php中加密解密DES类的简单使用方法示例
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
在这里插入图片描述
代码1:
- 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 * $pad );
- }
- }
Deprecated: Methods with the same name as their class will not be constructors in a future version of PHP; DES5 has a deprecated constructor in D:\phpstudy_pro\WWW\des\DES5.php on line 2
Fatal error: Uncaught Error: Call to undefined function mcrypt_get_block_size() in D:\phpstudy_pro\WWW\des\DES5.php:19 Stack trace: #0 D:\phpstudy_pro\WWW\des\1.php(10): DES5->encrypt('podsmia') #1 {main} thrown in D:\phpstudy_pro\WWW\des\DES5.php on line 19
mcrypt_cbc 以 CBC 模式加解密数据, 在PHP 5.5.0+被弃用, PHP 7.0.0被移除
mcrypt_encrypt / mcrypt_decrypt 使用给定参数加密 / 解密, 在PHP 7.1.0+被弃用, 在PHP 7.2.0+被移除
代码2:
- class DES7
- {
- //要改的加密, 使用 openssl
- public function desEncrypt($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);
- }
- }