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-rw-r--r--nitrokey/src/auth.rs417
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diff --git a/nitrokey/src/auth.rs b/nitrokey/src/auth.rs
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-use std::ops::Deref;
-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::otp::{ConfigureOtp, GenerateOtp, OtpMode, OtpSlotData, RawOtpSlotData};
-use crate::util::{
- generate_password, get_command_result, get_cstring, result_from_string, CommandError,
-};
-
-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 {
- /// 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.
- ///
- /// This method generates a random temporary password that is used for all operations that
- /// require user access.
- ///
- /// # Errors
- ///
- /// - [`InvalidString`][] if the provided user password contains a null byte
- /// - [`RngError`][] if the generation of the temporary password failed
- /// - [`WrongPassword`][] if the provided user password is wrong
- ///
- /// # Example
- ///
- /// ```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(())
- /// # }
- /// ```
- ///
- /// [`InvalidString`]: enum.CommandError.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)>
- where
- Self: Device + Sized;
-
- /// Performs admin authentication. This method consumes the device. If successful, an
- /// authenticated device is returned. Otherwise, the current unauthenticated device and the
- /// error are returned.
- ///
- /// This method generates a random temporary password that is used for all operations that
- /// require admin access.
- ///
- /// # Errors
- ///
- /// - [`InvalidString`][] if the provided admin password contains a null byte
- /// - [`RngError`][] if the generation of the temporary password failed
- /// - [`WrongPassword`][] if the provided admin password is wrong
- ///
- /// # Example
- ///
- /// ```no_run
- /// use nitrokey::{Authenticate, Admin, DeviceWrapper};
- /// # use nitrokey::CommandError;
- ///
- /// fn perform_admin_task(device: &Admin<DeviceWrapper>) {}
- /// fn perform_other_task(device: &DeviceWrapper) {}
- ///
- /// # fn try_main() -> Result<(), CommandError> {
- /// let device = nitrokey::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);
- /// device
- /// },
- /// };
- /// perform_other_task(&device);
- /// # Ok(())
- /// # }
- /// ```
- ///
- /// [`InvalidString`]: enum.CommandError.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)>
- where
- Self: Device + Sized;
-}
-
-trait AuthenticatedDevice<T> {
- fn new(device: T, temp_password: Vec<u8>) -> Self;
-}
-
-/// A Nitrokey device with user authentication.
-///
-/// To obtain an instance of this struct, use the [`authenticate_user`][] method from the
-/// [`Authenticate`][] trait. To get back to an unauthenticated device, use the [`device`][]
-/// method.
-///
-/// [`Authenticate`]: trait.Authenticate.html
-/// [`authenticate_admin`]: trait.Authenticate.html#method.authenticate_admin
-/// [`device`]: #method.device
-#[derive(Debug)]
-pub struct User<T: Device> {
- device: T,
- temp_password: Vec<u8>,
-}
-
-/// A Nitrokey device with admin authentication.
-///
-/// To obtain an instance of this struct, use the [`authenticate_admin`][] method from the
-/// [`Authenticate`][] trait. To get back to an unauthenticated device, use the [`device`][]
-/// method.
-///
-/// [`Authenticate`]: trait.Authenticate.html
-/// [`authenticate_admin`]: trait.Authenticate.html#method.authenticate_admin
-/// [`device`]: #method.device
-#[derive(Debug)]
-pub struct Admin<T: Device> {
- device: T,
- temp_password: Vec<u8>,
-}
-
-fn authenticate<D, A, T>(device: D, password: &str, callback: T) -> Result<A, (D, CommandError)>
-where
- D: Device,
- A: AuthenticatedDevice<D>,
- T: Fn(*const c_char, *const c_char) -> c_int,
-{
- let temp_password = match generate_password(TEMPORARY_PASSWORD_LENGTH) {
- Ok(temp_password) => temp_password,
- Err(err) => return Err((device, err)),
- };
- let password = match get_cstring(password) {
- Ok(password) => password,
- 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) {
- 0 => Ok(A::new(device, temp_password)),
- rv => Err((device, CommandError::from(rv))),
- };
-}
-
-fn authenticate_user_wrapper<T, C>(
- device: T,
- constructor: C,
- password: &str,
-) -> Result<User<DeviceWrapper>, (DeviceWrapper, CommandError)>
-where
- T: Device,
- C: Fn(T) -> DeviceWrapper,
-{
- let result = device.authenticate_user(password);
- match result {
- Ok(user) => Ok(User::new(constructor(user.device), user.temp_password)),
- Err((device, err)) => Err((constructor(device), err)),
- }
-}
-
-fn authenticate_admin_wrapper<T, C>(
- device: T,
- constructor: C,
- password: &str,
-) -> Result<Admin<DeviceWrapper>, (DeviceWrapper, CommandError)>
-where
- T: Device,
- C: Fn(T) -> DeviceWrapper,
-{
- let result = device.authenticate_admin(password);
- match result {
- Ok(user) => Ok(Admin::new(constructor(user.device), user.temp_password)),
- Err((device, err)) => Err((constructor(device), err)),
- }
-}
-
-impl<T: Device> User<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.
