major optimisation idea

[git.ikiwiki.info.git] / IkiWiki / Plugin / passwordauth.pm

diff --git a/IkiWiki/Plugin/passwordauth.pm b/IkiWiki/Plugin/passwordauth.pm
index ac955dc50fd703884d1c54dbf943d9c989c5e454..0cf2a26ea99380b6dd395824945bfcebd42c33b9 100644 (file)
--- a/IkiWiki/Plugin/passwordauth.pm
+++ b/IkiWiki/Plugin/passwordauth.pm
@@ -99,11 +99,71 @@ sub setpassword ($$;$) {
 
        # Setting the password clears any passwordless login token.
        if ($field ne 'passwordless') {
-               IkiWiki::userinfo_set($user, "cryptpasswordless", "");
                IkiWiki::userinfo_set($user, "passwordless", "");
        }
 }
 
+# Generates a token that can be used to log the user in.
+# This needs to be hard to guess. Generating a cgi session id will
+# make it as hard to guess as any cgi session.
+sub gentoken ($$;$) {
+       my $user=shift;
+       my $tokenfield=shift;
+       my $reversable=shift;
+
+       eval q{use CGI::Session};
+       error($@) if $@;
+       my $token = CGI::Session->new->id;
+       if (! $reversable) {
+               setpassword($user, $token, $tokenfield);
+       }
+       else {
+               IkiWiki::userinfo_set($user, $tokenfield, $token);
+       }
+       return $token;
+}
+
+# An anonymous user has no normal password, only a passwordless login
+# token. Given an email address, this sets up such a user for that email,
+# unless one already exists, and returns the username.
+sub anonuser ($) {
+       my $email=shift;
+
+       # Want a username for this email that won't overlap with any other.
+       my $user=$email;
+       $user=~s/@/_/g;
+
+       my $userinfo=IkiWiki::userinfo_retrieve();
+       if (! exists $userinfo->{$user} || ! ref $userinfo->{$user}) {
+               if (IkiWiki::userinfo_setall($user, {
+                       'email' => $email,
+                       'regdate' => time})) {
+                       gentoken($user, "passwordless", 1);
+                       return $user;
+               }
+               else {
+                       error(gettext("Error creating account."));
+               }
+       }
+       elsif (defined anonusertoken($userinfo->{$user})) {
+               return $user;
+       }
+       else {
+               return undef;
+       }
+}
+
+sub anonusertoken ($) {
+       my $userhash=shift;
+       if (exists $userhash->{passwordless} &&
+           length $userhash->{passwordless}) {
+               return $userhash->{passwordless};
+       }
+       else {
+               return undef;
+       }
+}
+
 sub formbuilder_setup (@) {
        my %params=@_;
 
@@ -283,15 +343,8 @@ sub formbuilder (@) {
                                if (! length $email) {
                                        error(gettext("No email address, so cannot email password reset instructions."));
                                }
-                               
-                               # Store a token that can be used once
-                               # to log the user in. This needs to be hard
-                               # to guess. Generating a cgi session id will
-                               # make it as hard to guess as any cgi session.
-                               eval q{use CGI::Session};
-                               error($@) if $@;
-                               my $token = CGI::Session->new->id;
-                               setpassword($user_name, $token, "resettoken");
+
+                               my $token=gentoken($user_name, "resettoken");
                                
                                my $template=template("passwordmail.tmpl");
                                $template->param(
@@ -362,6 +415,22 @@ sub sessioncgi ($$) {
                IkiWiki::cgi_prefs($q, $session);
                exit;
        }
+       elsif ($q->param('do') eq 'tokenauth') {
+               my $name=$q->param("name");
+               my $token=$q->param("token");
+
+               if (! defined $name || ! defined $token ||
+                   ! length $name  || ! length $token) {
+                       error(gettext("incorrect url"));
+               }
+               if (! checkpassword($name, $token, "passwordless")) {
+                       error(gettext("access denied"));
+               }
+
+               $session->param("name", $name);
+               IkiWiki::cgi_prefs($q, $session);
+               exit;
+       }
        elsif ($q->param("do") eq "register") {
                # After registration, need to go somewhere, so show prefs page.
                $session->param(postsignin => "do=prefs");