132 lines
3.4 KiB
Go
132 lines
3.4 KiB
Go
/***************************************************
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** @Desc : This file for ...
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** @Time : 2018-8-30 13:50
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** @Author : Joker
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** @File : ACE_ECB
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** @Last Modified by : Joker
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** @Last Modified time: 2018-8-30 13:50
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** @Software: GoLand
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****************************************************/
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package utils
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import (
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"bytes"
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"crypto/aes"
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"crypto/cipher"
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"encoding/hex"
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"github.com/astaxie/beego/logs"
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)
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/*
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aes解码
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crypted:要加密的字符串
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key:用来加密的密钥 密钥长度可以是128bit、192bit、256bit中的任意一个
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16位key对应128bit
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*/
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func AesDecrypt(src, key []byte) []byte {
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block, err := aes.NewCipher(key)
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if err != nil {
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logs.Error("Joker: AesDecrypt failed to NewCipher")
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logs.Error(err)
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}
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blockMode := NewECBDecrypter(block)
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origData := make([]byte, len(src))
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blockMode.CryptBlocks(origData, src)
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origData = PKCS5UnPadding(origData)
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return origData
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}
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/*aes编码*/
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func AesEncrypt(src []byte, key string) []byte {
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decodeString, err := hex.DecodeString(key)
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if err != nil {
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logs.Error("Joker: AesEncrypt failed to hex key")
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logs.Error(err)
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}
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block, err := aes.NewCipher(decodeString)
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if err != nil {
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logs.Error("Joker: AesEncrypt failed to NewCipher")
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logs.Error(err)
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}
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if len(src) < 0 {
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logs.Error("Joker: AesEncrypt`s input is null ")
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}
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ecb := NewECBEncrypter(block)
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src = PKCS5Padding(src, block.BlockSize())
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crypted := make([]byte, len(src))
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ecb.CryptBlocks(crypted, src)
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// 普通base64编码加密 区别于urlsafe base64
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//fmt.Println("base64 result:", base64.StdEncoding.EncodeToString(crypted))
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//fmt.Println("base64UrlSafe result:", Base64UrlSafeEncode(crypted))
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return crypted
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}
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func PKCS5Padding(ciphertext []byte, blockSize int) []byte {
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padding := blockSize - len(ciphertext)%blockSize
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padtext := bytes.Repeat([]byte{byte(padding)}, padding)
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return append(ciphertext, padtext...)
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}
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func PKCS5UnPadding(origData []byte) []byte {
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length := len(origData)
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// 去掉最后一个字节 unpadding 次
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unpadding := int(origData[length-1])
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return origData[:(length - unpadding)]
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}
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type ecb struct {
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b cipher.Block
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blockSize int
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}
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func newECB(b cipher.Block) *ecb {
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return &ecb{
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b: b,
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blockSize: b.BlockSize(),
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}
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}
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type ecbEncrypter ecb
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// NewECBEncrypter returns a BlockMode which encrypts in electronic code book
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// mode, using the given Block.
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func NewECBEncrypter(b cipher.Block) cipher.BlockMode {
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return (*ecbEncrypter)(newECB(b))
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}
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func (x *ecbEncrypter) BlockSize() int { return x.blockSize }
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func (x *ecbEncrypter) CryptBlocks(dst, src []byte) {
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if len(src)%x.blockSize != 0 {
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logs.Error("Joker: CryptBlocks`s input not full blocks")
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}
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if len(dst) < len(src) {
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logs.Error("Joker: CryptBlocks`s output smaller than input")
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}
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for len(src) > 0 {
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x.b.Encrypt(dst, src[:x.blockSize])
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src = src[x.blockSize:]
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dst = dst[x.blockSize:]
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}
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}
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type ecbDecrypter ecb
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// NewECBDecrypter returns a BlockMode which decrypts in electronic code book
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// mode, using the given Block.
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func NewECBDecrypter(b cipher.Block) cipher.BlockMode {
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return (*ecbDecrypter)(newECB(b))
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}
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func (x *ecbDecrypter) BlockSize() int { return x.blockSize }
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func (x *ecbDecrypter) CryptBlocks(dst, src []byte) {
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if len(src)%x.blockSize != 0 {
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logs.Error("Joker: CryptBlocks`s input not full blocks")
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}
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if len(dst) < len(src) {
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logs.Error("Joker: CryptBlocks`s output smaller than input")
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}
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for len(src) > 0 {
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x.b.Decrypt(dst, src[:x.blockSize])
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src = src[x.blockSize:]
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dst = dst[x.blockSize:]
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}
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}
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