IkiWiki/Plugin/openid.pm

   1 #!/usr/bin/perl
   2 # OpenID support.
   3 package IkiWiki::Plugin::openid;
   4
   5 use warnings;
   6 use strict;
   7 use IkiWiki 3.00;
   8
   9 sub import {
  10         add_underlay("openid-selector");
  11         hook(type => "checkconfig", id => "openid", call => \&checkconfig);
  12         hook(type => "getopt", id => "openid", call => \&getopt);
  13         hook(type => "getsetup", id => "openid", call => \&getsetup);
  14         hook(type => "auth", id => "openid", call => \&auth);
  15         hook(type => "formbuilder_setup", id => "openid",
  16                 call => \&formbuilder_setup, last => 1);
  17 }
  18
  19 sub checkconfig () {
  20         if ($config{cgi}) {
  21                 # Intercept normal signin form, so the openid selector
  22                 # can be displayed.
  23                 #
  24                 # When other auth hooks are registered, give the selector
  25                 # a reference to the normal signin form.
  26                 my $real_cgi_signin;
  27                 if (keys %{$IkiWiki::hooks{auth}} > 1) {
  28                         require IkiWiki::CGI;
  29                         $real_cgi_signin=\&IkiWiki::cgi_signin;
  30                 }
  31                 inject(name => "IkiWiki::cgi_signin", call => sub ($$) {
  32                         openid_selector($real_cgi_signin, @_);
  33                 });
  34         }
  35 }
  36
  37 sub getopt () {
  38         eval q{use Getopt::Long};
  39         error($@) if $@;
  40         Getopt::Long::Configure('pass_through');
  41         GetOptions("openidsignup=s" => \$config{openidsignup});
  42 }
  43
  44 sub getsetup () {
  45         return
  46                 plugin => {
  47                         safe => 1,
  48                         rebuild => 0,
  49                         section => "auth",
  50                 },
  51                 openidsignup => {
  52                         type => "string",
  53                         example => "http://myopenid.com/",
  54                         description => "an url where users can signup for an OpenID",
  55                         safe => 1,
  56                         rebuild => 0,
  57                 },
  58 }
  59
  60 sub openid_selector {
  61         my $real_cgi_signin=shift;
  62         my $q=shift;
  63         my $session=shift;
  64
  65         my $openid_url=$q->param('openid_identifier');
  66         my $openid_error;
  67
  68         if (! load_openid_module()) {
  69                 if ($real_cgi_signin) {
  70                         $real_cgi_signin->($q, $session);
  71                 }
  72                 error(sprintf(gettext("failed to load openid module: "), @_));
  73         }
  74         elsif (defined $q->param("action") && $q->param("action") eq "verify") {
  75                 validate($q, $session, $openid_url, sub {
  76                         $openid_error=shift;
  77                 });
  78         }
  79         elsif ($q->param("do") eq "signin" && $real_cgi_signin) {
  80                 $real_cgi_signin->($q, $session);
  81                 exit;
  82         }
  83
  84         my $template=IkiWiki::template("openid-selector.tmpl");
  85         $template->param(
  86                 cgiurl => $config{cgiurl},
  87                 (defined $openid_error ? (openid_error => $openid_error) : ()),
  88                 (defined $openid_url ? (openid_url => $openid_url) : ()),
  89                 ($real_cgi_signin ? (nonopenidurl => IkiWiki::cgiurl(do => "signin")) : ()),
  90         );
  91
  92         IkiWiki::printheader($session);
  93         print IkiWiki::misctemplate("signin", $template->output);
  94         exit;
  95 }
  96
  97 sub formbuilder_setup (@) {
  98         my %params=@_;
  99
 100         my $form=$params{form};
 101         my $session=$params{session};
 102         my $cgi=$params{cgi};
 103
 104         if ($form->title eq "preferences" &&
 105                IkiWiki::openiduser($session->param("name"))) {
 106                 $form->field(name => "openid_identifier", disabled => 1,
 107                         label => htmllink("", "", "ikiwiki/OpenID", noimageinline => 1),
 108                         value => $session->param("name"),
 109                         size => 50, force => 1,
 110                         fieldset => "login");
 111                 $form->field(name => "email", type => "hidden");
 112         }
 113 }
 114
 115 sub validate ($$$;$) {
 116         my $q=shift;
 117         my $session=shift;
 118         my $openid_url=shift;
 119         my $errhandler=shift;
 120
 121         my $csr=getobj($q, $session);
 122
 123         my $claimed_identity = $csr->claimed_identity($openid_url);
 124         if (! $claimed_identity) {
 125                 if ($errhandler) {
 126                         $errhandler->($csr->err);
 127                         return 0;
 128                 }
 129                 else {
 130                         error($csr->err);
 131                 }
 132         }
 133
 134         # Ask for client to provide a name and email, if possible.
