X-Git-Url: http://git.vanrenterghem.biz/git.ikiwiki.info.git/blobdiff_plain/c509834f011c082d39d5e3afa2f0f2c8d210f98e..713e114f132096c5aec01265ca9703708b47af4f:/doc/todo/require_CAPTCHA_to_edit.mdwn

diff --git a/doc/todo/require_CAPTCHA_to_edit.mdwn b/doc/todo/require_CAPTCHA_to_edit.mdwn
index 64f0a38d8..110b4167f 100644
--- a/doc/todo/require_CAPTCHA_to_edit.mdwn
+++ b/doc/todo/require_CAPTCHA_to_edit.mdwn
@@ -2,6 +2,8 @@ I don't necessarily trust all OpenID providers to stop bots.  I note that ikiwik
 
 I imagine a plugin that modifies the login screen to use <http://recaptcha.net/>.  You would then be required to fill in the captcha as well as log in in the normal way.
 
+-- [[users/Will]]
+
 > I hate CAPTCHAs with a passion. Someone else is welcome to write such a
 > plugin.
 >
@@ -23,6 +25,19 @@ I imagine a plugin that modifies the login screen to use <http://recaptcha.net/>
 >>> (Openid delegation makes it a bit harder than just looking at the
 >>> openid url though.) --[[Joey]]
 
+>>>> Well, OpenID only addresses authentication issues, not authorisation issues.
+>>>> Given that it is trivial to set up your own OpenID provider (a full provider, not
+>>>> just a forward to another provider), I can't see a
+>>>> blacklist working in the long term (it would be like blacklisting email).
+>>>> A whitelist might work (it would not be quite as bad as whitelisting email).  In any case,
+>>>> there is now a captcha plugin for those that want it.  It is accessible
+>>>> (there is an audio option) and serves a social purpose along with
+>>>> keeping bots out (the captcha is used to help digitise hard to read
+>>>> words in books for [Carnegie Mellon University](http://www.cs.cmu.edu/) and
+>>>> [The Internet Archive](http://www.archive.org/) ).  Finally, because the actual captcha is outsourced
+>>>> it means that someone else is taking care of keeping it ahead of
+>>>> the bot authors.
+
 Okie - I have a first pass of this.  There are still some issues.
 
 Currently the code verifies the CAPTCHA.  If you get it right then you're fine.
@@ -42,16 +57,7 @@ ignored.
 > This is still not fixed.  I would have thought the following patch would
 > have fixed this second issue, but it doesn't.
 
---- a/IkiWiki/Plugin/openid.pm
-+++ b/IkiWiki/Plugin/openid.pm
-@@ -61,6 +61,7 @@ sub formbuilder_setup (@) { #{{{
-                        # Skip all other required fields in this case.
-                        foreach my $field ($form->field) {
-                                next if $field eq "openid_url";
-+                               next if $field eq "recaptcha";
-                                $form->field(name => $field, required => 0,
-                                        validate => '/.*/');
-                        }
+(code snipped as a working [[patch]] is below)
 
 >> What seems to be happing here is that the openid plugin defines a
 >> validate hook for openid_url that calls validate(). validate() in turn
@@ -67,6 +73,61 @@ ignored.
 >> just flag it as invalid and let formbuilder handle that. Instead, you'd
 >> have to hack something in to redisplay the captcha by hand. --[[Joey]]
 
+>>> Fixed this.  I just modified the OpenID plugin to check if the captcha
+>>> succeeded or failed.  Seeing as the OpenID plugin is the one that is
+>>> abusing the normal validate method, I figured it was best to keep
+>>> the fix in the same place.  I also added a config switch so you can set if
+>>> the captcha is needed for OpenID logins. OpenID defaults to ignoring
+>>> the captcha.
+>>> Patch is inline below.
+>>> I think this whole thing is working now.
+
+>>>> Ok, glad it's working. Not thrilled that it needs to modify the
+>>>> openid plugin, especially as I'm not sure if i I will integrate the
+>>>> captcha plugin into mainline. Also because it's not very clean to have
+>>>> the oprnid plugin aware of another plugin like that. I'd like to
+>>>> prusue my idea of not doing the captcha validation in the validate
+>>>> hook.
+
+--- a/IkiWiki/Plugin/openid.pm
++++ b/IkiWiki/Plugin/openid.pm
+@@ -18,6 +18,7 @@ sub getopt () { #{{{
+ 	error($@) if $@;
+ 	Getopt::Long::Configure('pass_through');
+ 	GetOptions("openidsignup=s" => \$config{openidsignup});
++	GetOptions("openidneedscaptcha=s" => \$config{openidneedscaptcha});
+ } #}}}
+ 
+ sub formbuilder_setup (@) { #{{{
+@@ -61,6 +62,7 @@ sub formbuilder_setup (@) { #{{{
+ 			# Skip all other required fields in this case.
+ 			foreach my $field ($form->field) {
+ 				next if $field eq "openid_url";
++				next if $config{openidneedscaptcha} && $field eq "recaptcha";
+ 				$form->field(name => $field, required => 0,
+ 					validate => '/.*/');
+ 			}
+@@ -96,6 +98,18 @@ sub validate ($$$;$) { #{{{
+ 		}
+ 	}
+ 
++	if ($config{openidneedscaptcha} && defined $form->field("recaptcha")) {
++		foreach my $field ($form->field) {
++			next unless ($field eq "recaptcha");
++			if (! $field->validate) {
++				# if they didn't get the captcha right,
++				# then just claim we validated ok so the
++				# captcha can cause a fail
++				return 1;
++			}
++		}
++	}
++
+ 	my $check_url = $claimed_identity->check_url(
+ 		return_to => IkiWiki::cgiurl(do => "postsignin"),
+ 		trust_root => $config{cgiurl},
+
+
 Instructions
 =====
 
@@ -264,4 +325,3 @@ sub check_answer {
 }
 
 1;
-