4 ** mail_fetch/functions.php
6 ** Copyright (c) 1999-2002 The SquirrelMail Project Team
7 ** Licensed under the GNU GPL. For full terms see the file COPYING.
9 ** Functions for the mailfetch plugin.
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>
18 function hex2bin( $data ) {
20 /* Original code by josh@superfork.com */
24 for( $i=0; $i < $len; $i +
= 2 ) {
25 $newdata .= pack( "C", hexdec( substr( $data, $i, 2) ) );
30 function mf_keyED( $txt ) {
34 if( !isset( $MF_TIT ) ) {
35 $MF_TIT = "MailFetch Secure for SquirrelMail 1.x";
38 $encrypt_key = md5( $MF_TIT );
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 );
49 function encrypt( $txt ) {
51 srand( (double) microtime() * 1000000 );
52 $encrypt_key = md5( rand( 0, 32000 ) );
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));
61 return bin2hex( mf_keyED( $tmp ) );
65 function decrypt( $txt ) {
67 $txt = mf_keyED( hex2bin( $txt ) );
69 for ( $i=0; $i < strlen( $txt ); $i++
) {
70 $md5 = substr( $txt, $i, 1 );
72 $tmp.= ( substr( $txt, $i, 1 ) ^
$md5 );