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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) 1999-2003 The SquirrelMail Project Team |
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7 | * Licensed under the GNU GPL. For full terms see the file COPYING. |
8 | * |
9 | * This 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 | require_once(SM_PATH . 'functions/global.php'); |
16 | |
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17 | /** |
18 | * SquirrelMail version number -- DO NOT CHANGE |
19 | */ |
20 | global $version; |
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21 | $version = '1.4.0 [CVS-DEVEL]'; |
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22 | |
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23 | /** |
24 | * SquirrelMail internal version number -- DO NOT CHANGE |
25 | * $sm_internal_version = array (release, major, minor) |
26 | */ |
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27 | global $SQM_INTERNAL_VERSION; |
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28 | $SQM_INTERNAL_VERSION = array(1,4,0); |
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29 | |
30 | |
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31 | /** |
32 | * Wraps text at $wrap characters |
33 | * |
34 | * Has a problem with special HTML characters, so call this before |
35 | * you do character translation. |
36 | * |
37 | * Specifically, ' comes up as 5 characters instead of 1. |
38 | * This should not add newlines to the end of lines. |
39 | */ |
40 | function sqWordWrap(&$line, $wrap) { |
41 | ereg("^([\t >]*)([^\t >].*)?$", $line, $regs); |
42 | $beginning_spaces = $regs[1]; |
43 | if (isset($regs[2])) { |
44 | $words = explode(' ', $regs[2]); |
45 | } else { |
46 | $words = ''; |
47 | } |
48 | |
49 | $i = 0; |
50 | $line = $beginning_spaces; |
51 | |
52 | while ($i < count($words)) { |
53 | /* Force one word to be on a line (minimum) */ |
54 | $line .= $words[$i]; |
55 | $line_len = strlen($beginning_spaces) + strlen($words[$i]) + 2; |
56 | if (isset($words[$i + 1])) |
57 | $line_len += strlen($words[$i + 1]); |
58 | $i ++; |
59 | |
60 | /* Add more words (as long as they fit) */ |
61 | while ($line_len < $wrap && $i < count($words)) { |
62 | $line .= ' ' . $words[$i]; |
63 | $i++; |
64 | if (isset($words[$i])) |
65 | $line_len += strlen($words[$i]) + 1; |
66 | else |
67 | $line_len += 1; |
68 | } |
69 | |
70 | /* Skip spaces if they are the first thing on a continued line */ |
71 | while (!isset($words[$i]) && $i < count($words)) { |
72 | $i ++; |
73 | } |
74 | |
75 | /* Go to the next line if we have more to process */ |
76 | if ($i < count($words)) { |
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77 | $line .= "\n"; |
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78 | } |
79 | } |
80 | } |
81 | |
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82 | /** |
83 | * Does the opposite of sqWordWrap() |
84 | */ |
85 | function sqUnWordWrap(&$body) { |
86 | $lines = explode("\n", $body); |
87 | $body = ''; |
88 | $PreviousSpaces = ''; |
89 | $cnt = count($lines); |
90 | for ($i = 0; $i < $cnt; $i ++) { |
91 | preg_match("/^([\t >]*)([^\t >].*)?$/", $lines[$i], $regs); |
92 | $CurrentSpaces = $regs[1]; |
93 | if (isset($regs[2])) { |
94 | $CurrentRest = $regs[2]; |
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95 | } else { |
96 | $CurrentRest = ''; |
97 | } |
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98 | |
99 | if ($i == 0) { |
100 | $PreviousSpaces = $CurrentSpaces; |
101 | $body = $lines[$i]; |
102 | } else if (($PreviousSpaces == $CurrentSpaces) /* Do the beginnings match */ |
103 | && (strlen($lines[$i - 1]) > 65) /* Over 65 characters long */ |
104 | && strlen($CurrentRest)) { /* and there's a line to continue with */ |
105 | $body .= ' ' . $CurrentRest; |
106 | } else { |
107 | $body .= "\n" . $lines[$i]; |
108 | $PreviousSpaces = $CurrentSpaces; |
109 | } |
110 | } |
111 | $body .= "\n"; |
112 | } |
113 | |
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114 | /** |
115 | * If $haystack is a full mailbox name and $needle is the mailbox |
116 | * separator character, returns the last part of the mailbox name. |
117 | */ |
118 | function readShortMailboxName($haystack, $needle) { |
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119 | |
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120 | if ($needle == '') { |
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121 | $elem = $haystack; |
122 | } else { |
123 | $parts = explode($needle, $haystack); |
124 | $elem = array_pop($parts); |
125 | while ($elem == '' && count($parts)) { |
126 | $elem = array_pop($parts); |
127 | } |
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128 | } |
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129 | return( $elem ); |
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130 | } |
