summaryrefslogtreecommitdiffstats
path: root/extensions/GitHubAuth/lib/Client.pm
blob: 46c070856cde3b94844b02beab68986149d0f2b5 (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
# This Source Code Form is subject to the terms of the Mozilla Public
# License, v. 2.0. If a copy of the MPL was not distributed with this
# file, You can obtain one at http://mozilla.org/MPL/2.0/.
#
# This Source Code Form is "Incompatible With Secondary Licenses", as
# defined by the Mozilla Public License, v. 2.0.

package Bugzilla::Extension::GitHubAuth::Client;

use 5.10.1;
use strict;
use warnings;

use JSON qw(decode_json);
use URI;
use URI::QueryParam;
use Digest;

use Bugzilla::Extension::GitHubAuth::Client::Error qw(ThrowUserError ThrowCodeError);
use Bugzilla::Util qw(remote_ip correct_urlbase);

use constant DIGEST_HASH => 'SHA1';

use fields qw(user_agent);

use constant {
    GH_ACCESS_TOKEN_URI => 'https://github.com/login/oauth/access_token',
    GH_AUTHORIZE_URI    => 'https://github.com/login/oauth/authorize',
    GH_USER_EMAILS_URI  => 'https://api.github.com/user/emails',
};

sub new {
    my ($class, %init) = @_;
    my $self = $class->fields::new();

    return $self;
}

sub login_uri {
    my ($class, $target_uri) = @_;

    my $uri = URI->new(correct_urlbase() . "github.cgi");
    $uri->query_form(target_uri => $target_uri);
    return $uri;
}

sub authorize_uri {
    my ($class, $state) = @_;

    my $uri = URI->new(GH_AUTHORIZE_URI);
    $uri->query_form(
        client_id    => Bugzilla->params->{github_client_id},
        scope        => 'user:email',
        state        => $state,
        redirect_uri => correct_urlbase() . "github.cgi",
    );

    return $uri;
}

sub get_email_key {
    my ($class, $email) = @_;

    my $cgi    = Bugzilla->cgi;
    my $digest = Digest->new(DIGEST_HASH);
    $digest->add($email);
    $digest->add(remote_ip());
    $digest->add($cgi->cookie('Bugzilla_github_token') // Bugzilla->request_cache->{github_token} // '');
    $digest->add(Bugzilla->localconfig->{site_wide_secret});
    return $digest->hexdigest;
}

sub _handle_response {
    my ($self, $response) = @_;
    my $data = eval {
        decode_json($response->content);
    };
    if ($@) {
        ThrowCodeError("github_bad_response", { message => "Unable to parse json response" });
    }

    unless ($response->is_success) {
        ThrowCodeError("github_error", { response => $response });
    }
    return $data;
}

sub get_access_token {
    my ($self, $code) = @_;

    my $response = $self->user_agent->post(
        GH_ACCESS_TOKEN_URI,
        { client_id     => Bugzilla->params->{github_client_id},
          client_secret => Bugzilla->params->{github_client_secret},
          code          => $code },
        Accept => 'application/json',
    );
    my $data = $self->_handle_response($response);
    return $data->{access_token} if exists $data->{access_token};
}

sub get_user_emails {
    my ($self, $access_token) = @_;
    my $uri = URI->new(GH_USER_EMAILS_URI);
    $uri->query_form(access_token => $access_token);

    my $response = $self->user_agent->get($uri, Accept => 'application/json');

    return $self->_handle_response($response);
}

sub user_agent {
    my ($self) = @_;
    $self->{user_agent} //= $self->_build_user_agent;

    return $self->{user_agent};
}

sub _build_user_agent {
    my ($self) = @_;
    my $ua = LWP::UserAgent->new( timeout => 10 );

    if (Bugzilla->params->{proxy_url}) {
        $ua->proxy('https', Bugzilla->params->{proxy_url});
    }

    return $ua;
}

1;