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 2.00;
   8
   9 sub import { #{{{
  10         hook(type => "getopt", id => "openid", call => \&getopt);
  11         hook(type => "auth", id => "openid", call => \&auth);
  12         hook(type => "formbuilder_setup", id => "openid",
  13                 call => \&formbuilder_setup, last => 1);
  14 } # }}}
  15
  16 sub getopt () { #{{{
  17         eval q{use Getopt::Long};
  18         error($@) if $@;
  19         Getopt::Long::Configure('pass_through');
  20         GetOptions("openidsignup=s" => \$config{openidsignup});
  21 } #}}}
  22
  23 sub formbuilder_setup (@) { #{{{
  24         my %params=@_;
  25
  26         my $form=$params{form};
  27         my $session=$params{session};
  28         my $cgi=$params{cgi};
  29
  30         # Give up if module is unavailable to avoid needing to depend on
  31         # it.
  32         eval q{use Net::OpenID::Consumer};
  33         if ($@) {
  34                 debug("unable to load Net::OpenID::Consumer, not enabling OpenID login");
  35                 return;
  36         }
  37
  38         if ($form->title eq "signin") {
  39                 # This avoids it displaying a redundant label for the
  40                 # OpenID fieldset.
  41                 $form->fieldsets("OpenID");
  42
  43                 $form->field(
  44                         name => "openid_url",
  45                         label => gettext("Log in with")." ".htmllink("", "", "OpenID", noimageinline => 1),
  46                         fieldset => "OpenID",
  47                         size => 30,
  48                         comment => ($config{openidsignup} ? " | <a href=\"$config{openidsignup}\">".gettext("Get an OpenID")."</a>" : "")
  49                 );
  50
  51                 # Handle submission of an OpenID as validation.
  52                 if ($form->submitted && $form->submitted eq "Login" &&
  53                     defined $form->field("openid_url") &&
  54                     length $form->field("openid_url")) {
  55                         $form->field(
  56                                 name => "openid_url",
  57                                 validate => sub {
  58                                         validate($cgi, $session, shift, $form);
  59                                 },
  60                         );
  61                         # Skip all other required fields in this case.
  62                         foreach my $field ($form->field) {
  63                                 next if $field eq "openid_url";
  64                                 $form->field(name => $field, required => 0,
  65                                         validate => '/.*/');
  66                         }
  67                 }
  68         }
  69         elsif ($form->title eq "preferences") {
  70                 if (! defined $form->field(name => "name")) {
  71                         $form->field(name => "OpenID", disabled => 1,
  72                                 value => $session->param("name"),
  73                                 size => 50, force => 1,
  74                                 fieldset => "login");
  75                 }
  76         }
  77 }
  78
  79 sub validate ($$$;$) { #{{{
  80         my $q=shift;
  81         my $session=shift;
  82         my $openid_url=shift;
  83         my $form=shift;
  84
  85         my $csr=getobj($q, $session);
  86
  87         my $claimed_identity = $csr->claimed_identity($openid_url);
  88         if (! $claimed_identity) {
  89                 if ($form) {
  90                         # Put the error in the form and fail validation.
  91                         $form->field(name => "openid_url", comment => $csr->err);
  92                         return 0;
  93                 }
  94                 else {
  95                         error($csr->err);
  96                 }
  97         }
  98
  99         my $check_url = $claimed_identity->check_url(
 100                 return_to => IkiWiki::cgiurl(do => "postsignin"),
 101                 trust_root => $config{cgiurl},
 102                 delayed_return => 1,
 103         );
 104         # Redirect the user to the OpenID server, which will
 105         # eventually bounce them back to auth()
 106         IkiWiki::redirect($q, $check_url);
 107         exit 0;
 108 } #}}}
 109
 110 sub auth ($$) { #{{{
 111         my $q=shift;
 112         my $session=shift;
 113
 114         if (defined $q->param('openid.mode')) {
 115                 my $csr=getobj($q, $session);
 116
 117                 if (my $setup_url = $csr->user_setup_url) {
 118                         IkiWiki::redirect($q, $setup_url);
 119                 }
 120                 elsif ($csr->user_cancel) {
 121                         IkiWiki::redirect($q, $config{url});
 122                 }
 123                 elsif (my $vident = $csr->verified_identity) {
 124                         $session->param(name => $vident->url);
 125                 }
 126                 else {
 127                         error("OpenID failure: ".$csr->err);
 128                 }
 129         }
 130         elsif (defined $q->param('openid_identifier')) {
 131                 # myopenid.com affiliate support
 132                 validate($q, $session, $q->param('openid_identifier'));
 133         }
 134 } #}}}
 135
 136 sub getobj ($$) { #{{{
 137         my $q=shift;
 138         my $session=shift;
 139
 140         eval q{use Net::OpenID::Consumer};
 141         error($@) if $@;
 142
 143         my $ua;
 144         eval q{use LWPx::ParanoidAgent};
 145         if (! $@) {
 146                 $ua=LWPx::ParanoidAgent->new;
 147         }
 148         else {
 149                 $ua=LWP::UserAgent->new;
 150         }
 151
 152         # Store the secret in the session.
 153         my $secret=$session->param("openid_secret");
 154         if (! defined $secret) {
 155                 $secret=rand;
 156                 $session->param(openid_secret => $secret);
 157         }
 158
 159         return Net::OpenID::Consumer->new(
 160                 ua => $ua,
 161                 args => $q,
 162                 consumer_secret => sub { return shift()+$secret },
 163                 required_root => $config{cgiurl},
 164         );
 165 } #}}}
 166
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