Golang Aes 加密示例

Aes加密的一个示例。供各位参考.

package main
import (
  "crypto/aes"
  "crypto/cipher"
  "fmt"
)
func main() {
  aesEnc := AesEncrypt{}
  arrEncrypt, err := aesEnc.Encrypt("abcde")
  if err != nil {
    fmt.Println(arrEncrypt)
    return
  }
  strMsg, err := aesEnc.Decrypt(arrEncrypt)
  if err != nil {
    fmt.Println(arrEncrypt)
    return
  }
  fmt.Println(strMsg)
}
type AesEncrypt struct {
}
func (this *AesEncrypt) getKey() []byte {
  strKey := "1234567890123456"
  keyLen := len(strKey)
  if keyLen < 16 {
    panic("res key 长度不能小于16")
  }
  arrKey := []byte(strKey)
  if keyLen >= 32 {
    //取前32个字节
    return arrKey[:32]
  }
  if keyLen >= 24 {
    //取前24个字节
    return arrKey[:24]
  }
  //取前16个字节
  return arrKey[:16]
}
//加密字符串
func (this *AesEncrypt) Encrypt(strMesg string) ([]byte, error) {
  key := this.getKey()
  var iv = []byte(key)[:aes.BlockSize]
  encrypted := make([]byte, len(strMesg))
  aesBlockEncrypter, err := aes.NewCipher(key)
  if err != nil {
    return nil, err
  }
  aesEncrypter := cipher.NewCFBEncrypter(aesBlockEncrypter, iv)
  aesEncrypter.XORKeyStream(encrypted, []byte(strMesg))
  return encrypted, nil
}
//解密字符串
func (this *AesEncrypt) Decrypt(src []byte) (strDesc string, err error) {
  defer func() {
    //错误处理
    if e := recover(); e != nil {
      err = e.(error)
    }
  }()
  key := this.getKey()
  var iv = []byte(key)[:aes.BlockSize]
  decrypted := make([]byte, len(src))
  var aesBlockDecrypter cipher.Block
  aesBlockDecrypter, err = aes.NewCipher([]byte(key))
  if err != nil {
    return "", err
  }
  aesDecrypter := cipher.NewCFBDecrypter(aesBlockDecrypter, iv)
  aesDecrypter.XORKeyStream(decrypted, src)
  return string(decrypted), nil
}

本文来自:开源中国博客

感谢作者:王岩0001

查看原文:Golang Aes 加密示例

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