| 1 | <?php |
| 2 | |
| 3 | /** |
| 4 | * imap_general.php |
| 5 | * |
| 6 | * Copyright (c) 1999-2003 The SquirrelMail Project Team |
| 7 | * Licensed under the GNU GPL. For full terms see the file COPYING. |
| 8 | * |
| 9 | * This implements all functions that do general imap functions. |
| 10 | * |
| 11 | * $Id$ |
| 12 | */ |
| 13 | |
| 14 | require_once(SM_PATH . 'functions/page_header.php'); |
| 15 | require_once(SM_PATH . 'functions/auth.php'); |
| 16 | |
| 17 | |
| 18 | global $sqimap_session_id; |
| 19 | $sqimap_session_id = 1; |
| 20 | |
| 21 | /* Sets an unique session id in order to avoid simultanous sessions crash. */ |
| 22 | function sqimap_session_id($unique_id = false) { |
| 23 | global $data_dir, $username, $sqimap_session_id; |
| 24 | if (!$unique_id) { |
| 25 | return( sprintf("A%03d", $sqimap_session_id++) ); |
| 26 | } else { |
| 27 | return( sprintf("A%03d", $sqimap_session_id++) . ' UID' ); |
| 28 | } |
| 29 | } |
| 30 | |
| 31 | /* |
| 32 | * Both send a command and accept the result from the command. |
| 33 | * This is to allow proper session number handling. |
| 34 | */ |
| 35 | function sqimap_run_command_list ($imap_stream, $query, $handle_errors, &$response, &$message, $unique_id = false) { |
| 36 | if ($imap_stream) { |
| 37 | $sid = sqimap_session_id($unique_id); |
| 38 | fputs ($imap_stream, $sid . ' ' . $query . "\r\n"); |
| 39 | $tag_uid_a = explode(' ',trim($sid)); |
| 40 | $tag = $tag_uid_a[0]; |
| 41 | $read = sqimap_read_data_list ($imap_stream, $tag, $handle_errors, $response, $message, $query ); |
| 42 | /* get the response and the message */ |
| 43 | $message = $message[$tag]; |
| 44 | $response = $response[$tag]; |
| 45 | return $read[$tag]; |
| 46 | } else { |
| 47 | global $squirrelmail_language, $color; |
| 48 | set_up_language($squirrelmail_language); |
| 49 | require_once(SM_PATH . 'functions/display_messages.php'); |
| 50 | $string = "<b><font color=$color[2]>\n" . |
| 51 | _("ERROR : No available imapstream.") . |
| 52 | "</b></font>\n"; |
| 53 | error_box($string,$color); |
| 54 | return false; |
| 55 | } |
| 56 | } |
| 57 | |
| 58 | function sqimap_run_command ($imap_stream, $query, $handle_errors, &$response, |
| 59 | &$message, $unique_id = false,$filter=false, |
| 60 | $outputstream=false,$no_return=false) { |
| 61 | if ($imap_stream) { |
| 62 | $sid = sqimap_session_id($unique_id); |
| 63 | fputs ($imap_stream, $sid . ' ' . $query . "\r\n"); |
| 64 | $tag_uid_a = explode(' ',trim($sid)); |
| 65 | $tag = $tag_uid_a[0]; |
| 66 | |
| 67 | $read = sqimap_read_data ($imap_stream, $tag, $handle_errors, $response, |
| 68 | $message, $query,$filter,$outputstream,$no_return); |
| 69 | /* retrieve the response and the message */ |
| 70 | $response = $response[$tag]; |
| 71 | $message = $message[$tag]; |
| 72 | |
| 73 | if (!empty($read[$tag])) { |
| 74 | return $read[$tag][0]; |
| 75 | } else { |
| 76 | return $read[$tag]; |
| 77 | } |
| 78 | } else { |
| 79 | global $squirrelmail_language, $color; |
| 80 | set_up_language($squirrelmail_language); |
| 81 | require_once(SM_PATH . 'functions/display_messages.php'); |
| 82 | $string = "<b><font color=$color[2]>\n" . |
| 83 | _("ERROR : No available imapstream.") . |
| 84 | "</b></font>\n"; |
| 85 | error_box($string,$color); |
| 86 | return false; |
| 87 | } |
| 88 | } |
| 89 | function sqimap_prepare_pipelined_query($new_query,&$tag,&$aQuery,$unique_id) { |
| 90 | $sid = sqimap_session_id($unique_id); |
| 91 | $tag_uid_a = explode(' ',trim($sid)); |
| 92 | $tag = $tag_uid_a[0]; |
| 93 | $query = $sid . ' '.$new_query."\n"; |
| 94 | $aQuery[$tag] = $query; |
| 95 | } |
| 96 | |
| 97 | function sqimap_run_pipelined_command ($imap_stream, $aQuery, $handle_errors, |
| 98 | &$aServerResponse, &$aServerMessage, $unique_id = false, |
| 99 | $filter=false,$outputstream=false,$no_return=false) { |
| 100 | $aResponse = false; |
| 101 | foreach($aQuery as $tag => $query) { |
| 102 | fputs($imap_stream,$query); |
| 103 | $aResults[$tag] = false; |
| 104 | } |
| 105 | |
| 106 | foreach($aQuery as $tag => $query) { |
| 107 | if (!$aResults[$tag]) { |
| 108 | $aReturnedResponse = sqimap_read_data_list ($imap_stream, $tag, |
| 109 | $handle_errors, $response, $message, $query, |
| 110 | $filter,$outputstream,$no_return); |
| 111 | foreach ($aReturnedResponse as $returned_tag => $aResponse) { |
| 112 | if (!empty($aResponse)) { |
| 113 | $aResults[$returned_tag] = $aResponse[0]; |
| 114 | } else { |
| 115 | $aResults[$returned_tag] = $aResponse; |
| 116 | } |
| 117 | $aServerResponse[$returned_tag] = $response[$returned_tag]; |
| 118 | $aServerMessage[$returned_tag] = $message[$returned_tag]; |
| 119 | } |
| 120 | } |
| 121 | } |
| 122 | return $aResults; |
| 123 | } |
| 124 | |
| 125 | /* |
| 126 | * custom fgets function. gets a line from IMAP |
| 127 | * no matter how big it may be |
| 128 | */ |
| 129 | |
| 130 | function sqimap_fgets($imap_stream) { |
| 131 | $read = ''; |
| 132 | $buffer = 4096; |
| 133 | $results = ''; |
| 134 | $offset = 0; |
| 135 | while (strpos($results, "\r\n", $offset) === false) { |
| 136 | if (!($read = fgets($imap_stream, $buffer))) { |
| 137 | /* this happens in case of an error */ |
| 138 | /* reset $results because it's useless */ |
| 139 | $results = false; |
| 140 | break; |
| 141 | } |
| 142 | if ( $results != '' ) { |
| 143 | $offset = strlen($results) - 1; |
| 144 | } |
| 145 | $results .= $read; |
| 146 | } |
| 147 | return $results; |
| 148 | } |
| 149 | |
| 150 | function sqimap_fread($imap_stream,$iSize,$filter=false, |
| 151 | $outputstream=false, $no_return=false) { |
| 152 | if (!$filter || !$outputstream) { |
| 153 | $iBufferSize = $iSize; |
| 154 | } else { |
| 155 | $iBufferSize = 62400; // multiple of 78 in case of base64 decoding. |
| 156 | } |
| 157 | $iRet = $iSize - $iBufferSize; |
| 158 | $iRetrieved = 0; |
| 159 | $i = 0; |
| 160 | $results = $sReadRem = ''; |
| 161 | $bFinished = $bBufferSizeAdapted = $bBufferIsOk = false; |
| 162 | while (($iRetrieved < ($iSize - $iBufferSize))) { |
| 163 | $sRead = fread($imap_stream,$iBufferSize); |
| 164 | if (!$sRead) { |
| 165 | $results = false; |
| 166 | break; |
| 167 | } |
| 168 | $iRetrieved += $iBufferSize; |
| 169 | if ($filter) { |
| 170 | // in case line-endings do not appear at position 78 we adapt the buffersize so we can base64 decode on the fly |
| 171 | if (!$bBufferSizeAdapted) { |
| 172 | $i = strpos($sRead,"\n"); |
| 173 | if ($i) { |
| 174 | ++$i; |
| 175 | $iFragments = floor($iBufferSize / $i); |
| 176 | $iNewBufferSize = $iFragments * $i; |
| 177 | $iRemainder = $iNewBufferSize + $i - $iBufferSize; |
| 178 | if ($iNewBufferSize == $iBufferSize) { |
| 179 | $bBufferIsOk = true; |
| 180 | $iRemainder = 0; |
| 181 | $iNewBufferSize = $iBufferSize; |
| 182 | $bBufferSizeAdapted = true; |
| 183 | } |
| 184 | if (!$bBufferIsOk && ($iRemainder + $iBufferSize) < $iSize) { |
| 185 | $sReadRem = fread($imap_stream,$iRemainder); |
| 186 | } else if (!$bBufferIsOk) { |
| 187 | $sReadRem = fread($imap_stream,$iSize - $iBufferSize); |
| 188 | $bFinished = true; |
| 189 | } |
| 190 | if (!$sReadRem && $sReadRem !== '') { |
| 191 | $results = false; |
| 192 | break; |
| 193 | } |
| 194 | $iBufferSize = $iNewBufferSize; |
| 195 | $bBufferSizeAdapted = true; |
| 196 | } else { |
| 197 | $sReadRem = fread($imap_stream,$iSize - $iBufferSize); |
| 198 | $bFinished = true; |
| 199 | if (!$sReadRem) { |
| 200 | $results = false; |
| 201 | break; |
| 202 | } |
| 203 | } |
| 204 | $sRead .= $sReadRem; |
| 205 | $iRetrieved += $iRemainder; |
| 206 | unset($sReadRem); |
| 207 | } |
| 208 | $filter($sRead); |
| 209 | } |
| 210 | if ($outputstream) { |
| 211 | if (is_resource($outputstream)) { |
| 212 | fwrite($outputstream,$sRead); |
| 213 | } else if ($outputstream == 'php://stdout') { |
| 214 | echo $sRead; |
| 215 | } |
| 216 | } |
| 217 | if ($no_return) { |
| 218 | $sRead = ''; |
| 219 | } |
| 220 | $results .= $sRead; |
| 221 | } |
| 222 | if (!$results && !$bFinished) { |
| 223 | $sRead = fread($imap_stream,($iSize - ($iRetrieved))); |
| 224 | if ($filter) { |
| 225 | $filter($sRead); |
| 226 | } |
| 227 | if ($outputstream) { |
| 228 | if (is_resource($outputstream)) { |
| 229 | fwrite($outputstream,$sRead); |
| 230 | } else if ($outputstream == 'php://stdout') { // FIXME |
| 231 | echo $sRead; |
| 232 | } |
| 233 | } |
| 234 | if ($no_return) { |
| 235 | $sRead = ''; |
| 236 | } |
| 237 | $results .= $sRead; |
| 238 | } |
| 239 | return $results; |
| 240 | } |
| 241 | |
| 242 | |
| 243 | |
| 244 | /* |
| 245 | * Reads the output from the IMAP stream. If handle_errors is set to true, |
| 246 | * this will also handle all errors that are received. If it is not set, |
| 247 | * the errors will be sent back through $response and $message |
| 248 | */ |
| 249 | |
| 250 | function sqimap_read_data_list ($imap_stream, $tag, $handle_errors, |
| 251 | &$response, &$message, $query = '', |
| 252 | $filter = false, $outputstream = false, $no_return = false) { |
| 253 | global $color, $squirrelmail_language; |
| 254 | $read = ''; |
| 255 | if (!is_array($message)) $message = array(); |
| 256 | if (!is_array($response)) $response = array(); |
| 257 | $resultlist = array(); |
| 258 | $data = array(); |
| 259 | $read = sqimap_fgets($imap_stream); |
| 260 | $i = 0; |
| 261 | while ($read) { |
| 262 | $char = $read{0}; |
| 263 | switch ($char) |
| 264 | { |
| 265 | case '+': |
| 266 | default: |
| 267 | $read = sqimap_fgets($imap_stream); |
| 268 | break; |
| 269 | |
| 270 | case $tag{0}: |
| 271 | { |
| 272 | /* get the command */ |
| 273 | $arg = ''; |
| 274 | $i = strlen($tag)+1; |
| 275 | $s = substr($read,$i); |
| 276 | if (($j = strpos($s,' ')) || ($j = strpos($s,"\n"))) { |
| 277 | $arg = substr($s,0,$j); |
| 278 | } |
| 279 | $found_tag = substr($read,0,$i-1); |
| 280 | if ($arg && $found_tag==$tag) { |
| 281 | switch ($arg) |
| 282 | { |
| 283 | case 'OK': |
| 284 | case 'BAD': |
| 285 | case 'NO': |
| 286 | case 'BYE': |
| 287 | case 'PREAUTH': |
| 288 | $response[$found_tag] = $arg; |
| 289 | $message[$found_tag] = trim(substr($read,$i+strlen($arg))); |
| 290 | if (!empty($data)) { |
| 291 | $resultlist[] = $data; |
| 292 | } |
| 293 | $aResponse[$tag] = $resultlist; |
| 294 | break 3; /* switch switch while */ |
| 295 | default: |
| 296 | /* this shouldn't happen */ |
| 297 | $response[$found_tag] = $arg; |
| 298 | $message[$found_tag] = trim(substr($read,$i+strlen($arg))); |
| 299 | if (!empty($data)) { |
| 300 | $resultlist[] = $data; |
| 301 | } |
| 302 | $aResponse[$found_tag] = $resultlist; |
| 303 | break 3; /* switch switch while */ |
| 304 | } |
| 305 | } elseif($found_tag !== $tag) { |
| 306 | /* not the tag we are looking for, continue */ |
| 307 | if (!empty($data)) { |
| 308 | $resultlist[] = $data; |
| 309 | } |
| 310 | $aResponse[$found_tag] = $resultlist; |
| 311 | $resultlist = $data = array(); |
| 312 | $read = sqimap_fgets($imap_stream); |
| 313 | if ($read === false) { /* error */ |
| 314 | break 3; /* switch switch while */ |
| 315 | } |
| 316 | break; |
| 317 | } |
| 318 | } // end case $tag{0} |
| 319 | |
| 320 | case '*': |
| 321 | { |
| 322 | if (preg_match('/^\*\s\d+\sFETCH/',$read)) { |
| 323 | /* check for literal */ |
| 324 | $s = substr($read,-3); |
| 325 | $fetch_data = array(); |
| 326 | do { /* outer loop, continue until next untagged fetch |
| 327 | or tagged reponse */ |
| 328 | do { /* innerloop for fetching literals. with this loop |
| 329 | we prohibid that literal responses appear in the |
| 330 | outer loop so we can trust the untagged and |
| 331 | tagged info provided by $read */ |
| 332 | if ($s === "}\r\n") { |
| 333 | $j = strrpos($read,'{'); |
| 334 | $iLit = substr($read,$j+1,-3); |
| 335 | $fetch_data[] = $read; |
| 336 | $sLiteral = sqimap_fread($imap_stream,$iLit,$filter,$outputstream,$no_return); |
| 337 | if ($sLiteral === false) { /* error */ |
| 338 | break 4; /* while while switch while */ |
| 339 | } |
| 340 | /* backwards compattibility */ |
| 341 | $aLiteral = explode("\n", $sLiteral); |
| 342 | /* release not neaded data */ |
| 343 | unset($sLiteral); |
| 344 | foreach ($aLiteral as $line) { |
| 345 | $fetch_data[] = $line ."\n"; |
| 346 | } |
| 347 | /* release not neaded data */ |
| 348 | unset($aLiteral); |
| 349 | /* next fgets belongs to this fetch because |
| 350 | we just got the exact literalsize and there |
| 351 | must follow data to complete the response */ |
| 352 | $read = sqimap_fgets($imap_stream); |
| 353 | if ($read === false) { /* error */ |
| 354 | break 4; /* while while switch while */ |
| 355 | } |
| 356 | $fetch_data[] = $read; |
| 357 | } else { |
| 358 | $fetch_data[] = $read; |
| 359 | } |
| 360 | /* retrieve next line and check in the while |
| 361 | statements if it belongs to this fetch response */ |
| 362 | $read = sqimap_fgets($imap_stream); |
| 363 | if ($read === false) { /* error */ |
| 364 | break 4; /* while while switch while */ |
| 365 | } |
| 366 | /* check for next untagged reponse and break */ |
| 367 | if ($read{0} == '*') break 2; |
| 368 | $s = substr($read,-3); |
| 369 | } while ($s === "}\r\n"); |
| 370 | $s = substr($read,-3); |
| 371 | } while ($read{0} !== '*' && |
| 372 | substr($read,0,strlen($tag)) !== $tag); |
| 373 | $resultlist[] = $fetch_data; |
| 374 | /* release not neaded data */ |
| 375 | unset ($fetch_data); |
| 376 | } else { |
| 377 | $s = substr($read,-3); |
| 378 | do { |
| 379 | if ($s === "}\r\n") { |
| 380 | $j = strrpos($read,'{'); |
| 381 | $iLit = substr($read,$j+1,-3); |
| 382 | $data[] = $read; |
| 383 | $sLiteral = fread($imap_stream,$iLit); |
| 384 | if ($sLiteral === false) { /* error */ |
| 385 | $read = false; |
| 386 | break 3; /* while switch while */ |
| 387 | } |
| 388 | $data[] = $sLiteral; |
| 389 | $data[] = sqimap_fgets($imap_stream); |
| 390 | } else { |
| 391 | $data[] = $read; |
| 392 | } |
| 393 | $read = sqimap_fgets($imap_stream); |
| 394 | if ($read === false) { |
| 395 | break 3; /* while switch while */ |
| 396 | } else if ($read{0} == '*') { |
| 397 | break; |
| 398 | } |
| 399 | $s = substr($read,-3); |
| 400 | } while ($s === "}\r\n"); |
| 401 | break 1; |
| 402 | } |
| 403 | break; |
| 404 | } // end case '*' |
| 405 | } // end switch |
| 406 | } // end while |
| 407 | |
| 408 | /* error processing in case $read is false */ |
| 409 | if ($read === false) { |
| 410 | unset($data); |
| 411 | set_up_language($squirrelmail_language); |
| 412 | require_once(SM_PATH . 'functions/display_messages.php'); |
| 413 | $string = "<b><font color=$color[2]>\n" . |
| 414 | _("ERROR : Connection dropped by imap-server.") . |
| 415 | "</b><br>\n" . |
| 416 | _("Query:") . ' '. |
| 417 | htmlspecialchars($query) . '<br>' . "</font><br>\n"; |
| 418 | error_box($string,$color); |
| 419 | exit; |
| 420 | } |
| 421 | |
| 422 | /* Set $resultlist array */ |
| 423 | if (!empty($data)) { |
| 424 | //$resultlist[] = $data; |
| 425 | } |
| 426 | elseif (empty($resultlist)) { |
| 427 | $resultlist[] = array(); |
| 428 | } |
| 429 | |
| 430 | /* Return result or handle errors */ |
| 431 | if ($handle_errors == false) { |
| 432 | return $aResponse; |
| 433 | return( $resultlist ); |
| 434 | } |
| 435 | switch ($response[$tag]) |
| 436 | { |
| 437 | case 'OK': |
| 438 | return $aResponse; |
| 439 | break; |
| 440 | case 'NO': |
| 441 | /* ignore this error from M$ exchange, it is not fatal (aka bug) */ |
| 442 | if (strstr($message[$tag], 'command resulted in') === false) { |
| 443 | set_up_language($squirrelmail_language); |
| 444 | require_once(SM_PATH . 'functions/display_messages.php'); |
| 445 | $string = "<b><font color=$color[2]>\n" . |
| 446 | _("ERROR : Could not complete request.") . |
| 447 | "</b><br>\n" . |
| 448 | _("Query:") . ' ' . |
| 449 | htmlspecialchars($query) . '<br>' . |
| 450 | _("Reason Given: ") . |
| 451 | htmlspecialchars($message[$tag]) . "</font><br>\n"; |
| 452 | error_box($string,$color); |
| 453 | echo '</body></html>'; |
| 454 | exit; |
| 455 | } |
| 456 | break; |
| 457 | case 'BAD': |
| 458 | set_up_language($squirrelmail_language); |
| 459 | require_once(SM_PATH . 'functions/display_messages.php'); |
| 460 | $string = "<b><font color=$color[2]>\n" . |
| 461 | _("ERROR : Bad or malformed request.") . |
| 462 | "</b><br>\n" . |
| 463 | _("Query:") . ' '. |
| 464 | htmlspecialchars($query) . '<br>' . |
| 465 | _("Server responded: ") . |
| 466 | htmlspecialchars($message[$tag]) . "</font><br>\n"; |
| 467 | error_box($string,$color); |
| 468 | echo '</body></html>'; |
| 469 | exit; |
| 470 | case 'BYE': |
| 471 | set_up_language($squirrelmail_language); |
| 472 | require_once(SM_PATH . 'functions/display_messages.php'); |
| 473 | $string = "<b><font color=$color[2]>\n" . |
| 474 | _("ERROR : Imap server closed the connection.") . |
| 475 | "</b><br>\n" . |
| 476 | _("Query:") . ' '. |
| 477 | htmlspecialchars($query) . '<br>' . |
| 478 | _("Server responded: ") . |
| 479 | htmlspecialchars($message[$tag]) . "</font><br>\n"; |
| 480 | error_box($string,$color); |
| 481 | echo '</body></html>'; |
| 482 | exit; |
| 483 | default: |
| 484 | set_up_language($squirrelmail_language); |
| 485 | require_once(SM_PATH . 'functions/display_messages.php'); |
| 486 | $string = "<b><font color=$color[2]>\n" . |
| 487 | _("ERROR : Unknown imap response.") . |
| 488 | "</b><br>\n" . |
| 489 | _("Query:") . ' '. |
| 490 | htmlspecialchars($query) . '<br>' . |
| 491 | _("Server responded: ") . |
| 492 | htmlspecialchars($message[$tag]) . "</font><br>\n"; |
| 493 | error_box($string,$color); |
| 494 | /* the error is displayed but because we don't know the reponse we |
| 495 | return the result anyway */ |
| 496 | return $aResponse; |
| 497 | break; |
| 498 | } |
| 499 | } |
| 500 | |
| 501 | function sqimap_read_data ($imap_stream, $tag_uid, $handle_errors, |
| 502 | &$response, &$message, $query = '', |
| 503 | $filter=false,$outputstream=false,$no_return=false) { |
| 504 | |
| 505 | $tag_uid_a = explode(' ',trim($tag_uid)); |
| 506 | $tag = $tag_uid_a[0]; |
| 507 | |
| 508 | $res = sqimap_read_data_list($imap_stream, $tag, $handle_errors, |
| 509 | $response, $message, $query,$filter,$outputstream,$no_return); |
| 510 | /* sqimap_read_data should be called for one response |
| 511 | but since it just calls sqimap_read_data_list which |
| 512 | handles multiple responses we need to check for that |
| 513 | and merge the $res array IF they are seperated and |
| 514 | IF it was a FETCH response. */ |
| 515 | |
| 516 | // if (isset($res[1]) && is_array($res[1]) && isset($res[1][0]) |
| 517 | // && preg_match('/^\* \d+ FETCH/', $res[1][0])) { |
| 518 | // $result = array(); |
| 519 | // foreach($res as $index=>$value) { |
