| 1 | <?php |
| 2 | |
| 3 | /** |
| 4 | * Deliver.class.php |
| 5 | * |
| 6 | * This contains all the functions needed to send messages through |
| 7 | * a delivery backend. |
| 8 | * |
| 9 | * @author Marc Groot Koerkamp |
| 10 | * @copyright © 1999-2007 The SquirrelMail Project Team |
| 11 | * @license http://opensource.org/licenses/gpl-license.php GNU Public License |
| 12 | * @version $Id$ |
| 13 | * @package squirrelmail |
| 14 | */ |
| 15 | |
| 16 | /** |
| 17 | * Deliver Class - called to actually deliver the message |
| 18 | * |
| 19 | * This class is called by compose.php and other code that needs |
| 20 | * to send messages. All delivery functionality should be centralized |
| 21 | * in this class. |
| 22 | * |
| 23 | * Do not place UI code in this class, as UI code should be placed in templates |
| 24 | * going forward. |
| 25 | * |
| 26 | * @author Marc Groot Koerkamp |
| 27 | * @package squirrelmail |
| 28 | */ |
| 29 | class Deliver { |
| 30 | |
| 31 | /** |
| 32 | * Most recently calculated Message-ID |
| 33 | * External code should NEVER access this directly! |
| 34 | * @var string |
| 35 | */ |
| 36 | var $message_id; |
| 37 | |
| 38 | /** |
| 39 | * function mail - send the message parts to the SMTP stream |
| 40 | * |
| 41 | * @param Message $message Message object to send |
| 42 | * @param resource $stream Handle to the SMTP stream |
| 43 | * (when FALSE, nothing will be |
| 44 | * written to the stream; this can |
| 45 | * be used to determine the actual |
| 46 | * number of bytes that will be |
| 47 | * written to the stream) |
| 48 | * @param string $reply_id Identifies message being replied to |
| 49 | * (OPTIONAL; caller should ONLY specify |
| 50 | * a value for this when the message |
| 51 | * being sent is a reply) |
| 52 | * @param string $reply_ent_id Identifies message being replied to |
| 53 | * in the case it was an embedded/attached |
| 54 | * message inside another (OPTIONAL; caller |
| 55 | * should ONLY specify a value for this |
| 56 | * when the message being sent is a reply) |
| 57 | * @param mixed $extra Any implementation-specific variables |
| 58 | * can be passed in here and used in |
| 59 | * an overloaded version of this method |
| 60 | * if needed. |
| 61 | * |
| 62 | * @return array An array containing at least these elements in this order: |
| 63 | * - The number of bytes written (or that would have been |
| 64 | * written) to the output stream |
| 65 | * - The message ID (WARNING: if $stream is FALSE, this |
| 66 | * may not be supplied, or may not be accurate) |
| 67 | * |
| 68 | */ |
| 69 | function mail($message, $stream=false, $reply_id=0, $reply_ent_id=0, |
| 70 | $extra=NULL) { |
| 71 | |
| 72 | $rfc822_header = $message->rfc822_header; |
| 73 | if (count($message->entities)) { |
| 74 | $boundary = $this->mimeBoundary(); |
| 75 | $rfc822_header->content_type->properties['boundary']='"'.$boundary.'"'; |
| 76 | } else { |
| 77 | $boundary=''; |
| 78 | } |
| 79 | $raw_length = 0; |
| 80 | |
| 81 | |
| 82 | // calculate reply header if needed |
| 83 | // |
| 84 | if ($reply_id) { |
| 85 | global $imapConnection, $username, $imapServerAddress, |
| 86 | $imapPort, $mailbox; |
| 87 | |
| 88 | if (!is_resource($imapConnection)) |
| 89 | $imapConnection = sqimap_login($username, FALSE, |
| 90 | $imapServerAddress, $imapPort, 0); |
| 91 | |
| 92 | sqimap_mailbox_select($imapConnection, $mailbox); |
| 93 | $reply_message = sqimap_get_message($imapConnection, $reply_id, $mailbox); |
| 94 | |
| 95 | if ($reply_ent_id) { |
| 96 | /* redefine the messsage in case of message/rfc822 */ |
| 97 | $reply_message = $message->getEntity($reply_ent_id); |
| 98 | /* message is an entity which contains the envelope and type0=message |
| 99 | * and type1=rfc822. The actual entities are childs from |
| 100 | * $reply_message->entities[0]. That's where the encoding and is located |
| 101 | */ |
| 102 | |
| 103 | $orig_header = $reply_message->rfc822_header; /* here is the envelope located */ |
| 104 | |
| 105 | } else { |
| 106 | $orig_header = $reply_message->rfc822_header; |
| 107 | } |
| 108 | $message->reply_rfc822_header = $orig_header; |
| 109 | } |
| 110 | |
| 111 | |
| 112 | $reply_rfc822_header = (isset($message->reply_rfc822_header) |
| 113 | ? $message->reply_rfc822_header : ''); |
| 114 | $header = $this->prepareRFC822_Header($rfc822_header, $reply_rfc822_header, $raw_length); |
| 115 | |
| 116 | $this->send_mail($message, $header, $boundary, $stream, $raw_length, $extra); |
| 117 | |
| 118 | return array($raw_length, $this->message_id); |
| 119 | } |
| 120 | |
| 121 | /** |
| 122 | * function send_mail - send the message parts to the IMAP stream |
