dongfeng-pay/gateway/utils/AES_ECB.go

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2019-12-19 14:47:58 +08:00
/***************************************************
** @Desc : This file for ...
** @Time : 2018-8-30 13:50
** @Author : Joker
** @File : ACE_ECB
** @Last Modified by : Joker
** @Last Modified time: 2018-8-30 13:50
** @Software: GoLand
****************************************************/
package utils
import (
"bytes"
"crypto/aes"
"crypto/cipher"
"encoding/hex"
"github.com/astaxie/beego/logs"
)
/*
aes解码
crypted:要加密的字符串
key:用来加密的密钥 密钥长度可以是128bit192bit256bit中的任意一个
16位key对应128bit
*/
func AesDecrypt(src, key []byte) []byte {
block, err := aes.NewCipher(key)
if err != nil {
logs.Error("Joker: AesDecrypt failed to NewCipher")
logs.Error(err)
}
blockMode := NewECBDecrypter(block)
origData := make([]byte, len(src))
blockMode.CryptBlocks(origData, src)
origData = PKCS5UnPadding(origData)
return origData
}
/*aes编码*/
func AesEncrypt(src []byte, key string) []byte {
decodeString, err := hex.DecodeString(key)
if err != nil {
logs.Error("Joker: AesEncrypt failed to hex key")
logs.Error(err)
}
block, err := aes.NewCipher(decodeString)
if err != nil {
logs.Error("Joker: AesEncrypt failed to NewCipher")
logs.Error(err)
}
if len(src) < 0 {
logs.Error("Joker: AesEncrypt`s input is null ")
}
ecb := NewECBEncrypter(block)
src = PKCS5Padding(src, block.BlockSize())
crypted := make([]byte, len(src))
ecb.CryptBlocks(crypted, src)
// 普通base64编码加密 区别于urlsafe base64
//fmt.Println("base64 result:", base64.StdEncoding.EncodeToString(crypted))
//fmt.Println("base64UrlSafe result:", Base64UrlSafeEncode(crypted))
return crypted
}
func PKCS5Padding(ciphertext []byte, blockSize int) []byte {
padding := blockSize - len(ciphertext)%blockSize
padtext := bytes.Repeat([]byte{byte(padding)}, padding)
return append(ciphertext, padtext...)
}
func PKCS5UnPadding(origData []byte) []byte {
length := len(origData)
// 去掉最后一个字节 unpadding 次
unpadding := int(origData[length-1])
return origData[:(length - unpadding)]
}
type ecb struct {
b cipher.Block
blockSize int
}
func newECB(b cipher.Block) *ecb {
return &ecb{
b: b,
blockSize: b.BlockSize(),
}
}
type ecbEncrypter ecb
// NewECBEncrypter returns a BlockMode which encrypts in electronic code book
// mode, using the given Block.
func NewECBEncrypter(b cipher.Block) cipher.BlockMode {
return (*ecbEncrypter)(newECB(b))
}
func (x *ecbEncrypter) BlockSize() int { return x.blockSize }
func (x *ecbEncrypter) CryptBlocks(dst, src []byte) {
if len(src)%x.blockSize != 0 {
logs.Error("Joker: CryptBlocks`s input not full blocks")
}
if len(dst) < len(src) {
logs.Error("Joker: CryptBlocks`s output smaller than input")
}
for len(src) > 0 {
x.b.Encrypt(dst, src[:x.blockSize])
src = src[x.blockSize:]
dst = dst[x.blockSize:]
}
}
type ecbDecrypter ecb
// NewECBDecrypter returns a BlockMode which decrypts in electronic code book
// mode, using the given Block.
func NewECBDecrypter(b cipher.Block) cipher.BlockMode {
return (*ecbDecrypter)(newECB(b))
}
func (x *ecbDecrypter) BlockSize() int { return x.blockSize }
func (x *ecbDecrypter) CryptBlocks(dst, src []byte) {
if len(src)%x.blockSize != 0 {
logs.Error("Joker: CryptBlocks`s input not full blocks")
}
if len(dst) < len(src) {
logs.Error("Joker: CryptBlocks`s output smaller than input")
}
for len(src) > 0 {
x.b.Decrypt(dst, src[:x.blockSize])
src = src[x.blockSize:]
dst = dst[x.blockSize:]
}
}