percentage of the available memory. The volume will be protected by - /// the given password. - /// - /// Note that the encrypted and the hidden volumes operate on the same storage area, so using - /// both at the same time might lead to data loss. - /// - /// According to the libnitrokey documentation, this function only works if the encrypted - /// storage has been opened. - /// - /// # Errors - /// - /// - [`AesDecryptionFailed`][] if the encrypted storage has not been opened before calling - /// this method or the AES key has not been built - /// - [`InvalidString`][] if the provided password contains a null byte - /// - /// # Example - /// - /// ```no_run - /// # use nitrokey::CommandError; - /// - /// # fn try_main() -> Result<(), CommandError> { - /// let device = nitrokey::Storage::connect()?; - /// device.enable_encrypted_volume("123445")?; - /// device.create_hidden_volume(0, 0, 100, "hidden-pw")?; - /// # Ok(()) - /// # } - /// ``` - /// - /// [`AesDecryptionFailed`]: enum.CommandError.html#variant.AesDecryptionFailed - /// [`InvalidString`]: enum.CommandError.html#variant.InvalidString - pub fn create_hidden_volume( - &self, - slot: u8, - start: u8, - end: u8, - password: &str, - ) -> Result<(), CommandError> { - let password = get_cstring(password)?; - unsafe { - get_command_result(nitrokey_sys::NK_create_hidden_volume( - slot, - start, - end, - password.as_ptr(), - )) - } - } - - /// Sets the access mode of the unencrypted volume. - /// - /// This command will reconnect the unencrypted volume so buffers should be flushed before - /// calling it. Since firmware version v0.51, this command requires the admin PIN. Older - /// firmware versions are not supported. - /// - /// # Errors - /// - /// - [`InvalidString`][] if the provided password contains a null byte - /// - [`WrongPassword`][] if the provided admin password is wrong - /// - /// # Example - /// - /// ```no_run - /// # use nitrokey::CommandError; - /// use nitrokey::VolumeMode; - /// - /// # fn try_main() -> Result<(), CommandError> { - /// let device = nitrokey::Storage::connect()?; - /// match device.set_unencrypted_volume_mode("123456", VolumeMode::ReadWrite) { - /// Ok(()) => println!("Set the unencrypted volume to read-write mode."), - /// Err(err) => println!("Could not set the unencrypted volume to read-write mode: {}", err), - /// }; - /// # Ok(()) - /// # } - /// ``` - /// - /// [`InvalidString`]: enum.CommandError.html#variant.InvalidString - /// [`WrongPassword`]: enum.CommandError.html#variant.WrongPassword - pub fn set_unencrypted_volume_mode( - &self, - admin_pin: &str, - mode: VolumeMode, - ) -> Result<(), CommandError> { - let admin_pin = get_cstring(admin_pin)?; - let result = match mode { - VolumeMode::ReadOnly => unsafe { - nitrokey_sys::NK_set_unencrypted_read_only_admin(admin_pin.as_ptr()) - }, - VolumeMode::ReadWrite => unsafe { - nitrokey_sys::NK_set_unencrypted_read_write_admin(admin_pin.as_ptr()) - }, - }; - get_command_result(result) - } - - /// Returns the status of the connected storage device. - /// - /// # Example - /// - /// ```no_run - /// # use nitrokey::CommandError; - /// - /// fn use_volume() {} - /// - /// # fn try_main() -> Result<(), CommandError> { - /// let device = nitrokey::Storage::connect()?; - /// match device.get_status() { - /// Ok(status) => { - /// println!("SD card ID: {:#x}", status.serial_number_sd_card); - /// }, - /// Err(err) => println!("Could not get Storage status: {}", err), - /// }; - /// # Ok(()) - /// # } - /// ``` - pub fn get_status(&self) -> Result<StorageStatus, CommandError> { - let mut raw_status = nitrokey_sys::NK_storage_status { - unencrypted_volume_read_only: false, - unencrypted_volume_active: false, - encrypted_volume_read_only: false, - encrypted_volume_active: false, - hidden_volume_read_only: false, - hidden_volume_active: false, - firmware_version_major: 0, - firmware_version_minor: 0, - firmware_locked: false, - serial_number_sd_card: 0, - serial_number_smart_card: 0, - user_retry_count: 0, - admin_retry_count: 0, - new_sd_card_found: false, - filled_with_random: false, - stick_initialized: false, - }; - let raw_result = unsafe { nitrokey_sys::NK_get_status_storage(&mut raw_status) }; - let result = get_command_result(raw_result); - result.and(Ok(StorageStatus::from(raw_status))) - } - - /// Returns the production information for the connected storage device. - /// - /// # Example - /// - /// ```no_run - /// # use nitrokey::CommandError; - /// - /// fn use_volume() {} - /// - /// # fn try_main() -> Result<(), CommandError> { - /// let device = nitrokey::Storage::connect()?; - /// match device.get_production_info() { - /// Ok(data) => { - /// println!("SD card ID: {:#x}", data.sd_card.serial_number); - /// println!("SD card size: {} GB", data.sd_card.size); - /// }, - /// Err(err) => println!("Could not get Storage production info: {}", err), - /// }; - /// # Ok(()) - /// # } - /// ``` - pub fn get_production_info(&self) -> Result<StorageProductionInfo, CommandError> { - let mut raw_data = nitrokey_sys::NK_storage_ProductionTest { - FirmwareVersion_au8: [0, 2], - FirmwareVersionInternal_u8: 0, - SD_Card_Size_u8: 0, - CPU_CardID_u32: 0, - SmartCardID_u32: 0, - SD_CardID_u32: 0, - SC_UserPwRetryCount: 0, - SC_AdminPwRetryCount: 0, - SD_Card_ManufacturingYear_u8: 0, - SD_Card_ManufacturingMonth_u8: 0, - SD_Card_OEM_u16: 0, - SD_WriteSpeed_u16: 0, - SD_Card_Manufacturer_u8: 0, - }; - let raw_result = unsafe { nitrokey_sys::NK_get_storage_production_info(&mut raw_data) }; - let result = get_command_result(raw_result); - result.and(Ok(StorageProductionInfo::from(raw_data))) - } - - /// Clears the warning for a new SD card. - /// - /// The Storage status contains a field for a new SD card warning. After a factory reset, the - /// field is set to true. After filling the SD card with random data, it is set to false. - /// This method can be used to set it to false without filling the SD card with random data. - /// - /// # Errors - /// - /// - [`InvalidString`][] if the provided password contains a null byte - /// - [`WrongPassword`][] if the provided admin password is wrong - /// - /// # Example - /// - /// ```no_run - /// # use nitrokey::CommandError; - /// - /// # fn try_main() -> Result<(), CommandError> { - /// let device = nitrokey::Storage::connect()?; - /// match device.clear_new_sd_card_warning("12345678") { - /// Ok(()) => println!("Cleared the new SD card warning."), - /// Err(err) => println!("Could not set the clear the new SD card warning: {}", err), - /// }; - /// # Ok(()) - /// # } - /// ``` - /// - /// [`InvalidString`]: enum.CommandError.html#variant.InvalidString - /// [`WrongPassword`]: enum.CommandError.html#variant.WrongPassword - pub fn clear_new_sd_card_warning(&self, admin_pin: &str) -> Result<(), CommandError> { - let admin_pin = get_cstring(admin_pin)?; - get_command_result(unsafe { - nitrokey_sys::NK_clear_new_sd_card_warning(admin_pin.as_ptr()) - }) - } - - /// Blinks the red and green LED alternatively and infinitely until the device is reconnected. - pub fn wink(&self) -> Result<(), CommandError> { - get_command_result(unsafe { nitrokey_sys::NK_wink() }) - } - - /// Exports the firmware to the unencrypted volume. - /// - /// This command requires the admin PIN. The unencrypted volume must be in read-write mode - /// when this command is executed. Otherwise, it will still return `Ok` but not write the - /// firmware. - /// - /// This command unmounts the unencrypted volume if it has been mounted, so all buffers should - /// be flushed. The firmware is written to the `firmware.bin` file on the unencrypted volume. - /// - /// # Errors - /// - /// - [`InvalidString`][] if one of the provided passwords contains a null byte - /// - [`WrongPassword`][] if the admin password is wrong - /// - /// [`InvalidString`]: enum.CommandError.html#variant.InvalidString - /// [`WrongPassword`]: enum.CommandError.html#variant.WrongPassword - pub fn export_firmware(&self, admin_pin: &str) -> Result<(), CommandError> { - let admin_pin_string = get_cstring(admin_pin)?; - get_command_result(unsafe { nitrokey_sys::NK_export_firmware(admin_pin_string.as_ptr()) }) - } -} - -impl Drop for Storage { - fn drop(&mut self) { - unsafe { - nitrokey_sys::NK_logout(); - } - } -} - -impl Device for Storage { - fn get_model(&self) -> Model { - Model::Storage - } -} - -impl GenerateOtp for Storage {} - -impl From<nitrokey_sys::NK_storage_ProductionTest> for StorageProductionInfo { - fn from(data: nitrokey_sys::NK_storage_ProductionTest) -> Self { - Self { - firmware_version_major: data.FirmwareVersion_au8[0], - firmware_version_minor: data.FirmwareVersion_au8[1], - firmware_version_internal: data.FirmwareVersionInternal_u8, - serial_number_cpu: data.CPU_CardID_u32, - sd_card: SdCardData { - serial_number: data.SD_CardID_u32, - size: data.SD_Card_Size_u8, - manufacturing_year: data.SD_Card_ManufacturingYear_u8, - manufacturing_month: data.SD_Card_ManufacturingMonth_u8, - oem: data.SD_Card_OEM_u16, - manufacturer: data.SD_Card_Manufacturer_u8, - }, - } - } -} - -impl From<nitrokey_sys::NK_storage_status> for StorageStatus { - fn from(status: nitrokey_sys::NK_storage_status) -> Self { - StorageStatus { - unencrypted_volume: VolumeStatus { - read_only: status.unencrypted_volume_read_only, - active: status.unencrypted_volume_active, - }, - encrypted_volume: VolumeStatus { - read_only: status.encrypted_volume_read_only, - active: status.encrypted_volume_active, - }, - hidden_volume: VolumeStatus { - read_only: status.hidden_volume_read_only, - active: status.hidden_volume_active, - }, - firmware_version_major: status.firmware_version_major, - firmware_version_minor: status.firmware_version_minor, - firmware_locked: status.firmware_locked, - serial_number_sd_card: status.serial_number_sd_card, - serial_number_smart_card: status.serial_number_smart_card, - user_retry_count: status.user_retry_count, - admin_retry_count: status.admin_retry_count, - new_sd_card_found: status.new_sd_card_found, - filled_with_random: status.filled_with_random, - stick_initialized: status.stick_initialized, - } - } -} diff --git a/src/device/mod.rs b/src/device/mod.rs new file mode 100644 index 0000000..c84faa1 --- /dev/null +++ b/src/device/mod.rs @@ -0,0 +1,785 @@ +// Copyright (C) 2018-2019 Robin Krahl <robin.krahl@ireas.org> +// SPDX-License-Identifier: MIT + +mod pro; +mod storage; +mod wrapper; + +use std::convert::{TryFrom, TryInto}; +use std::ffi; +use std::fmt; +use std::str; + +use crate::auth::Authenticate; +use crate::config::{Config, RawConfig}; +use crate::error::{CommunicationError, Error, LibraryError}; +use crate::otp::GenerateOtp; +use crate::pws::GetPasswordSafe; +use crate::util::{ + get_command_result, get_cstring, owned_str_from_ptr, result_or_error, run_with_string, +}; + +pub use pro::Pro; +pub use storage::{ + OperationStatus, SdCardData, Storage, StorageProductionInfo, StorageStatus, VolumeMode, + VolumeStatus, +}; +pub use wrapper::DeviceWrapper; + +/// Available Nitrokey models. +#[derive(Clone, Copy, Debug, PartialEq)] +pub enum Model { + /// The Nitrokey Storage. + Storage, + /// The Nitrokey Pro. + Pro, +} + +impl fmt::Display for Model { + fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { + f.write_str(match *self { + Model::Pro => "Pro", + Model::Storage => "Storage", + }) + } +} + +impl From<Model> for nitrokey_sys::NK_device_model { + fn from(model: Model) -> Self { + match model { + Model::Storage => nitrokey_sys::NK_device_model_NK_STORAGE, + Model::Pro => nitrokey_sys::NK_device_model_NK_PRO, + } + } +} + +impl TryFrom<nitrokey_sys::NK_device_model> for Model { + type Error = Error; + + fn try_from(model: nitrokey_sys::NK_device_model) -> Result<Self, Error> { + match model { + nitrokey_sys::NK_device_model_NK_DISCONNECTED => { + Err(CommunicationError::NotConnected.into()) + } + nitrokey_sys::NK_device_model_NK_PRO => Ok(Model::Pro), + nitrokey_sys::NK_device_model_NK_STORAGE => Ok(Model::Storage), + _ => Err(Error::UnsupportedModelError), + } + } +} + +/// Serial number of a Nitrokey device. +/// +/// The serial number can be formatted as a string using the [`ToString`][] trait, and it can be +/// parsed from a string using the [`FromStr`][] trait. It can also be represented as a 32-bit +/// unsigned integer using [`as_u32`][]. This integer is the ID of the smartcard of the Nitrokey +/// device. +/// +/// Neither the format of the string representation nor the integer representation are guaranteed +/// to stay the same for new firmware versions. +/// +/// [`as_u32`]: #method.as_u32 +/// [`FromStr`]: #impl-FromStr +/// [`ToString`]: #impl-ToString +#[derive(Clone, Copy, Debug, PartialEq)] +pub struct SerialNumber { + value: u32, +} + +impl SerialNumber { + /// Creates an emtpty serial number. + /// + /// This function can be used to create a placeholder value or to compare a `SerialNumber` + /// instance with an empty serial number. + pub fn empty() -> Self { + SerialNumber::new(0) + } + + fn new(value: u32) -> Self { + SerialNumber { value } + } + + /// Returns the integer reprensentation of this serial number. + /// + /// This integer currently is the ID of the smartcard of the Nitrokey device. Upcoming + /// firmware versions might change the meaning of this representation, or add additional + /// components to the serial number. + // To provide a stable API even if the internal representation of SerialNumber changes, we want + // to borrow SerialNumber instead of copying it even if it might be less efficient. + #[allow(clippy::trivially_copy_pass_by_ref)] + pub fn as_u32(&self) -> u32 { + self.value + } +} + +impl fmt::Display for SerialNumber { + fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { + write!(f, "{:#010x}", self.value) + } +} + +impl str::FromStr for SerialNumber { + type Err = Error; + + /// Try to parse a serial number from a hex string. + /// + /// The input string must be a valid hex string. Optionally, it can include a `0x` prefix. + /// + /// # Errors + /// + /// - [`InvalidHexString`][] if the given string is not a valid hex string + /// + /// # Example + /// + /// ```no_run + /// use std::convert::TryFrom; + /// use nitrokey::{DeviceInfo, Error, SerialNumber}; + /// + /// fn find_device(serial_number: &str) -> Result<Option<DeviceInfo>, Error> { + /// let serial_number: SerialNumber = serial_number.parse()?; + /// Ok(nitrokey::list_devices()? + /// .into_iter() + /// .filter(|device| device.serial_number == Some(serial_number)) + /// .next()) + /// } + /// + /// ``` + /// + /// [`InvalidHexString`]: enum.LibraryError.html#variant.InvalidHexString + fn from_str(s: &str) -> Result<SerialNumber, Error> { + // ignore leading 0x + let hex_string = if s.starts_with("0x") { + s.split_at(2).1 + } else { + s + }; + + u32::from_str_radix(hex_string, 16) + .map(SerialNumber::new) + .map_err(|_| LibraryError::InvalidHexString.into()) + } +} + +/// Connection information for a Nitrokey device. +#[derive(Clone, Debug, PartialEq)] +pub struct DeviceInfo { + /// The model of the Nitrokey device, or `None` if the model is not supported by this crate. + pub model: Option<Model>, + /// The USB device path. + pub path: String, + /// The serial number of the device, or `None` if the device does not expose its serial number. + pub serial_number: Option<SerialNumber>, +} + +impl TryFrom<&nitrokey_sys::NK_device_info> for DeviceInfo { + type Error = Error; + + fn try_from(device_info: &nitrokey_sys::NK_device_info) -> Result<DeviceInfo, Error> { + let model_result = device_info.model.try_into(); + let model_option = model_result.map(Some).or_else(|err| match err { + Error::UnsupportedModelError => Ok(None), + _ => Err(err), + })?; + let serial_number = unsafe { ffi::CStr::from_ptr(device_info.serial_number) } + .to_str() + .map_err(Error::from)?; + Ok(DeviceInfo { + model: model_option, + path: owned_str_from_ptr(device_info.path)?, + serial_number: get_hidapi_serial_number(serial_number), + }) + } +} + +impl fmt::Display for DeviceInfo { + fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { + match self.model { + Some(model) => write!(f, "Nitrokey {}", model)?, + None => write!(f, "Unsupported Nitrokey model")?, + } + write!(f, " at {} with ", self.path)?; + match self.serial_number { + Some(serial_number) => write!(f, "serial no. {}", serial_number), + None => write!(f, "an unknown serial number"), + } + } +} + +/// Parses a serial number returned by hidapi. +/// +/// If the serial number is all zero, this function returns `None`. Otherwise, it uses the last +/// eight characters. If these are all zero, the first eight characters are used instead. The +/// selected substring is parse as a hex string and its integer value is returned from the +/// function. If the string cannot be parsed, this function returns `None`. +/// +/// The reason for this behavior is that the Nitrokey Storage does not report its serial number at +/// all (all zero value), while the Nitrokey Pro with firmware 0.9 or later writes its serial +/// number to the last eight characters. Nitrokey Pro devices with firmware 0.8 or earlier wrote +/// their serial number to the first eight characters. +fn get_hidapi_serial_number(serial_number: &str) -> Option<SerialNumber> { + let len = serial_number.len(); + if len < 8 { + // The serial number in the USB descriptor has 12 bytes, we need at least four + return None; + } + + let mut iter = serial_number.char_indices().rev(); + if let Some((i, _)) = iter.find(|(_, c)| *c != '0') { + let substr = if len - i < 8 { + // The last eight characters contain at least one non-zero character --> use them + serial_number.split_at(len - 8).1 + } else { + // The last eight characters are all zero --> use the first eight + serial_number.split_at(8).0 + }; + substr.parse().ok() + } else { + // The serial number is all zero + None + } +} + +/// A firmware version for a Nitrokey device. +#[derive(Clone, Copy, Debug, PartialEq)] +pub struct FirmwareVersion { + /// The major firmware version, e. g. 0 in v0.40. + pub major: u8, + /// The minor firmware version, e. g. 40 in v0.40. + pub minor: u8, +} + +impl fmt::Display for FirmwareVersion { + fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { + write!(f, "v{}.{}", self.major, self.minor) + } +} + +/// The status information common to all Nitrokey devices. +#[derive(Clone, Copy, Debug, PartialEq)] +pub struct Status { + /// The firmware version of the device. + pub firmware_version: FirmwareVersion, + /// The serial number of the device. + pub serial_number: SerialNumber, + /// The configuration of the device. + pub config: Config, +} + +impl From<nitrokey_sys::NK_status> for Status { + fn from(status: nitrokey_sys::NK_status) -> Self { + Self { + firmware_version: FirmwareVersion { + major: status.firmware_version_major, + minor: status.firmware_version_minor, + }, + serial_number: SerialNumber::new(status.serial_number_smart_card), + config: RawConfig::from(&status).into(), + } + } +} + +/// A Nitrokey device. +/// +/// This trait provides the commands that can be executed without authentication and that are +/// present on all supported Nitrokey devices. +pub trait Device<'a>: Authenticate<'a> + GetPasswordSafe<'a> + GenerateOtp + fmt::Debug { + /// Returns the [`Manager`][] instance that has been used to connect to this device. + /// + /// # Example + /// + /// ``` + /// use nitrokey::{Device, DeviceWrapper}; + /// + /// fn do_something(device: DeviceWrapper) { + /// // reconnect to any device + /// let manager = device.into_manager(); + /// let device = manager.connect(); + /// // do something with the device + /// // ... + /// } + /// + /// match nitrokey::take()?.connect() { + /// Ok(device) => do_something(device), + /// Err(err) => println!("Could not connect to a Nitrokey: {}", err), + /// } + /// # Ok::<(), nitrokey::Error>(()) + /// ``` + fn into_manager(self) -> &'a mut crate::Manager; + + /// Returns the model of the connected Nitrokey device. + /// + /// # Example + /// + /// ```no_run + /// use nitrokey::Device; + /// # use nitrokey::Error; + /// + /// # fn try_main() -> Result<(), Error> { + /// let mut manager = nitrokey::take()?; + /// let device = manager.connect()?; + /// println!("Connected to a Nitrokey {}", device.get_model()); + /// # Ok(()) + /// # } + fn get_model(&self) -> Model; + + /// Returns the status of the Nitrokey device. + /// + /// This methods returns the status information common to all Nitrokey devices as a + /// [`Status`][] struct. Some models may provide more information, for example + /// [`get_storage_status`][] returns the [`StorageStatus`][] struct. + /// + /// # Errors + /// + /// - [`NotConnected`][] if the Nitrokey device has been disconnected + /// + /// # Example + /// + /// ```no_run + /// use nitrokey::Device; + /// + /// let mut manager = nitrokey::take()?; + /// let device = manager.connect()?; + /// let status = device.get_status()?; + /// println!("Firmware version: {}", status.firmware_version); + /// println!("Serial number: {}", status.serial_number); + /// # Ok::<(), nitrokey::Error>(()) + /// ``` + /// + /// [`get_storage_status`]: struct.Storage.html#method.get_storage_status + /// [`NotConnected`]: enum.CommunicationError.html#variant.NotConnected + /// [`Status`]: struct.Status.html + /// [`StorageStatus`]: struct.StorageStatus.html + fn get_status(&self) -> Result<Status, Error>; + + /// Returns the serial number of the Nitrokey device. + /// + /// For display purpuses, the serial number should be formatted as an 8-digit hex string. + /// + /// # Example + /// + /// ```no_run + /// use nitrokey::Device; + /// # use nitrokey::Error; + /// + /// # fn try_main() -> Result<(), Error> { + /// let mut manager = nitrokey::take()?; + /// let device = manager.connect()?; + /// match device.get_serial_number() { + /// Ok(number) => println!("serial no: {}", number), + /// Err(err) => eprintln!("Could not get serial number: {}", err), + /// }; + /// # Ok(()) + /// # } + /// ``` + fn get_serial_number(&self) -> Result<SerialNumber, Error> { + run_with_string(unsafe { nitrokey_sys::NK_device_serial_number() }, |s| { + s.parse() + }) + } + + /// Returns the number of remaining authentication attempts for the user. The total number of + /// available attempts is three. + /// + /// # Example + /// + /// ```no_run + /// use nitrokey::Device; + /// # use nitrokey::Error; + /// + /// # fn try_main() -> Result<(), Error> { + /// let mut manager = nitrokey::take()?; + /// let device = manager.connect()?; + /// let count = device.get_user_retry_count(); + /// match device.get_user_retry_count() { + /// Ok(count) => println!("{} remaining authentication attempts (user)", count), + /// Err(err) => eprintln!("Could not get user retry count: {}", err), + /// } + /// # Ok(()) + /// # } + /// ``` + fn get_user_retry_count(&self) -> Result<u8, Error> { + result_or_error(unsafe { nitrokey_sys::NK_get_user_retry_count() }) + } + + /// Returns the number of remaining authentication attempts for the admin. The total number of + /// available attempts is three. + /// + /// # Example + /// + /// ```no_run + /// use nitrokey::Device; + /// # use nitrokey::Error; + /// + /// # fn try_main() -> Result<(), Error> { + /// let mut manager = nitrokey::take()?; + /// let device = manager.connect()?; + /// let count = device.get_admin_retry_count(); + /// match device.get_admin_retry_count() { + /// Ok(count) => println!("{} remaining authentication attempts (admin)", count), + /// Err(err) => eprintln!("Could not get admin retry count: {}", err), + /// } + /// # Ok(()) + /// # } + /// ``` + fn get_admin_retry_count(&self) -> Result<u8, Error> { + result_or_error(unsafe { nitrokey_sys::NK_get_admin_retry_count() }) + } + + /// Returns the firmware version. + /// + /// # Example + /// + /// ```no_run + /// use nitrokey::Device; + /// # use nitrokey::Error; + /// + /// # fn try_main() -> Result<(), Error> { + /// let mut manager = nitrokey::take()?; + /// let device = manager.connect()?; + /// match device.get_firmware_version() { + /// Ok(version) => println!("Firmware version: {}", version), + /// Err(err) => eprintln!("Could not access firmware version: {}", err), + /// }; + /// # Ok(()) + /// # } + /// ``` + fn get_firmware_version(&self) -> Result<FirmwareVersion, Error> { + let major = result_or_error(unsafe { nitrokey_sys::NK_get_major_firmware_version() })?; + let minor = result_or_error(unsafe { nitrokey_sys::NK_get_minor_firmware_version() })?; + Ok(FirmwareVersion { major, minor }) + } + + /// Returns the current configuration of the Nitrokey device. + /// + /// # Example + /// + /// ```no_run + /// use nitrokey::Device; + /// # use nitrokey::Error; + /// + /// # fn try_main() -> Result<(), Error> { + /// let mut manager = nitrokey::take()?; + /// let device = manager.connect()?; + /// let config = device.get_config()?; + /// println!("numlock binding: {:?}", config.numlock); + /// println!("capslock binding: {:?}", config.capslock); + /// println!("scrollock binding: {:?}", config.scrollock); + /// println!("require password for OTP: {:?}", config.user_password); + /// # Ok(()) + /// # } + /// ``` + fn get_config(&self) -> Result<Config, Error> { + let mut raw_status = nitrokey_sys::NK_status { + firmware_version_major: 0, + firmware_version_minor: 0, + serial_number_smart_card: 0, + config_numlock: 0, + config_capslock: 0, + config_scrolllock: 0, + otp_user_password: false, + }; + get_command_result(unsafe { nitrokey_sys::NK_get_status(&mut raw_status) })?; + Ok(RawConfig::from(&raw_status).into()) + } + + /// Changes the administrator PIN. + /// + /// # Errors + /// + /// - [`InvalidString`][] if one of the provided passwords contains a null byte + /// - [`WrongPassword`][] if the current admin password is wrong + /// + /// # Example + /// + /// ```no_run + /// use nitrokey::Device; + /// # use nitrokey::Error; + /// + /// # fn try_main() -> Result<(), Error> { + /// let mut manager = nitrokey::take()?; + /// let mut device = manager.connect()?; + /// match device.change_admin_pin("12345678", "12345679") { + /// Ok(()) => println!("Updated admin PIN."), + /// Err(err) => eprintln!("Failed to update admin PIN: {}", err), + /// }; + /// # Ok(()) + /// # } + /// ``` + /// + /// [`InvalidString`]: enum.LibraryError.html#variant.InvalidString + /// [`WrongPassword`]: enum.CommandError.html#variant.WrongPassword + fn change_admin_pin(&mut self, current: &str, new: &str) -> Result<(), Error> { + let current_string = get_cstring(current)?; + let new_string = get_cstring(new)?; + get_command_result(unsafe { + nitrokey_sys::NK_change_admin_PIN(current_string.as_ptr(), new_string.as_ptr()) + }) + } + + /// Changes the user PIN. + /// + /// # Errors + /// + /// - [`InvalidString`][] if one of the provided passwords contains a null byte + /// - [`WrongPassword`][] if the current user password is wrong + /// + /// # Example + /// + /// ```no_run + /// use nitrokey::Device; + /// # use nitrokey::Error; + /// + /// # fn try_main() -> Result<(), Error> { + /// let mut manager = nitrokey::take()?; + /// let mut device = manager.connect()?; + /// match device.change_user_pin("123456", "123457") { + /// Ok(()) => println!("Updated admin PIN."), + /// Err(err) => eprintln!("Failed to update admin PIN: {}", err), + /// }; + /// # Ok(()) + /// # } + /// ``` + /// + /// [`InvalidString`]: enum.LibraryError.html#variant.InvalidString + /// [`WrongPassword`]: enum.CommandError.html#variant.WrongPassword + fn change_user_pin(&mut self, current: &str, new: &str) -> Result<(), Error> { + let current_string = get_cstring(current)?; + let new_string = get_cstring(new)?; + get_command_result(unsafe { + nitrokey_sys::NK_change_user_PIN(current_string.as_ptr(), new_string.as_ptr()) + }) + } + + /// Unlocks the user PIN after three failed login attempts and sets it to the given value. + /// + /// # Errors + /// + /// - [`InvalidString`][] if one of the provided passwords contains a null byte + /// - [`WrongPassword`][] if the admin password is wrong + /// + /// # Example + /// + /// ```no_run + /// use nitrokey::Device; + /// # use nitrokey::Error; + /// + /// # fn try_main() -> Result<(), Error> { + /// let mut manager = nitrokey::take()?; + /// let mut device = manager.connect()?; + /// match device.unlock_user_pin("12345678", "123456") { + /// Ok(()) => println!("Unlocked user PIN."), + /// Err(err) => eprintln!("Failed to unlock user PIN: {}", err), + /// }; + /// # Ok(()) + /// # } + /// ``` + /// + /// [`InvalidString`]: enum.LibraryError.html#variant.InvalidString + /// [`WrongPassword`]: enum.CommandError.html#variant.WrongPassword + fn unlock_user_pin(&mut self, admin_pin: &str, user_pin: &str) -> Result<(), Error> { + let admin_pin_string = get_cstring(admin_pin)?; + let user_pin_string = get_cstring(user_pin)?; + get_command_result(unsafe { + nitrokey_sys::NK_unlock_user_password( + admin_pin_string.as_ptr(), + user_pin_string.as_ptr(), + ) + }) + } + + /// Locks the Nitrokey device. + /// + /// This disables the password store if it has been unlocked. On the Nitrokey Storage, this + /// also disables the volumes if they have been enabled. + /// + /// # Example + /// + /// ```no_run + /// use nitrokey::Device; + /// # use nitrokey::Error; + /// + /// # fn try_main() -> Result<(), Error> { + /// let mut manager = nitrokey::take()?; + /// let mut device = manager.connect()?; + /// match device.lock() { + /// Ok(()) => println!("Locked the Nitrokey device."), + /// Err(err) => eprintln!("Could not lock the Nitrokey device: {}", err), + /// }; + /// # Ok(()) + /// # } + /// ``` + fn lock(&mut self) -> Result<(), Error> { + get_command_result(unsafe { nitrokey_sys::NK_lock_device() }) + } + + /// Performs a factory reset on the Nitrokey device. + /// + /// This commands performs a factory reset on the smart card (like the factory reset via `gpg + /// --card-edit`) and then clears the flash memory (password safe, one-time passwords etc.). + /// After a factory reset, [`build_aes_key`][] has to be called before the password safe or the + /// encrypted volume can be used. + /// + /// # Errors + /// + /// - [`InvalidString`][] if the provided password contains a null byte + /// - [`WrongPassword`][] if the admin password is wrong + /// + /// # Example + /// + /// ```no_run + /// use nitrokey::Device; + /// # use nitrokey::Error; + /// + /// # fn try_main() -> Result<(), Error> { + /// let mut manager = nitrokey::take()?; + /// let mut device = manager.connect()?; + /// match device.factory_reset("12345678") { + /// Ok(()) => println!("Performed a factory reset."), + /// Err(err) => eprintln!("Could not perform a factory reset: {}", err), + /// }; + /// # Ok(()) + /// # } + /// ``` + /// + /// [`build_aes_key`]: #method.build_aes_key + fn factory_reset(&mut self, admin_pin: &str) -> Result<(), Error> { + let admin_pin_string = get_cstring(admin_pin)?; + get_command_result(unsafe { nitrokey_sys::NK_factory_reset(admin_pin_string.as_ptr()) }) + } + + /// Builds a new AES key on the Nitrokey. + /// + /// The AES key is used to encrypt the password safe and the encrypted volume. You may need + /// to call this method after a factory reset, either using [`factory_reset`][] or using `gpg + /// --card-edit`. You can also use it to destroy the data stored in the password safe or on + /// the encrypted volume. + /// + /// # Errors + /// + /// - [`InvalidString`][] if the provided password contains a null byte + /// - [`WrongPassword`][] if the admin password is wrong + /// + /// # Example + /// + /// ```no_run + /// use nitrokey::Device; + /// # use nitrokey::Error; + /// + /// # fn try_main() -> Result<(), Error> { + /// let mut manager = nitrokey::take()?; + /// let mut device = manager.connect()?; + /// match device.build_aes_key("12345678") { + /// Ok(()) => println!("New AES keys have been built."), + /// Err(err) => eprintln!("Could not build new AES keys: {}", err), + /// }; + /// # Ok(()) + /// # } + /// ``` + /// + /// [`factory_reset`]: #method.factory_reset + fn build_aes_key(&mut self, admin_pin: &str) -> Result<(), Error> { + let admin_pin_string = get_cstring(admin_pin)?; + get_command_result(unsafe { nitrokey_sys::NK_build_aes_key(admin_pin_string.as_ptr()) }) + } +} + +fn get_connected_model() -> Result<Model, Error> { + Model::try_from(unsafe { nitrokey_sys::NK_get_device_model() }) +} + +pub(crate) fn create_device_wrapper( + manager: &mut crate::Manager, + model: Model, +) -> DeviceWrapper<'_> { + match model { + Model::Pro => Pro::new(manager).into(), + Model::Storage => Storage::new(manager).into(), + } +} + +pub(crate) fn get_connected_device( + manager: &mut crate::Manager, +) -> Result<DeviceWrapper<'_>, Error> { + Ok(create_device_wrapper(manager, get_connected_model()?)) +} + +pub(crate) fn connect_enum(model: Model) -> bool { + unsafe { nitrokey_sys::NK_login_enum(model.into()) == 1 } +} + +#[cfg(test)] +mod tests { + use std::str::FromStr; + + use super::{get_hidapi_serial_number, LibraryError, SerialNumber}; + + #[test] + fn test_serial_number_display() { + fn assert_str(s: &str, n: u32) { + assert_eq!(s.to_owned(), SerialNumber::new(n).to_string()); + } + + assert_str("0x00000000", 0); + assert_str("0x00001000", 0x1000); + assert_str("0x12345678", 0x12345678); + } + + #[test] + fn test_serial_number_try_from() { + fn assert_ok(v: u32, s: &str) { + assert_eq!(SerialNumber::new(v), SerialNumber::from_str(s).unwrap()); + assert_eq!( + SerialNumber::new(v), + SerialNumber::from_str(format!("0x{}", s).as_ref()).unwrap() + ); + } + + fn assert_err(s: &str) { + match SerialNumber::from_str(s).unwrap_err() { + super::Error::LibraryError(LibraryError::InvalidHexString) => {} + err => assert!( + false, + "expected InvalidHexString error, got {} (input {})", + err, s + ), + } + } + + assert_ok(0x1234, "1234"); + assert_ok(0x1234, "01234"); + assert_ok(0x1234, "001234"); + assert_ok(0x1234, "0001234"); + + assert_ok(0, "0"); + assert_ok(0xdeadbeef, "deadbeef"); + + assert_err("deadpork"); + assert_err("blubb"); + assert_err(""); + } + + #[test] + fn test_get_hidapi_serial_number() { + fn assert_none(s: &str) { + assert_eq!(None, get_hidapi_serial_number(s)); + } + + fn assert_some(n: u32, s: &str) { + assert_eq!(Some(SerialNumber::new(n)), get_hidapi_serial_number(s)); + } + + assert_none(""); + assert_none("00000000000000000"); + assert_none("blubb"); + assert_none("1234"); + + assert_some(0x1234, "00001234"); + assert_some(0x1234, "000000001234"); + assert_some(0x1234, "100000001234"); + assert_some(0x12340000, "123400000000"); + assert_some(0x5678, "000000000000000000005678"); + assert_some(0x1234, "000012340000000000000000"); + assert_some(0xffff, "00000000000000000000FFFF"); + assert_some(0xffff, "00000000000000000000ffff"); + } +} diff --git a/src/device/pro.rs b/src/device/pro.rs new file mode 100644 index 0000000..0d5443e --- /dev/null +++ b/src/device/pro.rs @@ -0,0 +1,93 @@ +// Copyright (C) 2018-2019 Robin Krahl <robin.krahl@ireas.org> +// SPDX-License-Identifier: MIT + +use crate::device::{Device, Model, Status}; +use crate::error::Error; +use crate::otp::GenerateOtp; +use crate::util::get_command_result; + +/// A Nitrokey Pro device without user or admin authentication. +/// +/// Use the [`connect`][] method to obtain an instance wrapper or the [`connect_pro`] method to +/// directly obtain an instance. If you want to execute a command that requires user or admin +/// authentication, use [`authenticate_admin`][] or [`authenticate_user`][]. +/// +/// # Examples +/// +/// Authentication with error handling: +/// +/// ```no_run +/// use nitrokey::{Authenticate, User, Pro}; +/// # use nitrokey::Error; +/// +/// fn perform_user_task<'a>(device: &User<'a, Pro<'a>>) {} +/// fn perform_other_task(device: &Pro) {} +/// +/// # fn try_main() -> Result<(), Error> { +/// let mut manager = nitrokey::take()?; +/// let device = manager.connect_pro()?; +/// let device = match device.authenticate_user("123456") { +/// Ok(user) => { +/// perform_user_task(&user); +/// user.device() +/// }, +/// Err((device, err)) => { +/// eprintln!("Could not authenticate as user: {}", err); +/// device +/// }, +/// }; +/// perform_other_task(&device); +/// # Ok(()) +/// # } +/// ``` +/// +/// [`authenticate_admin`]: trait.Authenticate.html#method.authenticate_admin +/// [`authenticate_user`]: trait.Authenticate.html#method.authenticate_user +/// [`connect`]: struct.Manager.html#method.connect +/// [`connect_pro`]: struct.Manager.html#method.connect_pro +#[derive(Debug)] +pub struct Pro<'a> { + manager: Option<&'a mut crate::Manager>, +} + +impl<'a> Pro<'a> { + pub(crate) fn new(manager: &'a mut crate::Manager) -> Pro<'a> { + Pro { + manager: Some(manager), + } + } +} + +impl<'a> Drop for Pro<'a> { + fn drop(&mut self) { + unsafe { + nitrokey_sys::NK_logout(); + } + } +} + +impl<'a> Device<'a> for Pro<'a> { + fn into_manager(mut self) -> &'a mut crate::Manager { + self.manager.take().unwrap() + } + + fn get_model(&self) -> Model { + Model::Pro + } + + fn get_status(&self) -> Result<Status, Error> { + let mut raw_status = nitrokey_sys::NK_status { + firmware_version_major: 0, + firmware_version_minor: 0, + serial_number_smart_card: 0, + config_numlock: 0, + config_capslock: 0, + config_scrolllock: 0, + otp_user_password: false, + }; + get_command_result(unsafe { nitrokey_sys::NK_get_status(&mut raw_status) })?; + Ok(raw_status.into()) + } +} + +impl<'a> GenerateOtp for Pro<'a> {} diff --git a/src/device/storage.rs b/src/device/storage.rs new file mode 100644 index 0000000..a18d94f --- /dev/null +++ b/src/device/storage.rs @@ -0,0 +1,886 @@ +// Copyright (C) 2019-2020 Robin Krahl <robin.krahl@ireas.org> +// SPDX-License-Identifier: MIT + +use std::convert::TryFrom as _; +use std::fmt; +use std::ops; + +use crate::device::{Device, FirmwareVersion, Model, SerialNumber, Status}; +use crate::error::{CommandError, Error}; +use crate::otp::GenerateOtp; +use crate::util::{get_command_result, get_cstring, get_last_error}; + +/// A Nitrokey Storage device without user or admin authentication. +/// +/// Use the [`connect`][] method to obtain an instance wrapper or the [`connect_storage`] method to +/// directly obtain an instance. If you want to execute a command that requires user or admin +/// authentication, use [`authenticate_admin`][] or [`authenticate_user`][]. +/// +/// # Examples +/// +/// Authentication with error handling: +/// +/// ```no_run +/// use nitrokey::{Authenticate, User, Storage}; +/// # use nitrokey::Error; +/// +/// fn perform_user_task<'a>(device: &User<'a, Storage<'a>>) {} +/// fn perform_other_task(device: &Storage) {} +/// +/// # fn try_main() -> Result<(), Error> { +/// let mut manager = nitrokey::take()?; +/// let device = manager.connect_storage()?; +/// let device = match device.authenticate_user("123456") { +/// Ok(user) => { +/// perform_user_task(&user); +/// user.device() +/// }, +/// Err((device, err)) => { +/// eprintln!("Could not authenticate as user: {}", err); +/// device +/// }, +/// }; +/// perform_other_task(&device); +/// # Ok(()) +/// # } +/// ``` +/// +/// [`authenticate_admin`]: trait.Authenticate.html#method.authenticate_admin +/// [`authenticate_user`]: trait.Authenticate.html#method.authenticate_user +/// [`connect`]: struct.Manager.html#method.connect +/// [`connect_storage`]: struct.Manager.html#method.connect_storage +#[derive(Debug)] +pub struct Storage<'a> { + manager: Option<&'a mut crate::Manager>, +} + +/// The access mode of a volume on the Nitrokey Storage. +#[derive(Clone, Copy, Debug, PartialEq)] +pub enum VolumeMode { + /// A read-only volume. + ReadOnly, + /// A read-write volume. + ReadWrite, +} + +impl fmt::Display for VolumeMode { + fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { + f.write_str(match *self { + VolumeMode::ReadOnly => "read-only", + VolumeMode::ReadWrite => "read-write", + }) + } +} + +/// The status of a volume on a Nitrokey Storage device. +#[derive(Debug)] +pub struct VolumeStatus { + /// Indicates whether the volume is read-only. + pub read_only: bool, + /// Indicates whether the volume is active. + pub active: bool, +} + +/// Information about the SD card in a Storage device. +#[derive(Debug)] +pub struct SdCardData { + /// The serial number of the SD card. + pub serial_number: u32, + /// The size of the SD card in GB. + pub size: u8, + /// The year the card was manufactured, e. g. 17 for 2017. + pub manufacturing_year: u8, + /// The month the card was manufactured. + pub manufacturing_month: u8, + /// The OEM ID. + pub oem: u16, + /// The manufacturer ID. + pub manufacturer: u8, +} + +/// Production information for a Storage device. +#[derive(Debug)] +pub struct StorageProductionInfo { + /// The firmware version. + pub firmware_version: FirmwareVersion, + /// The internal firmware version. + pub firmware_version_internal: u8, + /// The serial number of the CPU. + pub serial_number_cpu: u32, + /// Information about the SD card. + pub sd_card: SdCardData, +} + +/// The status of a Nitrokey Storage device. +#[derive(Debug)] +pub struct StorageStatus { + /// The status of the unencrypted volume. + pub unencrypted_volume: VolumeStatus, + /// The status of the encrypted volume. + pub encrypted_volume: VolumeStatus, + /// The status of the hidden volume. + pub hidden_volume: VolumeStatus, + /// The firmware version. + pub firmware_version: FirmwareVersion, + /// Indicates whether the firmware is locked. + pub firmware_locked: bool, + /// The serial number of the SD card in the Storage stick. + pub serial_number_sd_card: u32, + /// The serial number of the smart card in the Storage stick. + pub serial_number_smart_card: u32, + /// The number of remaining login attempts for the user PIN. + pub user_retry_count: u8, + /// The number of remaining login attempts for the admin PIN. + pub admin_retry_count: u8, + /// Indicates whether a new SD card was found. + pub new_sd_card_found: bool, + /// Indicates whether the SD card is filled with random characters. + pub filled_with_random: bool, + /// Indicates whether the stick has been initialized by generating + /// the AES keys. + pub stick_initialized: bool, +} + +/// The progress of a background operation on the Nitrokey. +/// +/// Some commands may start a background operation during which no other commands can be executed. +/// This enum stores the status of a background operation: Ongoing with a relative progress (up to +/// 100), or idle, i. e. no background operation has been started or the last one has been +/// finished. +#[derive(Clone, Copy, Debug, PartialEq)] +pub enum OperationStatus { + /// A background operation with its progress value (less than or equal to 100). + Ongoing(u8), + /// No backgrund operation. + Idle, +} + +impl<'a> Storage<'a> { + pub(crate) fn new(manager: &'a mut crate::Manager) -> Storage<'a> { + Storage { + manager: Some(manager), + } + } + + /// Changes the update PIN. + /// + /// The update PIN is used to enable firmware updates. Unlike the user and the admin PIN, the + /// update PIN is not managed by the OpenPGP smart card but by the Nitrokey firmware. There is + /// no retry counter as with the other PIN types. + /// + /// # Errors + /// + /// - [`InvalidString`][] if one of the provided passwords contains a null byte + /// - [`WrongPassword`][] if the current update password is wrong + /// + /// # Example + /// + /// ```no_run + /// # use nitrokey::Error; + /// + /// # fn try_main() -> Result<(), Error> { + /// let mut manager = nitrokey::take()?; + /// let mut device = manager.connect_storage()?; + /// match device.change_update_pin("12345678", "87654321") { + /// Ok(()) => println!("Updated update PIN."), + /// Err(err) => eprintln!("Failed to update update PIN: {}", err), + /// }; + /// # Ok(()) + /// # } + /// ``` + /// + /// [`InvalidString`]: enum.LibraryError.html#variant.InvalidString + /// [`WrongPassword`]: enum.CommandError.html#variant.WrongPassword + pub fn change_update_pin(&mut self, current: &str, new: &str) -> Result<(), Error> { + let current_string = get_cstring(current)?; + let new_string = get_cstring(new)?; + get_command_result(unsafe { + nitrokey_sys::NK_change_update_password(current_string.as_ptr(), new_string.as_ptr()) + }) + } + + /// Enables the firmware update mode. + /// + /// During firmware update mode, the Nitrokey can no longer be accessed using HID commands. + /// To resume normal operation, run `dfu-programmer at32uc3a3256s launch`. In order to enter + /// the firmware update mode, you need the update password that can be changed using the + /// [`change_update_pin`][] method. + /// + /// # Errors + /// + /// - [`InvalidString`][] if one of the provided passwords contains a null byte + /// - [`WrongPassword`][] if the current update password is wrong + /// + /// # Example + /// + /// ```no_run + /// # use nitrokey::Error; + /// + /// # fn try_main() -> Result<(), Error> { + /// let mut manager = nitrokey::take()?; + /// let mut device = manager.connect_storage()?; + /// match device.enable_firmware_update("12345678") { + /// Ok(()) => println!("Nitrokey entered update mode."), + /// Err(err) => eprintln!("Could not enter update mode: {}", err), + /// }; + /// # Ok(()) + /// # } + /// ``` + /// + /// [`InvalidString`]: enum.LibraryError.html#variant.InvalidString + /// [`WrongPassword`]: enum.CommandError.html#variant.WrongPassword + pub fn enable_firmware_update(&mut self, update_pin: &str) -> Result<(), Error> { + let update_pin_string = get_cstring(update_pin)?; + get_command_result(unsafe { + nitrokey_sys::NK_enable_firmware_update(update_pin_string.as_ptr()) + }) + } + + /// Enables the encrypted storage volume. + /// + /// Once the encrypted volume is enabled, it is presented to the operating system as a block + /// device. The API does not provide any information on the name or path of this block device. + /// + /// # Errors + /// + /// - [`InvalidString`][] if the provided password contains a null byte + /// - [`WrongPassword`][] if the provided user password is wrong + /// + /// # Example + /// + /// ```no_run + /// # use nitrokey::Error; + /// + /// # fn try_main() -> Result<(), Error> { + /// let mut manager = nitrokey::take()?; + /// let mut device = manager.connect_storage()?; + /// match device.enable_encrypted_volume("123456") { + /// Ok(()) => println!("Enabled the encrypted volume."), + /// Err(err) => eprintln!("Could not enable the encrypted volume: {}", err), + /// }; + /// # Ok(()) + /// # } + /// ``` + /// + /// [`InvalidString`]: enum.LibraryError.html#variant.InvalidString + /// [`WrongPassword`]: enum.CommandError.html#variant.WrongPassword + pub fn enable_encrypted_volume(&mut self, user_pin: &str) -> Result<(), Error> { + let user_pin = get_cstring(user_pin)?; + get_command_result(unsafe { nitrokey_sys::NK_unlock_encrypted_volume(user_pin.as_ptr()) }) + } + + /// Disables the encrypted storage volume. + /// + /// Once the volume is disabled, it can be no longer accessed as a block device. If the + /// encrypted volume has not been enabled, this method still returns a success. + /// + /// # Example + /// + /// ```no_run + /// # use nitrokey::Error; + /// + /// fn use_volume() {} + /// + /// # fn try_main() -> Result<(), Error> { + /// let mut manager = nitrokey::take()?; + /// let mut device = manager.connect_storage()?; + /// match device.enable_encrypted_volume("123456") { + /// Ok(()) => { + /// println!("Enabled the encrypted volume."); + /// use_volume(); + /// match device.disable_encrypted_volume() { + /// Ok(()) => println!("Disabled the encrypted volume."), + /// Err(err) => { + /// eprintln!("Could not disable the encrypted volume: {}", err); + /// }, + /// }; + /// }, + /// Err(err) => eprintln!("Could not enable the encrypted volume: {}", err), + /// }; + /// # Ok(()) + /// # } + /// ``` + pub fn disable_encrypted_volume(&mut self) -> Result<(), Error> { + get_command_result(unsafe { nitrokey_sys::NK_lock_encrypted_volume() }) + } + + /// Enables a hidden storage volume. + /// + /// This function will only succeed if the encrypted storage ([`enable_encrypted_volume`][]) or + /// another hidden volume has been enabled previously. Once the hidden volume is enabled, it + /// is presented to the operating system as a block device and any previously opened encrypted + /// or hidden volumes are closed. The API does not provide any information on the name or path + /// of this block device. + /// + /// Note that the encrypted and the hidden volumes operate on the same storage area, so using + /// both at the same time might lead to data loss. + /// + /// The hidden volume to unlock is selected based on the provided password. + /// + /// # Errors + /// + /// - [`AesDecryptionFailed`][] if the encrypted storage has not been opened before calling + /// this method or the AES key has not been built + /// - [`InvalidString`][] if the provided password contains a null byte + /// + /// # Example + /// + /// ```no_run + /// # use nitrokey::Error; + /// + /// # fn try_main() -> Result<(), Error> { + /// let mut manager = nitrokey::take()?; + /// let mut device = manager.connect_storage()?; + /// device.enable_encrypted_volume("123445")?; + /// match device.enable_hidden_volume("hidden-pw") { + /// Ok(()) => println!("Enabled a hidden volume."), + /// Err(err) => eprintln!("Could not enable the hidden volume: {}", err), + /// }; + /// # Ok(()) + /// # } + /// ``` + /// + /// [`enable_encrypted_volume`]: #method.enable_encrypted_volume + /// [`AesDecryptionFailed`]: enum.CommandError.html#variant.AesDecryptionFailed + /// [`InvalidString`]: enum.LibraryError.html#variant.InvalidString + pub fn enable_hidden_volume(&mut self, volume_password: &str) -> Result<(), Error> { + let volume_password = get_cstring(volume_password)?; + get_command_result(unsafe { + nitrokey_sys::NK_unlock_hidden_volume(volume_password.as_ptr()) + }) + } + + /// Disables a hidden storage volume. + /// + /// Once the volume is disabled, it can be no longer accessed as a block device. If no hidden + /// volume has been enabled, this method still returns a success. + /// + /// # Example + /// + /// ```no_run + /// # use nitrokey::Error; + /// + /// fn use_volume() {} + /// + /// # fn try_main() -> Result<(), Error> { + /// let mut manager = nitrokey::take()?; + /// let mut device = manager.connect_storage()?; + /// device.enable_encrypted_volume("123445")?; + /// match device.enable_hidden_volume("hidden-pw") { + /// Ok(()) => { + /// println!("Enabled the hidden volume."); + /// use_volume(); + /// match device.disable_hidden_volume() { + /// Ok(()) => println!("Disabled the hidden volume."), + /// Err(err) => { + /// eprintln!("Could not disable the hidden volume: {}", err); + /// }, + /// }; + /// }, + /// Err(err) => eprintln!