| 123 | * |
| 124 | * @param Message $message Message object to send |
| 125 | * @param string $header Headers ready to send |
| 126 | * @param string $boundary Message parts boundary |
| 127 | * @param resource $stream Handle to the SMTP stream |
| 128 | * (when FALSE, nothing will be |
| 129 | * written to the stream; this can |
| 130 | * be used to determine the actual |
| 131 | * number of bytes that will be |
| 132 | * written to the stream) |
| 133 | * @param int &$raw_length The number of bytes written (or that |
| 134 | * would have been written) to the |
| 135 | * output stream - NOTE that this is |
| 136 | * passed by reference |
| 137 | * @param mixed $extra Any implementation-specific variables |
| 138 | * can be passed in here and used in |
| 139 | * an overloaded version of this method |
| 140 | * if needed. |
| 141 | * |
| 142 | * @return void |
| 143 | * |
| 144 | */ |
| 145 | function send_mail($message, $header, $boundary, $stream=false, |
| 146 | &$raw_length, $extra=NULL) { |
| 147 | |
| 148 | |
| 149 | if ($stream) { |
| 150 | $this->preWriteToStream($header); |
| 151 | $this->writeToStream($stream, $header); |
| 152 | } |
| 153 | $this->writeBody($message, $stream, $raw_length, $boundary); |
| 154 | } |
| 155 | |
| 156 | /** |
| 157 | * function writeBody - generate and write the mime boundaries around each part to the stream |
| 158 | * |
| 159 | * Recursively formats and writes the MIME boundaries of the $message |
| 160 | * to the output stream. |
| 161 | * |
| 162 | * @param Message $message Message object to transform |
| 163 | * @param resource $stream SMTP output stream |
| 164 | * (when FALSE, nothing will be |
| 165 | * written to the stream; this can |
| 166 | * be used to determine the actual |
| 167 | * number of bytes that will be |
| 168 | * written to the stream) |
| 169 | * @param integer &$length_raw raw length of the message (part) |
| 170 | * as returned by mail fn |
| 171 | * @param string $boundary custom boundary to call, usually for subparts |
| 172 | * |
| 173 | * @return void |
| 174 | */ |
| 175 | function writeBody($message, $stream, &$length_raw, $boundary='') { |
| 176 | // calculate boundary in case of multidimensional mime structures |
| 177 | if ($boundary && $message->entity_id && count($message->entities)) { |
| 178 | if (strpos($boundary,'_part_')) { |
| 179 | $boundary = substr($boundary,0,strpos($boundary,'_part_')); |
| 180 | |
| 181 | // the next four lines use strrev to reverse any nested boundaries |
| 182 | // because RFC 2046 (5.1.1) says that if a line starts with the outer |
| 183 | // boundary string (doesn't matter what the line ends with), that |
| 184 | // can be considered a match for the outer boundary; thus the nested |
| 185 | // boundary needs to be unique from the outer one |
| 186 | // |
| 187 | } else if (strpos($boundary,'_trap_')) { |
| 188 | $boundary = substr(strrev($boundary),0,strpos(strrev($boundary),'_part_')); |
| 189 | } |
| 190 | $boundary_new = strrev($boundary . '_part_'.$message->entity_id); |
| 191 | } else { |
| 192 | $boundary_new = $boundary; |
| 193 | } |
| 194 | if ($boundary && !$message->rfc822_header) { |
| 195 | $s = '--'.$boundary."\r\n"; |
| 196 | $s .= $this->prepareMIME_Header($message, $boundary_new); |
| 197 | $length_raw += strlen($s); |
| 198 | if ($stream) { |
| 199 | $this->preWriteToStream($s); |
| 200 | $this->writeToStream($stream, $s); |
| 201 | } |
| 202 | } |
| 203 | $this->writeBodyPart($message, $stream, $length_raw); |
| 204 | |
| 205 | $last = false; |
| 206 | for ($i=0, $entCount=count($message->entities);$i<$entCount;$i++) { |
| 207 | $msg = $this->writeBody($message->entities[$i], $stream, $length_raw, $boundary_new); |
| 208 | if ($i == $entCount-1) $last = true; |
| 209 | } |
| 210 | if ($boundary && $last) { |
| 211 | $s = "--".$boundary_new."--\r\n\r\n"; |
| 212 | $length_raw += strlen($s); |
| 213 | if ($stream) { |
| 214 | $this->preWriteToStream($s); |
| 215 | $this->writeToStream($stream, $s); |
| 216 | } |
| 217 | } |
| 218 | } |
| 219 | |
| 220 | /** |
| 221 | * function writeBodyPart - write each individual mimepart |
| 222 | * |
| 223 | * Recursively called by WriteBody to write each mime part to the SMTP stream |
| 224 | * |
| 225 | * @param Message $message Message object to transform |
| 226 | * @param resource $stream SMTP output stream |
| 227 | * (when FALSE, nothing will be |
| 228 | * written to the stream; this can |
| 229 | * be used to determine the actual |
| 230 | * number of bytes that will be |
| 231 | * written to the stream) |
| 232 | * @param integer &$length length of the message part |
