49 lines
1.0 KiB
Go
49 lines
1.0 KiB
Go
// Copyright 2012 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 amd64
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package aes
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// defined in asm_$GOARCH.s
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func hasAsm() bool
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func encryptBlockAsm(nr int, xk *uint32, dst, src *byte)
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func decryptBlockAsm(nr int, xk *uint32, dst, src *byte)
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func expandKeyAsm(nr int, key *byte, enc *uint32, dec *uint32)
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var useAsm = hasAsm()
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func encryptBlock(xk []uint32, dst, src []byte) {
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if useAsm {
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encryptBlockAsm(len(xk)/4-1, &xk[0], &dst[0], &src[0])
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} else {
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encryptBlockGo(xk, dst, src)
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}
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}
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func decryptBlock(xk []uint32, dst, src []byte) {
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if useAsm {
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decryptBlockAsm(len(xk)/4-1, &xk[0], &dst[0], &src[0])
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} else {
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decryptBlockGo(xk, dst, src)
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}
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}
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func expandKey(key []byte, enc, dec []uint32) {
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if useAsm {
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rounds := 10
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switch len(key) {
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case 128 / 8:
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rounds = 10
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case 192 / 8:
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rounds = 12
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case 256 / 8:
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rounds = 14
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}
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expandKeyAsm(rounds, &key[0], &enc[0], &dec[0])
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} else {
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expandKeyGo(key, enc, dec)
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}
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}
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