ikiwiki/IkiWiki/Plugin/passwordauth.pm

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#!/usr/bin/perl
# Ikiwiki password authentication.
package IkiWiki::Plugin::passwordauth;
use warnings;
use strict;
use IkiWiki 3.00;
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sub import {
hook(type => "getsetup", id => "passwordauth", "call" => \&getsetup);
hook(type => "formbuilder_setup", id => "passwordauth", call => \&formbuilder_setup);
hook(type => "formbuilder", id => "passwordauth", call => \&formbuilder);
hook(type => "sessioncgi", id => "passwordauth", call => \&sessioncgi);
hook(type => "auth", id => "passwordauth", call => \&auth);
}
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sub getsetup () {
return
plugin => {
safe => 1,
rebuild => 0,
section => "auth",
},
account_creation_password => {
type => "string",
example => "s3cr1t",
description => "a password that must be entered when signing up for an account",
safe => 1,
rebuild => 0,
},
password_cost => {
type => "integer",
example => 8,
description => "cost of generating a password using Authen::Passphrase::BlowfishCrypt",
safe => 1,
rebuild => 0,
},
}
# 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 (@) {
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my %params=@_;
my $form=$params{form};
my $session=$params{session};
my $cgi=$params{cgi};
if ($form->title eq "signin" || $form->title eq "register" || $cgi->param("do") eq "register") {
$form->field(name => "name", required => 0);
$form->field(name => "password", type => "password", required => 0);
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if ($form->submitted eq "Register" || $form->submitted eq "Create Account" || $cgi->param("do") eq "register") {
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$form->field(name => "confirm_password", type => "password");
$form->field(name => "account_creation_password", type => "password")
if (defined $config{account_creation_password} &&
length $config{account_creation_password});
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$form->field(name => "email", size => 50);
$form->title("register");
$form->text("");
$form->field(name => "confirm_password",
validate => sub {
shift eq $form->field("password");
},
);
$form->field(name => "password",
validate => sub {
shift eq $form->field("confirm_password");
},
);
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}
if ($form->submitted) {
my $submittype=$form->submitted;
# Set required fields based on how form was submitted.
my %required=(
"Login" => [qw(name password)],
"Register" => [],
"Create Account" => [qw(name password confirm_password email)],
"Reset Password" => [qw(name)],
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);
foreach my $opt (@{$required{$submittype}}) {
$form->field(name => $opt, required => 1);
}
if ($submittype eq "Create Account") {
$form->field(
name => "account_creation_password",
validate => sub {
shift eq $config{account_creation_password};
},
required => 1,
) if (defined $config{account_creation_password} &&
length $config{account_creation_password});
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$form->field(
name => "email",
validate => "EMAIL",
);
}
# Validate password against name for Login.
if ($submittype eq "Login") {
$form->field(
name => "password",
validate => sub {
checkpassword($form->field("name"), shift);
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},
);
}
elsif ($submittype eq "Register" ||
$submittype eq "Create Account" ||
$submittype eq "Reset Password") {
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$form->field(name => "password", validate => 'VALUE');
}
# And make sure the entered name exists when logging
# in or sending email, and does not when registering.
if ($submittype eq 'Create Account' ||
$submittype eq 'Register') {
$form->field(
name => "name",
validate => sub {
my $name=shift;
length $name &&
$name=~/$config{wiki_file_regexp}/ &&
! IkiWiki::userinfo_get($name, "regdate");
},
);
}
elsif ($submittype eq "Login" ||
$submittype eq "Reset Password") {
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$form->field(
name => "name",
validate => sub {
my $name=shift;
length $name &&
IkiWiki::userinfo_get($name, "regdate");
},
);
}
}
else {
# First time settings.
$form->field(name => "name");
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if ($session->param("name")) {
$form->field(name => "name", value => $session->param("name"));
}
}
}
elsif ($form->title eq "preferences") {
my $user=$session->param("name");
if (! IkiWiki::openiduser($user)) {
$form->field(name => "name", disabled => 1,
value => $user, force => 1,
fieldset => "login");
$form->field(name => "password", type => "password",
fieldset => "login",
validate => sub {
shift eq $form->field("confirm_password");
});
$form->field(name => "confirm_password", type => "password",
fieldset => "login",
validate => sub {
shift eq $form->field("password");
});
my $userpage=IkiWiki::userpage($user);
if (exists $pagesources{$userpage}) {
$form->text(gettext("Your user page: ").
htmllink("", "", $userpage,
noimageinline => 1));
}
else {
$form->text("<a href=\"".
IkiWiki::cgiurl(do => "edit", page => $userpage).
"\">".gettext("Create your user page")."</a>");
}
}
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}
}
sub formbuilder (@) {
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my %params=@_;
my $form=$params{form};
my $session=$params{session};
my $cgi=$params{cgi};
my $buttons=$params{buttons};
if ($form->title eq "signin" || $form->title eq "register") {
if (($form->submitted && $form->validate) || $cgi->param("do") eq "register") {
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if ($form->submitted eq 'Login') {
$session->param("name", $form->field("name"));
IkiWiki::cgi_postsignin($cgi, $session);
}
elsif ($form->submitted eq 'Create Account') {
my $user_name=$form->field('name');
if (IkiWiki::userinfo_setall($user_name, {
'email' => $form->field('email'),
'regdate' => time})) {
setpassword($user_name, $form->field('password'));
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$form->field(name => "confirm_password", type => "hidden");
$form->field(name => "email", type => "hidden");
$form->text(gettext("Account creation successful. Now you can Login."));
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}
else {
error(gettext("Error creating account."));
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}
}
elsif ($form->submitted eq 'Reset Password') {
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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");
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my $template=template("passwordmail.tmpl");
$template->param(
user_name => $user_name,
passwordurl => IkiWiki::cgiurl(
'do' => "reset",
'name' => $user_name,
'token' => $token,
),
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wikiurl => $config{url},
wikiname => $config{wikiname},
REMOTE_ADDR => $ENV{REMOTE_ADDR},
);
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eval q{use Mail::Sendmail};
error($@) if $@;
sendmail(
To => IkiWiki::userinfo_get($user_name, "email"),
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From => "$config{wikiname} admin <".
(defined $config{adminemail} ? $config{adminemail} : "")
.">",
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Subject => "$config{wikiname} information",
Message => $template->output,
) or error(gettext("Failed to send mail"));
$form->text(gettext("You have been mailed password reset instructions."));
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$form->field(name => "name", required => 0);
push @$buttons, "Reset Password";
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}
elsif ($form->submitted eq "Register" || $cgi->param("do") eq "register") {
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@$buttons="Create Account";
}
}
elsif ($form->submitted eq "Create Account") {
@$buttons="Create Account";
}
else {
push @$buttons, "Register", "Reset Password";
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}
}
elsif ($form->title eq "preferences") {
if ($form->submitted eq "Save Preferences" && $form->validate) {
my $user_name=$form->field('name');
if ($form->field("password") && length $form->field("password")) {
setpassword($user_name, $form->field('password'));
}
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}
}
}
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sub sessioncgi ($$) {
my $q=shift;
my $session=shift;
if ($q->param('do') eq 'reset') {
my $name=$q->param("name");
my $token=$q->param("token");
if (! defined $name || ! defined $token ||
! length $name || ! length $token) {
error(gettext("incorrect password reset url"));
}
if (! checkpassword($name, $token, "resettoken")) {
error(gettext("password reset denied"));
}
$session->param("name", $name);
IkiWiki::cgi_prefs($q, $session);
exit;
}
elsif ($q->param("do") eq "register") {
# After registration, need to go somewhere, so show prefs page.
$session->param(postsignin => "do=prefs");
# Due to do=register, this will run in registration-only
# mode.
IkiWiki::cgi_signin($q, $session);
exit;
}
}
sub auth ($$) {
# While this hook is not currently used, it needs to exist
# so ikiwiki knows that the wiki supports logins, and will
# enable the Preferences page.
}
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