| 233 | * as returned by mail fn |
| 234 | * |
| 235 | * @return void |
| 236 | */ |
| 237 | function writeBodyPart($message, $stream, &$length) { |
| 238 | if ($message->mime_header) { |
| 239 | $type0 = $message->mime_header->type0; |
| 240 | } else { |
| 241 | $type0 = $message->rfc822_header->content_type->type0; |
| 242 | } |
| 243 | |
| 244 | $body_part_trailing = $last = ''; |
| 245 | switch ($type0) |
| 246 | { |
| 247 | case 'text': |
| 248 | case 'message': |
| 249 | if ($message->body_part) { |
| 250 | $body_part = $message->body_part; |
| 251 | // remove NUL characters |
| 252 | $body_part = str_replace("\0",'',$body_part); |
| 253 | $length += $this->clean_crlf($body_part); |
| 254 | if ($stream) { |
| 255 | $this->preWriteToStream($body_part); |
| 256 | $this->writeToStream($stream, $body_part); |
| 257 | } |
| 258 | $last = $body_part; |
| 259 | } elseif ($message->att_local_name) { |
| 260 | global $username, $attachment_dir; |
| 261 | $hashed_attachment_dir = getHashedDir($username, $attachment_dir); |
| 262 | $filename = $message->att_local_name; |
| 263 | $file = fopen ($hashed_attachment_dir . '/' . $filename, 'rb'); |
| 264 | while ($body_part = fgets($file, 4096)) { |
| 265 | // remove NUL characters |
| 266 | $body_part = str_replace("\0",'',$body_part); |
| 267 | $length += $this->clean_crlf($body_part); |
| 268 | if ($stream) { |
| 269 | $this->preWriteToStream($body_part); |
| 270 | $this->writeToStream($stream, $body_part); |
| 271 | } |
| 272 | $last = $body_part; |
| 273 | } |
| 274 | fclose($file); |
| 275 | } |
| 276 | break; |
| 277 | default: |
| 278 | if ($message->body_part) { |
| 279 | $body_part = $message->body_part; |
| 280 | // remove NUL characters |
| 281 | $body_part = str_replace("\0",'',$body_part); |
| 282 | $length += $this->clean_crlf($body_part); |
| 283 | if ($stream) { |
| 284 | $this->writeToStream($stream, $body_part); |
| 285 | } |
| 286 | } elseif ($message->att_local_name) { |
| 287 | global $username, $attachment_dir; |
| 288 | $hashed_attachment_dir = getHashedDir($username, $attachment_dir); |
| 289 | $filename = $message->att_local_name; |
| 290 | $file = fopen ($hashed_attachment_dir . '/' . $filename, 'rb'); |
| 291 | while ($tmp = fread($file, 570)) { |
| 292 | $body_part = chunk_split(base64_encode($tmp)); |
| 293 | // Up to 4.3.10 chunk_split always appends a newline, |
| 294 | // while in 4.3.11 it doesn't if the string to split |
| 295 | // is shorter than the chunk length. |
| 296 | if( substr($body_part, -1 , 1 ) != "\n" ) |
| 297 | $body_part .= "\n"; |
| 298 | $length += $this->clean_crlf($body_part); |
| 299 | if ($stream) { |
| 300 | $this->writeToStream($stream, $body_part); |
| 301 | } |
| 302 | } |
| 303 | fclose($file); |
| 304 | } |
| 305 | break; |
| 306 | } |
| 307 | $body_part_trailing = ''; |
| 308 | if ($last && substr($last,-1) != "\n") { |
| 309 | $body_part_trailing = "\r\n"; |
| 310 | } |
| 311 | if ($body_part_trailing) { |
| 312 | $length += strlen($body_part_trailing); |
| 313 | if ($stream) { |
| 314 | $this->preWriteToStream($body_part_trailing); |
| 315 | $this->writeToStream($stream, $body_part_trailing); |
| 316 | } |
| 317 | } |
| 318 | } |
| 319 | |
| 320 | /** |
| 321 | * function clean_crlf - change linefeeds and newlines to legal characters |
| 322 | * |
| 323 | * The SMTP format only allows CRLF as line terminators. |
| 324 | * This function replaces illegal teminators with the correct terminator. |
| 325 | * |
| 326 | * @param string &$s string to clean linefeeds on |
| 327 | * |
| 328 | * @return void |
| 329 | */ |
| 330 | function clean_crlf(&$s) { |
| 331 | $s = str_replace("\r\n", "\n", $s); |
| 332 | $s = str_replace("\r", "\n", $s); |
| 333 | $s = str_replace("\n", "\r\n", $s); |
| 334 | return strlen($s); |
| 335 | } |
| 336 | |
| 337 | /** |
| 338 | * function strip_crlf - strip linefeeds and newlines from a string |
| 339 | * |
| 340 | * The SMTP format only allows CRLF as line terminators. |
| 341 | * This function strips all line terminators from the string. |
| 342 | * |
| 343 | * @param string &$s string to clean linefeeds on |
| 344 | * |
| 345 | * @return void |
| 346 | */ |
| 347 | function strip_crlf(&$s) { |
| 348 | $s = str_replace("\r\n ", '', $s); |
| 349 | $s = str_replace("\r", '', $s); |
| 350 | $s = str_replace("\n", '', $s); |
| 351 | } |
| 352 | |
| 353 | /** |
| 354 | * function preWriteToStream - reserved for extended functionality |
| 355 | * |
| 356 | * This function is not yet implemented. |
| 357 | * Reserved for extended functionality. |
| 358 | * |
| 359 | * @param string &$s string to operate on |
