AES CBC实现：
package ciphers
import (
"bytes"
"crypto/aes"
"crypto/cipher"
)
type AesCrypt struct {
Key []byte
Iv []byte
}
func (a *AesCrypt) Encrypt(data []byte) ([]byte, error) {
aesBlockEncrypt, err := aes.NewCipher(a.Key)
if err != nil {
println(err.Error())
return nil, err
}
content := pKCS5Padding(data, aesBlockEncrypt.BlockSize())
cipherBytes := make([]byte, len(content))
aesEncrypt := cipher.NewCBCEncrypter(aesBlockEncrypt, a.Iv)
aesEncrypt.CryptBlocks(cipherBytes, content)
return cipherBytes, nil
}
func (a *AesCrypt) Decrypt(src []byte) (data []byte, err error) {
decrypted := make([]byte, len(src))
var aesBlockDecrypt cipher.Block
aesBlockDecrypt, err = aes.NewCipher(a.Key)
if err != nil {
println(err.Error())
return nil, err
}
aesDecrypt := cipher.NewCBCDecrypter(aesBlockDecrypt, a.Iv)
aesDecrypt.CryptBlocks(decrypted, src)
return pKCS5Trimming(decrypted), nil
}
func pKCS5Padding(cipherText []byte, blockSize int) []byte {
padding := blockSize - len(cipherText)%blockSize
padText := bytes.Repeat([]byte{byte(padding)}, padding)
return append(cipherText, padText...)
}
func pKCS5Trimming(encrypt []byte) []byte {
padding := encrypt[len(encrypt)-1]
return encrypt[:len(encrypt)-int(padding)]
}