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| -rw-r--r-- | doc/plugins/contrib/unixauth.mdwn | 154 |
1 files changed, 154 insertions, 0 deletions
diff --git a/doc/plugins/contrib/unixauth.mdwn b/doc/plugins/contrib/unixauth.mdwn new file mode 100644 index 000000000..12f885c33 --- /dev/null +++ b/doc/plugins/contrib/unixauth.mdwn @@ -0,0 +1,154 @@ +[[!template id=plugin name=unixauth core=0 author="[[schmonz]]"]] +[[!tag type/auth]] + +This plugin authenticates users against the Unix user database. It presents a similar UI to [[plugins/passwordauth]], but simpler, as there's no need to be able to register or change one's password. + +[pwauth](http://www.unixpapa.com/pwauth/) must be installed and working. In particular, it must be configured to recognize the UID of the calling web server, or authentication will always fail. Set `pwauth_path` to the full path of your pwauth binary. + +As [with passwordauth](/security/#index14h2), be wary of sending usernames and passwords in cleartext. Unlike with passwordauth, sniffing these credentials can get an attacker much further than mere wiki access. SSL with this plugin is a __must__. + +[[!toggle id="code" text="unixauth.pm"]] + +[[!toggleable id="code" text=""" + + #!/usr/bin/perl + # Ikiwiki unixauth authentication. + package IkiWiki::Plugin::unixauth; + + use warnings; + use strict; + use IkiWiki 2.00; + + sub import { #{{{ + hook(type => "formbuilder_setup", id => "unixauth", + call => \&formbuilder_setup); + hook(type => "formbuilder", id => "unixauth", + call => \&formbuilder); + hook(type => "sessioncgi", id => "unixauth", call => \&sessioncgi); + } # }}} + + # 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{pwauth_path}) { + $config{pwauth_path}="/usr/libexec/pwauth"; + } + open PWAUTH, "|$config{pwauth_path}" or die("Could not run pwauth"); + print PWAUTH "$user\n$password\n"; + close PWAUTH; + $ret=!($?>>8); + + 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 ($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); + }, + ); + } + + 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 + +"""]] |