| 360 | * |
| 361 | * @return void |
| 362 | */ |
| 363 | function preWriteToStream(&$s) { |
| 364 | } |
| 365 | |
| 366 | /** |
| 367 | * function writeToStream - write data to the SMTP stream |
| 368 | * |
| 369 | * @param resource $stream SMTP output stream |
| 370 | * @param string $data string with data to send to the SMTP stream |
| 371 | * |
| 372 | * @return void |
| 373 | */ |
| 374 | function writeToStream($stream, $data) { |
| 375 | fputs($stream, $data); |
| 376 | } |
| 377 | |
| 378 | /** |
| 379 | * function initStream - reserved for extended functionality |
| 380 | * |
| 381 | * This function is not yet implemented. |
| 382 | * Reserved for extended functionality. |
| 383 | * |
| 384 | * @param Message $message Message object |
| 385 | * @param string $host host name or IP to connect to |
| 386 | * @param string $user username to log into the SMTP server with |
| 387 | * @param string $pass password to log into the SMTP server with |
| 388 | * @param integer $length |
| 389 | * |
| 390 | * @return handle $stream file handle resource to SMTP stream |
| 391 | */ |
| 392 | function initStream($message, $length=0, $host='', $port='', $user='', $pass='') { |
| 393 | return $stream; |
| 394 | } |
| 395 | |
| 396 | /** |
| 397 | * function getBCC - reserved for extended functionality |
| 398 | * |
| 399 | * This function is not yet implemented. |
| 400 | * Reserved for extended functionality. |
| 401 | * |
| 402 | */ |
| 403 | function getBCC() { |
| 404 | return false; |
| 405 | } |
| 406 | |
| 407 | /** |
| 408 | * function prepareMIME_Header - creates the mime header |
| 409 | * |
| 410 | * @param Message $message Message object to act on |
| 411 | * @param string $boundary mime boundary from fn MimeBoundary |
| 412 | * |
| 413 | * @return string $header properly formatted mime header |
| 414 | */ |
| 415 | function prepareMIME_Header($message, $boundary) { |
| 416 | $mime_header = $message->mime_header; |
| 417 | $rn="\r\n"; |
| 418 | $header = array(); |
| 419 | |
| 420 | $contenttype = 'Content-Type: '. $mime_header->type0 .'/'. |
| 421 | $mime_header->type1; |
| 422 | if (count($message->entities)) { |
| 423 | $contenttype .= ';' . 'boundary="'.$boundary.'"'; |
| 424 | } |
| 425 | if (isset($mime_header->parameters['name'])) { |
| 426 | $contenttype .= '; name="'. |
| 427 | encodeHeader($mime_header->parameters['name']). '"'; |
| 428 | } |
| 429 | if (isset($mime_header->parameters['charset'])) { |
| 430 | $charset = $mime_header->parameters['charset']; |
| 431 | $contenttype .= '; charset="'. |
| 432 | encodeHeader($charset). '"'; |
| 433 | } |
| 434 | |
| 435 | $header[] = $contenttype . $rn; |
| 436 | if ($mime_header->description) { |
| 437 | $header[] = 'Content-Description: ' . $mime_header->description . $rn; |
| 438 | } |
| 439 | if ($mime_header->encoding) { |
| 440 | $header[] = 'Content-Transfer-Encoding: ' . $mime_header->encoding . $rn; |
| 441 | } else { |
| 442 | if ($mime_header->type0 == 'text' || $mime_header->type0 == 'message') { |
| 443 | $header[] = 'Content-Transfer-Encoding: 8bit' . $rn; |
| 444 | } else { |
| 445 | $header[] = 'Content-Transfer-Encoding: base64' . $rn; |
| 446 | } |
| 447 | } |
| 448 | if ($mime_header->id) { |
| 449 | $header[] = 'Content-ID: ' . $mime_header->id . $rn; |
| 450 | } |
| 451 | if ($mime_header->disposition) { |
| 452 | $disposition = $mime_header->disposition; |
| 453 | $contentdisp = 'Content-Disposition: ' . $disposition->name; |
| 454 | if ($disposition->getProperty('filename')) { |
| 455 | $contentdisp .= '; filename="'. |
| 456 | encodeHeader($disposition->getProperty('filename')). '"'; |
| 457 | } |
| 458 | $header[] = $contentdisp . $rn; |
| 459 | } |
| 460 | if ($mime_header->md5) { |
| 461 | $header[] = 'Content-MD5: ' . $mime_header->md5 . $rn; |
| 462 | } |
| 463 | if ($mime_header->language) { |
| 464 | $header[] = 'Content-Language: ' . $mime_header->language . $rn; |
| 465 | } |
| 466 | |
| 467 | $cnt = count($header); |
| 468 | $hdr_s = ''; |
| 469 | for ($i = 0 ; $i < $cnt ; $i++) { |
| 470 | $hdr_s .= $this->foldLine($header[$i], 78,str_pad('',4)); |
| 471 | } |
| 472 | $header = $hdr_s; |
| 473 | $header .= $rn; /* One blank line to separate mimeheader and body-entity */ |
| 474 | return $header; |
| 475 | } |
| 476 | |
| 477 | /** |
| 478 | * function prepareRFC822_Header - prepares the RFC822 header string from Rfc822Header object(s) |
| 479 | * |
| 480 | * This function takes the Rfc822Header object(s) and formats them |
| 481 | * into the RFC822Header string to send to the SMTP server as part |
| 482 | * of the SMTP message. |
| 483 | * |
| 484 | * @param Rfc822Header $rfc822_header |
