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 poly1305_amd64.s 10 11 //go:noescape 12 13 func poly1305(out *[16]byte, m *byte, mlen uint64, key *[32]byte) 14 15 // Sum generates an authenticator for m using a one-time key and puts the 16 // 16-byte result into out. Authenticating two different messages with the same 17 // key allows an attacker to forge messages at will. 18 func Sum(out *[16]byte, m []byte, key *[32]byte) { 19 var mPtr *byte 20 if len(m) > 0 { 21 mPtr = &m[0] 22 } 23 poly1305(out, mPtr, uint64(len(m)), key) 24 } 25
