几种PHP对称加密解密源码

最近搞一点东西要用到对称加密,于是在网上找到一个不错的对称加密方法,分享给大家。

  1. /**
  2. * 简单对称加密算法之加密
  3. * @param String $string 需要加密的字串
  4. * @param String $skey 加密EKY
  5. * @date 2013-08-13 19:30
  6. * @update 2014-10-10 10:10
  7. * @return String
  8. */
  9. function encode($string = '', $skey = 'cxphp') {
  10. $strArr = str_split(base64_encode($string));
  11. $strCount = count($strArr);
  12. foreach (str_split($skey) as $key => $value)
  13. $key < $strCount && $strArr[$key].=$value;
  14. return str_replace(array('=', '+', '/'), array('O0O0O', 'o000o', 'oo00o'), join('', $strArr));
  15. }
  16.  
  17. /**
  18. * 简单对称加密算法之解密
  19. * @param String $string 需要解密的字串
  20. * @param String $skey 解密KEY
  21. * @author Anyon Zou <zoujingli@qq.com>
  22. * @date 2013-08-13 19:30
  23. * @update 2014-10-10 10:10
  24. * @return String
  25. */
  26. function decode($string = '', $skey = 'cxphp') {
  27. $strArr = str_split(str_replace(array('O0O0O', 'o000o', 'oo00o'), array('=', '+', '/'), $string), 2);
  28. $strCount = count($strArr);
  29. foreach (str_split($skey) as $key => $value)
  30. $key <= $strCount && isset($strArr[$key]) && $strArr[$key][1] === $value && $strArr[$key] = $strArr[$key][0];
  31. return base64_decode(join('', $strArr));
  32. }
  33.  
  34. echo '<pre>';
  35. echo "encode : " . ($enstring = encode($str)) . '<br />';
  36. echo "decode : " . decode($enstring);
  37. die();

安全URL解码

  1. /**
  2. * 安全URL编码
  3. * @param string $data
  4. * @date 2017/06/26
  5. * @return string
  6. */
  7. function encode($data) {
  8. return str_replace(array('+', '/', '='), array('-', '_', ''), base64_encode(serialize($data)));
  9. }
  10.  
  11. function decode($string) {
  12. $data = str_replace(array('-', '_'), array('+', '/'), $string);
  13. $mod4 = strlen($data) % 4;
  14. ($mod4) && $data .= substr('====', $mod4);
  15. return unserialize(base64_decode($data));
  16. }

UTF8三十六进制

  1. /**
  2. * UTF8字符串加密
  3. * @param string $string
  4. * @date 2017/06/26
  5. * @return string
  6. */
  7. function encode($string) {
  8. $chars = '';
  9. $len = strlen($string = iconv('utf-8', 'gbk', $string));
  10. for ($i = 0; $i < $len; $i++) {
  11. $chars .= str_pad(base_convert(ord($string[$i]), 10, 36), 2, 0, 0);
  12. }
  13. return strtoupper($chars);
  14. }
  15.  
  16. function decode($string) {
  17. $chars = '';
  18. foreach (str_split($string, 2) as $char) {
  19. $chars .= chr(intval(base_convert($char, 36, 10)));
  20. }
  21. return iconv('gbk', 'utf-8', $chars);
  22. }

别的方式

  1. //字符串加密
  2. function lockString($txt,$key)
  3. {
  4. $chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-=+";
  5. $nh = rand(0,64);
  6. $ch = $chars[$nh];
  7. $mdKey = md5($key.$ch);
  8. $mdKey = substr($mdKey,$nh%8, $nh%8+7);
  9. $txt = base64_encode($txt);
  10. $tmp = '';
  11. $i=0;$j=0;$k = 0;
  12. for ($i=0; $i<strlen($txt); $i++) {
  13. $k = $k == strlen($mdKey) ? 0 : $k;
  14. $j = ($nh+strpos($chars,$txt[$i])+ord($mdKey[$k++]))%64;
  15. $tmp .= $chars[$j];
  16. }
  17. return urlencode($ch.$tmp);
  18. }
  19.  
  20. function unlockString($txt,$key)
  21. {
  22. $txt = urldecode($txt);
  23. $chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-=+";
  24. $ch = $txt[0];
  25. $nh = strpos($chars,$ch);
  26. $mdKey = md5($key.$ch);
  27. $mdKey = substr($mdKey,$nh%8, $nh%8+7);
  28. $txt = substr($txt,1);
  29. $tmp = '';
  30. $i=0;$j=0; $k = 0;
  31. for ($i=0; $i<strlen($txt); $i++) {
  32. $k = $k == strlen($mdKey) ? 0 : $k;
  33. $j = strpos($chars,$txt[$i])-$nh - ord($mdKey[$k++]);
  34. while ($j<0) $j+=64;
  35. $tmp .= $chars[$j];
  36. }
  37. return base64_decode($tmp);
  38. }

auth_code优化版

  1. /**
  2. * @param string $string 加密字符串内容
  3. * @param string $operation 加密或者解密
  4. * @param string $key 私钥
  5. * @param int $expiry 过期时间/秒 0为永不过期
  6. * @return false|string
  7. */
  8. function auth_code(string $string, $operation = 'DECODE', $key = '', $expiry = 0)
  9. {
  10. $cakey_length = 4;
  11. $key = md5($key);
  12. $keys = md5(substr($key, 0, 16));
  13. $keytab = md5(substr($key, 16, 16));
  14. if ($operation === 'DECODE') {
  15. $key_str = substr($string, 0, $cakey_length);
  16. } else {
  17. $key_str = substr(md5(microtime()), -$cakey_length);
  18. }
  19. $keycode = $cakey_length ? $key_str : '';
  20. $cryptic = $keys . md5($keys . $keycode);
  21. $key_length = strlen($cryptic);
  22. $string = $operation === 'DECODE' ? base64_decode(substr($string, $cakey_length)) : sprintf('%010d', $expiry ? $expiry + time() : 0) . substr(md5($string . $keytab), 0, 16) . $string;
  23. $string_length = strlen($string);
  24. $result = '';
  25. $box = range(0, 255);
  26. $render = array();
  27. for ($i = 0; $i <= 255; $i++) {
  28. $render[$i] = ord($cryptic[$i % $key_length]);
  29. }
  30. for ($j = $i = 0; $i < 256; $i++) {
  31. $j = ($j + $box[$i] + $render[$i]) % 256;
  32. $tmp = $box[$i];
  33. $box[$i] = $box[$j];
  34. $box[$j] = $tmp;
  35. }
  36. for ($a = $j = $i = 0; $i < $string_length; $i++) {
  37. $a = ($a + 1) % 256;
  38. $j = ($j + $box[$a]) % 256;
  39. $tmp = $box[$a];
  40. $box[$a] = $box[$j];
  41. $box[$j] = $tmp;
  42. $result .= chr(ord($string[$i]) ^ ($box[($box[$a] + $box[$j]) % 256]));
  43. }
  44. if ($operation === 'DECODE') {
  45. if ((strpos($result, 0) === 0 || substr($result, 0, 10) - time() > 0) && strpos(md5(substr($result, 26) . $keytab), substr($result, 10, 16)) === 0) {
  46. return substr($result, 26);
  47. }
  48. return '';
  49. }
  50. return $keycode . str_replace('=', '', base64_encode($result));
  51. }
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