1. python版本
python
import base64
from Crypto.Cipher import AES
from Crypto.Util.Padding import pad, unpad
class AESUtilCBC:
def __init__(self, key, iv):
self.key = key.encode('utf-8')
self.iv = iv.encode('utf-8')
self.pad_length = AES.block_size
def encrypt(self, data):
try:
data = data.encode('utf-8')
cipher = AES.new(self.key, AES.MODE_CBC, self.iv)
padded_data = pad(data, self.pad_length, style='pkcs7')
encrypted_data = cipher.encrypt(padded_data)
encoded_data = base64.b64encode(encrypted_data).decode('utf-8')
return encoded_data
except Exception as e:
raise Exception(f"Encryption failed: {str(e)}")
def decrypt(self, encrypted_data):
try:
encrypted_bytes = base64.b64decode(encrypted_data)
cipher = AES.new(self.key, AES.MODE_CBC, self.iv)
decrypted_data = cipher.decrypt(encrypted_bytes)
unpadded_data = unpad(decrypted_data, self.pad_length, style='pkcs7')
return unpadded_data.decode('utf-8')
except Exception as e:
raise Exception(f"Decryption failed: {str(e)}")
# 示例使用 AESUtilCBC 类进行加密和解密
# 定义密钥和初始向量(IV)
key = 'Nhic0EAJqsIdMBfs' # 16字节的密钥
iv = 'Nhic0EAJqsIdMBfs' # 16字节的初始向量
# 创建 AESUtilCBC 类的实例
aes_util = AESUtilCBC(key, iv)
# 要加密的数据
data = '123456'
# 调用加密方法
encrypted_data = aes_util.encrypt(data)
print(f"加密后的数据: {encrypted_data}")
# 调用解密方法
decrypted_data = aes_util.decrypt(encrypted_data)
print(f"解密后的数据: {decrypted_data}")
执行以后是
加密后的数据: Qun8LbhlewyVvRQDzrNCIQ==
解密后的数据: 123456
2. php代码
php
<?php
use Exception;
class AESUtilCBC
{
private $key = 'Nhic0EAJqsIdMBfs';
private $iv = 'Nhic0EAJqsIdMBfs';
private $algo = 'AES-128-CBC';
private $options = OPENSSL_RAW_DATA;
public function __construct($key = null, $iv = null, $algo = null, $options = null)
{
if ($key) {
$this->key = $key;
}
if ($iv) {
$this->iv = $iv;
}
if ($algo) {
$this->algo = $algo;
}
if ($options) {
$this->options = $options;
}
}
/**
* 加密
*
* @param $data
* @return false|string
*/
public function encrypt($data)
{
try {
$encryptedData = openssl_encrypt($data, $this->algo, $this->key, $this->options, $this->iv);
return base64_encode($encryptedData);
} catch (Exception $e) {
return false;
}
}
/**
* 解密
*
* @param $encryptedData
* @return false|string
*/
public function decrypt($encryptedData)
{
try {
$decodedData = base64_decode($encryptedData);
return openssl_decrypt($decodedData, $this->algo, $this->key, $this->options, $this->iv);
} catch (Exception $e) {
return false;
}
}
}
$encrypted_data = (new AESUtilCBC())->encrypt('123456');
print("加密后的数据: {$encrypted_data}<br>");
$decrypted_data = (new AESUtilCBC())->decrypt($encrypted_data);
print("解密后的数据: {$decrypted_data}");
执行以后是
加密后的数据: Qun8LbhlewyVvRQDzrNCIQ==
解密后的数据: 123456
3. 其他
1. 在线测试
可以在一些在线网站来进行测试是否加密一致
例如 https://www.ssleye.com/ssltool/aes_cipher.html
2. 128 256 php和python如何修改
php: $algo可以设置为 AES-128-CBC,AES-256-CBC
python:根据 key 的长度而变化,16位为128, 32位为256
3. iv长度
iv长度必须为16位,key和iv允许一致
4. 加密不一致
如果key的长度不足16或者32位,在php或python代码中进行补全空位,如果补全长度的字符不一致,则会导致加密的不一致
5. php 修改模式
修改 AES-128-CBC 的 CBC 为 ECB 等