Annotation of loncom/auth/lonauth.pm, revision 1.136
1.136 ! kruse 1: # The LearningOnline Network
! 2: # User Authentication Module
! 3: #
! 4: # $Id: lonauth.pm,v 1.134 2014/04/30 21:51:30 raeburn Exp $
! 5: #
! 6: # Copyright Michigan State University Board of Trustees
! 7: #
! 8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
! 9: #
! 10: # LON-CAPA is free software; you can redistribute it and/or modify
! 11: # it under the terms of the GNU General Public License as published by
! 12: # the Free Software Foundation; either version 2 of the License, or
! 13: # (at your option) any later version.
! 14: #
! 15: # LON-CAPA is distributed in the hope that it will be useful,
! 16: # but WITHOUT ANY WARRANTY; without even the implied warranty of
! 17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
! 18: # GNU General Public License for more details.
! 19: #
! 20: # You should have received a copy of the GNU General Public License
! 21: # along with LON-CAPA; if not, write to the Free Software
! 22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
! 23: #
! 24: # /home/httpd/html/adm/gpl.txt
! 25: #
! 26: # http://www.lon-capa.org/
! 27: #
! 28:
! 29: package Apache::lonauth;
! 30:
! 31: use strict;
! 32: use LONCAPA;
! 33: use Apache::Constants qw(:common);
! 34: use CGI qw(:standard);
! 35: use DynaLoader; # for Crypt::DES version
! 36: use Crypt::DES;
! 37: use Apache::loncommon();
! 38: use Apache::lonnet;
! 39: use Apache::lonmenu();
! 40: use Apache::createaccount;
! 41: use Fcntl qw(:flock);
! 42: use Apache::lonlocal;
! 43: use Apache::File();
! 44: use HTML::Entities;
! 45:
! 46: # ------------------------------------------------------------ Successful login
! 47: sub success {
! 48: my ($r, $username, $domain, $authhost, $lowerurl, $extra_env,
! 49: $form) = @_;
! 50:
! 51: # ------------------------------------------------------------ Get cookie ready
! 52: my $cookie =
! 53: &Apache::loncommon::init_user_environment($r, $username, $domain,
! 54: $authhost, $form,
! 55: {'extra_env' => $extra_env,});
! 56:
! 57: my $public=($username eq 'public' && $domain eq 'public');
! 58:
! 59: if ($public or $lowerurl eq 'noredirect') { return $cookie; }
! 60:
! 61: # -------------------------------------------------------------------- Log this
! 62:
! 63: &Apache::lonnet::log($domain,$username,$authhost,
! 64: "Login $ENV{'REMOTE_ADDR'}");
! 65:
! 66: # ------------------------------------------------- Check for critical messages
! 67:
! 68: my @what=&Apache::lonnet::dump('critical',$domain,$username);
! 69: if ($what[0]) {
! 70: if (($what[0] ne 'con_lost') && ($what[0]!~/^error\:/)) {
! 71: $lowerurl='/adm/email?critical=display';
! 72: }
! 73: }
! 74:
! 75: # ------------------------------------------------------------ Get cookie ready
! 76: $cookie="lonID=$cookie; path=/";
! 77: # -------------------------------------------------------- Menu script and info
! 78: my $destination = $lowerurl;
! 79:
! 80: if (defined($form->{role})) {
! 81: my $envkey = 'user.role.'.$form->{role};
! 82: my $now=time;
! 83: my $then=$env{'user.login.time'};
! 84: my $refresh=$env{'user.refresh.time'};
! 85: my $update=$env{'user.update.time'};
! 86: if (!$update) {
! 87: $update = $then;
! 88: }
! 89: if (exists($env{$envkey})) {
! 90: my ($role,$where,$trolecode,$tstart,$tend,$tremark,$tstatus);
! 91: &Apache::lonnet::role_status($envkey,$update,$refresh,$now,\$role,\$where,
! 92: \$trolecode,\$tstatus,\$tstart,\$tend);
! 93: if ($tstatus eq 'is') {
! 94: $destination .= ($destination =~ /\?/) ? '&' : '?';
! 95: my $newrole = &HTML::Entities::encode($form->{role},'"<>&');
! 96: $destination .= 'selectrole=1&'.$newrole.'=1';
! 97: }
! 98: }
! 99: }
! 100: if (defined($form->{symb})) {
! 101: my $destsymb = $form->{symb};
! 102: $destination .= ($destination =~ /\?/) ? '&' : '?';
! 103: if ($destsymb =~ /___/) {
! 104: # FIXME Need to deal with encrypted symbs and urls as needed.
