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Original Path: trunk/webwork2/lib/WeBWorK/Authen.pm
| 1 : | sh002i | 455 | ################################################################################ |
| 2 : | sh002i | 1663 | # WeBWorK Online Homework Delivery System |
| 3 : | sh002i | 3973 | # Copyright © 2000-2006 The WeBWorK Project, http://openwebwork.sf.net/ |
| 4 : | sh002i | 4263 | # $CVSHeader: webwork2/lib/WeBWorK/Authen.pm,v 1.56 2006/07/12 04:33:55 sh002i Exp $ |
| 5 : | sh002i | 1663 | # |
| 6 : | # This program is free software; you can redistribute it and/or modify it under | ||
| 7 : | # the terms of either: (a) the GNU General Public License as published by the | ||
| 8 : | # Free Software Foundation; either version 2, or (at your option) any later | ||
| 9 : | # version, or (b) the "Artistic License" which comes with this package. | ||
| 10 : | # | ||
| 11 : | # This program is distributed in the hope that it will be useful, but WITHOUT | ||
| 12 : | # ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS | ||
| 13 : | # FOR A PARTICULAR PURPOSE. See either the GNU General Public License or the | ||
| 14 : | # Artistic License for more details. | ||
| 15 : | sh002i | 455 | ################################################################################ |
| 16 : | |||
| 17 : | malsyned | 305 | package WeBWorK::Authen; |
| 18 : | |||
| 19 : | sh002i | 455 | =head1 NAME |
| 20 : | |||
| 21 : | WeBWorK::Authen - Check user identity, manage session keys. | ||
| 22 : | |||
| 23 : | =cut | ||
| 24 : | |||
| 25 : | malsyned | 441 | use strict; |
| 26 : | use warnings; | ||
| 27 : | sh002i | 4192 | use WeBWorK::Cookie; |
| 28 : | sh002i | 1777 | use Date::Format; |
| 29 : | sh002i | 4045 | use Socket qw/unpack_sockaddr_in inet_ntoa/; # for logging |
| 30 : | use WeBWorK::Debug; | ||
| 31 : | sh002i | 3799 | use WeBWorK::Utils qw/writeCourseLog/; |
| 32 : | malsyned | 335 | |
| 33 : | sh002i | 1777 | use constant COOKIE_LIFESPAN => 60*60*24*30; # 30 days |
| 34 : | sh002i | 3799 | use constant GENERIC_ERROR_MESSAGE => "Invalid user ID or password."; |
| 35 : | sh002i | 1777 | |
| 36 : | sh002i | 4192 | use mod_perl; |
| 37 : | use constant MP2 => ( exists $ENV{MOD_PERL_API_VERSION} and $ENV{MOD_PERL_API_VERSION} >= 2 ); | ||
| 38 : | |||
| 39 : | sh002i | 4263 | BEGIN { |
| 40 : | if (MP2) { | ||
| 41 : | require APR::SockAddr; | ||
| 42 : | APR::SockAddr->import(); | ||
| 43 : | require Apache2::Connection; | ||
| 44 : | Apache2::Connection->import(); | ||
| 45 : | } | ||
| 46 : | } | ||
| 47 : | |||
| 48 : | sh002i | 3741 | ################################################################################ |
| 49 : | # Public API | ||
| 50 : | ################################################################################ | ||
| 51 : | |||
| 52 : | =head1 CONSTRUCTOR | ||
| 53 : | |||
| 54 : | =over | ||
| 55 : | |||
| 56 : | =item new($r) | ||
| 57 : | |||
| 58 : | Instantiates a new WeBWorK::Authen object for the given WeBWorK::Requst ($r). | ||
| 59 : | |||
| 60 : | =cut | ||
| 61 : | |||
| 62 : | sh002i | 1885 | sub new { |
| 63 : | my ($invocant, $r) = @_; | ||
| 64 : | malsyned | 323 | my $class = ref($invocant) || $invocant; |
| 65 : | sh002i | 1885 | my $self = { |
| 66 : | r => $r, | ||
| 67 : | }; | ||
| 68 : | malsyned | 305 | bless $self, $class; |
| 69 : | return $self; | ||
| 70 : | } | ||
| 71 : | |||
| 72 : | sh002i | 3741 | =back |
| 73 : | sh002i | 817 | |
| 74 : | sh002i | 3741 | =cut |
| 75 : | sh002i | 3366 | |
| 76 : | sh002i | 3741 | =head1 METHODS |
| 77 : | sh002i | 817 | |
| 78 : | sh002i | 3741 | =over |
