57ae2c61ce
Saved SMTP EHLO response in class parameters. Moved sanitizing of SMTP errors from delivery class to display scripts. Allowed to use configtest.php when client_ip matches server_ip. There is no 1.3.3 version. TLS was introduced in 1.4.0.
1244 lines
47 KiB
PHP
Executable file
1244 lines
47 KiB
PHP
Executable file
<?php
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/**
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* imap_general.php
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*
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* This implements all functions that do general IMAP functions.
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*
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* @copyright © 1999-2006 The SquirrelMail Project Team
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* @license http://opensource.org/licenses/gpl-license.php GNU Public License
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* @version $Id$
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* @package squirrelmail
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* @subpackage imap
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*/
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/** Includes.. */
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require_once(SM_PATH . 'functions/page_header.php');
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require_once(SM_PATH . 'functions/auth.php');
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include_once(SM_PATH . 'functions/rfc822address.php');
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/**
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* Generates a new session ID by incrementing the last one used;
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* this ensures that each command has a unique ID.
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* @param bool $unique_id (since 1.3.0) controls use of unique
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* identifiers/message sequence numbers in IMAP commands. See IMAP
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* rfc 'UID command' chapter.
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* @return string IMAP session id of the form 'A000'.
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* @since 1.2.0
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*/
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function sqimap_session_id($unique_id = FALSE) {
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static $sqimap_session_id = 1;
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if (!$unique_id) {
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return( sprintf("A%03d", $sqimap_session_id++) );
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} else {
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return( sprintf("A%03d", $sqimap_session_id++) . ' UID' );
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}
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}
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/**
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* Both send a command and accept the result from the command.
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* This is to allow proper session number handling.
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* @param stream $imap_stream imap connection resource
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* @param string $query imap command
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* @param boolean $handle_errors see sqimap_retrieve_imap_response()
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* @param array $response
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* @param array $message
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* @param boolean $unique_id (since 1.3.0) see sqimap_session_id().
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* @return mixed returns false on imap error. displays error message
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* if imap stream is not available.
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* @since 1.2.3
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*/
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function sqimap_run_command_list ($imap_stream, $query, $handle_errors, &$response, &$message, $unique_id = false) {
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if ($imap_stream) {
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$sid = sqimap_session_id($unique_id);
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fputs ($imap_stream, $sid . ' ' . $query . "\r\n");
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$tag_uid_a = explode(' ',trim($sid));
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$tag = $tag_uid_a[0];
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$read = sqimap_retrieve_imap_response ($imap_stream, $tag, $handle_errors, $response, $message, $query );
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/* get the response and the message */
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$message = $message[$tag];
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$response = $response[$tag];
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return $read[$tag];
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} else {
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global $squirrelmail_language, $color;
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set_up_language($squirrelmail_language);
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require_once(SM_PATH . 'functions/display_messages.php');
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$string = "<b><font color=\"$color[2]\">\n" .
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_("ERROR: No available IMAP stream.") .
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"</b></font>\n";
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error_box($string,$color);
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return false;
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}
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}
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/**
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* @param stream $imap_stream imap connection resource
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* @param string $query imap command
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* @param boolean $handle_errors see sqimap_retrieve_imap_response()
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* @param array $response empty string, if return = false
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* @param array $message empty string, if return = false
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* @param boolean $unique_id (since 1.3.0) see sqimap_session_id()
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* @param boolean $filter (since 1.4.1 and 1.5.0) see sqimap_fread()
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* @param mixed $outputstream (since 1.4.1 and 1.5.0) see sqimap_fread()
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* @param boolean $no_return (since 1.4.1 and 1.5.0) see sqimap_fread()
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* @return mixed returns false on imap error. displays error message
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* if imap stream is not available.
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* @since 1.2.3
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*/
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function sqimap_run_command ($imap_stream, $query, $handle_errors, &$response,
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&$message, $unique_id = false,$filter=false,
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$outputstream=false,$no_return=false) {
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if ($imap_stream) {
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$sid = sqimap_session_id($unique_id);
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fputs ($imap_stream, $sid . ' ' . $query . "\r\n");
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$tag_uid_a = explode(' ',trim($sid));
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$tag = $tag_uid_a[0];
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$read = sqimap_read_data ($imap_stream, $tag, $handle_errors, $response,
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$message, $query,$filter,$outputstream,$no_return);
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if (empty($read)) { //IMAP server dropped its connection
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$response = '';
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$message = '';
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return false;
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}
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/* retrieve the response and the message */
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$response = $response[$tag];
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$message = $message[$tag];
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if (!empty($read[$tag])) {
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return $read[$tag][0];
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} else {
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return $read[$tag];
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}
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} else {
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global $squirrelmail_language, $color;
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set_up_language($squirrelmail_language);
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require_once(SM_PATH . 'functions/display_messages.php');
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$string = "<b><font color=\"$color[2]\">\n" .
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_("ERROR: No available IMAP stream.") .
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"</b></font>\n";
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error_box($string,$color);
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return false;
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}
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}
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/**
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* @param mixed $new_query
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* @param string $tag
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* @param array $aQuery
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* @param boolean $unique_id see sqimap_session_id()
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* @since 1.5.0
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*/
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function sqimap_prepare_pipelined_query($new_query,&$tag,&$aQuery,$unique_id) {
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$sid = sqimap_session_id($unique_id);
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$tag_uid_a = explode(' ',trim($sid));
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$tag = $tag_uid_a[0];
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$query = $sid . ' '.$new_query."\r\n";
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$aQuery[$tag] = $query;
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}
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/**
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* @param stream $imap_stream imap stream
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* @param array $aQueryList
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* @param boolean $handle_errors
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* @param array $aServerResponse
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* @param array $aServerMessage
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* @param boolean $unique_id see sqimap_session_id()
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* @param boolean $filter see sqimap_fread()
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* @param mixed $outputstream see sqimap_fread()
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* @param boolean $no_return see sqimap_fread()
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* @since 1.5.0
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*/
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function sqimap_run_pipelined_command ($imap_stream, $aQueryList, $handle_errors,
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&$aServerResponse, &$aServerMessage, $unique_id = false,
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$filter=false,$outputstream=false,$no_return=false) {
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$aResponse = false;
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/*
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Do not fire all calls at once to the IMAP server but split the calls up
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in portions of $iChunkSize. If we do not do that I think we misbehave as
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IMAP client or should handle BYE calls if the IMAP server drops the
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connection because the number of queries is to large. This isn't tested
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but a wild guess how it could work in the field.
