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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 | |
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16 | /** |
17 | * SquirrelMail version number -- DO NOT CHANGE |
18 | */ |
19 | global $version; |
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20 | $version = '1.5.0 [CVS]'; |
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21 | |
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22 | /** |
23 | * SquirrelMail internal version number -- DO NOT CHANGE |
24 | * $sm_internal_version = array (release, major, minor) |
25 | */ |
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26 | global $SQM_INTERNAL_VERSION; |
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27 | $SQM_INTERNAL_VERSION = array(1,5,0); |
28 | |
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29 | |
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30 | /** |
31 | * There can be a circular issue with includes, where the $version string is |
32 | * referenced by the include of global.php, etc. before it's defined. |
33 | * For that reason, bring in global.php AFTER we define the version strings. |
34 | */ |
35 | require_once(SM_PATH . 'functions/global.php'); |
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36 | |
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37 | /** |
38 | * Wraps text at $wrap characters |
39 | * |
40 | * Has a problem with special HTML characters, so call this before |
41 | * you do character translation. |
42 | * |
43 | * Specifically, ' comes up as 5 characters instead of 1. |
44 | * This should not add newlines to the end of lines. |
45 | */ |
46 | function sqWordWrap(&$line, $wrap) { |
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47 | global $languages, $squirrelmail_language; |
48 | |
49 | if (isset($languages[$squirrelmail_language]['XTRA_CODE']) && |
50 | function_exists($languages[$squirrelmail_language]['XTRA_CODE'])) { |
51 | if (mb_detect_encoding($line) != 'ASCII') { |
52 | $line = $languages[$squirrelmail_language]['XTRA_CODE']('wordwrap', $line, $wrap); |
53 | return; |
54 | } |
55 | } |
56 | |
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57 | ereg("^([\t >]*)([^\t >].*)?$", $line, $regs); |
58 | $beginning_spaces = $regs[1]; |
59 | if (isset($regs[2])) { |
60 | $words = explode(' ', $regs[2]); |
61 | } else { |
62 | $words = ''; |
63 | } |
64 | |
65 | $i = 0; |
66 | $line = $beginning_spaces; |
67 | |
68 | while ($i < count($words)) { |
69 | /* Force one word to be on a line (minimum) */ |
70 | $line .= $words[$i]; |
71 | $line_len = strlen($beginning_spaces) + strlen($words[$i]) + 2; |
72 | if (isset($words[$i + 1])) |
73 | $line_len += strlen($words[$i + 1]); |
74 | $i ++; |
75 | |
76 | /* Add more words (as long as they fit) */ |
77 | while ($line_len < $wrap && $i < count($words)) { |
78 | $line .= ' ' . $words[$i]; |
79 | $i++; |
80 | if (isset($words[$i])) |
81 | $line_len += strlen($words[$i]) + 1; |
82 | else |
83 | $line_len += 1; |
84 | } |
85 | |
86 | /* Skip spaces if they are the first thing on a continued line */ |
87 | while (!isset($words[$i]) && $i < count($words)) { |
88 | $i ++; |
89 | } |
90 | |
91 | /* Go to the next line if we have more to process */ |
92 | if ($i < count($words)) { |
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93 | $line .= "\n"; |
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94 | } |
95 | } |
96 | } |
97 | |
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98 | /** |
99 | * Does the opposite of sqWordWrap() |
100 | */ |
101 | function sqUnWordWrap(&$body) { |
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102 | global $squirrelmail_language; |
103 | |
104 | if ($squirrelmail_language == 'ja_JP') { |
105 | return; |
106 | } |
107 | |
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108 | $lines = explode("\n", $body); |
109 | $body = ''; |
110 | $PreviousSpaces = ''; |
111 | $cnt = count($lines); |
112 | for ($i = 0; $i < $cnt; $i ++) { |
113 | preg_match("/^([\t >]*)([^\t >].*)?$/", $lines[$i], $regs); |
114 | $CurrentSpaces = $regs[1]; |
115 | if (isset($regs[2])) { |
116 | $CurrentRest = $regs[2]; |
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117 | } else { |
118 | $CurrentRest = ''; |
119 | } |
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120 | |
121 | if ($i == 0) { |
122 | $PreviousSpaces = $CurrentSpaces; |
123 | $body = $lines[$i]; |
124 | } else if (($PreviousSpaces == $CurrentSpaces) /* Do the beginnings match */ |
125 | && (strlen($lines[$i - 1]) > 65) /* Over 65 characters long */ |
126 | && strlen($CurrentRest)) { /* and there's a line to continue with */ |
127 | $body .= ' ' . $CurrentRest; |
128 | } else { |
129 | $body .= "\n" . $lines[$i]; |
