aboutsummaryrefslogtreecommitdiffstats
path: root/Bugzilla/Token.pm
blob: fe72915a36b4a725d2f0599b50fc5d7853f87e03 (plain)
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
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
# -*- Mode: perl; indent-tabs-mode: nil -*-
#
# The contents of this file are subject to the Mozilla Public
# License Version 1.1 (the "License"); you may not use this file
# except in compliance with the License. You may obtain a copy of
# the License at http://www.mozilla.org/MPL/
#
# Software distributed under the License is distributed on an "AS
# IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
# implied. See the License for the specific language governing
# rights and limitations under the License.
#
# The Original Code is the Bugzilla Bug Tracking System.
#
# The Initial Developer of the Original Code is Netscape Communications
# Corporation. Portions created by Netscape are
# Copyright (C) 1998 Netscape Communications Corporation. All
# Rights Reserved.
#
# Contributor(s):    Myk Melez <myk@mozilla.org>

################################################################################
# Module Initialization
################################################################################

# Make it harder for us to do dangerous things in Perl.
use strict;

# Bundle the functions in this file together into the "Bugzilla::Token" package.
package Bugzilla::Token;

use Bugzilla::Config;
use Bugzilla::Error;
use Bugzilla::BugMail;
use Bugzilla::Util;

use Date::Format;
use Date::Parse;

# This module requires that its caller have said "require CGI.pl" to import
# relevant functions from that script and its companion globals.pl.

################################################################################
# Constants
################################################################################

# The maximum number of days a token will remain valid.
my $maxtokenage = 3;

################################################################################
# Public Functions
################################################################################

sub IssueEmailChangeToken {
    my ($userid, $old_email, $new_email) = @_;

    my ($token, $token_ts) = _create_token($userid, 'emailold', $old_email . ":" . $new_email);

    my $newtoken = _create_token($userid, 'emailnew', $old_email . ":" . $new_email);

    # Mail the user the token along with instructions for using it.

    my $template = $::template;
    my $vars = $::vars;

    $vars->{'oldemailaddress'} = $old_email . Param('emailsuffix');
    $vars->{'newemailaddress'} = $new_email . Param('emailsuffix');
    
    $vars->{'max_token_age'} = $maxtokenage;
    $vars->{'token_ts'} = $token_ts;

    $vars->{'token'} = $token;
    $vars->{'emailaddress'} = $old_email . Param('emailsuffix');

    my $message;
    $template->process("account/email/change-old.txt.tmpl", $vars, \$message)
      || ThrowTemplateError($template->error());

    Bugzilla::BugMail::MessageToMTA($message);

    $vars->{'token'} = $newtoken;
    $vars->{'emailaddress'} = $new_email . Param('emailsuffix');

    $message = "";
    $template->process("account/email/change-new.txt.tmpl", $vars, \$message)
      || ThrowTemplateError($template->error());

    Bugzilla::BugMail::MessageToMTA($message);
}

sub IssuePasswordToken {
    # Generates a random token, adds it to the tokens table, and sends it
    # to the user with instructions for using it to change their password.

    my ($loginname) = @_;

    my $dbh = Bugzilla->dbh;

    # Retrieve the user's ID from the database.
    my $quotedloginname = &::SqlQuote($loginname);
    &::SendSQL("SELECT profiles.userid, tokens.issuedate FROM profiles 
                    LEFT JOIN tokens
                    ON tokens.userid = profiles.userid
                    AND tokens.tokentype = 'password'
                    AND tokens.issuedate > NOW() - " .
                    $dbh->sql_interval('10 MINUTE') . "
                 WHERE " . $dbh->sql_istrcmp('login_name', $quotedloginname));
    my ($userid, $toosoon) = &::FetchSQLData();

    if ($toosoon) {
        ThrowUserError('too_soon_for_new_token');
    };

    my ($token, $token_ts) = _create_token($userid, 'password', $::ENV{'REMOTE_ADDR'});

    # Mail the user the token along with instructions for using it.
    
    my $template = $::template;
    my $vars = $::vars;

    $vars->{'token'} = $token;
    $vars->{'emailaddress'} = $loginname . Param('emailsuffix');

    $vars->{'max_token_age'} = $maxtokenage;
    $vars->{'token_ts'} = $token_ts;

    my $message = "";
    $template->process("account/password/forgotten-password.txt.tmpl", 
                                                               $vars, \$message)
      || ThrowTemplateError($template->error());

    Bugzilla::BugMail::MessageToMTA($message);
}

sub IssueSessionToken {
    # Generates a random token, adds it to the tokens table, and returns
    # the token to the caller.

    my $data = shift;
    return _create_token(Bugzilla->user->id, 'session', $data);
}

sub CleanTokenTable {
    my $dbh = Bugzilla->dbh;
    $dbh->bz_lock_tables('tokens WRITE');
    &::SendSQL("DELETE FROM tokens WHERE " .
               $dbh->sql_to_days('NOW()') . " - " .
               $dbh->sql_to_days('issuedate') . " >= " . $maxtokenage);
    $dbh->bz_unlock_tables();
}

sub GenerateUniqueToken {
    # Generates a unique random token.  Uses &GenerateRandomPassword 
    # for the tokens themselves and checks uniqueness by searching for
    # the token in the "tokens" table.  Gives up if it can't come up
    # with a token after about one hundred tries.