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After testing it on Exchange 2000 we discovered that a chunksize of 32
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was quicker then when we raised it to 128.
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*/
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$iQueryCount = count($aQueryList);
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$iChunkSize = 32;
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// array_chunk would also do the job but it's supported from php > 4.2
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$aQueryChunks = array();
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$iLoops = floor($iQueryCount / $iChunkSize);
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if ($iLoops * $iChunkSize != $iQueryCount) ++$iLoops;
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if (!function_exists('array_chunk')) { // arraychunk replacement
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reset($aQueryList);
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for($i=0;$i<$iLoops;++$i) {
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for($j=0;$j<$iChunkSize;++$j) {
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$key = key($aQueryList);
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$aTmp[$key] = $aQueryList[$key];
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if (next($aQueryList) === false) break;
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}
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$aQueryChunks[] = $aTmp;
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}
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} else {
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$aQueryChunks = array_chunk($aQueryList,$iChunkSize,true);
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}
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for ($i=0;$i<$iLoops;++$i) {
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$aQuery = $aQueryChunks[$i];
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foreach($aQuery as $tag => $query) {
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fputs($imap_stream,$query);
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$aResults[$tag] = false;
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}
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foreach($aQuery as $tag => $query) {
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if ($aResults[$tag] == false) {
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$aReturnedResponse = sqimap_retrieve_imap_response ($imap_stream, $tag,
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$handle_errors, $response, $message, $query,
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$filter,$outputstream,$no_return);
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foreach ($aReturnedResponse as $returned_tag => $aResponse) {
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if (!empty($aResponse)) {
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$aResults[$returned_tag] = $aResponse[0];
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} else {
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$aResults[$returned_tag] = $aResponse;
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}
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$aServerResponse[$returned_tag] = $response[$returned_tag];
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$aServerMessage[$returned_tag] = $message[$returned_tag];
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}
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}
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}
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}
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return $aResults;
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}
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/**
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* Custom fgets function: gets a line from the IMAP server,
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* no matter how big it may be.
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* @param stream $imap_stream the stream to read from
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* @return string a line
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* @since 1.2.8
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*/
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function sqimap_fgets($imap_stream) {
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$read = '';
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$buffer = 4096;
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$results = '';
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$offset = 0;
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while (strpos($results, "\r\n", $offset) === false) {
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if (!($read = fgets($imap_stream, $buffer))) {
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/* this happens in case of an error */
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/* reset $results because it's useless */
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$results = false;
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break;
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}
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if ( $results != '' ) {
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$offset = strlen($results) - 1;
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}
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$results .= $read;
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}
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return $results;
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}
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/**
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* @param stream $imap_stream
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* @param integer $iSize
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* @param boolean $filter
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* @param mixed $outputstream stream or 'php://stdout' string
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* @param boolean $no_return controls data returned by function
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* @return string
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* @since 1.4.1
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*/
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function sqimap_fread($imap_stream,$iSize,$filter=false,
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$outputstream=false, $no_return=false) {
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if (!$filter || !$outputstream) {
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$iBufferSize = $iSize;
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} else {
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// see php bug 24033. They changed fread behaviour %$^&$%
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$iBufferSize = 7800; // multiple of 78 in case of base64 decoding.
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}
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if ($iSize < $iBufferSize) {
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$iBufferSize = $iSize;
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}
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$iRetrieved = 0;
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$results = '';
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$sRead = $sReadRem = '';
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// NB: fread can also stop at end of a packet on sockets.
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while ($iRetrieved < $iSize) {
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$sRead = fread($imap_stream,$iBufferSize);
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$iLength = strlen($sRead);
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$iRetrieved += $iLength ;
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$iRemaining = $iSize - $iRetrieved;
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if ($iRemaining < $iBufferSize) {
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$iBufferSize = $iRemaining;
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}
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if ($sRead == '') {
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$results = false;
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break;
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}
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if ($sReadRem != '') {
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$sRead = $sReadRem . $sRead;
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$sReadRem = '';
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}
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if ($filter && $sRead != '') {
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// in case the filter is base64 decoding we return a remainder
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$sReadRem = $filter($sRead);
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}
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if ($outputstream && $sRead != '') {
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if (is_resource($outputstream)) {
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fwrite($outputstream,$sRead);
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} else if ($outputstream == 'php://stdout') {
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echo $sRead;
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}
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}
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if ($no_return) {
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$sRead = '';
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} else {
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$results .= $sRead;
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}
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}
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return $results;
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}
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/**
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* Obsolete function, inform plugins that use it
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* @param stream $imap_stream
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* @param string $tag
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* @param boolean $handle_errors
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* @param array $response
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* @param array $message
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* @param string $query
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* @since 1.1.3
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* @deprecated (since 1.5.0) use sqimap_run_command or sqimap_run_command_list instead
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*/
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function sqimap_read_data_list($imap_stream, $tag, $handle_errors,
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&$response, &$message, $query = '') {
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global $color, $squirrelmail_language;
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set_up_language($squirrelmail_language);
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require_once(SM_PATH . 'functions/display_messages.php');
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$string = "<b><font color=\"$color[2]\">\n" .
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_("ERROR: Bad function call.") .
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"</b><br />\n" .
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_("Reason:") . ' '.
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'There is a plugin installed which make use of the <br />' .
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'SquirrelMail internal function sqimap_read_data_list.<br />'.
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'Please adapt the installed plugin and let it use<br />'.
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'sqimap_run_command or sqimap_run_command_list instead<br /><br />'.
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'The following query was issued:<br />'.
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htmlspecialchars($query) . '<br />' . "</font><br />\n";
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error_box($string,$color);
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echo '</body></html>';
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exit;
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}
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/**
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* Function to display an error related to an IMAP query.
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* @param string title the caption of the error box
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* @param string query the query that went wrong
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* @param string message_title optional message title
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* @param string message optional error message
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* @param string $link an optional link to try again
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* @return void
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* @since 1.5.0
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*/
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function sqimap_error_box($title, $query = '', $message_title = '', $message = '', $link = '')
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{
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global $color, $squirrelmail_language;
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set_up_language($squirrelmail_language);
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require_once(SM_PATH . 'functions/display_messages.php');
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$string = "<font color=\"$color[2]\"><b>\n" . $title . "</b><br />\n";
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$cmd = explode(' ',$query);
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$cmd= strtolower($cmd[0]);
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if ($query != '' && $cmd != 'login')
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$string .= _("Query:") . ' ' . htmlspecialchars($query) . '<br />';
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if ($message_title != '')
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$string .= $message_title;
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if ($message != '')
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$string .= htmlspecialchars($message);
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$string .= "</font><br />\n";
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if ($link != '')
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$string .= $link;
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error_box($string,$color);
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}
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/**
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* Reads the output from the IMAP stream. If handle_errors is set to true,
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* this will also handle all errors that are received. If it is not set,
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* the errors will be sent back through $response and $message.
