ikiwiki/IkiWiki/Plugin/openid.pm

273 lines
6.6 KiB
Perl

#!/usr/bin/perl
# OpenID support.
package IkiWiki::Plugin::openid;
use warnings;
use strict;
use IkiWiki 3.00;
sub import {
add_underlay("openid-selector");
hook(type => "checkconfig", id => "openid", call => \&checkconfig);
hook(type => "getsetup", id => "openid", call => \&getsetup);
hook(type => "auth", id => "openid", call => \&auth);
hook(type => "formbuilder_setup", id => "openid",
call => \&formbuilder_setup, last => 1);
}
sub checkconfig () {
if ($config{cgi}) {
# Intercept normal signin form, so the openid selector
# can be displayed.
#
# When other auth hooks are registered, give the selector
# a reference to the normal signin form.
require IkiWiki::CGI;
my $real_cgi_signin;
if (keys %{$IkiWiki::hooks{auth}} > 1) {
$real_cgi_signin=\&IkiWiki::cgi_signin;
}
inject(name => "IkiWiki::cgi_signin", call => sub ($$) {
openid_selector($real_cgi_signin, @_);
});
}
}
sub getsetup () {
return
plugin => {
safe => 1,
rebuild => 0,
section => "auth",
},
openid_realm => {
type => "string",
description => "url pattern of openid realm (default is cgiurl)",
safe => 0,
rebuild => 0,
},
openid_cgiurl => {
type => "string",
description => "url to ikiwiki cgi to use for openid authentication (default is cgiurl)",
safe => 0,
rebuild => 0,
},
}
sub openid_selector {
my $real_cgi_signin=shift;
my $q=shift;
my $session=shift;
my $openid_url=$q->param('openid_identifier');
my $openid_error;
if (! load_openid_module()) {
if ($real_cgi_signin) {
$real_cgi_signin->($q, $session);
exit;
}
error(sprintf(gettext("failed to load openid module: "), @_));
}
elsif (defined $q->param("action") && $q->param("action") eq "verify") {
validate($q, $session, $openid_url, sub {
$openid_error=shift;
});
}
my $template=IkiWiki::template("openid-selector.tmpl");
$template->param(
cgiurl => $config{cgiurl},
(defined $openid_error ? (openid_error => $openid_error) : ()),
(defined $openid_url ? (openid_url => $openid_url) : ()),
($real_cgi_signin ? (nonopenidform => $real_cgi_signin->($q, $session, 1)) : ()),
);
IkiWiki::printheader($session);
print IkiWiki::misctemplate("signin", $template->output);
exit;
}
sub formbuilder_setup (@) {
my %params=@_;
my $form=$params{form};
my $session=$params{session};
my $cgi=$params{cgi};
if ($form->title eq "preferences" &&
IkiWiki::openiduser($session->param("name"))) {
$form->field(name => "openid_identifier", disabled => 1,
label => htmllink("", "", "ikiwiki/OpenID", noimageinline => 1),
value => $session->param("name"),
size => length($session->param("name")), force => 1,
fieldset => "login");
$form->field(name => "email", type => "hidden");
}
}
sub validate ($$$;$) {
my $q=shift;
my $session=shift;
my $openid_url=shift;
my $errhandler=shift;
my $csr=getobj($q, $session);
my $claimed_identity = $csr->claimed_identity($openid_url);
if (! $claimed_identity) {
if ($errhandler) {
$errhandler->($csr->err);
return 0;
}
else {
error($csr->err);
}
}
# Ask for client to provide a name and email, if possible.
# Try sreg and ax
if ($claimed_identity->can("set_extension_args")) {
$claimed_identity->set_extension_args(
'http://openid.net/extensions/sreg/1.1',
{
optional => 'email,fullname,nickname',
},
);
$claimed_identity->set_extension_args(
'http://openid.net/srv/ax/1.0',
{
mode => 'fetch_request',
'required' => 'email,fullname,nickname,firstname',
'type.email' => "http://schema.openid.net/contact/email",
'type.fullname' => "http://axschema.org/namePerson",
'type.nickname' => "http://axschema.org/namePerson/friendly",
'type.firstname' => "http://axschema.org/namePerson/first",
},
);
}
my $cgiurl=$config{openid_cgiurl};
$cgiurl=$config{cgiurl} if ! defined $cgiurl;
my $trust_root=$config{openid_realm};
$trust_root=$cgiurl if ! defined $trust_root;
my $check_url = $claimed_identity->check_url(
return_to => "$cgiurl?do=postsignin",
trust_root => $trust_root,
delayed_return => 1,
);
# Redirect the user to the OpenID server, which will
# eventually bounce them back to auth()
IkiWiki::redirect($q, $check_url);
exit 0;
}
sub auth ($$) {
my $q=shift;
my $session=shift;
if (defined $q->param('openid.mode')) {
my $csr=getobj($q, $session);
if (my $setup_url = $csr->user_setup_url) {
IkiWiki::redirect($q, $setup_url);
}
elsif ($csr->user_cancel) {
IkiWiki::redirect($q, $config{url});
}
elsif (my $vident = $csr->verified_identity) {
$session->param(name => $vident->url);
my @extensions;
if ($vident->can("signed_extension_fields")) {
@extensions=grep { defined } (
$vident->signed_extension_fields('http://openid.net/extensions/sreg/1.1'),
$vident->signed_extension_fields('http://openid.net/srv/ax/1.0'),
);
}
my $nickname;
foreach my $ext (@extensions) {
foreach my $field (qw{value.email email}) {
if (exists $ext->{$field} &&
defined $ext->{$field} &&
length $ext->{$field}) {
$session->param(email => $ext->{$field});
if (! defined $nickname &&
$ext->{$field}=~/(.+)@.+/) {
$nickname = $1;
}
last;
}
}
foreach my $field (qw{value.nickname nickname value.fullname fullname value.firstname}) {
if (exists $ext->{$field} &&
defined $ext->{$field} &&
length $ext->{$field}) {
$nickname=$ext->{$field};
last;
}
}
}
if (defined $nickname) {
$session->param(nickname =>
Encode::decode_utf8($nickname));
}
}
else {
error("OpenID failure: ".$csr->err);
}
}
elsif (defined $q->param('openid_identifier')) {
# myopenid.com affiliate support
validate($q, $session, $q->param('openid_identifier'));
}
}
sub getobj ($$) {
my $q=shift;
my $session=shift;
eval q{use Net::OpenID::Consumer};
error($@) if $@;
my $ua;
eval q{use LWPx::ParanoidAgent};
if (! $@) {
$ua=LWPx::ParanoidAgent->new;
}
else {
$ua=LWP::UserAgent->new;
}
# Store the secret in the session.
my $secret=$session->param("openid_secret");
if (! defined $secret) {
$secret=rand;
$session->param(openid_secret => $secret);
}
my $cgiurl=$config{openid_cgiurl};
$cgiurl=$config{cgiurl} if ! defined $cgiurl;
return Net::OpenID::Consumer->new(
ua => $ua,
args => $q,
consumer_secret => sub { return shift()+$secret },
required_root => $cgiurl,
);
}
sub load_openid_module {
# Give up if module is unavailable to avoid needing to depend on it.
eval q{use Net::OpenID::Consumer};
if ($@) {
debug("unable to load Net::OpenID::Consumer, not enabling OpenID login ($@)");
return;
}
return 1;
}
1