PHP如何实现AES加密、解密？方法介绍（代码示例）

class Lib_desEnctyp { private $key = ""; private $iv = ""; /** * 构造，传递二个已经进行base64_encode的KEY与IV * * @param string $key * @param string $iv */ function __construct ($key, $iv) { if (empty($key) || empty($iv)) { echo 'key and iv is not valid'; exit(); } $this->key = $key; $this->iv = $iv; } /** *加密 * @param  $value * @return  */ public function encrypt ($value) { $td = mcrypt_module_open(MCRYPT_3DES, '', MCRYPT_MODE_CBC, ''); $iv = base64_decode($this->iv); $value = $this->PaddingPKCS7($value); $key = base64_decode($this->key); mcrypt_generic_init($td, $key, $iv); $ret = base64_encode(mcrypt_generic($td, $value)); mcrypt_generic_deinit($td); mcrypt_module_close($td); return $ret; } /** *解密 * @param  $value * @return  */ public function decrypt ($value) { $td = mcrypt_module_open(MCRYPT_3DES, '', MCRYPT_MODE_CBC, ''); $iv = base64_decode($this->iv); $key = base64_decode($this->key); mcrypt_generic_init($td, $key, $iv); $ret = trim(mdecrypt_generic($td, base64_decode($value))); $ret = $this->UnPaddingPKCS7($ret); mcrypt_generic_deinit($td); mcrypt_module_close($td); return $ret; } private function PaddingPKCS7 ($data) { $block_size = mcrypt_get_block_size('tripledes', 'cbc'); $padding_char = $block_size - (strlen($data) % $block_size); $data .= str_repeat(chr($padding_char), $padding_char); return $data; } private function UnPaddingPKCS7($text) { $pad = ord($text{strlen($text) - 1}); if ($pad > strlen($text)) { return false; } if (strspn($text, chr($pad), strlen($text) - $pad) != $pad) { return false; } return substr($text, 0, - 1 * $pad); } }

/** * DES加密类 * User: gaowei * Date: 2017/12/12 * Time: 19:23 */ class DesEncrypt { private $key = ""; private $iv = ""; /** * 构造，传递二个已经进行base64_encode的KEY与IV * * @param string $key * @param string $iv */ function __construct ($key, $iv) { if (empty($key) || empty($iv)) { echo 'key and iv is not valid'; exit(); } $this->key = $key; $this->iv = $iv;//8 //$this->iv = $iv.'00000000000';//16 } /** * @title 加密 * @author gaowei * @date 2017/12/18 * @param string $value 要传的参数 * @ //OPENSSL_RAW_DATA|OPENSSL_ZERO_PADDING //AES-128-ECB|AES-256-CBC|BF-CBC * @return json * */ public function encrypt ($value) { //参考地址：https://stackoverflow.com/questions/41181905/php-mcrypt-encrypt-to-openssl-encrypt-and-openssl-zero-padding-problems# $value = $this->PaddingPKCS7($value); $key = base64_decode($this->key); $iv = base64_decode($this->iv); //AES-128-ECB|不能用 AES-256-CBC|16 AES-128-CBC|16 BF-CBC|8 aes-128-gcm|需要加$tag DES-EDE3-CBC|8 $cipher = "DES-EDE3-CBC"; if (in_array($cipher, openssl_get_cipher_methods())) { //$ivlen = openssl_cipher_iv_length($cipher); // $iv = openssl_random_pseudo_bytes($ivlen); $result = openssl_encrypt($value, $cipher, $key, OPENSSL_SSLV23_PADDING, $iv); //$result = base64_encode($result); //为3的时间要用 //store $cipher, $iv, and $tag for decryption later /* $original_plaintext = openssl_decrypt($result, $cipher, $key, OPENSSL_SSLV23_PADDING, $iv); echo $original_plaintext."\n";*/ } return $result; } /** * @title 解密 * @author gaowei * @date 2017/12/18 * @param string $value 要传的参数 * @return json * */ public function decrypt ($value) { $key = base64_decode($this->key); $iv = base64_decode($this->iv); $decrypted = openssl_decrypt($value, 'DES-EDE3-CBC', $key, OPENSSL_SSLV23_PADDING, $iv); $ret = $this->UnPaddingPKCS7($decrypted); return $ret; } private function PaddingPKCS7 ($data) { //$block_size = mcrypt_get_block_size('tripledes', 'cbc');//获取长度 //$block_size = openssl_cipher_iv_length('tripledes', 'cbc');//获取长度 $block_size = 8; $padding_char = $block_size - (strlen($data) % $block_size); $data .= str_repeat(chr($padding_char), $padding_char); return $data; } private function UnPaddingPKCS7($text) { $pad = ord($text{strlen($text) - 1}); if ($pad > strlen($text)) { return false; } if (strspn($text, chr($pad), strlen($text) - $pad) != $pad) { return false; } return substr($text, 0, - 1 * $pad); } }

/** * @desc：php aes加密解密类 * @author gl * @date 2019/08/31 */ class CI_Aes{ /** * CI_Aes cipher * @var string */ protected $cipher = 'aes-128-ecb'; /** * CI_Aes key * * @var string */ protected $key; /** * CI_Aes constructor * @param string $key Configuration parameter */ public function __construct($key=null){ $this->key = $key; } /** * Initialize * * @param array $params Configuration parameters * @return CI_Encryption */ public function initialize($params) { if (!empty($params) && is_array($params)) { foreach ($params as $key => $val) { $this->$key = $val; } } } /** * Encrypt * * @param string $data Input data * @return string */ public function encrypt($data) { $endata = openssl_encrypt($data, $this->cipher, $this->key, OPENSSL_RAW_DATA); return bin2hex($endata); } /** * Decrypt * * @param string $data Encrypted data * @return string */ public function decrypt($data) { $encrypted = hex2bin($data); return openssl_decrypt($encrypted, $this->cipher, $this->key, OPENSSL_RAW_DATA); } }

//加密函数 function lock_url($txt,$key='www.jb51.net') { $chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-=+"; $nh = rand(0,64); $ch = $chars[$nh]; $mdKey = md5($key.$ch); $mdKey = substr($mdKey,$nh%8, $nh%8+7); $txt = base64_encode($txt); $tmp = ''; $i=0;$j=0;$k = 0; for ($i=0; $i
        

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