本文實例講述了php中加密解密des類的簡單使用方法。分享給大家供大家參考，具體如下：
在平時的開發工作中，我們經常會對關鍵字符進行加密，可能為了安全 也可能為了規范，所以要正確使用des加密解密
代碼1:
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class des{ var $key; // 密鑰 var $iv; // 偏移量 function __construct( $key, $iv=0 ) { $this->key = $key; if( $iv == 0 ) { $this->iv = $key; } else { $this->iv = $iv; // 創建初始向量, 并且檢測密鑰長度, windows 平臺請使用 mcrypt_rand // mcrypt_create_iv ( mcrypt_get_block_size (mcrypt_des, mcrypt_mode_cbc), mcrypt_dev_random ); } } function encrypt($str) { //加密，返回大寫十六進制字符串 $size = mcrypt_get_block_size ( mcrypt_des, mcrypt_mode_cbc ); $str = $this->pkcs5pad ( $str, $size ); // bin2hex 把 ascii 字符的字符串轉換為十六進制值 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 * $pad ); }} |
deprecated: methods with the same name as their class will not be constructors in a future version of php; des5 has a deprecated constructor in d:\phpstudy_pro\www\des\des5.php on line 2
fatal error: uncaught error: call to undefined function mcrypt_get_block_size() in d:\phpstudy_pro\www\des\des5.php:19 stack trace: #0 d:\phpstudy_pro\www\des\1.php(10): des5->encrypt('podsmia') #1 {main} thrown in d:\phpstudy_pro\www\des\des5.php on line 19
- mcrypt_cbc 以 cbc 模式加解密數據, 在php 5.5.0+被棄用, php 7.0.0被移除
- mcrypt_encrypt / mcrypt_decrypt 使用給定參數加密 / 解密, 在php 7.1.0+被棄用, 在php 7.2.0+被移除
代碼2:
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class des7{ //要改的加密, 使用 openssl public function desencrypt($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); }} |
希望本文所述對大家PHP程序設計有所幫助。
原文鏈接：https://blog.csdn.net/qq_36261130/article/details/104015050
