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* Replace rand_os::OsRng with rand_core::OsRngRobin Krahl2019-12-27
| | | | | rand_os::OsRng has been deprecated. Instead we can use rand_core with the getrandom feature.
* Refactor the device module into submodulesRobin Krahl2019-07-16
| | | | | | This patch splits the rather large device module into the submodules pro, storage and wrapper. This only changes the internal code structure and does not affect the public API.
* Update rand_{core,os} dependenciesRobin Krahl2019-07-16
| | | | | | | This patch updates the rand_core dependency to version 0.5 and the rand_os dependency to version 0.2. This causes a change in util.rs: Instead of constructing an OsRng instance using OsRng::new(), we can directly instantiate the (now empty) struct.
* Add force_take function to ignore poisoned cacheRobin Krahl2019-07-09
| | | | | | | | | The take and take_blocking functions return a PoisonError if the cache is poisoned, i. e. if a thread panicked while holding the manager. This is a sensible default behaviour, but for example during testing, one might want to ignore the poisoned cache. This patch adds the force_take function that unwraps the PoisonError and returns the cached Manager even if the cache was poisoned.
* Remove allow(deprecated) attribute for in lib.rsRobin Krahl2019-07-09
| | | | | | During the connection manager refactoring, we temporarily used deprecated methods. This is no longer the case, so we can remove the allow(deprecated) attribute.
* Update documentation for Manager refactoringRobin Krahl2019-07-09
| | | | | | This patch updates the documentation to reflect the latest changes to connection handling. It also updates the doc tests to prefer the new methods over the old ones.
* Introduce into_manager for DeviceRobin Krahl2019-07-09
| | | | | | | | To enable applications like nitrokey-test to go back to a manager instance from a Device instance, we add the into_manager function to the Device trait. To do that, we have to keep track of the Manager’s lifetime by adding a lifetime to Device (and then to some other traits that use Device).
* Store mutable reference to Manager in DeviceRobin Krahl2019-07-08
| | | | | | | | | | | | | In the last patches, we ensured that devices can only be obtained using the Manager struct. But we did not ensure that there is only one device at a time. This patch adds a mutable reference to the Manager instance to the Device implementations. The borrow checker makes sure that there is only one mutable reference at a time. In this patch, we have to remove the old connect, Pro::connect and Storage::connect functions as they do no longer compile. (They discard the MutexGuard which invalidates the reference to the Manager.) Therefore the tests do no longer compile.
* Move {Pro, Storage}::connect into ManagerRobin Krahl2019-07-08
| | | | | | | As part of the connection refactoring, this patch moves the connect methods of the Pro and Storage structs into the Manager struct. To maintain compatibility with nitrokey-test, the old methods are not removed but marked as deprecated.
* Move the connect_model function into ManagerRobin Krahl2019-07-08
| | | | | | As part of the connection refactoring, this patch moves the connect_model function to the Manager struct. As the connect_model function is not used by nitrokey-test, it is removed.
* Move the connect function into ManagerRobin Krahl2019-07-08
| | | | | | | As part of the connection refactoring, we replace the connect function with the Manager::connect method. To maintain compatibility with nitrokey-test, the connect function is not removed but marked as deprecated.
* Add Manager struct to manage Nitrokey connectionsRobin Krahl2019-07-08
| | | | | | | | | | | | | As part of the connection refactoring, we introduce the Manager struct that deals with connection management. To make sure there can be only once instance of the manager, we add a global static Mutex that holds the single Manager instance. We use the struct to ensure that the user can only connect to one device at a time. This also changes the Error::PoisonError variant to store the sync::PoisonError. This allows the user to call into_inner on the PoisonError to retrieve the MutexGuard and to ignore the error (for example useful during testing).
* Add ConcurrentAccessError and PoisonError variantsRobin Krahl2019-07-08
| | | | | | | | | This patch prepares the refactoring of the connection methods by introducing the Error variants ConcurrentAccessError and PoisonError. ConcurrentAccessError indicates that the user tried to connect to obtain a token that is currently locked, and PoisonError indicates that a lock has been poisoned, i. e. a thread panicked while accessing using a token.
* Fix formatting error in device.rsRobin Krahl2019-07-07
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* Update nitrokey-sys to version 3.5Robin Krahl2019-07-05
| | | | | | | | | As the return type of the NK_get_{major,minor}_firmware_version methods changed with libnitrokey 3.5, we also have to adapt our get_firmware_version function in device.rs. This patch also updates the changelog and the todo list with the changes caused by the new libnitrokey version.