("Could not enable the hidden volume: {}", err), + /// }; + /// # Ok(()) + /// # } + /// ``` + pub fn disable_hidden_volume(&mut self) -> Result<(), Error> { + get_command_result(unsafe { nitrokey_sys::NK_lock_hidden_volume() }) + } + + /// Creates a hidden volume. + /// + /// The volume is crated in the given slot and in the given range of the available memory, + /// where `start` is the start position as a percentage of the available memory, and `end` is + /// the end position as a percentage of the available memory. The volume will be protected by + /// the given password. + /// + /// Note that the encrypted and the hidden volumes operate on the same storage area, so using + /// both at the same time might lead to data loss. + /// + /// According to the libnitrokey documentation, this function only works if the encrypted + /// storage has been opened. + /// + /// # Errors + /// + /// - [`AesDecryptionFailed`][] if the encrypted storage has not been opened before calling + /// this method or the AES key has not been built + /// - [`InvalidString`][] if the provided password contains a null byte + /// + /// # Example + /// + /// ```no_run + /// # use nitrokey::Error; + /// + /// # fn try_main() -> Result<(), Error> { + /// let mut manager = nitrokey::take()?; + /// let mut device = manager.connect_storage()?; + /// device.enable_encrypted_volume("123445")?; + /// device.create_hidden_volume(0, 0, 100, "hidden-pw")?; + /// # Ok(()) + /// # } + /// ``` + /// + /// [`AesDecryptionFailed`]: enum.CommandError.html#variant.AesDecryptionFailed + /// [`InvalidString`]: enum.LibraryError.html#variant.InvalidString + pub fn create_hidden_volume( + &mut self, + slot: u8, + start: u8, + end: u8, + password: &str, + ) -> Result<(), Error> { + let password = get_cstring(password)?; + get_command_result(unsafe { + nitrokey_sys::NK_create_hidden_volume(slot, start, end, password.as_ptr()) + }) + } + + /// Sets the access mode of the unencrypted volume. + /// + /// This command will reconnect the unencrypted volume so buffers should be flushed before + /// calling it. Since firmware version v0.51, this command requires the admin PIN. Older + /// firmware versions are not supported. + /// + /// # Errors + /// + /// - [`InvalidString`][] if the provided password contains a null byte + /// - [`WrongPassword`][] if the provided admin password is wrong + /// + /// # Example + /// + /// ```no_run + /// # use nitrokey::Error; + /// use nitrokey::VolumeMode; + /// + /// # fn try_main() -> Result<(), Error> { + /// let mut manager = nitrokey::take()?; + /// let mut device = manager.connect_storage()?; + /// match device.set_unencrypted_volume_mode("12345678", VolumeMode::ReadWrite) { + /// Ok(()) => println!("Set the unencrypted volume to read-write mode."), + /// Err(err) => eprintln!("Could not set the unencrypted volume to read-write mode: {}", err), + /// }; + /// # Ok(()) + /// # } + /// ``` + /// + /// [`InvalidString`]: enum.LibraryError.html#variant.InvalidString + /// [`WrongPassword`]: enum.CommandError.html#variant.WrongPassword + pub fn set_unencrypted_volume_mode( + &mut self, + admin_pin: &str, + mode: VolumeMode, + ) -> Result<(), Error> { + let admin_pin = get_cstring(admin_pin)?; + let result = match mode { + VolumeMode::ReadOnly => unsafe { + nitrokey_sys::NK_set_unencrypted_read_only_admin(admin_pin.as_ptr()) + }, + VolumeMode::ReadWrite => unsafe { + nitrokey_sys::NK_set_unencrypted_read_write_admin(admin_pin.as_ptr()) + }, + }; + get_command_result(result) + } + + /// Sets the access mode of the encrypted volume. + /// + /// This command will reconnect the encrypted volume so buffers should be flushed before + /// calling it. It is only available in firmware version 0.49. + /// + /// # Errors + /// + /// - [`InvalidString`][] if the provided password contains a null byte + /// - [`WrongPassword`][] if the provided admin password is wrong + /// + /// # Example + /// + /// ```no_run + /// # use nitrokey::Error; + /// use nitrokey::VolumeMode; + /// + /// # fn try_main() -> Result<(), Error> { + /// let mut manager = nitrokey::take()?; + /// let mut device = manager.connect_storage()?; + /// match device.set_encrypted_volume_mode("12345678", VolumeMode::ReadWrite) { + /// Ok(()) => println!("Set the encrypted volume to read-write mode."), + /// Err(err) => eprintln!("Could not set the encrypted volume to read-write mode: {}", err), + /// }; + /// # Ok(()) + /// # } + /// ``` + /// + /// [`InvalidString`]: enum.LibraryError.html#variant.InvalidString + /// [`WrongPassword`]: enum.CommandError.html#variant.WrongPassword + pub fn set_encrypted_volume_mode( + &mut self, + admin_pin: &str, + mode: VolumeMode, + ) -> Result<(), Error> { + let admin_pin = get_cstring(admin_pin)?; + let result = match mode { + VolumeMode::ReadOnly => unsafe { + nitrokey_sys::NK_set_encrypted_read_only(admin_pin.as_ptr()) + }, + VolumeMode::ReadWrite => unsafe { + nitrokey_sys::NK_set_encrypted_read_write(admin_pin.as_ptr()) + }, + }; + get_command_result(result) + } + + /// Returns the status of the connected storage device. + /// + /// # Example + /// + /// ```no_run + /// # use nitrokey::Error; + /// + /// fn use_volume() {} + /// + /// # fn try_main() -> Result<(), Error> { + /// let mut manager = nitrokey::take()?; + /// let device = manager.connect_storage()?; + /// match device.get_storage_status() { + /// Ok(status) => { + /// println!("SD card ID: {:#x}", status.serial_number_sd_card); + /// }, + /// Err(err) => eprintln!("Could not get Storage status: {}", err), + /// }; + /// # Ok(()) + /// # } + /// ``` + pub fn get_storage_status(&self) -> Result<StorageStatus, Error> { + let mut raw_status = nitrokey_sys::NK_storage_status { + unencrypted_volume_read_only: false, + unencrypted_volume_active: false, + encrypted_volume_read_only: false, + encrypted_volume_active: false, + hidden_volume_read_only: false, + hidden_volume_active: false, + firmware_version_major: 0, + firmware_version_minor: 0, + firmware_locked: false, + serial_number_sd_card: 0, + serial_number_smart_card: 0, + user_retry_count: 0, + admin_retry_count: 0, + new_sd_card_found: false, + filled_with_random: false, + stick_initialized: false, + }; + let raw_result = unsafe { nitrokey_sys::NK_get_status_storage(&mut raw_status) }; + get_command_result(raw_result).map(|_| StorageStatus::from(raw_status)) + } + + /// Returns the production information for the connected storage device. + /// + /// # Example + /// + /// ```no_run + /// # use nitrokey::Error; + /// + /// fn use_volume() {} + /// + /// # fn try_main() -> Result<(), Error> { + /// let mut manager = nitrokey::take()?; + /// let device = manager.connect_storage()?; + /// match device.get_production_info() { + /// Ok(data) => { + /// println!("SD card ID: {:#x}", data.sd_card.serial_number); + /// println!("SD card size: {} GB", data.sd_card.size); + /// }, + /// Err(err) => eprintln!("Could not get Storage production info: {}", err), + /// }; + /// # Ok(()) + /// # } + /// ``` + pub fn get_production_info(&self) -> Result<StorageProductionInfo, Error> { + let mut raw_data = nitrokey_sys::NK_storage_ProductionTest { + FirmwareVersion_au8: [0, 2], + FirmwareVersionInternal_u8: 0, + SD_Card_Size_u8: 0, + CPU_CardID_u32: 0, + SmartCardID_u32: 0, + SD_CardID_u32: 0, + SC_UserPwRetryCount: 0, + SC_AdminPwRetryCount: 0, + SD_Card_ManufacturingYear_u8: 0, + SD_Card_ManufacturingMonth_u8: 0, + SD_Card_OEM_u16: 0, + SD_WriteSpeed_u16: 0, + SD_Card_Manufacturer_u8: 0, + }; + let raw_result = unsafe { nitrokey_sys::NK_get_storage_production_info(&mut raw_data) }; + get_command_result(raw_result).map(|_| StorageProductionInfo::from(raw_data)) + } + + /// Clears the warning for a new SD card. + /// + /// The Storage status contains a field for a new SD card warning. After a factory reset, the + /// field is set to true. After filling the SD card with random data, it is set to false. + /// This method can be used to set it to false without filling the SD card with random data. + /// + /// # Errors + /// + /// - [`InvalidString`][] if the provided password contains a null byte + /// - [`WrongPassword`][] if the provided admin password is wrong + /// + /// # Example + /// + /// ```no_run + /// # use nitrokey::Error; + /// + /// # fn try_main() -> Result<(), Error> { + /// let mut manager = nitrokey::take()?; + /// let mut device = manager.connect_storage()?; + /// match device.clear_new_sd_card_warning("12345678") { + /// Ok(()) => println!("Cleared the new SD card warning."), + /// Err(err) => eprintln!("Could not set the clear the new SD card warning: {}", err), + /// }; + /// # Ok(()) + /// # } + /// ``` + /// + /// [`InvalidString`]: enum.LibraryError.html#variant.InvalidString + /// [`WrongPassword`]: enum.CommandError.html#variant.WrongPassword + pub fn clear_new_sd_card_warning(&mut self, admin_pin: &str) -> Result<(), Error> { + let admin_pin = get_cstring(admin_pin)?; + get_command_result(unsafe { + nitrokey_sys::NK_clear_new_sd_card_warning(admin_pin.as_ptr()) + }) + } + + /// Returns a range of the SD card that has not been used to during this power cycle. + /// + /// The Nitrokey Storage tracks read and write access to the SD card during a power cycle. + /// This method returns a range of the SD card that has not been accessed during this power + /// cycle. The range is relative to the total size of the SD card, so both values are less + /// than or equal to 100. This can be used as a guideline when creating a hidden volume. + /// + /// # Example + /// + /// ```no_run + /// let mut manager = nitrokey::take()?; + /// let storage = manager.connect_storage()?; + /// let usage = storage.get_sd_card_usage()?; + /// println!("SD card usage: {}..{}", usage.start, usage.end); + /// # Ok::<(), nitrokey::Error>(()) + /// ``` + pub fn get_sd_card_usage(&self) -> Result<ops::Range<u8>, Error> { + let mut usage_data = nitrokey_sys::NK_SD_usage_data { + write_level_min: 0, + write_level_max: 0, + }; + let result = unsafe { nitrokey_sys::NK_get_SD_usage_data(&mut usage_data) }; + match get_command_result(result) { + Ok(_) => { + if usage_data.write_level_min > usage_data.write_level_max + || usage_data.write_level_max > 100 + { + Err(Error::UnexpectedError("Invalid write levels".to_owned())) + } else { + Ok(ops::Range { + start: usage_data.write_level_min, + end: usage_data.write_level_max, + }) + } + } + Err(err) => Err(err), + } + } + + /// Blinks the red and green LED alternatively and infinitely until the device is reconnected. + pub fn wink(&mut self) -> Result<(), Error> { + get_command_result(unsafe { nitrokey_sys::NK_wink() }) + } + + /// Returns the status of an ongoing background operation on the Nitrokey Storage. + /// + /// Some commands may start a background operation during which no other commands can be + /// executed. This method can be used to check whether such an operation is ongoing. + /// + /// Currently, this is only used by the [`fill_sd_card`][] method. + /// + /// [`fill_sd_card`]: #method.fill_sd_card + pub fn get_operation_status(&self) -> Result<OperationStatus, Error> { + let status = unsafe { nitrokey_sys::NK_get_progress_bar_value() }; + match status { + 0..=100 => u8::try_from(status) + .map(OperationStatus::Ongoing) + .map_err(|_| { + Error::UnexpectedError("Cannot create u8 from operation status".to_owned()) + }), + -1 => Ok(OperationStatus::Idle), + -2 => Err(get_last_error()), + _ => Err(Error::UnexpectedError( + "Invalid operation status".to_owned(), + )), + } + } + + /// Overwrites the SD card with random data. + /// + /// Ths method starts a background operation that overwrites the SD card with random data. + /// While this operation is ongoing, no other commands can be executed. Use the + /// [`get_operation_status`][] function to check the progress of the operation. + /// + /// # Errors + /// + /// - [`InvalidString`][] if one of the provided passwords contains a null byte + /// - [`WrongPassword`][] if the admin password is wrong + /// + /// # Example + /// + /// ```no_run + /// use nitrokey::OperationStatus; + /// + /// let mut manager = nitrokey::take()?; + /// let mut storage = manager.connect_storage()?; + /// storage.fill_sd_card("12345678")?; + /// loop { + /// match storage.get_operation_status()? { + /// OperationStatus::Ongoing(progress) => println!("{}/100", progress), + /// OperationStatus::Idle => { + /// println!("Done!"); + /// break; + /// } + /// } + /// } + /// # Ok::<(), nitrokey::Error>(()) + /// ``` + /// + /// [`get_operation_status`]: #method.get_operation_status + /// [`InvalidString`]: enum.LibraryError.html#variant.InvalidString + /// [`WrongPassword`]: enum.CommandError.html#variant.WrongPassword + pub fn fill_sd_card(&mut self, admin_pin: &str) -> Result<(), Error> { + let admin_pin_string = get_cstring(admin_pin)?; + get_command_result(unsafe { + nitrokey_sys::NK_fill_SD_card_with_random_data(admin_pin_string.as_ptr()) + }) + .or_else(|err| match err { + // libnitrokey’s C API returns a LongOperationInProgressException with the same error + // code as the WrongCrc command error, so we cannot distinguish them. + Error::CommandError(CommandError::WrongCrc) => Ok(()), + err => Err(err), + }) + } + + /// Exports the firmware to the unencrypted volume. + /// + /// This command requires the admin PIN. The unencrypted volume must be in read-write mode + /// when this command is executed. Otherwise, it will still return `Ok` but not write the + /// firmware. + /// + /// This command unmounts the unencrypted volume if it has been mounted, so all buffers should + /// be flushed. The firmware is written to the `firmware.bin` file on the unencrypted volume. + /// + /// # Errors + /// + /// - [`InvalidString`][] if one of the provided passwords contains a null byte + /// - [`WrongPassword`][] if the admin password is wrong + /// + /// [`InvalidString`]: enum.LibraryError.html#variant.InvalidString + /// [`WrongPassword`]: enum.CommandError.html#variant.WrongPassword + pub fn export_firmware(&mut self, admin_pin: &str) -> Result<(), Error> { + let admin_pin_string = get_cstring(admin_pin)?; + get_command_result(unsafe { nitrokey_sys::NK_export_firmware(admin_pin_string.as_ptr()) }) + } +} + +impl<'a> Drop for Storage<'a> { + fn drop(&mut self) { + unsafe { + nitrokey_sys::NK_logout(); + } + } +} + +impl<'a> Device<'a> for Storage<'a> { + fn into_manager(mut self) -> &'a mut crate::Manager { + self.manager.take().unwrap() + } + + fn get_model(&self) -> Model { + Model::Storage + } + + fn get_status(&self) -> Result<Status, Error> { + // Currently, the GET_STATUS command does not report the correct firmware version and + // serial number on the Nitrokey Storage, see [0]. Until this is fixed in libnitrokey, we + // have to manually execute the GET_DEVICE_STATUS command (get_storage_status) and complete + // the missing data, see [1]. + // [0] https://github.com/Nitrokey/nitrokey-storage-firmware/issues/96 + // [1] https://github.com/Nitrokey/libnitrokey/issues/166 + + let mut raw_status = nitrokey_sys::NK_status { + firmware_version_major: 0, + firmware_version_minor: 0, + serial_number_smart_card: 0, + config_numlock: 0, + config_capslock: 0, + config_scrolllock: 0, + otp_user_password: false, + }; + get_command_result(unsafe { nitrokey_sys::NK_get_status(&mut raw_status) })?; + let mut status = Status::from(raw_status); + + let storage_status = self.get_storage_status()?; + status.firmware_version = storage_status.firmware_version; + status.serial_number = SerialNumber::new(storage_status.serial_number_smart_card); + + Ok(status) + } +} + +impl<'a> GenerateOtp for Storage<'a> {} + +impl From<nitrokey_sys::NK_storage_ProductionTest> for StorageProductionInfo { + fn from(data: nitrokey_sys::NK_storage_ProductionTest) -> Self { + Self { + firmware_version: FirmwareVersion { + major: data.FirmwareVersion_au8[0], + minor: data.FirmwareVersion_au8[1], + }, + firmware_version_internal: data.FirmwareVersionInternal_u8, + serial_number_cpu: data.CPU_CardID_u32, + sd_card: SdCardData { + serial_number: data.SD_CardID_u32, + size: data.SD_Card_Size_u8, + manufacturing_year: data.SD_Card_ManufacturingYear_u8, + manufacturing_month: data.SD_Card_ManufacturingMonth_u8, + oem: data.SD_Card_OEM_u16, + manufacturer: data.SD_Card_Manufacturer_u8, + }, + } + } +} + +impl From<nitrokey_sys::NK_storage_status> for StorageStatus { + fn from(status: nitrokey_sys::NK_storage_status) -> Self { + StorageStatus { + unencrypted_volume: VolumeStatus { + read_only: status.unencrypted_volume_read_only, + active: status.unencrypted_volume_active, + }, + encrypted_volume: VolumeStatus { + read_only: status.encrypted_volume_read_only, + active: status.encrypted_volume_active, + }, + hidden_volume: VolumeStatus { + read_only: status.hidden_volume_read_only, + active: status.hidden_volume_active, + }, + firmware_version: FirmwareVersion { + major: status.firmware_version_major, + minor: status.firmware_version_minor, + }, + firmware_locked: status.firmware_locked, + serial_number_sd_card: status.serial_number_sd_card, + serial_number_smart_card: status.serial_number_smart_card, + user_retry_count: status.user_retry_count, + admin_retry_count: status.admin_retry_count, + new_sd_card_found: status.new_sd_card_found, + filled_with_random: status.filled_with_random, + stick_initialized: status.stick_initialized, + } + } +} diff --git a/src/device/wrapper.rs b/src/device/wrapper.rs new file mode 100644 index 0000000..69291ad --- /dev/null +++ b/src/device/wrapper.rs @@ -0,0 +1,141 @@ +// Copyright (C) 2018-2019 Robin Krahl <robin.krahl@ireas.org> +// SPDX-License-Identifier: MIT + +use crate::device::{Device, Model, Pro, Status, Storage}; +use crate::error::Error; +use crate::otp::GenerateOtp; + +/// A wrapper for a Nitrokey device of unknown type. +/// +/// Use the [`connect`][] method to obtain a wrapped instance. The wrapper implements all traits +/// that are shared between all Nitrokey devices so that the shared functionality can be used +/// without knowing the type of the underlying device. If you want to use functionality that is +/// not available for all devices, you have to extract the device. +/// +/// # Examples +/// +/// Authentication with error handling: +/// +/// ```no_run +/// use nitrokey::{Authenticate, DeviceWrapper, User}; +/// # use nitrokey::Error; +/// +/// fn perform_user_task<'a>(device: &User<'a, DeviceWrapper<'a>>) {} +/// fn perform_other_task(device: &DeviceWrapper) {} +/// +/// # fn try_main() -> Result<(), Error> { +/// let mut manager = nitrokey::take()?; +/// let device = manager.connect()?; +/// let device = match device.authenticate_user("123456") { +/// Ok(user) => { +/// perform_user_task(&user); +/// user.device() +/// }, +/// Err((device, err)) => { +/// eprintln!