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1 | <?php |
2 | |
d3c89357 |
3 | /** |
4 | ** mail_fetch/functions.php |
5 | ** |
6 | ** Copyright (c) 1999-2001 The Squirrelmail Development Team |
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); |
23 | for( $i=0; $i < $len; $i += 2 ) { |
24 | $newdata .= pack( "C", hexdec( substr( $data, $i, 2) ) ); |
25 | } |
26 | return $newdata; |
27 | } |
28 | |
29 | function mf_keyED( $txt ) { |
30 | |
31 | global $MF_TIT; |
32 | |
33 | if( !isset( $MF_TIT ) ) { |
34 | $MF_TIT = "MailFetch Secure for SquirrelMail 1.x"; |
35 | } |
36 | |
37 | $encrypt_key = md5( $MF_TIT ); |
38 | $ctr = 0; |
39 | $tmp = ""; |
40 | for( $i = 0; $i < strlen( $txt ); $i++ ) { |
41 | if( $ctr == strlen( $encrypt_key ) ) $ctr=0; |
42 | $tmp.= substr( $txt, $i, 1 ) ^ substr( $encrypt_key, $ctr, 1 ); |
43 | $ctr++; |
44 | } |
45 | return $tmp; |
46 | } |
47 | |
48 | function encrypt( $txt ) { |
49 | |
50 | srand( (double) microtime() * 1000000 ); |
51 | $encrypt_key = md5( rand( 0, 32000 ) ); |
52 | $ctr = 0; |
53 | $tmp = ""; |
54 | for( $i = 0; $i < strlen( $txt ); $i++ ) { |
55 | if ($ctr==strlen($encrypt_key)) $ctr=0; |
56 | $tmp.= substr($encrypt_key,$ctr,1) . |
57 | (substr($txt,$i,1) ^ substr($encrypt_key,$ctr,1)); |
58 | $ctr++; |
59 | } |
60 | return bin2hex( mf_keyED( $tmp ) ); |
61 | |
62 | } |
63 | |
64 | function decrypt( $txt ) { |
65 | |
66 | $txt = mf_keyED( hex2bin( $txt ) ); |
67 | $tmp = ''; |
68 | for ( $i=0; $i < strlen( $txt ); $i++ ) { |
69 | $md5 = substr( $txt, $i, 1 ); |
70 | $i++; |
71 | $tmp.= ( substr( $txt, $i, 1 ) ^ $md5 ); |
72 | } |
73 | return $tmp; |
74 | } |
75 | |
76 | ?> |