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| 1 : | sh002i | 455 | ################################################################################ |
| 2 : | sh002i | 1663 | # WeBWorK Online Homework Delivery System |
| 3 : | # Copyright © 2000-2003 The WeBWorK Project, http://openwebwork.sf.net/ | ||
| 4 : | glarose | 2527 | # $CVSHeader: webwork2/lib/WeBWorK/Authen.pm,v 1.30 2004/03/15 20:17:35 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 | 1683 | use Apache::Cookie; |
| 28 : | sh002i | 1777 | use Date::Format; |
| 29 : | malsyned | 335 | |
| 30 : | sh002i | 1777 | use constant COOKIE_LIFESPAN => 60*60*24*30; # 30 days |
| 31 : | |||
| 32 : | sh002i | 1885 | sub new { |
| 33 : | my ($invocant, $r) = @_; | ||
| 34 : | malsyned | 323 | my $class = ref($invocant) || $invocant; |
| 35 : | sh002i | 1885 | my $self = { |
| 36 : | r => $r, | ||
| 37 : | }; | ||
| 38 : | malsyned | 305 | bless $self, $class; |
| 39 : | return $self; | ||
| 40 : | } | ||
| 41 : | |||
| 42 : | sh002i | 817 | sub checkPassword($$$) { |
| 43 : | my ($self, $userID, $possibleClearPassword) = @_; | ||
| 44 : | sh002i | 1885 | my $db = $self->{r}->db; |
| 45 : | |||
| 46 : | my $Password = $db->getPassword($userID); # checked | ||
| 47 : | sh002i | 1636 | return 0 unless defined $Password; |
| 48 : | sh002i | 1885 | |
| 49 : | sh002i | 817 | my $possibleCryptPassword = crypt($possibleClearPassword, $Password->password()); |
| 50 : | return $possibleCryptPassword eq $Password->password(); | ||
| 51 : | } | ||
| 52 : | |||
| 53 : | sub generateKey($$) { | ||
| 54 : | my ($self, $userID) = @_; | ||
| 55 : | sh002i | 1885 | my $ce = $self->{r}->ce; |
| 56 : | |||
| 57 : | my @chars = @{ $ce->{sessionKeyChars} }; | ||
| 58 : | my $length = $ce->{sessionKeyLength}; | ||
| 59 : | |||
| 60 : | malsyned | 323 | srand; |
| 61 : | sh002i | 817 | my $key = join ("", @chars[map rand(@chars), 1 .. $length]); |
| 62 : | return WeBWorK::DB::Record::Key->new(user_id=>$userID, key=>$key, timestamp=>time); | ||
| 63 : | } | ||
| 64 : | |||
| 65 : | sub checkKey($$$) { | ||
| 66 : | my ($self, $userID, $possibleKey) = @_; | ||
| 67 : | sh002i | 1885 | my $ce = $self->{r}->ce; |
| 68 : | my $db = $self->{r}->db; | ||
| 69 : | |||
| 70 : | my $Key = $db->getKey($userID); # checked | ||
| 71 : | sh002i | 1636 | return 0 unless defined $Key; |
| 72 : | sh002i | 1885 | if (time <= $Key->timestamp()+$ce->{sessionKeyTimeout}) { |
| 73 : | sh002i | 817 | if ($possibleKey eq $Key->key()) { |
| 74 : | # unexpired and matches -- update timestamp | ||
| 75 : | $Key->timestamp(time); | ||
| 76 : | sh002i | 1885 | $db->putKey($Key); |
| 77 : | sh002i | 817 | return 1; |
| 78 : | } else { | ||
| 79 : | # unexpired but doesn't match -- leave timestamp alone | ||
| 80 : | # we do this to keep an attacker from keeping someone's session | ||
| 81 : | # alive. (yeah, we don't match IPs.) | ||
| 82 : | return 0; | ||
| 83 : | } | ||
| 84 : | } else { | ||
| 85 : | # expired -- delete key | ||
| 86 : | sh002i | 1885 | $db->deleteKey($userID); |
| 87 : | sh002i | 817 | return 0; |
| 88 : | malsyned | 323 | } |
| 89 : | } | ||
| 90 : | |||
| 91 : | sh002i | 817 | sub unexpiredKeyExists($$) { |
| 92 : | my ($self, $userID) = @_; | ||
| 93 : | sh002i | 1885 | my $ce = $self->{r}->ce; |
| 94 : | my $db = $self->{r}->db; | ||
| 95 : | |||
| 96 : | my $Key = $db->getKey($userID); # checked | ||
| 97 : | sh002i | 1636 | return 0 unless defined $Key; |
| 98 : | sh002i | 1885 | if (time <= $Key->timestamp()+$ce->{sessionKeyTimeout}) { |
| 99 : | sh002i | 817 | # unexpired, but leave timestamp alone |
| 100 : | return 1; | ||
| 101 : | } else { | ||
| 102 : | # expired -- delete key | ||
| 103 : | sh002i | 1885 | $db->deleteKey($userID); |
| 104 : | sh002i | 817 | return 0; |
| 105 : | } | ||
| 106 : | } | ||
| 107 : | |||
| 108 : | sh002i | 1777 | sub fetchCookie { |
| 109 : | sh002i | 1683 | my ($self, $user, $key) = @_; |
| 110 : | my $r = $self->{r}; | ||
| 111 : | sh002i | 1885 | my $ce = $r->ce; |
| 112 : | my $urlpath = $r->urlpath; | ||
| 113 : | sh002i | 1777 | |
| 114 : | sh002i | 1885 | my $courseID = $urlpath->arg("courseID"); |
| 115 : | |||
| 116 : | sh002i | 1683 | my %cookies = Apache::Cookie->fetch; |
| 117 : | sh002i | 1777 | my $cookie = $cookies{"WeBWorKCourseAuthen.$courseID"}; |
| 118 : | |||
| 119 : | sh002i | 1683 | if ($cookie) { |
| 120 : | sh002i | 1777 | #warn __PACKAGE__, ": fetchCookie: found a cookie for this course: \"", $cookie->as_string, "\"\n"; |
| 121 : | #warn __PACKAGE__, ": fetchCookie: cookie has this value: \"", $cookie->value, "\"\n"; | ||
| 122 : | my ($userID, $key) = split "\t", $cookie->value; | ||
| 123 : | if (defined $userID and defined $key and $userID ne "" and $key ne "") { | ||
| 124 : | #warn __PACKAGE__, ": fetchCookie: looks good, returning userID=$userID key=$key\n"; | ||
| 125 : | return $userID, $key; | ||
| 126 : | } else { | ||
| 127 : | #warn __PACKAGE__, ": fetchCookie: malformed cookie. returning empty strings.\n"; | ||
| 128 : | return "", ""; | ||
| 129 : | } | ||
| 130 : | } else { | ||
| 131 : | #warn __PACKAGE__, ": fetchCookie: found no cookie for this course. returning empty strings.\n"; | ||
| 132 : | return "", ""; | ||
| 133 : | sh002i | 1683 | } |
| 134 : | } | ||
| 135 : | |||
| 136 : | sub sendCookie { | ||
| 137 : | sh002i | 1777 | my ($self, $userID, $key) = @_; |
| 138 : | sh002i | 1683 | my $r = $self->{r}; |
| 139 : | sh002i | 1885 | my $ce = $r->ce; |
| 140 : | sh002i | 1777 | |
| 141 : | sh002i | 1885 | my $courseID = $r->urlpath->arg("courseID"); |
| 142 : | |||
| 143 : | sh002i | 1777 | my $expires = time2str("%a, %d-%h-%Y %H:%M:%S %Z", time+COOKIE_LIFESPAN, "GMT"); |
| 144 : | sh002i | 1683 | my $cookie = Apache::Cookie->new($r, |
| 145 : | sh002i | 1777 | -name => "WeBWorKCourseAuthen.$courseID", |
| 146 : | -value => "$userID\t$key", | ||
| 147 : | -expires => $expires, | ||
| 148 : | -domain => $r->hostname, | ||
| 149 : | -path => $ce->{webworkURLRoot}, | ||
| 150 : | -secure => 0, | ||
| 151 : | sh002i | 1683 | ); |
| 152 : | sh002i | 1777 | my $cookieString = $cookie->as_string; |
| 153 : | |||
| 154 : | #warn __PACKAGE__, ": sendCookie: about to add Set-Cookie header with this string: \"", $cookie->as_string, "\"\n"; | ||
| 155 : | sh002i | 1683 | $r->headers_out->set("Set-Cookie" => $cookie->as_string); |
| 156 : | } | ||
| 157 : | |||
| 158 : | sh002i | 1685 | sub killCookie { |
| 159 : | my ($self) = @_; | ||
| 160 : | my $r = $self->{r}; | ||
| 161 : | sh002i | 1885 | my $ce = $r->ce; |
| 162 : | sh002i | 1777 | |
| 163 : | sh002i | 1885 | my $courseID = $r->urlpath->arg("courseID"); |
| 164 : | |||
| 165 : | sh002i | 1777 | my $expires = time2str("%a, %d-%h-%Y %H:%M:%S %Z", time-60*60*24, "GMT"); |
| 166 : | sh002i | 1685 | my $cookie = Apache::Cookie->new($r, |
| 167 : | sh002i | 1777 | -name => "WeBWorKCourseAuthen.$courseID", |
| 168 : | -value => "\t", | ||
| 169 : | -expires => $expires, | ||
| 170 : | sh002i | 1685 | -domain => $r->hostname, |
| 171 : | -path => $ce->{webworkURLRoot}, | ||
| 172 : | -secure => 0, | ||
| 173 : | ); | ||
| 174 : | sh002i | 1777 | my $cookieString = $cookie->as_string; |
| 175 : | |||
| 176 : | #warn __PACKAGE__, ": killCookie: about to add Set-Cookie header with this string: \"", $cookie->as_string, "\"\n"; | ||
| 177 : | sh002i | 1685 | $r->headers_out->set("Set-Cookie" => $cookie->as_string); |
| 178 : | } | ||
| 179 : | |||
| 180 : | sh002i | 1682 | # verify will return 1 if the person is who they say the are. If the |
| 181 : | # verification failed because of of invalid authentication data, a note will be | ||
| 182 : | # written in the request explaining why it failed. If the request failed because | ||
| 183 : | # no authentication data was provided, however, no note will be written, as this | ||
| 184 : | # is expected to happen whenever someone types in a URL manually, and is not | ||
| 185 : | # considered an error condition. | ||
| 186 : | malsyned | 305 | sub verify($) { |
| 187 : | my $self = shift; | ||
| 188 : | my $r = $self->{r}; | ||
| 189 : | sh002i | 1885 | my $ce = $r->ce; |
| 190 : | my $db = $r->db; | ||
| 191 : | malsyned | 305 | |
| 192 : | sh002i | 817 | my $practiceUserPrefix = $ce->{practiceUserPrefix}; |
| 193 : | my $debugPracticeUser = $ce->{debugPracticeUser}; | ||
| 194 : | |||
| 195 : | malsyned | 825 | my $force_passwd_authen = $r->param('force_passwd_authen'); |
| 196 : | sh002i | 1684 | my $login_practice_user = $r->param('login_practice_user'); |
| 197 : | my $send_cookie = $r->param("send_cookie"); | ||
| 198 : | sh002i | 1685 | |
| 199 : | malsyned | 441 | my $error; |
| 200 : | sh002i | 817 | my $failWithoutError = 0; |
| 201 : | sh002i | 1685 | my $credentialSource = "params"; |
| 202 : | malsyned | 313 | |
| 203 : | sh002i | 1685 | my $user = $r->param('user'); |
| 204 : | my $passwd = $r->param('passwd'); | ||
| 205 : | my $key = $r->param('key'); | ||
| 206 : | |||
| 207 : | sh002i | 1777 | my ($cookieUser, $cookieKey) = $self->fetchCookie; |
| 208 : | #warn __PACKAGE__, ": verify: cookieUser=$cookieUser cookieKey=$cookieKey\n"; | ||
| 209 : | sh002i | 1685 | |
| 210 : | sh002i | 817 | VERIFY: { |
| 211 : | # This block is here so we can "last" out of it when we've | ||
| 212 : | # decided whether we're going to succeed or fail. | ||
| 213 : | |||
| 214 : | sh002i | 1684 | if ($login_practice_user) { |
| 215 : | # ignore everything else, find an unused practice user | ||
| 216 : | my $found = 0; | ||
| 217 : | foreach my $userID (sort grep m/^$practiceUserPrefix/, $db->listUsers) { | ||
| 218 : | if (not $self->unexpiredKeyExists($userID)) { | ||
| 219 : | my $Key = $self->generateKey($userID); | ||
| 220 : | $db->addKey($Key); | ||
| 221 : | $r->param("user", $userID); | ||
| 222 : | $r->param("key", $Key->key); | ||
| 223 : | $found = 1; | ||
| 224 : | last; | ||
| 225 : | } | ||
| 226 : | } | ||
| 227 : | unless ($found) { | ||
| 228 : | $error = "No practice users are available. Please try again in a few minutes."; | ||
| 229 : | } | ||
| 230 : | last VERIFY; | ||
| 231 : | } | ||
| 232 : | |||
| 233 : | sh002i | 817 | # no authentication data was given. this is OK. |
| 234 : | unless (defined $user or defined $passwd or defined $key) { | ||
| 235 : | sh002i | 1683 | # check to see if a cookie was sent by the browser. if so, use the |
| 236 : | # user and key from the cookie for authentication. note that the | ||
| 237 : | # cookie is only used if no credentials are sent as parameters. | ||
| 238 : | if ($cookieUser and $cookieKey) { | ||
| 239 : | $user = $cookieUser; | ||
| 240 : | $key = $cookieKey; | ||
| 241 : | sh002i | 1684 | $r->param("user", $user); |
| 242 : | $r->param("key", $key); | ||
| 243 : | sh002i | 1685 | $credentialSource = "cookie"; |
| 244 : | sh002i | 1683 | } else { |
| 245 : | $failWithoutError = 1; | ||
| 246 : | last VERIFY; | ||
| 247 : | } | ||
| 248 : | sh002i | 817 | } |
| 249 : | |||
| 250 : | malsyned | 825 | if (defined $user and $force_passwd_authen) { |
| 251 : | $failWithoutError = 1; | ||
| 252 : | last VERIFY; | ||
| 253 : | } | ||
| 254 : | |||
| 255 : | # no user was supplied. somebody's building their own GET | ||
| 256 : | sh002i | 817 | unless ($user) { |
| 257 : | $error = "You must specify a username."; | ||
| 258 : | last VERIFY; | ||
| 259 : | } | ||
| 260 : | gage | 1724 | ######################################################## |
| 261 : | # Make sure user is in the database | ||
| 262 : | ######################################################## | ||
| 263 : | |||
| 264 : | my $userRecord = $db->getUser($user); | ||
| 265 : | unless (defined $userRecord) { # checked | ||
| 266 : | $error = "There is no account for $user in this course."; | ||
| 267 : | last VERIFY; | ||
| 268 : | } | ||
| 269 : | ######################################################## | ||
| 270 : | # Make sure the user's status is defined. | ||
| 271 : | ######################################################## | ||
| 272 : | unless (defined $userRecord->status) { | ||
| 273 : | $userRecord-> status('C'); | ||
| 274 : | sh002i | 1777 | #warn "Setting status for user $user to C. It was previously undefined."; |
| 275 : | gage | 1724 | } |
| 276 : | unless ($userRecord->status eq 'C') { | ||
| 277 : | $error = "The user $user has been dropped from this course. "; | ||
| 278 : | last VERIFY; | ||
| 279 : | |||
| 280 : | } | ||
| 281 : | ######################################################## | ||
| 282 : | sh002i | 817 | # it's a practice user. |
| 283 : | gage | 1724 | ######################################################## |
| 284 : | malsyned | 349 | if ($practiceUserPrefix and $user =~ /^$practiceUserPrefix/) { |
| 285 : | sh002i | 817 | # we're not interested in a practice user's password |
| 286 : | $r->param("passwd", ""); | ||
| 287 : | gage | 1724 | |
| 288 : | |||
| 289 : | sh002i | 817 | # we've got a key. |
| 290 : | if ($key) { | ||
| 291 : | if ($self->checkKey($user, $key)) { | ||
| 292 : | # they key was valid. | ||
| 293 : | last VERIFY; | ||
| 294 : | } else { | ||
| 295 : | # the key was invalid. | ||
| 296 : | malsyned | 827 | $error = "Your session has timed out due to inactivity. You must login again."; |
| 297 : | sh002i | 817 | last VERIFY; |
| 298 : | } | ||
| 299 : | } | ||
| 300 : | |||
| 301 : | # -- here we know that a key was not supplied. -- | ||
| 302 : | |||
| 303 : | # it's the debug user. | ||
| 304 : | if ($debugPracticeUser and $user eq $debugPracticeUser) { | ||
| 305 : | # clobber any existing session, valid or not. | ||
| 306 : | my $Key = $self->generateKey($user); | ||
| 307 : | sh002i | 912 | eval { $db->deleteKey($user) }; |
| 308 : | sh002i | 817 | $db->addKey($Key); |
| 309 : | $r->param("key", $Key->key()); | ||
| 310 : | last VERIFY; | ||
| 311 : | } | ||
| 312 : | |||
| 313 : | # an unexpired key exists -- the account is in use. | ||
| 314 : | if ($self->unexpiredKeyExists($user)) { | ||
| 315 : | $error = "That practice account is in use."; | ||
| 316 : | last VERIFY; | ||
| 317 : | } | ||
| 318 : | |||
| 319 : | # here we know the account is not in use, so we | ||
| 320 : | # generate a new session key (unexpiredKeyExists | ||
| 321 : | # deleted any expired key) and succeed! | ||
| 322 : | my $Key = $self->generateKey($user); | ||
| 323 : | $db->addKey($Key); | ||
| 324 : | $r->param("key", $Key->key()); | ||
| 325 : | last VERIFY; | ||
| 326 : | } | ||
| 327 : | |||
| 328 : | # -- here we know it's a regular user. -- | ||
| 329 : | gage | 1724 | |
| 330 : | ######################################################### | ||
| 331 : | # Fail with error message if status is D or dropped | ||
| 332 : | ######################################################### | ||
| 333 : | if ($db->getUser($user)->status eq 'D' or $db->getUser($user)->status eq 'DROPPED') { | ||
| 334 : | $error = "The user $user has been dropped from this course. Please contact | ||
| 335 : | your instructor if this is an error."; | ||
| 336 : | last VERIFY; | ||
| 337 : | sh002i | 817 | |
| 338 : | gage | 1724 | } |
| 339 : | sh002i | 817 | # a key was supplied. |
| 340 : | if ($key) { | ||
| 341 : | # we're not interested in a user's password if they're | ||
| 342 : | # supplying a key | ||
| 343 : | $r->param("passwd", ""); | ||
| 344 : | |||
| 345 : | if ($self->checkKey($user, $key)) { | ||
| 346 : | # valid key, so succeed. | ||
| 347 : | last VERIFY; | ||
| 348 : | malsyned | 349 | } else { |
| 349 : | sh002i | 817 | # invalid key. the login page doesn't propogate the key, |
| 350 : | # so we know this is an expired session. | ||
| 351 : | malsyned | 827 | $error = "Your session has timed out due to inactivity. You must login again."; |
| 352 : | sh002i | 817 | last VERIFY; |
| 353 : | malsyned | 349 | } |
| 354 : | } | ||
| 355 : | gage | 1724 | |
| 356 : | gage | 1721 | ######################################################### |
| 357 : | sh002i | 817 | # a password was supplied. |
| 358 : | gage | 1721 | ######################################################### |
| 359 : | sh002i | 817 | if ($passwd) { |
| 360 : | gage | 1721 | |
| 361 : | sh002i | 817 | if ($self->checkPassword($user, $passwd)) { |
| 362 : | # valid password, so create a new session. (we don't want | ||
| 363 : | # to reuse an old one, duh.) | ||
| 364 : | my $Key = $self->generateKey($user); | ||
| 365 : | sh002i | 912 | eval { $db->deleteKey($user) }; |
| 366 : | sh002i | 817 | $db->addKey($Key); |
| 367 : | $r->param("key", $Key->key()); | ||
| 368 : | # also delete the password | ||
| 369 : | $r->param("passwd", ""); | ||
| 370 : | last VERIFY; | ||
| 371 : | } else { | ||
| 372 : | # incorrect password. fail. | ||
| 373 : | $error = "Incorrect username or password."; | ||
| 374 : | last VERIFY; | ||
| 375 : | } | ||
| 376 : | malsyned | 313 | } |
| 377 : | sh002i | 817 | |
| 378 : | # neither a key or a password were supplied. | ||
| 379 : | $error = "You must enter a password." | ||
| 380 : | } | ||
| 381 : | |||
| 382 : | if (defined $error) { | ||
| 383 : | sh002i | 1685 | # authentication failed, store the error message |
| 384 : | sh002i | 817 | $r->notes("authen_error",$error); |
| 385 : | sh002i | 1685 | |
| 386 : | # if we got a cookie, it probably has incorrect information in it. so | ||
| 387 : | # we want to get rid of it | ||
| 388 : | if ($cookieUser or $cookieKey) { | ||
| 389 : | #warn "fail with error: killing cookie"; | ||
| 390 : | $self->killCookie; | ||
| 391 : | } | ||
| 392 : | |||
| 393 : | sh002i | 817 | return 0; |
| 394 : | sh002i | 1682 | } elsif ($failWithoutError) { |
| 395 : | sh002i | 1685 | # authentication failed, but we don't have any error message to report |
| 396 : | |||
| 397 : | # if we got a cookie, it probably has incorrect information in it. so | ||
| 398 : | # we want to get rid of it | ||
| 399 : | if ($cookieUser or $cookieKey) { | ||
| 400 : | #warn "fail without error: killing cookie"; | ||
| 401 : | $self->killCookie; | ||
| 402 : | } | ||
| 403 : | |||
| 404 : | sh002i | 1682 | return 0; |
| 405 : | malsyned | 313 | } else { |
| 406 : | sh002i | 1682 | # autentication succeeded! |
| 407 : | sh002i | 1685 | |
| 408 : | # we send a cookie if any of these conditions are met: | ||
| 409 : | # (a) a cookie was used for authentication | ||
| 410 : | # (b) a cookie was sent but not used for authentication, and the | ||
| 411 : | # credentials used for authentication were the same as those in | ||
| 412 : | # the cookie | ||
| 413 : | # (c) the user asked to have a cookie sent and is not a guest user. | ||
| 414 : | my $usedCookie = ($credentialSource eq "cookie") || 0; | ||
| 415 : | gage | 1694 | |
| 416 : | my $unusedCookieMatched = (defined($key) and defined($cookieUser) and defined($cookieKey) and | ||
| 417 : | $user eq $cookieUser and $key eq $cookieKey) || 0; | ||
| 418 : | sh002i | 1685 | my $userRequestsCookie = ($send_cookie and not $login_practice_user) || 0; |
| 419 : | #warn "usedCookie=$usedCookie\n"; | ||
| 420 : | #warn "unusedCookieMatched=$unusedCookieMatched\n"; | ||
| 421 : | #warn "userRequestsCookie=$userRequestsCookie\n"; | ||
| 422 : | if ($usedCookie or $unusedCookieMatched or $userRequestsCookie) { | ||
| 423 : | #warn "succeed: sending cookie"; | ||
| 424 : | sh002i | 1683 | $self->sendCookie($r->param("user"), $r->param("key")); |
| 425 : | sh002i | 1685 | } elsif ($cookieUser or $cookieKey) { |
| 426 : | # otherwise, we don't want any bad cookies sticking around | ||
| 427 : | #warn "succeed: killing cookie"; | ||
| 428 : | $self->killCookie; | ||
| 429 : | sh002i | 1683 | } |
| 430 : | sh002i | 1682 | return 1; |
| 431 : | malsyned | 305 | } |
| 432 : | malsyned | 313 | |
| 433 : | # Whatever you do, don't delete this! | ||
| 434 : | critical($r); | ||
| 435 : | sh002i | 1683 | # One time, I deleted it, and my mother broke her back, my cat died, and |
| 436 : | # the Pope got a tummy ache. When I replaced the line, I received eternal | ||
| 437 : | # salvation and a check for USD 500. | ||
| 438 : | malsyned | 305 | } |
| 439 : | |||
| 440 : | glarose | 2527 | sub verifyProctor ($) { |
| 441 : | my $self = shift(); | ||
| 442 : | my $r = $self->{r}; | ||
| 443 : | my $ce = $r->ce; | ||
| 444 : | my $db = $r->db; | ||
| 445 : | |||
| 446 : | my $user = $r->param('user'); | ||
| 447 : | my $proctorUser = $r->param('proctor_user'); | ||
| 448 : | my $proctorPasswd = $r->param('proctor_passwd'); | ||
| 449 : | my $proctorKey = $r->param('proctor_key'); | ||
| 450 : | |||
| 451 : | my $failWithoutError = 0; | ||
| 452 : | my $error = ''; | ||
| 453 : | |||
| 454 : | VERIFY: { | ||
| 455 : | unless( ( defined($proctorUser) && $proctorUser ) or | ||
| 456 : | ( defined($proctorPasswd) && $proctorPasswd ) or | ||
| 457 : | ( defined($proctorKey) && $proctorKey ) ) { | ||
| 458 : | $failWithoutError = 1; | ||
| 459 : | last VERIFY; | ||
| 460 : | } | ||
| 461 : | |||
| 462 : | unless( defined($proctorUser) ) { | ||
| 463 : | $error = 'Proctor username must be specified.'; | ||
| 464 : | last VERIFY; | ||
| 465 : | } | ||
| 466 : | |||
| 467 : | my $proctorUserRecord = $db->getUser( $proctorUser ); | ||
| 468 : | unless( defined( $proctorUserRecord ) ) { | ||
| 469 : | $error = "There is no proctor account for $proctorUser in this course"; | ||
| 470 : | last VERIFY; | ||
| 471 : | } | ||
| 472 : | |||
| 473 : | unless( ! defined( $proctorUserRecord->status() ) || | ||
| 474 : | $proctorUserRecord->status() eq 'C' ) { | ||
| 475 : | $error = "Proctor user $proctorUser does not have a valid status " . | ||
| 476 : | "in this course."; | ||
| 477 : | last VERIFY; | ||
| 478 : | } | ||
| 479 : | |||
| 480 : | if ( $proctorKey ) { | ||
| 481 : | $r->param( 'proctor_password', '' ); | ||
| 482 : | |||
| 483 : | if ( $self->checkKey("$user,$proctorUser", $proctorKey) ) { | ||
| 484 : | last VERIFY; | ||
| 485 : | } else { | ||
| 486 : | $error = "Invalid or expired proctor session key."; | ||
| 487 : | last VERIFY; | ||
| 488 : | } | ||
| 489 : | } | ||
| 490 : | |||
| 491 : | if ( $proctorPasswd ) { | ||
| 492 : | |||
| 493 : | if ( $self->checkPassword( $proctorUser, $proctorPasswd ) ) { | ||
| 494 : | my $newKeyObject = $self->generateKey( "$user,$proctorUser" ); | ||
| 495 : | $r->param('proctor_passwd', ''); | ||
| 496 : | |||
| 497 : | eval{ $db->deleteKey( "$user,$proctorUser" ); }; | ||
| 498 : | $db->addKey($newKeyObject); | ||
| 499 : | |||
| 500 : | $r->param('proctor_key', $newKeyObject->key()); | ||
| 501 : | |||
| 502 : | last VERIFY; | ||
| 503 : | } else { | ||
| 504 : | $error = 'Incorrect proctor username or password.'; | ||
| 505 : | last VERIFY; | ||
| 506 : | } | ||
| 507 : | } | ||
| 508 : | } | ||
| 509 : | |||
| 510 : | if ( defined($error) && $error ) { | ||
| 511 : | $r->notes("authen_error", $error); | ||
| 512 : | return 0; | ||
| 513 : | |||
| 514 : | } elsif ( $failWithoutError ) { | ||
| 515 : | return 0; | ||
| 516 : | |||
| 517 : | } else { | ||
| 518 : | return 1; | ||
| 519 : | } | ||
| 520 : | critical($r); # where does critical() come from? | ||
| 521 : | } | ||
| 522 : | |||
| 523 : | malsyned | 305 | 1; |
| 524 : | malsyned | 522 | |
| 525 : | __END__ | ||
| 526 : | |||
| 527 : | =head1 AUTHOR | ||
| 528 : | |||
| 529 : | sh002i | 1682 | Written by Dennis Lambe Jr., malsyned (at) math.rochester.edu, and Sam |
| 530 : | Hathaway, sh002i (at) math.rochester.edu. | ||
| 531 : | malsyned | 522 | |
| 532 : | =cut |
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