("Could not authenticate as user: {}", err); +/// device +/// }, +/// }; +/// perform_other_task(&device); +/// # Ok(()) +/// # } +/// ``` +/// +/// Device-specific commands: +/// +/// ```no_run +/// use nitrokey::{DeviceWrapper, Storage}; +/// # use nitrokey::Error; +/// +/// fn perform_common_task(device: &DeviceWrapper) {} +/// fn perform_storage_task(device: &Storage) {} +/// +/// # fn try_main() -> Result<(), Error> { +/// let mut manager = nitrokey::take()?; +/// let device = manager.connect()?; +/// perform_common_task(&device); +/// match device { +/// DeviceWrapper::Storage(storage) => perform_storage_task(&storage), +/// _ => (), +/// }; +/// # Ok(()) +/// # } +/// ``` +/// +/// [`connect`]: struct.Manager.html#method.connect +#[derive(Debug)] +pub enum DeviceWrapper<'a> { + /// A Nitrokey Storage device. + Storage(Storage<'a>), + /// A Nitrokey Pro device. + Pro(Pro<'a>), +} + +impl<'a> DeviceWrapper<'a> { + fn device(&self) -> &dyn Device<'a> { + match *self { + DeviceWrapper::Storage(ref storage) => storage, + DeviceWrapper::Pro(ref pro) => pro, + } + } + + fn device_mut(&mut self) -> &mut dyn Device<'a> { + match *self { + DeviceWrapper::Storage(ref mut storage) => storage, + DeviceWrapper::Pro(ref mut pro) => pro, + } + } +} + +impl<'a> From<Pro<'a>> for DeviceWrapper<'a> { + fn from(device: Pro<'a>) -> Self { + DeviceWrapper::Pro(device) + } +} + +impl<'a> From<Storage<'a>> for DeviceWrapper<'a> { + fn from(device: Storage<'a>) -> Self { + DeviceWrapper::Storage(device) + } +} + +impl<'a> GenerateOtp for DeviceWrapper<'a> { + fn get_hotp_slot_name(&self, slot: u8) -> Result<String, Error> { + self.device().get_hotp_slot_name(slot) + } + + fn get_totp_slot_name(&self, slot: u8) -> Result<String, Error> { + self.device().get_totp_slot_name(slot) + } + + fn get_hotp_code(&mut self, slot: u8) -> Result<String, Error> { + self.device_mut().get_hotp_code(slot) + } + + fn get_totp_code(&self, slot: u8) -> Result<String, Error> { + self.device().get_totp_code(slot) + } +} + +impl<'a> Device<'a> for DeviceWrapper<'a> { + fn into_manager(self) -> &'a mut crate::Manager { + match self { + DeviceWrapper::Pro(dev) => dev.into_manager(), + DeviceWrapper::Storage(dev) => dev.into_manager(), + } + } + + fn get_model(&self) -> Model { + match *self { + DeviceWrapper::Pro(_) => Model::Pro, + DeviceWrapper::Storage(_) => Model::Storage, + } + } + + fn get_status(&self) -> Result<Status, Error> { + match self { + DeviceWrapper::Pro(dev) => dev.get_status(), + DeviceWrapper::Storage(dev) => dev.get_status(), + } + } +} diff --git a/src/error.rs b/src/error.rs new file mode 100644 index 0000000..64a2ce0 --- /dev/null +++ b/src/error.rs @@ -0,0 +1,274 @@ +// Copyright (C) 2019 Robin Krahl <robin.krahl@ireas.org> +// SPDX-License-Identifier: MIT + +use std::error; +use std::fmt; +use std::os::raw; +use std::str; +use std::sync; + +use crate::device; + +/// An error returned by the nitrokey crate. +#[derive(Debug)] +pub enum Error { + /// An error reported by the Nitrokey device in the response packet. + CommandError(CommandError), + /// A device communication error. + CommunicationError(CommunicationError), + /// An error occurred due to concurrent access to the Nitrokey device. + ConcurrentAccessError, + /// A library usage error. + LibraryError(LibraryError), + /// An error that occurred due to a poisoned lock. + PoisonError, + /// An error that is caused by an unexpected value returned by libnitrokey. + UnexpectedError(String), + /// An unknown error returned by libnitrokey. + UnknownError(i64), + /// An error caused by a Nitrokey model that is not supported by this crate. + UnsupportedModelError, + /// An error occurred when interpreting a UTF-8 string. + Utf8Error(str::Utf8Error), +} + +impl From<raw::c_int> for Error { + fn from(code: raw::c_int) -> Self { + if let Some(err) = CommandError::try_from(code) { + Error::CommandError(err) + } else if let Some(err) = CommunicationError::try_from(256 - code) { + Error::CommunicationError(err) + } else if let Some(err) = LibraryError::try_from(code) { + Error::LibraryError(err) + } else { + Error::UnknownError(code.into()) + } + } +} + +impl From<CommandError> for Error { + fn from(err: CommandError) -> Self { + Error::CommandError(err) + } +} + +impl From<CommunicationError> for Error { + fn from(err: CommunicationError) -> Self { + Error::CommunicationError(err) + } +} + +impl From<LibraryError> for Error { + fn from(err: LibraryError) -> Self { + Error::LibraryError(err) + } +} + +impl From<str::Utf8Error> for Error { + fn from(error: str::Utf8Error) -> Self { + Error::Utf8Error(error) + } +} + +impl<T> From<sync::PoisonError<T>> for Error { + fn from(_error: sync::PoisonError<T>) -> Self { + Error::PoisonError + } +} + +impl<T> From<sync::TryLockError<T>> for Error { + fn from(error: sync::TryLockError<T>) -> Self { + match error { + sync::TryLockError::Poisoned(err) => err.into(), + sync::TryLockError::WouldBlock => Error::ConcurrentAccessError, + } + } +} + +impl<'a, T: device::Device<'a>> From<(T, Error)> for Error { + fn from((_, err): (T, Error)) -> Self { + err + } +} + +impl error::Error for Error {} + +impl fmt::Display for Error { + fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { + match *self { + Error::CommandError(ref err) => write!(f, "Command error: {}", err), + Error::CommunicationError(ref err) => write!(f, "Communication error: {}", err), + Error::ConcurrentAccessError => write!(f, "Internal error: concurrent access"), + Error::LibraryError(ref err) => write!(f, "Library error: {}", err), + Error::PoisonError => write!(f, "Internal error: poisoned lock"), + Error::UnexpectedError(ref s) => write!(f, "An unexpected error occurred: {}", s), + Error::UnknownError(ref err) => write!(f, "Unknown error: {}", err), + Error::UnsupportedModelError => write!(f, "Unsupported Nitrokey model"), + Error::Utf8Error(ref err) => write!(f, "UTF-8 error: {}", err), + } + } +} + +/// An error reported by the Nitrokey device in the response packet. +#[derive(Clone, Copy, Debug, PartialEq)] +pub enum CommandError { + /// A packet with a wrong checksum has been sent or received. + WrongCrc, + /// A command tried to access an OTP slot that does not exist. + WrongSlot, + /// A command tried to generate an OTP on a slot that is not configured. + SlotNotProgrammed, + /// The provided password is wrong. + WrongPassword, + /// You are not authorized for this command or provided a wrong temporary + /// password. + NotAuthorized, + /// An error occurred when getting or setting the time. + Timestamp, + /// You did not provide a name for the OTP slot. + NoName, + /// This command is not supported by this device. + NotSupported, + /// This command is unknown. + UnknownCommand, + /// AES decryption failed. + AesDecryptionFailed, +} + +impl CommandError { + fn try_from(value: raw::c_int) -> Option<Self> { + match value { + 1 => Some(CommandError::WrongCrc), + 2 => Some(CommandError::WrongSlot), + 3 => Some(CommandError::SlotNotProgrammed), + 4 => Some(CommandError::WrongPassword), + 5 => Some(CommandError::NotAuthorized), + 6 => Some(CommandError::Timestamp), + 7 => Some(CommandError::NoName), + 8 => Some(CommandError::NotSupported), + 9 => Some(CommandError::UnknownCommand), + 10 => Some(CommandError::AesDecryptionFailed), + _ => None, + } + } +} + +impl error::Error for CommandError {} + +impl fmt::Display for CommandError { + fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { + f.write_str(match *self { + CommandError::WrongCrc => "A packet with a wrong checksum has been sent or received", + CommandError::WrongSlot => "The given slot does not exist", + CommandError::SlotNotProgrammed => "The given slot is not programmed", + CommandError::WrongPassword => "The given password is wrong", + CommandError::NotAuthorized => { + "You are not authorized for this command or provided a wrong temporary \ + password" + } + CommandError::Timestamp => "An error occurred when getting or setting the time", + CommandError::NoName => "You did not provide a name for the slot", + CommandError::NotSupported => "This command is not supported by this device", + CommandError::UnknownCommand => "This command is unknown", + CommandError::AesDecryptionFailed => "AES decryption failed", + }) + } +} + +/// A device communication error. +#[derive(Clone, Copy, Debug, PartialEq)] +pub enum CommunicationError { + /// Could not connect to a Nitrokey device. + NotConnected, + /// Sending a packet failed. + SendingFailure, + /// Receiving a packet failed. + ReceivingFailure, + /// A packet with a wrong checksum was received. + InvalidCrc, +} + +impl CommunicationError { + fn try_from(value: raw::c_int) -> Option<Self> { + match value { + 2 => Some(CommunicationError::NotConnected), + 3 => Some(CommunicationError::SendingFailure), + 4 => Some(CommunicationError::ReceivingFailure), + 5 => Some(CommunicationError::InvalidCrc), + _ => None, + } + } +} + +impl error::Error for CommunicationError {} + +impl fmt::Display for CommunicationError { + fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { + f.write_str(match *self { + CommunicationError::NotConnected => "Could not connect to a Nitrokey device", + CommunicationError::SendingFailure => "Sending a packet failed", + CommunicationError::ReceivingFailure => "Receiving a packet failed", + CommunicationError::InvalidCrc => "A packet with a wrong checksum was received", + }) + } +} + +/// A library usage error. +#[derive(Clone, Copy, Debug, PartialEq)] +pub enum LibraryError { + /// A supplied string exceeded a length limit. + StringTooLong, + /// You passed an invalid slot. + InvalidSlot, + /// The supplied string was not in hexadecimal format. + InvalidHexString, + /// The target buffer was smaller than the source. + TargetBufferTooSmall, + /// You passed a string containing a null byte. + InvalidString, +} + +impl LibraryError { + fn try_from(value: raw::c_int) -> Option<Self> { + match value { + 200 => Some(LibraryError::StringTooLong), + 201 => Some(LibraryError::InvalidSlot), + 202 => Some(LibraryError::InvalidHexString), + 203 => Some(LibraryError::TargetBufferTooSmall), + _ => None, + } + } +} + +impl error::Error for LibraryError {} + +impl fmt::Display for LibraryError { + fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { + f.write_str(match *self { + LibraryError::StringTooLong => "The supplied string is too long", + LibraryError::InvalidSlot => "The given slot is invalid", + LibraryError::InvalidHexString => "The supplied string is not in hexadecimal format", + LibraryError::TargetBufferTooSmall => "The target buffer is too small", + LibraryError::InvalidString => "You passed a string containing a null byte", + }) + } +} + +// build our own static assertion that Error implements error::Error, Send, Sync, 'static + +struct Helper<T>(T); + +trait Assert { + fn assert() -> bool; +} + +impl<T: error::Error + Send + Sync + 'static> Assert for Helper<T> { + fn assert() -> bool { + true + } +} + +#[allow(unused)] +fn assert_error_impl() { + let _ = Helper::<Error>::assert(); +} @@ -1,3 +1,6 @@ +// Copyright (C) 2018-2019 Robin Krahl <robin.krahl@ireas.org> +// SPDX-License-Identifier: MIT + //! Provides access to a Nitrokey device using the native libnitrokey API. //! //! # Usage @@ -6,29 +9,46 @@ //! performed without authentication, some require user access, and some require admin access. //! This is modelled using the types [`User`][] and [`Admin`][]. //! -//! Use [`connect`][] to connect to any Nitrokey device. The method will return a +//! You can only connect to one Nitrokey at a time. Use the global [`take`][] function to obtain +//! an reference to the [`Manager`][] singleton that keeps track of the connections. Then use the +//! [`connect`][] method to connect to any Nitrokey device. The method will return a //! [`DeviceWrapper`][] that abstracts over the supported Nitrokey devices. You can also use -//! [`Pro::connect`][] or [`Storage::connect`][] to connect to a specific device. +//! [`connect_model`][], [`connect_pro`][] or [`connect_storage`][] to connect to a specific +//! device. +//! +//! To get a list of all connected Nitrokey devices, use the [`list_devices`][] function. You can +//! then connect to one of the connected devices using the [`connect_path`][] function of the +//! `Manager` struct. //! -//! You can then use [`authenticate_user`][] or [`authenticate_admin`][] to get an authenticated -//! device that can perform operations that require authentication. You can use [`device`][] to go -//! back to the unauthenticated device. +//! You can call [`authenticate_user`][] or [`authenticate_admin`][] to get an authenticated device +//! that can perform operations that require authentication. You can use [`device`][] to go back +//! to the unauthenticated device. //! //! This makes sure that you can only execute a command if you have the required access rights. //! Otherwise, your code will not compile. The only exception are the methods to generate one-time //! passwords – [`get_hotp_code`][] and [`get_totp_code`][]. Depending on the stick configuration, //! these operations are available without authentication or with user authentication. //! +//! # Background operations +//! +//! Some commands may start background operations. During such an operation, every new command +//! will cause a [`WrongCrc`][] error. To check whether a background operation is currently +//! running, use the [`get_operation_status`][] method. +//! +//! Background operations are only available on the Nitrokey Storage. Currently, +//! [`fill_sd_card`][] is the only command that triggers a background operation. +//! //! # Examples //! //! Connect to any Nitrokey and print its serial number: //! //! ```no_run //! use nitrokey::Device; -//! # use nitrokey::CommandError; +//! # use nitrokey::Error; //! -//! # fn try_main() -> Result<(), CommandError> { -//! let device = nitrokey::connect()?; +//! # fn try_main() -> Result<(), Error> { +//! let mut manager = nitrokey::take()?; +//! let device = manager.connect()?; //! println!("{}", device.get_serial_number()?); //! # Ok(()) //! # } @@ -38,19 +58,20 @@ //! //! ```no_run //! use nitrokey::{Authenticate, ConfigureOtp, OtpMode, OtpSlotData}; -//! # use nitrokey::CommandError; +//! # use nitrokey::Error; //! -//! # fn try_main() -> Result<(), (CommandError)> { -//! let device = nitrokey::connect()?; +//! # fn try_main() -> Result<(), Error> { +//! let mut manager = nitrokey::take()?; +//! let device = manager.connect()?; //! let slot_data = OtpSlotData::new(1, "test", "01234567890123456689", OtpMode::SixDigits); //! match device.authenticate_admin("12345678") { -//! Ok(admin) => { +//! Ok(mut admin) => { //! match admin.write_hotp_slot(slot_data, 0) { //! Ok(()) => println!("Successfully wrote slot."), -//! Err(err) => println!("Could not write slot: {}", err), +//! Err(err) => eprintln!("Could not write slot: {}", err), //! } //! }, -//! Err((_, err)) => println!("Could not authenticate as admin: {}", err), +//! Err((_, err)) => eprintln!