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
198
199
200
|
<?php
/**
+-------------------------------------------------------------------------+
| S/MIME driver for the Enigma Plugin |
| |
| Copyright (C) The Roundcube Dev Team |
| |
| Licensed under the GNU General Public License version 3 or |
| any later version with exceptions for skins & plugins. |
| See the README file for a full license statement. |
+-------------------------------------------------------------------------+
| Author: Aleksander Machniak <alec@alec.pl> |
+-------------------------------------------------------------------------+
*/
class enigma_driver_phpssl extends enigma_driver
{
private $rc;
private $homedir;
private $user;
function __construct($user)
{
$rcmail = rcmail::get_instance();
$this->rc = $rcmail;
$this->user = $user;
}
/**
* Driver initialization and environment checking.
* Should only return critical errors.
*
* @return mixed NULL on success, enigma_error on failure
*/
function init()
{
$homedir = $this->rc->config->get('enigma_smime_homedir', INSTALL_PATH . '/plugins/enigma/home');
if (!$homedir)
return new enigma_error(enigma_error::INTERNAL,
"Option 'enigma_smime_homedir' not specified");
// check if homedir exists (create it if not) and is readable
if (!file_exists($homedir))
return new enigma_error(enigma_error::INTERNAL,
"Keys directory doesn't exists: $homedir");
if (!is_writable($homedir))
return new enigma_error(enigma_error::INTERNAL,
"Keys directory isn't writeable: $homedir");
$homedir = $homedir . '/' . $this->user;
// check if user's homedir exists (create it if not) and is readable
if (!file_exists($homedir))
mkdir($homedir, 0700);
if (!file_exists($homedir))
return new enigma_error(enigma_error::INTERNAL,
"Unable to create keys directory: $homedir");
if (!is_writable($homedir))
return new enigma_error(enigma_error::INTERNAL,
"Unable to write to keys directory: $homedir");
$this->homedir = $homedir;
}
function encrypt($text, $keys, $sign_key = null)
{
}
function decrypt($text, $keys = [], &$signature = null)
{
}
function sign($text, $key, $mode = null)
{
}
function verify($struct, $message)
{
// use common temp dir
$msg_file = rcube_utils::temp_filename('enigmsg');
$cert_file = rcube_utils::temp_filename('enigcrt');
$fh = fopen($msg_file, "w");
if ($struct->mime_id) {
$message->get_part_body($struct->mime_id, false, 0, $fh);
}
else {
$this->rc->storage->get_raw_body($message->uid, $fh);
}
fclose($fh);
// @TODO: use stored certificates
// try with certificate verification
$sig = openssl_pkcs7_verify($msg_file, 0, $cert_file);
$validity = true;
if ($sig !== true) {
// try without certificate verification
$sig = openssl_pkcs7_verify($msg_file, PKCS7_NOVERIFY, $cert_file);
$validity = enigma_error::UNVERIFIED;
}
if ($sig === true) {
$sig = $this->parse_sig_cert($cert_file, $validity);
}
else {
$errorstr = $this->get_openssl_error();
$sig = new enigma_error(enigma_error::INTERNAL, $errorstr);
}
// remove temp files
@unlink($msg_file);
@unlink($cert_file);
return $sig;
}
public function import($content, $isfile = false, $passwords = [])
{
}
public function export($key, $with_private = false, $passwords = [])
{
}
public function list_keys($pattern='')
{
}
public function get_key($keyid)
{
}
public function gen_key($data)
{
}
public function delete_key($keyid)
{
}
/**
* Returns a name of the hash algorithm used for the last
* signing operation.
*
* @return string Hash algorithm name e.g. sha1
*/
public function signature_algorithm()
{
}
/**
* Converts Crypt_GPG_Key object into Enigma's key object
*
* @param Crypt_GPG_Key $key Key object
*
* @return enigma_key Key object
*/
private function parse_key($key)
{
}
private function get_openssl_error()
{
$tmp = [];
while ($errorstr = openssl_error_string()) {
$tmp[] = $errorstr;
}
return join("\n", array_values($tmp));
}
private function parse_sig_cert($file, $validity)
{
$cert = openssl_x509_parse(file_get_contents($file));
if (empty($cert) || empty($cert['subject'])) {
$errorstr = $this->get_openssl_error();
return new enigma_error(enigma_error::INTERNAL, $errorstr);
}
$data = new enigma_signature();
$data->id = $cert['hash']; //?
$data->valid = $validity;
$data->fingerprint = $cert['serialNumber'];
$data->created = $cert['validFrom_time_t'];
$data->expires = $cert['validTo_time_t'];
$data->name = $cert['subject']['CN'];
// $data->comment = '';
$data->email = $cert['subject']['emailAddress'];
return $data;
}
}
|
