LoadKey parses a JSON Web Key Set from a file path and returns the JSON Web Key identified by `keyID`.

NewKeyPair generates a new key pair for the given algorithm and gives it the kid specified in `keyID`.

NewSymmetricKeyPairFromString creates a symmetric key pair from the given key string and gives it the kid specified in `keyID`.

Validate takes a jwk and ensures that it's suitable for use as a key for use in signing and verifying Buildkite Job signatures.