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* @param stream $imap_stream imap stream
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* @param string $tag
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* @param boolean $handle_errors handle errors internally or send them in $response and $message.
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* @param array $response
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* @param array $message
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* @param string $query command that can be printed if something fails
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* @param boolean $filter see sqimap_fread()
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* @param mixed $outputstream see sqimap_fread()
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* @param boolean $no_return see sqimap_fread()
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* @since 1.5.0
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*/
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function sqimap_retrieve_imap_response($imap_stream, $tag, $handle_errors,
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&$response, &$message, $query = '',
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$filter = false, $outputstream = false, $no_return = false) {
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global $color, $squirrelmail_language;
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$read = '';
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if (!is_array($message)) $message = array();
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if (!is_array($response)) $response = array();
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$aResponse = '';
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$resultlist = array();
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$data = array();
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$read = sqimap_fgets($imap_stream);
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$i = 0;
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while ($read) {
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$char = $read{0};
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switch ($char)
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{
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case '+':
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default:
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$read = sqimap_fgets($imap_stream);
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break;
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case $tag{0}:
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{
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/* get the command */
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$arg = '';
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$i = strlen($tag)+1;
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$s = substr($read,$i);
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if (($j = strpos($s,' ')) || ($j = strpos($s,"\n"))) {
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$arg = substr($s,0,$j);
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}
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$found_tag = substr($read,0,$i-1);
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if ($found_tag) {
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switch ($arg)
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{
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case 'OK':
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case 'BAD':
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case 'NO':
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case 'BYE':
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case 'PREAUTH':
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$response[$found_tag] = $arg;
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$message[$found_tag] = trim(substr($read,$i+strlen($arg)));
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if (!empty($data)) {
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$resultlist[] = $data;
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}
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$aResponse[$found_tag] = $resultlist;
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$data = $resultlist = array();
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if ($found_tag == $tag) {
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break 3; /* switch switch while */
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}
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break;
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default:
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/* this shouldn't happen */
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$response[$found_tag] = $arg;
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$message[$found_tag] = trim(substr($read,$i+strlen($arg)));
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if (!empty($data)) {
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$resultlist[] = $data;
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}
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$aResponse[$found_tag] = $resultlist;
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$data = $resultlist = array();
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if ($found_tag == $tag) {
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break 3; /* switch switch while */
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}
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}
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}
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$read = sqimap_fgets($imap_stream);
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if ($read === false) { /* error */
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break 2; /* switch while */
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}
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break;
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} // end case $tag{0}
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case '*':
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{
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if (preg_match('/^\*\s\d+\sFETCH/',$read)) {
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/* check for literal */
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$s = substr($read,-3);
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$fetch_data = array();
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do { /* outer loop, continue until next untagged fetch
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or tagged reponse */
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do { /* innerloop for fetching literals. with this loop
|
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we prohibid that literal responses appear in the
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outer loop so we can trust the untagged and
|
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tagged info provided by $read */
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if ($s === "}\r\n") {
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$j = strrpos($read,'{');
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$iLit = substr($read,$j+1,-3);
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$fetch_data[] = $read;
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$sLiteral = sqimap_fread($imap_stream,$iLit,$filter,$outputstream,$no_return);
