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PHP实现的DES加密解密实例代码_PHP

WBOY
WBOYOriginal
2016-05-28 11:46:41894browse

本文实例讲述了PHP实现的DES加密解密实例。分享给大家供大家参考,具体如下:

<?php
$key = 'very important data';
function jiami($key, $str)
{
  /* Open module, and create IV */
  $td = mcrypt_module_open('des', '', 'ecb', '');
  //$td = mcrypt_module_open(MCRYPT_DES, '', MCRYPT_MODE_CBC, '');
  //$td = mcrypt_module_open('des', '', 'cbc', '');
  $key = substr($key, 0, mcrypt_enc_get_key_size($td));
  $iv_size = mcrypt_enc_get_iv_size($td);
  $iv = mcrypt_create_iv($iv_size, MCRYPT_RAND);
  /* Initialize encryption handle */
  if (mcrypt_generic_init($td, $key, $iv) === -1)
  {
    return FALSE;
  }
  /* Encrypt data */
  $c_t = mcrypt_generic($td, $str);
  /* Clean up */
  mcrypt_generic_deinit($td);
  mcrypt_module_close($td);
  return $c_t;
}
function jiemi($key, $str)
{
  /* Open module, and create IV */
  $td = mcrypt_module_open('des', '', 'ecb', '');
  //$td = mcrypt_module_open(MCRYPT_DES, '', MCRYPT_MODE_CBC, '');
  //$td = mcrypt_module_open('des', '', 'cbc', '');
  $key = substr($key, 0, mcrypt_enc_get_key_size($td));
  $iv_size = mcrypt_enc_get_iv_size($td);
  $iv = mcrypt_create_iv($iv_size, MCRYPT_RAND);
  /* Initialize encryption handle */
  if (mcrypt_generic_init($td, $key, $iv) === -1)
  {
    return FALSE;
  }
  /* Reinitialize buffers for decryption */
  $p_t = mdecrypt_generic($td, $str);
  /* Clean up */
  mcrypt_generic_deinit($td);
  mcrypt_module_close($td);
  return trim($p_t);
}
$str = 'hello world!';
echo 'key:' . $key . '
'; echo 'str:' . $str . '
'; $jiami = jiami($key, $str); echo '加密:' . $jiami . '
'; file_put_contents('jiamiqian.txt', $str); file_put_contents('jiamihou.txt', $jiami); $jiemi = jiemi($key, $jiami); echo '解密:' . $jiemi . '
';

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希望本文所述对大家PHP程序设计有所帮助。

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