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[ikiwiki.git] / IkiWiki / Plugin / passwordauth.pm
index b61e6c86e1b118c5baeb852de95a187dc39de854..f3f1aa4bf2b7b5f761859d7a75a2c0d68f8b4eb7 100644 (file)
@@ -11,8 +11,70 @@ sub import { #{{{
                call => \&formbuilder_setup);
         hook(type => "formbuilder", id => "passwordauth",
                call => \&formbuilder);
+       hook(type => "sessioncgi", id => "passwordauth", call => \&sessioncgi);
 } # }}}
 
+# Checks if a string matches a user's password, and returns true or false.
+sub checkpassword ($$;$) { #{{{
+       my $user=shift;
+       my $password=shift;
+       my $field=shift || "password";
+
+       # It's very important that the user not be allowed to log in with
+       # an empty password!
+       if (! length $password) {
+               return 0;
+       }
+
+       my $userinfo=IkiWiki::userinfo_retrieve();
+       if (! length $user || ! defined $userinfo ||
+           ! exists $userinfo->{$user} || ! ref $userinfo->{$user}) {
+               return 0;
+       }
+
+       my $ret=0;
+       if (exists $userinfo->{$user}->{"crypt".$field}) {
+               eval q{use Authen::Passphrase};
+               error $@ if $@;
+               my $p = Authen::Passphrase->from_crypt($userinfo->{$user}->{"crypt".$field});
+               $ret=$p->match($password);
+       }
+       elsif (exists $userinfo->{$user}->{$field}) {
+               $ret=$password eq $userinfo->{$user}->{$field};
+       }
+
+       if ($ret &&
+           (exists $userinfo->{$user}->{resettoken} ||
+            exists $userinfo->{$user}->{cryptresettoken})) {
+               # Clear reset token since the user has successfully logged in.
+               delete $userinfo->{$user}->{resettoken};
+               delete $userinfo->{$user}->{cryptresettoken};
+               IkiWiki::userinfo_store($userinfo);
+       }
+
+       return $ret;
+} #}}}
+
+sub setpassword ($$;$) { #{{{
+       my $user=shift;
+       my $password=shift;
+       my $field=shift || "password";
+
+       eval q{use Authen::Passphrase::BlowfishCrypt};
+       if (! $@) {
+               my $p = Authen::Passphrase::BlowfishCrypt->new(
+                       cost => $config{password_cost} || 8,
+                       salt_random => 1,
+                       passphrase => $password,
+               );
+               IkiWiki::userinfo_set($user, "crypt$field", $p->as_crypt);
+               IkiWiki::userinfo_set($user, $field, "");
+       }
+       else {
+               IkiWiki::userinfo_set($user, $field, $password);
+       }
+} #}}}
+
 sub formbuilder_setup (@) { #{{{
        my %params=@_;
 
@@ -50,7 +112,7 @@ sub formbuilder_setup (@) { #{{{
                                "Login" => [qw(name password)],
                                "Register" => [],
                                "Create Account" => [qw(name password confirm_password email)],
-                               "Mail Password" => [qw(name)],
+                               "Reset Password" => [qw(name)],
                        );
                        foreach my $opt (@{$required{$submittype}}) {
                                $form->field(name => $opt, required => 1);
@@ -75,14 +137,13 @@ sub formbuilder_setup (@) { #{{{
                                $form->field(
                                        name => "password",
                                        validate => sub {
-                                               length $form->field("name") &&
-                                               shift eq IkiWiki::userinfo_get($form->field("name"), 'password');
+                                               checkpassword($form->field("name"), shift);
                                        },
                                );
                        }
                        elsif ($submittype eq "Register" ||
                               $submittype eq "Create Account" ||
-                              $submittype eq "Mail Password") {
+                              $submittype eq "Reset Password") {
                                $form->field(name => "password", validate => 'VALUE');
                        }
                        
