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1 | <?php |
2 | |
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3 | /** |
4 | * mail_fetch/functions.php |
5 | * |
6 | * Copyright (c) 1999-2005 The SquirrelMail Project 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 | * @version $Id$ |
16 | * @package plugins |
17 | * @subpackage mail_fetch |
18 | */ |
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19 | |
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20 | /** |
21 | * hex2bin - document me |
22 | */ |
23 | function hex2bin( $data ) { |
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24 | |
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25 | /* Original code by josh@superfork.com */ |
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26 | |
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27 | $len = strlen($data); |
28 | $newdata = ''; |
29 | for( $i=0; $i < $len; $i += 2 ) { |
30 | $newdata .= pack( "C", hexdec( substr( $data, $i, 2) ) ); |
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31 | } |
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32 | return $newdata; |
33 | } |
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34 | |
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35 | function mf_keyED( $txt ) { |
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36 | |
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37 | global $MF_TIT; |
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38 | |
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39 | if( !isset( $MF_TIT ) ) { |
40 | $MF_TIT = "MailFetch Secure for SquirrelMail 1.x"; |
41 | } |
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42 | |
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43 | $encrypt_key = md5( $MF_TIT ); |
44 | $ctr = 0; |
45 | $tmp = ""; |
46 | for( $i = 0; $i < strlen( $txt ); $i++ ) { |
47 | if( $ctr == strlen( $encrypt_key ) ) $ctr=0; |
48 | $tmp.= substr( $txt, $i, 1 ) ^ substr( $encrypt_key, $ctr, 1 ); |
49 | $ctr++; |
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50 | } |
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51 | return $tmp; |
52 | } |
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53 | |
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54 | function encrypt( $txt ) { |
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55 | |
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56 | srand( (double) microtime() * 1000000 ); |
57 | $encrypt_key = md5( rand( 0, 32000 ) ); |
58 | $ctr = 0; |
59 | $tmp = ""; |
60 | for( $i = 0; $i < strlen( $txt ); $i++ ) { |
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61 | if ($ctr==strlen($encrypt_key)) $ctr=0; |
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62 | $tmp.= substr($encrypt_key,$ctr,1) . |
63 | (substr($txt,$i,1) ^ substr($encrypt_key,$ctr,1)); |
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64 | $ctr++; |
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65 | } |
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66 | return bin2hex( mf_keyED( $tmp ) ); |
67 | |
68 | } |
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69 | |
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70 | function decrypt( $txt ) { |
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71 | |
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72 | $txt = mf_keyED( hex2bin( $txt ) ); |
73 | $tmp = ''; |
74 | for ( $i=0; $i < strlen( $txt ); $i++ ) { |
75 | $md5 = substr( $txt, $i, 1 ); |
76 | $i++; |
77 | $tmp.= ( substr( $txt, $i, 1 ) ^ $md5 ); |
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78 | } |
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79 | return $tmp; |
80 | } |
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81 | |
91e0dccc |
82 | ?> |