("Could not authenticate as admin: {}", err), //! } //! # Ok(()) //! # } @@ -60,13 +81,14 @@ //! //! ```no_run //! use nitrokey::{Device, GenerateOtp}; -//! # use nitrokey::CommandError; +//! # use nitrokey::Error; //! -//! # fn try_main() -> Result<(), (CommandError)> { -//! let device = nitrokey::connect()?; +//! # fn try_main() -> Result<(), Error> { +//! let mut manager = nitrokey::take()?; +//! let mut device = manager.connect()?; //! match device.get_hotp_code(1) { //! Ok(code) => println!("Generated HOTP code: {}", code), -//! Err(err) => println!("Could not generate HOTP code: {}", err), +//! Err(err) => eprintln!("Could not generate HOTP code: {}", err), //! } //! # Ok(()) //! # } @@ -74,36 +96,64 @@ //! //! [`authenticate_admin`]: trait.Authenticate.html#method.authenticate_admin //! [`authenticate_user`]: trait.Authenticate.html#method.authenticate_user -//! [`connect`]: fn.connect.html -//! [`Pro::connect`]: struct.Pro.html#fn.connect.html -//! [`Storage::connect`]: struct.Storage.html#fn.connect.html +//! [`take`]: fn.take.html +//! [`connect`]: struct.Manager.html#method.connect +//! [`connect_model`]: struct.Manager.html#method.connect_model +//! [`connect_path`]: struct.Manager.html#method.connect_path +//! [`connect_pro`]: struct.Manager.html#method.connect_pro +//! [`connect_storage`]: struct.Manager.html#method.connect_storage +//! [`fill_sd_card`]: struct.Storage.html#method.fill_sd_card +//! [`get_operation_status`]: struct.Storage.html#method.get_operation_status +//! [`list_devices`]: fn.list_devices.html +//! [`manager`]: trait.Device.html#method.manager //! [`device`]: struct.User.html#method.device //! [`get_hotp_code`]: trait.GenerateOtp.html#method.get_hotp_code //! [`get_totp_code`]: trait.GenerateOtp.html#method.get_totp_code //! [`Admin`]: struct.Admin.html //! [`DeviceWrapper`]: enum.DeviceWrapper.html //! [`User`]: struct.User.html +//! [`WrongCrc`]: enum.CommandError.html#variant.WrongCrc #![warn(missing_docs, rust_2018_compatibility, rust_2018_idioms, unused)] +#[macro_use(lazy_static)] +extern crate lazy_static; + mod auth; mod config; mod device; +mod error; mod otp; mod pws; mod util; -use nitrokey_sys; +use std::convert::TryInto as _; +use std::fmt; +use std::marker; +use std::ptr::NonNull; +use std::sync; pub use crate::auth::{Admin, Authenticate, User}; pub use crate::config::Config; pub use crate::device::{ - connect, connect_model, Device, DeviceWrapper, Model, Pro, SdCardData, Storage, - StorageProductionInfo, StorageStatus, VolumeMode, VolumeStatus, + Device, DeviceInfo, DeviceWrapper, Model, OperationStatus, Pro, SdCardData, SerialNumber, + Status, Storage, StorageProductionInfo, StorageStatus, VolumeMode, VolumeStatus, }; +pub use crate::error::{CommandError, CommunicationError, Error, LibraryError}; pub use crate::otp::{ConfigureOtp, GenerateOtp, OtpMode, OtpSlotData}; pub use crate::pws::{GetPasswordSafe, PasswordSafe, SLOT_COUNT}; -pub use crate::util::{CommandError, LogLevel}; +pub use crate::util::LogLevel; + +use crate::util::{get_cstring, get_last_result}; + +/// The default admin PIN for all Nitrokey devices. +pub const DEFAULT_ADMIN_PIN: &str = "12345678"; +/// The default user PIN for all Nitrokey devices. +pub const DEFAULT_USER_PIN: &str = "123456"; + +lazy_static! { + static ref MANAGER: sync::Mutex<Manager> = sync::Mutex::new(Manager::new()); +} /// A version of the libnitrokey library. /// @@ -125,6 +175,372 @@ pub struct Version { pub minor: u32, } +impl fmt::Display for Version { + fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { + if self.git.is_empty() { + write!(f, "v{}.{}", self.major, self.minor) + } else { + f.write_str(&self.git) + } + } +} + +/// A manager for connections to Nitrokey devices. +/// +/// Currently, libnitrokey only provides access to one Nitrokey device at the same time. This +/// manager struct makes sure that `nitrokey-rs` does not try to connect to two devices at the same +/// time. +/// +/// To obtain a reference to an instance of this manager, use the [`take`][] function. Use one of +/// the connect methods – [`connect`][], [`connect_model`][], [`connect_pro`][] or +/// [`connect_storage`][] – to retrieve a [`Device`][] instance. +/// +/// # Examples +/// +/// Connect to a single device: +/// +/// ```no_run +/// use nitrokey::Device; +/// # use nitrokey::Error; +/// +/// # fn try_main() -> Result<(), Error> { +/// let mut manager = nitrokey::take()?; +/// let device = manager.connect()?; +/// println!("{}", device.get_serial_number()?); +/// # Ok(()) +/// # } +/// ``` +/// +/// Connect to a Pro and a Storage device: +/// +/// ```no_run +/// use nitrokey::{Device, Model}; +/// # use nitrokey::Error; +/// +/// # fn try_main() -> Result<(), Error> { +/// let mut manager = nitrokey::take()?; +/// let device = manager.connect_model(Model::Pro)?; +/// println!("Pro: {}", device.get_serial_number()?); +/// drop(device); +/// let device = manager.connect_model(Model::Storage)?; +/// println!("Storage: {}", device.get_serial_number()?); +/// # Ok(()) +/// # } +/// ``` +/// +/// [`connect`]: #method.connect +/// [`connect_model`]: #method.connect_model +/// [`connect_pro`]: #method.connect_pro +/// [`connect_storage`]: #method.connect_storage +/// [`manager`]: trait.Device.html#method.manager +/// [`take`]: fn.take.html +/// [`Device`]: trait.Device.html +#[derive(Debug)] +pub struct Manager { + marker: marker::PhantomData<()>, +} + +impl Manager { + fn new() -> Self { + Manager { + marker: marker::PhantomData, + } + } + + /// Connects to a Nitrokey device. + /// + /// This method can be used to connect to any connected device, both a Nitrokey Pro and a + /// Nitrokey Storage. + /// + /// # Errors + /// + /// - [`NotConnected`][] if no Nitrokey device is connected + /// - [`UnsupportedModelError`][] if the Nitrokey device is not supported by this crate + /// + /// # Example + /// + /// ``` + /// use nitrokey::DeviceWrapper; + /// + /// fn do_something(device: DeviceWrapper) {} + /// + /// let mut manager = nitrokey::take()?; + /// match manager.connect() { + /// Ok(device) => do_something(device), + /// Err(err) => println!("Could not connect to a Nitrokey: {}", err), + /// } + /// # Ok::<(), nitrokey::Error>(()) + /// ``` + /// + /// [`NotConnected`]: enum.CommunicationError.html#variant.NotConnected + /// [`UnsupportedModelError`]: enum.Error.html#variant.UnsupportedModelError + pub fn connect(&mut self) -> Result<DeviceWrapper<'_>, Error> { + if unsafe { nitrokey_sys::NK_login_auto() } == 1 { + device::get_connected_device(self) + } else { + Err(CommunicationError::NotConnected.into()) + } + } + + /// Connects to a Nitrokey device of the given model. + /// + /// # Errors + /// + /// - [`NotConnected`][] if no Nitrokey device of the given model is connected + /// + /// # Example + /// + /// ``` + /// use nitrokey::DeviceWrapper; + /// use nitrokey::Model; + /// + /// fn do_something(device: DeviceWrapper) {} + /// + /// match nitrokey::take()?.connect_model(Model::Pro) { + /// Ok(device) => do_something(device), + /// Err(err) => println!("Could not connect to a Nitrokey Pro: {}", err), + /// } + /// # Ok::<(), nitrokey::Error>(()) + /// ``` + /// + /// [`NotConnected`]: enum.CommunicationError.html#variant.NotConnected + pub fn connect_model(&mut self, model: Model) -> Result<DeviceWrapper<'_>, Error> { + if device::connect_enum(model) { + Ok(device::create_device_wrapper(self, model)) + } else { + Err(CommunicationError::NotConnected.into()) + } + } + + /// Connects to a Nitrokey device at the given USB path. + /// + /// To get a list of all connected Nitrokey devices, use the [`list_devices`][] function. The + /// [`DeviceInfo`][] structs returned by that function contain the USB path in the `path` + /// field. + /// + /// # Errors + /// + /// - [`InvalidString`][] if the USB path contains a null byte + /// - [`NotConnected`][] if no Nitrokey device can be found at the given USB path + /// - [`UnsupportedModelError`][] if the model of the Nitrokey device at the given USB path is + /// not supported by this crate + /// + /// # Example + /// + /// ``` + /// use nitrokey::DeviceWrapper; + /// + /// fn use_device(device: DeviceWrapper) {} + /// + /// let mut manager = nitrokey::take()?; + /// let devices = nitrokey::list_devices()?; + /// for device in devices { + /// let device = manager.connect_path(device.path)?; + /// use_device(device); + /// } + /// # Ok::<(), nitrokey::Error>(()) + /// ``` + /// + /// [`list_devices`]: fn.list_devices.html + /// [`DeviceInfo`]: struct.DeviceInfo.html + /// [`InvalidString`]: enum.LibraryError.html#variant.InvalidString + /// [`NotConnected`]: enum.CommunicationError.html#variant.NotConnected + /// [`UnsupportedModelError`]: enum.Error.html#variant.UnsupportedModelError + pub fn connect_path<S: Into<Vec<u8>>>(&mut self, path: S) -> Result<DeviceWrapper<'_>, Error> { + let path = get_cstring(path)?; + if unsafe { nitrokey_sys::NK_connect_with_path(path.as_ptr()) } == 1 { + device::get_connected_device(self) + } else { + Err(CommunicationError::NotConnected.into()) + } + } + + /// Connects to a Nitrokey Pro. + /// + /// # Errors + /// + /// - [`NotConnected`][] if no Nitrokey device of the given model is connected + /// + /// # Example + /// + /// ``` + /// use nitrokey::Pro; + /// + /// fn use_pro(device: Pro) {} + /// + /// match nitrokey::take()?.connect_pro() { + /// Ok(device) => use_pro(device), + /// Err(err) => println!("Could not connect to the Nitrokey Pro: {}", err), + /// } + /// # Ok::<(), nitrokey::Error>(()) + /// ``` + /// + /// [`NotConnected`]: enum.CommunicationError.html#variant.NotConnected + pub fn connect_pro(&mut self) -> Result<Pro<'_>, Error> { + if device::connect_enum(device::Model::Pro) { + Ok(device::Pro::new(self)) + } else { + Err(CommunicationError::NotConnected.into()) + } + } + + /// Connects to a Nitrokey Storage. + /// + /// # Errors + /// + /// - [`NotConnected`][] if no Nitrokey device of the given model is connected + /// + /// # Example + /// + /// ``` + /// use nitrokey::Storage; + /// + /// fn use_storage(device: Storage) {} + /// + /// match nitrokey::take()?.connect_storage() { + /// Ok(device) => use_storage(device), + /// Err(err) => println!("Could not connect to the Nitrokey Storage: {}", err), + /// } + /// # Ok::<(), nitrokey::Error>(()) + /// ``` + /// + /// [`NotConnected`]: enum.CommunicationError.html#variant.NotConnected + pub fn connect_storage(&mut self) -> Result<Storage<'_>, Error> { + if device::connect_enum(Model::Storage) { + Ok(Storage::new(self)) + } else { + Err(CommunicationError::NotConnected.into()) + } + } +} + +/// Take an instance of the connection manager, blocking until an instance is available. +/// +/// There may only be one [`Manager`][] instance at the same time. If there already is an +/// instance, this method blocks. If you want a non-blocking version, use [`take`][]. +/// +/// # Errors +/// +/// - [`PoisonError`][] if the lock is poisoned +/// +/// [`take`]: fn.take.html +/// [`PoisonError`]: struct.Error.html#variant.PoisonError +/// [`Manager`]: struct.Manager.html +pub fn take_blocking() -> Result<sync::MutexGuard<'static, Manager>, Error> { + MANAGER.lock().map_err(Into::into) +} + +/// Try to take an instance of the connection manager. +/// +/// There may only be one [`Manager`][] instance at the same time. If there already is an +/// instance, a [`ConcurrentAccessError`][] is returned. If you want a blocking version, use +/// [`take_blocking`][]. If you want to access the manager instance even if the cache is poisoned, +/// use [`force_take`][]. +/// +/// # Errors +/// +/// - [`ConcurrentAccessError`][] if the token for the `Manager` instance cannot be locked +/// - [`PoisonError`][] if the lock is poisoned +/// +/// [`take_blocking`]: fn.take_blocking.html +/// [`force_take`]: fn.force_take.html +/// [`ConcurrentAccessError`]: struct.Error.html#variant.ConcurrentAccessError +/// [`PoisonError`]: struct.Error.html#variant.PoisonError +/// [`Manager`]: struct.Manager.html +pub fn take() -> Result<sync::MutexGuard<'static, Manager>, Error> { + MANAGER.try_lock().map_err(Into::into) +} + +/// Try to take an instance of the connection manager, ignoring a poisoned cache. +/// +/// There may only be one [`Manager`][] instance at the same time. If there already is an +/// instance, a [`ConcurrentAccessError`][] is returned. If you want a blocking version, use +/// [`take_blocking`][]. +/// +/// If a thread has previously panicked while accessing the manager instance, the cache is +/// poisoned. The default implementation, [`take`][], returns a [`PoisonError`][] on subsequent +/// calls. This implementation ignores the poisoned cache and returns the manager instance. +/// +/// # Errors +/// +/// - [`ConcurrentAccessError`][] if the token for the `Manager` instance cannot be locked +/// +/// [`take`]: fn.take.html +/// [`take_blocking`]: fn.take_blocking.html +/// [`ConcurrentAccessError`]: struct.Error.html#variant.ConcurrentAccessError +/// [`Manager`]: struct.Manager.html +pub fn force_take() -> Result<sync::MutexGuard<'static, Manager>, Error> { + MANAGER.try_lock().or_else(|err| match err { + sync::TryLockError::Poisoned(err) => Ok(err.into_inner()), + sync::TryLockError::WouldBlock => Err(Error::ConcurrentAccessError), + }) +} + +/// List all connected Nitrokey devices. +/// +/// This functions returns a vector with [`DeviceInfo`][] structs that contain information about +/// all connected Nitrokey devices. It will even list unsupported models, although you cannot +/// connect to them. To connect to a supported model, call the [`connect_path`][] function. +/// +/// # Errors +/// +/// - [`NotConnected`][] if a Nitrokey device has been disconnected during enumeration +/// - [`Utf8Error`][] if the USB path or the serial number returned by libnitrokey are invalid +/// UTF-8 strings +/// +/// # Example +/// +/// ``` +/// let devices = nitrokey::list_devices()?; +/// if devices.is_empty() { +/// println!("No connected Nitrokey devices found."); +/// } else { +/// println!("model\tpath\tserial number"); +/// for device in devices { +/// match device.model { +/// Some(model) => print!("{}", model), +/// None => print!("unsupported"), +/// } +/// print!("\t{}\t", device.path); +/// match device.serial_number { +/// Some(serial_number) => println!("{}", serial_number), +/// None => println!("unknown"), +/// } +/// } +/// } +/// # Ok::<(), nitrokey::Error>(()) +/// ``` +/// +/// [`connect_path`]: struct.Manager.html#fn.connect_path +/// [`DeviceInfo`]: struct.DeviceInfo.html +/// [`NotConnected`]: enum.CommunicationError.html#variant.NotConnected +/// [`Utf8Error`]: enum.Error.html#variant.Utf8Error +pub fn list_devices() -> Result<Vec<DeviceInfo>, Error> { + let ptr = NonNull::new(unsafe { nitrokey_sys::NK_list_devices() }); + match ptr { + Some(mut ptr) => { + let mut vec: Vec<DeviceInfo> = Vec::new(); + push_device_info(&mut vec, unsafe { ptr.as_ref() })?; + unsafe { + nitrokey_sys::NK_free_device_info(ptr.as_mut()); + } + Ok(vec) + } + None => get_last_result().map(|_| Vec::new()), + } +} + +fn push_device_info( + vec: &mut Vec<DeviceInfo>, + info: &nitrokey_sys::NK_device_info, +) -> Result<(), Error> { + vec.push(info.try_into()?); + if let Some(ptr) = NonNull::new(info.next) { + push_device_info(vec, unsafe { ptr.as_ref() })?; + } + Ok(()) +} + /// Enables or disables debug output. Calling this method with `true` is equivalent to setting the /// log level to `Debug`; calling it with `false` is equivalent to the log level `Error` (see /// [`set_log_level`][]). @@ -149,21 +565,28 @@ pub fn set_log_level(level: LogLevel) { /// Returns the libnitrokey library version. /// +/// # Errors +/// +/// - [`Utf8Error`][] if libnitrokey returned an invalid UTF-8 string +/// /// # Example /// /// ``` -/// let version = nitrokey::get_library_version(); +/// let version = nitrokey::get_library_version()?; /// println!("Using libnitrokey {}", version.git); +/// # Ok::<(), nitrokey::Error>(()) /// ``` -pub fn get_library_version() -> Version { +/// +/// [`Utf8Error`]: enum.Error.html#variant.Utf8Error +pub fn get_library_version() -> Result<Version, Error> { // NK_get_library_version returns a static string, so we don’t have to free the pointer. let git = unsafe { nitrokey_sys::NK_get_library_version() }; let git = if git.is_null() { String::new() } else { - util::owned_str_from_ptr(git) + util::owned_str_from_ptr(git)? }; let major = unsafe { nitrokey_sys::NK_get_major_library_version() }; let minor = unsafe { nitrokey_sys::NK_get_minor_library_version() }; - Version { git, major, minor } + Ok(Version { git, major, minor }) } @@ -1,8 +1,10 @@ -use std::ffi::CString; +// Copyright (C) 2018-2019 Robin Krahl <robin.krahl@ireas.org> +// SPDX-License-Identifier: MIT -use nitrokey_sys; +use std::ffi::CString; -use crate::util::{get_command_result, get_cstring, result_from_string, CommandError}; +use crate::error::Error; +use crate::util::{get_command_result, get_cstring, result_from_string}; /// Modes for one-time password generation. #[derive(Clone, Copy, Debug, PartialEq)] @@ -28,28 +30,29 @@ pub trait ConfigureOtp { /// /// ```no_run /// use nitrokey::{Authenticate, ConfigureOtp, OtpMode, OtpSlotData}; - /// # use nitrokey::CommandError; + /// # use nitrokey::Error; /// - /// # fn try_main() -> Result<(), (CommandError)> { - /// let device = nitrokey::connect()?; + /// # fn try_main() -> Result<(), Error> { + /// let mut manager = nitrokey::take()?; + /// let device = manager.connect()?; /// let slot_data = OtpSlotData::new(1, "test", "01234567890123456689", OtpMode::SixDigits); /// match device.authenticate_admin("12345678") { - /// Ok(admin) => { + /// Ok(mut admin) => { /// match admin.write_hotp_slot(slot_data, 0) { /// Ok(()) => println!