Gecko [ 167.86.127.34 ]

Name	Size	Permission
aes_gcm.go	5.72 KB	-rw-r--r--
aes_test.go	11.3 KB	-rw-r--r--
asm_amd64.s	5.4 KB	-rw-r--r--
asm_arm64.s	6.86 KB	-rw-r--r--
asm_ppc64le.s	20.17 KB	-rw-r--r--
asm_s390x.s	4.38 KB	-rw-r--r--
block.go	6.5 KB	-rw-r--r--
cbc_s390x.go	1.57 KB	-rw-r--r--
cipher.go	1.85 KB	-rw-r--r--
cipher_asm.go	2.32 KB	-rw-r--r--
cipher_generic.go	740 B	-rw-r--r--
cipher_ppc64le.go	2.07 KB	-rw-r--r--
cipher_s390x.go	2.6 KB	-rw-r--r--
const.go	29.32 KB	-rw-r--r--
ctr_s390x.go	2.44 KB	-rw-r--r--
gcm_amd64.s	23.42 KB	-rw-r--r--
gcm_arm64.s	21.52 KB	-rw-r--r--
gcm_ppc64le.go	6.7 KB	-rw-r--r--
gcm_ppc64le.s	12.78 KB	-rw-r--r--
gcm_s390x.go	11.35 KB	-rw-r--r--
modes.go	1.15 KB	-rw-r--r--
modes_test.go	3.48 KB	-rw-r--r--

Code Editor : cipher_asm.go

// 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 arm64

package aes

import (
	"crypto/cipher"
	"crypto/internal/subtle"
	"internal/cpu"
)

// defined in asm_*.s

//go:noescape
func encryptBlockAsm(nr int, xk *uint32, dst, src *byte)

//go:noescape
func decryptBlockAsm(nr int, xk *uint32, dst, src *byte)

//go:noescape
func expandKeyAsm(nr int, key *byte, enc *uint32, dec *uint32)

type aesCipherAsm struct {
	aesCipher
}

var supportsAES = cpu.X86.HasAES || cpu.ARM64.HasAES
var supportsGFMUL = cpu.X86.HasPCLMULQDQ || cpu.ARM64.HasPMULL

func newCipher(key []byte) (cipher.Block, error) {
	if !supportsAES {
		return newCipherGeneric(key)
	}
	n := len(key) + 28
	c := aesCipherAsm{aesCipher{make([]uint32, n), make([]uint32, n)}}
	var rounds int
	switch len(key) {
	case 128 / 8:
		rounds = 10
	case 192 / 8:
		rounds = 12
	case 256 / 8:
		rounds = 14
	}

expandKeyAsm(rounds, &key[0], &c.enc[0], &c.dec[0])
	if supportsAES && supportsGFMUL {
		return &aesCipherGCM{c}, nil
	}
	return &c, nil
}

func (c *aesCipherAsm) BlockSize() int { return BlockSize }

func (c *aesCipherAsm) Encrypt(dst, src []byte) {
	if len(src) < BlockSize {
		panic("crypto/aes: input not full block")
	}
	if len(dst) < BlockSize {
		panic("crypto/aes: output not full block")
	}
	if subtle.InexactOverlap(dst[:BlockSize], src[:BlockSize]) {
		panic("crypto/aes: invalid buffer overlap")
	}
	encryptBlockAsm(len(c.enc)/4-1, &c.enc[0], &dst[0], &src[0])
}

func (c *aesCipherAsm) Decrypt(dst, src []byte) {
	if len(src) < BlockSize {
		panic("crypto/aes: input not full block")
	}
	if len(dst) < BlockSize {
		panic("crypto/aes: output not full block")
	}
	if subtle.InexactOverlap(dst[:BlockSize], src[:BlockSize]) {
		panic("crypto/aes: invalid buffer overlap")
	}
	decryptBlockAsm(len(c.dec)/4-1, &c.dec[0], &dst[0], &src[0])
}

// expandKey is used by BenchmarkExpand to ensure that the asm implementation
// of key expansion is used for the benchmark when it is available.
func expandKey(key []byte, enc, dec []uint32) {
	if supportsAES {
		rounds := 10 // rounds needed for AES128
		switch len(key) {
		case 192 / 8:
			rounds = 12
		case 256 / 8:
			rounds = 14
		}
		expandKeyAsm(rounds, &key[0], &enc[0], &dec[0])
	} else {
		expandKeyGo(key, enc, dec)
	}
}

${this.title}

Code Editor : cipher_asm.go