| 485 | * @param Rfc822Header $reply_rfc822_header |
| 486 | * @param integer &$raw_length length of the message |
| 487 | * |
| 488 | * @return string $header |
| 489 | */ |
| 490 | function prepareRFC822_Header($rfc822_header, $reply_rfc822_header, &$raw_length) { |
| 491 | global $domain, $username, $encode_header_key, |
| 492 | $edit_identity, $hide_auth_header; |
| 493 | |
| 494 | /* if server var SERVER_NAME not available, use $domain */ |
| 495 | if(!sqGetGlobalVar('SERVER_NAME', $SERVER_NAME, SQ_SERVER)) { |
| 496 | $SERVER_NAME = $domain; |
| 497 | } |
| 498 | |
| 499 | sqGetGlobalVar('REMOTE_ADDR', $REMOTE_ADDR, SQ_SERVER); |
| 500 | sqGetGlobalVar('REMOTE_PORT', $REMOTE_PORT, SQ_SERVER); |
| 501 | sqGetGlobalVar('REMOTE_HOST', $REMOTE_HOST, SQ_SERVER); |
| 502 | sqGetGlobalVar('HTTP_VIA', $HTTP_VIA, SQ_SERVER); |
| 503 | sqGetGlobalVar('HTTP_X_FORWARDED_FOR', $HTTP_X_FORWARDED_FOR, SQ_SERVER); |
| 504 | |
| 505 | $rn = "\r\n"; |
| 506 | |
| 507 | /* This creates an RFC 822 date */ |
| 508 | $date = date('D, j M Y H:i:s ', time()) . $this->timezone(); |
| 509 | /* Create a message-id */ |
| 510 | $message_id = '<' . (!empty($REMOTE_PORT) ? $REMOTE_PORT . '.' : ''); |
| 511 | //FIXME: if $REMOTE_ADDR is missing, should we skip this if/else block? or perhaps try to generate it with some different kind of info? |
| 512 | if (isset($encode_header_key) && trim($encode_header_key)!='') { |
| 513 | // use encrypted form of remote address |
| 514 | $message_id.= OneTimePadEncrypt($this->ip2hex($REMOTE_ADDR),base64_encode($encode_header_key)); |
| 515 | } else { |
| 516 | $message_id.= $REMOTE_ADDR; |
| 517 | } |
| 518 | $message_id .= '.' . time() . '.squirrel@' . $SERVER_NAME .'>'; |
| 519 | $this->message_id = $message_id; |
| 520 | |
| 521 | /* Make an RFC822 Received: line */ |
| 522 | if (isset($REMOTE_HOST)) { |
| 523 | $received_from = "$REMOTE_HOST ([$REMOTE_ADDR])"; |
| 524 | } else { |
| 525 | $received_from = $REMOTE_ADDR; |
| 526 | } |
| 527 | if (isset($HTTP_VIA) || isset ($HTTP_X_FORWARDED_FOR)) { |
| 528 | if (!isset($HTTP_X_FORWARDED_FOR) || $HTTP_X_FORWARDED_FOR == '') { |
| 529 | $HTTP_X_FORWARDED_FOR = 'unknown'; |
| 530 | } |
| 531 | $received_from .= " (proxying for $HTTP_X_FORWARDED_FOR)"; |
| 532 | } |
| 533 | $header = array(); |
| 534 | |
| 535 | /** |
| 536 | * SquirrelMail header |
| 537 | * |
| 538 | * This Received: header provides information that allows to track |
| 539 | * user and machine that was used to send email. Don't remove it |
| 540 | * unless you understand all possible forging issues or your |
| 541 | * webmail installation does not prevent changes in user's email address. |
| 542 | * See SquirrelMail bug tracker #847107 for more details about it. |
| 543 | * |
| 544 | * Add $hide_squirrelmail_header as a candidate for config_local.php |
| 545 | * to allow completely hiding SquirrelMail participation in message |
| 546 | * processing; This is dangerous, especially if users can modify their |
| 547 | * account information, as it makes mapping a sent message back to the |
| 548 | * original sender almost impossible. |
| 549 | */ |
| 550 | $show_sm_header = ( defined('hide_squirrelmail_header') ? ! hide_squirrelmail_header : 1 ); |
| 551 | |
| 552 | if ( $show_sm_header ) { |
| 553 | if (isset($encode_header_key) && |
| 554 | trim($encode_header_key)!='') { |
| 555 | // use encoded headers, if encryption key is set and not empty |
| 556 | $header[] = 'X-Squirrel-UserHash: '.OneTimePadEncrypt($username,base64_encode($encode_header_key)).$rn; |
| 557 | $header[] = 'X-Squirrel-FromHash: '.OneTimePadEncrypt($this->ip2hex($REMOTE_ADDR),base64_encode($encode_header_key)).$rn; |
| 558 | if (isset($HTTP_X_FORWARDED_FOR)) |
| 559 | $header[] = 'X-Squirrel-ProxyHash:'.OneTimePadEncrypt($this->ip2hex($HTTP_X_FORWARDED_FOR),base64_encode($encode_header_key)).$rn; |
| 560 | } else { |
| 561 | // use default received headers |
| 562 | $header[] = "Received: from $received_from" . $rn; |
| 563 | if ($edit_identity || ! isset($hide_auth_header) || ! $hide_auth_header) |
| 564 | $header[] = " (SquirrelMail authenticated user $username)" . $rn; |
| 565 | $header[] = " by $SERVER_NAME with HTTP;" . $rn; |
| 566 | $header[] = " $date" . $rn; |
| 567 | } |
| 568 | } |
| 569 | |
| 570 | /* Insert the rest of the header fields */ |
| 571 | $header[] = 'Message-ID: '. $message_id . $rn; |
| 572 | if (is_object($reply_rfc822_header) && |
| 573 | isset($reply_rfc822_header->message_id) && |
| 574 | $reply_rfc822_header->message_id) { |
| 575 | $rep_message_id = $reply_rfc822_header->message_id; |
| 576 | // $this->strip_crlf($message_id); |
