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* 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.
* Revert "Refactor User and Admin to use a mutable reference"Robin Krahl2019-02-05
| | | | This reverts commit 0972bbe82623c3d9649b6023d8f50d304aa0cde6.
* 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.
* 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.
* Prefer eprintln over println for error messagesRobin Krahl2019-01-28
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* 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/
* 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.
* 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.
* Move the CommandError::Unknown to ErrorRobin Krahl2019-01-20
| | | | | | | An error code can not only indiciate a command error, but also a library or device communication error. Therefore, the variant for an unknown error code should be placed in the top-level Error enum instead of the CommandError enum.
* Return Error instead of CommandErrorRobin Krahl2019-01-20
| | | | | | | | | | This patch changes all public functions to return the Error enum instead of the CommandError enum. This breaks the tests which will be fixed with the next patch. This patch also adds a placeholder variant Error::CommandError and a placeholder enum CommandError to make the transition to a new nitrokey-test version easier.
* Move util::CommandError to the new error moduleRobin Krahl2019-01-20
| | | | This prepares the refactoring of util::CommandError into multiple enums.
* Pass temporary password as *const c_charRobin Krahl2019-01-20
| | | | | | | | | The random number generator used for the temporary password produces a Vec<u8>. The libnitrokey functions using the temporary password require a pointer to a c_char. Previously, we cast the u8 pointer to the Vec<u8> to a i8 pointer (unsigned to signed). This leads to a type mismatch if the char type is not signed. Therefore we now cast to c_char instead of i8.
* Use rand_os for random data generationDaniel Mueller2019-01-14
| | | | | | | | | | | | The rand crate comes with a slew of dependencies to cover all sort of randomness related tasks in various scenarios. However, this crate really only requires a tiny subset of this functionality. As it turns out, this core functionality is provided by the rand_os crate. This change drops the dependency to rand in favor of rand_os. In order to accomplish that, it brings back the RngError variant for the CommandError enum to capture the possibility of the creation of the random number generator failing.
* Remove CommandError::RngErrorRobin Krahl2019-01-03
| | | | | We switched to rand::thread_rng() which cannot fail. Therefore the CommandError::RngError is no longer needed and removed in this patch.
* Fix formatting using to rustfmtRobin Krahl2018-12-30
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* Use the crate:: path qualifier for modulesRobin Krahl2018-12-16
| | | | | | This patch changes use declarations for modules within this crate to use the crate:: path qualifier. This will be mandatory in Rust edition 2018.
* Use {} instead of {:?} where possibleRobin Krahl2018-06-07
| | | | | Most notably, for command errors, this will print a human-readable error message instead of just the name of the enum.
* Implement easier CString creationRobin Krahl2018-06-07
| | | | | | The new get_cstring method in util returns a Result<CString, CommandError>, so mast callers can just use the ? operator to unwrap the result instead of cumbersome unwrapping code.
* Use Result<(), CommandError> instead of CommandStatusRobin Krahl2018-06-07
| | | | | | The Result enum is more idiomatic and easier to use than our custom CommandStatus enum with the same structure. This is especially true for the try operator ?.
* Fix formatting issuesRobin Krahl2018-05-31
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* Fix implementation of Authenticate for DeviceWrapperRobin Krahl2018-05-29
| | | | | | Previously, the Authenticate implementation for DeviceWrapper paniced if the wrapped device is a Nitrokey Storage. This patch implements authentication for wrapped Storage devices.
* Add rudimentary support for the Nitrokey StorageRobin Krahl2018-05-29
| | | | | This patch adds the Storage struct and the test-storage feature. It also enables all currently supported Pro commands for the Storage.
* Move Admin, User and Authenticate to auth moduleRobin Krahl2018-05-28