Package poly1305
Package poly1305 implements Poly1305 one-time message authentication code as specified in http://cr.yp.to/mac/poly1305-20050329.pdf.
Poly1305 is a fast, one-time authentication function. It is infeasible for an
attacker to generate an authenticator for a message without the key. However, a
key must only be used for a single message. Authenticating two different
messages with the same key allows an attacker to forge authenticators for other
messages with the same key.
Poly1305 was originally coupled with AES in order to make Poly1305-AES. AES was
used with a fixed key in order to generate one-time keys from an nonce.
However, in this package AES isn't used and the one-time key is specified
directly.
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Constants
TagSize is the size, in bytes, of a poly1305 authenticator.
const TagSize = 16
func Sum(out *[16]byte, m []byte, key *[32]byte)
Sum generates an authenticator for m using a one-time key and puts the
16-byte result into out. Authenticating two different messages with the same
key allows an attacker to forge messages at will.
func Verify(mac *[16]byte, m []byte, key *[32]byte) bool
Verify returns true if mac is a valid authenticator for m with the given
key.
ActiveGo 1.8