IkiWiki/Plugin/passwordauth.pm

   1 #!/usr/bin/perl
   2 # Ikiwiki password authentication.
   3 package IkiWiki::Plugin::passwordauth;
   4
   5 use warnings;
   6 use strict;
   7 use IkiWiki 3.00;
   8
   9 sub import {
  10         hook(type => "getsetup", id => "passwordauth", "call" => \&getsetup);
  11         hook(type => "formbuilder_setup", id => "passwordauth", call => \&formbuilder_setup);
  12         hook(type => "formbuilder", id => "passwordauth", call => \&formbuilder);
  13         hook(type => "sessioncgi", id => "passwordauth", call => \&sessioncgi);
  14         hook(type => "auth", id => "passwordauth", call => \&auth);
  15 }
  16
  17 sub getsetup () {
  18         return
  19                 plugin => {
  20                         safe => 1,
  21                         rebuild => 0,
  22                         section => "auth",
  23                 },
  24                 account_creation_password => {
  25                         type => "string",
  26                         example => "s3cr1t",
  27                         description => "a password that must be entered when signing up for an account",
  28                         safe => 1,
  29                         rebuild => 0,
  30                 },
  31                 password_cost => {
  32                         type => "integer",
  33                         example => 8,
  34                         description => "cost of generating a password using Authen::Passphrase::BlowfishCrypt",
  35                         safe => 1,
  36                         rebuild => 0,
  37                 },
  38 }
  39
  40 # Checks if a string matches a user's password, and returns true or false.
  41 sub checkpassword ($$;$) {
  42         my $user=shift;
  43         my $password=shift;
  44         my $field=shift || "password";
  45
  46         # It's very important that the user not be allowed to log in with
  47         # an empty password!
  48         if (! length $password) {
  49                 return 0;
  50         }
  51
  52         my $userinfo=IkiWiki::userinfo_retrieve();
  53         if (! length $user || ! defined $userinfo ||
  54             ! exists $userinfo->{$user} || ! ref $userinfo->{$user}) {
  55                 return 0;
  56         }
  57
  58         my $ret=0;
  59         if (exists $userinfo->{$user}->{"crypt".$field}) {
  60                 eval q{use Authen::Passphrase};
  61                 error $@ if $@;
  62                 my $p = Authen::Passphrase->from_crypt($userinfo->{$user}->{"crypt".$field});
  63                 $ret=$p->match($password);
  64         }
  65         elsif (exists $userinfo->{$user}->{$field}) {
  66                 $ret=$password eq $userinfo->{$user}->{$field};
  67         }
  68
  69         if ($ret &&
  70             (exists $userinfo->{$user}->{resettoken} ||
  71              exists $userinfo->{$user}->{cryptresettoken})) {
  72                 # Clear reset token since the user has successfully logged in.
  73                 delete $userinfo->{$user}->{resettoken};
  74                 delete $userinfo->{$user}->{cryptresettoken};
  75                 IkiWiki::userinfo_store($userinfo);
  76         }
  77
  78         return $ret;
  79 }
  80
  81 sub setpassword ($$;$) {
  82         my $user=shift;
  83         my $password=shift;
  84         my $field=shift || "password";
  85
  86         eval q{use Authen::Passphrase::BlowfishCrypt};
  87         if (! $@) {
  88                 my $p = Authen::Passphrase::BlowfishCrypt->new(
  89                         cost => $config{password_cost} || 8,
  90                         salt_random => 1,
  91                         passphrase => $password,
  92                 );
  93                 IkiWiki::userinfo_set($user, "crypt$field", $p->as_crypt);
  94                 IkiWiki::userinfo_set($user, $field, "");
  95         }
  96         else {
  97                 IkiWiki::userinfo_set($user, $field, $password);
  98         }
  99
 100         # Setting the password clears any passwordless login token.
 101         if ($field ne 'passwordless') {
 102                 IkiWiki::userinfo_set($user, "cryptpasswordless", "");
 103                 IkiWiki::userinfo_set($user, "passwordless", "");
 104         }
 105 }
 106
 107 sub formbuilder_setup (@) {
 108         my %params=@_;
 109
 110         my $form=$params{form};
 111         my $session=$params{session};
 112         my $cgi=$params{cgi};
 113
 114         my $do_register=defined $cgi->param("do") && $cgi->param("do") eq "register";
 115
 116         if ($form->title eq "signin" || $form->title eq "register" || $do_register) {
 117                 $form->field(name => "name", required => 0);
 118                 $form->field(name => "password", type => "password", required => 0);
 119
 120                 if ($form->submitted eq "Register" || $form->submitted eq "Create Account" || $do_register) {
 121                         $form->field(name => "confirm_password", type => "password");
 122                         $form->field(name => "account_creation_password", type => "password")
 123                                  if (defined $config{account_creation_password} &&
 124                                      length $config{account_creation_password});
 125                         $form->field(name => "email", size => 50);
 126                         $form->title("register");
 127                         $form->text("");
 128
 129                         $form->field(name => "confirm_password",
 130                                 validate => sub {
 131                                         shift eq $form->field("password");
 132                                 },
 133                         );
 134                         $form->field(name => "password",
 135                                 validate => sub {
 136                                         shift eq $form->field("confirm_password");
 137                                 },
 138                         );
 139                 }
 140
 141                 if ($form->submitted) {
 142                         my $submittype=$form->submitted;
 143                         # Set required fields based on how form was submitted.
 144                         my %required=(
 145                                 "Login" => [qw(name password)],
 146                                 "Register" => [],
 147                                 "Create Account" => [qw(name password confirm_password email)],
 148                                 "Reset Password" => [qw(name)],
 149                         );
 150                         foreach my $opt (@{$required{$submittype}}) {
 151                                 $form->field(name => $opt, required => 1);
 152                         }
 153
 154                         if ($submittype eq "Create Account") {
 155                                 $form->field(
 156                                         name => "account_creation_password",
 157                                         validate => sub {
 158                                                 shift eq $config{account_creation_password};
 159                                         },
 160                                         required => 1,
 161                                 ) if (defined $config{account_creation_password} &&
 162                                       length $config{account_creation_password});
 163                                 $form->field(
 164                                         name => "email",
 165                                         validate => "EMAIL",
 166                                 );
 167                         }
 168
 169                         # Validate password against name for Login.
 170                         if ($submittype eq "Login") {
 171                                 $form->field(
 172                                         name => "password",
 173                                         validate => sub {
 174                                                 checkpassword($form->field("name"), shift);
 175                                         },
 176                                 );
 177                         }
 178                         elsif ($submittype eq "Register" ||
 179                                $submittype eq "Create Account" ||
 180                                $submittype eq "Reset Password") {
 181                                 $form->field(name => "password", validate => 'VALUE');
 182                         }
 183
 184                         # And make sure the entered name exists when logging
 185                         # in or sending email, and does not when registering.
 186                         if ($submittype eq 'Create Account' ||
 187                             $submittype eq 'Register') {
 188                                 $form->field(
 189                                         name => "name",
 190                                         validate => sub {
 191                                                 my $name=shift;
 192                                                 length $name &&
 193                                                 $name=~/$config{wiki_file_regexp}/ &&
 194                                                 ! IkiWiki::userinfo_get($name, "regdate");
 195                                         },
 196                                 );
 197                         }
 198                         elsif ($submittype eq "Login" ||
 199                                $submittype eq "Reset Password") {
 200                                 $form->field(
 201                                         name => "name",
 202                                         validate => sub {
 203                                                 my $name=shift;
 204                                                 length $name &&
 205                                                 IkiWiki::userinfo_get($name, "regdate");
 206                                         },
 207                                 );
 208                         }
 209                 }
 210                 else {
 211                         # First time settings.
 212                         $form->field(name => "name");
 213                         if ($session->param("name")) {
 214                                 $form->field(name => "name", value => $session->param("name"));
 215                         }
 216                 }
 217         }
 218         elsif ($form->title eq "preferences") {
 219                 my $user=$session->param("name");
 220                 if (! IkiWiki::openiduser($user)) {
 221                         $form->field(name => "name", disabled => 1,
 222                                 value => $user, force => 1,
 223                                 fieldset => "login");
 224                         $form->field(name => "password", type => "password",
 225                                 fieldset => "login",
 226                                 validate => sub {
 227                                         shift eq $form->field("confirm_password");
 228                                 });
 229                         $form->field(name => "confirm_password", type => "password",
 230                                 fieldset => "login",
 231                                 validate => sub {
 232                                         shift eq $form->field("password");
 233                                 });
 234
 235                         my $userpage=IkiWiki::userpage($user);
 236                         if (exists $pagesources{$userpage}) {
 237                                 $form->text(gettext("Your user page: ").
 238                                         htmllink("", "", $userpage,
 239                                                 noimageinline => 1));
 240                         }
 241                         else {
 242                                 $form->text("<a href=\"".
 243                                         IkiWiki::cgiurl(do => "edit", page => $userpage).
 244                                         "\">".gettext("Create your user page")."</a>");
 245                         }
 246                 }
 247         }
 248 }
 249
 250 sub formbuilder (@) {
 251         my %params=@_;
 252
 253         my $form=$params{form};
 254         my $session=$params{session};
 255         my $cgi=$params{cgi};
 256         my $buttons=$params{buttons};
 257
 258         my $do_register=defined $cgi->param("do") && $cgi->param("do") eq "register";
 259
 260         if ($form->title eq "signin" || $form->title eq "register") {
 261                 if (($form->submitted && $form->validate) || $do_register) {
 262                         if ($form->submitted eq 'Login') {
 263                                 $session->param("name", $form->field("name"));
 264                                 IkiWiki::cgi_postsignin($cgi, $session);
 265                         }
 266                         elsif ($form->submitted eq 'Create Account') {
 267                                 my $user_name=$form->field('name');
 268                                 if (IkiWiki::userinfo_setall($user_name, {
 269                                         'email' => $form->field('email'),
 270                                         'regdate' => time})) {
 271                                         setpassword($user_name, $form->field('password'));
 272                                         $form->field(name => "confirm_password", type => "hidden");
 273                                         $form->field(name => "email", type => "hidden");
 274                                         $form->text(gettext("Account creation successful. Now you can Login."));
 275                                 }
 276                                 else {
 277                                         error(gettext("Error creating account."));
 278                                 }
 279                         }
 280                         elsif ($form->submitted eq 'Reset Password') {
 281                                 my $user_name=$form->field("name");
 282                                 my $email=IkiWiki::userinfo_get($user_name, "email");
 283                                 if (! length $email) {
 284                                         error(gettext("No email address, so cannot email password reset instructions."));
 285                                 }
 286
 287                                 # Store a token that can be used once
 288                                 # to log the user in. This needs to be hard
 289                                 # to guess. Generating a cgi session id will
 290                                 # make it as hard to guess as any cgi session.
 291                                 eval q{use CGI::Session};
 292                                 error($@) if $@;
 293                                 my $token = CGI::Session->new->id;
 294                                 setpassword($user_name, $token, "resettoken");
 295
 296                                 my $template=template("passwordmail.tmpl");
 297                                 $template->param(
 298                                         user_name => $user_name,
 299                                         passwordurl => IkiWiki::cgiurl_abs(
 300                                                 'do' => "reset",
 301                                                 'name' => $user_name,
 302                                                 'token' => $token,
 303                                         ),
 304                                         wikiurl => $config{url},
 305                                         wikiname => $config{wikiname},
 306                                         remote_addr => $session->remote_addr(),
 307                                 );
 308
 309                                 eval q{use Mail::Sendmail};
 310                                 error($@) if $@;
 311                                 sendmail(
 312                                         To => IkiWiki::userinfo_get($user_name, "email"),
 313                                         From => "$config{wikiname} admin <".
 314                                                 (defined $config{adminemail} ? $config{adminemail} : "")
 315                                                 .">",
 316                                         Subject => "$config{wikiname} information",
 317                                         Message => $template->output,
 318                                 ) or error(gettext("Failed to send mail"));
 319
 320                                 $form->text(gettext("You have been mailed password reset instructions."));
 321                                 $form->field(name => "name", required => 0);
 322                                 push @$buttons, "Reset Password";
 323                         }
 324                         elsif ($form->submitted eq "Register" || $do_register) {
 325                                 @$buttons="Create Account";
 326                         }
 327                 }
 328                 elsif ($form->submitted eq "Create Account") {
 329                         @$buttons="Create Account";
 330                 }
 331                 else {
 332                         push @$buttons, "Register", "Reset Password";
 333                 }
 334         }
 335         elsif ($form->title eq "preferences") {
 336                 if ($form->submitted eq "Save Preferences" && $form->validate) {
 337                         my $user_name=$form->field('name');
 338                         if (defined $form->field("password") && length $form->field("password")) {
 339                                 setpassword($user_name, $form->field('password'));
 340                         }
 341                 }
 342         }
 343 }
 344
 345 sub sessioncgi ($$) {
 346         my $q=shift;
 347         my $session=shift;
 348
 349         if ($q->param('do') eq 'reset') {
 350                 my $name=$q->param("name");
 351                 my $token=$q->param("token");
 352
 353                 if (! defined $name || ! defined $token ||
 354                     ! length $name  || ! length $token) {
 355                         error(gettext("incorrect password reset url"));
 356                 }
 357                 if (! checkpassword($name, $token, "resettoken")) {
 358                         error(gettext("password reset denied"));
 359                 }
 360
 361                 $session->param("name", $name);
 362                 IkiWiki::cgi_prefs($q, $session);
 363                 exit;
 364         }
 365         elsif ($q->param("do") eq "register") {
 366                 # After registration, need to go somewhere, so show prefs page.
 367                 $session->param(postsignin => "do=prefs");
 368                 # Due to do=register, this will run in registration-only
 369                 # mode.
 370                 IkiWiki::cgi_signin($q, $session);
 371                 exit;
 372         }
 373 }
 374
 375 sub auth ($$) {
 376         # While this hook is not currently used, it needs to exist
 377         # so ikiwiki knows that the wiki supports logins, and will
 378         # enable the Preferences page.
 379 }
 380
 381 1