! 105: my ($map,$resid,$desturl)=split(/___/,$destsymb);
! 106: unless ($desturl=~/^(adm|editupload|public)/) {
! 107: $desturl = &Apache::lonnet::clutter($desturl);
! 108: }
! 109: $desturl = &HTML::Entities::encode($desturl,'"<>&');
! 110: $destsymb = &HTML::Entities::encode($destsymb,'"<>&');
! 111: $destination .= 'destinationurl='.$desturl.
! 112: '&destsymb='.$destsymb;
! 113: } else {
! 114: $destsymb = &HTML::Entities::encode($destsymb,'"<>&');
! 115: $destination .= 'destinationurl='.$destsymb;
! 116: }
! 117: }
! 118: if ($destination =~ m{^/adm/roles}) {
! 119: $destination .= ($destination =~ /\?/) ? '&' : '?';
! 120: $destination .= 'source=login';
! 121: }
! 122:
! 123: my $windowinfo = Apache::lonhtmlcommon::scripttag('self.name="loncapaclient";');
! 124: my $header = '<meta HTTP-EQUIV="Refresh" CONTENT="0; url='.$destination.'" />';
! 125: my $brcrum = [{'href' => '',
! 126: 'text' => 'Successful Login'},];
! 127: my $start_page=&Apache::loncommon::start_page('Successful Login',
! 128: $header,
! 129: {'bread_crumbs' => $brcrum,});
! 130: my $end_page =&Apache::loncommon::end_page();
! 131:
! 132: my $continuelink='<a href="'.$destination.'">'.&mt('Continue').'</a>';
! 133: # ------------------------------------------------- Output for successful login
! 134:
! 135: &Apache::loncommon::content_type($r,'text/html');
! 136: $r->header_out('Set-cookie' => $cookie);
! 137: $r->send_http_header;
! 138:
! 139: my %lt=&Apache::lonlocal::texthash(
! 140: 'wel' => 'Welcome',
! 141: 'pro' => 'Login problems?',
! 142: );
! 143: my $loginhelp = &loginhelpdisplay($domain);
! 144: if ($loginhelp) {
! 145: $loginhelp = '<p><a href="'.$loginhelp.'">'.$lt{'pro'}.'</a></p>';
! 146: }
! 147:
! 148: my $welcome = &mt('Welcome to the Learning[_1]Online[_2] Network with CAPA. Please wait while your session is being set up.','<i>','</i>');
! 149: $r->print(<<ENDSUCCESS);
! 150: $start_page
! 151: $windowinfo
! 152: <h1>$lt{'wel'}</h1>
! 153: $welcome
! 154: $loginhelp
! 155: $continuelink
! 156: $end_page
! 157: ENDSUCCESS
! 158: return;
! 159: }
! 160:
! 161: # --------------------------------------------------------------- Failed login!
