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Refer to the PHP encryption and decryption processing class written by discuz's passport

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Release： 2016-07-25 09:03:40
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  2. /*----------------------------------------- -
  3. = Copyright Agreement:
  4. = GPL (The GNU GENERAL PUBLIC LICENSE Version 2, June 1991)
  5. =--------------------------- ----------------------------------
  6. = File name: cls.sys_crypt.php
  7. = Summary: php encryption and decryption Processing class
  8. = Version: 1.0
  9. = Reference: Discuz forum’s passport related functions
  10. =---------------------------------- --------------------------------
  11. = Script Written By PHPWMS project team
  12. = Last updated: xinge
  13. = Last date: 2007- 12-09
  14. ---------------------------------------------=*/
  16. class SysCrypt {
  17. private $crypt_key;
  19. //Constructor
  20. public function __construct($crypt_key) {
  21. $this -> crypt_key = $crypt_key;
  22. }
  24. public function php_encrypt($txt) {
  25. srand((double) microtime() * 1000000);
  26. $encrypt_key = md5(rand(0,32000));
  27. $ctr = 0;
  28. $tmp = '';
  29. for($i = 0;$i $ctr = $ctr == strlen($encrypt_key) ? 0 : $ctr;
  30. $tmp .= $encrypt_key[$ctr].($txt[$i]^$encrypt_key[$ctr++] );
  31. }
  32. return base64_encode(self::__key($tmp,$this -> crypt_key));
  33. }
  35. public function php_decrypt($txt) {
  36. $txt = self::__key(base64_decode($txt ),$this -> crypt_key);
  37. $tmp = '';
  38. for($i = 0;$i < strlen($txt); $i++) {
  39. $md5 = $txt[$i];
  40. $tmp .= $txt[++$i] ^ $md5;
  41. }
  42. return $tmp;
  43. }
  45. private function __key($txt,$encrypt_key) {
  46. $encrypt_key = md5($encrypt_key);
  47. $ctr = 0;
  48. $tmp = '';
  49. for($i = 0; $i < strlen($txt); $i++) {
  50. $ctr = $ctr == strlen($encrypt_key) ? 0 : $ctr;
  51. $tmp .= $txt[$i] ^ $encrypt_key[$ctr++];
  52. }
  53. return $tmp;
  54. }
  56. public function __destruct() {
  57. $this -> crypt_key = null;
  58. }
  59. }
  61. #--Call example
  62. $sc = new SysCrypt('phpwms');
  63. $text = '110';
  64. print($sc -> php_encrypt($text));
  65. print('< ;br>');
  66. print($sc -> php_decrypt($sc -> php_encrypt($text)));
  67. ?>
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参考discuz的passpor写的php加密解密处理类
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