17 lines
556 B
Go
17 lines
556 B
Go
// Copyright 2018 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// +build s390x,!go1.11 !arm,!amd64,!s390x gccgo appengine nacl
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package poly1305
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// Sum generates an authenticator for msg using a one-time key and puts the
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// 16-byte result into out. Authenticating two different messages with the same
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// key allows an attacker to forge messages at will.
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func Sum(out *[TagSize]byte, msg []byte, key *[32]byte) {
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h := newMAC(key)
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h.Write(msg)
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h.Sum(out)
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}
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