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[git.ikiwiki.info.git] / IkiWiki / Plugin / openid.pm
1 #!/usr/bin/perl
2 # OpenID support.
3 package IkiWiki::Plugin::openid;
5 use warnings;
6 use strict;
7 use IkiWiki 3.00;
9 sub import {
10         add_underlay("openid-selector");
11         hook(type => "checkconfig", id => "openid", call => \&checkconfig);
12         hook(type => "getsetup", id => "openid", call => \&getsetup);
13         hook(type => "auth", id => "openid", call => \&auth);
14         hook(type => "formbuilder_setup", id => "openid",
15                 call => \&formbuilder_setup, last => 1);
16 }
18 sub checkconfig () {
19         if ($config{cgi}) {
20                 # Intercept normal signin form, so the openid selector
21                 # can be displayed.
22                 # 
23                 # When other auth hooks are registered, give the selector
24                 # a reference to the normal signin form.
25                 require IkiWiki::CGI;
26                 my $real_cgi_signin;
27                 if (keys %{$IkiWiki::hooks{auth}} > 1) {
28                         $real_cgi_signin=\&IkiWiki::cgi_signin;
29                 }
30                 inject(name => "IkiWiki::cgi_signin", call => sub ($$) {
31                         openid_selector($real_cgi_signin, @_);
32                 });
33         }
34 }
36 sub getsetup () {
37         return
38                 plugin => {
39                         safe => 1,
40                         rebuild => 0,
41                         section => "auth",
42                 },
43                 openid_realm => {
44                         type => "string",
45                         description => "url pattern of openid realm (default is cgiurl)",
46                         safe => 0,
47                         rebuild => 0,
48                 },
49                 openid_cgiurl => {
50                         type => "string",
51                         description => "url to ikiwiki cgi to use for openid authentication (default is cgiurl)",
52                         safe => 0,
53                         rebuild => 0,
54                 },
55 }
57 sub openid_selector {
58         my $real_cgi_signin=shift;
59         my $q=shift;
60         my $session=shift;
62         my $openid_url=$q->param('openid_identifier');
63         my $openid_error;
65         if (! load_openid_module()) {
66                 if ($real_cgi_signin) {
67                         $real_cgi_signin->($q, $session);
68                         exit;
69                 }
70                 error(sprintf(gettext("failed to load openid module: "), @_));
71         }
72         elsif (defined $q->param("action") && $q->param("action") eq "verify") {
73                 validate($q, $session, $openid_url, sub {
74                         $openid_error=shift;
75                 });
76         }
78         my $template=IkiWiki::template("openid-selector.tmpl");
79         $template->param(
80                 cgiurl => IkiWiki::cgiurl(),
81                 (defined $openid_error ? (openid_error => $openid_error) : ()),
82                 (defined $openid_url ? (openid_url => $openid_url) : ()),
83                 ($real_cgi_signin ? (nonopenidform => $real_cgi_signin->($q, $session, 1)) : ()),
84         );
86         IkiWiki::printheader($session);
87         print IkiWiki::cgitemplate($q, "signin", $template->output);
88         exit;
89 }
91 sub formbuilder_setup (@) {
92         my %params=@_;
94         my $form=$params{form};
95         my $session=$params{session};
96         my $cgi=$params{cgi};
97         
98         if ($form->title eq "preferences" &&
99                IkiWiki::openiduser($session->param("name"))) {
100                 $form->field(name => "openid_identifier", disabled => 1,
101                         label => htmllink("", "", "ikiwiki/OpenID", noimageinline => 1),
102                         value => $session->param("name"), 
103                         size => length($session->param("name")), force => 1,
104                         fieldset => "login");
105                 $form->field(name => "email", type => "hidden");
106         }
109 sub validate ($$$;$) {
110         my $q=shift;
111         my $session=shift;
112         my $openid_url=shift;
113         my $errhandler=shift;
115         my $csr=getobj($q, $session);
117         my $claimed_identity = $csr->claimed_identity($openid_url);
118         if (! $claimed_identity) {
119                 if ($errhandler) {
120                         $errhandler->($csr->err);
121                         return 0;
122                 }
123                 else {
124                         error($csr->err);
125                 }
126         }
128         # Ask for client to provide a name and email, if possible.
