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1 | <?php |
2 | |
3 | /** |
4 | * imap_general.php |
5 | * |
76911253 |
6 | * Copyright (c) 1999-2003 The SquirrelMail Project Team |
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7 | * Licensed under the GNU GPL. For full terms see the file COPYING. |
8 | * |
9 | * This implements all functions that do general imap functions. |
10 | * |
11 | * $Id $ |
12 | */ |
13 | |
14 | function imap_utf7_encode_local($s) { |
15 | $b64_s = ''; // buffer for substring to be base64-encoded |
16 | $utf7_s = ''; // imap-utf7-encoded string |
17 | for ($i = 0; $i < strlen($s); $i++) { |
18 | $c = $s[$i]; |
19 | $ord_c = ord($c); |
20 | if ((($ord_c >= 0x20) and ($ord_c <= 0x25)) or |
21 | (($ord_c >= 0x27) and ($ord_c <= 0x7e))) { |
22 | if ($b64_s) { |
23 | $utf7_s = $utf7_s . '&' . encodeBASE64($b64_s) .'-'; |
24 | $b64_s = ''; |
25 | } |
26 | $utf7_s = $utf7_s . $c; |
27 | } elseif ($ord_c == 0x26) { |
28 | if ($b64_s) { |
29 | $utf7_s = $utf7_s . '&' . encodeBASE64($b64_s) . '-'; |
30 | $b64_s = ''; |
31 | } |
32 | $utf7_s = $utf7_s . '&-'; |
33 | } else { |
34 | $b64_s = $b64_s . chr(0) . $c; |
35 | } |
36 | } |
37 | // |
38 | // flush buffer |
39 | // |
40 | if ($b64_s) { |
41 | $utf7_s = $utf7_s . '&' . encodeBASE64($b64_s) . '-'; |
42 | $b64_s = ''; |
43 | } |
44 | return $utf7_s; |
45 | } |
46 | |
47 | function imap_utf7_decode_local($s) { |
48 | $b64_s = ''; |
49 | $iso_8859_1_s = ''; |
50 | for ($i = 0, $len = strlen($s); $i < $len; $i++) { |
51 | $c = $s[$i]; |
52 | if (strlen($b64_s) > 0) { |
53 | if ($c == '-') { |
54 | if ($b64_s == '&') { |
55 | $iso_8859_1_s = $iso_8859_1_s . '&'; |
56 | } else { |
57 | $iso_8859_1_s = $iso_8859_1_s . |
58 | decodeBASE64(substr($b64_s, 1)); |
59 | } |
60 | $b64_s = ''; |
61 | } else { |
62 | $b64_s = $b64_s . $c; |
63 | } |
64 | } else { |
65 | if ($c == '&') { |
66 | $b64_s = '&'; |
67 | } else { |
68 | $iso_8859_1_s = $iso_8859_1_s . $c; |
69 | } |
70 | } |
71 | } |
72 | return $iso_8859_1_s; |
73 | } |
74 | |
75 | function encodeBASE64($s) { |
76 | $B64Chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+,'; |
77 | $p = 0; // phase: 1 / 2 / 3 / 1 / 2 / 3... |
78 | $e = ''; // base64-encoded string |
79 | //foreach($s as $c) { |
80 | for ($i = 0; $i < strlen($s); $i++) { |
81 | $c = $s[$i]; |
82 | if ($p == 0) { |
83 | $e = $e . substr($B64Chars, ((ord($c) & 252) >> 2), 1); |
84 | $t = (ord($c) & 3); |
85 | $p = 1; |
86 | } elseif ($p == 1) { |
87 | $e = $e . $B64Chars[($t << 4) + ((ord($c) & 240) >> 4)]; |
88 | $t = (ord($c) & 15); |
89 | $p = 2; |
90 | } elseif ($p == 2) { |
91 | $e = $e . $B64Chars[($t << 2) + ((ord($c) & 192) >> 6)]; |
92 | $e = $e . $B64Chars[ord($c) & 63]; |
93 | $p = 0; |
94 | } |
95 | } |
96 | // |
97 | // flush buffer |
98 | // |
99 | if ($p == 1) { |
100 | $e = $e . $B64Chars[$t << 4]; |
101 | } elseif ($p == 2) { |
102 | $e = $e . $B64Chars[$t << 2]; |
103 | } |
104 | return $e; |
105 | } |
106 | |
107 | function decodeBASE64($s) { |
108 | $B64Values = array( |
109 | 'A' => 0, 'B' => 1, 'C' => 2, 'D' => 3, 'E' => 4, 'F' => 5, |
110 | 'G' => 6, 'H' => 7, 'I' => 8, 'J' => 9, 'K' => 10, 'L' => 11, |
111 | 'M' => 12, 'N' => 13, 'O' => 14, 'P' => 15, 'Q' => 16, 'R' => 17, |
112 | 'S' => 18, 'T' => 19, 'U' => 20, 'V' => 21, 'W' => 22, 'X' => 23, |
113 | 'Y' => 24, 'Z' => 25, |
114 | 'a' => 26, 'b' => 27, 'c' => 28, 'd' => 29, 'e' => 30, 'f' => 31, |
115 | 'g' => 32, 'h' => 33, 'i' => 34, 'j' => 35, 'k' => 36, 'l' => 37, |
116 | 'm' => 38, 'n' => 39, 'o' => 40, 'p' => 41, 'q' => 42, 'r' => 43, |
117 | 's' => 44, 't' => 45, 'u' => 46, 'v' => 47, 'w' => 48, 'x' => 49, |
118 | 'y' => 50, 'z' => 51, |
119 | '0' => 52, '1' => 53, '2' => 54, '3' => 55, '4' => 56, '5' => 57, |
120 | '6' => 58, '7' => 59, '8' => 60, '9' => 61, '+' => 62, ',' => 63 |
121 | ); |
122 | $p = 0; |
123 | $d = ''; |
124 | $unicodeNullByteToggle = 0; |
125 | for ($i = 0, $len = strlen($s); $i < $len; $i++) { |
126 | $c = $s[$i]; |
127 | if ($p == 0) { |
128 | $t = $B64Values[$c]; |
129 | $p = 1; |
130 | } elseif ($p == 1) { |
131 | if ($unicodeNullByteToggle) { |
132 | $d = $d . chr(($t << 2) + (($B64Values[$c] & 48) >> 4)); |
133 | $unicodeNullByteToggle = 0; |
134 | } else { |
135 | $unicodeNullByteToggle = 1; |
136 | } |
137 | $t = ($B64Values[$c] & 15); |
138 | $p = 2; |
139 | } elseif ($p == 2) { |
140 | if ($unicodeNullByteToggle) { |
141 | $d = $d . chr(($t << 4) + (($B64Values[$c] & 60) >> 2)); |
142 | $unicodeNullByteToggle = 0; |
143 | } else { |
144 | $unicodeNullByteToggle = 1; |
145 | } |
146 | $t = ($B64Values[$c] & 3); |
147 | $p = 3; |
148 | } elseif ($p == 3) { |
149 | if ($unicodeNullByteToggle) { |
150 | $d = $d . chr(($t << 6) + $B64Values[$c]); |
151 | $unicodeNullByteToggle = 0; |
152 | } else { |
153 | $unicodeNullByteToggle = 1; |
154 | } |
155 | $t = ($B64Values[$c] & 3); |
156 | $p = 0; |
157 | } |
158 | } |
159 | return $d; |
160 | } |
161 | |
162 | ?> |