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if ($sLiteral === false) { /* error */
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break 4; /* while while switch while */
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}
|
|
/* backwards compattibility */
|
|
$aLiteral = explode("\n", $sLiteral);
|
|
/* release not neaded data */
|
|
unset($sLiteral);
|
|
foreach ($aLiteral as $line) {
|
|
$fetch_data[] = $line ."\n";
|
|
}
|
|
/* release not neaded data */
|
|
unset($aLiteral);
|
|
/* next fgets belongs to this fetch because
|
|
we just got the exact literalsize and there
|
|
must follow data to complete the response */
|
|
$read = sqimap_fgets($imap_stream);
|
|
if ($read === false) { /* error */
|
|
break 4; /* while while switch while */
|
|
}
|
|
$fetch_data[] = $read;
|
|
} else {
|
|
$fetch_data[] = $read;
|
|
}
|
|
/* retrieve next line and check in the while
|
|
statements if it belongs to this fetch response */
|
|
$read = sqimap_fgets($imap_stream);
|
|
if ($read === false) { /* error */
|
|
break 4; /* while while switch while */
|
|
}
|
|
/* check for next untagged reponse and break */
|
|
if ($read{0} == '*') break 2;
|
|
$s = substr($read,-3);
|
|
} while ($s === "}\r\n");
|
|
$s = substr($read,-3);
|
|
} while ($read{0} !== '*' &&
|
|
substr($read,0,strlen($tag)) !== $tag);
|
|
$resultlist[] = $fetch_data;
|
|
/* release not neaded data */
|
|
unset ($fetch_data);
|
|
} else {
|
|
$s = substr($read,-3);
|
|
do {
|
|
if ($s === "}\r\n") {
|
|
$j = strrpos($read,'{');
|
|
$iLit = substr($read,$j+1,-3);
|
|
$data[] = $read;
|
|
$sLiteral = fread($imap_stream,$iLit);
|
|
if ($sLiteral === false) { /* error */
|
|
$read = false;
|
|
break 3; /* while switch while */
|
|
}
|
|
$data[] = $sLiteral;
|
|
$data[] = sqimap_fgets($imap_stream);
|
|
} else {
|
|
$data[] = $read;
|
|
}
|
|
$read = sqimap_fgets($imap_stream);
|
|
if ($read === false) {
|
|
break 3; /* while switch while */
|
|
} else if ($read{0} == '*') {
|
|
break;
|
|
}
|
|
$s = substr($read,-3);
|
|
} while ($s === "}\r\n");
|
|
break 1;
|
|
}
|
|
break;
|
|
} // end case '*'
|
|
} // end switch
|
|
} // end while
|
|
|
|
/* error processing in case $read is false */
|
|
if ($read === false) {
|
|
// try to retrieve an untagged bye respons from the results
|
|
$sResponse = array_pop($data);
|
|
if ($sResponse !== NULL && strpos($sResponse,'* BYE') !== false) {
|
|
if (!$handle_errors) {
|
|
$query = '';
|
|
}
|
|
sqimap_error_box(_("ERROR: IMAP server closed the connection."), $query, _("Server responded:"),$sResponse);
|
|
echo '</body></html>';
|
|
exit;
|
|
} else if ($handle_errors) {
|
|
unset($data);
|
|
sqimap_error_box(_("ERROR: Connection dropped by IMAP server."), $query);
|
|
exit;
|
|
}
|
|
}
|
|
|
|
/* Set $resultlist array */
|
|
if (!empty($data)) {
|
|
//$resultlist[] = $data;
|
|
}
|
|
elseif (empty($resultlist)) {
|
|
$resultlist[] = array();
|
|
}
|
|
|
|
/* Return result or handle errors */
|
|
if ($handle_errors == false) {
|
|
return $aResponse;
|
|
}
|
|
switch ($response[$tag]) {
|
|
case 'OK':
|
|
return $aResponse;
|
|
break;
|
|
case 'NO':
|
|
/* ignore this error from M$ exchange, it is not fatal (aka bug) */
|
|
if (strstr($message[$tag], 'command resulted in') === false) {
|
|
sqimap_error_box(_("ERROR: Could not complete request."), $query, _("Reason Given:") . ' ', $message[$tag]);
|
|
echo '</body></html>';
|
|
exit;
|
|
}
|
|
break;
|
|
case 'BAD':
|
|
sqimap_error_box(_("ERROR: Bad or malformed request."), $query, _("Server responded:") . ' ', $message[$tag]);
|
|
echo '</body></html>';
|
|
exit;
|
|
case 'BYE':
|
|
sqimap_error_box(_("ERROR: IMAP server closed the connection."), $query, _("Server responded:") . ' ', $message[$tag]);
|
|
echo '</body></html>';
|
|
exit;
|
|
default:
|
|
sqimap_error_box(_("ERROR: Unknown IMAP response."), $query, _("Server responded:") . ' ', $message[$tag]);
|
|
/* the error is displayed but because we don't know the reponse we
|
|
return the result anyway */
|
|
return $aResponse;
|
|
break;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @param stream $imap_stream imap string
|
|
* @param string $tag_uid
|
|
* @param boolean $handle_errors
|
|
* @param array $response
|
|
* @param array $message
|
|
* @param string $query (since 1.2.5)
|
|
* @param boolean $filter (since 1.4.1) see sqimap_fread()
|
|
* @param mixed $outputstream (since 1.4.1) see sqimap_fread()
|
|
* @param boolean $no_return (since 1.4.1) see sqimap_fread()
|
|
*/
|
|
function sqimap_read_data ($imap_stream, $tag_uid, $handle_errors,
|
|
&$response, &$message, $query = '',
|
|
$filter=false,$outputstream=false,$no_return=false) {
|
|
|
|
$tag_uid_a = explode(' ',trim($tag_uid));
|
|
$tag = $tag_uid_a[0];
|
|
|
|
$res = sqimap_retrieve_imap_response($imap_stream, $tag, $handle_errors,
|
|
$response, $message, $query,$filter,$outputstream,$no_return);
|
|
return $res;
|
|
}
|
|
|
|
/**
|
|
* Connects to the IMAP server and returns a resource identifier for use with
|
|
* the other SquirrelMail IMAP functions. Does NOT login!
|
|
* @param string server hostname of IMAP server
|
|
* @param int port port number to connect to
|
|
* @param integer $tls whether to use plain text(0), TLS(1) or STARTTLS(2) when connecting.
|
|
* Argument was boolean before 1.5.1.
|
|
* @return imap-stream resource identifier
|
|
* @since 1.5.0 (usable only in 1.5.1 or later)
|
|
*/
|
|
function sqimap_create_stream($server,$port,$tls=0) {
|
|
global $squirrelmail_language;
|
|
|
|
// FIXME: ipv6 address support
|
|
|
|
if ($tls == 1) {
|
|
if ((check_php_version(4,3)) and (extension_loaded('openssl'))) {
|
|
/* Use TLS by prefixing "tls://" to the hostname */
|
|
$server = 'tls://' . $server;
|
|
} else {
|
|
require_once(SM_PATH . 'functions/display_messages.php');
|
|
logout_error( sprintf(_("Error connecting to IMAP server: %s."), $server).
|
|
'<br />'.
|
|
_("TLS is enabled, but this version of PHP does not support TLS sockets, or is missing the openssl extension.").
|
|
'<br /><br />'.
|
|
_("Please contact your system administrator and report this error."),
|
|
sprintf(_("Error connecting to IMAP server: %s."), $server));
|
|
}
|
|
}
|
|
|
|
$imap_stream = @fsockopen($server, $port, $error_number, $error_string, 15);
|
|
|
|
/* Do some error correction */
|
|
if (!$imap_stream) {
|
|
set_up_language($squirrelmail_language, true);
|
|
require_once(SM_PATH . 'functions/display_messages.php');
|
|
logout_error( sprintf(_("Error connecting to IMAP server: %s."), $server).
|
|
"<br />\r\n$error_number : $error_string<br />\r\n",
|
|
sprintf(_("Error connecting to IMAP server: %s."), $server) );
|
|
exit;
|
|
}
|
|
$server_info = fgets ($imap_stream, 1024);
|
|
|
|
/**
|
|
* Implementing IMAP STARTTLS (rfc2595) in php 5.1.0+
|
|
* http://www.php.net/stream-socket-enable-crypto
|
|
*/
|
|
if ($tls == 2) {
|
|
if (function_exists('stream_socket_enable_crypto')) {
|
|
// check starttls capability, don't use cached capability version
|
|
if (! sqimap_capability($imap_stream, 'STARTTLS', false)) {
|
|
// imap server does not declare starttls support
|
|
sqimap_error_box(sprintf(_("Error connecting to IMAP server: %s."), $server),
|
|
'','',
|
|
_("IMAP STARTTLS is enabled in SquirrelMail configuration, but used IMAP server does not support STARTTLS."));
|
|
exit;
|
|
}
|
|
|
|
// issue starttls command and check response
|
|
sqimap_run_command($imap_stream, 'STARTTLS', false, $starttls_response, $starttls_message);
|
|
// check response
|
|
if ($starttls_response!='OK') {
|
|
// starttls command failed
|
|
sqimap_error_box(sprintf(_("Error connecting to IMAP server: %s."), $server),
|
|
'STARTTLS',
|
|
_("Server replied: "),
|
|
$starttls_message);
|
|
exit();
|
|
}
|
|
|
|
// start crypto on connection. suppress function errors.