("Successfully wrote slot."), - /// Err(err) => println!("Could not write slot: {}", err), + /// Err(err) => eprintln!("Could not write slot: {}", err), /// } /// }, - /// Err((_, err)) => println!("Could not authenticate as admin: {}", err), + /// Err((_, err)) => eprintln!("Could not authenticate as admin: {}", err), /// } /// # Ok(()) /// # } /// ``` /// - /// [`InvalidSlot`]: enum.CommandError.html#variant.InvalidSlot - /// [`InvalidString`]: enum.CommandError.html#variant.InvalidString + /// [`InvalidSlot`]: enum.LibraryError.html#variant.InvalidSlot + /// [`InvalidString`]: enum.LibraryError.html#variant.InvalidString /// [`NoName`]: enum.CommandError.html#variant.NoName - fn write_hotp_slot(&self, data: OtpSlotData, counter: u64) -> Result<(), CommandError>; + fn write_hotp_slot(&mut self, data: OtpSlotData, counter: u64) -> Result<(), Error>; /// Configure a TOTP slot with the given data and set the TOTP time window to the given value /// (default 30). @@ -64,28 +67,29 @@ pub trait ConfigureOtp { /// /// ```no_run /// use nitrokey::{Authenticate, ConfigureOtp, OtpMode, OtpSlotData}; - /// # use nitrokey::CommandError; + /// # use nitrokey::Error; /// - /// # fn try_main() -> Result<(), (CommandError)> { - /// let device = nitrokey::connect()?; + /// # fn try_main() -> Result<(), Error> { + /// let mut manager = nitrokey::take()?; + /// let device = manager.connect()?; /// let slot_data = OtpSlotData::new(1, "test", "01234567890123456689", OtpMode::EightDigits); /// match device.authenticate_admin("12345678") { - /// Ok(admin) => { + /// Ok(mut admin) => { /// match admin.write_totp_slot(slot_data, 30) { /// Ok(()) => println!("Successfully wrote slot."), - /// Err(err) => println!("Could not write slot: {}", err), + /// Err(err) => eprintln!("Could not write slot: {}", err), /// } /// }, - /// Err((_, err)) => println!("Could not authenticate as admin: {}", err), + /// Err((_, err)) => eprintln!("Could not authenticate as admin: {}", err), /// } /// # Ok(()) /// # } /// ``` /// - /// [`InvalidSlot`]: enum.CommandError.html#variant.InvalidSlot - /// [`InvalidString`]: enum.CommandError.html#variant.InvalidString + /// [`InvalidSlot`]: enum.LibraryError.html#variant.InvalidSlot + /// [`InvalidString`]: enum.LibraryError.html#variant.InvalidString /// [`NoName`]: enum.CommandError.html#variant.NoName - fn write_totp_slot(&self, data: OtpSlotData, time_window: u16) -> Result<(), CommandError>; + fn write_totp_slot(&mut self, data: OtpSlotData, time_window: u16) -> Result<(), Error>; /// Erases an HOTP slot. /// @@ -97,25 +101,26 @@ pub trait ConfigureOtp { /// /// ```no_run /// use nitrokey::{Authenticate, ConfigureOtp}; - /// # use nitrokey::CommandError; + /// # use nitrokey::Error; /// - /// # fn try_main() -> Result<(), (CommandError)> { - /// let device = nitrokey::connect()?; + /// # fn try_main() -> Result<(), Error> { + /// let mut manager = nitrokey::take()?; + /// let device = manager.connect()?; /// match device.authenticate_admin("12345678") { - /// Ok(admin) => { + /// Ok(mut admin) => { /// match admin.erase_hotp_slot(1) { /// Ok(()) => println!("Successfully erased slot."), - /// Err(err) => println!("Could not erase slot: {}", err), + /// Err(err) => eprintln!("Could not erase slot: {}", err), /// } /// }, - /// Err((_, err)) => println!("Could not authenticate as admin: {}", err), + /// Err((_, err)) => eprintln!("Could not authenticate as admin: {}", err), /// } /// # Ok(()) /// # } /// ``` /// - /// [`InvalidSlot`]: enum.CommandError.html#variant.InvalidSlot - fn erase_hotp_slot(&self, slot: u8) -> Result<(), CommandError>; + /// [`InvalidSlot`]: enum.LibraryError.html#variant.InvalidSlot + fn erase_hotp_slot(&mut self, slot: u8) -> Result<(), Error>; /// Erases a TOTP slot. /// @@ -127,25 +132,26 @@ pub trait ConfigureOtp { /// /// ```no_run /// use nitrokey::{Authenticate, ConfigureOtp}; - /// # use nitrokey::CommandError; + /// # use nitrokey::Error; /// - /// # fn try_main() -> Result<(), (CommandError)> { - /// let device = nitrokey::connect()?; + /// # fn try_main() -> Result<(), Error> { + /// let mut manager = nitrokey::take()?; + /// let device = manager.connect()?; /// match device.authenticate_admin("12345678") { - /// Ok(admin) => { + /// Ok(mut admin) => { /// match admin.erase_totp_slot(1) { /// Ok(()) => println!("Successfully erased slot."), - /// Err(err) => println!("Could not erase slot: {}", err), + /// Err(err) => eprintln!("Could not erase slot: {}", err), /// } /// }, - /// Err((_, err)) => println!("Could not authenticate as admin: {}", err), + /// Err((_, err)) => eprintln!("Could not authenticate as admin: {}", err), /// } /// # Ok(()) /// # } /// ``` /// - /// [`InvalidSlot`]: enum.CommandError.html#variant.InvalidSlot - fn erase_totp_slot(&self, slot: u8) -> Result<(), CommandError>; + /// [`InvalidSlot`]: enum.LibraryError.html#variant.InvalidSlot + fn erase_totp_slot(&mut self, slot: u8) -> Result<(), Error>; } /// Provides methods to generate OTP codes and to query OTP slots on a Nitrokey @@ -164,14 +170,15 @@ pub trait GenerateOtp { /// ```no_run /// use std::time; /// use nitrokey::GenerateOtp; - /// # use nitrokey::CommandError; + /// # use nitrokey::Error; /// - /// # fn try_main() -> Result<(), CommandError> { - /// let device = nitrokey::connect()?; + /// # fn try_main() -> Result<(), Error> { + /// let mut manager = nitrokey::take()?; + /// let mut device = manager.connect()?; /// let time = time::SystemTime::now().duration_since(time::UNIX_EPOCH); /// match time { /// Ok(time) => device.set_time(time.as_secs(), false)?, - /// Err(_) => println!("The system time is before the Unix epoch!"), + /// Err(_) => eprintln!("The system time is before the Unix epoch!"), /// } /// # Ok(()) /// # } @@ -183,7 +190,7 @@ pub trait GenerateOtp { /// /// [`get_totp_code`]: #method.get_totp_code /// [`Timestamp`]: enum.CommandError.html#variant.Timestamp - fn set_time(&self, time: u64, force: bool) -> Result<(), CommandError> { + fn set_time(&mut self, time: u64, force: bool) -> Result<(), Error> { let result = if force { unsafe { nitrokey_sys::NK_totp_set_time(time) } } else { @@ -202,23 +209,24 @@ pub trait GenerateOtp { /// # Example /// /// ```no_run - /// use nitrokey::{CommandError, GenerateOtp}; + /// use nitrokey::{CommandError, Error, GenerateOtp}; /// - /// # fn try_main() -> Result<(), CommandError> { - /// let device = nitrokey::connect()?; + /// # fn try_main() -> Result<(), Error> { + /// let mut manager = nitrokey::take()?; + /// let device = manager.connect()?; /// match device.get_hotp_slot_name(1) { /// Ok(name) => println!("HOTP slot 1: {}", name), - /// Err(CommandError::SlotNotProgrammed) => println!("HOTP slot 1 not programmed"), - /// Err(err) => println!("Could not get slot name: {}", err), + /// Err(Error::CommandError(CommandError::SlotNotProgrammed)) => eprintln!("HOTP slot 1 not programmed"), + /// Err(err) => eprintln!("Could not get slot name: {}", err), /// }; /// # Ok(()) /// # } /// ``` /// - /// [`InvalidSlot`]: enum.CommandError.html#variant.InvalidSlot + /// [`InvalidSlot`]: enum.LibraryError.html#variant.InvalidSlot /// [`SlotNotProgrammed`]: enum.CommandError.html#variant.SlotNotProgrammed - fn get_hotp_slot_name(&self, slot: u8) -> Result<String, CommandError> { - unsafe { result_from_string(nitrokey_sys::NK_get_hotp_slot_name(slot)) } + fn get_hotp_slot_name(&self, slot: u8) -> Result<String, Error> { + result_from_string(unsafe { nitrokey_sys::NK_get_hotp_slot_name(slot) }) } /// Returns the name of the given TOTP slot. @@ -231,23 +239,24 @@ pub trait GenerateOtp { /// # Example /// /// ```no_run - /// use nitrokey::{CommandError, GenerateOtp}; + /// use nitrokey::{CommandError, Error, GenerateOtp}; /// - /// # fn try_main() -> Result<(), CommandError> { - /// let device = nitrokey::connect()?; + /// # fn try_main() -> Result<(), Error> { + /// let mut manager = nitrokey::take()?; + /// let device = manager.connect()?; /// match device.get_totp_slot_name(1) { /// Ok(name) => println!("TOTP slot 1: {}", name), - /// Err(CommandError::SlotNotProgrammed) => println!("TOTP slot 1 not programmed"), - /// Err(err) => println!("Could not get slot name: {}", err), + /// Err(Error::CommandError(CommandError::SlotNotProgrammed)) => eprintln!("TOTP slot 1 not programmed"), + /// Err(err) => eprintln!("Could not get slot name: {}", err), /// }; /// # Ok(()) /// # } /// ``` /// - /// [`InvalidSlot`]: enum.CommandError.html#variant.InvalidSlot + /// [`InvalidSlot`]: enum.LibraryError.html#variant.InvalidSlot /// [`SlotNotProgrammed`]: enum.CommandError.html#variant.SlotNotProgrammed - fn get_totp_slot_name(&self, slot: u8) -> Result<String, CommandError> { - unsafe { result_from_string(nitrokey_sys::NK_get_totp_slot_name(slot)) } + fn get_totp_slot_name(&self, slot: u8) -> Result<String, Error> { + result_from_string(unsafe { nitrokey_sys::NK_get_totp_slot_name(slot) }) } /// Generates an HOTP code on the given slot. This operation may require user authorization, @@ -263,10 +272,11 @@ pub trait GenerateOtp { /// /// ```no_run /// use nitrokey::GenerateOtp; - /// # use nitrokey::CommandError; + /// # use nitrokey::Error; /// - /// # fn try_main() -> Result<(), CommandError> { - /// let device = nitrokey::connect()?; + /// # fn try_main() -> Result<(), Error> { + /// let mut manager = nitrokey::take()?; + /// let mut device = manager.connect()?; /// let code = device.get_hotp_code(1)?; /// println!("Generated HOTP code on slot 1: {}", code); /// # Ok(()) @@ -274,13 +284,11 @@ pub trait GenerateOtp { /// ``` /// /// [`get_config`]: trait.Device.html#method.get_config - /// [`InvalidSlot`]: enum.CommandError.html#variant.InvalidSlot + /// [`InvalidSlot`]: enum.LibraryError.html#variant.InvalidSlot /// [`NotAuthorized`]: enum.CommandError.html#variant.NotAuthorized /// [`SlotNotProgrammed`]: enum.CommandError.html#variant.SlotNotProgrammed - fn get_hotp_code(&self, slot: u8) -> Result<String, CommandError> { - unsafe { - return result_from_string(nitrokey_sys::NK_get_hotp_code(slot)); - } + fn get_hotp_code(&mut self, slot: u8) -> Result<String, Error> { + result_from_string(unsafe { nitrokey_sys::NK_get_hotp_code(slot) }) } /// Generates a TOTP code on the given slot. This operation may require user authorization, @@ -300,10 +308,11 @@ pub trait GenerateOtp { /// ```no_run /// use std::time; /// use nitrokey::GenerateOtp; - /// # use nitrokey::CommandError; + /// # use nitrokey::Error; /// - /// # fn try_main() -> Result<(), CommandError> { - /// let device = nitrokey::connect()?; + /// # fn try_main() -> Result<(), Error> { + /// let mut manager = nitrokey::take()?; + /// let mut device = manager.connect()?; /// let time = time::SystemTime::now().duration_since(time::UNIX_EPOCH); /// match time { /// Ok(time) => { @@ -311,7 +320,7 @@ pub trait GenerateOtp { /// let code = device.get_totp_code(1)?; /// println!("Generated TOTP code on slot 1: {}", code); /// }, - /// Err(_) => println!("Timestamps before 1970-01-01 are not supported!"), + /// Err(_) => eprintln!("Timestamps before 1970-01-01 are not supported!"), /// } /// # Ok(()) /// # } @@ -319,13 +328,11 @@ pub trait GenerateOtp { /// /// [`set_time`]: #method.set_time /// [`get_config`]: trait.Device.html#method.get_config - /// [`InvalidSlot`]: enum.CommandError.html#variant.InvalidSlot + /// [`InvalidSlot`]: enum.LibraryError.html#variant.InvalidSlot /// [`NotAuthorized`]: enum.CommandError.html#variant.NotAuthorized /// [`SlotNotProgrammed`]: enum.CommandError.html#variant.SlotNotProgrammed - fn get_totp_code(&self, slot: u8) -> Result<String, CommandError> { - unsafe { - return result_from_string(nitrokey_sys::NK_get_totp_code(slot, 0, 0, 0)); - } + fn get_totp_code(&self, slot: u8) -> Result<String, Error> { + result_from_string(unsafe { nitrokey_sys::NK_get_totp_code(slot, 0, 0, 0) }) } } @@ -395,7 +402,7 @@ impl OtpSlotData { } impl RawOtpSlotData { - pub fn new(data: OtpSlotData) -> Result<RawOtpSlotData, CommandError> { + pub fn new(data: OtpSlotData) -> Result<RawOtpSlotData, Error> { let name = get_cstring(data.name)?; let secret = get_cstring(data.secret)?; let use_token_id = data.token_id.is_some(); @@ -1,10 +1,9 @@ -use libc; -use nitrokey_sys; +// Copyright (C) 2018-2019 Robin Krahl <robin.krahl@ireas.org> +// SPDX-License-Identifier: MIT use crate::device::{Device, DeviceWrapper, Pro, Storage}; -use crate::util::{ - get_command_result, get_cstring, get_last_error, result_from_string, CommandError, -}; +use crate::error::{CommandError, Error}; +use crate::util::{get_command_result, get_cstring, get_last_error, result_from_string}; /// The number of slots in a [`PasswordSafe`][]. /// @@ -30,9 +29,9 @@ pub const SLOT_COUNT: u8 = 16; /// /// ```no_run /// use nitrokey::{Device, GetPasswordSafe, PasswordSafe}; -/// # use nitrokey::CommandError; +/// # use nitrokey::Error; /// -/// fn use_password_safe(pws: &PasswordSafe) -> Result<(), CommandError> { +/// fn use_password_safe(pws: &PasswordSafe) -> Result<(), Error> { /// let name = pws.get_slot_name(0)?; /// let login = pws.get_slot_login(0)?; /// let password = pws.get_slot_login(0)?; @@ -40,10 +39,12 @@ pub const SLOT_COUNT: u8 = 16; /// Ok(()) /// } /// -/// # fn try_main() -> Result<(), CommandError> { -/// let device = nitrokey::connect()?; +/// # fn try_main() -> Result<(), Error> { +/// let mut manager = nitrokey::take()?; +/// let mut device = manager.connect()?; /// let pws = device.get_password_safe("123456")?; /// use_password_safe(&pws); +/// drop(pws); /// device.lock()?; /// # Ok(()) /// # } @@ -53,8 +54,9 @@ pub const SLOT_COUNT: u8 = 16; /// [`get_password_safe`]: trait.GetPasswordSafe.html#method.get_password_safe /// [`lock`]: trait.Device.html#method.lock /// [`GetPasswordSafe`]: trait.GetPasswordSafe.html -pub struct PasswordSafe<'a> { - _device: &'a dyn Device, +#[derive(Debug)] +pub struct PasswordSafe<'a, 'b> { + _device: &'a dyn Device<'b>, } /// Provides access to a [`PasswordSafe`][]. @@ -63,7 +65,7 @@ pub struct PasswordSafe<'a> { /// retrieved from it. /// /// [`PasswordSafe`]: struct.PasswordSafe.html -pub trait GetPasswordSafe { +pub trait GetPasswordSafe<'a> { /// Enables and returns the password safe. /// /// The underlying device must always live at least as long as a password safe retrieved from @@ -89,19 +91,20 @@ pub trait GetPasswordSafe { /// /// ```no_run /// use nitrokey::{Device, GetPasswordSafe, PasswordSafe}; - /// # use nitrokey::CommandError; + /// # use nitrokey::Error; /// /// fn use_password_safe(pws: &PasswordSafe) {} /// - /// # fn try_main() -> Result<(), CommandError> { - /// let device = nitrokey::connect()?; + /// # fn try_main() -> Result<(), Error> { + /// let mut manager = nitrokey::take()?; + /// let mut device = manager.connect()?; /// match device.get_password_safe("123456") { /// Ok(pws) => { /// use_password_safe(&pws); - /// device.lock()?; /// }, - /// Err(err) => println!("Could not open the password safe: {}", err), + /// Err(err) => eprintln!