Tylerization
[squirrelmail.git] / plugins / mail_fetch / functions.php
CommitLineData
d622d38a 1<?php
2
d3c89357 3 /**
4 ** mail_fetch/functions.php
5 **
15e6162e 6 ** Copyright (c) 1999-2002 The SquirrelMail Project Team
d3c89357 7 ** Licensed under the GNU GPL. For full terms see the file COPYING.
8 **
9 ** Functions for the mailfetch plugin.
10 **
11 ** Original code from LexZEUS <lexzeus@mifinca.com>
12 ** and josh@superfork.com (extracted from php manual)
13 ** Adapted for MailFetch by Philippe Mingo <mingo@rotedic.com>
14 **
15 ** $Id$
16 **/
d622d38a 17
18 function hex2bin( $data ) {
19
20 /* Original code by josh@superfork.com */
21
22 $len = strlen($data);
9af8c23a 23 $newdata = '';
d622d38a 24 for( $i=0; $i < $len; $i += 2 ) {
25 $newdata .= pack( "C", hexdec( substr( $data, $i, 2) ) );
26 }
27 return $newdata;
28 }
29
30 function mf_keyED( $txt ) {
31
32 global $MF_TIT;
33
34 if( !isset( $MF_TIT ) ) {
35 $MF_TIT = "MailFetch Secure for SquirrelMail 1.x";
36 }
37
38 $encrypt_key = md5( $MF_TIT );
39 $ctr = 0;
40 $tmp = "";
41 for( $i = 0; $i < strlen( $txt ); $i++ ) {
42 if( $ctr == strlen( $encrypt_key ) ) $ctr=0;
43 $tmp.= substr( $txt, $i, 1 ) ^ substr( $encrypt_key, $ctr, 1 );
44 $ctr++;
45 }
46 return $tmp;
47 }
48
49 function encrypt( $txt ) {
50
51 srand( (double) microtime() * 1000000 );
52 $encrypt_key = md5( rand( 0, 32000 ) );
53 $ctr = 0;
54 $tmp = "";
55 for( $i = 0; $i < strlen( $txt ); $i++ ) {
56 if ($ctr==strlen($encrypt_key)) $ctr=0;
57 $tmp.= substr($encrypt_key,$ctr,1) .
58 (substr($txt,$i,1) ^ substr($encrypt_key,$ctr,1));
59 $ctr++;
60 }
61 return bin2hex( mf_keyED( $tmp ) );
62
63 }
64
65 function decrypt( $txt ) {
66
67 $txt = mf_keyED( hex2bin( $txt ) );
68 $tmp = '';
69 for ( $i=0; $i < strlen( $txt ); $i++ ) {
70 $md5 = substr( $txt, $i, 1 );
71 $i++;
72 $tmp.= ( substr( $txt, $i, 1 ) ^ $md5 );
73 }
74 return $tmp;
75 }
76
15e6162e 77?>