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- // 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)
- }
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