challenge-response

challenge-response is a Rust library for performing challenge-response operations (hashing and encryption) using security keys like the YubiKey and the OnlyKey.

Examples

Code examples for performing a challenge-response (both HMAC and OTP) as well as configuring a device can be found in the examples/ directory.

Current features

• HMAC-SHA1 Challenge-Response
• Yubico OTP Challenge-Response encryption
• Challenge-Response configuration

Supported devices

• YubiKey 2.2 and later
• OnlyKey (untested)
• NitroKey (untested)

Usage

Add this to your Cargo.toml

[dependencies]
challenge_response = "0"

nusb backend (EXPERIMENTAL)

You can enable the experimental nusb backend by adding the following to your Cargo.toml manifest:

[dependencies]
challenge_response = { version = "0", default-features = false, features = ["nusb"] }

The nusb backend has the advantage of not depending on libusb, thus making it easier to add challenge_response to your dependencies.

[!NOTE] The nusb feature is not available on Windows. If configured, the library will default to using the rusb backend instead.

Credits

This library was originally a fork of the yubico_manager library.

License

MIT or Apache-2.0