| // 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) |
| } |
