--- /dev/null
+#!/usr/bin/perl
+# Ikiwiki unixauth authentication.
+package IkiWiki::Plugin::unixauth;
+
+use warnings;
+use strict;
+use IkiWiki 2.00;
+
+sub import {
+ hook(type => "getsetup", id => "unixauth", call => \&getsetup);
+ hook(type => "formbuilder_setup", id => "unixauth",
+ call => \&formbuilder_setup);
+ hook(type => "formbuilder", id => "unixauth",
+ call => \&formbuilder);
+ hook(type => "sessioncgi", id => "unixauth", call => \&sessioncgi);
+}
+
+sub getsetup () {
+ return
+ unixauth_type => {
+ type => "string",
+ example => "checkpassword",
+ description => "type of authenticator; can be 'checkpassword' or 'pwauth'",
+ safe => 0,
+ rebuild => 1,
+ },
+ unixauth_command => {
+ type => "string",
+ example => "/path/to/checkpassword",
+ description => "full path and any arguments",
+ safe => 0,
+ rebuild => 1,
+ },
+ unixauth_requiressl => {
+ type => "boolean",
+ example => "1",
+ description => "require SSL? strongly recommended",
+ safe => 0,
+ rebuild => 1,
+ },
+ plugin => {
+ description => "Unix user authentication",
+ safe => 0,
+ rebuild => 1,
+ },
+}
+
+# Checks if a string matches a user's password, and returns true or false.
+sub checkpassword ($$;$) {
+ my $user=shift;
+ my $password=shift;
+ my $field=shift || "password";
+
+ # It's very important that the user not be allowed to log in with
+ # an empty password!
+ if (! length $password) {
+ return 0;
+ }
+
+ my $ret=0;
+ if (! exists $config{unixauth_type}) {
+ # admin needs to carefully think over his configuration
+ return 0;
+ }
+ elsif ($config{unixauth_type} eq "checkpassword") {
+ open UNIXAUTH, "|$config{unixauth_command} true 3<&0" or die("Could not run $config{unixauth_type}");
+ print UNIXAUTH "$user\0$password\0Y123456\0";
+ close UNIXAUTH;
+ $ret=!($?>>8);
+ }
+ elsif ($config{unixauth_type} eq "pwauth") {
+ open UNIXAUTH, "|$config{unixauth_command}" or die("Could not run $config{unixauth_type}");
+ print UNIXAUTH "$user\n$password\n";
+ close UNIXAUTH;
+ $ret=!($?>>8);
+ }
+ else {
+ # no such authentication type
+ return 0;
+ }
+
+ if ($ret) {
+ my $userinfo=IkiWiki::userinfo_retrieve();
+ if (! length $user || ! defined $userinfo ||
+ ! exists $userinfo->{$user} || ! ref $userinfo->{$user}) {
+ IkiWiki::userinfo_setall($user, {
+ 'email' => '',
+ 'regdate' => time,
+ });
+ }
+ }
+
+ return $ret;
+}
+
+sub formbuilder_setup (@) {
+ my %params=@_;
+
+ my $form=$params{form};
+ my $session=$params{session};
+ my $cgi=$params{cgi};
+
+ # if not under SSL, die before even showing a login form,
+ # unless the admin explicitly says it's fine
+ if (! exists $config{unixauth_requiressl}) {
+ $config{unixauth_requiressl} = 1;
+ }
+ if ($config{unixauth_requiressl}) {
+ if ((! $config{sslcookie}) || (! exists $ENV{'HTTPS'})) {
+ die("SSL required to login. Contact your administrator.<br>");
+ }
+ }
+
+ if ($form->title eq "signin") {
+ $form->field(name => "name", required => 0);
+ $form->field(name => "password", type => "password", required => 0);
+
+ if ($form->submitted) {
+ my $submittype=$form->submitted;
+ # Set required fields based on how form was submitted.
+ my %required=(
+ "Login" => [qw(name password)],
+ );
+ foreach my $opt (@{$required{$submittype}}) {
+ $form->field(name => $opt, required => 1);
+ }
+
+ # Validate password against name for Login.
+ if ($submittype eq "Login") {
+ $form->field(
+ name => "password",
+ validate => sub {
+ checkpassword($form->field("name"), shift);
+ },
+ );
+ }
+
+ # XXX is this reachable? looks like no
+ elsif ($submittype eq "Login") {
+ $form->field(
+ name => "name",
+ validate => sub {
+ my $name=shift;
+ length $name &&
+ IkiWiki::userinfo_get($name, "regdate");
+ },
+ );
+ }
+ }
+ else {
+ # First time settings.
+ $form->field(name => "name");
+ if ($session->param("name")) {
+ $form->field(name => "name", value => $session->param("name"));
+ }
+ }
+ }
+ elsif ($form->title eq "preferences") {
+ $form->field(name => "name", disabled => 1,
+ value => $session->param("name"), force => 1,
+ fieldset => "login");
+ $form->field(name => "password", disabled => 1, type => "password",
+ fieldset => "login"),
+ }
+}
+
+sub formbuilder (@) {
+ my %params=@_;
+
+ my $form=$params{form};
+ my $session=$params{session};
+ my $cgi=$params{cgi};
+ my $buttons=$params{buttons};
+
+ if ($form->title eq "signin") {
+ if ($form->submitted && $form->validate) {
+ if ($form->submitted eq 'Login') {
+ $session->param("name", $form->field("name"));
+ IkiWiki::cgi_postsignin($cgi, $session);
+ }
+ }
+ }
+ elsif ($form->title eq "preferences") {
+ if ($form->submitted eq "Save Preferences" && $form->validate) {
+ my $user_name=$form->field('name');
+ }
+ }
+}
+
+sub sessioncgi ($$) {
+ my $q=shift;
+ my $session=shift;
+}
+
+1