| 520 | // $result = array_merge($result, $res["$index"]); |
| 521 | // } |
| 522 | // } |
| 523 | if (isset($result)) { |
| 524 | return $result[$tag]; |
| 525 | } |
| 526 | else { |
| 527 | return $res; |
| 528 | } |
| 529 | } |
| 530 | |
| 531 | /* |
| 532 | * Logs the user into the imap server. If $hide is set, no error messages |
| 533 | * will be displayed. This function returns the imap connection handle. |
| 534 | */ |
| 535 | function sqimap_login ($username, $password, $imap_server_address, $imap_port, $hide) { |
| 536 | global $color, $squirrelmail_language, $onetimepad, $use_imap_tls, $imap_auth_mech; |
| 537 | |
| 538 | if (!isset($onetimepad) || empty($onetimepad)) { |
| 539 | sqgetglobalvar('onetimepad' , $onetimepad , SQ_SESSION ); |
| 540 | } |
| 541 | $imap_server_address = sqimap_get_user_server($imap_server_address, $username); |
| 542 | $host=$imap_server_address; |
| 543 | |
| 544 | if (($use_imap_tls == true) and (check_php_version(4,3)) and (extension_loaded('openssl'))) { |
| 545 | /* Use TLS by prefixing "tls://" to the hostname */ |
| 546 | $imap_server_address = 'tls://' . $imap_server_address; |
| 547 | } |
| 548 | |
| 549 | $imap_stream = fsockopen ( $imap_server_address, $imap_port, $error_number, $error_string, 15); |
| 550 | |
| 551 | /* Do some error correction */ |
| 552 | if (!$imap_stream) { |
| 553 | if (!$hide) { |
| 554 | set_up_language($squirrelmail_language, true); |
| 555 | require_once(SM_PATH . 'functions/display_messages.php'); |
| 556 | $string = sprintf (_("Error connecting to IMAP server: %s.") . |
| 557 | "<br>\r\n", $imap_server_address) . |
| 558 | "$error_number : $error_string<br>\r\n"; |
| 559 | logout_error($string,$color); |
| 560 | } |
| 561 | exit; |
| 562 | } |
| 563 | |
| 564 | $server_info = fgets ($imap_stream, 1024); |
| 565 | |
| 566 | /* Decrypt the password */ |
| 567 | $password = OneTimePadDecrypt($password, $onetimepad); |
| 568 | |
| 569 | if (($imap_auth_mech == 'cram-md5') OR ($imap_auth_mech == 'digest-md5')) { |
| 570 | // We're using some sort of authentication OTHER than plain or login |
| 571 | $tag=sqimap_session_id(false); |
| 572 | if ($imap_auth_mech == 'digest-md5') { |
| 573 | $query = $tag . " AUTHENTICATE DIGEST-MD5\r\n"; |
| 574 | } elseif ($imap_auth_mech == 'cram-md5') { |
| 575 | $query = $tag . " AUTHENTICATE CRAM-MD5\r\n"; |
| 576 | } |
| 577 | fputs($imap_stream,$query); |
| 578 | $answer=sqimap_fgets($imap_stream); |
| 579 | // Trim the "+ " off the front |
| 580 | $response=explode(" ",$answer,3); |
| 581 | if ($response[0] == '+') { |
| 582 | // Got a challenge back |
| 583 | $challenge=$response[1]; |
| 584 | if ($imap_auth_mech == 'digest-md5') { |
| 585 | $reply = digest_md5_response($username,$password,$challenge,'imap',$host); |
| 586 | } elseif ($imap_auth_mech == 'cram-md5') { |
| 587 | $reply = cram_md5_response($username,$password,$challenge); |
| 588 | } |
| 589 | fputs($imap_stream,$reply); |
| 590 | $read=sqimap_fgets($imap_stream); |
| 591 | if ($imap_auth_mech == 'digest-md5') { |
| 592 | // DIGEST-MD5 has an extra step.. |
| 593 | if (substr($read,0,1) == '+') { // OK so far.. |
| 594 | fputs($imap_stream,"\r\n"); |
| 595 | $read=sqimap_fgets($imap_stream); |
| 596 | } |
| 597 | } |
| 598 | $results=explode(" ",$read,3); |
| 599 | $response=$results[1]; |
| 600 | $message=$results[2]; |
| 601 | } else { |
| 602 | // Fake the response, so the error trap at the bottom will work |
| 603 | $response="BAD"; |
| 604 | $message='IMAP server does not appear to support the authentication method selected.'; |
| 605 | $message .= ' Please contact your system administrator.'; |
| 606 | } |
| 607 | } elseif ($imap_auth_mech == 'login') { |
| 608 | // Original IMAP login code |
| 609 | $query = 'LOGIN "' . quoteimap($username) . '" "' . quoteimap($password) . '"'; |
| 610 | $read = sqimap_run_command ($imap_stream, $query, false, $response, $message); |
| 611 | } elseif ($imap_auth_mech == 'plain') { |
| 612 | /* Replace this with SASL PLAIN if it ever gets implemented */ |
| 613 | $response="BAD"; |
| 614 | $message='SquirrelMail does not support SASL PLAIN yet. Rerun conf.pl and use login instead.'; |
| 615 | } else { |
| 616 | $response="BAD"; |
| 617 | $message="Internal SquirrelMail error - unknown IMAP authentication method chosen. Please contact the developers."; |
| 618 | } |
| 619 | |
| 620 | /* If the connection was not successful, lets see why */ |
| 621 | if ($response != 'OK') { |
| 622 | if (!$hide) { |
| 623 | if ($response != 'NO') { |
| 624 | /* "BAD" and anything else gets reported here. */ |
| 625 | $message = htmlspecialchars($message); |
| 626 | set_up_language($squirrelmail_language, true); |
