Merge commit 'upstream/master' into pub/master

[git.ikiwiki.info.git] / doc / plugins / contrib / unixauth.mdwn

diff --git a/doc/plugins/contrib/unixauth.mdwn b/doc/plugins/contrib/unixauth.mdwn
index 6cdf87f6a012e803d4c8d1ae466edbf59a923d90..d91ed45f1c791e7c7bf23a2912df2adae5b947fb 100644 (file)
--- a/doc/plugins/contrib/unixauth.mdwn
+++ b/doc/plugins/contrib/unixauth.mdwn
@@ -3,17 +3,37 @@
 
 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.
 
 
 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.
 

-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. Other checkpassword implementations are available, notably [checkpassword-pam](http://checkpasswd-pam.sourceforge.net/).
+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/).

 
 Config variables that affect the behavior of `unixauth`:
 
 * `unixauth_type`: defaults to unset, can be "checkpassword" or "pwauth"
 * `unixauth_command`: defaults to unset, should contain the full path and any arguments
 
 Config variables that affect the behavior of `unixauth`:
 
 * `unixauth_type`: defaults to unset, can be "checkpassword" or "pwauth"
 * `unixauth_command`: defaults to unset, should contain the full path and any arguments

-* `unixauth_sslrequire`: defaults to 1, can be 0
-* `sslcookie`: needs to be 1 if `unixauth_sslrequire` is 1 (perhaps this should be done automatically?)
+* `unixauth_requiressl`: defaults to 1, can be 0
+* `sslcookie`: needs to be 1 if `unixauth_requiressl` is 1 (perhaps this should be done automatically?)

 
 __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. ;-)
 
 
 __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. ;-)
 

+`unixauth` tests for the presence of the `HTTPS` environment variable. `Wrapper.pm` needs to be tweaked to pass it through; without that, the plugin fails closed.
+
+[[!toggle id="diff" text="Wrapper.pm.diff"]]
+
+[[!toggleable id="diff" text="""
+
+    --- Wrapper.pm.orig 2008-07-29 00:09:10.000000000 -0400
+    +++ Wrapper.pm
+    @@ -28,7 +28,7 @@ sub gen_wrapper () { #{{{
+        my @envsave;
+        push @envsave, qw{REMOTE_ADDR QUERY_STRING REQUEST_METHOD REQUEST_URI
+                       CONTENT_TYPE CONTENT_LENGTH GATEWAY_INTERFACE
+    -                  HTTP_COOKIE REMOTE_USER} if $config{cgi};
+    +                  HTTP_COOKIE REMOTE_USER HTTPS} if $config{cgi};
+        my $envsave="";
+        foreach my $var (@envsave) {
+                $envsave.=<<"EOF"
+
+"""]]
+

 [[!toggle id="code" text="unixauth.pm"]]
 
 [[!toggleable id="code" text="""
 [[!toggle id="code" text="unixauth.pm"]]
 
 [[!toggleable id="code" text="""


@@ -27,6 +47,7 @@ __Security__: [As with passwordauth](/security/#index14h2), be wary of sending u
     use IkiWiki 2.00;
     
     sub import { #{{{
     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",
             hook(type => "formbuilder_setup", id => "unixauth",
                 call => \&formbuilder_setup);
             hook(type => "formbuilder", id => "unixauth",


@@ -34,6 +55,36 @@ __Security__: [As with passwordauth](/security/#index14h2), be wary of sending u
         hook(type => "sessioncgi", id => "unixauth", call => \&sessioncgi);
     } # }}}
     
         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 ($$;$) { #{{{
         my $user=shift;
     # Checks if a string matches a user's password, and returns true or false.
     sub checkpassword ($$;$) { #{{{
         my $user=shift;


@@ -94,9 +145,10 @@ __Security__: [As with passwordauth](/security/#index14h2), be wary of sending u
         if (! exists $config{unixauth_requiressl}) {
                 $config{unixauth_requiressl} = 1;
         }
         if (! exists $config{unixauth_requiressl}) {
                 $config{unixauth_requiressl} = 1;
         }

-        if ($config{unixauth_requiressl} && \
-            (! $config{sslcookie} || ! exists $ENV{'HTTPS'})) {
-                die("SSL required to login. Contact your administrator.");
+        if ($config{unixauth_requiressl}) {
+            if ((! $config{sslcookie}) || (! exists $ENV{'HTTPS'})) {
+                die("SSL required to login. Contact your administrator.<br>");
+            }

         }
     
         if ($form->title eq "signin") {
         }
     
         if ($form->title eq "signin") {