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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 = '1.3.3 [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]; |
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85 | } else { |
86 | $CurrentRest = ''; |
87 | } |
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88 | |
89 | if ($i == 0) { |
90 | $PreviousSpaces = $CurrentSpaces; |
91 | $body = $lines[$i]; |
92 | } else if (($PreviousSpaces == $CurrentSpaces) /* Do the beginnings match */ |
93 | && (strlen($lines[$i - 1]) > 65) /* Over 65 characters long */ |
94 | && strlen($CurrentRest)) { /* and there's a line to continue with */ |
95 | $body .= ' ' . $CurrentRest; |
96 | } else { |
97 | $body .= "\n" . $lines[$i]; |
98 | $PreviousSpaces = $CurrentSpaces; |
99 | } |
100 | } |
101 | $body .= "\n"; |
102 | } |
103 | |
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104 | /** |
105 | * If $haystack is a full mailbox name and $needle is the mailbox |
106 | * separator character, returns the last part of the mailbox name. |
107 | */ |
108 | function readShortMailboxName($haystack, $needle) { |
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109 | |
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110 | if ($needle == '') { |
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111 | $elem = $haystack; |
112 | } else { |
113 | $parts = explode($needle, $haystack); |
114 | $elem = array_pop($parts); |
115 | while ($elem == '' && count($parts)) { |
116 | $elem = array_pop($parts); |
117 | } |
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118 | } |
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119 | return( $elem ); |
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120 | } |
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121 | |
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122 | /** |
123 | * Returns an array of email addresses. |
124 | * Be cautious of "user@host.com" |
125 | */ |
126 | function parseAddrs($text) { |
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127 | if (trim($text) == '') |
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128 | return array(); |
129 | $text = str_replace(' ', '', $text); |
130 | $text = ereg_replace('"[^"]*"', '', $text); |
131 | $text = ereg_replace('\\([^\\)]*\\)', '', $text); |
132 | $text = str_replace(',', ';', $text); |
133 | $array = explode(';', $text); |
134 | for ($i = 0; $i < count ($array); $i++) { |
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135 | $array[$i] = eregi_replace ('^.*[<]', '', $array[$i]); |
136 | $array[$i] = eregi_replace ('[>].*$', '', $array[$i]); |
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137 | } |
138 | return $array; |
139 | } |
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140 | |
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141 | /** |
142 | * Returns a line of comma separated email addresses from an array. |
143 | */ |
144 | function getLineOfAddrs($array) { |
145 | if (is_array($array)) { |
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146 | $to_line = implode(', ', $array); |
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147 | $to_line = ereg_replace(', (, )+', ', ', $to_line); |
148 | $to_line = trim(ereg_replace('^, ', '', $to_line)); |
149 | if( substr( $to_line, -1 ) == ',' ) |
150 | $to_line = substr( $to_line, 0, -1 ); |
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151 | } else { |
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152 | $to_line = ''; |
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153 | } |
154 | |
155 | return( $to_line ); |
156 | } |
157 | |
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158 | function php_self () { |
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159 | global $PHP_SELF, $_SERVER; |
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160 | |
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161 | if (isset($_SERVER['REQUEST_URI']) && !empty($_SERVER['REQUEST_URI']) ) { |
162 | return $_SERVER['REQUEST_URI']; |
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163 | } |
164 | |
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165 | if (isset($PHP_SELF) && !empty($PHP_SELF)) { |
166 | return $PHP_SELF; |
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167 | } else if (isset($_SERVER['PHP_SELF']) && |
168 | !empty($_SERVER['PHP_SELF'])) { |
169 | return $_SERVER['PHP_SELF']; |
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170 | } else { |
171 | return ''; |
172 | } |
173 | } |
174 | |
175 | |
