1 package stemmaweb::Authentication::Credential::Google;
3 use Crypt::OpenSSL::X509;
8 use LWP::Simple qw(get);
9 use Date::Parse qw(str2time);
17 stemmaweb::Authentication::Google - JSON Web Token handler for Google tokens.
21 Retrieves Google's public certificates, and then retrieves the key from the
22 cert using L<Crypt::OpenSSL::X509>. Finally, uses the pubkey to decrypt a
23 Google token using L<JSON::WebToken>.
28 my ($class, $config, $app, $realm) = @_;
29 $class = ref $class || $class;
41 my ($self, $c, $realm, $authinfo) =@_;
43 my $id_token = $authinfo->{id_token};
44 $id_token ||= $c->req->method eq 'GET' ?
45 $c->req->query_params->{id_token} : $c->req->body_params->{id_token};
48 $c->log->debug(Dumper $authinfo);
51 Catalyst::Exception->throw("id_token not specified.");
54 my $userinfo = $self->decode($id_token);
57 $c->log->debug(Dumper $userinfo);
59 my $sub = $userinfo->{sub};
60 my $openid = $userinfo->{openid_id};
63 $c->log->debug($openid);
65 if (!$sub || !$openid) {
66 Catalyst::Exception->throw(
67 'Could not retrieve sub and openid from token! Is the token
72 # Do we have a user with the google id already?
73 my $user = $realm->find_user({
81 # Do we have a user with the openid?
83 $user = $realm->find_user({
88 throw ("Could not find a user with that openid or sub!");
91 my $new_user = $realm->add_user({
93 password => $user->password,
97 foreach my $t (@{ $user->traditions }) {
98 $new_user->add_tradition($t);
101 warn ($new_user->id);
103 warn (scalar @{$user->traditions});
104 warn (scalar @{$new_user->traditions});
107 warn (Dumper($user->id));
109 $realm->delete_user({ username => $user->id });
116 =head2 retrieve_certs
118 Retrieves a pair of JSON-encoded certificates from the given URL (defaults to
119 Google's public cert url), and returns the decoded JSON object.
127 Optional. Location where certificates are located.
128 Defaults to https://www.googleapis.com/oauth2/v1/certs.
134 Decoded JSON object containing certificates.
139 my ($self, $url) = @_;
141 $url ||= 'https://www.googleapis.com/oauth2/v1/certs';
142 return decode_json(get($url));
145 =head2 get_key_from_cert
147 Given a pair of certificates $certs (defaults to L</retrieve_certs>),
148 this function returns the public key of the cert identified by $kid.
156 Required. Index of the certificate hash $hash where the cert we want is
161 Optional. A (hashref) pair of certificates.
162 It's retrieved using L</retrieve_certs> if not given,
163 or if the pair is expired.
169 Public key of certificate.
173 sub get_key_from_cert {
174 my ($self, $kid, $certs) = @_;
176 $certs ||= $self->retrieve_certs;
177 my $cert = $certs->{$kid};
178 my $x509 = Crypt::OpenSSL::X509->new_from_string($cert);
180 if ($self->is_cert_expired($x509)) {
181 # If we ended up here, we were given
182 # an old $certs string from the user.
183 # Let's force getting another.
184 return $self->get_key_from_cert($kid);
187 return $x509->pubkey;
190 =head2 is_cert_expired
192 Returns if a given L<Crypt::OpenSSL::X509> certificate is expired.
196 sub is_cert_expired {
197 my ($self, $x509) = @_;
199 my $expiry = str2time($x509->notAfter);
201 return time > $expiry;
206 Returns the decoded information contained in a user's token.
214 Required. The user's token from Google+.
218 Optional. A public key string with which to decode the token.
219 If not given, the public key will be retrieved from $certs.
223 Optional. A pair of public key certs retrieved from Google.
224 If not given, or if the certificates have expired, a new
225 pair of certificates is retrieved.
231 Decoded JSON object from the decrypted token.
236 my ($self, $token, $certs, $pubkey) = @_;
239 my $details = decode_json(
240 MIME::Base64::decode_base64(
241 substr( $token, 0, CORE::index($token, '.') )
245 my $kid = $details->{kid};
246 $pubkey = $self->get_key_from_cert($kid, $certs);
249 return JSON::WebToken->decode($token, $pubkey);
254 Errietta Kostala <e.kostala@shadowcat.co.uk>
258 This library is free software. You can redistribute it and/or modify
259 it under the same terms as Perl itself.