| 79 : | malsyned | 323 | |
| 80 : | sh002i | 3741 | =cut |
| 81 : | sh002i | 1683 | |
| 82 : | sh002i | 4045 | sub verify { |
| 83 : | debug("BEGIN VERIFY"); | ||
| 84 : | malsyned | 305 | my $self = shift; |
| 85 : | my $r = $self->{r}; | ||
| 86 : | |||
| 87 : | sh002i | 4045 | my $result = $self->do_verify; |
| 88 : | my $error = $self->{error}; | ||
| 89 : | my $user_id = $self->{user_id}; | ||
| 90 : | my $credential_source = $self->{credential_source}; | ||
| 91 : | sh002i | 817 | |
| 92 : | sh002i | 4045 | $self->{was_verified} = $result ? 1 : 0; |
| 93 : | malsyned | 313 | |
| 94 : | sh002i | 4045 | if ($self->can("site_fixup")) { |
| 95 : | $self->site_fixup; | ||
| 96 : | gage | 3125 | } |
| 97 : | sh002i | 817 | |
| 98 : | sh002i | 4045 | if ($result) { |
| 99 : | #$self->write_log_entry("LOGIN OK user_id=$user_id credential_source=$credential_source"); | ||
| 100 : | $self->maybe_send_cookie; | ||
| 101 : | $self->set_params; | ||
| 102 : | malsyned | 313 | } else { |
| 103 : | sh002i | 4045 | #$self->write_log_entry("LOGIN FAILED user_id=$user_id credential_source=$credential_source"); |
| 104 : | sh002i | 4135 | $self->maybe_kill_cookie; |
| 105 : | sh002i | 4045 | if ($error) { |
| 106 : | sh002i | 4192 | MP2 ? $r->notes->set(authen_error => $error) : $r->notes("authen_error" => $error); |
| 107 : | sh002i | 1683 | } |
| 108 : | malsyned | 305 | } |
| 109 : | sh002i | 4045 | |
| 110 : | debug("END VERIFY"); | ||
| 111 : | return $result; | ||
| 112 : | malsyned | 305 | } |
| 113 : | |||
| 114 : | sh002i | 3741 | =item was_verified() |
| 115 : | |||
| 116 : | Returns true if verify() returned true the last time it was called. | ||
| 117 : | |||
| 118 : | =cut | ||
| 119 : | |||
| 120 : | sub was_verified { | ||
| 121 : | my ($self) = @_; | ||
| 122 : | |||
| 123 : | return 1 if exists $self->{was_verified} and $self->{was_verified}; | ||
| 124 : | return 0; | ||
| 125 : | } | ||
| 126 : | |||
| 127 : | =item forget_verification() | ||
| 128 : | |||
| 129 : | Future calls to was_verified() will return false, until verify() is called again and succeeds. | ||
| 130 : | |||
| 131 : | =cut | ||
| 132 : | |||
| 133 : | sub forget_verification { | ||
| 134 : | my ($self) = @_; | ||
| 135 : | |||
| 136 : | $self->{was_verified} = 0; | ||
| 137 : | } | ||
| 138 : | |||
| 139 : | sh002i | 4045 | =back |
| 140 : | sh002i | 3741 | |
| 141 : | =cut | ||
| 142 : | |||
| 143 : | sh002i | 4045 | ################################################################################ |
| 144 : | # Helper functions (called by verify) | ||
| 145 : | ################################################################################ | ||
| 146 : | |||
| 147 : | sub do_verify { | ||
| 148 : | my $self = shift; | ||
| 149 : | sh002i | 3688 | my $r = $self->{r}; |
| 150 : | my $ce = $r->ce; | ||
| 151 : | my $db = $r->db; | ||
| 152 : | |||
| 153 : | sh002i | 4045 | return 0 unless $db; |
| 154 : | sh002i | 3688 | |
| 155 : | sh002i | 4045 | return 0 unless $self->get_credentials; |
| 156 : | sh002i | 3688 | |
| 157 : | sh002i | 4045 | return 0 unless $self->check_user; |
| 158 : | sh002i | 3688 | |
| 159 : | sh002i | 4045 | my $practiceUserPrefix = $ce->{practiceUserPrefix}; |
| 160 : | if ($practiceUserPrefix and $self->{user_id} =~ /^$practiceUserPrefix/){ | ||
| 161 : | return $self->verify_practice_user; | ||
| 162 : | } else { | ||
| 163 : | return $self->verify_normal_user; | ||
| 164 : | } | ||
| 165 : | } | ||
| 166 : | |||
| 167 : | sub get_credentials { | ||
| 168 : | my ($self) = @_; | ||
| 169 : | my $r = $self->{r}; | ||
