Authenticated and encrypted API tokens using modern crypto.
Branca is a secure easy to use token format which makes it hard to shoot yourself in the foot. It uses IETF XChaCha20-Poly1305 AEAD symmetric encryption to create encrypted and tamperproof tokens. Payload itself is an arbitrary sequence of bytes. You can use for example a JSON object, plain text string or even binary data serialized by MessagePack or Protocol Buffers.
Install the library using .NET SDK.
$ dotnet restore
$ dotnet runToken payload can be any arbitrary data such as string containing an email address. You also must provide a 32 byte secret key. The key is used for encrypting the payload.
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You can keep the token size small by using a space efficient serialization method such as MessagePack or Protocol Buffers.
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Branca token includes a timestamp when it was created. When decoding you can optionally pass a ttl parameter. Value is passed in seconds. Below example throws en exception if token is older than 60 minutes.
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You can run tests either manually or automatically on every code change.
$ dotnet testPlease see CONTRIBUTING for details.
If you discover any security related issues, please email tuupola@appelsiini.net instead of using the issue tracker.
The MIT License (MIT). Please see License File for more information.