@@ -101,7 +162,7 @@ sub formbuilder_setup (@) { #{{{
                                );
                        }
                        elsif ($submittype eq "Login" ||
-                              $submittype eq "Mail Password") {
+                              $submittype eq "Reset Password") {
                                $form->field( 
                                        name => "name",
                                        validate => sub {
@@ -155,8 +216,8 @@ sub formbuilder (@) { #{{{
                                my $user_name=$form->field('name');
                                if (IkiWiki::userinfo_setall($user_name, {
                                        'email' => $form->field('email'),
-                                       'password' => $form->field('password'),
                                        'regdate' => time})) {
+                                       setpassword($user_name, $form->field('password'));
                                        $form->field(name => "confirm_password", type => "hidden");
                                        $form->field(name => "email", type => "hidden");
                                        $form->text(gettext("Account creation successful. Now you can Login."));
@@ -165,17 +226,35 @@ sub formbuilder (@) { #{{{
                                        error(gettext("Error creating account."));
                                }
                        }
-                       elsif ($form->submitted eq 'Mail Password') {
+                       elsif ($form->submitted eq 'Reset Password') {
                                my $user_name=$form->field("name");
+                               my $email=IkiWiki::userinfo_get($user_name, "email");
+                               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 $template=template("passwordmail.tmpl");
                                $template->param(
                                        user_name => $user_name,
-                                       user_password => IkiWiki::userinfo_get($user_name, "password"),
+                                       passwordurl => IkiWiki::cgiurl(
+                                               'do' => "reset",
+                                               'name' => $user_name,
+                                               'token' => $token,
+                                       ),
                                        wikiurl => $config{url},
                                        wikiname => $config{wikiname},
                                        REMOTE_ADDR => $ENV{REMOTE_ADDR},
                                );
-                       
+                               
                                eval q{use Mail::Sendmail};
                                error($@) if $@;
                                sendmail(
@@ -184,10 +263,10 @@ sub formbuilder (@) { #{{{
                                        Subject => "$config{wikiname} information",
                                        Message => $template->output,
                                ) or error(gettext("Failed to send mail"));
-                       
-                               $form->text(gettext("Your password has been emailed to you."));
+                               
+                               $form->text(gettext("You have been mailed password reset instructions."));
                                $form->field(name => "name", required => 0);
-                               push @$buttons, "Mail Password";
+                               push @$buttons, "Reset Password";
                        }
                        elsif ($form->submitted eq "Register") {
                                @$buttons="Create Account";
@@ -197,23 +276,39 @@ sub formbuilder (@) { #{{{
                        @$buttons="Create Account";
                }
                else {
-                       push @$buttons, "Register", "Mail Password";
+                       push @$buttons, "Register", "Reset Password";
                }
        }
        elsif ($form->title eq "preferences") {
                if ($form->submitted eq "Save Preferences" && $form->validate) {
                        my $user_name=$form->field('name');
-                       foreach my $field (qw(password)) {
-                               if (defined $form->field($field) && length $form->field($field)) {
-                                       IkiWiki::userinfo_set($user_name, $field, $form->field($field)) ||
-                                               error("failed to set $field");
-                               }
-                       }
+                       if ($form->field("password") && length $form->field("password")) {
+                               setpassword($user_name, $form->field('password'));
+                       }
                }
        }
-       
-       IkiWiki::printheader($session);
-       print IkiWiki::misctemplate($form->title, $form->render(submit => $buttons));
+} #}}}
+
+sub sessioncgi ($$) { #{{{
+       my $q=shift;
+       my $session=shift;
+
+       if ($q->param('do') eq 'reset') {
+               my $name=$q->param("name");
+               my $token=$q->param("token");
+
+               if (! defined $name || ! defined $token ||
+                   ! length $name  || ! length $token) {
+                       error(gettext("incorrect password reset url"));
+               }
+               if (! checkpassword($name, $token, "resettoken")) {
+                       error(gettext("password reset denied"));
+               }
+
+               $session->param("name", $name);
+               IkiWiki::cgi_prefs($q, $session);
+               exit;
+       }
 } #}}}
 
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