GoLang使用AES CBC加密解密

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)]
}

测试代码：

package ciphers
import (
"encoding/base64"
"fmt"
"testing"
)
func TestAesCrypt_Encrypt(t *testing.T) {
var aesCrypt = AesCrypt{
Key: []byte("ABCDEFGHIJKLMNOP"),
Iv:
[]byte{0x12, 0x34, 0x56, 0x78, 0x9A, 0xBC, 0xDE, 0xF0, 0x12, 0x34, 0x56, 0x78, 0x9A, 0xBC, 0xDE, 0xF0},
}
var text = "areful1997"
result, err := aesCrypt.Encrypt([]byte(text))
if err != nil {
fmt.Println(err)
return
}
pass64 := base64.StdEncoding.EncodeToString(result)
fmt.Println(pass64)
}
func TestAesCrypt_Decrypt(t *testing.T) {
var aesCrypt = AesCrypt{
Key: []byte("ABCDEFGHIJKLMNOP"),
Iv:
[]byte{0x12, 0x34, 0x56, 0x78, 0x9A, 0xBC, 0xDE, 0xF0, 0x12, 0x34, 0x56, 0x78, 0x9A, 0xBC, 0xDE, 0xF0},
}
pass64 := "8oAbgUpjro+xwDuxiGDFTQ=="
bytesPass, err := base64.StdEncoding.DecodeString(pass64)
if err != nil {
fmt.Println(err)
return
}
plainText, err := aesCrypt.Decrypt(bytesPass)
if err != nil {
fmt.Println(err)
return
}
fmt.Println(string(plainText))
}