* Revert "Store mutable reference to Device in PasswordSafe"Robin Krahl2019-02-05
| | | | This reverts commit 13006c00dcbd570cf8347d89557834e320427377.
* Revert "Refactor User and Admin to use a mutable reference"Robin Krahl2019-02-05
| | | | This reverts commit 0972bbe82623c3d9649b6023d8f50d304aa0cde6.
* Store mutable reference to Device in PasswordSafeRobin Krahl2019-02-02
| | | | | | | | | The current implementation of PasswordSafe stored a normal reference to the Device. This patch changes the PasswordSafe struct to use a mutable reference instead. This allows the borrow checker to make sure that there is only one PasswordSafe instance at a time. While this is currently not needed, it will become important once we can lock the PWS on the Nitrokey when dropping the PasswordSafe instance.
* Refactor User and Admin to use a mutable referenceRobin Krahl2019-02-02
| | | | | | | | | | | | In the initial nitrokey-rs implementation, the Admin and the User struct take the Device by value to make sure that the user cannot initiate a second authentication while this first is still active (which would invalidate the temporary password). Now we realized that this is not necessary – taking a mutable reference has the same effect, but leads to a much cleaner API. This patch refactors the Admin and User structs – and all dependent code – to use a mutable reference instead of a Device value.
* Require mutable reference if method changes device stateRobin Krahl2019-02-02
| | | | | | | | | | | | Previously, all methods that access a Nitrokey device took a reference to the device as input. This method changes methods that change the device state to require a mutable reference instead. In most case, this is straightforward as the method writes data to the device (for example write_config or change_user_pin). But there are two edge cases: - Authenticating with a PIN changes the device state as it may decrease the PIN retry counter if the authentication fails. - Generating an HOTP code changes the device state as it increases the HOTP counter.
* Add device_mut method to DeviceWrapperRobin Krahl2019-02-02
| | | | | | To prepare the mutability refactoring, we add a device_mut method to DeviceWrapper that can be used to obtain a mutable reference to the wrapped device.
* Implement DerefMut for User and AdminRobin Krahl2019-02-02
| | | | | | As we want to change some methods to take a mutable reference to a Device, we implement DerefMut for User<T> and Admin<T> so that users can obtain a mutable reference to the wrapped device.
* Add set_encrypted_volume_mode method to StorageRobin Krahl2019-01-31
| | | | | | | | | | Previously, we considered this command as unsupported as it only was available with firmware version 0.49. But as discussed in nitrocli issue 80 [0], it will probably be re-enabled in future firmware versions. Therefore this patch adds the set_encrypted_volume_mode to Storage. [0] https://github.com/d-e-s-o/nitrocli/issues/80
* Prefer eprintln over println for error messagesRobin Krahl2019-01-28
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* Add get_firmware_version methodRobin Krahl2019-01-28
| | | | | | | | This patch combines the get_{major,minor}_firmware_version methods into the new get_firmware_version method that returns a FirmwareVersion struct. Currently, this requires casting from i32 to u8. But this will be fixed with the next libnitrokey version as we change the return types for the firmware getters.
* Always return a Result when communicating with a deviceRobin Krahl2019-01-27
| | | | | | | | Previously, we sometimes returned a value without wrapping it in a result if the API method did not indicate errors in the return value. But we can detect errors using the NK_get_last_command_status function. This patch changes the return types of these methods to Result<_, Error> and adds error checks.
* Use if instead of match for boolean expressionRobin Krahl2019-01-27
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* Replace or with or_else in get_cstringRobin Krahl2019-01-27
| | | | | To avoid unnecessary function calls, we replace the or with an or_else in get_cstring.
* Remove the static lifetime modifier from constantsRobin Krahl2019-01-27
| | | | | The DEFAULT_{ADMIN,USER}_PIN constants implicitly have static lifetime. Therefore we can remove the static lifetime modifiers.
* Rename Error::Unknown to Error::UnknownErrorRobin Krahl2019-01-27
| | | | | For consistency with the other Error variants, we rename Unknown to UnknownError.
* Remove the Result typedefRobin Krahl2019-01-27
| | | | | | | | | Many of our functions do not return a Result<_, Error>, but for example a Result<_, (Device, Error)>. We only use the typedef in one function, but it makes the other functions more complicated as we have to use result::Result (if crate::Result is imported). Therefore, this patch removes the typedef. Applications or libraries can still redefine it if they want to.