("Could not open the password safe: {}", err), /// }; + /// device.lock()?; /// # Ok(()) /// # } /// ``` @@ -110,34 +113,30 @@ pub trait GetPasswordSafe { /// [`lock`]: trait.Device.html#method.lock /// [`AesDecryptionFailed`]: enum.CommandError.html#variant.AesDecryptionFailed /// [`Device::build_aes_key`]: trait.Device.html#method.build_aes_key - /// [`InvalidString`]: enum.CommandError.html#variant.InvalidString + /// [`InvalidString`]: enum.LibraryError.html#variant.InvalidString /// [`Unknown`]: enum.CommandError.html#variant.Unknown /// [`WrongPassword`]: enum.CommandError.html#variant.WrongPassword - fn get_password_safe(&self, user_pin: &str) -> Result<PasswordSafe<'_>, CommandError>; + fn get_password_safe(&mut self, user_pin: &str) -> Result<PasswordSafe<'_, 'a>, Error>; } -fn get_password_safe<'a>( - device: &'a dyn Device, +fn get_password_safe<'a, 'b>( + device: &'a dyn Device<'b>, user_pin: &str, -) -> Result<PasswordSafe<'a>, CommandError> { +) -> Result<PasswordSafe<'a, 'b>, Error> { let user_pin_string = get_cstring(user_pin)?; - let result = unsafe { - get_command_result(nitrokey_sys::NK_enable_password_safe( - user_pin_string.as_ptr(), - )) - }; - result.map(|()| PasswordSafe { _device: device }) + get_command_result(unsafe { nitrokey_sys::NK_enable_password_safe(user_pin_string.as_ptr()) }) + .map(|_| PasswordSafe { _device: device }) } -fn get_pws_result(s: String) -> Result<String, CommandError> { +fn get_pws_result(s: String) -> Result<String, Error> { if s.is_empty() { - Err(CommandError::SlotNotProgrammed) + Err(CommandError::SlotNotProgrammed.into()) } else { Ok(s) } } -impl<'a> PasswordSafe<'a> { +impl<'a, 'b> PasswordSafe<'a, 'b> { /// Returns the status of all password slots. /// /// The status indicates whether a slot is programmed or not. @@ -146,10 +145,11 @@ impl<'a> PasswordSafe<'a> { /// /// ```no_run /// use nitrokey::{GetPasswordSafe, SLOT_COUNT}; - /// # use nitrokey::CommandError; + /// # use nitrokey::Error; /// - /// # fn try_main() -> Result<(), CommandError> { - /// let device = nitrokey::connect()?; + /// # fn try_main() -> Result<(), Error> { + /// let mut manager = nitrokey::take()?; + /// let mut device = manager.connect()?; /// let pws = device.get_password_safe("123456")?; /// pws.get_slot_status()?.iter().enumerate().for_each(|(slot, programmed)| { /// let status = match *programmed { @@ -161,7 +161,7 @@ impl<'a> PasswordSafe<'a> { /// # Ok(()) /// # } /// ``` - pub fn get_slot_status(&self) -> Result<[bool; SLOT_COUNT as usize], CommandError> { + pub fn get_slot_status(&self) -> Result<[bool; SLOT_COUNT as usize], Error> { let status_ptr = unsafe { nitrokey_sys::NK_get_password_safe_slot_status() }; if status_ptr.is_null() { return Err(get_last_error()); @@ -191,10 +191,11 @@ impl<'a> PasswordSafe<'a> { /// /// ```no_run /// use nitrokey::GetPasswordSafe; - /// # use nitrokey::CommandError; + /// # use nitrokey::Error; /// - /// # fn try_main() -> Result<(), CommandError> { - /// let device = nitrokey::connect()?; + /// # fn try_main() -> Result<(), Error> { + /// let mut manager = nitrokey::take()?; + /// let mut device = manager.connect()?; /// match device.get_password_safe("123456") { /// Ok(pws) => { /// let name = pws.get_slot_name(0)?; @@ -202,16 +203,16 @@ impl<'a> PasswordSafe<'a> { /// let password = pws.get_slot_login(0)?; /// println!("Credentials for {}: login {}, password {}", name, login, password); /// }, - /// Err(err) => println!("Could not open the password safe: {}", err), + /// Err(err) => eprintln!("Could not open the password safe: {}", err), /// }; /// # Ok(()) /// # } /// ``` /// - /// [`InvalidSlot`]: enum.CommandError.html#variant.InvalidSlot + /// [`InvalidSlot`]: enum.LibraryError.html#variant.InvalidSlot /// [`SlotNotProgrammed`]: enum.CommandError.html#variant.SlotNotProgrammed - pub fn get_slot_name(&self, slot: u8) -> Result<String, CommandError> { - unsafe { result_from_string(nitrokey_sys::NK_get_password_safe_slot_name(slot)) } + pub fn get_slot_name(&self, slot: u8) -> Result<String, Error> { + result_from_string(unsafe { nitrokey_sys::NK_get_password_safe_slot_name(slot) }) .and_then(get_pws_result) } @@ -228,10 +229,11 @@ impl<'a> PasswordSafe<'a> { /// /// ```no_run /// use nitrokey::GetPasswordSafe; - /// # use nitrokey::CommandError; + /// # use nitrokey::Error; /// - /// # fn try_main() -> Result<(), CommandError> { - /// let device = nitrokey::connect()?; + /// # fn try_main() -> Result<(), Error> { + /// let mut manager = nitrokey::take()?; + /// let mut device = manager.connect()?; /// let pws = device.get_password_safe("123456")?; /// let name = pws.get_slot_name(0)?; /// let login = pws.get_slot_login(0)?; @@ -241,10 +243,10 @@ impl<'a> PasswordSafe<'a> { /// # } /// ``` /// - /// [`InvalidSlot`]: enum.CommandError.html#variant.InvalidSlot + /// [`InvalidSlot`]: enum.LibraryError.html#variant.InvalidSlot /// [`SlotNotProgrammed`]: enum.CommandError.html#variant.SlotNotProgrammed - pub fn get_slot_login(&self, slot: u8) -> Result<String, CommandError> { - unsafe { result_from_string(nitrokey_sys::NK_get_password_safe_slot_login(slot)) } + pub fn get_slot_login(&self, slot: u8) -> Result<String, Error> { + result_from_string(unsafe { nitrokey_sys::NK_get_password_safe_slot_login(slot) }) .and_then(get_pws_result) } @@ -261,10 +263,11 @@ impl<'a> PasswordSafe<'a> { /// /// ```no_run /// use nitrokey::GetPasswordSafe; - /// # use nitrokey::CommandError; + /// # use nitrokey::Error; /// - /// # fn try_main() -> Result<(), CommandError> { - /// let device = nitrokey::connect()?; + /// # fn try_main() -> Result<(), Error> { + /// let mut manager = nitrokey::take()?; + /// let mut device = manager.connect()?; /// let pws = device.get_password_safe("123456")?; /// let name = pws.get_slot_name(0)?; /// let login = pws.get_slot_login(0)?; @@ -274,10 +277,10 @@ impl<'a> PasswordSafe<'a> { /// # } /// ``` /// - /// [`InvalidSlot`]: enum.CommandError.html#variant.InvalidSlot + /// [`InvalidSlot`]: enum.LibraryError.html#variant.InvalidSlot /// [`SlotNotProgrammed`]: enum.CommandError.html#variant.SlotNotProgrammed - pub fn get_slot_password(&self, slot: u8) -> Result<String, CommandError> { - unsafe { result_from_string(nitrokey_sys::NK_get_password_safe_slot_password(slot)) } + pub fn get_slot_password(&self, slot: u8) -> Result<String, Error> { + result_from_string(unsafe { nitrokey_sys::NK_get_password_safe_slot_password(slot) }) .and_then(get_pws_result) } @@ -292,10 +295,11 @@ impl<'a> PasswordSafe<'a> { /// /// ```no_run /// use nitrokey::GetPasswordSafe; - /// # use nitrokey::CommandError; + /// # use nitrokey::Error; /// - /// # fn try_main() -> Result<(), CommandError> { - /// let device = nitrokey::connect()?; + /// # fn try_main() -> Result<(), Error> { + /// let mut manager = nitrokey::take()?; + /// let mut device = manager.connect()?; /// let pws = device.get_password_safe("123456")?; /// let name = pws.get_slot_name(0)?; /// let login = pws.get_slot_login(0)?; @@ -305,26 +309,26 @@ impl<'a> PasswordSafe<'a> { /// # } /// ``` /// - /// [`InvalidSlot`]: enum.CommandError.html#variant.InvalidSlot - /// [`InvalidString`]: enum.CommandError.html#variant.InvalidString + /// [`InvalidSlot`]: enum.LibraryError.html#variant.InvalidSlot + /// [`InvalidString`]: enum.LibraryError.html#variant.InvalidString pub fn write_slot( - &self, + &mut self, slot: u8, name: &str, login: &str, password: &str, - ) -> Result<(), CommandError> { + ) -> Result<(), Error> { let name_string = get_cstring(name)?; let login_string = get_cstring(login)?; let password_string = get_cstring(password)?; - unsafe { - get_command_result(nitrokey_sys::NK_write_password_safe_slot( + get_command_result(unsafe { + nitrokey_sys::NK_write_password_safe_slot( slot, name_string.as_ptr(), login_string.as_ptr(), password_string.as_ptr(), - )) - } + ) + }) } /// Erases the given slot. Erasing clears the stored name, login and password (if the slot was @@ -338,46 +342,47 @@ impl<'a> PasswordSafe<'a> { /// /// ```no_run /// use nitrokey::GetPasswordSafe; - /// # use nitrokey::CommandError; + /// # use nitrokey::Error; /// - /// # fn try_main() -> Result<(), CommandError> { - /// let device = nitrokey::connect()?; - /// let pws = device.get_password_safe("123456")?; + /// # fn try_main() -> Result<(), Error> { + /// let mut manager = nitrokey::take()?; + /// let mut device = manager.connect()?; + /// let mut pws = device.get_password_safe("123456")?; /// match pws.erase_slot(0) { /// Ok(()) => println!("Erased slot 0."), - /// Err(err) => println!("Could not erase slot 0: {}", err), + /// Err(err) => eprintln!("Could not erase slot 0: {}", err), /// }; /// # Ok(()) /// # } /// ``` /// - /// [`InvalidSlot`]: enum.CommandError.html#variant.InvalidSlot - pub fn erase_slot(&self, slot: u8) -> Result<(), CommandError> { - unsafe { get_command_result(nitrokey_sys::NK_erase_password_safe_slot(slot)) } + /// [`InvalidSlot`]: enum.LibraryError.html#variant.InvalidSlot + pub fn erase_slot(&mut self, slot: u8) -> Result<(), Error> { + get_command_result(unsafe { nitrokey_sys::NK_erase_password_safe_slot(slot) }) } } -impl<'a> Drop for PasswordSafe<'a> { +impl<'a, 'b> Drop for PasswordSafe<'a, 'b> { fn drop(&mut self) { // TODO: disable the password safe -- NK_lock_device has side effects on the Nitrokey // Storage, see https://github.com/Nitrokey/nitrokey-storage-firmware/issues/65 } } -impl GetPasswordSafe for Pro { - fn get_password_safe(&self, user_pin: &str) -> Result<PasswordSafe<'_>, CommandError> { +impl<'a> GetPasswordSafe<'a> for Pro<'a> { + fn get_password_safe(&mut self, user_pin: &str) -> Result<PasswordSafe<'_, 'a>, Error> { get_password_safe(self, user_pin) } } -impl GetPasswordSafe for Storage { - fn get_password_safe(&self, user_pin: &str) -> Result<PasswordSafe<'_>, CommandError> { +impl<'a> GetPasswordSafe<'a> for Storage<'a> { + fn get_password_safe(&mut self, user_pin: &str) -> Result<PasswordSafe<'_, 'a>, Error> { get_password_safe(self, user_pin) } } -impl GetPasswordSafe for DeviceWrapper { - fn get_password_safe(&self, user_pin: &str) -> Result<PasswordSafe<'_>, CommandError> { +impl<'a> GetPasswordSafe<'a> for DeviceWrapper<'a> { + fn get_password_safe(&mut self, user_pin: &str) -> Result<PasswordSafe<'_, 'a>, Error> { get_password_safe(self, user_pin) } } diff --git a/src/util.rs b/src/util.rs index 567c478..26942cf 100644 --- a/src/util.rs +++ b/src/util.rs @@ -1,53 +1,13 @@ -use std::borrow; +// Copyright (C) 2018-2019 Robin Krahl <robin.krahl@ireas.org> +// SPDX-License-Identifier: MIT + use std::ffi::{CStr, CString}; -use std::fmt; use std::os::raw::{c_char, c_int}; use libc::{c_void, free}; -use rand_core::RngCore; -use rand_os::OsRng; +use rand_core::{OsRng, RngCore}; -/// Error types returned by Nitrokey device or by the library. -#[derive(Clone, Copy, Debug, PartialEq)] -pub enum CommandError { - /// A packet with a wrong checksum has been sent or received. - WrongCrc, - /// A command tried to access an OTP slot that does not exist. - WrongSlot, - /// A command tried to generate an OTP on a slot that is not configured. - SlotNotProgrammed, - /// The provided password is wrong. - WrongPassword, - /// You are not authorized for this command or provided a wrong temporary - /// password. - NotAuthorized, - /// An error occurred when getting or setting the time. - Timestamp, - /// You did not provide a name for the OTP slot. - NoName, - /// This command is not supported by this device. - NotSupported, - /// This command is unknown. - UnknownCommand, - /// AES decryption failed. - AesDecryptionFailed, - /// An unknown error occurred. - Unknown(i64), - /// An unspecified error occurred. - Undefined, - /// You passed a string containing a null byte. - InvalidString, - /// A supplied string exceeded a length limit. - StringTooLong, - /// You passed an invalid slot. - InvalidSlot, - /// The supplied string was not in hexadecimal format. - InvalidHexString, - /// The target buffer was smaller than the source. - TargetBufferTooSmall, - /// An error occurred during random number generation. - RngError, -} +use crate::error::{Error, LibraryError}; /// Log level for libnitrokey. /// @@ -70,126 +30,76 @@ pub enum LogLevel { DebugL2, } -pub fn owned_str_from_ptr(ptr: *const c_char) -> String { - unsafe { - return CStr::from_ptr(ptr).to_string_lossy().into_owned(); - } +pub fn str_from_ptr<'a>(ptr: *const c_char) -> Result<&'a str, Error> { + unsafe { CStr::from_ptr(ptr) }.to_str().map_err(Error::from) +} + +pub fn owned_str_from_ptr(ptr: *const c_char) -> Result<String, Error> { + str_from_ptr(ptr).map(ToOwned::to_owned) } -pub fn result_from_string(ptr: *const c_char) -> Result<String, CommandError> { +pub fn run_with_string<R, F>(ptr: *const c_char, op: F) -> Result<R, Error> +where + F: FnOnce(&str) -> Result<R, Error>, +{ if ptr.is_null() { - return Err(CommandError::Undefined); + return Err(Error::UnexpectedError( + "libnitrokey returned a null pointer".to_owned(), + )); } - unsafe { - let s = owned_str_from_ptr(ptr); - free(ptr as *mut c_void); + let result = str_from_ptr(ptr).and_then(op); + unsafe { free(ptr as *mut c_void) }; + result +} + +pub fn result_from_string(ptr: *const c_char) -> Result<String, Error> { + run_with_string(ptr, |s| { // An empty string can both indicate an error or be a valid return value. In this case, we // have to check the last command status to decide what to return. if s.is_empty() { - get_last_result().map(|_| s) + get_last_result().map(|_| s.to_owned()) } else { - Ok(s) + Ok(s.to_owned()) } - } + }) } -pub fn get_command_result(value: c_int) -> Result<(), CommandError> { - match value { - 0 => Ok(()), - other => Err(CommandError::from(other)), - } +pub fn result_or_error<T>(value: T) -> Result<T, Error> { + get_last_result().and(Ok(value)) } -pub fn get_last_result() -> Result<(), CommandError> { - let value = unsafe { nitrokey_sys::NK_get_last_command_status() } as c_int; - get_command_result(value) -} - -pub fn get_last_error() -> CommandError { - return match get_last_result() { - Ok(()) => CommandError::Undefined, - Err(err) => err, - }; -} - -pub fn generate_password(length: usize) -> Result<Vec<u8>, CommandError> { - let mut rng = OsRng::new()?; - let mut data = vec![0u8; length]; - rng.fill_bytes(&mut data[..]); - Ok(data) -} - -pub fn get_cstring<T: Into<Vec<u8>>>(s: T) -> Result<CString, CommandError> { - CString::new(s).or(Err(CommandError::InvalidString)) +pub fn get_command_result(value: c_int) -> Result<(), Error> { + if value == 0 { + Ok(()) + } else { + Err(Error::from(value)) + } } -impl CommandError { - fn as_str(&self) -> borrow::Cow<'static, str> { - match *self { - CommandError::WrongCrc => { - "A packet with a wrong checksum has been sent or received".into() - } - CommandError::WrongSlot => "The given OTP slot does not exist".into(), - CommandError::SlotNotProgrammed => "The given OTP slot is not programmed".into(), - CommandError::WrongPassword => "The given password is wrong".into(), - CommandError::NotAuthorized => { - "You are not authorized for this command or provided a wrong temporary \ - password" - .into() - } - CommandError::Timestamp => "An error occurred when getting or setting the time".into(), - CommandError::NoName => "You did not provide a name for the OTP slot".into(), - CommandError::NotSupported => "This command is not supported by this device".into(), - CommandError::UnknownCommand => "This command is unknown".into(), - CommandError::AesDecryptionFailed => "AES decryption failed".into(), - CommandError::Unknown(x) => { - borrow::Cow::from(format!("An unknown error occurred ({})", x)) - } - CommandError::Undefined => "An unspecified error occurred".into(), - CommandError::InvalidString => "You passed a string containing a null byte".into(), - CommandError::StringTooLong => "The supplied string is too long".into(), - CommandError::InvalidSlot => "The given slot is invalid".into(), - CommandError::InvalidHexString => { - "The supplied string is not in hexadecimal format".into() - } - CommandError::TargetBufferTooSmall => "The target buffer is too small".into(), - CommandError::RngError => "An error occurred during random number generation".into(), - } - } +pub fn get_last_result() -> Result<(), Error> { + get_command_result(unsafe { nitrokey_sys::NK_get_last_command_status() }.into()) } -impl fmt::Display for CommandError { - fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { - write!(f, "{}", self.as_str()) - } +pub fn get_last_error() -> Error { + get_last_result().err().unwrap_or_else(|| { + Error::UnexpectedError("Expected an error, but command status is zero".to_owned()) + }) } -impl From<c_int> for CommandError { - fn from(value: c_int) -> Self { - match value { - 1 => CommandError::WrongCrc, - 2 => CommandError::WrongSlot, - 3 => CommandError::SlotNotProgrammed, - 4 => CommandError::WrongPassword, - 5 => CommandError::NotAuthorized, - 6 => CommandError::Timestamp, - 7 => CommandError::NoName, - 8 => CommandError::NotSupported, - 9 => CommandError::UnknownCommand, - 10 => CommandError::AesDecryptionFailed, - 200 => CommandError::StringTooLong, - 201 => CommandError::InvalidSlot, - 202 => CommandError::InvalidHexString, - 203 => CommandError::TargetBufferTooSmall, - x => CommandError::Unknown(x.into()), +pub fn generate_password(length: usize) -> Result<CString, Error> { + loop { + // Randomly generate a password until we get a string *without* null bytes. Otherwise + // the string would be cut off prematurely due to null-termination in C. + let mut data = vec![0u8; length]; + OsRng.fill_bytes(&mut data[..]); + if let Ok(s) = CString::new(data) { + return Ok(s); } } } -impl From<rand_core::Error> for CommandError { - fn from(_error: rand_core::Error) -> Self { - CommandError::RngError - } +pub fn get_cstring<T: Into<Vec<u8>>>(s: T) -> Result<CString, Error> { + CString::new(s).map_err(|_| LibraryError::InvalidString.into()) } impl Into<i32> for LogLevel { |