- pub fn device(self) -> T {
- self.device
- }
-}
-
-impl<T: Device> Deref for User<T> {
- type Target = T;
-
- fn deref(&self) -> &Self::Target {
- &self.device
- }
-}
-
-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));
- }
- }
-
- 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<T: Device> AuthenticatedDevice<T> for User<T> {
- fn new(device: T, temp_password: Vec<u8>) -> Self {
- User {
- device,
- temp_password,
- }
- }
-}
-
-impl<T: Device> Deref for Admin<T> {
- type Target = T;
-
- fn deref(&self) -> &Self::Target {
- &self.device
- }
-}
-
-impl<T: Device> Admin<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.
- pub fn device(self) -> T {
- self.device
- }
-
- /// Writes the given configuration to the Nitrokey device.
- ///
- /// # Errors
- ///
- /// - [`InvalidSlot`][] if the provided numlock, capslock or scrolllock slot is larger than two
- ///
- /// # Example
- ///
- /// ```no_run
- /// use nitrokey::{Authenticate, Config};
- /// # use nitrokey::CommandError;
- ///
- /// # fn try_main() -> Result<(), CommandError> {
- /// let device = nitrokey::connect()?;
- /// let config = Config::new(None, None, None, false);
- /// match device.authenticate_admin("12345678") {
- /// Ok(admin) => {
- /// admin.write_config(config);
- /// ()
- /// },
- /// Err((_, err)) => println!("Could not authenticate as admin: {}", err),
- /// };
- /// # Ok(())
- /// # }
- /// ```
- ///
- /// [`InvalidSlot`]: enum.CommandError.html#variant.InvalidSlot
- pub fn write_config(&self, config: Config) -> Result<(), CommandError> {
- let raw_config = RawConfig::try_from(config)?;
- unsafe {
- get_command_result(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))
- }
-}
-
-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 {
- nitrokey_sys::NK_write_hotp_slot(
- raw_data.number,
- raw_data.name.as_ptr(),
- raw_data.secret.as_ptr(),
- counter,
- raw_data.mode == OtpMode::EightDigits,
- raw_data.use_enter,
- raw_data.use_token_id,
- raw_data.token_id.as_ptr(),
- temp_password_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 {
- nitrokey_sys::NK_write_totp_slot(
- raw_data.number,
- raw_data.name.as_ptr(),
- raw_data.secret.as_ptr(),
- time_window,
- raw_data.mode == OtpMode::EightDigits,
- raw_data.use_enter,
- raw_data.use_token_id,
- raw_data.token_id.as_ptr(),
- temp_password_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_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)) }
- }
-}
-
-impl<T: Device> AuthenticatedDevice<T> for Admin<T> {
- fn new(device: T, temp_password: Vec<u8>) -> Self {
- Admin {
- device,
- temp_password,
- }
- }
-}
-
-impl Authenticate for DeviceWrapper {
- fn authenticate_user(self, password: &str) -> Result<User<Self>, (Self, CommandError)> {
- match self {
- DeviceWrapper::Storage(storage) => {
- authenticate_user_wrapper(storage, DeviceWrapper::Storage, password)
- }
- DeviceWrapper::Pro(pro) => authenticate_user_wrapper(pro, DeviceWrapper::Pro, password),
- }
- }
-
- fn authenticate_admin(self, password: &str) -> Result<Admin<Self>, (Self, CommandError)> {
- match self {
- DeviceWrapper::Storage(storage) => {
- authenticate_admin_wrapper(storage, DeviceWrapper::Storage, password)
- }
- DeviceWrapper::Pro(pro) => {
- authenticate_admin_wrapper(pro, DeviceWrapper::Pro, password)
- }
- }
- }
-}
-
-impl Authenticate for Pro {
- fn authenticate_user(self, password: &str) -> Result<User<Self>, (Self, CommandError)> {
- 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)> {
- 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)> {
- 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)> {
- authenticate(self, password, |password_ptr, temp_password_ptr| unsafe {
- nitrokey_sys::NK_first_authenticate(password_ptr, temp_password_ptr)
- })
- }
-}
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