| 627 | require_once(SM_PATH . 'functions/display_messages.php'); |
| 628 | if ($response == 'BAD') { |
| 629 | $string = sprintf (_("Bad request: %s")."<br>\r\n", $message); |
| 630 | } else { |
| 631 | $string = sprintf (_("Unknown error: %s") . "<br>\n", $message); |
| 632 | } |
| 633 | if (isset($read) && is_array($read)) { |
| 634 | $string .= '<br>' . _("Read data:") . "<br>\n"; |
| 635 | foreach ($read as $line) { |
| 636 | $string .= htmlspecialchars($line) . "<br>\n"; |
| 637 | } |
| 638 | } |
| 639 | error_box($string,$color); |
| 640 | exit; |
| 641 | } else { |
| 642 | /* |
| 643 | * If the user does not log in with the correct |
| 644 | * username and password it is not possible to get the |
| 645 | * correct locale from the user's preferences. |
| 646 | * Therefore, apply the same hack as on the login |
| 647 | * screen. |
| 648 | * |
| 649 | * $squirrelmail_language is set by a cookie when |
| 650 | * the user selects language and logs out |
| 651 | */ |
| 652 | |
| 653 | set_up_language($squirrelmail_language, true); |
| 654 | include_once(SM_PATH . 'functions/display_messages.php' ); |
| 655 | sqsession_destroy(); |
| 656 | logout_error( _("Unknown user or password incorrect.") ); |
| 657 | exit; |
| 658 | } |
| 659 | } else { |
| 660 | exit; |
| 661 | } |
| 662 | } |
| 663 | return $imap_stream; |
| 664 | } |
| 665 | |
| 666 | /* Simply logs out the IMAP session */ |
| 667 | function sqimap_logout ($imap_stream) { |
| 668 | /* Logout is not valid until the server returns 'BYE' |
| 669 | * If we don't have an imap_ stream we're already logged out */ |
| 670 | if(isset($imap_stream) && $imap_stream) |
| 671 | sqimap_run_command($imap_stream, 'LOGOUT', false, $response, $message); |
| 672 | } |
| 673 | |
| 674 | function sqimap_capability($imap_stream, $capability='') { |
| 675 | global $sqimap_capabilities; |
| 676 | if (!is_array($sqimap_capabilities)) { |
| 677 | $read = sqimap_run_command($imap_stream, 'CAPABILITY', true, $a, $b); |
| 678 | |
| 679 | $c = explode(' ', $read[0]); |
| 680 | for ($i=2; $i < count($c); $i++) { |
| 681 | $cap_list = explode('=', $c[$i]); |
| 682 | if (isset($cap_list[1])) { |
| 683 | $sqimap_capabilities[$cap_list[0]] = $cap_list[1]; |
| 684 | } else { |
| 685 | $sqimap_capabilities[$cap_list[0]] = TRUE; |
| 686 | } |
| 687 | } |
| 688 | } |
| 689 | if ($capability) { |
| 690 | if (isset($sqimap_capabilities[$capability])) { |
| 691 | return $sqimap_capabilities[$capability]; |
| 692 | } else { |
| 693 | return false; |
| 694 | } |
| 695 | } |
| 696 | return $sqimap_capabilities; |
| 697 | } |
| 698 | |
| 699 | /* Returns the delimeter between mailboxes: INBOX/Test, or INBOX.Test */ |
| 700 | function sqimap_get_delimiter ($imap_stream = false) { |
| 701 | global $sqimap_delimiter, $optional_delimiter; |
| 702 | |
| 703 | /* Use configured delimiter if set */ |
| 704 | if((!empty($optional_delimiter)) && $optional_delimiter != 'detect') { |
| 705 | return $optional_delimiter; |
| 706 | } |
| 707 | |
| 708 | /* Do some caching here */ |
| 709 | if (!$sqimap_delimiter) { |
| 710 | if (sqimap_capability($imap_stream, 'NAMESPACE')) { |
| 711 | /* |
| 712 | * According to something that I can't find, this is supposed to work on all systems |
| 713 | * OS: This won't work in Courier IMAP. |
| 714 | * OS: According to rfc2342 response from NAMESPACE command is: |
| 715 | * OS: * NAMESPACE (PERSONAL NAMESPACES) (OTHER_USERS NAMESPACE) (SHARED NAMESPACES) |
| 716 | * OS: We want to lookup all personal NAMESPACES... |
| 717 | */ |
| 718 | $read = sqimap_run_command($imap_stream, 'NAMESPACE', true, $a, $b); |
| 719 | if (eregi('\\* NAMESPACE +(\\( *\\(.+\\) *\\)|NIL) +(\\( *\\(.+\\) *\\)|NIL) +(\\( *\\(.+\\) *\\)|NIL)', $read[0], $data)) { |
| 720 | if (eregi('^\\( *\\((.*)\\) *\\)', $data[1], $data2)) { |
| 721 | $pn = $data2[1]; |
| 722 | } |
| 723 | $pna = explode(')(', $pn); |
| 724 | while (list($k, $v) = each($pna)) { |
| 725 | $lst = explode('"', $v); |
| 726 | if (isset($lst[3])) { |
| 727 | $pn[$lst[1]] = $lst[3]; |
| 728 | } else { |
| 729 | $pn[$lst[1]] = ''; |
| 730 | } |
| 731 | } |
| 732 | } |
| 733 | $sqimap_delimiter = $pn[0]; |
| 734 | } else { |
| 735 | fputs ($imap_stream, ". LIST \"INBOX\" \"\"\r\n"); |
| 736 | $read = sqimap_read_data($imap_stream, '.', true, $a, $b); |
| 737 | $quote_position = strpos ($read[0], '"'); |
| 738 | $sqimap_delimiter = substr ($read[0], $quote_position+1, 1); |
| 739 | } |
| 740 | } |
| 741 | return $sqimap_delimiter; |
| 742 | } |
| 743 | |
| 744 | |
| 745 | /* Gets the number of messages in the current mailbox. */ |
| 746 | function sqimap_get_num_messages ($imap_stream, $mailbox) { |