|
|
if (@stream_socket_enable_crypto($imap_stream,true,STREAM_CRYPTO_METHOD_TLS_CLIENT)) {
|
|
// starttls was successful
|
|
|
|
/**
|
|
* RFC 2595 requires to discard CAPABILITY information after successful
|
|
* STARTTLS command. We don't follow RFC, because SquirrelMail stores CAPABILITY
|
|
* information only after successful login (src/redirect.php) and cached information
|
|
* is used only in other php script connections after successful STARTTLS. If script
|
|
* issues sqimap_capability() call before sqimap_login() and wants to get initial
|
|
* capability response, script should set third sqimap_capability() argument to false.
|
|
*/
|
|
//sqsession_unregister('sqimap_capabilities');
|
|
} else {
|
|
/**
|
|
* stream_socket_enable_crypto() call failed. Possible issues:
|
|
* - broken ssl certificate (uw drops connection, error is in syslog mail facility)
|
|
* - some ssl error (can reproduce with STREAM_CRYPTO_METHOD_SSLv3_CLIENT, PHP E_WARNING
|
|
* suppressed in stream_socket_enable_crypto() call)
|
|
*/
|
|
sqimap_error_box(sprintf(_("Error connecting to IMAP server: %s."), $server),
|
|
'','',
|
|
_("Unable to start TLS."));
|
|
/**
|
|
* Bug: stream_socket_enable_crypto() does not register SSL errors in
|
|
* openssl_error_string() or stream notification wrapper and displays
|
|
* them in E_WARNING level message. It is impossible to retrieve error
|
|
* message without own error handler.
|
|
*/
|
|
exit;
|
|
}
|
|
} else {
|
|
// php install does not support stream_socket_enable_crypto() function
|
|
sqimap_error_box(sprintf(_("Error connecting to IMAP server: %s."), $server),
|
|
'','',
|
|
_("IMAP STARTTLS is enabled in SquirrelMail configuration, but used PHP version does not support functions that allow to enable encryption on open socket."));
|
|
exit;
|
|
}
|
|
}
|
|
return $imap_stream;
|
|
}
|
|
|
|
/**
|
|
* Logs the user into the IMAP server. If $hide is set, no error messages
|
|
* will be displayed. This function returns the IMAP connection handle.
|
|
* @param string $username user name
|
|
* @param string $password encrypted password
|
|
* @param string $imap_server_address address of imap server
|
|
* @param integer $imap_port port of imap server
|
|
* @param boolean $hide controls display connection errors
|
|
* @return stream
|
|
*/
|
|
function sqimap_login ($username, $password, $imap_server_address, $imap_port, $hide) {
|
|
global $color, $squirrelmail_language, $onetimepad, $use_imap_tls,
|
|
$imap_auth_mech, $sqimap_capabilities;
|
|
|
|
if (!isset($onetimepad) || empty($onetimepad)) {
|
|
sqgetglobalvar('onetimepad' , $onetimepad , SQ_SESSION );
|
|
}
|
|
if (!isset($sqimap_capabilities)) {
|
|
sqgetglobalvar('sqimap_capabilities' , $capability , SQ_SESSION );
|
|
}
|
|
|
|
$host = $imap_server_address;
|
|
$imap_server_address = sqimap_get_user_server($imap_server_address, $username);
|
|
|
|
$imap_stream = sqimap_create_stream($imap_server_address,$imap_port,$use_imap_tls);
|
|
|
|
/* Decrypt the password */
|
|
$password = OneTimePadDecrypt($password, $onetimepad);
|
|
|
|
if (($imap_auth_mech == 'cram-md5') OR ($imap_auth_mech == 'digest-md5')) {
|
|
// We're using some sort of authentication OTHER than plain or login
|
|
$tag=sqimap_session_id(false);
|
|
if ($imap_auth_mech == 'digest-md5') {
|
|
$query = $tag . " AUTHENTICATE DIGEST-MD5\r\n";
|
|
} elseif ($imap_auth_mech == 'cram-md5') {
|
|
$query = $tag . " AUTHENTICATE CRAM-MD5\r\n";
|
|
}
|
|
fputs($imap_stream,$query);
|
|
$answer=sqimap_fgets($imap_stream);
|
|
// Trim the "+ " off the front
|
|
$response=explode(" ",$answer,3);
|
|
if ($response[0] == '+') {
|
|
// Got a challenge back
|
|
$challenge=$response[1];
|
|
if ($imap_auth_mech == 'digest-md5') {
|
|
$reply = digest_md5_response($username,$password,$challenge,'imap',$host);
|
|
} elseif ($imap_auth_mech == 'cram-md5') {
|
|
$reply = cram_md5_response($username,$password,$challenge);
|
|
}
|
|
fputs($imap_stream,$reply);
|
|
$read=sqimap_fgets($imap_stream);
|
|
if ($imap_auth_mech == 'digest-md5') {
|
|
// DIGEST-MD5 has an extra step..
|
|
if (substr($read,0,1) == '+') { // OK so far..
|
|
fputs($imap_stream,"\r\n");
|
|
$read=sqimap_fgets($imap_stream);
|
|
}
|
|
}
|
|
$results=explode(" ",$read,3);
|
|
$response=$results[1];
|
|
$message=$results[2];
|
|
} else {
|
|
// Fake the response, so the error trap at the bottom will work
|
|
$response="BAD";
|
|
$message='IMAP server does not appear to support the authentication method selected.';
|
|
$message .= ' Please contact your system administrator.';
|
|
}
|
|
} elseif ($imap_auth_mech == 'login') {
|
|
// Original IMAP login code
|
|
$query = 'LOGIN "' . quoteimap($username) . '" "' . quoteimap($password) . '"';
|
|
$read = sqimap_run_command ($imap_stream, $query, false, $response, $message);
|
|
} elseif ($imap_auth_mech == 'plain') {
|
|
/***
|
|
* SASL PLAIN
|
|
*
|
|
* RFC 2595 Chapter 6
|
|
*
|
|
* The mechanism consists of a single message from the client to the
|
|
* server. The client sends the authorization identity (identity to
|
|
* login as), followed by a US-ASCII NUL character, followed by the
|
|
* authentication identity (identity whose password will be used),
|
|
* followed by a US-ASCII NUL character, followed by the clear-text
|
|
* password. The client may leave the authorization identity empty to
|
|
* indicate that it is the same as the authentication identity.
