mirror of
https://github.com/henrydcase/nobs.git
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Henry Case
6f9706df01
benchmark old ns/op new ns/op delta BenchmarkInit-4 3403 397 -88.33% BenchmarkRead-4 14535 1560 -89.27%
87 lines
2.0 KiB
Go
87 lines
2.0 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, !noasm
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package aes
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import (
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"github.com/henrydcase/nobs/utils"
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)
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// defined in asm_*.s
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//go:noescape
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func encryptBlockAsm(nr int, xk *uint32, dst, src *byte)
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//go:noescape
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func decryptBlockAsm(nr int, xk *uint32, dst, src *byte)
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//go:noescape
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func expandKeyAsm(nr int, key *byte, enc *uint32, dec *uint32)
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type AESAsm struct {
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enc [32 + 28]uint32
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dec [32 + 28]uint32
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}
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func (c *AESAsm) SetKey(key []byte) error {
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var rounds int
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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], &c.enc[0], &c.dec[0])
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return nil
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}
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func (c *AESAsm) BlockSize() int { return BlockSize }
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func (c *AESAsm) 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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if InexactOverlap(dst[:BlockSize], src[:BlockSize]) {
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panic("crypto/aes: invalid buffer overlap")
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}
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encryptBlockAsm(len(c.enc)/4-1, &c.enc[0], &dst[0], &src[0])
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}
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func (c *AESAsm) 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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if InexactOverlap(dst[:BlockSize], src[:BlockSize]) {
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panic("crypto/aes: invalid buffer overlap")
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}
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decryptBlockAsm(len(c.dec)/4-1, &c.dec[0], &dst[0], &src[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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if utils.X86.HasAES {
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rounds := 10 // rounds needed for AES128
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switch len(key) {
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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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