loncom/auth/lonauth.pm - view

File: [LON-CAPA] / loncom / auth / lonauth.pm
Revision 1.121.2.1: download - view: text, annotated - select for diffs
Mon Aug 6 23:14:04 2012 UTC (11 years, 10 months ago) by raeburn
Branches: version_2_11_X

- For 2.11.
  - Remote Control retained in 2.11.
  - Reverse changes in lonauth.pm rev 1.102, 1.104.
  - reverse changes in lonlogout.pm rev 1.38, 1.39, 1.40, 1.41.

1: # The LearningOnline Network 2: # User Authentication Module 3: # 4: # $Id: lonauth.pm,v 1.121.2.1 2012/08/06 23:14:04 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|uploaded|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 $windowinfo=&Apache::lonmenu::open($env{'browser.os'}); 124: my $startupremote=&Apache::lonmenu::startupremote($destination); 125: my $remoteinfo=&Apache::lonmenu::load_remote_msg($lowerurl); 126: my $setflags=&Apache::lonmenu::setflags(); 127: my $maincall=&Apache::lonmenu::maincall(); 128: my $brcrum = [{'href' => '', 129: 'text' => 'Successful Login'},]; 130: my $start_page=&Apache::loncommon::start_page('Successful Login', 131: $startupremote, 132: {'no_inline_link' => 1, 133: 'bread_crumbs' => $brcrum,}); 134: my $end_page =&Apache::loncommon::end_page(); 135: 136: my $continuelink; 137: if ($env{'environment.remote'} eq 'off') { 138: $continuelink='<a href="'.$destination.'">'.&mt('Continue').'</a>'; 139: } 140: # ------------------------------------------------- Output for successful login 141: 142: &Apache::loncommon::content_type($r,'text/html'); 143: $r->header_out('Set-cookie' => $cookie); 144: $r->send_http_header; 145: 146: my %lt=&Apache::lonlocal::texthash( 147: 'wel' => 'Welcome', 148: 'pro' => 'Login problems?', 149: 'log' => 'loginproblems.html', 150: ); 151: my $welcome = &mt('Welcome to the Learning[_1]Online[_2] Network with CAPA. Please wait while your session is being set up.','<i>','</i>'); 152: $r->print(<<ENDSUCCESS); 153: $start_page 154: $setflags 155: $windowinfo 156: <h1>$lt{'wel'}</h1> 157: $welcome<p> 158: <a href="/adm/$lt{'log'}">$lt{'pro'}</a></p> 159: $remoteinfo 160: $maincall 161: $continuelink 162: $end_page 163: ENDSUCCESS 164: } 165: 166: # --------------------------------------------------------------- Failed login! 167: 168: sub failed { 169: my ($r,$message,$form) = @_; 170: my $start_page = &Apache::loncommon::start_page('Unsuccessful Login',undef); 171: my $retry = '/adm/login?username='.$form->{'uname'}. 172: '&domain='.$form->{'udom'}; 173: if (exists($form->{role})) { 174: $retry .= '&role='.$form->{role}; 175: } 176: if (exists($form->{symb})) { 177: $retry .= '&symb='.$form->{symb}; 178: } 179: my $end_page = &Apache::loncommon::end_page(); 180: &Apache::loncommon::content_type($r,'text/html'); 181: $r->send_http_header; 182: $r->print( 183: $start_page 184: .'<h1>'.&mt('Sorry ...').'</h1>' 185: .'<p class="LC_warning">'.&mt($message).'</p>' 186: .'<p>'.&mt('Please [_1]log in again[_2].','<a href="'.$retry.'">','</a>') 187: .'</p>' 188: .'<p><a href="/adm/loginproblems.html">'.&mt('Login problems?').'</a></p>' 189: .$end_page 190: ); 191: } 192: 193: # ------------------------------------------------------------------ Rerouting! 194: 195: sub reroute { 196: my ($r) = @_; 197: &Apache::loncommon::content_type($r,'text/html'); 198: $r->send_http_header; 199: my $msg='<h1>'.&mt('Sorry ...').'</h1>' 200: .&mt('Please [_1]log in again[_2].'); 201: &Apache::loncommon::simple_error_page($r,'Rerouting',$msg); 202: } 203: 204: # ---------------------------------------------------------------- Main handler 205: 206: sub handler { 207: my $r = shift; 208: my $londocroot = $r->dir_config('lonDocRoot'); 209: my $form; 210: # Are we re-routing? 