130 | $PreviousSpaces = $CurrentSpaces; |
131 | } |
132 | } |
133 | $body .= "\n"; |
134 | } |
135 | |
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136 | /** |
137 | * If $haystack is a full mailbox name and $needle is the mailbox |
138 | * separator character, returns the last part of the mailbox name. |
139 | */ |
140 | function readShortMailboxName($haystack, $needle) { |
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141 | |
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142 | if ($needle == '') { |
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143 | $elem = $haystack; |
144 | } else { |
145 | $parts = explode($needle, $haystack); |
146 | $elem = array_pop($parts); |
147 | while ($elem == '' && count($parts)) { |
148 | $elem = array_pop($parts); |
149 | } |
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150 | } |
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151 | return( $elem ); |
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152 | } |
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153 | |
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154 | function php_self () { |
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155 | if ( sqgetGlobalVar('REQUEST_URI', $req_uri, SQ_SERVER) && !empty($req_uri) ) { |
156 | return $req_uri; |
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157 | } |
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158 | |
159 | if ( sqgetGlobalVar('PHP_SELF', $php_self, SQ_SERVER) && !empty($php_self) ) { |
160 | return $php_self; |
161 | } |
162 | |
163 | return ''; |
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164 | } |
165 | |
166 | |
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167 | /** |
168 | * This determines the location to forward to relative to your server. |
169 | * If this doesnt work correctly for you (although it should), you can |
170 | * remove all this code except the last two lines, and change the header() |
171 | * function to look something like this, customized to the location of |
172 | * SquirrelMail on your server: |
173 | * |
174 | * http://www.myhost.com/squirrelmail/src/login.php |
175 | */ |
176 | function get_location () { |
177 | |
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178 | global $imap_server_type; |
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179 | |
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180 | /* Get the path, handle virtual directories */ |
181 | $path = substr(php_self(), 0, strrpos(php_self(), '/')); |
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182 | |
183 | if ( sqgetGlobalVar('sq_base_url', $full_url, SQ_SESSION) ) { |
184 | return $full_url . $path; |
185 | } |
186 | |
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187 | /* Check if this is a HTTPS or regular HTTP request. */ |
188 | $proto = 'http://'; |
189 | |
190 | /* |
191 | * If you have 'SSLOptions +StdEnvVars' in your apache config |
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192 | * OR if you have HTTPS=on in your HTTP_SERVER_VARS |
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193 | * OR if you are on port 443 |
194 | */ |
195 | $getEnvVar = getenv('HTTPS'); |
196 | if ((isset($getEnvVar) && !strcasecmp($getEnvVar, 'on')) || |
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197 | (sqgetGlobalVar('HTTPS', $https_on, SQ_SERVER) && !strcasecmp($https_on, 'on')) || |
198 | (sqgetGlobalVar('SERVER_PORT', $server_port, SQ_SERVER) && $server_port == 443)) { |
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199 | $proto = 'https://'; |
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200 | } |
201 | |
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202 | /* Get the hostname from the Host header or server config. */ |
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203 | if ( !sqgetGlobalVar('HTTP_HOST', $host, SQ_SERVER) || empty($host) ) { |
204 | if ( !sqgetGlobalVar('SERVER_NAME', $host, SQ_SERVER) || empty($host) ) { |
205 | $host = ''; |
206 | } |
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207 | } |
208 | |
209 | $port = ''; |
210 | if (! strstr($host, ':')) { |
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211 | if (sqgetGlobalVar('SERVER_PORT', $server_port, SQ_SERVER)) { |
212 | if (($server_port != 80 && $proto == 'http://') || |
213 | ($server_port != 443 && $proto == 'https://')) { |
214 | $port = sprintf(':%d', $server_port); |
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215 | } |
216 | } |
217 | } |
218 | |
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219 | /* this is a workaround for the weird macosx caching that |
220 | causes Apache to return 16080 as the port number, which causes |
221 | SM to bail */ |
222 | |
