# Struct ring::hmac::VerificationKey [−] [src]

    pub struct VerificationKey { /* fields omitted */ }

A key to use for HMAC authentication.

## Methods

### `impl VerificationKey`
[src]

#### `fn new(digest_alg: &'static Algorithm, key_value: &[u8]) -> VerificationKey`

Construct an HMAC verification key using the given digest algorithm and key value.

As specified in RFC 2104, if `key_value` is shorter than the digest algorithm's block length (as returned by `digest::Algorithm::block_len`, not the digest length returned by `digest::Algorithm::output_len`) then it will be padded with zeros. Similarly, if it is longer than the block length then it will be compressed using the digest algorithm.

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