| 170 : | my $ce = $r->ce; | ||
| 171 : | my $db = $r->db; | ||
| 172 : | sh002i | 3688 | |
| 173 : | sh002i | 4045 | # allow guest login: if the "Guest Login" button was clicked, we find an unused |
| 174 : | # practice user and create a session for it. | ||
| 175 : | if ($r->param("login_practice_user")) { | ||
| 176 : | my $practiceUserPrefix = $ce->{practiceUserPrefix}; | ||
| 177 : | my @guestUserIDs = grep m/^$practiceUserPrefix/, $db->listUsers; | ||
| 178 : | my @GuestUsers = $db->getUsers(@guestUserIDs); | ||
| 179 : | my @allowedGuestUsers = grep { $ce->status_abbrev_has_behavior($_->status, "allow_course_access") } @GuestUsers; | ||
| 180 : | my @allowedGestUserIDs = map { $_->user_id } @allowedGuestUsers; | ||
| 181 : | sh002i | 3688 | |
| 182 : | sh002i | 4045 | foreach my $userID (@allowedGestUserIDs) { |
| 183 : | if (not $self->unexpired_session_exists($userID)) { | ||
| 184 : | my $newKey = $self->create_session($userID); | ||
| 185 : | |||
| 186 : | $self->{user_id} = $userID; | ||
| 187 : | $self->{session_key} = $newKey; | ||
| 188 : | $self->{credential_source} = "guest"; | ||
| 189 : | debug("guest user '", $userID. "' key '", $newKey. "'"); | ||
| 190 : | return 1; | ||
| 191 : | } | ||
| 192 : | sh002i | 3688 | } |
| 193 : | |||
| 194 : | sh002i | 4045 | $self->write_log_entry("GUEST LOGIN FAILED - no logins availabe"); |
| 195 : | $self->{error} = "No practice users are available. Please try again in a few minutes."; | ||
| 196 : | return 0; | ||
| 197 : | } | ||
| 198 : | |||
| 199 : | # at least the user ID is available in request parameters | ||
| 200 : | if (defined $r->param("user")) { | ||
| 201 : | $self->{user_id} = $r->param("user"); | ||
| 202 : | $self->{session_key} = $r->param("key"); | ||
| 203 : | $self->{password} = $r->param("passwd"); | ||
| 204 : | $self->{credential_source} = "params"; | ||
| 205 : | debug("params user '", $self->{user_id}, "' password '", $self->{password}, "' key '", $self->{session_key}, "'"); | ||
| 206 : | return 1; | ||
| 207 : | } | ||
| 208 : | |||
| 209 : | my ($cookieUser, $cookieKey) = $self->fetchCookie; | ||
| 210 : | if (defined $cookieUser) { | ||
| 211 : | $self->{user_id} = $cookieUser; | ||
| 212 : | $self->{session_key} = $cookieKey; | ||
| 213 : | $self->{credential_source} = "cookie"; | ||
| 214 : | debug("cookie user '", $self->{user_id}, "' key '", $self->{session_key}, "'"); | ||
| 215 : | return 1; | ||
| 216 : | } | ||
| 217 : | } | ||
| 218 : | |||
| 219 : | sub check_user { | ||
| 220 : | my $self = shift; | ||
| 221 : | my $r = $self->{r}; | ||
| 222 : | my $ce = $r->ce; | ||
| 223 : | my $db = $r->db; | ||
| 224 : | my $authz = $r->authz; | ||
| 225 : | |||
| 226 : | my $user_id = $self->{user_id}; | ||
| 227 : | |||
| 228 : | if (defined $user_id and $user_id eq "") { | ||
| 229 : | $self->{error} = "You must specify a user ID."; | ||
| 230 : | return 0; | ||
| 231 : | } | ||
| 232 : | |||
| 233 : | my $User = $db->getUser($user_id); | ||
| 234 : | |||
| 235 : | unless ($User) { | ||
| 236 : | $self->write_log_entry("LOGIN FAILED $user_id - user unknown"); | ||
| 237 : | $self->{error} = GENERIC_ERROR_MESSAGE; | ||
| 238 : | return 0; | ||
| 239 : | } | ||
| 240 : | |||
| 241 : | # FIXME "fix invalid status values" used to be here, but it needs to move to $db->getUser | ||
| 242 : | |||
| 243 : | unless ($ce->status_abbrev_has_behavior($User->status, "allow_course_access")) { | ||
| 244 : | $self->write_log_entry("LOGIN FAILED $user_id - course access denied"); | ||
| 245 : | $self->{error} = GENERIC_ERROR_MESSAGE; | ||
| 246 : | return 0; | ||
| 247 : | } | ||
| 248 : | |||
| 249 : | unless ($authz->hasPermissions($user_id, "login")) { | ||
| 250 : | $self->write_log_entry("LOGIN FAILED $user_id - no permission to login"); | ||
| 251 : | $self->{error} = GENERIC_ERROR_MESSAGE; | ||
| 252 : | return 0; | ||
| 253 : | } | ||
| 254 : | |||
| 255 : | return 1; | ||
| 256 : | } | ||
| 257 : | |||
| 258 : | sub verify_practice_user { | ||
| 259 : | my $self = shift; | ||
| 260 : | my $r = $self->{r}; | ||
| 261 : | my $ce = $r->ce; | ||
| 262 : | |||
| 263 : | my $user_id = $self->{user_id}; | ||
| 264 : | my $session_key = $self->{session_key}; | ||
| 265 : | |||
| 266 : | my ($sessionExists, $keyMatches, $timestampValid) = $self->check_session($user_id, $session_key, 1); | ||
| 267 : | debug("sessionExists='", $sessionExists, "' keyMatches='", $keyMatches, "' timestampValid='", $timestampValid, "'"); | ||
| 268 : | |||
| 269 : | if ($sessionExists) { | ||
| 270 : | if ($keyMatches) { | ||
| 271 : | if ($timestampValid) { | ||
| 272 : | return 1; | ||
| 273 : | sh002i | 3688 | } else { |
| 274 : | sh002i | 4045 | $self->{session_key} = $self->create_session($user_id); |
| 275 : | return 1; | ||
| 276 : | } | ||
| 277 : | } else { | ||
| 278 : | if ($timestampValid) { | ||
| 279 : | my $debugPracticeUser = $ce->{debugPracticeUser}; | ||
| 280 : | if (defined $debugPracticeUser and $user_id eq $debugPracticeUser) { | ||
| 281 : | $self->{session_key} = $self->create_session($user_id); | ||
| 282 : | return 1; | ||
| 283 : | sh002i | 3688 | } else { |
| 284 : | sh002i | 4045 | $self->{error} = "That guest account is in use."; |
| 285 : | return 0; | ||
| 286 : | sh002i | 3688 | } |
| 287 : | sh002i | 4045 | } else { |
| 288 : | $self->{session_key} = $self->create_session($user_id); | ||
| 289 : | return 1; | ||
| 290 : | sh002i | 3688 | } |
| 291 : | } | ||
| 292 : | sh002i | 4045 | } else { |
| 293 : | $self->{session_key} = $self->create_session($user_id); | ||
| 294 : | return 1; | ||
| 295 : | } | ||
| 296 : | } | ||
| 297 : | glarose | 4029 | |
| 298 : | sh002i | 4045 | sub verify_normal_user { |
| 299 : | my $self = shift; | ||
| 300 : | my $r = $self->{r}; | ||
| 301 : | |||
| 302 : | my $user_id = $self->{user_id}; | ||
| 303 : | my $session_key = $self->{session_key}; | ||
| 304 : | |||
| 305 : | my ($sessionExists, $keyMatches, $timestampValid) = $self->check_session($user_id, $session_key, 1); | ||
| 306 : | debug("sessionExists='", $sessionExists, "' keyMatches='", $keyMatches, "' timestampValid='", $timestampValid, "'"); | ||
| 307 : | |||
| 308 : | if ($keyMatches and $timestampValid) { | ||
| 309 : | return 1; | ||
| 310 : | } else { | ||
| 311 : | my $auth_result = $self->authenticate; | ||
| 312 : | |||
| 313 : | if ($auth_result > 0) { | ||
| 314 : | $self->{session_key} = $self->create_session($user_id); | ||
| 315 : | $self->write_log_entry("LOGIN OK $user_id"); | ||
| 316 : | return 1; | ||
| 317 : | } elsif ($auth_result == 0) { | ||
| 318 : | $self->write_log_entry("LOGIN FAILED $user_id - authentication failed"); | ||
| 319 : | $self->{error} = GENERIC_ERROR_MESSAGE; | ||
| 320 : | return 0; | ||
| 321 : | } else { # ($auth_result < 0) => required data was not present | ||
| 322 : | if ($keyMatches and not $timestampValid) { | ||
| 323 : | $self->{error} = "Your session has timed out due to inactivity. Please log in again."; | ||
| 324 : | sh002i | 3688 | } |
| 325 : | sh002i | 4045 | return 0; |
| 326 : | sh002i | 3688 | } |
| 327 : | } | ||
| 328 : | sh002i | 4045 | } |
| 329 : | |||
| 330 : | # 1 == authentication succeeded | ||
| 331 : | # 0 == required data was present, but authentication failed | ||
| 332 : | # -1 == required data was not present (i.e. password missing) | ||
| 333 : | sub authenticate { | ||
| 334 : | my $self = shift; | ||
| 335 : | my $r = $self->{r}; | ||
| 336 : | sh002i | 3688 | |
| 337 : | sh002i | 4045 | my $user_id = $self->{user_id}; |
| 338 : | my $password = $self->{password}; | ||
| 339 : | |||
| 340 : | if (defined $password) { | ||
| 341 : | return $self->checkPassword($user_id, $password); | ||
| 342 : | sh002i | 3688 | } else { |
| 343 : | sh002i | 4045 | return -1; |
| 344 : | sh002i | 3688 | } |
| 345 : | glarose | 3377 | } |
| 346 : | |||
| 347 : | sh002i | 4045 | sub maybe_send_cookie { |
| 348 : | my $self = shift; | ||
| 349 : | my $r = $self->{r}; | ||
| 350 : | |||
| 351 : | my ($cookie_user, $cookie_key) = $self->fetchCookie; | ||
| 352 : | |||
| 353 : | # we send a cookie if any of these conditions are met: | ||
| 354 : | |||
| 355 : | # (a) a cookie was used for authentication | ||
| 356 : | my $used_cookie = ($self->{credential_source} eq "cookie"); | ||
| 357 : | |||
| 358 : | # (b) a cookie was sent but not used for authentication, and the | ||
| 359 : | # credentials used for authentication were the same as those in | ||
| 360 : | # the cookie | ||
| 361 : | my $unused_valid_cookie = ($self->{credential_source} ne "cookie" | ||
| 362 : | and defined $cookie_user and $self->{user_id} eq $cookie_user | ||
| 363 : | and defined $cookie_key and $self->{session_key} eq $cookie_key); | ||
| 364 : | |||
| 365 : | # (c) the user asked to have a cookie sent and is not a guest user. | ||
| 366 : | my $user_requests_cookie = ($self->{credential_source} ne "guest" | ||
| 367 : | and $r->param("send_cookie")); | ||
| 368 : | |||
| 369 : | debug("used_cookie='", $used_cookie, "' unused_valid_cookie='", $unused_valid_cookie, "' user_requests_cookie='", $user_requests_cookie, "'"); | ||
| 370 : | |||
| 371 : | if ($used_cookie or $unused_valid_cookie or $user_requests_cookie) { | ||
| 372 : | $self->sendCookie($self->{user_id}, $self->{session_key}); | ||
| 373 : | } else { | ||
| 374 : | $self->killCookie; | ||
| 375 : | } | ||
| 376 : | } | ||
| 377 : | sh002i | 3741 | |
| 378 : | sh002i | 4135 | sub maybe_kill_cookie { |
| 379 : | my $self = shift; | ||
| 380 : | $self->killCookie(@_); | ||
| 381 : | } | ||
| 382 : | |||
| 383 : | sh002i | 4045 | sub set_params { |
| 384 : | my $self = shift; | ||
| 385 : | my $r = $self->{r}; | ||
| 386 : | |||
| 387 : | sh002i | 4192 | # A2 - params are not non-modifiable, with no explanation or workaround given in docs. WTF! |
| 388 : | sh002i | 4045 | $r->param("user", $self->{user_id}); |
| 389 : | $r->param("key", $self->{session_key}); | ||
| 390 : | $r->param("passwd", ""); | ||
| 391 : | |||
| 392 : | debug("params user='", $r->param("user"), "' key='", $r->param("key"), "' passwd='", $r->param("passwd"), "'"); | ||
| 393 : | } | ||
| 394 : | sh002i | 3741 | |
| 395 : | ################################################################################ | ||
| 396 : | # Password management | ||
| 397 : | ################################################################################ | ||
| 398 : | |||
| 399 : | sh002i | 4045 | sub checkPassword { |
| 400 : | sh002i | 3741 | my ($self, $userID, $possibleClearPassword) = @_; |
| 401 : | my $db = $self->{r}->db; | ||
| 402 : | |||
| 403 : | my $Password = $db->getPassword($userID); # checked | ||
| 404 : | return 0 unless defined $Password; | ||
| 405 : | |||
| 406 : | # check against WW password database | ||
| 407 : | my $possibleCryptPassword = crypt($possibleClearPassword, $Password->password()); | ||
| 408 : | return 1 if $possibleCryptPassword eq $Password->password; | ||
| 409 : | |||
| 410 : | # check site-specific verification method | ||
| 411 : | return 1 if $self->site_checkPassword($userID, $possibleClearPassword); | ||
| 412 : | |||
| 413 : | # fail by default | ||
| 414 : | return 0; | ||
| 415 : | } | ||
| 416 : | |||
| 417 : | # Site-specific password checking | ||
| 418 : | # | ||
| 419 : | # The site_checkPassword routine can be used to provide a hook to your institution's | ||
| 420 : | # authentication system. If authentication against the course's password database, the | ||
| 421 : | # method $self->site_checkPassword($userID, $clearTextPassword) is called. If this | ||
| 422 : | # method returns a true value, authentication succeeds. | ||
| 423 : | # | ||
| 424 : | # Here is an example site_checkPassword which checks the password against the Ohio State | ||
| 425 : | # popmail server: | ||
| 426 : | sh002i | 4045 | # sub site_checkPassword { |
| 427 : | sh002i | 3741 | # my ($self, $userID, $clearTextPassword) = @_; |
| 428 : | # use Net::POP3; | ||
| 429 : | # my $pop = Net::POP3->new('pop.service.ohio-state.edu', Timeout => 60); | ||
| 430 : | # if ($pop->login($userID, $clearTextPassword)) { | ||
| 431 : | # return 1; | ||
| 432 : | # } | ||
| 433 : | # return 0; | ||
| 434 : | # } | ||
| 435 : | # | ||
| 436 : | # Since you have access to the WeBWorK::Authen object, the possibilities are limitless! | ||
| 437 : | # This example checks the password against the system password database and updates the | ||
| 438 : | # user's password in the course database if it succeeds: | ||
| 439 : | # sub site_checkPassword { | ||
| 440 : | # my ($self, $userID, $clearTextPassword) = @_; | ||
| 441 : | # my $realCryptPassword = (getpwnam $userID)[1] or return 0; | ||
| 442 : | # my $possibleCryptPassword = crypt($possibleClearPassword, $realCryptPassword); # user real PW as salt | ||
| 443 : | # if ($possibleCryptPassword eq $realCryptPassword) { | ||
| 444 : | # # update WeBWorK password | ||
| 445 : | # use WeBWorK::Utils qw(cryptPassword); | ||
| 446 : | # my $db = $self->{r}->db; | ||
| 447 : | # my $Password = $db->getPassword($userID); | ||
| 448 : | # my $pass = cryptPassword($clearTextPassword); | ||
| 449 : | # $Password->password($pass); | ||
| 450 : | # $db->putPassword($Password); | ||
| 451 : | # return 1; | ||
| 452 : | # } else { | ||
| 453 : | # return 0; | ||
| 454 : | # } | ||
| 455 : | # } | ||
| 456 : | # | ||
| 457 : | # | ||
| 458 : | # The default site_checkPassword always fails: | ||
| 459 : | sub site_checkPassword { | ||
| 460 : | my ($self, $userID, $clearTextPassword) = @_; | ||
| 461 : | return 0; | ||
| 462 : | } | ||
| 463 : | |||
| 464 : | ################################################################################ | ||
| 465 : | # Session key management | ||
| 466 : | ################################################################################ | ||
| 467 : | |||
| 468 : | sh002i | 4045 | sub unexpired_session_exists { |
| 469 : | sh002i | 3741 | my ($self, $userID) = @_; |
| 470 : | my $ce = $self->{r}->ce; | ||
| 471 : | my $db = $self->{r}->db; | ||
| 472 : | |||
| 473 : | my $Key = $db->getKey($userID); # checked | ||
| 474 : | return 0 unless defined $Key; | ||
| 475 : | if (time <= $Key->timestamp()+$ce->{sessionKeyTimeout}) { | ||
| 476 : | sh002i | 4045 | # unexpired, but leave timestamp alone |
| 477 : | return 1; | ||
| 478 : | sh002i | 3741 | } else { |
| 479 : | # expired -- delete key | ||
| 480 : | sh002i | 4045 | # NEW: no longer delete the key here -- a user re-visiting with a formerly-valid key should |
| 481 : | # always get a "session expired" message. formerly, if they i.e. reload the login screen | ||
| 482 : | # the message disappears, which is confusing (i claim ;) | ||
| 483 : | #$db->deleteKey($userID); | ||
| 484 : | sh002i | 3741 | return 0; |
| 485 : | } | ||
| 486 : | } | ||
| 487 : | |||
| 488 : | sh002i | 4045 | # clobbers any existing session for this $userID |
| 489 : | # if $newKey is not specified, a random key is generated | ||
| 490 : | # the key is returned | ||
| 491 : | sub create_session { | ||
| 492 : | my ($self, $userID, $newKey) = @_; | ||
| 493 : | sh002i | 3741 | my $ce = $self->{r}->ce; |
| 494 : | my $db = $self->{r}->db; | ||
| 495 : | |||
| 496 : | sh002i | 4045 | my $timestamp = time; |
| 497 : | unless ($newKey) { | ||
| 498 : | my @chars = @{ $ce->{sessionKeyChars} }; | ||
| 499 : | my $length = $ce->{sessionKeyLength}; | ||
| 500 : | |||
| 501 : | srand; | ||
| 502 : | $newKey = join ("", @chars[map rand(@chars), 1 .. $length]); | ||
| 503 : | } | ||
| 504 : | |||
| 505 : | my $Key = $db->newKey(user_id=>$userID, key=>$newKey, timestamp=>$timestamp); | ||
| 506 : | eval { $db->deleteKey($userID) }; | ||
| 507 : | $db->addKey($Key); | ||
| 508 : | return $newKey; | ||
| 509 : | } | ||
| 510 : | |||
| 511 : | # returns ($sessionExists, $keyMatches, $timestampValid) | ||
| 512 : | # if $updateTimestamp is true, the timestamp on a valid session is updated | ||
| 513 : | sub check_session { | ||
| 514 : | my ($self, $userID, $possibleKey, $updateTimestamp) = @_; | ||
| 515 : | my $ce = $self->{r}->ce; | ||
| 516 : | my $db = $self->{r}->db; | ||
| 517 : | |||
| 518 : | sh002i | 3741 | my $Key = $db->getKey($userID); # checked |
| 519 : | return 0 unless defined $Key; | ||
| 520 : | sh002i | 4045 | |
| 521 : | my $keyMatches = (defined $possibleKey and $possibleKey eq $Key->key); | ||
| 522 : | my $timestampValid = (time <= $Key->timestamp()+$ce->{sessionKeyTimeout}); | ||
| 523 : | |||
| 524 : | if ($keyMatches and $timestampValid and $updateTimestamp) { | ||
| 525 : | $Key->timestamp(time); | ||
| 526 : | $db->putKey($Key); | ||
| 527 : | sh002i | 3741 | } |
| 528 : | sh002i | 4045 | |
| 529 : | return (1, $keyMatches, $timestampValid); | ||
| 530 : | sh002i | 3741 | } |
| 531 : | |||
| 532 : | ################################################################################ | ||
| 533 : | # Cookie management | ||
| 534 : | ################################################################################ | ||
| 535 : | |||
| 536 : | sub fetchCookie { | ||
| 537 : | sh002i | 4045 | my $self = shift; |
| 538 : | sh002i | 3741 | my $r = $self->{r}; |
| 539 : | my $ce = $r->ce; | ||
| 540 : | my $urlpath = $r->urlpath; | ||
| 541 : | |||
| 542 : | my $courseID = $urlpath->arg("courseID"); | ||
| 543 : | |||
| 544 : | sh002i | 4192 | # AP2 - Apache2::Cookie needs $r, Apache::Cookie doesn't |
| 545 : | my %cookies = WeBWorK::Cookie->fetch( MP2 ? $r : () ); | ||
| 546 : | sh002i | 3741 | my $cookie = $cookies{"WeBWorKCourseAuthen.$courseID"}; |
| 547 : | |||
| 548 : | if ($cookie) { | ||
| 549 : | sh002i | 4045 | debug("found a cookie for this course: '", $cookie->as_string, "'"); |
| 550 : | debug("cookie has this value: '", $cookie->value, "'"); | ||
| 551 : | sh002i | 3741 | my ($userID, $key) = split "\t", $cookie->value; |
| 552 : | if (defined $userID and defined $key and $userID ne "" and $key ne "") { | ||
| 553 : | sh002i | 4045 | debug("looks good, returning userID='$userID' key='$key'"); |
| 554 : | sh002i | 3741 | return $userID, $key; |
| 555 : | } else { | ||
| 556 : | sh002i | 4045 | debug("malformed cookie. returning nothing."); |
| 557 : | return; | ||
| 558 : | sh002i | 3741 | } |
| 559 : | } else { | ||
| 560 : | sh002i | 4045 | debug("found no cookie for this course. returning nothing."); |
| 561 : | return; | ||
| 562 : | sh002i | 3741 | } |
| 563 : | } | ||
| 564 : | |||
| 565 : | sub sendCookie { | ||
| 566 : | my ($self, $userID, $key) = @_; | ||
| 567 : | my $r = $self->{r}; | ||
| 568 : | my $ce = $r->ce; | ||
| 569 : | |||
| 570 : | my $courseID = $r->urlpath->arg("courseID"); | ||
| 571 : | |||
| 572 : | my $expires = time2str("%a, %d-%h-%Y %H:%M:%S %Z", time+COOKIE_LIFESPAN, "GMT"); | ||
| 573 : | sh002i | 4192 | my $cookie = WeBWorK::Cookie->new($r, |
| 574 : | sh002i | 3741 | -name => "WeBWorKCourseAuthen.$courseID", |
| 575 : | -value => "$userID\t$key", | ||
| 576 : | -expires => $expires, | ||
| 577 : | -domain => $r->hostname, | ||
| 578 : | -path => $ce->{webworkURLRoot}, | ||
| 579 : | -secure => 0, | ||
| 580 : | ); | ||
| 581 : | |||
| 582 : | sh002i | 4045 | debug("about to add Set-Cookie header with this string: '", $cookie->as_string, "'"); |
| 583 : | sh002i | 3741 | $r->headers_out->set("Set-Cookie" => $cookie->as_string); |
| 584 : | } | ||
| 585 : | |||
| 586 : | sub killCookie { | ||
| 587 : | my ($self) = @_; | ||
| 588 : | my $r = $self->{r}; | ||
| 589 : | my $ce = $r->ce; | ||
| 590 : | |||
| 591 : | my $courseID = $r->urlpath->arg("courseID"); | ||
| 592 : | |||
| 593 : | my $expires = time2str("%a, %d-%h-%Y %H:%M:%S %Z", time-60*60*24, "GMT"); | ||
| 594 : | sh002i | 4192 | my $cookie = WeBWorK::Cookie->new($r, |
| 595 : | sh002i | 3741 | -name => "WeBWorKCourseAuthen.$courseID", |
| 596 : | -value => "\t", | ||
| 597 : | -expires => $expires, | ||
| 598 : | -domain => $r->hostname, | ||
| 599 : | -path => $ce->{webworkURLRoot}, | ||
| 600 : | -secure => 0, | ||
| 601 : | ); | ||
| 602 : | |||
| 603 : | sh002i | 4045 | debug("about to add Set-Cookie header with this string: '", $cookie->as_string, "'"); |
| 604 : | sh002i | 3741 | $r->headers_out->set("Set-Cookie" => $cookie->as_string); |
| 605 : | } | ||
| 606 : | |||
| 607 : | ################################################################################ | ||
| 608 : | # Utilities | ||
| 609 : | ################################################################################ | ||
| 610 : | |||
| 611 : | sh002i | 3799 | sub write_log_entry { |
| 612 : | my ($self, $message) = @_; | ||
| 613 : | |||
| 614 : | sh002i | 3741 | my $r = $self->{r}; |
| 615 : | my $ce = $r->ce; | ||
| 616 : | sh002i | 3799 | |
| 617 : | sh002i | 4192 | my ($remote_host, $remote_port); |
| 618 : | if (MP2) { | ||
| 619 : | $remote_host = $r->connection->remote_addr->ip_get || "UNKNOWN"; | ||
| 620 : | $remote_port = $r->connection->remote_addr->port || "UNKNOWN"; | ||
| 621 : | } else { | ||
| 622 : | ($remote_port, $remote_host) = unpack_sockaddr_in($r->connection->remote_addr); | ||
| 623 : | $remote_host = defined $remote_host ? inet_ntoa($remote_host) : "UNKNOWN"; | ||
| 624 : | $remote_port = "UNKNOWN" unless defined $remote_port; | ||
| 625 : | } | ||
| 626 : | sh002i | 4238 | my $user_agent = $r->headers_in->{"User-Agent"}; |
| 627 : | sh002i | 3799 | |
| 628 : | sh002i | 4132 | my $log_msg = "$message (host=$remote_host port=$remote_port UA=$user_agent"; |
| 629 : | debug("Writing to login log: '$log_msg'.\n"); | ||
| 630 : | writeCourseLog($ce, "login_log", $log_msg); | ||
| 631 : | sh002i | 3741 | } |
| 632 : | |||
| 633 : | malsyned | 305 | 1; |
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