| // Copyright 2012 The Go Authors. All rights reserved. | |
| // Use of this source code is governed by a BSD-style | |
| // license that can be found in the LICENSE file. | |
| // +build amd64,!gccgo,!appengine | |
| package poly1305 | |
| // This function is implemented in sum_amd64.s | |
| //go:noescape | |
| func poly1305(out *[16]byte, m *byte, mlen uint64, 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 Sum(out *[16]byte, m []byte, key *[32]byte) { | |
| var mPtr *byte | |
| if len(m) > 0 { | |
| mPtr = &m[0] | |
| } | |
| poly1305(out, mPtr, uint64(len(m)), key) | |
| } |