```
import (
"bytes"
"crypto/aes"
"fmt"
"crypto/cipher"
"encoding/base64"
)
func main() {
orig := "hello world"
key := "123456781234567812345678"
fmt.Println("原文：", orig)
encryptCode := AesEncrypt(orig, key)
fmt.Println("密文：" , encryptCode)
decryptCode := AesDecrypt(encryptCode, key)
fmt.Println("解密结果：", decryptCode)
}
func AesEncrypt(orig string, key string) string {
// 转成字节数组
origData := []byte(orig)
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)
return base64.StdEncoding.EncodeToString(cryted)
}
func AesDecrypt(cryted string, key string) string {
// 转成字节数组
crytedByte, _ := base64.StdEncoding.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)]
}
```
参考：
https://www.jb51.net/article/245521.htm
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