! 162:
! 163: sub failed {
! 164: my ($r,$message,$form) = @_;
! 165: (undef,undef,undef,my $clientmathml,my $clientunicode) =
! 166: &Apache::loncommon::decode_user_agent();
! 167: my $args = {};
! 168: if ($clientunicode && !$clientmathml) {
! 169: $args = {'browser.unicode' => 1};
! 170: }
! 171:
! 172: my $start_page = &Apache::loncommon::start_page('Unsuccessful Login',undef,$args);
! 173: my $uname = &Apache::loncommon::cleanup_html($form->{'uname'});
! 174: my $udom = &Apache::loncommon::cleanup_html($form->{'udom'});
! 175: if (&Apache::lonnet::domain($udom,'description') eq '') {
! 176: undef($udom);
! 177: }
! 178: my $retry = '/adm/login';
! 179: if ($uname eq $form->{'uname'}) {
! 180: $retry .= '?username='.$uname;
! 181: }
! 182: if ($udom) {
! 183: $retry .= (($retry=~/\?/)?'&':'?').'domain='.$udom;
! 184: }
! 185: if (exists($form->{role})) {
! 186: my $role = &Apache::loncommon::cleanup_html($form->{role});
! 187: if ($role ne '') {
! 188: $retry .= (($retry=~/\?/)?'&':'?').'role='.$role;
! 189: }
! 190: }
! 191: if (exists($form->{symb})) {
! 192: my $symb = &Apache::loncommon::cleanup_html($form->{symb});
! 193: if ($symb ne '') {
! 194: $retry .= (($retry=~/\?/)?'&':'?').'symb='.$symb;
! 195: }
! 196: }
! 197: my $end_page = &Apache::loncommon::end_page();
! 198: &Apache::loncommon::content_type($r,'text/html');
! 199: $r->send_http_header;
! 200: my @actions =
! 201: (&mt('Please [_1]log in again[_2].','<a href="'.$retry.'">','</a>'));
! 202: my $loginhelp = &loginhelpdisplay($udom);
! 203: if ($loginhelp) {
! 204: push(@actions, '<a href="'.$loginhelp.'">'.&mt('Login problems?').'</a>');
! 205: }
! 206: #FIXME: link to helpdesk might be added here
! 207:
! 208: $r->print(
! 209: $start_page
! 210: .'<h2>'.&mt('Sorry ...').'</h2>'
! 211: .&Apache::lonhtmlcommon::confirm_success(&mt($message),1).'<br /><br />'
! 212: .&Apache::lonhtmlcommon::actionbox(\@actions)
! 213: .$end_page
! 214: );
! 215: }
! 216:
! 217: # ------------------------------------------------------------------ Rerouting!
! 218:
! 219: sub reroute {
! 220: my ($r) = @_;
! 221: &Apache::loncommon::content_type($r,'text/html');
! 222: $r->send_http_header;
! 223: my $msg='<b>'.&mt('Sorry ...').'</b><br />'
! 224: .&mt('Please [_1]log in again[_2].');
! 225: &Apache::loncommon::simple_error_page($r,'Rerouting',$msg,{'no_auto_mt_msg' => 1});
! 226: }
! 227:
! 228: # ---------------------------------------------------------------- Main handler
! 229:
! 230: sub handler {
! 231: my $r = shift;
! 232: my $londocroot = $r->dir_config('lonDocRoot');
! 233: my $form;
! 234: # Are we re-routing?
! 235: if (-e "$londocroot/lon-status/reroute.txt") {
! 236: &reroute($r);
! 237: return OK;
! 238: }
! 239:
! 240: &Apache::lonlocal::get_language_handle($r);
! 241:
! 242: # -------------------------------- Prevent users from attempting to login twice
! 243: my $handle = &Apache::lonnet::check_for_valid_session($r);
! 244: if ($handle ne '') {
! 245: my $lonidsdir=$r->dir_config('lonIDsDir');
! 246: if ($handle=~/^publicuser\_/) {
! 247: # For "public user" - remove it, we apparently really want to login
! 248: unlink($r->dir_config('lonIDsDir')."/$handle.id");
! 249: } else {
! 250: # Indeed, a valid token is found
! 251: &Apache::lonnet::transfer_profile_to_env($lonidsdir,$handle);
! 252: &Apache::loncommon::content_type($r,'text/html');
! 253: $r->send_http_header;
! 254: my $start_page =
! 255: &Apache::loncommon::start_page('Already logged in');
! 256: my $end_page =
! 257: &Apache::loncommon::end_page();
! 258: my $dest = '/adm/roles';
! 259: if ($env{'form.firsturl'} ne '') {
! 260: $dest = $env{'form.firsturl'};
! 261: }
! 262: $r->print(
! 263: $start_page
! 264: .'<p class="LC_warning">'.&mt('You are already logged in!').'</p>'
! 265: .'<p>'.&mt('Please either [_1]continue the current session[_2] or [_3]log out[_4].'