* Remove rand_core::Error from public APIRobin Krahl2019-01-25
| | | | | | | rand_core does not have a stable release yet, and it is unlikely that there will be one soon. To be able to stabilize nitrokey without waiting for a stable rand_core version, we remove the rand_core::Error type from the public API and replace it with a Box<dyn error::Error>.
* Add license and copyright informationRobin Krahl2019-01-23
| | | | | | | This patch adds license and copyright information to all files to make nitrokey-rs compliant with the REUSE practices [0]. [0] https://reuse.software/practices/2.0/
* Implement From<(T: Device, Error)> for ErrorRobin Krahl2019-01-23
| | | | | | Not all users of the authenticate methods want to use the device after an error, so implementing From<(T: Device, Error)> for Error makes it easier for them to discard the device.
* Return UTF-8 error if libnitrokey returns an invalid stringRobin Krahl2019-01-23
| | | | | | | Previously, we used lossy UTF-8 conversion. Yet the user should be notified if we have a problem instead of silently changing the data. Therefore, we now return an error if we enocunter an invalid UTF-8 string. This leads to a change in `get_library_version`’s signature.
* Add Error::Utf8Error variantRobin Krahl2019-01-23
| | | | | Previously, we just ignored UTF-8 errors. This patch prepares the Utf8Error variant so that we are able to return UTF-8 errors.
* Implement From<Pro> and From<Storage> for DeviceWrapperRobin Krahl2019-01-23
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* Add Pro::new and Storage::new functionsRobin Krahl2019-01-23
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* Refactor and clean up all codeRobin Krahl2019-01-23
| | | | | | | This includes: - using idiomatic Rust - limiting the scope of unsafe blocks - simplifying code
* Add temp_password_ptr method to AuthenticatedDeviceRobin Krahl2019-01-23
| | | | | | To reduce the number of casts, we introduce the temp_password_ptr method that casts the pointer received from the Vec<u8> to a c_char pointer that can be handled by libnitrokey.
* Prefer into() over numeric castingRobin Krahl2019-01-23
| | | | | | Numeric casting might truncate an integer, while into() is only implemented for numeric types if the cast is possible without truncation.
* Prevent direct instantiation of Pro and StorageRobin Krahl2019-01-23
| | | | | | The Pro and Storage structs may only be created using the connect functions. This patch adds a private PhantomData field to the structs to ensure that the compiler does not allow direct instantiation.
* Check specific error codes in the testsRobin Krahl2019-01-20
| | | | | | | | | | If possible, check specific error codes instead of `is_err()`. This makes the code more readable and catches bugs resulting in the wrong error code. Also, using the assert_*_err and assert_ok macros yields error messages containing the expected and the actual value. To be able to use these macros with the `get_password_safe` method, we also have to implement `Debug` for `PasswordSafe` and `Device`.
* Remove the unused CommandError::Undefined variantRobin Krahl2019-01-20
| | | | | | The CommandError::Undefined variant has been refactored into Error::UnexpectedError and CommunicationError::NotConnected and is therefore no longer needed.
* Return CommunicationError::NotConnected from connect functionsRobin Krahl2019-01-20
| | | | | | | | | Previously, we returned a CommandError::Undefined if a connect function failed. A CommunicationError::NotConnected is a more specific and better fitting choice. Once the Try trait has been stabilized, we should return an Option<_> instead of a Result<_, Error> from the connect functions.
* Introduce the Error::UnexpectedError variantRobin Krahl2019-01-20
| | | | | | | The UnexpectedError variant is used when a libnitrokey function returns a value that violates the function’s contract, for example if a function returns a null pointer although it guarantees to never return null. Previously, we returned a CommandError::Unspecified in these cases.
* Make CommandError messages more generalRobin Krahl2019-01-20
| | | | For example, the WrongSlot error may also be returned for a PWS slot.
* Remove CommandError::as_str methodRobin Krahl2019-01-20
| | | | | AsStr is automatically implementeded if Display is implemented, so having a manual as_str() method is not necessary.
* Add the CommunicationError enumRobin Krahl2019-01-20
| | | | | | Communication errors returned by libnitrokey were previously not mapped to an error type in the nitrokey crate. We introduce the CommunicationError enum to represent these errors.
* Refactor library errors into LibraryError enumRobin Krahl2019-01-20
| | | | | | Previously, library errors were part of the CommandError enum. As command errors and library errors are two different error types, they should be split into two enums.