libgo/go/golang_org/x/crypto/poly1305/sum_amd64.go

   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 }