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1 | <?php |
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2 | |
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3 | /** |
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4 | * strings.php |
5 | * |
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6 | * Copyright (c) 1999-2002 The SquirrelMail Project Team |
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7 | * Licensed under the GNU GPL. For full terms see the file COPYING. |
8 | * |
9 | * This code provides various string manipulation functions that are |
10 | * used by the rest of the Squirrelmail code. |
11 | * |
12 | * $Id$ |
13 | */ |
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14 | |
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15 | /** |
16 | * SquirrelMail version number -- DO NOT CHANGE |
17 | */ |
18 | global $version; |
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19 | $version = '1.2.6 [cvs]'; |
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20 | |
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21 | /** |
22 | * Wraps text at $wrap characters |
23 | * |
24 | * Has a problem with special HTML characters, so call this before |
25 | * you do character translation. |
26 | * |
27 | * Specifically, ' comes up as 5 characters instead of 1. |
28 | * This should not add newlines to the end of lines. |
29 | */ |
30 | function sqWordWrap(&$line, $wrap) { |
31 | ereg("^([\t >]*)([^\t >].*)?$", $line, $regs); |
32 | $beginning_spaces = $regs[1]; |
33 | if (isset($regs[2])) { |
34 | $words = explode(' ', $regs[2]); |
35 | } else { |
36 | $words = ''; |
37 | } |
38 | |
39 | $i = 0; |
40 | $line = $beginning_spaces; |
41 | |
42 | while ($i < count($words)) { |
43 | /* Force one word to be on a line (minimum) */ |
44 | $line .= $words[$i]; |
45 | $line_len = strlen($beginning_spaces) + strlen($words[$i]) + 2; |
46 | if (isset($words[$i + 1])) |
47 | $line_len += strlen($words[$i + 1]); |
48 | $i ++; |
49 | |
50 | /* Add more words (as long as they fit) */ |
51 | while ($line_len < $wrap && $i < count($words)) { |
52 | $line .= ' ' . $words[$i]; |
53 | $i++; |
54 | if (isset($words[$i])) |
55 | $line_len += strlen($words[$i]) + 1; |
56 | else |
57 | $line_len += 1; |
58 | } |
59 | |
60 | /* Skip spaces if they are the first thing on a continued line */ |
61 | while (!isset($words[$i]) && $i < count($words)) { |
62 | $i ++; |
63 | } |
64 | |
65 | /* Go to the next line if we have more to process */ |
66 | if ($i < count($words)) { |
67 | $line .= "\n" . $beginning_spaces; |
68 | } |
69 | } |
70 | } |
71 | |
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72 | /** |
73 | * If $haystack is a full mailbox name and $needle is the mailbox |
74 | * separator character, returns the last part of the mailbox name. |
75 | */ |
76 | function readShortMailboxName($haystack, $needle) { |
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77 | |
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78 | if ($needle == '') { |
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79 | $elem = $haystack; |
80 | } else { |
81 | $parts = explode($needle, $haystack); |
82 | $elem = array_pop($parts); |
83 | while ($elem == '' && count($parts)) { |
84 | $elem = array_pop($parts); |
85 | } |
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86 | } |
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87 | return( $elem ); |
66239b65 |
88 | } |
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89 | |
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90 | /** |
91 | * Returns an array of email addresses. |
92 | * Be cautious of "user@host.com" |
93 | */ |
94 | function parseAddrs($text) { |
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95 | if (trim($text) == '') |
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96 | return array(); |
97 | $text = str_replace(' ', '', $text); |
98 | $text = ereg_replace('"[^"]*"', '', $text); |
99 | $text = ereg_replace('\\([^\\)]*\\)', '', $text); |
100 | $text = str_replace(',', ';', $text); |
101 | $array = explode(';', $text); |
102 | for ($i = 0; $i < count ($array); $i++) { |
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103 | $array[$i] = eregi_replace ('^.*[<]', '', $array[$i]); |
104 | $array[$i] = eregi_replace ('[>].*$', '', $array[$i]); |
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105 | } |
106 | return $array; |
107 | } |
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108 | |
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109 | /** |
110 | * Returns a line of comma separated email addresses from an array. |
111 | */ |
112 | function getLineOfAddrs($array) { |
113 | if (is_array($array)) { |
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114 | $to_line = implode(', ', $array); |
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115 | $to_line = ereg_replace(', (, )+', ', ', $to_line); |
116 | $to_line = trim(ereg_replace('^, ', '', $to_line)); |
117 | if( substr( $to_line, -1 ) == ',' ) |
118 | $to_line = substr( $to_line, 0, -1 ); |
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119 | } else { |
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120 | $to_line = ''; |
66239b65 |
121 | } |
122 | |
123 | return( $to_line ); |
124 | } |
125 | |
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126 | function php_self () { |
127 | global $PHP_SELF, $HTTP_SERVER_VARS; |
128 | |
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129 | if (isset($HTTP_SERVER_VARS['REQUEST_URI']) && !empty($HTTP_SERVER_VARS['REQUEST_URI']) ) { |
130 | return $HTTP_SERVER_VARS['REQUEST_URI']; |
131 | } |
132 | |
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133 | if (isset($PHP_SELF) && !empty($PHP_SELF)) { |
134 | return $PHP_SELF; |
135 | } else if (isset($HTTP_SERVER_VARS['PHP_SELF']) && |
136 | !empty($HTTP_SERVER_VARS['PHP_SELF'])) { |
137 | return $HTTP_SERVER_VARS['PHP_SELF']; |
138 | } else { |
139 | return ''; |
140 | } |
141 | } |
142 | |
143 | |
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144 | /** |
145 | * This determines the location to forward to relative to your server. |
146 | * If this doesnt work correctly for you (although it should), you can |
147 | * remove all this code except the last two lines, and change the header() |
148 | * function to look something like this, customized to the location of |
149 | * SquirrelMail on your server: |
150 | * |
151 | * http://www.myhost.com/squirrelmail/src/login.php |
152 | */ |
153 | function get_location () { |
154 | |
155 | global $PHP_SELF, $SERVER_NAME, $HTTP_HOST, $SERVER_PORT, |
156 | $HTTP_SERVER_VARS; |
157 | |
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158 | /* Get the path, handle virtual directories */ |
159 | $path = substr(php_self(), 0, strrpos(php_self(), '/')); |
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160 | |
161 | /* Check if this is a HTTPS or regular HTTP request. */ |
162 | $proto = 'http://'; |
163 | |
164 | /* |
165 | * If you have 'SSLOptions +StdEnvVars' in your apache config |
166 | * OR if you have HTTPS in your HTTP_SERVER_VARS |
167 | * OR if you are on port 443 |
168 | */ |
169 | $getEnvVar = getenv('HTTPS'); |
170 | if ((isset($getEnvVar) && !strcasecmp($getEnvVar, 'on')) || |
171 | (isset($HTTP_SERVER_VARS['HTTPS'])) || |
172 | (isset($HTTP_SERVER_VARS['SERVER_PORT']) && |
173 | $HTTP_SERVER_VARS['SERVER_PORT'] == 443)) { |
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174 | $proto = 'https://'; |
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175 | } |
176 | |
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177 | /* Get the hostname from the Host header or server config. */ |
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178 | $host = ''; |
179 | if (isset($HTTP_HOST) && !empty($HTTP_HOST)) { |
180 | $host = $HTTP_HOST; |
181 | } else if (isset($SERVER_NAME) && !empty($SERVER_NAME)) { |
182 | $host = $SERVER_NAME; |
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183 | } else if (isset($HTTP_SERVER_VARS['SERVER_NAME']) && |
184 | !empty($HTTP_SERVER_VARS['SERVER_NAME'])) { |
185 | $host = $HTTP_SERVER_VARS['SERVER_NAME']; |
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186 | } |
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187 | |
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188 | |
189 | $port = ''; |
190 | if (! strstr($host, ':')) { |
191 | if (isset($SERVER_PORT)) { |
192 | if (($SERVER_PORT != 80 && $proto == 'http://') |
193 | || ($SERVER_PORT != 443 && $proto == 'https://')) { |
194 | $port = sprintf(':%d', $SERVER_PORT); |
195 | } |
196 | } |
197 | } |
198 | |
199 | /* Fallback is to omit the server name and use a relative */ |
200 | /* URI, although this is not RFC 2616 compliant. */ |
201 | return ($host ? $proto . $host . $port . $path : $path); |
202 | } |
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203 | |
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204 | |
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205 | /** |
206 | * These functions are used to encrypt the passowrd before it is |
207 | * stored in a cookie. |
208 | */ |
209 | function OneTimePadEncrypt ($string, $epad) { |
210 | $pad = base64_decode($epad); |
211 | $encrypted = ''; |
212 | for ($i = 0; $i < strlen ($string); $i++) { |
213 | $encrypted .= chr (ord($string[$i]) ^ ord($pad[$i])); |
214 | } |
215 | |
216 | return base64_encode($encrypted); |
217 | } |
218 | |
219 | function OneTimePadDecrypt ($string, $epad) { |
220 | $pad = base64_decode($epad); |
221 | $encrypted = base64_decode ($string); |
222 | $decrypted = ''; |
223 | for ($i = 0; $i < strlen ($encrypted); $i++) { |
224 | $decrypted .= chr (ord($encrypted[$i]) ^ ord($pad[$i])); |
225 | } |
226 | |
227 | return $decrypted; |
228 | } |
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229 | |
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230 | |
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231 | /** |
232 | * Randomize the mt_rand() function. Toss this in strings or integers |
233 | * and it will seed the generator appropriately. With strings, it is |
234 | * better to get them long. Use md5() to lengthen smaller strings. |
235 | */ |
236 | function sq_mt_seed($Val) { |
4deb32f1 |
237 | /* if mt_getrandmax() does not return a 2^n - 1 number, |
238 | this might not work well. This uses $Max as a bitmask. */ |
66239b65 |
239 | $Max = mt_getrandmax(); |
240 | |
241 | if (! is_int($Val)) { |
242 | if (function_exists('crc32')) { |
243 | $Val = crc32($Val); |
244 | } else { |
245 | $Str = $Val; |
246 | $Pos = 0; |
247 | $Val = 0; |
248 | $Mask = $Max / 2; |
249 | $HighBit = $Max ^ $Mask; |
250 | while ($Pos < strlen($Str)) { |
251 | if ($Val & $HighBit) { |
252 | $Val = (($Val & $Mask) << 1) + 1; |
253 | } else { |
254 | $Val = ($Val & $Mask) << 1; |
255 | } |
256 | $Val ^= $Str[$Pos]; |
257 | $Pos ++; |
258 | } |
259 | } |
260 | } |
261 | |
262 | if ($Val < 0) { |
263 | $Val *= -1; |
264 | } |
265 | |
266 | if ($Val = 0) { |
267 | return; |
268 | } |
269 | |
270 | mt_srand(($Val ^ mt_rand(0, $Max)) & $Max); |
271 | } |
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272 | |
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273 | |
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274 | /** |
275 | * This function initializes the random number generator fairly well. |
276 | * It also only initializes it once, so you don't accidentally get |
277 | * the same 'random' numbers twice in one session. |
278 | */ |
279 | function sq_mt_randomize() { |
280 | global $REMOTE_PORT, $REMOTE_ADDR, $UNIQUE_ID; |
281 | static $randomized; |
282 | |
283 | if ($randomized) { |
284 | return; |
285 | } |
286 | |
287 | /* Global. */ |
288 | sq_mt_seed((int)((double) microtime() * 1000000)); |
289 | sq_mt_seed(md5($REMOTE_PORT . $REMOTE_ADDR . getmypid())); |
290 | |
291 | /* getrusage */ |
292 | if (function_exists('getrusage')) { |
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293 | /* Avoid warnings with Win32 */ |
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294 | $dat = @getrusage(); |
295 | if (isset($dat) && is_array($dat)) { |
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296 | $Str = ''; |
297 | foreach ($dat as $k => $v) |
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298 | { |
299 | $Str .= $k . $v; |
300 | } |
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301 | sq_mt_seed(md5($Str)); |
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302 | } |
303 | } |
304 | |
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305 | /* Apache-specific */ |
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306 | sq_mt_seed(md5($UNIQUE_ID)); |
307 | |
308 | $randomized = 1; |
309 | } |
310 | |
311 | function OneTimePadCreate ($length=100) { |
312 | sq_mt_randomize(); |
313 | |
314 | $pad = ''; |
315 | for ($i = 0; $i < $length; $i++) { |
316 | $pad .= chr(mt_rand(0,255)); |
317 | } |
318 | |
319 | return base64_encode($pad); |
320 | } |
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321 | |
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322 | /** |
323 | * Check if we have a required PHP-version. Return TRUE if we do, |
324 | * or FALSE if we don't. |
325 | * |
326 | * To check for 4.0.1, use sqCheckPHPVersion(4,0,1) |
327 | * To check for 4.0b3, use sqCheckPHPVersion(4,0,-3) |
328 | * |
329 | * Does not handle betas like 4.0.1b1 or development versions |
330 | */ |
331 | function sqCheckPHPVersion($major, $minor, $release) { |
332 | |
333 | $ver = phpversion(); |
334 | eregi('^([0-9]+)\\.([0-9]+)(.*)', $ver, $regs); |
335 | |
336 | /* Parse the version string. */ |
337 | $vmajor = strval($regs[1]); |
338 | $vminor = strval($regs[2]); |
339 | $vrel = $regs[3]; |
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340 | if($vrel[0] == '.') { |
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341 | $vrel = strval(substr($vrel, 1)); |
342 | } |
343 | if($vrel[0] == 'b' || $vrel[0] == 'B') { |
344 | $vrel = - strval(substr($vrel, 1)); |
345 | } |
346 | if($vrel[0] == 'r' || $vrel[0] == 'R') { |
347 | $vrel = - strval(substr($vrel, 2))/10; |
348 | } |
349 | |
350 | /* Compare major version. */ |
351 | if ($vmajor < $major) { return false; } |
352 | if ($vmajor > $major) { return true; } |
353 | |
354 | /* Major is the same. Compare minor. */ |
355 | if ($vminor < $minor) { return false; } |
356 | if ($vminor > $minor) { return true; } |
357 | |
358 | /* Major and minor is the same as the required one. Compare release */ |
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359 | if ($vrel >= 0 && $release >= 0) { /* Neither are beta */ |
66239b65 |
360 | if($vrel < $release) return false; |
4deb32f1 |
361 | } else if($vrel >= 0 && $release < 0) { /* This is not beta, required is beta */ |
66239b65 |
362 | return true; |
4deb32f1 |
363 | } else if($vrel < 0 && $release >= 0){ /* This is beta, require not beta */ |
66239b65 |
364 | return false; |
4deb32f1 |
365 | } else { /* Both are beta */ |
66239b65 |
366 | if($vrel > $release) return false; |
367 | } |
368 | |
369 | return true; |
370 | } |
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371 | |
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372 | /** |
373 | * Returns a string showing the size of the message/attachment. |
374 | */ |
375 | function show_readable_size($bytes) { |
376 | $bytes /= 1024; |
377 | $type = 'k'; |
378 | |
379 | if ($bytes / 1024 > 1) { |
380 | $bytes /= 1024; |
381 | $type = 'm'; |
382 | } |
383 | |
384 | if ($bytes < 10) { |
385 | $bytes *= 10; |
386 | settype($bytes, 'integer'); |
387 | $bytes /= 10; |
388 | } else { |
389 | settype($bytes, 'integer'); |
390 | } |
391 | |
392 | return $bytes . '<small> ' . $type . '</small>'; |
393 | } |
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394 | |
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395 | /** |
396 | * Generates a random string from the caracter set you pass in |
397 | * |
398 | * Flags: |
399 | * 1 = add lowercase a-z to $chars |
400 | * 2 = add uppercase A-Z to $chars |
401 | * 4 = add numbers 0-9 to $chars |
402 | */ |
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403 | |
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404 | function GenerateRandomString($size, $chars, $flags = 0) { |
405 | if ($flags & 0x1) { |
406 | $chars .= 'abcdefghijklmnopqrstuvwxyz'; |
407 | } |
408 | if ($flags & 0x2) { |
409 | $chars .= 'ABCDEFGHIJKLMNOPQRSTUVWXYZ'; |
410 | } |
411 | if ($flags & 0x4) { |
412 | $chars .= '0123456789'; |
413 | } |
414 | |
415 | if (($size < 1) || (strlen($chars) < 1)) { |
416 | return ''; |
417 | } |
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418 | |
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419 | sq_mt_randomize(); /* Initialize the random number generator */ |
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420 | |
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421 | $String = ''; |
ff4f08ff |
422 | $j = strlen( $chars ) - 1; |
66239b65 |
423 | while (strlen($String) < $size) { |
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424 | $String .= $chars{mt_rand(0, $j)}; |
66239b65 |
425 | } |
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426 | |
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427 | return $String; |
428 | } |
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429 | |
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430 | function quoteIMAP($str) { |
431 | return ereg_replace('(["\\])', '\\\\1', $str); |
432 | } |
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433 | |
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434 | /** |
435 | * Trims every element in the array |
436 | */ |
437 | function TrimArray(&$array) { |
438 | foreach ($array as $k => $v) { |
439 | global $$k; |
440 | if (is_array($$k)) { |
441 | foreach ($$k as $k2 => $v2) { |
442 | $$k[$k2] = substr($v2, 1); |
23d6bd09 |
443 | } |
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444 | } else { |
445 | $$k = substr($v, 1); |
23d6bd09 |
446 | } |
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447 | |
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448 | /* Re-assign back to array. */ |
66239b65 |
449 | $array[$k] = $$k; |
450 | } |
451 | } |
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452 | |
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453 | /** |
454 | * Removes slashes from every element in the array |
455 | */ |
456 | function RemoveSlashes(&$array) { |
457 | foreach ($array as $k => $v) { |
458 | global $$k; |
459 | if (is_array($$k)) { |
460 | foreach ($$k as $k2 => $v2) { |
461 | $newArray[stripslashes($k2)] = stripslashes($v2); |
462 | } |
463 | $$k = $newArray; |
464 | } else { |
465 | $$k = stripslashes($v); |
23d6bd09 |
466 | } |
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467 | |
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468 | /* Re-assign back to the array. */ |
66239b65 |
469 | $array[$k] = $$k; |
23d6bd09 |
470 | } |
66239b65 |
471 | } |
23d6bd09 |
472 | |
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473 | $PHP_SELF = php_self(); |
474 | |
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475 | ?> |