1<?php
2/**
3 * Mail functions
4 *
5 * @license    GPL 2 (http://www.gnu.org/licenses/gpl.html)
6 * @author     Andreas Gohr <andi@splitbrain.org>
7 */
8
9// end of line for mail lines - RFC822 says CRLF but postfix (and other MTAs?)
10// think different
11if(!defined('MAILHEADER_EOL')) define('MAILHEADER_EOL',"\n");
12#define('MAILHEADER_ASCIIONLY',1);
13
14/**
15 * Patterns for use in email detection and validation
16 *
17 * NOTE: there is an unquoted '/' in RFC2822_ATEXT, it must remain unquoted to be used in the parser
18 * the pattern uses non-capturing groups as captured groups aren't allowed in the parser
19 * select pattern delimiters with care!
20 *
21 * May not be completly RFC conform!
22 * @link http://www.faqs.org/rfcs/rfc2822.html (paras 3.4.1 & 3.2.4)
23 *
24 * @author Chris Smith <chris@jalakai.co.uk>
25 * Check if a given mail address is valid
26 */
27if (!defined('RFC2822_ATEXT')) define('RFC2822_ATEXT',"0-9a-zA-Z!#$%&'*+/=?^_`{|}~-");
28if (!defined('PREG_PATTERN_VALID_EMAIL')) define(
29    'PREG_PATTERN_VALID_EMAIL',
30    '['.RFC2822_ATEXT.']+(?:\.['.RFC2822_ATEXT.']+)*@(?i:[0-9a-z][0-9a-z-]*\.)+(?i:[a-z]{2,63})'
31);
32
33/**
34 * Prepare mailfrom replacement patterns
35 *
36 * Also prepares a mailfromnobody config that contains an autoconstructed address
37 * if the mailfrom one is userdependent and this might not be wanted (subscriptions)
38 *
39 * @author Andreas Gohr <andi@splitbrain.org>
40 */
41function mail_setup(){
42    global $conf;
43    global $USERINFO;
44    /** @var Input $INPUT */
45    global $INPUT;
46
47    // auto constructed address
48    $host = @parse_url(DOKU_URL,PHP_URL_HOST);
49    if(!$host) $host = 'example.com';
50    $noreply = 'noreply@'.$host;
51
52    $replace = array();
53    if(!empty($USERINFO['mail'])){
54        $replace['@MAIL@'] = $USERINFO['mail'];
55    }else{
56        $replace['@MAIL@'] = $noreply;
57    }
58
59    // use 'noreply' if no user
60    $replace['@USER@'] = $INPUT->server->str('REMOTE_USER', 'noreply', true);
61
62    if(!empty($USERINFO['name'])){
63        $replace['@NAME@'] = $USERINFO['name'];
64    }else{
65        $replace['@NAME@'] = '';
66    }
67
68    // apply replacements
69    $from = str_replace(array_keys($replace),
70                        array_values($replace),
71                        $conf['mailfrom']);
72
73    // any replacements done? set different mailfromnone
74    if($from != $conf['mailfrom']){
75        $conf['mailfromnobody'] = $noreply;
76    }else{
77        $conf['mailfromnobody'] = $from;
78    }
79    $conf['mailfrom'] = $from;
80}
81
82/**
83 * Check if a given mail address is valid
84 *
85 * @param   string $email the address to check
86 * @return  bool          true if address is valid
87 */
88function mail_isvalid($email) {
89    return EmailAddressValidator::checkEmailAddress($email, true);
90}
91
92/**
93 * Quoted printable encoding
94 *
95 * @author umu <umuAThrz.tu-chemnitz.de>
96 * @link   http://php.net/manual/en/function.imap-8bit.php#61216
97 *
98 * @param string $sText
99 * @param int $maxlen
100 * @param bool $bEmulate_imap_8bit
101 *
102 * @return string
103 */
104function mail_quotedprintable_encode($sText,$maxlen=74,$bEmulate_imap_8bit=true) {
105    // split text into lines
106    $aLines= preg_split("/(?:\r\n|\r|\n)/", $sText);
107    $cnt = count($aLines);
108
109    for ($i=0;$i<$cnt;$i++) {
110        $sLine =& $aLines[$i];
111        if (strlen($sLine)===0) continue; // do nothing, if empty
112
113        $sRegExp = '/[^\x09\x20\x21-\x3C\x3E-\x7E]/e';
114
115        // imap_8bit encodes x09 everywhere, not only at lineends,
116        // for EBCDIC safeness encode !"#$@[\]^`{|}~,
117        // for complete safeness encode every character :)
118        if ($bEmulate_imap_8bit)
119            $sRegExp = '/[^\x20\x21-\x3C\x3E-\x7E]/';
120
121        $sLine = preg_replace_callback( $sRegExp, 'mail_quotedprintable_encode_callback', $sLine );
122
123        // encode x09,x20 at lineends
124        {
125            $iLength = strlen($sLine);
126            $iLastChar = ord($sLine[$iLength-1]);
127
128            //              !!!!!!!!
129            // imap_8_bit does not encode x20 at the very end of a text,
130            // here is, where I don't agree with imap_8_bit,
131            // please correct me, if I'm wrong,
132            // or comment next line for RFC2045 conformance, if you like
133            if (!($bEmulate_imap_8bit && ($i==count($aLines)-1))){
134                if (($iLastChar==0x09)||($iLastChar==0x20)) {
135                    $sLine[$iLength-1]='=';
136                    $sLine .= ($iLastChar==0x09)?'09':'20';
137                }
138            }
139        }    // imap_8bit encodes x20 before chr(13), too
140        // although IMHO not requested by RFC2045, why not do it safer :)
141        // and why not encode any x20 around chr(10) or chr(13)
142        if ($bEmulate_imap_8bit) {
143            $sLine=str_replace(' =0D','=20=0D',$sLine);
144            //$sLine=str_replace(' =0A','=20=0A',$sLine);
145            //$sLine=str_replace('=0D ','=0D=20',$sLine);
146            //$sLine=str_replace('=0A ','=0A=20',$sLine);
147        }
148
149        // finally split into softlines no longer than $maxlen chars,
150        // for even more safeness one could encode x09,x20
151        // at the very first character of the line
152        // and after soft linebreaks, as well,
153        // but this wouldn't be caught by such an easy RegExp
154        if($maxlen){
155            preg_match_all( '/.{1,'.($maxlen - 2).'}([^=]{0,2})?/', $sLine, $aMatch );
156            $sLine = implode( '=' . MAILHEADER_EOL, $aMatch[0] ); // add soft crlf's
157        }
158    }
159
160    // join lines into text
161    return implode(MAILHEADER_EOL,$aLines);
162}
163
164function mail_quotedprintable_encode_callback($matches){
165    return sprintf( "=%02X", ord ( $matches[0] ) ) ;
166}
167