211: if (-e "$londocroot/lon-status/reroute.txt") { 212: &reroute($r); 213: return OK; 214: } 215: 216: &Apache::lonlocal::get_language_handle($r); 217: 218: # -------------------------------- Prevent users from attempting to login twice 219: my $handle = &Apache::lonnet::check_for_valid_session($r); 220: if ($handle ne '') { 221: my $lonidsdir=$r->dir_config('lonIDsDir'); 222: if ($handle=~/^publicuser\_/) { 223: # For "public user" - remove it, we apparently really want to login 224: unlink($r->dir_config('lonIDsDir')."/$handle.id"); 225: } else { 226: # Indeed, a valid token is found 227: &Apache::lonnet::transfer_profile_to_env($lonidsdir,$handle); 228: &Apache::loncommon::content_type($r,'text/html'); 229: $r->send_http_header; 230: my $start_page = 231: &Apache::loncommon::start_page('Already logged in'); 232: my $end_page = 233: &Apache::loncommon::end_page(); 234: my $dest = '/adm/roles'; 235: if ($env{'form.firsturl'} ne '') { 236: $dest = $env{'form.firsturl'}; 237: } 238: $r->print( 239: $start_page 240: .'<p class="LC_warning>"'.&mt('You are already logged in!').'</p>' 241: .'<p>'.&mt('Please either [_1]continue the current session[_2] or [_3]log out[_4].' 242: ,'<a href="'.$dest.'">','</a>','<a href="/adm/logout">','</a>') 243: .'</p>' 244: .$end_page 245: ); 246: return OK; 247: } 248: } 249: 250: # ---------------------------------------------------- No valid token, continue 251: 252: 253: my $buffer; 254: if ($r->header_in('Content-length') > 0) { 255: $r->read($buffer,$r->header_in('Content-length'),0); 256: } 257: my %form; 258: foreach my $pair (split(/&/,$buffer)) { 259: my ($name,$value) = split(/=/,$pair); 260: $value =~ tr/+/ /; 261: $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg; 262: $form{$name}=$value; 263: } 264: 265: if ((!$form{'uname'}) || (!$form{'upass0'}) || (!$form{'udom'})) { 266: &failed($r,'Username, password and domain need to be specified.', 267: \%form); 268: return OK; 269: } 270: 271: # split user logging in and "su"-user 272: 273: ($form{'uname'},$form{'suname'})=split(/\:/,$form{'uname'}); 274: $form{'uname'} = &LONCAPA::clean_username($form{'uname'}); 275: $form{'suname'}= &LONCAPA::clean_username($form{'suname'}); 276: $form{'udom'} = &LONCAPA::clean_domain( $form{'udom'}); 277: 278: my $role = $r->dir_config('lonRole'); 279: my $domain = $r->dir_config('lonDefDomain'); 280: my $prodir = $r->dir_config('lonUsersDir'); 281: my $contact_name = &mt('LON-CAPA helpdesk'); 282: 283: # ---------------------------------------- Get the information from login token 284: 285: my $tmpinfo=Apache::lonnet::reply('tmpget:'.$form{'logtoken'}, 286: $form{'serverid'}); 287: 288: if (($tmpinfo=~/^error/) || ($tmpinfo eq 'con_lost') || 289: ($tmpinfo eq 'no_such_host')) { 290: &failed($r,'Information needed to verify your login information is missing, inaccessible or expired.',\%form); 291: return OK; 292: } else { 293: my $reply = &Apache::lonnet::reply('tmpdel:'.$form{'logtoken'}, 294: $form{'serverid'}); 295: if ( $reply ne 'ok' ) { 296: &failed($r,'Session could not be opened.',\%form); 297: &Apache::lonnet::logthis("ERROR got a reply of $reply when trying to contact ". $form{'serverid'}." to get login token"); 298: return OK; 299: } 300: } 301: 302: if (!&Apache::lonnet::domain($form{'udom'})) { 303: &failed($r,'The domain you provided is not a valid LON-CAPA domain.',\%form); 304: return OK; 305: } 306: 307: my ($key,$firsturl,$rolestr,$symbstr)=split(/&/,$tmpinfo); 308: if ($rolestr) { 309: $rolestr = &unescape($rolestr); 310: } 311: if ($symbstr) { 312: $symbstr= &unescape($symbstr); 313: } 314: if ($rolestr =~ /^role=/) { 315: (undef,$form{'role'}) = split('=',$rolestr); 316: } 317: if ($symbstr =~ /^symb=/) { 318: (undef,$form{'symb'}) = split('=',$symbstr); 319: } 320: 321: my $keybin=pack("H16",$key); 322: 323: my $cipher; 324: if ($Crypt::DES::VERSION>=2.03) { 325: $cipher=new Crypt::DES $keybin; 326: } 327: else { 328: $cipher=new DES $keybin; 329: } 330: my $upass=''; 331: for (my $i=0;$i<=2;$i++) { 332: my $chunk= 333: $cipher->decrypt(unpack("a8",pack("H16",substr($form{'upass'.