sum_amd64.go 694 B

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  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. // +build amd64,!gccgo,!appengine
  5. package poly1305
  6. // This function is implemented in sum_amd64.s
  7. //go:noescape
  8. func poly1305(out *[16]byte, m *byte, mlen uint64, key *[32]byte)
  9. // Sum generates an authenticator for m using a one-time key and puts the
  10. // 16-byte result into out. Authenticating two different messages with the same
  11. // key allows an attacker to forge messages at will.
  12. func Sum(out *[16]byte, m []byte, key *[32]byte) {
  13. var mPtr *byte
  14. if len(m) > 0 {
  15. mPtr = &m[0]
  16. }
  17. poly1305(out, mPtr, uint64(len(m)), key)
  18. }