时间:2021-07-01 10:21:17 帮助过:17人阅读
- <?php
- class MCrypt {
- private $hex_iv = '00000000000000000000000000000000'; # converted JAVA byte code in to HEX and placed it here
- private $key = 'U1MjU1M0FDOUZ.Qz'; #Same as in JAVA
- function construct() {
- $this->key = hash('sha256', $this->key, true);
- //echo $this->key.'<br/>';
- }
- function encrypt($str) {
- $td = mcrypt_module_open(MCRYPT_RIJNDAEL_128, '', MCRYPT_MODE_CBC, '');
- mcrypt_generic_init($td, $this->key, $this->hexToStr($this->hex_iv));
- $block = mcrypt_get_block_size(MCRYPT_RIJNDAEL_128, MCRYPT_MODE_CBC);
- $pad = $block - (strlen($str) % $block);
- $str .= str_repeat(chr($pad), $pad);
- $encrypted = mcrypt_generic($td, $str);
- mcrypt_generic_deinit($td);
- mcrypt_module_close($td);
- return base64_encode($encrypted);
- }
- function decrypt($code) {
- $td = mcrypt_module_open(MCRYPT_RIJNDAEL_128, '', MCRYPT_MODE_CBC, '');
- mcrypt_generic_init($td, $this->key, $this->hexToStr($this->hex_iv));
- $str = mdecrypt_generic($td, base64_decode($code));
- $block = mcrypt_get_block_size(MCRYPT_RIJNDAEL_128, MCRYPT_MODE_CBC);
- mcrypt_generic_deinit($td);
- mcrypt_module_close($td);
- return $this->strippadding($str);
- }
- /*
- For PKCS7 padding
- */
- private function addpadding($string, $blocksize = 16) {
- $len = strlen($string);
- $pad = $blocksize - ($len % $blocksize);
- $string .= str_repeat(chr($pad), $pad);
- return $string;
- }
- private function strippadding($string) {
- $slast = ord(substr($string, -1));
- $slastc = chr($slast);
- $pcheck = substr($string, -$slast);
- if (preg_match("/$slastc{" . $slast . "}/", $string)) {
- $string = substr($string, 0, strlen($string) - $slast);
- return $string;
- } else {
- return false;
- }
- }
- function hexToStr($hex)
- {
- $string='';
- for ($i=0; $i < strlen($hex)-1; $i+=2)
- {
- $string .= chr(hexdec($hex[$i].$hex[$i+1]));
- }
- return $string;
- }
- }
- $encryption = new MCrypt();
- echo $encryption->encrypt('123456') . "<br/>";
- echo $encryption->decrypt('tpyxISJ83dqEs3uw8bN/+w==');
- ?>
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