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host_passport.go
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/
host_passport.go
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// Copyright 2019-2020 Axetroy. All rights reserved. Apache License 2.0.
package crypto
import (
"bytes"
"crypto/aes"
"crypto/cipher"
"encoding/base64"
)
// 加密
func EncryptHostPassport(plaintext, secret string) string {
return AesEncrypt(plaintext, secret)
}
// 解密
func DecryptHostPassport(ciptext, secret string) string {
return AesDecrypt(ciptext, secret)
}
func AesEncrypt(plaintext string, key string) string {
// 转成字节数组
origData := []byte(plaintext)
k := []byte(key)
// 分组秘钥
block, _ := aes.NewCipher(k)
// 获取秘钥块的长度
blockSize := block.BlockSize()
// 补全码
origData = PKCS7Padding(origData, blockSize)
// 加密模式
blockMode := cipher.NewCBCEncrypter(block, k[:blockSize])
// 创建数组
cryted := make([]byte, len(origData))
// 加密
blockMode.CryptBlocks(cryted, origData)
//使用RawURLEncoding 不要使用StdEncoding
//不要使用StdEncoding 放在url参数中回导致错误
return base64.RawURLEncoding.EncodeToString(cryted)
}
func AesDecrypt(cryted string, key string) string {
//使用RawURLEncoding 不要使用StdEncoding
//不要使用StdEncoding 放在url参数中回导致错误
crytedByte, _ := base64.RawURLEncoding.DecodeString(cryted)
k := []byte(key)
// 分组秘钥
block, _ := aes.NewCipher(k)
// 获取秘钥块的长度
blockSize := block.BlockSize()
// 加密模式
blockMode := cipher.NewCBCDecrypter(block, k[:blockSize])
// 创建数组
orig := make([]byte, len(crytedByte))
// 解密
blockMode.CryptBlocks(orig, crytedByte)
// 去补全码
orig = PKCS7UnPadding(orig)
return string(orig)
}
//补码
func PKCS7Padding(ciphertext []byte, blocksize int) []byte {
padding := blocksize - len(ciphertext)%blocksize
padtext := bytes.Repeat([]byte{byte(padding)}, padding)
return append(ciphertext, padtext...)
}
//去码
func PKCS7UnPadding(origData []byte) []byte {
length := len(origData)
unpadding := int(origData[length-1])
return origData[:(length - unpadding)]
}