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131 | |
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132 | /** |
133 | * Returns an array of email addresses. |
134 | * Be cautious of "user@host.com" |
135 | */ |
136 | function parseAddrs($text) { |
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137 | if (trim($text) == '') |
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138 | return array(); |
139 | $text = str_replace(' ', '', $text); |
140 | $text = ereg_replace('"[^"]*"', '', $text); |
141 | $text = ereg_replace('\\([^\\)]*\\)', '', $text); |
142 | $text = str_replace(',', ';', $text); |
143 | $array = explode(';', $text); |
144 | for ($i = 0; $i < count ($array); $i++) { |
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145 | $array[$i] = eregi_replace ('^.*[<]', '', $array[$i]); |
146 | $array[$i] = eregi_replace ('[>].*$', '', $array[$i]); |
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147 | } |
148 | return $array; |
149 | } |
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150 | |
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151 | /** |
152 | * Returns a line of comma separated email addresses from an array. |
153 | */ |
154 | function getLineOfAddrs($array) { |
155 | if (is_array($array)) { |
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156 | $to_line = implode(', ', $array); |
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157 | $to_line = ereg_replace(', (, )+', ', ', $to_line); |
158 | $to_line = trim(ereg_replace('^, ', '', $to_line)); |
159 | if( substr( $to_line, -1 ) == ',' ) |
160 | $to_line = substr( $to_line, 0, -1 ); |
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161 | } else { |
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162 | $to_line = ''; |
66239b65 |
163 | } |
164 | |
165 | return( $to_line ); |
166 | } |
167 | |
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168 | function php_self () { |
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169 | if ( sqgetGlobalVar('REQUEST_URI', $req_uri, SQ_SERVER) && !empty($req_uri) ) { |
170 | return $req_uri; |
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171 | } |
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172 | |
173 | if ( sqgetGlobalVar('PHP_SELF', $php_self, SQ_SERVER) && !empty($php_self) ) { |
174 | return $php_self; |
175 | } |
176 | |
177 | return ''; |
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178 | } |
179 | |
180 | |
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181 | /** |
182 | * This determines the location to forward to relative to your server. |
183 | * If this doesnt work correctly for you (although it should), you can |
184 | * remove all this code except the last two lines, and change the header() |
185 | * function to look something like this, customized to the location of |
186 | * SquirrelMail on your server: |
187 | * |
188 | * http://www.myhost.com/squirrelmail/src/login.php |
189 | */ |
190 | function get_location () { |
191 | |
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192 | global $imap_server_type; |
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193 | |
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194 | /* Get the path, handle virtual directories */ |
195 | $path = substr(php_self(), 0, strrpos(php_self(), '/')); |
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196 | |
197 | if ( sqgetGlobalVar('sq_base_url', $full_url, SQ_SESSION) ) { |
198 | return $full_url . $path; |
199 | } |
200 | |
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201 | /* Check if this is a HTTPS or regular HTTP request. */ |
202 | $proto = 'http://'; |
203 | |
204 | /* |
205 | * If you have 'SSLOptions +StdEnvVars' in your apache config |
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206 | * OR if you have HTTPS=on in your HTTP_SERVER_VARS |
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207 | * OR if you are on port 443 |
208 | */ |
209 | $getEnvVar = getenv('HTTPS'); |
210 | if ((isset($getEnvVar) && !strcasecmp($getEnvVar, 'on')) || |
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211 | (sqgetGlobalVar('HTTPS', $https_on, SQ_SERVER) && !strcasecmp($https_on, 'on')) || |
212 | (sqgetGlobalVar('SERVER_PORT', $server_port, SQ_SERVER) && $server_port == 443)) { |
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213 | $proto = 'https://'; |
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214 | } |
215 | |
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216 | /* Get the hostname from the Host header or server config. */ |
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217 | if ( !sqgetGlobalVar('HTTP_HOST', $host, SQ_SERVER) || empty($host) ) { |
218 | if ( !sqgetGlobalVar('SERVER_NAME', $host, SQ_SERVER) || empty($host) ) { |
219 | $host = ''; |
220 | } |
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221 | } |
222 | |
223 | $port = ''; |
224 | if (! strstr($host, ':')) { |
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225 | if (sqgetGlobalVar('SERVER_PORT', $server_port, SQ_SERVER)) { |
226 | if (($server_port != 80 && $proto == 'http://') || |
227 | ($server_port != 443 && $proto == 'https://')) { |
228 | $port = sprintf(':%d', $server_port); |
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229 | } |
230 | } |
231 | } |
232 | |
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233 | /* this is a workaround for the weird macosx caching that |
234 | causes Apache to return 16080 as the port number, which causes |
235 | SM to bail */ |
236 | |
237 | if ($imap_server_type == 'macosx' && $port == ':16080') { |
238 | $port = ''; |
239 | } |
240 | |
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241 | /* Fallback is to omit the server name and use a relative */ |
242 | /* URI, although this is not RFC 2616 compliant. */ |
243 | $full_url = ($host ? $proto . $host . $port : ''); |
244 | sqsession_register($full_url, 'sq_base_url'); |
245 | return $full_url . $path; |
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246 | } |
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247 | |
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248 | |
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249 | /** |
250 | * These functions are used to encrypt the passowrd before it is |
251 | * stored in a cookie. |
252 | */ |
253 | function OneTimePadEncrypt ($string, $epad) { |
254 | $pad = base64_decode($epad); |
255 | $encrypted = ''; |
256 | for ($i = 0; $i < strlen ($string); $i++) { |
257 | $encrypted .= chr (ord($string[$i]) ^ ord($pad[$i])); |
258 | } |
259 | |
260 | return base64_encode($encrypted); |
261 | } |
262 | |
263 | function OneTimePadDecrypt ($string, $epad) { |
264 | $pad = base64_decode($epad); |
265 | $encrypted = base64_decode ($string); |
266 | $decrypted = ''; |
267 | for ($i = 0; $i < strlen ($encrypted); $i++) { |
268 | $decrypted .= chr (ord($encrypted[$i]) ^ ord($pad[$i])); |
269 | } |
270 | |
271 | return $decrypted; |
272 | } |
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273 | |
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274 | |
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275 | /** |
276 | * Randomize the mt_rand() function. Toss this in strings or integers |
277 | * and it will seed the generator appropriately. With strings, it is |
278 | * better to get them long. Use md5() to lengthen smaller strings. |
279 | */ |
280 | function sq_mt_seed($Val) { |
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281 | /* if mt_getrandmax() does not return a 2^n - 1 number, |
282 | this might not work well. This uses $Max as a bitmask. */ |
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283 | $Max = mt_getrandmax(); |
284 | |
285 | if (! is_int($Val)) { |
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286 | $Val = crc32($Val); |
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287 | } |
288 | |
289 | if ($Val < 0) { |
290 | $Val *= -1; |
291 | } |
292 | |
293 | if ($Val = 0) { |
294 | return; |
295 | } |
296 | |
297 | mt_srand(($Val ^ mt_rand(0, $Max)) & $Max); |
298 | } |
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299 | |
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300 | |
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301 | /** |
302 | * This function initializes the random number generator fairly well. |
303 | * It also only initializes it once, so you don't accidentally get |
304 | * the same 'random' numbers twice in one session. |
305 | */ |
306 | function sq_mt_randomize() { |
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307 | static $randomized; |
308 | |
309 | if ($randomized) { |
310 | return; |
311 | } |
312 | |
313 | /* Global. */ |
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314 | sqgetGlobalVar('REMOTE_PORT', $remote_port, SQ_SERVER); |
315 | sqgetGlobalVar('REMOTE_ADDR', $remote_addr, SQ_SERVER); |
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316 | sq_mt_seed((int)((double) microtime() * 1000000)); |
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317 | sq_mt_seed(md5($remote_port . $remote_addr . getmypid())); |
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318 | |
319 | /* getrusage */ |
320 | if (function_exists('getrusage')) { |
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321 | /* Avoid warnings with Win32 */ |
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322 | $dat = @getrusage(); |
323 | if (isset($dat) && is_array($dat)) { |
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324 | $Str = ''; |
325 | foreach ($dat as $k => $v) |
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326 | { |
327 | $Str .= $k . $v; |
328 | } |
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329 | sq_mt_seed(md5($Str)); |
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330 | } |
331 | } |
332 | |
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333 | if(sqgetGlobalVar('UNIQUE_ID', $unique_id, SQ_SERVER)) { |
334 | sq_mt_seed(md5($unique_id)); |
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335 | } |
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336 | |
337 | $randomized = 1; |
338 | } |
339 | |
340 | function OneTimePadCreate ($length=100) { |
341 | sq_mt_randomize(); |
342 | |
343 | $pad = ''; |
344 | for ($i = 0; $i < $length; $i++) { |
345 | $pad .= chr(mt_rand(0,255)); |
346 | } |
347 | |
348 | return base64_encode($pad); |
349 | } |
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350 | |
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351 | /** |
352 | * Returns a string showing the size of the message/attachment. |
353 | */ |
354 | function show_readable_size($bytes) { |
355 | $bytes /= 1024; |
356 | $type = 'k'; |
357 | |
358 | if ($bytes / 1024 > 1) { |
359 | $bytes /= 1024; |
e5f1e71c |
360 | $type = 'M'; |
66239b65 |
361 | } |
362 | |
363 | if ($bytes < 10) { |
364 | $bytes *= 10; |
365 | settype($bytes, 'integer'); |
366 | $bytes /= 10; |
367 | } else { |
368 | settype($bytes, 'integer'); |
369 | } |
370 | |
371 | return $bytes . '<small> ' . $type . '</small>'; |
372 | } |
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373 | |
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374 | /** |
375 | * Generates a random string from the caracter set you pass in |
376 | * |
377 | * Flags: |
378 | * 1 = add lowercase a-z to $chars |
379 | * 2 = add uppercase A-Z to $chars |
380 | * 4 = add numbers 0-9 to $chars |
381 | */ |
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382 | |
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383 | function GenerateRandomString($size, $chars, $flags = 0) { |
384 | if ($flags & 0x1) { |
385 | $chars .= 'abcdefghijklmnopqrstuvwxyz'; |
386 | } |
387 | if ($flags & 0x2) { |
388 | $chars .= 'ABCDEFGHIJKLMNOPQRSTUVWXYZ'; |
389 | } |
390 | if ($flags & 0x4) { |
391 | $chars .= '0123456789'; |
392 | } |
393 | |
394 | if (($size < 1) || (strlen($chars) < 1)) { |
395 | return ''; |
396 | } |
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397 | |
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398 | sq_mt_randomize(); /* Initialize the random number generator */ |
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399 | |
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400 | $String = ''; |
ff4f08ff |
401 | $j = strlen( $chars ) - 1; |
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402 | while (strlen($String) < $size) { |
ff4f08ff |
403 | $String .= $chars{mt_rand(0, $j)}; |
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404 | } |
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405 | |
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406 | return $String; |
407 | } |
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408 | |
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409 | function quoteimap($str) { |
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410 | return ereg_replace('(["\\])', '\\\\1', $str); |
411 | } |
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412 | |
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413 | /** |
414 | * Trims every element in the array |
415 | */ |
416 | function TrimArray(&$array) { |
417 | foreach ($array as $k => $v) { |
418 | global $$k; |
419 | if (is_array($$k)) { |
420 | foreach ($$k as $k2 => $v2) { |
421 | $$k[$k2] = substr($v2, 1); |
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422 | } |
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423 | } else { |
424 | $$k = substr($v, 1); |
23d6bd09 |
425 | } |
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426 | |
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427 | /* Re-assign back to array. */ |
66239b65 |
428 | $array[$k] = $$k; |
429 | } |
430 | } |
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431 | |
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432 | /** |
433 | * Removes slashes from every element in the array |
434 | */ |
435 | function RemoveSlashes(&$array) { |
436 | foreach ($array as $k => $v) { |
437 | global $$k; |
438 | if (is_array($$k)) { |
439 | foreach ($$k as $k2 => $v2) { |
440 | $newArray[stripslashes($k2)] = stripslashes($v2); |
441 | } |
442 | $$k = $newArray; |
443 | } else { |
444 | $$k = stripslashes($v); |
23d6bd09 |
445 | } |
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446 | |
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447 | /* Re-assign back to the array. */ |
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448 | $array[$k] = $$k; |
23d6bd09 |
449 | } |
66239b65 |
450 | } |
23d6bd09 |
451 | |
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452 | $PHP_SELF = php_self(); |
453 | |
1885d093 |
454 | ?> |