129         # Try sreg and ax
130         if ($claimed_identity->can("set_extension_args")) {
131                 $claimed_identity->set_extension_args(
132                         'http://openid.net/extensions/sreg/1.1',
133                         {
134                                 optional => 'email,fullname,nickname',
135                         },
136                 );
137                 $claimed_identity->set_extension_args(
138                         'http://openid.net/srv/ax/1.0',
139                         {
140                                 mode => 'fetch_request',
141                                 'required' => 'email,fullname,nickname,firstname',
142                                 'type.email' => "http://schema.openid.net/contact/email",
143                                 'type.fullname' => "http://axschema.org/namePerson",
144                                 'type.nickname' => "http://axschema.org/namePerson/friendly",
145                                 'type.firstname' => "http://axschema.org/namePerson/first",
146                         },
147                 );
148         }
150         my $cgiurl=$config{openid_cgiurl};
151         $cgiurl=$q->url if ! defined $cgiurl;
153         my $trust_root=$config{openid_realm};
154         $trust_root=$cgiurl if ! defined $trust_root;
156         my $check_url = $claimed_identity->check_url(
157                 return_to => "$cgiurl?do=postsignin",
158                 trust_root => $trust_root,
159                 delayed_return => 1,
160         );
161         # Redirect the user to the OpenID server, which will
162         # eventually bounce them back to auth()
163         IkiWiki::redirect($q, $check_url);
164         exit 0;
167 sub auth ($$) {
168         my $q=shift;
169         my $session=shift;
171         if (defined $q->param('openid.mode')) {
172                 my $csr=getobj($q, $session);
174                 if (my $setup_url = $csr->user_setup_url) {
175                         IkiWiki::redirect($q, $setup_url);
176                 }
177                 elsif ($csr->user_cancel) {
178                         IkiWiki::redirect($q, IkiWiki::baseurl(undef));
179                 }
180                 elsif (my $vident = $csr->verified_identity) {
181                         $session->param(name => $vident->url);
183                         my @extensions;
184                         if ($vident->can("signed_extension_fields")) {
185                                 @extensions=grep { defined } (
186                                         $vident->signed_extension_fields('http://openid.net/extensions/sreg/1.1'),
187                                         $vident->signed_extension_fields('http://openid.net/srv/ax/1.0'),
188                                 );
189                         }
190                         my $nickname;
191                         foreach my $ext (@extensions) {
192                                 foreach my $field (qw{value.email email}) {
193                                         if (exists $ext->{$field} &&
194                                             defined $ext->{$field} &&
195                                             length $ext->{$field}) {
196                                                 $session->param(email => $ext->{$field});
197                                                 if (! defined $nickname &&
198                                                     $ext->{$field}=~/(.+)@.+/) {
199                                                         $nickname = $1;
200                                                 }
201                                                 last;
202                                         }
203                                 }
204                                 foreach my $field (qw{value.nickname nickname value.fullname fullname value.firstname}) {
205                                         if (exists $ext->{$field} &&
206                                             defined $ext->{$field} &&
207                                             length $ext->{$field}) {
208                                                 $nickname=$ext->{$field};
209                                                 last;
210                                         }
211                                 }
212                         }
213                         if (defined $nickname) {
214                                 $session->param(nickname =>
215                                         Encode::decode_utf8($nickname));
216                         }
217                 }
218                 else {
219                         error("OpenID failure: ".$csr->err);
220                 }
221         }
222         elsif (defined $q->param('openid_identifier')) {
223                 # myopenid.com affiliate support
224                 validate($q, $session, $q->param('openid_identifier'));
225         }
228 sub getobj ($$) {
229         my $q=shift;
230         my $session=shift;
232         eval q{use Net::OpenID::Consumer};
233         error($@) if $@;
235         my $ua;
236         eval q{use LWPx::ParanoidAgent};
237         if (! $@) {
238                 $ua=LWPx::ParanoidAgent->new;
239         }
240         else {
241                 $ua=LWP::UserAgent->new;
242         }
244         # Store the secret in the session.
245         my $secret=$session->param("openid_secret");
246         if (! defined $secret) {
247                 $secret=rand;
248                 $session->param(openid_secret => $secret);
249         }
250         
251         my $cgiurl=$config{openid_cgiurl};
252         $cgiurl=$q->url if ! defined $cgiurl;
254         return Net::OpenID::Consumer->new(
255                 ua => $ua,
256                 args => $q,
257                 consumer_secret => sub { return shift()+$secret },
258                 required_root => $cgiurl,
259         );
262 sub load_openid_module {
263         # Give up if module is unavailable to avoid needing to depend on it.
264         eval q{use Net::OpenID::Consumer};
265         if ($@) {
266                 debug("unable to load Net::OpenID::Consumer, not enabling OpenID login ($@)");
267                 return;
268         }
269         return 1;