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176 | /** |
177 | * This determines the location to forward to relative to your server. |
178 | * If this doesnt work correctly for you (although it should), you can |
179 | * remove all this code except the last two lines, and change the header() |
180 | * function to look something like this, customized to the location of |
181 | * SquirrelMail on your server: |
182 | * |
183 | * http://www.myhost.com/squirrelmail/src/login.php |
184 | */ |
185 | function get_location () { |
186 | |
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187 | global $_SERVER, $imap_server_type; |
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188 | |
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189 | /* Get the path, handle virtual directories */ |
190 | $path = substr(php_self(), 0, strrpos(php_self(), '/')); |
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191 | |
192 | /* Check if this is a HTTPS or regular HTTP request. */ |
193 | $proto = 'http://'; |
194 | |
195 | /* |
196 | * If you have 'SSLOptions +StdEnvVars' in your apache config |
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197 | * OR if you have HTTPS=on in your HTTP_SERVER_VARS |
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198 | * OR if you are on port 443 |
199 | */ |
200 | $getEnvVar = getenv('HTTPS'); |
201 | if ((isset($getEnvVar) && !strcasecmp($getEnvVar, 'on')) || |
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202 | (isset($_SERVER['HTTPS']) && |
203 | !strcasecmp($_SERVER['HTTPS'], 'on')) || |
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204 | (isset($_SERVER['SERVER_PORT']) && |
205 | $_SERVER['SERVER_PORT'] == 443)) { |
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206 | $proto = 'https://'; |
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207 | } |
208 | |
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209 | /* Get the hostname from the Host header or server config. */ |
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210 | $host = ''; |
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211 | if (isset($_SERVER['HTTP_HOST']) && !empty($_SERVER['HTTP_HOST'])) { |
212 | $host = $_SERVER['HTTP_HOST']; |
213 | } else if (isset($_SERVER['SERVER_NAME']) && |
214 | !empty($_SERVER['SERVER_NAME'])) { |
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215 | } |
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216 | |
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217 | |
218 | $port = ''; |
219 | if (! strstr($host, ':')) { |
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220 | if (isset($_SERVER['SERVER_PORT'])) { |
221 | if (($_SERVER['SERVER_PORT'] != 80 && $proto == 'http://') |
222 | || ($_SERVER['SERVER_PORT'] != 443 && $proto == 'https://')) { |
223 | $port = sprintf(':%d', $_SERVER['SERVER_PORT']); |
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224 | } |
225 | } |
226 | } |
227 | |
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228 | /* this is a workaround for the weird macosx caching that |
229 | causes Apache to return 16080 as the port number, which causes |
230 | SM to bail */ |
231 | |
232 | if ($imap_server_type == 'macosx' && $port == ':16080') { |
233 | $port = ''; |
234 | } |
235 | |
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236 | /* Fallback is to omit the server name and use a relative */ |
237 | /* URI, although this is not RFC 2616 compliant. */ |
238 | return ($host ? $proto . $host . $port . $path : $path); |
239 | } |
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240 | |
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241 | |
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242 | /** |
243 | * These functions are used to encrypt the passowrd before it is |
244 | * stored in a cookie. |
245 | */ |
246 | function OneTimePadEncrypt ($string, $epad) { |
247 | $pad = base64_decode($epad); |
248 | $encrypted = ''; |
249 | for ($i = 0; $i < strlen ($string); $i++) { |
250 | $encrypted .= chr (ord($string[$i]) ^ ord($pad[$i])); |
251 | } |
252 | |
253 | return base64_encode($encrypted); |
254 | } |
255 | |
256 | function OneTimePadDecrypt ($string, $epad) { |
257 | $pad = base64_decode($epad); |
258 | $encrypted = base64_decode ($string); |
259 | $decrypted = ''; |
260 | for ($i = 0; $i < strlen ($encrypted); $i++) { |
261 | $decrypted .= chr (ord($encrypted[$i]) ^ ord($pad[$i])); |
262 | } |
263 | |
264 | return $decrypted; |
265 | } |
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266 | |
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267 | |
