Struct Poly1305Mac 

pub struct Poly1305Mac;

Poly1305 one-time message authentication code (16-byte tag).

Security warning

Poly1305 is a one-time MAC: the 32-byte key MUST NOT be reused for different messages. Re-use of the same key across messages completely destroys the security guarantee. In practice, derive a fresh per-message key from a stream cipher (e.g. ChaCha20) or a KDF.

Trait Implementations

impl Clone for Poly1305Mac

fn clone(&self) -> Poly1305Mac

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for Poly1305Mac

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for Poly1305Mac

fn default() -> Poly1305Mac

Returns the “default value” for a type.

impl Mac for Poly1305Mac

fn name(&self) -> &'static str

Human-readable algorithm identifier (e.g. "HMAC-SHA-256").

fn key_len(&self) -> usize

Required key length (minimum acceptable length; MACs are often variable).

fn output_len(&self) -> usize

Output tag length in bytes.

fn mac(&self, key: &[u8], msg: &[u8], out: &mut [u8]) -> Result<(), CryptoError>

Compute a MAC tag for msg under key and write it into out.

fn verify(&self, key: &[u8], msg: &[u8], tag: &[u8]) -> Result<(), CryptoError>

Verify a MAC tag in constant time.

fn mac_to_vec(&self, key: &[u8], msg: &[u8]) -> Result<Vec<u8>, CryptoError>

Convenience: compute MAC and return the tag as a Vec<u8>.

impl Copy for Poly1305Mac