! 266: ,'<a href="'.$dest.'">','</a>','<a href="/adm/logout">','</a>')
! 267: .'</p>'
! 268: .$end_page
! 269: );
! 270: return OK;
! 271: }
! 272: }
! 273:
! 274: # ---------------------------------------------------- No valid token, continue
! 275:
! 276:
! 277: my $buffer;
! 278: if ($r->header_in('Content-length') > 0) {
! 279: $r->read($buffer,$r->header_in('Content-length'),0);
! 280: }
! 281: my %form;
! 282: foreach my $pair (split(/&/,$buffer)) {
! 283: my ($name,$value) = split(/=/,$pair);
! 284: $value =~ tr/+/ /;
! 285: $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
! 286: $form{$name}=$value;
! 287: }
! 288:
! 289: if ((!$form{'uname'}) || (!$form{'upass0'}) || (!$form{'udom'})) {
! 290: &failed($r,'Username, password and domain need to be specified.',
! 291: \%form);
! 292: return OK;
! 293: }
! 294:
! 295: # split user logging in and "su"-user
! 296:
! 297: ($form{'uname'},$form{'suname'})=split(/\:/,$form{'uname'});
! 298: $form{'uname'} = &LONCAPA::clean_username($form{'uname'});
! 299: $form{'suname'}= &LONCAPA::clean_username($form{'suname'});
! 300: $form{'udom'} = &LONCAPA::clean_domain( $form{'udom'});
! 301:
! 302: my $role = $r->dir_config('lonRole');
! 303: my $domain = $r->dir_config('lonDefDomain');
! 304: my $prodir = $r->dir_config('lonUsersDir');
! 305: my $contact_name = &mt('LON-CAPA helpdesk');
! 306:
! 307: # ---------------------------------------- Get the information from login token
! 308:
! 309: my $tmpinfo=Apache::lonnet::reply('tmpget:'.$form{'logtoken'},
! 310: $form{'serverid'});
! 311:
! 312: my %sessiondata;
! 313: if ($form{'iptoken'}) {
! 314: %sessiondata = &Apache::lonnet::tmpget($form{'iptoken'});
! 315: my $delete = &Apache::lonnet::tmpdel($form{'iptoken'});
! 316: }
! 317:
! 318: if (($tmpinfo=~/^error/) || ($tmpinfo eq 'con_lost') ||
! 319: ($tmpinfo eq 'no_such_host')) {
! 320: &failed($r,'Information needed to verify your login information is missing, inaccessible or expired.',\%form);
! 321: return OK;
! 322: } else {
! 323: my $reply = &Apache::lonnet::reply('tmpdel:'.$form{'logtoken'},
! 324: $form{'serverid'});
! 325: if ( $reply ne 'ok' ) {
! 326: &failed($r,'Session could not be opened.',\%form);
! 327: &Apache::lonnet::logthis("ERROR got a reply of $reply when trying to contact ". $form{'serverid'}." to get login token");
! 328: return OK;
! 329: }
! 330: }
! 331:
! 332: if (!&Apache::lonnet::domain($form{'udom'})) {
! 333: &failed($r,'The domain you provided is not a valid LON-CAPA domain.',\%form);
! 334: return OK;
! 335: }
! 336:
! 337: my ($key,$firsturl,$rolestr,$symbstr)=split(/&/,$tmpinfo);
! 338: if ($rolestr) {
! 339: $rolestr = &unescape($rolestr);
! 340: }
! 341: if ($symbstr) {
! 342: $symbstr= &unescape($symbstr);
! 343: }
! 344: if ($rolestr =~ /^role=/) {
! 345: (undef,$form{'role'}) = split('=',$rolestr);
! 346: }
! 347: if ($symbstr =~ /^symb=/) {
! 348: (undef,$form{'symb'}) = split('=',$symbstr);
! 349: }
! 350:
! 351: my $upass = $ENV{HTTPS} ? join("", @form{qw(upass0 upass1 upass2)})
! 352: : decrypt($key, @form{qw(upass0 upass1 upass2)});
! 353:
! 354: # ---------------------------------------------------------------- Authenticate
! 355:
! 356: my %domconfig = &Apache::lonnet::get_dom('configuration',['usercreation'],$form{'udom'});
! 357: my ($cancreate,$statustocreate) =
! 358: &Apache::createaccount::get_creation_controls($form{'udom'},$domconfig{'usercreation'});
! 359: my $defaultauth;
! 360: if (ref($cancreate) eq 'ARRAY') {
! 361: if (grep(/^login$/,@{$cancreate})) {
! 362: $defaultauth = 1;
! 363: }
! 364: }
! 365: my $clientcancheckhost = 1;
! 366: my $authhost=Apache::lonnet::authenticate($form{'uname'},$upass,
! 367: $form{'udom'},$defaultauth,
! 368: $clientcancheckhost);
! 369:
! 370: # --------------------------------------------------------------------- Failed?
! 371:
! 372: if ($authhost eq 'no_host') {
! 373: &failed($r,'Username and/or password could not be authenticated.',
! 374: \%form);
! 375: return OK;
! 376: } elsif ($authhost eq 'no_account_on_host') {
! 377: if ($defaultauth) {
! 378: my $domdesc = &Apache::lonnet::domain($form{'udom'},'description');
! 379: unless (&check_can_host($r,\%form,'no_account_on_host',$domdesc)) {
! 380: return OK;
! 381: }
! 382: my $start_page =
! 383: &Apache::loncommon::start_page('Create a user account in LON-CAPA');
! 384: my $lonhost = $r->dir_config('lonHostID');
! 385: my $origmail = $Apache::lonnet::perlvar{'lonSupportEMail'};
! 386: my $contacts =
! 387: &Apache::loncommon::build_recipient_list(undef,'helpdeskmail',
! 388: $form{'udom'},$origmail);
! 389: my ($contact_email) = split(',',$contacts);
! 390: my $output =
! 391: &Apache::createaccount::username_check($form{'uname'},$form{'udom'},
! 392: $domdesc,'',$lonhost,
! 393: $contact_email,$contact_name,
! 394: undef,$statustocreate);
! 395: &Apache::loncommon::content_type($r,'text/html');
! 396: $r->send_http_header;
! 397: &Apache::createaccount::print_header($r,$start_page);
! 398: $r->print('<h3>'.&mt('Account creation').'</h3>'.
! 399: &mt('Although your username and password were authenticated, you do not currently have a LON-CAPA account at this institution.').'<br />'.
! 400: $output.&Apache::loncommon::end_page());
! 401: return OK;
! 402: } else {
! 403: &failed($r,'Although your username and password were authenticated, you do not currently have a LON-CAPA account in this domain, and you are not permitted to create one.',\%form);
! 404: return OK;
! 405: }
! 406: }
! 407:
! 408: if (($firsturl eq '') ||
! 409: ($firsturl=~/^\/adm\/(logout|remote)/)) {
! 410: $firsturl='/adm/roles';
! 411: }
! 412:
! 413: my $hosthere;
! 414: if ($form{'iptoken'}) {
! 415: if (($sessiondata{'domain'} eq $form{'udom'}) &&
! 416: ($sessiondata{'username'} eq $form{'uname'})) {
! 417: $hosthere = 1;
! 418: }
! 419: }
! 420:
! 421: # --------------------------------- Are we attempting to login as somebody else?
! 422: if ($form{'suname'}) {
! 423: # ------------ see if the original user has enough privileges to pull this stunt
! 424: if (&Apache::lonnet::privileged($form{'uname'},$form{'udom'})) {
! 425: # ---------------------------------------------------- see if the su-user exists
! 426: unless (&Apache::lonnet::homeserver($form{'suname'},$form{'udom'})
! 427: eq 'no_host') {
! 428: &Apache::lonnet::logthis(&Apache::lonnet::homeserver($form{'suname'},$form{'udom'}));
! 429: # ------------------------------ see if the su-user is not too highly privileged
! 430: unless (&Apache::lonnet::privileged($form{'suname'},$form{'udom'})) {
! 431: # -------------------------------------------------------- actually switch users
! 432: &Apache::lonnet::logperm('User '.$form{'uname'}.' at '.$form{'udom'}.
! 433: ' logging in as '.$form{'suname'});
! 434: $form{'uname'}=$form{'suname'};
! 435: } else {
! 436: &Apache::lonnet::logthis('Attempted switch user to privileged user');
! 437: }
! 438: }
! 439: } else {
! 440: &Apache::lonnet::logthis('Non-privileged user attempting switch user');
! 441: }
! 442: }
! 443:
! 444: my ($is_balancer,$otherserver);
! 445:
! 446: unless ($hosthere) {
! 447: ($is_balancer,$otherserver) =
! 448: &Apache::lonnet::check_loadbalancing($form{'uname'},$form{'udom'});
! 449: }
! 450:
! 451: if ($is_balancer) {
! 452: if (!$otherserver) {
! 453: ($otherserver) = &Apache::lonnet::choose_server($form{'udom'});
! 454: }
! 455: if ($otherserver) {
! 456: &success($r,$form{'uname'},$form{'udom'},$authhost,'noredirect',undef,
! 457: \%form);
! 458: my $switchto = '/adm/switchserver?otherserver='.$otherserver;
! 459: if (($firsturl) && ($firsturl ne '/adm/switchserver') && ($firsturl ne '/adm/roles')) {
! 460: $switchto .= '&origurl='.$firsturl;
! 461: }
! 462: if ($form{'role'}) {
! 463: $switchto .= '&role='.$form{'role'};
! 464: }
! 465: if ($form{'symb'}) {
! 466: $switchto .= '&symb='.$form{'symb'};
! 467: }
! 468: $r->internal_redirect($switchto);
! 469: } else {
! 470: $r->print(&noswitch());
! 471: }
! 472: return OK;
! 473: } else {
! 474: if (!&check_can_host($r,\%form,$authhost)) {
! 475: my ($otherserver) = &Apache::lonnet::choose_server($form{'udom'});
! 476: if ($otherserver) {
! 477: &success($r,$form{'uname'},$form{'udom'},$authhost,'noredirect',undef,
! 478: \%form);
! 479: my $switchto = '/adm/switchserver?otherserver='.$otherserver;
! 480: if (($firsturl) && ($firsturl ne '/adm/switchserver') && ($firsturl ne '/adm/roles')) {
! 481: $switchto .= '&origurl='.$firsturl;
! 482: }
! 483: if ($form{'role'}) {
! 484: $switchto .= '&role='.$form{'role'};
! 485: }
! 486: if ($form{'symb'}) {
! 487: $switchto .= '&symb='.$form{'symb'};
! 488: }
! 489: $r->internal_redirect($switchto);
! 490: } else {
! 491: $r->print(&noswitch());
! 492: }
! 493: return OK;
! 494: }
! 495:
! 496: # ------------------------------------------------------- Do the load balancing
! 497:
! 498: # ---------------------------------------------------------- Determine own load
! 499: my $loadlim = $r->dir_config('lonLoadLim');
! 500: my $loadavg;
! 501: {
! 502: my $loadfile=Apache::File->new('/proc/loadavg');
! 503: $loadavg=<$loadfile>;
! 504: }
! 505: $loadavg =~ s/\s.*//g;
! 506: my $loadpercent=sprintf("%.1f",100*$loadavg/$loadlim);
! 507: my $userloadpercent=&Apache::lonnet::userload();
! 508:
! 509: # ---------------------------------------------------------- Are we overloaded?
! 510: if ((($userloadpercent>100.0)||($loadpercent>100.0))) {
! 511: my $unloaded=Apache::lonnet::spareserver($loadpercent,$userloadpercent,1,$form{'udom'});
! 512: if (!$unloaded) {
! 513: ($unloaded) = &Apache::lonnet::choose_server($form{'udom'});
! 514: }
! 515: if ($unloaded) {
! 516: &success($r,$form{'uname'},$form{'udom'},$authhost,'noredirect',
! 517: undef,\%form);
! 518: $r->internal_redirect('/adm/switchserver?otherserver='.$unloaded.'&origurl='.$firsturl);
! 519: return OK;
! 520: }
! 521: }
! 522: &success($r,$form{'uname'},$form{'udom'},$authhost,$firsturl,undef,
! 523: \%form);
! 524: return OK;
! 525: }
! 526: }
! 527:
! 528: sub decrypt {
! 529: my ($key, @chunks) = @_;
! 530:
! 531: my $keybin = pack("H16",$key);
! 532:
! 533: my $cipher;
! 534: if ($Crypt::DES::VERSION >= 2.03) {
! 535: $cipher = new Crypt::DES $keybin;
! 536: } else {
! 537: $cipher = new DES $keybin;
! 538: }
! 539:
! 540: my $upass='';
! 541: for (my $i=0;$i<=2;$i++) {
! 542: my $chunk =
! 543: $cipher->decrypt(
! 544: unpack("a8",pack("H16",substr($chunks[$i],0,16))));
! 545:
! 546: $chunk .=
! 547: $cipher->decrypt(
! 548: unpack("a8",pack("H16",substr($chunks[$i],16,16))));
! 549:
! 550: $chunk = substr($chunk,1,ord(substr($chunk,0,1)));
! 551: $upass .= $chunk;
! 552: }
! 553: return $upass;
! 554: }
! 555:
! 556: sub check_can_host {
! 557: my ($r,$form,$authhost,$domdesc) = @_;
! 558: return unless (ref($form) eq 'HASH');
! 559: my $canhost = 1;
! 560: my $lonhost = $r->dir_config('lonHostID');
! 561: my $udom = $form->{'udom'};
! 562: my @intdoms;
! 563: my $internet_names = &Apache::lonnet::get_internet_names($lonhost);
! 564: if (ref($internet_names) eq 'ARRAY') {
! 565: @intdoms = @{$internet_names};
! 566: }
! 567: my $uprimary_id = &Apache::lonnet::domain($udom,'primary');
! 568: my $uint_dom = &Apache::lonnet::internet_dom($uprimary_id);
! 569: unless ($uint_dom ne '' && grep(/^\Q$uint_dom\E$/,@intdoms)) {
! 570: my $machine_dom = &Apache::lonnet::host_domain($lonhost);
! 571: my $hostname = &Apache::lonnet::hostname($lonhost);
! 572: my $serverhomeID = &Apache::lonnet::get_server_homeID($hostname);
! 573: my $serverhomedom = &Apache::lonnet::host_domain($serverhomeID);
! 574: my %defdomdefaults = &Apache::lonnet::get_domain_defaults($serverhomedom);
! 575: my %udomdefaults = &Apache::lonnet::get_domain_defaults($udom);
! 576: my $loncaparev;
! 577: if ($authhost eq 'no_account_on_host') {
! 578: $loncaparev = &Apache::lonnet::get_server_loncaparev($machine_dom);
! 579: } else {
! 580: $loncaparev = &Apache::lonnet::get_server_loncaparev($machine_dom,$lonhost);
! 581: }
! 582: $canhost = &Apache::lonnet::can_host_session($udom,$lonhost,$loncaparev,
! 583: $udomdefaults{'remotesessions'},
! 584: $defdomdefaults{'hostedsessions'});
! 585: }
! 586: unless ($canhost) {
! 587: if ($authhost eq 'no_account_on_host') {
! 588: my $checkloginvia = 1;
! 589: my ($login_host,$hostname) =
! 590: &Apache::lonnet::choose_server($udom,$checkloginvia);
! 591: &Apache::loncommon::content_type($r,'text/html');
! 592: $r->send_http_header;
! 593: if ($login_host ne '') {
! 594: my $protocol = $Apache::lonnet::protocol{$login_host};
! 595: $protocol = 'http' if ($protocol ne 'https');
! 596: my $newurl = $protocol.'://'.$hostname.'/adm/createaccount';
! 597: $r->print(&Apache::loncommon::start_page('Create a user account in LON-CAPA').