| 747 | $read_ary = sqimap_run_command ($imap_stream, "EXAMINE \"$mailbox\"", false, $result, $message); |
| 748 | for ($i = 0; $i < count($read_ary); $i++) { |
| 749 | if (ereg("[^ ]+ +([^ ]+) +EXISTS", $read_ary[$i], $regs)) { |
| 750 | return $regs[1]; |
| 751 | } |
| 752 | } |
| 753 | return false; //"BUG! Couldn't get number of messages in $mailbox!"; |
| 754 | } |
| 755 | |
| 756 | |
| 757 | function parseAddress($address, $max=0) { |
| 758 | $aTokens = array(); |
| 759 | $aAddress = array(); |
| 760 | $iCnt = strlen($address); |
| 761 | $aSpecials = array('(' ,'<' ,',' ,';' ,':'); |
| 762 | $aReplace = array(' (',' <',' ,',' ;',' :'); |
| 763 | $address = str_replace($aSpecials,$aReplace,$address); |
| 764 | $i = $iAddrFound = $bGroup = 0; |
| 765 | while ($i < $iCnt) { |
| 766 | $cChar = $address{$i}; |
| 767 | switch($cChar) |
| 768 | { |
| 769 | case '<': |
| 770 | $iEnd = strpos($address,'>',$i+1); |
| 771 | if (!$iEnd) { |
| 772 | $sToken = substr($address,$i); |
| 773 | $i = $iCnt; |
| 774 | } else { |
| 775 | $sToken = substr($address,$i,$iEnd - $i +1); |
| 776 | $i = $iEnd; |
| 777 | } |
| 778 | $sToken = str_replace($aReplace, $aSpecials,$sToken); |
| 779 | $aTokens[] = $sToken; |
| 780 | break; |
| 781 | case '"': |
| 782 | $iEnd = strpos($address,$cChar,$i+1); |
| 783 | if ($iEnd) { |
| 784 | // skip escaped quotes |
| 785 | $prev_char = $address{$iEnd-1}; |
| 786 | while ($prev_char === '\\' && substr($address,$iEnd-2,2) !== '\\\\') { |
| 787 | $iEnd = strpos($address,$cChar,$iEnd+1); |
| 788 | if ($iEnd) { |
| 789 | $prev_char = $address{$iEnd-1}; |
| 790 | } else { |
| 791 | $prev_char = false; |
| 792 | } |
| 793 | } |
| 794 | } |
| 795 | if (!$iEnd) { |
| 796 | $sToken = substr($address,$i); |
| 797 | $i = $iCnt; |
| 798 | } else { |
| 799 | // also remove the surrounding quotes |
| 800 | $sToken = substr($address,$i+1,$iEnd - $i -1); |
| 801 | $i = $iEnd; |
| 802 | } |
| 803 | $sToken = str_replace($aReplace, $aSpecials,$sToken); |
| 804 | if ($sToken) $aTokens[] = $sToken; |
| 805 | break; |
| 806 | case '(': |
| 807 | $iEnd = strpos($address,')',$i); |
| 808 | if (!$iEnd) { |
| 809 | $sToken = substr($address,$i); |
| 810 | $i = $iCnt; |
| 811 | } else { |
| 812 | $sToken = substr($address,$i,$iEnd - $i + 1); |
| 813 | $i = $iEnd; |
| 814 | } |
| 815 | $sToken = str_replace($aReplace, $aSpecials,$sToken); |
| 816 | $aTokens[] = $sToken; |
| 817 | break; |
| 818 | case ',': |
| 819 | ++$iAddrFound; |
| 820 | case ';': |
| 821 | if (!$bGroup) { |
| 822 | ++$iAddrFound; |
| 823 | } else { |
| 824 | $bGroup = false; |
| 825 | } |
| 826 | if ($max && $max == $iAddrFound) { |
| 827 | break 2; |
| 828 | } else { |
| 829 | $aTokens[] = $cChar; |
| 830 | break; |
| 831 | } |
| 832 | case ':': |
| 833 | $bGroup = true; |
| 834 | case ' ': |
| 835 | $aTokens[] = $cChar; |
| 836 | break; |
| 837 | default: |
| 838 | $iEnd = strpos($address,' ',$i+1); |
| 839 | if ($iEnd) { |
| 840 | $sToken = trim(substr($address,$i,$iEnd - $i)); |
| 841 | $i = $iEnd-1; |
| 842 | } else { |
| 843 | $sToken = trim(substr($address,$i)); |
| 844 | $i = $iCnt; |
| 845 | } |
| 846 | if ($sToken) $aTokens[] = $sToken; |
| 847 | } |
| 848 | ++$i; |
| 849 | } |
| 850 | $sPersonal = $sEmail = $sComment = $sGroup = ''; |
| 851 | $aStack = $aComment = array(); |
| 852 | foreach ($aTokens as $sToken) { |
| 853 | if ($max && $max == count($aAddress)) { |
| 854 | return $aAddress; |
| 855 | } |
| 856 | $cChar = $sToken{0}; |
| 857 | switch ($cChar) |
| 858 | { |
| 859 | case '=': |
| 860 | case '"': |
| 861 | case ' ': |
| 862 | $aStack[] = $sToken; |
| 863 | break; |
| 864 | case '(': |
| 865 | $aComment[] = substr($sToken,1,-1); |
| 866 | break; |
| 867 | case ';': |
| 868 | if ($sGroup) { |
| 869 | $sEmail = trim(implode(' ',$aStack)); |
| 870 | $aAddress[] = array($sGroup,$sEmail); |
| 871 | $aStack = $aComment = array(); |
| 872 | $sGroup = ''; |
| 873 | break; |
| 874 | } |
| 875 | case ',': |
| 876 | if (!$sEmail) { |
| 877 | while (count($aStack) && !$sEmail) { |
| 878 | $sEmail = trim(array_pop($aStack)); |
| 879 | } |
| 880 | } |
| 881 | if (count($aStack)) { |
| 882 | $sPersonal = trim(implode('',$aStack)); |
| 883 | } else { |
| 884 | $sPersonal = ''; |
| 885 | } |
| 886 | if (!$sPersonal && count($aComment)) { |
| 887 | $sComment = implode(' ',$aComment); |
| 888 | $sPersonal .= $sComment; |
| 889 | } |
| 890 | $aAddress[] = array($sEmail,$sPersonal); |
| 891 | $sPersonal = $sComment = $sEmail = ''; |
| 892 | $aStack = $aComment = array(); |
| 893 | break; |
| 894 | case ':': |
| 895 | $sGroup = implode(' ',$aStack); break; |
| 896 | $aStack = array(); |
| 897 | break; |
| 898 | case '<': |
| 899 | $sEmail = trim(substr($sToken,1,-1)); |
