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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::Client;
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);
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 $self;
}
sub login_uri {
my ($self, $target) = @_;
$target->query_param(GoAheadAndLogIn => 1);
$target->query_param(github_login => 1);
$target->query_param_delete('logout');
my $uri = URI->new(GH_AUTHORIZE_URI);
$uri->query_form(
client_id => Bugzilla->params->{github_client_id},
scope => 'user:email',
state => $self->get_state($target),
redirect_uri => $target,
);
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 $digest->hexdigest;
}
sub get_state {
my ($class, $target) = @_;
my $sorted_target = $target->clone;
$sorted_target->query_form({});
foreach my $key (sort $target->query_param) {
$sorted_target->query_param($key, $target->query_param($key));
}
$sorted_target->query_param_delete("code");
$sorted_target->query_param_delete("state");
$sorted_target->query_param_delete('github_email_key');
$sorted_target->query_param_delete('github_email');
$sorted_target->query_param_delete('GoAheadAndLogIn');
$sorted_target->query_param_delete('github_login');
my $cgi = Bugzilla->cgi;
my $digest = Digest->new(DIGEST_HASH);
$digest->add($sorted_target->as_string);
$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;
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