PHP如何实现AES加密、解密？方法介绍（代码示例）
1、mcrypt_encrypt AES加密，解密
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 <type> $value
* @return <type>
*/
public function encrypt ($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 <type> $value
* @return <type>
*/
public function decrypt ($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);
}
}2、openssl 加密，解密 [方式1]
/**
* 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);
}
}3、openssl 加密，解密 [方式2]
/** * @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, $this->key, OPENSSL_RAW_DATA); } }
4、其他 加密，解密
//加密函数
function lock_url($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; $i<strlen($txt); $i++) {
$k = $k == strlen($mdKey) ? 0 : $k;
$j = ($nh+strpos($chars,$txt[$i])+ord($mdKey[$k++]))%64;
$tmp .= $chars[$j];
}
return urlencode($ch.$tmp);
}
//解密函数
function unlock_url($txt,$key='www.jb51.net')
{
$txt = urldecode($txt);
$chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-=+";
$ch = $txt[0];
$nh = strpos($chars,$ch);
$mdKey = md5($key.$ch);
$mdKey = substr($mdKey,$nh%8, $nh%8+7);
$txt = substr($txt,1);
$tmp = '';
$i=0;$j=0; $k = 0;
for ($i=0; $i<strlen($txt); $i++) {
$k = $k == strlen($mdKey) ? 0 : $k;
$j = strpos($chars,$txt[$i])-$nh - ord($mdKey[$k++]);
while ($j<0) $j+=64;
$tmp .= $chars[$j];
}
return base64_decode($tmp);
}相关教程推荐：《PHP教程》
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