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