1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
|
<?php
require_once ('config.php');
require_once ('db.php');
$imap_options=['DISABLE_AUTHENTICATOR' => 'CRAM_MD5'];
$imap=imap_open (IMAP_CONN,IMAP_USER,IMAP_PASS,NULL,1,$imap_options);
if (!$imap){
echo 'IMAP errors:<br/>';
foreach (imap_errors() as $err)
echo $err.'<br/>';
die();
}
function verify_signature ($data,$sig)
{
$gnupg=gnupg_init();
$sig_details=gnupg_verify ($gnupg,$data,$sig);
if (!$sig_details)
throw new Exception ('signature verification failed');
$summary=$sig_details[0]['summary'];
if ($summary & 0x0004)
throw new Exception ('bad signature');
if ($summary & 0x0010)
throw new Exception ('key has been revoked');
if ($summary & 0x0020)
throw new Exception ('key has expired');
if ($summary & 0x0040)
throw new Exception ('signature has expired');
if ($summary & 0x0080)
throw new Exception ('can\'t verify: key missing');
if ($summary!=3)
throw new Exception ('unknown signature verification problem ('.$summary.')');
return $sig_details[0]['fingerprint'];
}
function mail_fetch_message ($msg)
{
global $imap;
$guessed_source=null;
/* Fetch user */
$info=imap_headerinfo ($imap,$msg);
$from=$info->from[0]->mailbox.'@'.$info->from[0]->host;
$user=get_user_by_email ($from);
/* Guess source */
if (strpos (imap_utf8 ($info->subject),'[agade]')!==false)
$guessed_source='Agade';
/* Fetch the multipart tree */
$structure=imap_fetchstructure ($imap,$msg);
if ($structure->type!=TYPEMULTIPART)
throw new Exception ('not a multipart message');
if ($structure->subtype!='SIGNED')
throw new Exception ('not a signed message');
/* Find the body and signature */
$body_id=null;
$sig_id=null;
foreach ($structure->parts as $id => $part){
if ($part->type==TYPEAPPLICATION && $part->subtype=='PGP-SIGNATURE')
$sig_id=$id+1;
else
$body_id=$id+1;
}
if (is_null ($sig_id))
throw new Exception ('no signature attachment');
if (is_null ($body_id))
throw new Exception ('no message body');
/* Get contents */
$headers=imap_fetchmime ($imap,$msg,1,FT_INTERNAL | FT_PEEK);
$body=imap_fetchbody ($imap,$msg,$body_id,FT_INTERNAL | FT_PEEK);
$sig=imap_fetchbody ($imap,$msg,$sig_id,FT_PEEK);
/* Verify signature */
$fpr=verify_signature ($headers.$body,$sig);
if ($fpr!=$user['pgp_fingerprint'])
throw new Exception ('illegal key used for signature');
/* Fetch plain-text body */
$body_part=$structure->parts[$body_id-1];
$plain_body=null;
if ($body_part->type==TYPETEXT && $body_part->subtype=='PLAIN'){
$plain_body=$body;
} else if ($body_part->type==TYPEMULTIPART){
foreach ($body_part->parts as $id => $part)
if ($part->type==TYPETEXT && $part->subtype=='PLAIN')
$plain_body=imap_fetchbody ($imap,$msg,$body_id.'.'.($id+1),FT_PEEK);
} else {
throw new Exception ('unknown body part type '.$body_part->type);
}
if (is_null ($plain_body))
throw new Exception ('no plain-text body');
$plain_body=imap_qprint ($plain_body);
return [
'user' => $user,
'body' => $plain_body,
'guessed_source' => $guessed_source
];
}
function mail_get_unseen_messages ()
{
global $imap;
$unseen_msgs=imap_search ($imap,'UNSEEN');
if (!$unseen_msgs)
$unseen_msgs=[];
return $unseen_msgs;
}
function mail_mark_seen ($msg)
{
global $imap;
imap_setflag_full ($imap,$msg,'\Seen');
}
function mail_finish ()
{
global $imap;
imap_close ($imap);
}
function mail_parse_message ($body,$prefill_info=[])
{
$info=[
'title' => null,
'location' => null,
'start_date' => null,
'end_date' => null,
'keywords' => [],
'source' => null,
'description' => null
];
$warnings=[];
foreach ($prefill_info as $key => $val)
$info[$key]=$val;
$lines=explode ("\n",$body);
$headers=[];
$i=0;
foreach ($lines as $line){
$i++;
if (trim ($line)=='')
break;
$parts=explode (':',$line,2);
if (count ($parts) > 1)
$headers[]=['key' => trim ($parts[0]), 'val' => trim ($parts[1])];
else
$headers[count ($headers)-1]['val'].=' '.trim ($line);
}
foreach ($headers as $header){
$key=$header['key'];
$val=$header['val'];
if (levenshtein ($key,'Title') < 2)
$info['title']=$val;
else if (levenshtein ($key,'Location') < 2)
$info['location']=$val;
else if (levenshtein ($key,'Source') < 2)
$info['source']=$val;
else if (levenshtein ($key,'Dates') < 2){
$parts=explode ('to',$val);
if (count ($parts)==2){
$info['start_date']=trim ($parts[0]);
$info['end_date']=trim ($parts[1]);
} else {
$info['start_date']=$info['end_date']=$val;
}
} else if (levenshtein ($key,'Keywords') < 2)
$info['keywords']=array_map ('trim',explode (';',$val));
else
$warnings[]='Unknown key '.$key;
}
$info['description']=trim (implode ("\n",array_slice ($lines,$i)));
foreach (array_keys ($info) as $key)
if (is_null ($info[$key]))
$warnings[]='No '.$key.' found';
return [
'info' => $info,
'warnings' => $warnings
];
}
|