223 | if ($imap_server_type == 'macosx' && $port == ':16080') { |
224 | $port = ''; |
225 | } |
226 | |
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227 | /* Fallback is to omit the server name and use a relative */ |
228 | /* URI, although this is not RFC 2616 compliant. */ |
229 | $full_url = ($host ? $proto . $host . $port : ''); |
230 | sqsession_register($full_url, 'sq_base_url'); |
231 | return $full_url . $path; |
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232 | } |
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233 | |
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234 | |
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235 | /** |
236 | * These functions are used to encrypt the passowrd before it is |
237 | * stored in a cookie. |
238 | */ |
239 | function OneTimePadEncrypt ($string, $epad) { |
240 | $pad = base64_decode($epad); |
241 | $encrypted = ''; |
242 | for ($i = 0; $i < strlen ($string); $i++) { |
243 | $encrypted .= chr (ord($string[$i]) ^ ord($pad[$i])); |
244 | } |
245 | |
246 | return base64_encode($encrypted); |
247 | } |
248 | |
249 | function OneTimePadDecrypt ($string, $epad) { |
250 | $pad = base64_decode($epad); |
251 | $encrypted = base64_decode ($string); |
252 | $decrypted = ''; |
253 | for ($i = 0; $i < strlen ($encrypted); $i++) { |
254 | $decrypted .= chr (ord($encrypted[$i]) ^ ord($pad[$i])); |
255 | } |
256 | |
257 | return $decrypted; |
258 | } |
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259 | |
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260 | |
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261 | /** |
262 | * Randomize the mt_rand() function. Toss this in strings or integers |
263 | * and it will seed the generator appropriately. With strings, it is |
264 | * better to get them long. Use md5() to lengthen smaller strings. |
265 | */ |
266 | function sq_mt_seed($Val) { |
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267 | /* if mt_getrandmax() does not return a 2^n - 1 number, |
268 | this might not work well. This uses $Max as a bitmask. */ |
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269 | $Max = mt_getrandmax(); |
270 | |
271 | if (! is_int($Val)) { |
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272 | $Val = crc32($Val); |
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273 | } |
274 | |
275 | if ($Val < 0) { |
276 | $Val *= -1; |
277 | } |
278 | |
279 | if ($Val = 0) { |
280 | return; |
281 | } |
282 | |
283 | mt_srand(($Val ^ mt_rand(0, $Max)) & $Max); |
284 | } |
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285 | |
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286 | |
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287 | /** |
288 | * This function initializes the random number generator fairly well. |
289 | * It also only initializes it once, so you don't accidentally get |
290 | * the same 'random' numbers twice in one session. |
291 | */ |
292 | function sq_mt_randomize() { |
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293 | static $randomized; |
294 | |
295 | if ($randomized) { |
296 | return; |
297 | } |
298 | |
299 | /* Global. */ |
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300 | sqgetGlobalVar('REMOTE_PORT', $remote_port, SQ_SERVER); |
301 | sqgetGlobalVar('REMOTE_ADDR', $remote_addr, SQ_SERVER); |
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302 | sq_mt_seed((int)((double) microtime() * 1000000)); |
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303 | sq_mt_seed(md5($remote_port . $remote_addr . getmypid())); |
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304 | |
305 | /* getrusage */ |
306 | if (function_exists('getrusage')) { |
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307 | /* Avoid warnings with Win32 */ |
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308 | $dat = @getrusage(); |
309 | if (isset($dat) && is_array($dat)) { |
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310 | $Str = ''; |
311 | foreach ($dat as $k => $v) |
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312 | { |
313 | $Str .= $k . $v; |
314 | } |
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315 | sq_mt_seed(md5($Str)); |
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316 | } |
317 | } |
318 | |
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319 | if(sqgetGlobalVar('UNIQUE_ID', $unique_id, SQ_SERVER)) { |
320 | sq_mt_seed(md5($unique_id)); |
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321 | } |
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322 | |
323 | $randomized = 1; |
324 | } |
325 | |
326 | function OneTimePadCreate ($length=100) { |
327 | sq_mt_randomize(); |
328 | |
329 | $pad = ''; |
330 | for ($i = 0; $i < $length; $i++) { |
