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source: CSP Module/mindcrime/general/system/runstartup/tools.php @ 287

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Revision 287, 8.5 KB checked in by mindcrime, 7 months ago (diff)


Line
1 <?php
2
3 if (!defined('MINDCRIME_CLANSPHERE_TOOLS'))
4 define('MINDCRIME_CLANSPHERE_TOOLS', true);
5
6 /**
7 * Encode to ClanSphere encoding (UTF-8) if possible, using iconv() (or mb_detect_encoding()) when available
8 *
9 * @param string $input the string to be encoded
10 * @param string $charsetFrom the current character set of the string
11 * @param string $charsetTo optional: the character set to convert to, if not set encode to the ClanSphere encoding.
12 *
13 * @return string the (possibly) converted string
14 *
15 * @uses iconv() if possible
16 */
17 function cs_encode($input, $charsetFrom = 'ISO-8859-15', $charsetTo = null)
18 {
19 global $cs_main;
20
21 if (is_null($charsetTo))
22 {
23 $charsetTo = strtoupper($cs_main['charset']);
24 }
25
26 // no need to convert if the charsets are the same
27 if (strtoupper($charsetTo) == strtoupper($charsetFrom))
28 {
29 return $input;
30 }
31
32 if (function_exists('iconv'))
33 {
34 /* use transliteral */
35 $return = @iconv(strtoupper($charsetFrom), strtoupper($charsetTo).'//TRANSLIT', $input);
36 if ($return !== false)
37 return $return;
38 }
39 else
40 {
41 /* Uses utf8_encode/utf8_decode and mb_detect_encoding/mb_convert_encoding.
42 * To be extended in the future...
43 */
44 if (strtoupper($charsetTo) == 'UTF-8')
45 {
46 switch (strtoupper($charsetFrom))
47 {
48 case 'ISO-8859-1':
49 // case 'ISO-8859-15':
50 return utf8_encode($input);
51 break;
52 default:
53 if (function_exists('mb_detect_encoding'))
54 {
55 $encoding = mb_detect_encoding($input);
56 if (is_string($encoding))
57 return mb_convert_encoding($input, 'UTF-8', $encoding);
58 // else, do nothing
59 }
60 break;
61 }
62 }
63 if (strtoupper($charsetFrom) == 'UTF-8')
64 {
65 switch (strtoupper($charsetTo))
66 {
67 case 'ISO-8859-1':
68 // case 'ISO-8859-15':
69 return utf8_decode($input);
70 break;
71 default:
72 break;
73 }
74 }
75 }
76 // if we don't know what to do, just return it
77 return $input;
78 } // function cs_encode
79
80 /*
81 * Description : A function with a very simple but powerful xor method to encrypt
82 * and/or decrypt a string with an unknown key. Implicitly the key is
83 * defined by the string itself in a character by character way.
84 * There are 4 items to compose the unknown key for the character
85 * in the algorithm
86 * 1.- The ascii code of every character of the string itself
87 * 2.- The position in the string of the character to encrypt
88 * 3.- The length of the string that include the character
89 * 4.- Any special formula added by the programmer to the algorithm
90 * to calculate the key to use
91 */
92 function cs_encrypt_decrypt($string)
93 {
94 //Function : encrypt/decrypt a string message v.1.0 without a known key
95 //Author : Aitor Solozabal Merino (spain)
96 //Email : aitor-3@euskalnet.net
97 //Date : 01-04-2005
98 $strlen = strlen($string);
99 $strencrypted = '';
100 for ($pos = 0; $pos < $strlen ; $pos++)
101 {
102 // long code of the function to explain the algoritm
103 // this function can be tailored by the programmer modifyng the formula
104 // to calculate the key to use for every character in the string.
105 $usekey = (($strlen+$pos)+1); // (+5 or *3 or ^2)
106 // after that we need a module division because can´t be greater than 255
107 $usekey = (255+$usekey) % 255;
108 $encryptbyte = substr($string, $pos, 1);
109 $asciibyte = ord($encryptbyte);
110 $xorbyte = $asciibyte ^ $usekey; // xor operation
111 $encrypted = chr($xorbyte);
112 $strencrypted .= $encrypted;
113
114 //short code of the function once explained
115 // $str_encrypted_message .= chr((ord(substr($str_message, $position, 1))) ^ ((255+(($len_str_message+$position)+1)) % 255));
116 }
117 return $strencrypted;
118 } // function cs_encrypt_decrypt
119
120 /**

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