| 900 | break; |
| 901 | case '>': |
| 902 | /* skip */ |
| 903 | break; |
| 904 | default: $aStack[] = $sToken; break; |
| 905 | } |
| 906 | } |
| 907 | /* now do the action again for the last address */ |
| 908 | if (!$sEmail) { |
| 909 | while (count($aStack) && !$sEmail) { |
| 910 | $sEmail = trim(array_pop($aStack)); |
| 911 | } |
| 912 | } |
| 913 | if (count($aStack)) { |
| 914 | $sPersonal = trim(implode('',$aStack)); |
| 915 | } else { |
| 916 | $sPersonal = ''; |
| 917 | } |
| 918 | if (!$sPersonal && count($aComment)) { |
| 919 | $sComment = implode(' ',$aComment); |
| 920 | $sPersonal .= $sComment; |
| 921 | } |
| 922 | $aAddress[] = array($sEmail,$sPersonal); |
| 923 | return $aAddress; |
| 924 | } |
| 925 | |
| 926 | |
| 927 | |
| 928 | /* |
| 929 | * Returns the number of unseen messages in this folder |
| 930 | */ |
| 931 | function sqimap_unseen_messages ($imap_stream, $mailbox) { |
| 932 | $read_ary = sqimap_run_command ($imap_stream, "STATUS \"$mailbox\" (UNSEEN)", false, $result, $message); |
| 933 | $i = 0; |
| 934 | $regs = array(false, false); |
| 935 | while (isset($read_ary[$i])) { |
| 936 | if (ereg("UNSEEN ([0-9]+)", $read_ary[$i], $regs)) { |
| 937 | break; |
| 938 | } |
| 939 | $i++; |
| 940 | } |
| 941 | return $regs[1]; |
| 942 | } |
| 943 | |
| 944 | /* |
| 945 | * Returns the number of unseen/total messages in this folder |
| 946 | */ |
| 947 | function sqimap_status_messages ($imap_stream, $mailbox) { |
| 948 | $read_ary = sqimap_run_command ($imap_stream, "STATUS \"$mailbox\" (MESSAGES UNSEEN RECENT)", false, $result, $message); |
| 949 | $i = 0; |
| 950 | $messages = $unseen = $recent = false; |
| 951 | $regs = array(false,false); |
| 952 | while (isset($read_ary[$i])) { |
| 953 | if (preg_match('/UNSEEN\s+([0-9]+)/i', $read_ary[$i], $regs)) { |
| 954 | $unseen = $regs[1]; |
| 955 | } |
| 956 | if (preg_match('/MESSAGES\s+([0-9]+)/i', $read_ary[$i], $regs)) { |
| 957 | $messages = $regs[1]; |
| 958 | } |
| 959 | if (preg_match('/RECENT\s+([0-9]+)/i', $read_ary[$i], $regs)) { |
| 960 | $recent = $regs[1]; |
| 961 | } |
| 962 | $i++; |
| 963 | } |
| 964 | return array('MESSAGES' => $messages, 'UNSEEN'=>$unseen, 'RECENT' => $recent); |
| 965 | } |
| 966 | |
| 967 | |
| 968 | /* |
| 969 | * Saves a message to a given folder -- used for saving sent messages |
| 970 | */ |
| 971 | function sqimap_append ($imap_stream, $sent_folder, $length) { |
| 972 | fputs ($imap_stream, sqimap_session_id() . " APPEND \"$sent_folder\" (\\Seen) \{$length}\r\n"); |
| 973 | $tmp = fgets ($imap_stream, 1024); |
| 974 | } |
| 975 | |
| 976 | function sqimap_append_done ($imap_stream, $folder='') { |
| 977 | global $squirrelmail_language, $color; |
| 978 | fputs ($imap_stream, "\r\n"); |
| 979 | $tmp = fgets ($imap_stream, 1024); |
| 980 | if (preg_match("/(.*)(BAD|NO)(.*)$/", $tmp, $regs)) { |
| 981 | set_up_language($squirrelmail_language); |
| 982 | require_once(SM_PATH . 'functions/display_messages.php'); |
| 983 | $reason = $regs[3]; |
| 984 | if ($regs[2] == 'NO') { |
| 985 | $string = "<b><font color=$color[2]>\n" . |
| 986 | _("ERROR : Could not append message to") ." $folder." . |
| 987 | "</b><br>\n" . |
| 988 | _("Server responded: ") . |
| 989 | $reason . "<br>\n"; |
| 990 | if (preg_match("/(.*)(quota)(.*)$/i", $reason, $regs)) { |
| 991 | $string .= _("Solution: ") . |
| 992 | _("Remove unneccessary messages from your folder and start with your Trash folder.") |
| 993 | ."<br>\n"; |
| 994 | } |
| 995 | $string .= "</font>\n"; |
| 996 | error_box($string,$color); |
| 997 | } else { |
| 998 | $string = "<b><font color=$color[2]>\n" . |
| 999 | _("ERROR : Bad or malformed request.") . |
| 1000 | "</b><br>\n" . |
| 1001 | _("Server responded: ") . |
| 1002 | $tmp . "</font><br>\n"; |
| 1003 | error_box($string,$color); |
| 1004 | exit; |
| 1005 | } |
| 1006 | } |
| 1007 | } |
| 1008 | |
| 1009 | function sqimap_get_user_server ($imap_server, $username) { |
| 1010 | if (substr($imap_server, 0, 4) != "map:") { |
| 1011 | return $imap_server; |
| 1012 | } |
| 1013 | $function = substr($imap_server, 4); |
| 1014 | return $function($username); |
| 1015 | } |
| 1016 | |
| 1017 | /* This is an example that gets imapservers from yellowpages (NIS). |
| 1018 | * you can simple put map:map_yp_alias in your $imap_server_address |
| 1019 | * in config.php use your own function instead map_yp_alias to map your |
| 1020 | * LDAP whatever way to find the users imapserver. */ |
| 1021 | |
| 1022 | function map_yp_alias($username) { |
| 1023 | $yp = `ypmatch $username aliases`; |
| 1024 | return chop(substr($yp, strlen($username)+1)); |
| 1025 | } |
| 1026 | |
| 1027 | ?> |