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# 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::Login;
use strict;
use warnings;
use base qw(Bugzilla::Auth::Login);
use fields qw(github_failure);
use Scalar::Util qw(blessed);
use Bugzilla::Constants qw(AUTH_NODATA AUTH_ERROR USAGE_MODE_BROWSER);
use Bugzilla::Util qw(trick_taint correct_urlbase generate_random_password);
use Bugzilla::Token qw(issue_short_lived_session_token set_token_extra_data);
use List::MoreUtils qw(any);
use Bugzilla::Extension::GitHubAuth::Client;
use Bugzilla::Extension::GitHubAuth::Client::Error ();
use Bugzilla::Error;
use constant { requires_verification => 1,
is_automatic => 1,
user_can_create_account => 1 };
sub get_login_info {
my ($self) = @_;
my $cgi = Bugzilla->cgi;
my $github_action = Bugzilla->request_cache->{github_action};
return { failure => AUTH_NODATA } unless $github_action;
my $response;
if ($github_action eq 'login') {
$response = $self->_get_login_info_from_github();
}
elsif ($github_action eq 'email') {
$response = $self->_get_login_info_from_email();
}
if (!exists $response->{failure}) {
if (exists $response->{user}) {
# existing account
my $user = $response->{user};
return { failure => AUTH_ERROR,
user_error => 'github_auth_account_too_powerful' } if $user->in_group('no-github-auth');
return { failure => AUTH_ERROR,
user_error => 'mfa_prevents_login',
details => { provider => 'GitHub' } } if $user->mfa;
$response = {
username => $user->login,
user_id => $user->id,
github_auth => 1,
};
}
else {
# new account
my $email = $response->{email};
$response = {
username => $email,
github_auth => 1,
};
}
}
return $response;
}
sub _get_login_info_from_github {
my ($self) = @_;
my $cgi = Bugzilla->cgi;
my $template = Bugzilla->template;
my $code = $cgi->param('code');
return { failure => AUTH_ERROR, error => 'github_missing_code' } unless $code;
trick_taint($code);
my $client = Bugzilla::Extension::GitHubAuth::Client->new;
my ($access_token, $emails);
eval {
# The following variable lets us catch and return (rather than throw) errors
# from our github client code, as required by the Auth API.
local $Bugzilla::Extension::GitHubAuth::Client::Error::USE_EXCEPTION_OBJECTS = 1;
$access_token = $client->get_access_token($code);
$emails = $client->get_user_emails($access_token);
};
my $e = $@;
if (blessed $e && $e->isa('Bugzilla::Extension::GitHubAuth::Client::Error')) {
my $key = $e->type eq 'user' ? 'user_error' : 'error';
return { failure => AUTH_ERROR, $key => $e->error, details => $e->vars };
}
elsif ($e) {
die $e;
}
my @emails = map { $_->{email} }
grep { $_->{verified} && $_->{email} !~ /\@users\.noreply\.github\.com$/ } @$emails;
my @bugzilla_users;
my @github_emails;
foreach my $email (@emails) {
my $user = Bugzilla::User->new({name => $email, cache => 1});
if ($user) {
push @bugzilla_users, $user;
}
else {
push @github_emails, $email;
}
}
my @allowed_bugzilla_users = grep { not $_->in_group('no-github-auth') } @bugzilla_users;
if (@allowed_bugzilla_users == 1) {
my ($user) = @allowed_bugzilla_users;
return { user => $user };
}
elsif (@allowed_bugzilla_users > 1) {
$self->{github_failure} = {
template => 'account/auth/github-verify-account.html.tmpl',
vars => {
bugzilla_users => \@allowed_bugzilla_users,
choose_email => _mk_choose_email(\@emails),
},
};
return { failure => AUTH_NODATA };
}
elsif (@allowed_bugzilla_users == 0 && @bugzilla_users > 0 && @github_emails == 0) {
return { failure => AUTH_ERROR,
user_error => 'github_auth_account_too_powerful' };
}
elsif (@github_emails) {
$self->{github_failure} = {
template => 'account/auth/github-verify-account.html.tmpl',
vars => {
github_emails => \@github_emails,
choose_email => _mk_choose_email(\@emails),
},
};
return { failure => AUTH_NODATA };
}
else {
return { failure => AUTH_ERROR, user_error => 'github_no_emails' };
}
}
sub _get_login_info_from_email {
my ($self) = @_;
my $cgi = Bugzilla->cgi;
my $email = $cgi->param('email') or return { failure => AUTH_ERROR,
user_error => 'github_invalid_email',
details => { email => '' } };
trick_taint($email);
unless (any { $_ eq $email } @{ Bugzilla->request_cache->{github_emails} }) {
return { failure => AUTH_ERROR,
user_error => 'github_invalid_email',
details => { email => $email }};
}
my $user = Bugzilla::User->new({name => $email, cache => 1});
$cgi->remove_cookie('Bugzilla_github_token');
return $user ? { user => $user } : { email => $email };
}
sub fail_nodata {
my ($self) = @_;
my $cgi = Bugzilla->cgi;
my $template = Bugzilla->template;
ThrowUserError('login_required') if Bugzilla->usage_mode != USAGE_MODE_BROWSER;
my $file = $self->{github_failure}{template} // "account/auth/login.html.tmpl";
my $vars = $self->{github_failure}{vars} // { target => $cgi->url(-relative=>1) };
print $cgi->header();
$template->process($file, $vars) or ThrowTemplateError($template->error());
exit;
}
sub _store_emails {
my ($emails) = @_;
my $state = issue_short_lived_session_token("github_email");
set_token_extra_data($state, { type => 'github_email',
emails => $emails,
target_uri => Bugzilla->request_cache->{github_target_uri} });
Bugzilla->cgi->send_cookie(-name => 'github_state',
-value => $state,
-httponly => 1);
return $state;
}
sub _mk_choose_email {
my ($emails) = @_;
my $state = _store_emails($emails);
return sub {
my $email = shift;
my $uri = URI->new(correct_urlbase() . "github.cgi");
$uri->query_form( state => $state, email => $email );
return $uri;
};
}
1;
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