<?php // =============================================================================== /* * lvesu.com * Note: * 加解密 * */ // =============================================================================== class Crypt3Des { 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 * @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 * @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); } }
最新评论: