Trait Hmac 

pub trait Hmac: Send + Sync {
    // Required methods
    fn with_key(&self, key: &[u8]) -> Box<dyn Key>;
    fn hash_output_len(&self) -> usize;
}

A concrete HMAC implementation, for a single cryptographic hash function.

You should have one object that implements this trait for HMAC-SHA256, another for HMAC-SHA384, etc.

Required Methods

fn with_key(&self, key: &[u8]) -> Box<dyn Key>

Prepare to use key as a HMAC key.

fn hash_output_len(&self) -> usize

Give the length of the underlying hash function. In RFC2104 terminology this is L.

Dyn Compatibility

This trait is dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementors