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  • php des加密

    http://www.jb51.net/article/56410.htm

    class DES
    {
     var $key;
     var $iv; //偏移量
     
     function DES( $key, $iv=0 ) {
     //key长度8例如:1234abcd
      $this->key = $key;
      if( $iv == 0 ) {
       $this->iv = $key;
      } else {
       $this->iv = $iv; //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 );
      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 );
     }
    }
    
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  • 原文地址:https://www.cnblogs.com/yangbanban/p/5116594.html
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