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
}