$i},0,16)))); 334: 335: $chunk.= 336: $cipher->decrypt(unpack("a8",pack("H16",substr($form{'upass'.$i},16,16)))); 337: 338: $chunk=substr($chunk,1,ord(substr($chunk,0,1))); 339: $upass.=$chunk; 340: } 341: 342: # ---------------------------------------------------------------- Authenticate 343: 344: my %domconfig = &Apache::lonnet::get_dom('configuration',['usercreation'],$form{'udom'}); 345: my ($cancreate,$statustocreate) = 346: &Apache::createaccount::get_creation_controls($form{'udom'},$domconfig{'usercreation'}); 347: my $defaultauth; 348: if (ref($cancreate) eq 'ARRAY') { 349: if (grep(/^login$/,@{$cancreate})) { 350: $defaultauth = 1; 351: } 352: } 353: my $clientcancheckhost = 1; 354: my $authhost=Apache::lonnet::authenticate($form{'uname'},$upass, 355: $form{'udom'},$defaultauth, 356: $clientcancheckhost); 357: 358: # --------------------------------------------------------------------- Failed? 359: 360: if ($authhost eq 'no_host') { 361: &failed($r,'Username and/or password could not be authenticated.', 362: \%form); 363: return OK; 364: } elsif ($authhost eq 'no_account_on_host') { 365: if ($defaultauth) { 366: my $domdesc = &Apache::lonnet::domain($form{'udom'},'description'); 367: unless (&check_can_host($r,\%form,'no_account_on_host',$domdesc)) { 368: return OK; 369: } 370: my $start_page = 371: &Apache::loncommon::start_page('Create a user account in LON-CAPA', 372: '',{'no_inline_link' => 1,}); 373: my $lonhost = $r->dir_config('lonHostID'); 374: my $origmail = $Apache::lonnet::perlvar{'lonSupportEMail'}; 375: my $contacts = 376: &Apache::loncommon::build_recipient_list(undef,'helpdeskmail', 377: $form{'udom'},$origmail); 378: my ($contact_email) = split(',',$contacts); 379: my $output = 380: &Apache::createaccount::username_check($form{'uname'},$form{'udom'}, 381: $domdesc,'',$lonhost, 382: $contact_email,$contact_name, 383: undef,$statustocreate); 384: &Apache::loncommon::content_type($r,'text/html'); 385: $r->send_http_header; 386: &Apache::createaccount::print_header($r,$start_page); 387: $r->print('<h3>'.&mt('Account creation').'</h3>'. 388: &mt('Although your username and password were authenticated, you do not currently have a LON-CAPA account at this institution.').'<br />'. 389: $output.&Apache::loncommon::end_page()); 390: return OK; 391: } else { 392: &failed($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); 393: return OK; 394: } 395: } 396: 397: if (($firsturl eq '') || 398: ($firsturl=~/^\/adm\/(logout|remote)/)) { 399: $firsturl='/adm/roles'; 400: } 401: # --------------------------------- Are we attempting to login as somebody else? 402: if ($form{'suname'}) { 403: # ------------ see if the original user has enough privileges to pull this stunt 404: if (&Apache::lonnet::privileged($form{'uname'},$form{'udom'})) { 405: # ---------------------------------------------------- see if the su-user exists 406: unless (&Apache::lonnet::homeserver($form{'suname'},$form{'udom'}) 407: eq 'no_host') { 408: &Apache::lonnet::logthis(&Apache::lonnet::homeserver($form{'suname'},$form{'udom'})); 409: # ------------------------------ see if the su-user is not too highly privileged 410: unless (&Apache::lonnet::privileged($form{'suname'},$form{'udom'})) { 411: # -------------------------------------------------------- actually switch users 412: &Apache::lonnet::logperm('User '.