aes

aesx/aesx.go

@@ -58,24 +58,24 @@ plaintext：加密明文
 ciphertext:解密返回字节字符串[ 整型以十六进制方式显示]
 */
 func AESCBCEncrypt(key, plaintext string) (ciphertext string, err error) {
-	plainbyte := []byte(plaintext)
+
-	keybyte := []byte(key)
+	block, err := aes.NewCipher([]byte(key))
-	if len(plainbyte)%aes.BlockSize != 0 {
-		return "",errors.New ("plaintext is not a multiple of the block size")
-	}
-	block, err := aes.NewCipher(keybyte)
 	if err != nil {
 		return "", err
 	}
 
-	cipherbyte := make([]byte, aes.BlockSize+len(plainbyte))
+	padding := aes.BlockSize - (len(plaintext) % aes.BlockSize)
+	padtest := bytes.Repeat([]byte{byte(padding)}, padding)
+	plainBytes := append([]byte(plaintext), padtest...)
+
+	cipherbyte := make([]byte, aes.BlockSize+len(plainBytes))
 	iv := cipherbyte[:aes.BlockSize]
 	if _, err := io.ReadFull(rand.Reader, iv); err != nil {
 		return "", err
 	}
 
 	mode := cipher.NewCBCEncrypter(block, iv)
-	mode.CryptBlocks(cipherbyte[aes.BlockSize:], plainbyte)
+	mode.CryptBlocks(cipherbyte[aes.BlockSize:], plainBytes)
 
 	ciphertext = fmt.Sprintf("%x\n", cipherbyte)
 	return