Poly1305 APIs

Type declaration and APIs for the Poly1035 algorithm. More...

Macros
#define	ocrypto_poly1305_KEY_BYTES   (32)
#define	ocrypto_poly1305_BYTES   (16)

Functions
void	ocrypto_poly1305 (uint8_t r[(16)], const uint8_t *in, size_t in_len, const uint8_t k[(32)])

Incremental Poly1305 generator.
This group of functions can be used to incrementally compute the Poly1305 authenticator on a message. Use pattern: ocrypto_poly1305_init(ctx, key); ocrypto_poly1305_update(ctx, m, m_len); ... ocrypto_chacha20_update(ctx, m, m_len); ocrypto_poly1305_final(ctx, tag);
void	ocrypto_poly1305_init (ocrypto_poly1305_ctx *ctx, const uint8_t key[(32)])
void	ocrypto_poly1305_update (ocrypto_poly1305_ctx *ctx, const uint8_t *in, size_t in_len)
void	ocrypto_poly1305_pad (ocrypto_poly1305_ctx *ctx)
void	ocrypto_poly1305_final (ocrypto_poly1305_ctx *ctx, uint8_t r[(16)])

Detailed Description

Type declaration and APIs for the Poly1035 algorithm.

Poly1305 is a message authentication code created by Daniel J. Bernstein. It can be used to verify the data integrity and the authenticity of a message.

Poly1305 takes a one-time key to produce an authentication tag for a message. Since a key can only be used to authenticate a single message, a new key needs to be derived for each message.

See also

RFC 8439 - ChaCha20 and Poly1305 for IETF Protocols

Poly1305-AES: a state-of-the-art message-authentication code