本文实例讲述了php中加密解密des类的简单使用方法。分享给大家供大家参考,具体如下:
在平时的开发工作中,我们经常会对关键字符进行加密,可能为了安全 也可能为了规范,所以要正确使用des加密解密
代码1:
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class des { var $key ; // 密钥 var $iv ; // 偏移量 function __construct( $key , $iv =0 ) { $this ->key = $key ; if ( $iv == 0 ) { $this ->iv = $key ; } else { $this ->iv = $iv ; // 创建初始向量, 并且检测密钥长度, windows 平台请使用 mcrypt_rand // mcrypt_create_iv ( mcrypt_get_block_size (mcrypt_des, mcrypt_mode_cbc), mcrypt_dev_random ); } } function encrypt( $str ) { //加密,返回大写十六进制字符串 $size = mcrypt_get_block_size ( mcrypt_des, mcrypt_mode_cbc ); $str = $this ->pkcs5pad ( $str , $size ); // bin2hex 把 ascii 字符的字符串转换为十六进制值 return strtoupper ( bin2hex( mcrypt_cbc(mcrypt_des, $this ->key, $str , mcrypt_encrypt, $this ->iv ) ) ); } function decrypt( $str ) { //解密 $strbin = $this ->hex2bin( strtolower ( $str ) ); $str = mcrypt_cbc( mcrypt_des, $this ->key, $strbin , mcrypt_decrypt, $this ->iv ); $str = $this ->pkcs5unpad( $str ); return $str ; } function hex2bin( $hexdata ) { $bindata = "" ; for ( $i = 0; $i < strlen ( $hexdata ); $i += 2) { $bindata .= chr ( hexdec ( substr ( $hexdata , $i , 2 ) ) ); } return $bindata ; } function pkcs5pad( $text , $blocksize ) { $pad = $blocksize - ( strlen ( $text ) % $blocksize ); return $text . str_repeat ( chr ( $pad ), $pad ); } function pkcs5unpad( $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 ); } } |
deprecated: methods with the same name as their class will not be constructors in a future version of php; des5 has a deprecated constructor in d:\phpstudy_pro\www\des\des5.php on line 2
fatal error: uncaught error: call to undefined function mcrypt_get_block_size() in d:\phpstudy_pro\www\des\des5.php:19 stack trace: #0 d:\phpstudy_pro\www\des\1.php(10): des5->encrypt('podsmia') #1 {main} thrown in d:\phpstudy_pro\www\des\des5.php on line 19
- mcrypt_cbc 以 cbc 模式加解密数据, 在php 5.5.0+被弃用, php 7.0.0被移除
- mcrypt_encrypt / mcrypt_decrypt 使用给定参数加密 / 解密, 在php 7.1.0+被弃用, 在php 7.2.0+被移除
代码2:
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class des7 { //要改的加密, 使用 openssl public function desencrypt( $str , $key ) { $iv = $key ; $data = openssl_encrypt( $str , "des-cbc" , $key ,openssl_raw_data, $iv ); $data = strtolower (bin2hex( $data )); return $data ; } //要改的解密 public function desdecrypt( $str , $key ) { $iv = $key ; return openssl_decrypt (hex2bin( $str ), 'des-cbc' , $key , openssl_raw_data, $iv ); } } |
希望本文所述对大家PHP程序设计有所帮助。
原文链接:https://blog.csdn.net/qq_36261130/article/details/104015050