! 598: '<h3>'.&mt('Account creation').'</h3>'.
! 599: &mt('You do not currently have a LON-CAPA account at this institution.').'<br />'.
! 600: '<p>'.&mt('You will be able to create one by logging into a LON-CAPA server within the [_1] domain.',$domdesc).'</p>'.
! 601: '<p>'.&mt('[_1]Log in[_2]','<a href="'.$newurl.'">','</a>').
! 602: &Apache::loncommon::end_page());
! 603: } else {
! 604: $r->print(&Apache::loncommon::start_page('Access to LON-CAPA unavailable').
! 605: '<h3>'.&mt('Account creation unavailable').'</h3>'.
! 606: &mt('You do not currently have a LON-CAPA account at this institution.').'<br />'.
! 607: '<p>'.&mt('Currently a LON-CAPA server is not available within the [_1] domain for you to log-in to, to create an account.',$domdesc).'</p>'.
! 608: &Apache::loncommon::end_page());
! 609: }
! 610: } else {
! 611: &success($r,$form->{'uname'},$udom,$authhost,'noredirect',undef,
! 612: $form);
! 613: my ($otherserver) = &Apache::lonnet::choose_server($udom);
! 614: $r->internal_redirect('/adm/switchserver?otherserver='.$otherserver);
! 615: }
! 616: }
! 617: return $canhost;
! 618: }
! 619:
! 620: sub noswitch {
! 621: my $result = &Apache::loncommon::start_page('Access to LON-CAPA unavailable').
! 622: '<h3>'.&mt('Session unavailable').'</h3>'.
! 623: &mt('This LON-CAPA server is unable to host your session.').'<br />'.
! 624: '<p>'.&mt('Currently no other LON-CAPA server is available to host your session either.').'</p>'.
! 625: &Apache::loncommon::end_page();
! 626: return $result;
! 627: }
! 628:
! 629: sub loginhelpdisplay {
! 630: my ($authdomain) = @_;
! 631: my $login_help = 1;
! 632: my $lang = &Apache::lonlocal::current_language();
! 633: if ($login_help) {
! 634: my $dom = $authdomain;
! 635: if ($dom eq '') {
! 636: $dom = &Apache::lonnet::default_login_domain();
! 637: }
! 638: my %domconfhash = &Apache::loncommon::get_domainconf($dom);
! 639: my $loginhelp_url;
! 640: if ($lang) {
! 641: $loginhelp_url = $domconfhash{$dom.'.login.helpurl_'.$lang};
! 642: if ($loginhelp_url ne '') {
! 643: return $loginhelp_url;
! 644: }
! 645: }
! 646: $loginhelp_url = $domconfhash{$dom.'.login.helpurl_nolang'};
! 647: if ($loginhelp_url ne '') {
! 648: return $loginhelp_url;
! 649: } else {
! 650: return '/adm/loginproblems.html';
! 651: }
! 652: }
! 653: return;
! 654: }
! 655:
! 656: 1;
! 657: __END__
! 658:
! 659:
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