Struct StreamingHashHmacSession 

pub struct StreamingHashHmacSession<H, F>
where
    H: StreamingHash,
    F: Fn() -> H + Send,
{ /* private fields */ }

Incremental HMAC session.

Created by StreamingHashHmac::streaming_session. Maintains the inner hasher state pre-loaded with ipad_key, ready for message data via update. Calling finalize computes the outer hash and returns the final HMAC tag.

Implementations

impl<H, F> StreamingHashHmacSession<H, F>

where H: StreamingHash, F: Fn() -> H + Send + Clone,

pub fn update(&mut self, data: &[u8])

Feed additional message bytes into the inner hash.

pub fn finalize(self, out: &mut [u8]) -> Result<(), CryptoError>

Finalise the inner hash and compute the outer HMAC, writing the tag into out.

Consumes self.

Errors

Returns CryptoError::BufferTooSmall if out.len() < output_len.