| 577 | $header[] = 'In-Reply-To: '.$rep_message_id . $rn; |
| 578 | $references = $this->calculate_references($reply_rfc822_header); |
| 579 | $header[] = 'References: '.$references . $rn; |
| 580 | } |
| 581 | $header[] = "Date: $date" . $rn; |
| 582 | $header[] = 'Subject: '.encodeHeader($rfc822_header->subject) . $rn; |
| 583 | $header[] = 'From: '. $rfc822_header->getAddr_s('from',",$rn ",true) . $rn; |
| 584 | |
| 585 | // folding address list [From|To|Cc|Bcc] happens by using ",$rn<space>" |
| 586 | // as delimiter |
| 587 | // Do not use foldLine for that. |
| 588 | |
| 589 | // RFC2822 if from contains more then 1 address |
| 590 | if (count($rfc822_header->from) > 1) { |
| 591 | $header[] = 'Sender: '. $rfc822_header->getAddr_s('sender',',',true) . $rn; |
| 592 | } |
| 593 | if (count($rfc822_header->to)) { |
| 594 | $header[] = 'To: '. $rfc822_header->getAddr_s('to',",$rn ",true) . $rn; |
| 595 | } |
| 596 | if (count($rfc822_header->cc)) { |
| 597 | $header[] = 'Cc: '. $rfc822_header->getAddr_s('cc',",$rn ",true) . $rn; |
| 598 | } |
| 599 | if (count($rfc822_header->reply_to)) { |
| 600 | $header[] = 'Reply-To: '. $rfc822_header->getAddr_s('reply_to',',',true) . $rn; |
| 601 | } |
| 602 | /* Sendmail should return true. Default = false */ |
| 603 | $bcc = $this->getBcc(); |
| 604 | if (count($rfc822_header->bcc)) { |
| 605 | $s = 'Bcc: '. $rfc822_header->getAddr_s('bcc',",$rn ",true) . $rn; |
| 606 | if (!$bcc) { |
| 607 | $raw_length += strlen($s); |
| 608 | } else { |
| 609 | $header[] = $s; |
| 610 | } |
| 611 | } |
| 612 | /* Identify SquirrelMail */ |
| 613 | $header[] = 'User-Agent: SquirrelMail/' . SM_VERSION . $rn; |
| 614 | /* Do the MIME-stuff */ |
| 615 | $header[] = 'MIME-Version: 1.0' . $rn; |
| 616 | $contenttype = 'Content-Type: '. $rfc822_header->content_type->type0 .'/'. |
| 617 | $rfc822_header->content_type->type1; |
| 618 | if (count($rfc822_header->content_type->properties)) { |
| 619 | foreach ($rfc822_header->content_type->properties as $k => $v) { |
| 620 | if ($k && $v) { |
| 621 | $contenttype .= ';' .$k.'='.$v; |
| 622 | } |
| 623 | } |
| 624 | } |
| 625 | $header[] = $contenttype . $rn; |
| 626 | if ($encoding = $rfc822_header->encoding) { |
| 627 | $header[] = 'Content-Transfer-Encoding: ' . $encoding . $rn; |
| 628 | } |
| 629 | if (isset($rfc822_header->dnt) && $rfc822_header->dnt) { |
| 630 | $dnt = $rfc822_header->getAddr_s('dnt'); |
| 631 | /* Pegasus Mail */ |
| 632 | $header[] = 'X-Confirm-Reading-To: '.$dnt. $rn; |
| 633 | /* RFC 2298 */ |
| 634 | $header[] = 'Disposition-Notification-To: '.$dnt. $rn; |
| 635 | } |
| 636 | if ($rfc822_header->priority) { |
| 637 | switch($rfc822_header->priority) |
| 638 | { |
| 639 | case 1: |
| 640 | $header[] = 'X-Priority: 1 (Highest)'.$rn; |
| 641 | $header[] = 'Importance: High'. $rn; break; |
| 642 | case 5: |
| 643 | $header[] = 'X-Priority: 5 (Lowest)'.$rn; |
| 644 | $header[] = 'Importance: Low'. $rn; break; |
| 645 | default: break; |
| 646 | } |
| 647 | } |
| 648 | /* Insert headers from the $more_headers array */ |
| 649 | if(count($rfc822_header->more_headers)) { |
| 650 | reset($rfc822_header->more_headers); |
| 651 | foreach ($rfc822_header->more_headers as $k => $v) { |
| 652 | $header[] = $k.': '.$v .$rn; |
| 653 | } |
| 654 | } |
| 655 | $cnt = count($header); |
| 656 | $hdr_s = ''; |
| 657 | |
| 658 | for ($i = 0 ; $i < $cnt ; $i++) { |
| 659 | $sKey = substr($header[$i],0,strpos($header[$i],':')); |
| 660 | switch ($sKey) |
| 661 | { |
| 662 | case 'Message-ID': |
| 663 | case 'In-Reply_To': |
| 664 | $hdr_s .= $header[$i]; |
| 665 | break; |
| 666 | case 'References': |
| 667 | $sRefs = substr($header[$i],12); |
| 668 | $aRefs = explode(' ',$sRefs); |
| 669 | $sLine = 'References:'; |
| 670 | foreach ($aRefs as $sReference) { |
| 671 | if ( trim($sReference) == '' ) { |
| 672 | /* Don't add spaces. */ |
| 673 | } elseif (strlen($sLine)+strlen($sReference) >76) { |
| 674 | $hdr_s .= $sLine; |
| 675 | $sLine = $rn . ' ' . $sReference; |
| 676 | } else { |
| 677 | $sLine .= ' '. $sReference; |
| 678 | } |
| 679 | } |
| 680 | $hdr_s .= $sLine; |
| 681 | break; |
| 682 | case 'To': |
| 683 | case 'Cc': |
| 684 | case 'Bcc': |
| 685 | case 'From': |
| 686 | $hdr_s .= $header[$i]; |
| 687 | break; |
| 688 | default: $hdr_s .= $this->foldLine($header[$i], 78, str_pad('',4)); break; |
| 689 | } |
| 690 | } |
| 691 | $header = $hdr_s; |
| 692 | $header .= $rn; /* One blank line to separate header and body */ |
| 693 | $raw_length += strlen($header); |
| 694 | return $header; |
| 695 | } |
| 696 | |
| 697 | /** |