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268 | /** |
269 | * Randomize the mt_rand() function. Toss this in strings or integers |
270 | * and it will seed the generator appropriately. With strings, it is |
271 | * better to get them long. Use md5() to lengthen smaller strings. |
272 | */ |
273 | function sq_mt_seed($Val) { |
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274 | /* if mt_getrandmax() does not return a 2^n - 1 number, |
275 | this might not work well. This uses $Max as a bitmask. */ |
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276 | $Max = mt_getrandmax(); |
277 | |
278 | if (! is_int($Val)) { |
279 | if (function_exists('crc32')) { |
280 | $Val = crc32($Val); |
281 | } else { |
282 | $Str = $Val; |
283 | $Pos = 0; |
284 | $Val = 0; |
285 | $Mask = $Max / 2; |
286 | $HighBit = $Max ^ $Mask; |
287 | while ($Pos < strlen($Str)) { |
288 | if ($Val & $HighBit) { |
289 | $Val = (($Val & $Mask) << 1) + 1; |
290 | } else { |
291 | $Val = ($Val & $Mask) << 1; |
292 | } |
293 | $Val ^= $Str[$Pos]; |
294 | $Pos ++; |
295 | } |
296 | } |
297 | } |
298 | |
299 | if ($Val < 0) { |
300 | $Val *= -1; |
301 | } |
302 | |
303 | if ($Val = 0) { |
304 | return; |
305 | } |
306 | |
307 | mt_srand(($Val ^ mt_rand(0, $Max)) & $Max); |
308 | } |
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309 | |
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310 | |
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311 | /** |
312 | * This function initializes the random number generator fairly well. |
313 | * It also only initializes it once, so you don't accidentally get |
314 | * the same 'random' numbers twice in one session. |
315 | */ |
316 | function sq_mt_randomize() { |
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317 | global $_SERVER; |
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318 | static $randomized; |
319 | |
320 | if ($randomized) { |
321 | return; |
322 | } |
323 | |
324 | /* Global. */ |
325 | sq_mt_seed((int)((double) microtime() * 1000000)); |
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326 | sq_mt_seed(md5($_SERVER['REMOTE_PORT'] . $_SERVER['REMOTE_ADDR'] . getmypid())); |
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327 | |
328 | /* getrusage */ |
329 | if (function_exists('getrusage')) { |
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330 | /* Avoid warnings with Win32 */ |
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331 | $dat = @getrusage(); |
332 | if (isset($dat) && is_array($dat)) { |
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333 | $Str = ''; |
334 | foreach ($dat as $k => $v) |
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335 | { |
336 | $Str .= $k . $v; |
337 | } |
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338 | sq_mt_seed(md5($Str)); |
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339 | } |
340 | } |
341 | |
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342 | if(isset($_SERVER['UNIQUE_ID'])) { |
343 | sq_mt_seed(md5($_SERVER['UNIQUE_ID'])); |
344 | } |
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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] == '.') { |
66239b65 |
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 && $release >= 0) { /* Neither are beta */ |
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398 | if($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 > $release) return false; |
405 | } |
406 | |
407 | return true; |
408 | } |
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409 | |
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410 | /** |
411 | * Returns a string showing the size of the message/attachment. |
412 | */ |
413 | function show_readable_size($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 | |
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459 | $String = ''; |
ff4f08ff |
460 | $j = strlen( $chars ) - 1; |
66239b65 |
461 | while (strlen($String) < $size) { |
ff4f08ff |
462 | $String .= $chars{mt_rand(0, $j)}; |
66239b65 |
463 | } |
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464 | |
66239b65 |
465 | return $String; |
466 | } |
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467 | |
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468 | function quoteIMAP($str) { |
469 | return ereg_replace('(["\\])', '\\\\1', $str); |
470 | } |
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471 | |
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472 | /** |
473 | * Trims every element in the array |
474 | */ |
475 | function TrimArray(&$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 | ?> |