X-Git-Url: http://git.vanrenterghem.biz/git.ikiwiki.info.git/blobdiff_plain/12c5786df4e74c143f24398b8d0028000b61daba..9cee2962e01ef0538cc8498951867a543f91b47d:/doc/plugins/contrib/unixauth.mdwn

diff --git a/doc/plugins/contrib/unixauth.mdwn b/doc/plugins/contrib/unixauth.mdwn
index 12f885c33..c97312b59 100644
--- a/doc/plugins/contrib/unixauth.mdwn
+++ b/doc/plugins/contrib/unixauth.mdwn
@@ -1,154 +1,21 @@
 [[!template id=plugin name=unixauth core=0 author="[[schmonz]]"]]
 [[!tag type/auth]]
 
+[[!template id=gitbranch branch=unixauth author="[[schmonz]]"]]
+
 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.
+To authenticate, either [checkpassword](http://cr.yp.to/checkpwd.html) or [pwauth](http://www.unixpapa.com/pwauth/) must be installed and configured. `checkpassword` is strongly preferred. If your web server runs as an unprivileged user -- as it darn well should! -- then `checkpassword` needs to be setuid root. (Or your ikiwiki CGI wrapper, I guess, but don't do that.) Other checkpassword implementations are available, notably [checkpassword-pam](http://checkpasswd-pam.sourceforge.net/).
 
-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__.
+Config variables that affect the behavior of `unixauth`:
 
-[[!toggle id="code" text="unixauth.pm"]]
+* `unixauth_type`: defaults to unset, can be "checkpassword" or "pwauth"
+* `unixauth_command`: defaults to unset, should contain the full path and any arguments
+* `unixauth_requiressl`: defaults to 1, can be 0
+* `sslcookie`: needs to be 1 if `unixauth_requiressl` is 1 (perhaps this should be done automatically?)
 
-[[!toggleable id="code" text="""
+__Security__: [As with passwordauth](/security/#index14h2), be wary of sending usernames and passwords in cleartext. Unlike passwordauth, sniffing `unixauth` credentials can get an attacker much further than mere wiki access. Therefore, this plugin defaults to not even _displaying_ the login form fields unless we're running under SSL. Nobody should be able to do anything remotely dumb until the admin has done at least a little thinking. After that, dumb things are always possible. ;-)
 
-    #!/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
+`unixauth` needs the `HTTPS` environment variable, available in ikiwiki 2.67 or later (fixed in #[502047](http://bugs.debian.org/502047)), without which it fails closed.
 
-"""]]
+The plugin has not been tested with newer versions of ikiwiki. [[schmonz]] hopes to have time to polish this plugin soon.