| 698 | * function foldLine - for cleanly folding of headerlines |
| 699 | * |
| 700 | * @param string $line |
| 701 | * @param integer $length length to fold the line at |
| 702 | * @param string $pre prefix the line with... |
| 703 | * |
| 704 | * @return string $line folded line with trailing CRLF |
| 705 | */ |
| 706 | function foldLine($line, $length, $pre='') { |
| 707 | $line = substr($line,0, -2); |
| 708 | $length -= 2; /* do not fold between \r and \n */ |
| 709 | $cnt = strlen($line); |
| 710 | if ($cnt > $length) { /* try folding */ |
| 711 | $fold_string = "\r\n " . $pre; |
| 712 | $bFirstFold = false; |
| 713 | $aFoldLine = array(); |
| 714 | while (strlen($line) > $length) { |
| 715 | $fold = false; |
| 716 | /* handle encoded parts */ |
| 717 | if (preg_match('/(=\?([^?]*)\?(Q|B)\?([^?]*)\?=)(\s+|.*)/Ui',$line,$regs)) { |
| 718 | $fold_tmp = $regs[1]; |
| 719 | if (!trim($regs[5])) { |
| 720 | $fold_tmp .= $regs[5]; |
| 721 | } |
| 722 | $iPosEnc = strpos($line,$fold_tmp); |
| 723 | $iLengthEnc = strlen($fold_tmp); |
| 724 | $iPosEncEnd = $iPosEnc+$iLengthEnc; |
| 725 | if ($iPosEnc < $length && (($iPosEncEnd) > $length)) { |
| 726 | $fold = true; |
| 727 | /* fold just before the start of the encoded string */ |
| 728 | if ($iPosEnc) { |
| 729 | $aFoldLine[] = substr($line,0,$iPosEnc); |
| 730 | } |
| 731 | $line = substr($line,$iPosEnc); |
| 732 | if (!$bFirstFold) { |
| 733 | $bFirstFold = true; |
| 734 | $length -= strlen($fold_string); |
| 735 | } |
| 736 | if ($iLengthEnc > $length) { /* place the encoded |
| 737 | string on a separate line and do not fold inside it*/ |
| 738 | /* minimize foldstring */ |
| 739 | $fold_string = "\r\n "; |
| 740 | $aFoldLine[] = substr($line,0,$iLengthEnc); |
| 741 | $line = substr($line,$iLengthEnc); |
| 742 | } |
| 743 | } else if ($iPosEnc < $length) { /* the encoded string fits into the foldlength */ |
| 744 | /*remainder */ |
| 745 | $sLineRem = substr($line,$iPosEncEnd,$length - $iPosEncEnd); |
| 746 | if (preg_match('/^(=\?([^?]*)\?(Q|B)\?([^?]*)\?=)(.*)/Ui',$sLineRem) || !preg_match('/[=,;\s]/',$sLineRem)) { |
| 747 | /*impossible to fold clean in the next part -> fold after the enc string */ |
| 748 | $aFoldLine[] = substr($line,0,$iPosEncEnd); |
| 749 | $line = substr($line,$iPosEncEnd); |
| 750 | $fold = true; |
| 751 | if (!$bFirstFold) { |
| 752 | $bFirstFold = true; |
| 753 | $length -= strlen($fold_string); |
| 754 | } |
| 755 | } |
| 756 | } |
| 757 | } |
| 758 | if (!$fold) { |
| 759 | $line_tmp = substr($line,0,$length); |
| 760 | $iFoldPos = false; |
| 761 | /* try to fold at logical places */ |
| 762 | switch (true) |
| 763 | { |
| 764 | case ($iFoldPos = strrpos($line_tmp,',')): break; |
| 765 | case ($iFoldPos = strrpos($line_tmp,';')): break; |
| 766 | case ($iFoldPos = strrpos($line_tmp,' ')): break; |
| 767 | case ($iFoldPos = strrpos($line_tmp,'=')): break; |
| 768 | default: break; |
| 769 | } |
| 770 | |
| 771 | if (!$iFoldPos) { /* clean folding didn't work */ |
| 772 | $iFoldPos = $length; |
| 773 | } |
| 774 | $aFoldLine[] = substr($line,0,$iFoldPos+1); |
| 775 | $line = substr($line,$iFoldPos+1); |
| 776 | if (!$bFirstFold) { |
| 777 | $bFirstFold = true; |
| 778 | $length -= strlen($fold_string); |
| 779 | } |
| 780 | } |
| 781 | } |
| 782 | /*$reconstruct the line */ |
| 783 | if ($line) { |
| 784 | $aFoldLine[] = $line; |
| 785 | } |
| 786 | $line = implode($fold_string,$aFoldLine); |
| 787 | } |
| 788 | return $line."\r\n"; |
| 789 | } |
| 790 | |
| 791 | /** |
| 792 | * function mimeBoundary - calculates the mime boundary to use |
| 793 | * |
| 794 | * This function will generate a random mime boundary base part |
| 795 | * for the message if the boundary has not already been set. |
| 796 | * |
| 797 | * @return string $mimeBoundaryString random mime boundary string |
| 798 | */ |
| 799 | function mimeBoundary () { |
| 800 | static $mimeBoundaryString; |
| 801 | |
| 802 | if ( !isset( $mimeBoundaryString ) || |
| 803 | $mimeBoundaryString == '') { |
| 804 | $mimeBoundaryString = '----=_' . date( 'YmdHis' ) . '_' . |
| 805 | mt_rand( 10000, 99999 ); |
| 806 | } |
| 807 | return $mimeBoundaryString; |
| 808 | } |
| 809 | |
| 810 | /** |
| 811 | * function timezone - Time offset for correct timezone |
| 812 | * |
| 813 | * @return string $result with timezone and offset |
| 814 | */ |
| 815 | function timezone () { |
| 816 | global $invert_time; |
| 817 | |
| 818 | $diff_second = date('Z'); |
| 819 | if ($invert_time) { |
| 820 | $diff_second = - $diff_second; |
| 821 | } |
| 822 | if ($diff_second > 0) { |
| 823 | $sign = '+'; |
| 824 | } else { |
| 825 | $sign = '-'; |
| 826 | } |