|
|
*
|
|
**/
|
|
$tag=sqimap_session_id(false);
|
|
$sasl = (isset($capability['SASL-IR']) && $capability['SASL-IR']) ? true : false;
|
|
$auth = base64_encode("$username\0$username\0$password");
|
|
if ($sasl) {
|
|
// IMAP Extension for SASL Initial Client Response
|
|
// <draft-siemborski-imap-sasl-initial-response-01b.txt>
|
|
$query = $tag . " AUTHENTICATE PLAIN $auth\r\n";
|
|
fputs($imap_stream, $query);
|
|
$read = sqimap_fgets($imap_stream);
|
|
} else {
|
|
$query = $tag . " AUTHENTICATE PLAIN\r\n";
|
|
fputs($imap_stream, $query);
|
|
$read=sqimap_fgets($imap_stream);
|
|
if (substr($read,0,1) == '+') { // OK so far..
|
|
fputs($imap_stream, "$auth\r\n");
|
|
$read = sqimap_fgets($imap_stream);
|
|
}
|
|
}
|
|
$results=explode(" ",$read,3);
|
|
$response=$results[1];
|
|
$message=$results[2];
|
|
} else {
|
|
$response="BAD";
|
|
$message="Internal SquirrelMail error - unknown IMAP authentication method chosen. Please contact the developers.";
|
|
}
|
|
|
|
/* If the connection was not successful, lets see why */
|
|
if ($response != 'OK') {
|
|
if (!$hide) {
|
|
if ($response != 'NO') {
|
|
/* "BAD" and anything else gets reported here. */
|
|
$message = htmlspecialchars($message);
|
|
set_up_language($squirrelmail_language, true);
|
|
require_once(SM_PATH . 'functions/display_messages.php');
|
|
if ($response == 'BAD') {
|
|
$string = sprintf (_("Bad request: %s")."<br />\r\n", $message);
|
|
} else {
|
|
$string = sprintf (_("Unknown error: %s") . "<br />\n", $message);
|
|
}
|
|
if (isset($read) && is_array($read)) {
|
|
$string .= '<br />' . _("Read data:") . "<br />\n";
|
|
foreach ($read as $line) {
|
|
$string .= htmlspecialchars($line) . "<br />\n";
|
|
}
|
|
}
|
|
error_box($string,$color);
|
|
exit;
|
|
} else {
|
|
/*
|
|
* If the user does not log in with the correct
|
|
* username and password it is not possible to get the
|
|
* correct locale from the user's preferences.
|
|
* Therefore, apply the same hack as on the login
|
|
* screen.
|
|
*
|
|
* $squirrelmail_language is set by a cookie when
|
|
* the user selects language and logs out
|
|
*/
|
|
|
|
set_up_language($squirrelmail_language, true);
|
|
include_once(SM_PATH . 'functions/display_messages.php' );
|
|
sqsession_destroy();
|
|
/* terminate the session nicely */
|
|
sqimap_logout($imap_stream);
|
|
logout_error( _("Unknown user or password incorrect.") );
|
|
exit;
|
|
}
|
|
} else {
|
|
exit;
|
|
}
|
|
}
|
|
|
|
/* Special error case:
|
|
* Login referrals. The server returns:
|
|
* ? OK [REFERRAL <imap url>]
|
|
* Check RFC 2221 for details. Since we do not support login referrals yet
|
|
* we log the user out.
|
|
*/
|
|
if ( stristr($message, 'REFERRAL imap') === TRUE ) {
|
|
sqimap_logout($imap_stream);
|
|
set_up_language($squirrelmail_language, true);
|
|
include_once(SM_PATH . 'functions/display_messages.php' );
|
|
sqsession_destroy();
|
|
logout_error( _("Your mailbox is not located at this server. Try a different server or consult your system administrator") );
|
|
exit;
|
|
}
|
|
|
|
return $imap_stream;
|
|
}
|
|
|
|
/**
|
|
* Simply logs out the IMAP session
|
|
* @param stream $imap_stream the IMAP connection to log out.
|
|
* @return void
|
|
*/
|
|
function sqimap_logout ($imap_stream) {
|
|
/* Logout is not valid until the server returns 'BYE'
|
|
* If we don't have an imap_ stream we're already logged out */
|
|
if(isset($imap_stream) && $imap_stream)
|
|
sqimap_run_command($imap_stream, 'LOGOUT', false, $response, $message);
|
|
}
|
|
|
|
/**
|
|
* Retrieve the CAPABILITY string from the IMAP server.
|
|
* If capability is set, returns only that specific capability,
|
|
* else returns array of all capabilities.
|
|
* @param stream $imap_stream
|
|
* @param string $capability (since 1.3.0)
|
|
* @param boolean $bUseCache (since 1.5.1) Controls use of capability data stored in session
|
|
* @return mixed (string if $capability is set and found,
|
|
* false, if $capability is set and not found,
|
|
* array if $capability not set)
|
|
*/
|
|
function sqimap_capability($imap_stream, $capability='', $bUseCache=true) {
|
|
// sqgetGlobalVar('sqimap_capabilities', $sqimap_capabilities, SQ_SESSION);
|
|
|
|
if (!$bUseCache || ! sqgetGlobalVar('sqimap_capabilities', $sqimap_capabilities, SQ_SESSION)) {
|
|
$read = sqimap_run_command($imap_stream, 'CAPABILITY', true, $a, $b);
|
|
|
|
$c = explode(' ', $read[0]);
|
|
for ($i=2; $i < count($c); $i++) {
|
|
$cap_list = explode('=', $c[$i]);
|
|
if (isset($cap_list[1])) {
|
|
$sqimap_capabilities[trim($cap_list[0])][] = $cap_list[1];
|
|
} else {
|
|
$sqimap_capabilities[trim($cap_list[0])] = TRUE;
|
|
}
|
|
}
|
|
}
|
|
if ($capability) {
|
|
if (isset($sqimap_capabilities[$capability])) {
|
|
return $sqimap_capabilities[$capability];
|
|
} else {
|
|
return false;
|
|
}
|
|
}
|
|
return $sqimap_capabilities;
|
|
}
|
|
|
|
/**
|
|
* Returns the delimiter between mailboxes: INBOX/Test, or INBOX.Test
|
|
* @param stream $imap_stream
|
|
* @return string
|
|
*/
|
|
function sqimap_get_delimiter ($imap_stream = false) {
|
|
global $sqimap_delimiter, $optional_delimiter;
|
|
|
|
/* Use configured delimiter if set */
|
|
if((!empty($optional_delimiter)) && $optional_delimiter != 'detect') {
|
|
return $optional_delimiter;
|
|
}
|
|
|
|
/* Delimiter is stored in the session from redirect. Try fetching from there first */
|
|
if (empty($sqimap_delimiter)) {
|
|
sqgetGlobalVar('delimiter',$sqimap_delimiter,SQ_SESSION);
|
|
}
|
|
|
|
/* Do some caching here */
|
|
if (!$sqimap_delimiter) {
|
|
if (sqimap_capability($imap_stream, 'NAMESPACE')) {
|
|
/*
|
|
* According to something that I can't find, this is supposed to work on all systems
|
|
* OS: This won't work in Courier IMAP.
|
|
* OS: According to rfc2342 response from NAMESPACE command is:
|
|
* OS: * NAMESPACE (PERSONAL NAMESPACES) (OTHER_USERS NAMESPACE) (SHARED NAMESPACES)
|
|
* OS: We want to lookup all personal NAMESPACES...
|
|
*/
|
|
$read = sqimap_run_command($imap_stream, 'NAMESPACE', true, $a, $b);
|
|
if (eregi('\\* NAMESPACE +(\\( *\\(.+\\) *\\)|NIL) +(\\( *\\(.+\\) *\\)|NIL) +(\\( *\\(.+\\) *\\)|NIL)', $read[0], $data)) {
|
|
if (eregi('^\\( *\\((.*)\\) *\\)', $data[1], $data2)) {
|
|
$pn = $data2[1];
|
|
}
|
|
$pna = explode(')(', $pn);
|
|
while (list($k, $v) = each($pna)) {
|
|
$lst = explode('"', $v);
|
|
if (isset($lst[3])) {
|
|
$pn[$lst[1]] = $lst[3];
|
|
} else {
|
|
$pn[$lst[1]] = '';
|
|
}
|
|
}
|
|
}
|
|
$sqimap_delimiter = $pn[0];
|
|
} else {
|
|
fputs ($imap_stream, ". LIST \"INBOX\" \"\"\r\n");
|
|
$read = sqimap_read_data($imap_stream, '.', true, $a, $b);
|
|
$read = $read['.'][0]; //sqimap_read_data() now returns a tag array of response array
|
|
$quote_position = strpos ($read[0], '"');
|
|
$sqimap_delimiter = substr ($read[0], $quote_position+1, 1);
|
|
}
|
|
}
|
|
return $sqimap_delimiter;
|
|
}
|
|
|
|
/**
|
|
* This encodes a mailbox name for use in IMAP commands.
|
|
* @param string $what the mailbox to encode
|
|
* @return string the encoded mailbox string
|
|
* @since 1.5.0
|
|
*/
|
|
function sqimap_encode_mailbox_name($what)
|
|
{
|
|
if (ereg("[\"\\\r\n]", $what))
|
|
return '{' . strlen($what) . "}\r\n" . $what; /* 4.3 literal form */
|
|
return '"' . $what . '"'; /* 4.3 quoted string form */
|
|
}
|
|
|
|
/**
|
|
* Gets the number of messages in the current mailbox.
|
|
*
|
|
* OBSOLETE use sqimap_status_messages instead.
|
|
* @param stream $imap_stream imap stream
|
|
* @param string $mailbox
|
|
* @deprecated
|
|
*/
|
|
function sqimap_get_num_messages ($imap_stream, $mailbox) {
|
|
$read_ary = sqimap_run_command ($imap_stream, 'EXAMINE ' . sqimap_encode_mailbox_name($mailbox), false, $result, $message);
|
|
for ($i = 0; $i < count($read_ary); $i++) {
|
|
if (ereg("[^ ]+ +([^ ]+) +EXISTS", $read_ary[$i], $regs)) {
|
|
return $regs[1];
|
|
}
|
|
}
|
|
return false; //"BUG! Couldn't get number of messages in $mailbox!";
|
|
}
|
|
|
|
/**
|
|
* OBSOLETE FUNCTION should be removed after mailbox_display,
|
|
* printMessage function is adapted
|
|
* $addr_ar = array(), $group = '' and $host='' arguments are used in 1.4.0
|
|
* @param string $address
|
|
* @param integer $max
|
|
* @since 1.4.0
|
|
* @deprecated See Rfc822Address.php
|
|
*/
|
|
function parseAddress($address, $max=0) {
|
|
$aAddress = parseRFC822Address($address,array('limit'=> $max));
|
|
/*
|
|
* Because the expected format of the array element is changed we adapt it now.
|
|
* This also implies that this function is obsolete and should be removed after the
|
|
* rest of the source is adapted. See Rfc822Address.php for the new function.
|
|
*/
|
|
array_walk($aAddress, '_adaptAddress');
|
|
return $aAddress;
|
|
}
|
|
|
|
/**
|
|
* OBSOLETE FUNCTION should be removed after mailbox_display,
|
|
* printMessage function is adapted
|
|
*
|
|
* callback function used for formating of addresses array in
|
|
* parseAddress() function
|
|
* @param array $aAddr
|
|
* @param integer $k array key
|
|
* @since 1.5.1
|
|
* @deprecated
|
|
*/
|
|
function _adaptAddress(&$aAddr,$k) {
|
|
$sPersonal = (isset($aAddr[SQM_ADDR_PERSONAL]) && $aAddr[SQM_ADDR_PERSONAL]) ?
|
|
$aAddr[SQM_ADDR_PERSONAL] : '';
|
|
$sEmail = ($aAddr[SQM_ADDR_HOST]) ?
|
|
$aAddr[SQM_ADDR_MAILBOX] . '@'.$aAddr[SQM_ADDR_HOST] :
|
|
$aAddr[SQM_ADDR_MAILBOX];
|
|
$aAddr = array($sEmail,$sPersonal);
|
|
}
|
|
|
|
/**
|
|
* Returns the number of unseen messages in this folder.
|
|
* obsoleted by sqimap_status_messages !
|
|
* Arguments differ in 1.0.x
|
|
* @param stream $imap_stream
|
|
* @param string $mailbox
|
|
* @return integer
|
|
* @deprecated
|
|
*/
|
|
function sqimap_unseen_messages ($imap_stream, $mailbox) {
|
|
$aStatus = sqimap_status_messages($imap_stream,$mailbox,array('UNSEEN'));
|
|
return $aStatus['UNSEEN'];
|
|
}
|
|
|
|
/**
|
|
* Returns the status items of a mailbox.
|
|
* Default it returns MESSAGES,UNSEEN and RECENT
|
|
* Supported status items are MESSAGES, UNSEEN, RECENT (since 1.4.0),
|
|
* UIDNEXT (since 1.5.1) and UIDVALIDITY (since 1.5.1)
|
|
* @param stream $imap_stream imap stream
|
|
* @param string $mailbox mail folder
|
|
* @param array $aStatusItems status items
|
|
* @return array
|
|
* @since 1.3.2
|
|
*/
|
|
function sqimap_status_messages ($imap_stream, $mailbox,
|
|
$aStatusItems = array('MESSAGES','UNSEEN','RECENT')) {
|
|
|
|
$aStatusItems = implode(' ',$aStatusItems);
|
|
$read_ary = sqimap_run_command ($imap_stream, 'STATUS ' . sqimap_encode_mailbox_name($mailbox) .
|
|
" ($aStatusItems)", false, $result, $message);
|
|
$i = 0;
|
|
$messages = $unseen = $recent = $uidnext = $uidvalidity = false;
|
|
$regs = array(false,false);
|
|
while (isset($read_ary[$i])) {
|
|
if (preg_match('/UNSEEN\s+([0-9]+)/i', $read_ary[$i], $regs)) {
|
|
$unseen = $regs[1];
|
|
}
|
|
if (preg_match('/MESSAGES\s+([0-9]+)/i', $read_ary[$i], $regs)) {
|
|
$messages = $regs[1];
|
|
}
|
|
if (preg_match('/RECENT\s+([0-9]+)/i', $read_ary[$i], $regs)) {
|
|
$recent = $regs[1];
|
|
}
|
|
if (preg_match('/UIDNEXT\s+([0-9]+)/i', $read_ary[$i], $regs)) {
|
|
$uidnext = $regs[1];
|
|
}
|
|
if (preg_match('/UIDVALIDITY\s+([0-9]+)/i', $read_ary[$i], $regs)) {
|
|
$uidvalidity = $regs[1];
|
|
}
|
|
$i++;
|
|
}
|
|
return array('MESSAGES' => $messages,
|
|
'UNSEEN'=>$unseen,
|
|
'RECENT' => $recent,
|
|
'UIDNEXT' => $uidnext,
|
|
'UIDVALIDITY' => $uidvalidity);
|
|
}
|
|
|
|
|
|
/**
|
|
* Saves a message to a given folder -- used for saving sent messages
|
|
* @param stream $imap_stream
|
|
* @param string $sent_folder
|
|
* @param $length
|
|
*/
|
|
function sqimap_append ($imap_stream, $sent_folder, $length) {
|
|
fputs ($imap_stream, sqimap_session_id() . ' APPEND ' . sqimap_encode_mailbox_name($sent_folder) . " (\\Seen) {".$length."}\r\n");
|
|
$tmp = fgets ($imap_stream, 1024);
|
|
sqimap_append_checkresponse($tmp, $sent_folder);
|
|
}
|
|
|
|
/**
|
|
* @param stream imap_stream
|
|
* @param string $folder (since 1.3.2)
|
|
*/
|
|
function sqimap_append_done ($imap_stream, $folder='') {
|
|
fputs ($imap_stream, "\r\n");
|
|
$tmp = fgets ($imap_stream, 1024);
|
|
sqimap_append_checkresponse($tmp, $folder);
|
|
}
|
|
|
|
/**
|
|
* Displays error messages, if there are errors in responses to
|
|
* commands issues by sqimap_append() and sqimap_append_done() functions.
|
|
* @param string $response
|
|
* @param string $folder
|
|
* @since 1.5.1
|
|
*/
|
|
function sqimap_append_checkresponse($response, $folder) {
|
|
|
|
if (preg_match("/(.*)(BAD|NO)(.*)$/", $response, $regs)) {
|
|
global $squirrelmail_language, $color;
|
|
set_up_language($squirrelmail_language);
|
|
require_once(SM_PATH . 'functions/display_messages.php');
|
|
|
|
$reason = $regs[3];
|
|
if ($regs[2] == 'NO') {
|
|
$string = "<b><font color=\"$color[2]\">\n" .
|
|
_("ERROR: Could not append message to") ." $folder." .
|
|
"</b><br />\n" .
|
|
_("Server responded:") . ' ' .
|
|
$reason . "<br />\n";
|
|
if (preg_match("/(.*)(quota)(.*)$/i", $reason, $regs)) {
|
|
$string .= _("Solution:") . ' ' .
|
|
_("Remove unneccessary messages from your folder and start with your Trash folder.")
|
|
."<br />\n";
|
|
}
|
|
$string .= "</font>\n";
|
|
error_box($string,$color);
|
|
} else {
|
|
$string = "<b><font color=\"$color[2]\">\n" .
|
|
_("ERROR: Bad or malformed request.") .
|
|
"</b><br />\n" .
|
|
_("Server responded:") . ' ' .
|
|
$reason . "</font><br />\n";
|
|
error_box($string,$color);
|
|
exit;
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Allows mapping of IMAP server address with custom function
|
|
* see map_yp_alias()
|
|
* @param string $imap_server imap server address or mapping
|
|
* @param string $username
|
|
* @return string
|
|
* @since 1.3.0
|
|
*/
|
|
function sqimap_get_user_server ($imap_server, $username) {
|
|
if (substr($imap_server, 0, 4) != "map:") {
|
|
return $imap_server;
|
|
}
|
|
$function = substr($imap_server, 4);
|
|
return $function($username);
|
|
}
|
|
|
|
/**
|
|
* This is an example that gets IMAP servers from yellowpages (NIS).
|
|
* you can simple put map:map_yp_alias in your $imap_server_address
|
|
* in config.php use your own function instead map_yp_alias to map your
|
|
* LDAP whatever way to find the users IMAP server.
|
|
*
|
|
* Requires access to external ypmatch program
|
|
* FIXME: it can be implemented in php yp extension or pecl (since php 5.1.0)
|
|
* @param string $username
|
|
* @return string
|
|
* @since 1.3.0
|
|
*/
|
|
function map_yp_alias($username) {
|
|
$yp = `ypmatch $username aliases`;
|
|
return chop(substr($yp, strlen($username)+1));
|
|
}
|
|
|
|
?>
|