83 lines
1.8 KiB
Go
83 lines
1.8 KiB
Go
// Copyright 2016 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 ignore
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package aes
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import (
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"crypto/cipher"
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)
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// defined in asm_ppc64le.s
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//go:noescape
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func setEncryptKeyAsm(key *byte, keylen int, enc *uint32) int
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//go:noescape
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func setDecryptKeyAsm(key *byte, keylen int, dec *uint32) int
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//go:noescape
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func doEncryptKeyAsm(key *byte, keylen int, dec *uint32) int
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//go:noescape
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func encryptBlockAsm(dst, src *byte, enc *uint32)
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//go:noescape
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func decryptBlockAsm(dst, src *byte, dec *uint32)
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type aesCipherAsm struct {
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aesCipher
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}
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func newCipher(key []byte) (cipher.Block, error) {
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n := 64 // size is fixed for all and round value is stored inside it too
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c := aesCipherAsm{aesCipher{make([]uint32, n), make([]uint32, n)}}
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k := len(key)
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ret := 0
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ret += setEncryptKeyAsm(&key[0], k*8, &c.enc[0])
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ret += setDecryptKeyAsm(&key[0], k*8, &c.dec[0])
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if ret > 0 {
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return nil, KeySizeError(k)
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}
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return &c, nil
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}
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func (c *aesCipherAsm) BlockSize() int { return BlockSize }
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func (c *aesCipherAsm) Encrypt(dst, src []byte) {
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if len(src) < BlockSize {
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panic("crypto/aes: input not full block")
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}
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if len(dst) < BlockSize {
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panic("crypto/aes: output not full block")
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}
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encryptBlockAsm(&dst[0], &src[0], &c.enc[0])
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}
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func (c *aesCipherAsm) Decrypt(dst, src []byte) {
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if len(src) < BlockSize {
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panic("crypto/aes: input not full block")
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}
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if len(dst) < BlockSize {
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panic("crypto/aes: output not full block")
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}
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decryptBlockAsm(&dst[0], &src[0], &c.dec[0])
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}
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// expandKey is used by BenchmarkExpand to ensure that the asm implementation
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// of key expansion is used for the benchmark when it is available.
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func expandKey(key []byte, enc, dec []uint32) {
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setEncryptKeyAsm(&key[0], len(key)*8, &enc[0])
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setDecryptKeyAsm(&key[0], len(key)*8, &dec[0])
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}
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