1 // Copyright 2012 The Go Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style 3 // license that can be found in the LICENSE file. 4 5 // +build amd64,!gccgo,!appengine 6 7 package poly1305 8 9 // This function is implemented in sum_amd64.s 10 //go:noescape 11 func poly1305(out *[16]byte, m *byte, mlen uint64, key *[32]byte) 12 13 // Sum generates an authenticator for m using a one-time key and puts the 14 // 16-byte result into out. Authenticating two different messages with the same 15 // key allows an attacker to forge messages at will. 16 func Sum(out *[16]byte, m []byte, key *[32]byte) { 17 var mPtr *byte 18 if len(m) > 0 { 19 mPtr = &m[0] 20 } 21 poly1305(out, mPtr, uint64(len(m)), key) 22 } 23