| 827 | $diff_second = abs($diff_second); |
| 828 | $diff_hour = floor ($diff_second / 3600); |
| 829 | $diff_minute = floor (($diff_second-3600*$diff_hour) / 60); |
| 830 | $zonename = '('.strftime('%Z').')'; |
| 831 | $result = sprintf ("%s%02d%02d %s", $sign, $diff_hour, $diff_minute, |
| 832 | $zonename); |
| 833 | return ($result); |
| 834 | } |
| 835 | |
| 836 | /** |
| 837 | * function calculate_references - calculate correct References string |
| 838 | * Adds the current message ID, and makes sure it doesn't grow forever, |
| 839 | * to that extent it drops message-ID's in a smart way until the string |
| 840 | * length is under the recommended value of 1000 ("References: <986>\r\n"). |
| 841 | * It always keeps the first and the last three ID's. |
| 842 | * |
| 843 | * @param Rfc822Header $hdr message header to calculate from |
| 844 | * |
| 845 | * @return string $refer concatenated and trimmed References string |
| 846 | */ |
| 847 | function calculate_references($hdr) { |
| 848 | $aReferences = preg_split('/\s+/', $hdr->references); |
| 849 | $message_id = $hdr->message_id; |
| 850 | $in_reply_to = $hdr->in_reply_to; |
| 851 | |
| 852 | // if References already exists, add the current message ID at the end. |
| 853 | // no References exists; if we know a IRT, add that aswell |
| 854 | if (count($aReferences) == 0 && $in_reply_to) { |
| 855 | $aReferences[] = $in_reply_to; |
| 856 | } |
| 857 | $aReferences[] = $message_id; |
| 858 | |
| 859 | // sanitize the array: trim whitespace, remove dupes |
| 860 | array_walk($aReferences, 'sq_trim_value'); |
| 861 | $aReferences = array_unique($aReferences); |
| 862 | |
| 863 | while ( count($aReferences) > 4 && strlen(implode(' ', $aReferences)) >= 986 ) { |
| 864 | $aReferences = array_merge(array_slice($aReferences,0,1),array_slice($aReferences,2)); |
| 865 | } |
| 866 | return implode(' ', $aReferences); |
| 867 | } |
| 868 | |
| 869 | /** |
| 870 | * Converts ip address to hexadecimal string |
| 871 | * |
| 872 | * Function is used to convert ipv4 and ipv6 addresses to hex strings. |
| 873 | * It removes all delimiter symbols from ip addresses, converts decimal |
| 874 | * ipv4 numbers to hex and pads strings in order to present full length |
| 875 | * address. ipv4 addresses are represented as 8 byte strings, ipv6 addresses |
| 876 | * are represented as 32 byte string. |
| 877 | * |
| 878 | * If function fails to detect address format, it returns unprocessed string. |
| 879 | * @param string $string ip address string |
| 880 | * @return string processed ip address string |
| 881 | * @since 1.5.1 and 1.4.5 |
| 882 | */ |
| 883 | function ip2hex($string) { |
| 884 | if (preg_match("/^(\d+)\.(\d+)\.(\d+)\.(\d+)$/",$string,$match)) { |
| 885 | // ipv4 address |
| 886 | $ret = str_pad(dechex($match[1]),2,'0',STR_PAD_LEFT) |
| 887 | . str_pad(dechex($match[2]),2,'0',STR_PAD_LEFT) |
| 888 | . str_pad(dechex($match[3]),2,'0',STR_PAD_LEFT) |
| 889 | . str_pad(dechex($match[4]),2,'0',STR_PAD_LEFT); |
| 890 | } elseif (preg_match("/^([0-9a-h]+)\:([0-9a-h]+)\:([0-9a-h]+)\:([0-9a-h]+)\:([0-9a-h]+)\:([0-9a-h]+)\:([0-9a-h]+)\:([0-9a-h]+)$/i",$string,$match)) { |
| 891 | // full ipv6 address |
| 892 | $ret = str_pad($match[1],4,'0',STR_PAD_LEFT) |
| 893 | . str_pad($match[2],4,'0',STR_PAD_LEFT) |
| 894 | . str_pad($match[3],4,'0',STR_PAD_LEFT) |
| 895 | . str_pad($match[4],4,'0',STR_PAD_LEFT) |
| 896 | . str_pad($match[5],4,'0',STR_PAD_LEFT) |
| 897 | . str_pad($match[6],4,'0',STR_PAD_LEFT) |
| 898 | . str_pad($match[7],4,'0',STR_PAD_LEFT) |
| 899 | . str_pad($match[8],4,'0',STR_PAD_LEFT); |
| 900 | } elseif (preg_match("/^\:\:([0-9a-h\:]+)$/i",$string,$match)) { |
| 901 | // short ipv6 with all starting symbols nulled |
| 902 | $aAddr=explode(':',$match[1]); |
| 903 | $ret=''; |
| 904 | foreach ($aAddr as $addr) { |
| 905 | $ret.=str_pad($addr,4,'0',STR_PAD_LEFT); |
| 906 | } |
| 907 | $ret=str_pad($ret,32,'0',STR_PAD_LEFT); |
| 908 | } elseif (preg_match("/^([0-9a-h\:]+)::([0-9a-h\:]+)$/i",$string,$match)) { |
| 909 | // short ipv6 with middle part nulled |
| 910 | $aStart=explode(':',$match[1]); |
| 911 | $sStart=''; |
| 912 | foreach($aStart as $addr) { |
| 913 | $sStart.=str_pad($addr,4,'0',STR_PAD_LEFT); |
| 914 | } |
| 915 | $aEnd = explode(':',$match[2]); |
| 916 | $sEnd=''; |
| 917 | foreach($aEnd as $addr) { |
| 918 | $sEnd.=str_pad($addr,4,'0',STR_PAD_LEFT); |
| 919 | } |
| 920 | $ret = $sStart |
| 921 | . str_pad('',(32 - strlen($sStart . $sEnd)),'0',STR_PAD_LEFT) |
| 922 | . $sEnd; |
| 923 | } else { |
| 924 | // unknown addressing |
| 925 | $ret = $string; |
| 926 | } |
| 927 | return $ret; |
| 928 | } |
| 929 | } |