    my $token;
    my $duplicate = 1;
    my $tries = 0;

    my $dbh = Bugzilla->dbh;
    my $sth = $dbh->prepare("SELECT userid FROM tokens WHERE token = ?");

    while ($duplicate) {
        ++$tries;
        if ($tries > 100) {
            ThrowCodeError("token_generation_error");
        }
        $token = &::GenerateRandomPassword();
        $sth->execute($token);
        $duplicate = $sth->fetchrow_array;
    }

    return $token;
}

sub Cancel {
    # Cancels a previously issued token and notifies the system administrator.
    # This should only happen when the user accidentally makes a token request
    # or when a malicious hacker makes a token request on behalf of a user.
    
    my ($token, $cancelaction) = @_;

    my $dbh = Bugzilla->dbh;

    # Quote the token for inclusion in SQL statements.
    my $quotedtoken = &::SqlQuote($token);
    
    # Get information about the token being cancelled.
    &::SendSQL("SELECT  " . $dbh->sql_date_format('issuedate') . ",
                        tokentype , eventdata , login_name , realname
                FROM    tokens, profiles 
                WHERE   tokens.userid = profiles.userid
                AND     token = $quotedtoken");
    my ($issuedate, $tokentype, $eventdata, $loginname, $realname) = &::FetchSQLData();

    # Get the email address of the Bugzilla maintainer.
    my $maintainer = Param('maintainer');

    my $template = $::template;
    my $vars = $::vars;

    $vars->{'emailaddress'} = $loginname . Param('emailsuffix');
    $vars->{'maintainer'} = $maintainer;
    $vars->{'remoteaddress'} = $::ENV{'REMOTE_ADDR'};
    $vars->{'token'} = $token;
    $vars->{'tokentype'} = $tokentype;
    $vars->{'issuedate'} = $issuedate;
    $vars->{'eventdata'} = $eventdata;
    $vars->{'cancelaction'} = $cancelaction;

    # Notify the user via email about the cancellation.

    my $message;
    $template->process("account/cancel-token.txt.tmpl", $vars, \$message)
      || ThrowTemplateError($template->error());

    Bugzilla::BugMail::MessageToMTA($message);

    # Delete the token from the database.
    DeleteToken($token);
}

sub DeletePasswordTokens {
    my ($userid, $reason) = @_;

    my $dbh = Bugzilla->dbh;
    my $sth = $dbh->prepare("SELECT token " .
                            "FROM tokens " .
                            "WHERE userid=? AND tokentype='password'");
    $sth->execute($userid);
    while (my $token = $sth->fetchrow_array) {
        Bugzilla::Token::Cancel($token, $reason);
    }
}

sub HasEmailChangeToken {
    # Returns an email change token if the user has one. 
    
    my ($userid) = @_;

    my $dbh = Bugzilla->dbh;
    &::SendSQL("SELECT token FROM tokens WHERE userid = $userid " . 
               "AND (tokentype = 'emailnew' OR tokentype = 'emailold') " . 
               $dbh->sql_limit(1));
    my ($token) = &::FetchSQLData();
    
    return $token;
}

sub GetTokenData($) {
    # Returns the userid, issuedate and eventdata for the specified token

    my ($token) = @_;
    return unless defined $token;
    trick_taint($token);
    
    my $dbh = Bugzilla->dbh;
    return $dbh->selectrow_array(
        "SELECT userid, " . $dbh->sql_date_format('issuedate') . ", eventdata 
         FROM   tokens 
         WHERE  token = ?", undef, $token);
}

sub DeleteToken($) {
    # Deletes specified token

    my ($token) = @_;
    return unless defined $token;
    trick_taint($token);

    my $dbh = Bugzilla->dbh;
    $dbh->bz_lock_tables('tokens WRITE');
    $dbh->do("DELETE FROM tokens WHERE token = ?", undef, $token);
    $dbh->bz_unlock_tables();
}

################################################################################
# Internal Functions
################################################################################

sub _create_token($$$) {
    # Generates a unique token and inserts it into the database
    # Returns the token and the token timestamp
    my ($userid, $tokentype, $eventdata) = @_;

    detaint_natural($userid);
    trick_taint($tokentype);
    trick_taint($eventdata);

    my $dbh = Bugzilla->dbh;
    $dbh->bz_lock_tables('tokens WRITE');

    my $token = GenerateUniqueToken();

    $dbh->do("INSERT INTO tokens (userid, issuedate, token, tokentype, eventdata)
        VALUES (?, NOW(), ?, ?, ?)", undef, ($userid, $token, $tokentype, $eventdata));

    $dbh->bz_unlock_tables();

    if (wantarray) {
        my (undef, $token_ts, undef) = GetTokenData($token);
        $token_ts = str2time($token_ts);
        return ($token, $token_ts);
    } else {
        return $token;
    }
}

1;