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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 | |
35586184 |
15 | /** |
16 | * SquirrelMail version number -- DO NOT CHANGE |
17 | */ |
18 | global $version; |
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19 | $version = '1.3.2 [CVS-DEVEL]'; |
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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)) { |
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67 | $line .= "\n"; |
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68 | } |
69 | } |
70 | } |
71 | |
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72 | /** |
73 | * Does the opposite of sqWordWrap() |
74 | */ |
75 | function sqUnWordWrap(&$body) { |
76 | $lines = explode("\n", $body); |
77 | $body = ''; |
78 | $PreviousSpaces = ''; |
79 | $cnt = count($lines); |
80 | for ($i = 0; $i < $cnt; $i ++) { |
81 | preg_match("/^([\t >]*)([^\t >].*)?$/", $lines[$i], $regs); |
82 | $CurrentSpaces = $regs[1]; |
83 | if (isset($regs[2])) { |
84 | $CurrentRest = $regs[2]; |
85 | } |
86 | |
87 | if ($i == 0) { |
88 | $PreviousSpaces = $CurrentSpaces; |
89 | $body = $lines[$i]; |
90 | } else if (($PreviousSpaces == $CurrentSpaces) /* Do the beginnings match */ |
91 | && (strlen($lines[$i - 1]) > 65) /* Over 65 characters long */ |
92 | && strlen($CurrentRest)) { /* and there's a line to continue with */ |
93 | $body .= ' ' . $CurrentRest; |
94 | } else { |
95 | $body .= "\n" . $lines[$i]; |
96 | $PreviousSpaces = $CurrentSpaces; |
97 | } |
98 | } |
99 | $body .= "\n"; |
100 | } |
101 | |
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102 | /** |
103 | * If $haystack is a full mailbox name and $needle is the mailbox |
104 | * separator character, returns the last part of the mailbox name. |
105 | */ |
106 | function readShortMailboxName($haystack, $needle) { |
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107 | |
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108 | if ($needle == '') { |
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109 | $elem = $haystack; |
110 | } else { |
111 | $parts = explode($needle, $haystack); |
112 | $elem = array_pop($parts); |
113 | while ($elem == '' && count($parts)) { |
114 | $elem = array_pop($parts); |
115 | } |
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116 | } |
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117 | return( $elem ); |
66239b65 |
118 | } |
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119 | |
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120 | /** |
121 | * Returns an array of email addresses. |
122 | * Be cautious of "user@host.com" |
123 | */ |
124 | function parseAddrs($text) { |
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125 | if (trim($text) == '') |
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126 | return array(); |
127 | $text = str_replace(' ', '', $text); |
128 | $text = ereg_replace('"[^"]*"', '', $text); |
129 | $text = ereg_replace('\\([^\\)]*\\)', '', $text); |
130 | $text = str_replace(',', ';', $text); |
131 | $array = explode(';', $text); |
132 | for ($i = 0; $i < count ($array); $i++) { |
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133 | $array[$i] = eregi_replace ('^.*[<]', '', $array[$i]); |
134 | $array[$i] = eregi_replace ('[>].*$', '', $array[$i]); |
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135 | } |
136 | return $array; |
137 | } |
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138 | |
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139 | /** |
140 | * Returns a line of comma separated email addresses from an array. |
141 | */ |
142 | function getLineOfAddrs($array) { |
143 | if (is_array($array)) { |
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144 | $to_line = implode(', ', $array); |
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145 | $to_line = ereg_replace(', (, )+', ', ', $to_line); |
146 | $to_line = trim(ereg_replace('^, ', '', $to_line)); |
147 | if( substr( $to_line, -1 ) == ',' ) |
148 | $to_line = substr( $to_line, 0, -1 ); |
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149 | } else { |
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150 | $to_line = ''; |
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151 | } |
152 | |
153 | return( $to_line ); |
154 | } |
155 | |
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156 | function php_self () { |
157 | global $PHP_SELF, $HTTP_SERVER_VARS; |
158 | |
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159 | if (isset($HTTP_SERVER_VARS['REQUEST_URI']) && !empty($HTTP_SERVER_VARS['REQUEST_URI']) ) { |
160 | return $HTTP_SERVER_VARS['REQUEST_URI']; |
161 | } |
162 | |
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163 | if (isset($PHP_SELF) && !empty($PHP_SELF)) { |
164 | return $PHP_SELF; |
165 | } else if (isset($HTTP_SERVER_VARS['PHP_SELF']) && |
166 | !empty($HTTP_SERVER_VARS['PHP_SELF'])) { |
167 | return $HTTP_SERVER_VARS['PHP_SELF']; |
168 | } else { |
169 | return ''; |
170 | } |
171 | } |
172 | |
173 | |
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174 | /** |
175 | * This determines the location to forward to relative to your server. |
176 | * If this doesnt work correctly for you (although it should), you can |
177 | * remove all this code except the last two lines, and change the header() |
178 | * function to look something like this, customized to the location of |
179 | * SquirrelMail on your server: |
180 | * |
181 | * http://www.myhost.com/squirrelmail/src/login.php |
182 | */ |
183 | function get_location () { |
184 | |
185 | global $PHP_SELF, $SERVER_NAME, $HTTP_HOST, $SERVER_PORT, |
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186 | $HTTP_SERVER_VARS, $imap_server_type; |
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187 | |
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188 | /* Get the path, handle virtual directories */ |
189 | $path = substr(php_self(), 0, strrpos(php_self(), '/')); |
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190 | |
191 | /* Check if this is a HTTPS or regular HTTP request. */ |
192 | $proto = 'http://'; |
193 | |
194 | /* |
195 | * If you have 'SSLOptions +StdEnvVars' in your apache config |
196 | * OR if you have HTTPS in your HTTP_SERVER_VARS |
197 | * OR if you are on port 443 |
198 | */ |
199 | $getEnvVar = getenv('HTTPS'); |
200 | if ((isset($getEnvVar) && !strcasecmp($getEnvVar, 'on')) || |
201 | (isset($HTTP_SERVER_VARS['HTTPS'])) || |
202 | (isset($HTTP_SERVER_VARS['SERVER_PORT']) && |
203 | $HTTP_SERVER_VARS['SERVER_PORT'] == 443)) { |
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204 | $proto = 'https://'; |
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205 | } |
206 | |
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207 | /* Get the hostname from the Host header or server config. */ |
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208 | $host = ''; |
209 | if (isset($HTTP_HOST) && !empty($HTTP_HOST)) { |
210 | $host = $HTTP_HOST; |
211 | } else if (isset($SERVER_NAME) && !empty($SERVER_NAME)) { |
212 | $host = $SERVER_NAME; |
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213 | } else if (isset($HTTP_SERVER_VARS['SERVER_NAME']) && |
214 | !empty($HTTP_SERVER_VARS['SERVER_NAME'])) { |
215 | $host = $HTTP_SERVER_VARS['SERVER_NAME']; |
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216 | } |
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217 | |
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218 | |
219 | $port = ''; |
220 | if (! strstr($host, ':')) { |
221 | if (isset($SERVER_PORT)) { |
222 | if (($SERVER_PORT != 80 && $proto == 'http://') |
223 | || ($SERVER_PORT != 443 && $proto == 'https://')) { |
224 | $port = sprintf(':%d', $SERVER_PORT); |
225 | } |
226 | } |
227 | } |
228 | |
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229 | /* this is a workaround for the weird macosx caching that |
230 | causes Apache to return 16080 as the port number, which causes |
231 | SM to bail */ |
232 | |
233 | if ($imap_server_type == 'macosx' && $port == ':16080') { |
234 | $port = ''; |
235 | } |
236 | |
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237 | /* Fallback is to omit the server name and use a relative */ |
238 | /* URI, although this is not RFC 2616 compliant. */ |
239 | return ($host ? $proto . $host . $port . $path : $path); |
240 | } |
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241 | |
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242 | |
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243 | /** |
244 | * These functions are used to encrypt the passowrd before it is |
245 | * stored in a cookie. |
246 | */ |
247 | function OneTimePadEncrypt ($string, $epad) { |
248 | $pad = base64_decode($epad); |
249 | $encrypted = ''; |
250 | for ($i = 0; $i < strlen ($string); $i++) { |
251 | $encrypted .= chr (ord($string[$i]) ^ ord($pad[$i])); |
252 | } |
253 | |
254 | return base64_encode($encrypted); |
255 | } |
256 | |
257 | function OneTimePadDecrypt ($string, $epad) { |
258 | $pad = base64_decode($epad); |
259 | $encrypted = base64_decode ($string); |
260 | $decrypted = ''; |
