class

Crypto::Poly1305::Fast

Poly1305 message authentication code (pure Crystal limb-arithmetic backend).

Uses 3×44-bit limbs in UInt64 with UInt128 intermediate products, following the poly1305-donna algorithm. Avoids heap-allocated BigInt entirely.

Constructors

chacha20(key : Bytes, nonce : Bytes) : self

Generating the Poly1305 Key Using ChaCha20

chacha20(cipher : ChaCha20::Cipher) : self

Generating the Poly1305 Key Using ChaCha20

new(key : Bytes)

Initializes the Poly1305 context with a given 32-byte key.

new(key : String)

Initializes the Poly1305 context with a given 32-byte hex-encoded key.

auth(key : Bytes, message : Bytes) : Bytes

A convenience method to compute a Poly1305 MAC for a single message.

final

Finalizes the MAC computation and returns the 16-byte authenticator.

key

update(msg : Bytes)

Processes a message fragment.