aboutsummaryrefslogtreecommitdiffstats
path: root/Token.pm
blob: 4f7f61882ef341ce7bec31fbd1568721a4840288 (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
# -*- 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 diagnostics;
use strict;

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

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

################################################################################
# Functions
################################################################################

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) = @_;

    # Retrieve the user's ID from the database.
    my $quotedloginname = &::SqlQuote($loginname);
    &::SendSQL("SELECT userid FROM profiles WHERE login_name = $quotedloginname");
    my ($userid) = &::FetchSQLData();

    # Generate a unique token and insert it into the tokens table.
    # We have to lock the tokens table before generating the token, 
    # since the database must be queried for token uniqueness.
    &::SendSQL("LOCK TABLES tokens WRITE");
    my $token = GenerateUniqueToken();
    my $quotedtoken = &::SqlQuote($token);
    my $quotedipaddr = &::SqlQuote($::ENV{'REMOTE_ADDR'});
    &::SendSQL("INSERT INTO tokens ( userid , issuedate , token , tokentype , eventdata )
                VALUES      ( $userid , NOW() , $quotedtoken , 'password' , $quotedipaddr )");
    &::SendSQL("UNLOCK TABLES");

    # Mail the user the token along with instructions for using it.
    MailPasswordToken($loginname, $token);

}


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 $tries = 0;
    while ($duplicate) {

        ++$tries;
        if ($tries > 100) {
            &::DisplayError("Something is seriously wrong with the token generation system.");
            exit;
        }

        $token = &::GenerateRandomPassword();
        &::SendSQL("SELECT userid FROM tokens WHERE token = " . &::SqlQuote($token));
        $duplicate = &::FetchSQLData();
    }

    return $token;

}

sub MailPasswordToken {
    # Emails a password token to a user along with instructions for its use.
    # Called exclusively from &IssuePasswordToken.

    my ($emailaddress, $token) = @_;

    my $urlbase = &::Param("urlbase");
    my $emailsuffix = &::Param('emailsuffix');
    $token = &::url_quote($token);

    open SENDMAIL, "|/usr/lib/sendmail -t -i";

    print SENDMAIL qq|From: bugzilla-daemon
To: $emailaddress$emailsuffix
Subject: Bugzilla Change Password Request

You or someone impersonating you has requested to change your Bugzilla
password.  To change your password, visit the following link:

${urlbase}token.cgi?a=cfmpw&t=$token

If you are not the person who made this request, or you wish to cancel
this request, visit the following link:

${urlbase}token.cgi?a=cxlpw&t=$token
|;
    close SENDMAIL;
}

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) = @_;

    # Quote the token for inclusion in SQL statements.
    my $quotedtoken = &::SqlQuote($token);
    
    # Get information about the token being cancelled.
    &::SendSQL("SELECT  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');

    # Format the user's real name and email address into a single string.
    my $username = $realname ? $realname . " <" . $loginname . ">" : $loginname;

    # Notify the user via email about the cancellation.
    open SENDMAIL, "|/usr/lib/sendmail -t -i";
    print SENDMAIL qq|From: bugzilla-daemon
To: $username
Subject: "$tokentype" token cancelled

A token was cancelled from $::ENV{'REMOTE_ADDR'}.  This is either 
an honest mistake or the result of a malicious hack attempt.  
Take a look at the information below and forward this email 
to $maintainer if you suspect foul play.

            Token: $token
       Token Type: $tokentype
             User: $username
       Issue Date: $issuedate
       Event Data: $eventdata

Cancelled Because: $cancelaction
|;
    close SENDMAIL;

    # Delete the token from the database.
    &::SendSQL("LOCK TABLES tokens WRITE");
    &::SendSQL("DELETE FROM tokens WHERE token = $quotedtoken");
    &::SendSQL("UNLOCK TABLES");
}

sub HasPasswordToken {
    # Returns a password token if the user has one.  Otherwise returns 0 (false).
    
    my ($userid) = @_;
    
    &::SendSQL("SELECT token FROM tokens WHERE userid = $userid LIMIT 1");
    my ($token) = &::FetchSQLData();
    
    return $token;
}

1;