261 | for ($i = 0; $i < strlen ($encrypted); $i++) { |
262 | $decrypted .= chr (ord($encrypted[$i]) ^ ord($pad[$i])); |
263 | } |
264 | |
265 | return $decrypted; |
266 | } |
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267 | |
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268 | |
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269 | /** |
270 | * Randomize the mt_rand() function. Toss this in strings or integers |
271 | * and it will seed the generator appropriately. With strings, it is |
272 | * better to get them long. Use md5() to lengthen smaller strings. |
273 | */ |
274 | function sq_mt_seed($Val) { |
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275 | /* if mt_getrandmax() does not return a 2^n - 1 number, |
276 | this might not work well. This uses $Max as a bitmask. */ |
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277 | $Max = mt_getrandmax(); |
278 | |
279 | if (! is_int($Val)) { |
280 | if (function_exists('crc32')) { |
281 | $Val = crc32($Val); |
282 | } else { |
283 | $Str = $Val; |
284 | $Pos = 0; |
285 | $Val = 0; |
286 | $Mask = $Max / 2; |
287 | $HighBit = $Max ^ $Mask; |
288 | while ($Pos < strlen($Str)) { |
289 | if ($Val & $HighBit) { |
290 | $Val = (($Val & $Mask) << 1) + 1; |
291 | } else { |
292 | $Val = ($Val & $Mask) << 1; |
293 | } |
294 | $Val ^= $Str[$Pos]; |
295 | $Pos ++; |
296 | } |
297 | } |
298 | } |
299 | |
300 | if ($Val < 0) { |
301 | $Val *= -1; |
302 | } |
303 | |
304 | if ($Val = 0) { |
305 | return; |
306 | } |
307 | |
308 | mt_srand(($Val ^ mt_rand(0, $Max)) & $Max); |
309 | } |
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310 | |
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311 | |
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312 | /** |
313 | * This function initializes the random number generator fairly well. |
314 | * It also only initializes it once, so you don't accidentally get |
315 | * the same 'random' numbers twice in one session. |
316 | */ |
317 | function sq_mt_randomize() { |
318 | global $REMOTE_PORT, $REMOTE_ADDR, $UNIQUE_ID; |
319 | static $randomized; |
320 | |
321 | if ($randomized) { |
322 | return; |
323 | } |
324 | |
325 | /* Global. */ |
326 | sq_mt_seed((int)((double) microtime() * 1000000)); |
327 | sq_mt_seed(md5($REMOTE_PORT . $REMOTE_ADDR . getmypid())); |
328 | |
329 | /* getrusage */ |
330 | if (function_exists('getrusage')) { |
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331 | /* Avoid warnings with Win32 */ |
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332 | $dat = @getrusage(); |
333 | if (isset($dat) && is_array($dat)) { |
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334 | $Str = ''; |
335 | foreach ($dat as $k => $v) |
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336 | { |
337 | $Str .= $k . $v; |
338 | } |
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339 | sq_mt_seed(md5($Str)); |
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340 | } |
341 | } |
342 | |
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343 | /* Apache-specific */ |
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344 | sq_mt_seed(md5($UNIQUE_ID)); |
345 | |
346 | $randomized = 1; |
347 | } |
348 | |
349 | function OneTimePadCreate ($length=100) { |
350 | sq_mt_randomize(); |
351 | |
352 | $pad = ''; |
353 | for ($i = 0; $i < $length; $i++) { |
354 | $pad .= chr(mt_rand(0,255)); |
355 | } |
356 | |
357 | return base64_encode($pad); |
358 | } |
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359 | |
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360 | /** |
361 | * Check if we have a required PHP-version. Return TRUE if we do, |
362 | * or FALSE if we don't. |
363 | * |
364 | * To check for 4.0.1, use sqCheckPHPVersion(4,0,1) |
365 | * To check for 4.0b3, use sqCheckPHPVersion(4,0,-3) |
366 | * |
367 | * Does not handle betas like 4.0.1b1 or development versions |
368 | */ |
369 | function sqCheckPHPVersion($major, $minor, $release) { |
370 | |
371 | $ver = phpversion(); |
372 | eregi('^([0-9]+)\\.([0-9]+)(.*)', $ver, $regs); |
373 | |
374 | /* Parse the version string. */ |
375 | $vmajor = strval($regs[1]); |
376 | $vminor = strval($regs[2]); |
377 | $vrel = $regs[3]; |
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378 | if($vrel[0] == '.') { |
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379 | $vrel = strval(substr($vrel, 1)); |
380 | } |
381 | if($vrel[0] == 'b' || $vrel[0] == 'B') { |
382 | $vrel = - strval(substr($vrel, 1)); |
383 | } |
384 | if($vrel[0] == 'r' || $vrel[0] == 'R') { |
385 | $vrel = - strval(substr($vrel, 2))/10; |
386 | } |
387 | |
388 | /* Compare major version. */ |
389 | if ($vmajor < $major) { return false; } |
390 | if ($vmajor > $major) { return true; } |
391 | |
392 | /* Major is the same. Compare minor. */ |
393 | if ($vminor < $minor) { return false; } |
394 | if ($vminor > $minor) { return true; } |
395 | |
396 | /* Major and minor is the same as the required one. Compare release */ |
4deb32f1 |
397 | if ($vrel >= 0 && $release >= 0) { /* Neither are beta */ |
66239b65 |
398 | if($vrel < $release) return false; |
4deb32f1 |
399 | } else if($vrel >= 0 && $release < 0) { /* This is not beta, required is beta */ |
66239b65 |
400 | return true; |
4deb32f1 |
401 | } else if($vrel < 0 && $release >= 0){ /* This is beta, require not beta */ |
66239b65 |
402 | return false; |
4deb32f1 |
403 | } else { /* Both are beta */ |
66239b65 |
404 | if($vrel > $release) return false; |
405 | } |
406 | |
407 | return true; |
408 | } |
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409 | |
66239b65 |
410 | /** |
411 | * Returns a string showing the size of the message/attachment. |
412 | */ |
413 | function show_readable_size($bytes) { |
414 | $bytes /= 1024; |
415 | $type = 'k'; |
416 | |
417 | if ($bytes / 1024 > 1) { |
418 | $bytes /= 1024; |
419 | $type = 'm'; |
420 | } |
421 | |
422 | if ($bytes < 10) { |
423 | $bytes *= 10; |
424 | settype($bytes, 'integer'); |
425 | $bytes /= 10; |
426 | } else { |
427 | settype($bytes, 'integer'); |
428 | } |
429 | |
430 | return $bytes . '<small> ' . $type . '</small>'; |
431 | } |
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432 | |
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433 | /** |
434 | * Generates a random string from the caracter set you pass in |
435 | * |
436 | * Flags: |
437 | * 1 = add lowercase a-z to $chars |
438 | * 2 = add uppercase A-Z to $chars |
439 | * 4 = add numbers 0-9 to $chars |
440 | */ |
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441 | |
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442 | function GenerateRandomString($size, $chars, $flags = 0) { |
443 | if ($flags & 0x1) { |
444 | $chars .= 'abcdefghijklmnopqrstuvwxyz'; |
445 | } |
446 | if ($flags & 0x2) { |
447 | $chars .= 'ABCDEFGHIJKLMNOPQRSTUVWXYZ'; |
448 | } |
449 | if ($flags & 0x4) { |
450 | $chars .= '0123456789'; |
451 | } |
452 | |
453 | if (($size < 1) || (strlen($chars) < 1)) { |
454 | return ''; |
455 | } |
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456 | |
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457 | sq_mt_randomize(); /* Initialize the random number generator */ |
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458 | |
4deb32f1 |
459 | $String = ''; |
ff4f08ff |
460 | $j = strlen( $chars ) - 1; |
66239b65 |
461 | while (strlen($String) < $size) { |
ff4f08ff |
462 | $String .= $chars{mt_rand(0, $j)}; |
66239b65 |
463 | } |
ff4f08ff |
464 | |
66239b65 |
465 | return $String; |
466 | } |
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467 | |
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468 | function quoteIMAP($str) { |
469 | return ereg_replace('(["\\])', '\\\\1', $str); |
470 | } |
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471 | |
66239b65 |
472 | /** |
473 | * Trims every element in the array |
474 | */ |
475 | function TrimArray(&$array) { |
476 | foreach ($array as $k => $v) { |
477 | global $$k; |
478 | if (is_array($$k)) { |
479 | foreach ($$k as $k2 => $v2) { |
480 | $$k[$k2] = substr($v2, 1); |
23d6bd09 |
481 | } |
66239b65 |
482 | } else { |
483 | $$k = substr($v, 1); |
23d6bd09 |
484 | } |
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485 | |
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486 | /* Re-assign back to array. */ |
66239b65 |
487 | $array[$k] = $$k; |
488 | } |
489 | } |
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490 | |
66239b65 |
491 | /** |
492 | * Removes slashes from every element in the array |
493 | */ |
494 | function RemoveSlashes(&$array) { |
495 | foreach ($array as $k => $v) { |
496 | global $$k; |
497 | if (is_array($$k)) { |
498 | foreach ($$k as $k2 => $v2) { |
499 | $newArray[stripslashes($k2)] = stripslashes($v2); |
500 | } |
501 | $$k = $newArray; |
502 | } else { |
503 | $$k = stripslashes($v); |
23d6bd09 |
504 | } |
66239b65 |
505 | |
4deb32f1 |
506 | /* Re-assign back to the array. */ |
66239b65 |
507 | $array[$k] = $$k; |
23d6bd09 |
508 | } |
66239b65 |
509 | } |
23d6bd09 |
510 | |
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511 | $PHP_SELF = php_self(); |
512 | |
1885d093 |
513 | ?> |