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|
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(Debug, PartialEq)]
enum Model {
/// The Nitrokey Storage.
Storage,
/// The Nitrokey Pro.
Pro,
}
/// 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
// TODO: add example for Storage-specific code
#[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,
}
/// 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 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()) }
}
}
/// Connects to a Nitrokey device. This method can be used to connect to any connected device,
/// both a Nitrokey Pro and a Nitrokey Storage.
///
/// # 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),
/// }
/// ```
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::Unknown),
},
_ => Err(CommandError::Unknown),
}
}
}
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_model(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 {}
impl Pro {
/// Connects to a Nitrokey Pro.
///
/// # 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),
/// }
/// ```
pub fn connect() -> Result<Pro, CommandError> {
// TODO: maybe Option instead of Result?
match connect_model(Model::Pro) {
true => Ok(Pro {}),
false => Err(CommandError::Unknown),
}
}
}
impl Drop for Pro {
fn drop(&mut self) {
unsafe {
nitrokey_sys::NK_logout();
}
}
}
impl Device for Pro {}
impl GenerateOtp for Pro {}
impl Storage {
/// Connects to a Nitrokey Storage.
///
/// # 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),
/// }
/// ```
pub fn connect() -> Result<Storage, CommandError> {
// TODO: maybe Option instead of Result?
match connect_model(Model::Storage) {
true => Ok(Storage {}),
false => Err(CommandError::Unknown),
}
}
/// 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()) }
}
/// 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)))
}
}
impl Drop for Storage {
fn drop(&mut self) {
unsafe {
nitrokey_sys::NK_logout();
}
}
}
impl Device for Storage {}
impl GenerateOtp for Storage {}
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,
}
}
}
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