331 | $pad .= chr(mt_rand(0,255)); |
332 | } |
333 | |
334 | return base64_encode($pad); |
335 | } |
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336 | |
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337 | /** |
338 | * Returns a string showing the size of the message/attachment. |
339 | */ |
340 | function show_readable_size($bytes) { |
341 | $bytes /= 1024; |
342 | $type = 'k'; |
343 | |
344 | if ($bytes / 1024 > 1) { |
345 | $bytes /= 1024; |
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346 | $type = 'M'; |
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347 | } |
348 | |
349 | if ($bytes < 10) { |
350 | $bytes *= 10; |
351 | settype($bytes, 'integer'); |
352 | $bytes /= 10; |
353 | } else { |
354 | settype($bytes, 'integer'); |
355 | } |
356 | |
357 | return $bytes . '<small> ' . $type . '</small>'; |
358 | } |
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359 | |
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360 | /** |
361 | * Generates a random string from the caracter set you pass in |
362 | * |
363 | * Flags: |
364 | * 1 = add lowercase a-z to $chars |
365 | * 2 = add uppercase A-Z to $chars |
366 | * 4 = add numbers 0-9 to $chars |
367 | */ |
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368 | |
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369 | function GenerateRandomString($size, $chars, $flags = 0) { |
370 | if ($flags & 0x1) { |
371 | $chars .= 'abcdefghijklmnopqrstuvwxyz'; |
372 | } |
373 | if ($flags & 0x2) { |
374 | $chars .= 'ABCDEFGHIJKLMNOPQRSTUVWXYZ'; |
375 | } |
376 | if ($flags & 0x4) { |
377 | $chars .= '0123456789'; |
378 | } |
379 | |
380 | if (($size < 1) || (strlen($chars) < 1)) { |
381 | return ''; |
382 | } |
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383 | |
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384 | sq_mt_randomize(); /* Initialize the random number generator */ |
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385 | |
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386 | $String = ''; |
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387 | $j = strlen( $chars ) - 1; |
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388 | while (strlen($String) < $size) { |
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389 | $String .= $chars{mt_rand(0, $j)}; |
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390 | } |
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391 | |
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392 | return $String; |
393 | } |
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394 | |
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395 | function quoteimap($str) { |
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396 | return ereg_replace('(["\\])', '\\\\1', $str); |
397 | } |
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398 | |
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399 | /** |
400 | * Trims every element in the array |
401 | */ |
402 | function TrimArray(&$array) { |
403 | foreach ($array as $k => $v) { |
404 | global $$k; |
405 | if (is_array($$k)) { |
406 | foreach ($$k as $k2 => $v2) { |
407 | $$k[$k2] = substr($v2, 1); |
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408 | } |
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409 | } else { |
410 | $$k = substr($v, 1); |
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411 | } |
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412 | |
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413 | /* Re-assign back to array. */ |
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414 | $array[$k] = $$k; |
415 | } |
416 | } |
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417 | |
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418 | /* returns a link to the compose-page, taking in consideration |
419 | * the compose_in_new and javascript settings. */ |
420 | function makeComposeLink($url, $text = null) |
421 | { |
422 | global $compose_new_win,$javascript_on; |
423 | |
424 | if(!$text) { |
425 | $text = _("Compose"); |
426 | } |
427 | |
428 | if($compose_new_win != '1') { |
429 | return makeInternalLink($url, $text, 'right'); |
430 | } |
431 | |
432 | /* if we can use JS, use the fancy window, else just open a new one HTML-style */ |
433 | if($javascript_on) { |
434 | sqgetGlobalVar('base_uri', $base_uri, SQ_SESSION); |
435 | return '<a href="javascript:void(0)" onclick="comp_in_new(\''.$base_uri.$url.'\')">'. $text.'</a>'; |
436 | } |
437 | |
438 | return makeInternalLink($url, $text, '_blank'); |
439 | } |
440 | |
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441 | $PHP_SELF = php_self(); |
442 | |
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443 | ?> |