 135         # Try sreg and ax
 136         if ($claimed_identity->can("set_extension_args")) {
 137                 $claimed_identity->set_extension_args(
 138                         'http://openid.net/extensions/sreg/1.1',
 139                         {
 140                                 optional => 'email,fullname,nickname',
 141                         },
 142                 );
 143                 $claimed_identity->set_extension_args(
 144                         'http://openid.net/srv/ax/1.0',
 145                         {
 146                                 mode => 'fetch_request',
 147                                 'required' => 'email,fullname,nickname,firstname',
 148                                 'type.email' => "http://schema.openid.net/contact/email",
 149                                 'type.fullname' => "http://axschema.org/namePerson",
 150                                 'type.nickname' => "http://axschema.org/namePerson/friendly",
 151                                 'type.firstname' => "http://axschema.org/namePerson/first",
 152                         },
 153                 );
 154         }
 155
 156         my $check_url = $claimed_identity->check_url(
 157                 return_to => IkiWiki::cgiurl(do => "postsignin"),
 158                 trust_root => $config{cgiurl},
 159                 delayed_return => 1,
 160         );
 161         # Redirect the user to the OpenID server, which will
 162         # eventually bounce them back to auth()
 163         IkiWiki::redirect($q, $check_url);
 164         exit 0;
 165 }
 166
 167 sub auth ($$) {
 168         my $q=shift;
 169         my $session=shift;
 170
 171         if (defined $q->param('openid.mode')) {
 172                 my $csr=getobj($q, $session);
 173
 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, $config{url});
 179                 }
 180                 elsif (my $vident = $csr->verified_identity) {
 181                         $session->param(name => $vident->url);
 182
 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                         foreach my $ext (@extensions) {
 191                                 foreach my $field (qw{value.email email}) {
 192                                         if (exists $ext->{$field} &&
 193                                             defined $ext->{$field} &&
 194                                             length $ext->{$field}) {
 195                                                 $session->param(email => $ext->{$field});
 196                                                 last;
 197                                         }
 198                                 }
 199                                 foreach my $field (qw{value.nickname nickname value.fullname fullname value.firstname}) {
 200                                         if (exists $ext->{$field} &&
 201                                             defined $ext->{$field} &&
 202                                             length $ext->{$field}) {
 203                                                 $session->param(username => $ext->{$field});
 204                                                 last;
 205                                         }
 206                                 }
 207                         }
 208                 }
 209                 else {
 210                         error("OpenID failure: ".$csr->err);
 211                 }
 212         }
 213         elsif (defined $q->param('openid_identifier')) {
 214                 # myopenid.com affiliate support
 215                 validate($q, $session, $q->param('openid_identifier'));
 216         }
 217 }
 218
 219 sub getobj ($$) {
 220         my $q=shift;
 221         my $session=shift;
 222
 223         eval q{use Net::OpenID::Consumer};
 224         error($@) if $@;
 225
 226         my $ua;
 227         eval q{use LWPx::ParanoidAgent};
 228         if (! $@) {
 229                 $ua=LWPx::ParanoidAgent->new;
 230         }
 231         else {
 232                 $ua=LWP::UserAgent->new;
 233         }
 234
 235         # Store the secret in the session.
 236         my $secret=$session->param("openid_secret");
 237         if (! defined $secret) {
 238                 $secret=rand;
 239                 $session->param(openid_secret => $secret);
 240         }
 241
 242         return Net::OpenID::Consumer->new(
 243                 ua => $ua,
 244                 args => $q,
 245                 consumer_secret => sub { return shift()+$secret },
 246                 required_root => $config{cgiurl},
 247         );
 248 }
 249
 250 sub load_openid_module {
 251         # Give up if module is unavailable to avoid needing to depend on it.
 252         eval q{use Net::OpenID::Consumer};
 253         if ($@) {
 254                 debug("unable to load Net::OpenID::Consumer, not enabling OpenID login ($@)");
 255                 return;
 256         }
 257         return 1;
 258 }
 259
 260 1