PHP使用AES方式进行加密、解密。
使用openssl_encrypt函数进行加密：
openssl_encrypt ( string $data , string $method , string $key [, int $options = 0 [, string $iv = "" [, string &$tag = NULL [, string $aad = "" [, int $tag_length = 16 ]]]]] ) : string
参数$method - 加密方法，可选值DES-ECB、DES-CBC、DES-CTR、DES-OFB、DES-CFB
参数$options - 操作，可选值0、OPENSSL_RAW_DATA=1、OPENSSL_ZERO_PADDING=2、OPENSSL_NO_PADDING=3
OPENSSL_RAW_DATA方式，会用PKCS#7进行补位
OPENSSL_ZERO_PADDING方式，会用0进行补位
与前端交互只能使用OPENSSL_RAW_DATA和OPENSSL_ZERO_PADDING方式
参数$key和$iv只能是16位，超过16位PHP加密失败，非16位，前端解密失败。如果加密方法是DES-ECB，则iv必须为空。
很多加密方法加密的结果是乱码，所以需要对结果进行base64编码，前端拿到直接解密，不需要base64解码。
PHP加密解密代码：
<?phpclass Aes {protected $method = 'AES-128-CBC';protected $secret_key = 'Sd2@s.f9)_2o6dpu';protected $options = OPENSSL_RAW_DATA;public function encrypt($data) {$ivlen = openssl_cipher_iv_length($this->method);$iv = openssl_random_pseudo_bytes($ivlen);$iv = bin2hex($iv);if(strlen($iv) > $ivlen) {$iv = substr($iv, 0, $ivlen);}if(is_array($data)) {$data = json_encode($data);}$sign = openssl_encrypt($data, $this->method, $this->secret_key, $this->options, $iv);$sign = base64_encode($sign);return array('sign' => $sign, 'iv' => $iv);}public function decrypt($sign, $iv) {return openssl_decrypt($sign, $this->method, $this->secret_key, $this->options, $iv);}}$aes = new Aes;
$content = array('name' => 'test', 'sex' => 'man');
$result = $aes->encrypt($content);
print_r($result);$data = $aes->decrypt(base64_decode($result['sign']), $result['iv']);
print_r($data);
打印出加密结果是：
Array
(
[sign] => SeZA9+1qK1jsEiPlUC9Rlus8g91Kqm6V8aDV1au5y0Q=
[iv] => 8c30406e5d51d4bc
)
前端解密需要用到CryptoJS，下载地址https://github.com/sytelus/CryptoJS
前端解密代码：
<!DOCTYPE html>
<html>
<head><title></title><script src="./CryptoJS-master/rollups/aes.js"></script><script src="./CryptoJS-master/components/mode-ecb.js"></script><script src="./CryptoJS-master/components/pad-nopadding.js"></script><script type="text/javascript">var sign = "SeZA9+1qK1jsEiPlUC9Rlus8g91Kqm6V8aDV1au5y0Q=";var iv = "8c30406e5d51d4bc";iv = CryptoJS.enc.Utf8.parse(iv);var key = "Sd2@s.f9)_2o6dpu";key = CryptoJS.enc.Utf8.parse(key);var decrypted = CryptoJS.AES.decrypt(sign, key, {iv: iv,mode: CryptoJS.mode.CBC,padding : CryptoJS.pad.Pkcs7});decrypted = decrypted.toString(CryptoJS.enc.Utf8);console.log('decrypted', decrypted);</script>
</head>
<body></body>
</html>
