aboutsummaryrefslogtreecommitdiff
path: root/IkiWiki/Plugin/openid.pm
blob: 7b1a17831f9155ea7034a528198ee864bb5cf6e4 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
#!/usr/bin/perl
# OpenID support.
package IkiWiki::Plugin::openid;

use warnings;
use strict;
use IkiWiki 3.00;

sub import {
	hook(type => "getopt", id => "openid", call => \&getopt);
	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 getopt () {
	eval q{use Getopt::Long};
	error($@) if $@;
	Getopt::Long::Configure('pass_through');
	GetOptions("openidsignup=s" => \$config{openidsignup});
}

sub getsetup () {
	return
		plugin => {
			safe => 1,
			rebuild => 0,
			section => "auth",
		},
		openidsignup => {
			type => "string",
			example => "http://myopenid.com/",
			description => "an url where users can signup for an OpenID",
			safe => 1,
			rebuild => 0,
		},
}

sub formbuilder_setup (@) {
	my %params=@_;

	my $form=$params{form};
	my $session=$params{session};
	my $cgi=$params{cgi};
	
	if ($form->title eq "signin") {
		# Give up if module is unavailable to avoid
		# needing to depend on it.
		eval q{use Net::OpenID::Consumer};
		if ($@) {
			debug("unable to load Net::OpenID::Consumer, not enabling OpenID login ($@)");
			return;
		}

		# This avoids it displaying a redundant label for the
		# OpenID fieldset.
		$form->fieldsets("OpenID");

		$form->field(
			name => "openid_url",
			label => gettext("Log in with")." ".htmllink("", "", "ikiwiki/OpenID", noimageinline => 1),
			fieldset => "OpenID",
			size => 30,
			comment => ($config{openidsignup} ? " | <a href=\"$config{openidsignup}\">".gettext("Get an OpenID")."</a>" : "")
		);

		# Handle submission of an OpenID as validation.
		if ($form->submitted && $form->submitted eq "Login" &&
		    defined $form->field("openid_url") && 
		    length $form->field("openid_url")) {
			$form->field(
				name => "openid_url",
				validate => sub {
					validate($cgi, $session, shift, $form);
				},
			);
			# Skip all other required fields in this case.
			foreach my $field ($form->field) {
				next if $field eq "openid_url";
				$form->field(name => $field, required => 0,
					validate => '/.*/');
			}
		}
	}
	elsif ($form->title eq "preferences" &&
	       IkiWiki::openiduser($session->param("name"))) {
		$form->field(name => "openid_url", disabled => 1,
			label => htmllink("", "", "ikiwiki/OpenID", noimageinline => 1),
			value => $session->param("name"), 
			size => 50, force => 1,
			fieldset => "login");
		$form->field(name => "email", type => "hidden");
	}
}

sub validate ($$$;$) {
	my $q=shift;
	my $session=shift;
	my $openid_url=shift;
	my $form=shift;

	my $csr=getobj($q, $session);

	my $claimed_identity = $csr->claimed_identity($openid_url);
	if (! $claimed_identity) {
		if ($form) {
			# Put the error in the form and fail validation.
			$form->field(name => "openid_url", comment => $csr->err);
			return 0;
		}
		else {
			error($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 $check_url = $claimed_identity->check_url(
		return_to => IkiWiki::cgiurl(do => "postsignin"),
		trust_root => $config{cgiurl},
		delayed_return => 1,
	);
	# Redirect the user to the OpenID server, which will
	# eventually bounce them back to auth()
	IkiWiki::redirect($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'),
				);
			}
			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});
						last;
					}
				}
				foreach my $field (qw{value.nickname nickname value.fullname fullname value.firstname}) {
					if (exists $ext->{$field} &&
					    defined $ext->{$field} &&
					    length $ext->{$field}) {
						$session->param(username => $ext->{$field});
						last;
					}
				}
			}
		}
		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);
	}

	return Net::OpenID::Consumer->new(
		ua => $ua,
		args => $q,
		consumer_secret => sub { return shift()+$secret },
		required_root => $config{cgiurl},
	);
}

1