$form{'uname'}.' at '.$form{'udom'}. 413: ' logging in as '.$form{'suname'}); 414: $form{'uname'}=$form{'suname'}; 415: } else { 416: &Apache::lonnet::logthis('Attempted switch user to privileged user'); 417: } 418: } 419: } else { 420: &Apache::lonnet::logthis('Non-privileged user attempting switch user'); 421: } 422: } 423: 424: my ($is_balancer,$otherserver) = 425: &Apache::lonnet::check_loadbalancing($form{'uname'},$form{'udom'}); 426: 427: if ($is_balancer) { 428: if (!$otherserver) { 429: ($otherserver) = &Apache::lonnet::choose_server($form{'udom'}); 430: } 431: if ($otherserver) { 432: &success($r,$form{'uname'},$form{'udom'},$authhost,'noredirect',undef, 433: \%form); 434: $r->internal_redirect('/adm/switchserver?otherserver='.$otherserver.'&origurl='.$firsturl); 435: } else { 436: $r->print(&noswitch()); 437: } 438: return OK; 439: } else { 440: if (!&check_can_host($r,\%form,$authhost)) { 441: my ($otherserver) = &Apache::lonnet::choose_server($form{'udom'}); 442: if ($otherserver) { 443: &success($r,$form{'uname'},$form{'udom'},$authhost,'noredirect',undef, 444: \%form); 445: $r->internal_redirect('/adm/switchserver?otherserver='.$otherserver.'&origurl='.$firsturl); 446: } else { 447: $r->print(&noswitch()); 448: } 449: return OK; 450: } 451: 452: # ------------------------------------------------------- Do the load balancing 453: 454: # ---------------------------------------------------------- Determine own load 455: my $loadlim = $r->dir_config('lonLoadLim'); 456: my $loadavg; 457: { 458: my $loadfile=Apache::File->new('/proc/loadavg'); 459: $loadavg=<$loadfile>; 460: } 461: $loadavg =~ s/\s.*//g; 462: my $loadpercent=sprintf("%.1f",100*$loadavg/$loadlim); 463: my $userloadpercent=&Apache::lonnet::userload(); 464: 465: # ---------------------------------------------------------- Are we overloaded? 466: if ((($userloadpercent>100.0)||($loadpercent>100.0))) { 467: my $unloaded=Apache::lonnet::spareserver($loadpercent,$userloadpercent,1,$form{'udom'}); 468: if (!$unloaded) { 469: ($unloaded) = &Apache::lonnet::choose_server($form{'udom'}); 470: } 471: if ($unloaded) { 472: &success($r,$form{'uname'},$form{'udom'},$authhost,'noredirect', 473: undef,\%form); 474: $r->internal_redirect('/adm/switchserver?otherserver='.$unloaded.'&origurl='.$firsturl); 475: return OK; 476: } 477: } 478: &success($r,$form{'uname'},$form{'udom'},$authhost,$firsturl,undef, 479: \%form); 480: return OK; 481: } 482: } 483: 484: sub check_can_host { 485: my ($r,$form,$authhost,$domdesc) = @_; 486: return unless (ref($form) eq 'HASH'); 487: my $canhost = 1; 488: my $lonhost = $r->dir_config('lonHostID'); 489: my $udom = $form->{'udom'}; 490: my @intdoms; 491: my $internet_names = &Apache::lonnet::get_internet_names($lonhost); 492: if (ref($internet_names) eq 'ARRAY') { 493: @intdoms = @{$internet_names}; 494: } 495: my $uprimary_id = &Apache::lonnet::domain($udom,'primary'); 496: my $uint_dom = &Apache::lonnet::internet_dom($uprimary_id); 497: unless ($uint_dom ne '' && grep(/^\Q$uint_dom\E$/,@intdoms)) { 498: my $machine_dom = &Apache::lonnet::host_domain($lonhost); 499: my $hostname = &Apache::lonnet::hostname($lonhost); 500: my $serverhomeID = &Apache::lonnet::get_server_homeID($hostname); 501: my $serverhomedom = &Apache::lonnet::host_domain($serverhomeID); 502: my %defdomdefaults = &Apache::lonnet::get_domain_defaults($serverhomedom); 503: my %udomdefaults = &Apache::lonnet::get_domain_defaults($udom); 504: my $loncaparev; 505: if ($authhost eq 'no_account_on_host') { 506: $loncaparev = &Apache::lonnet::get_server_loncaparev($machine_dom); 507: } else { 508: $loncaparev = &Apache::lonnet::get_server_loncaparev($machine_dom,$lonhost); 509: } 510: $canhost = &Apache::lonnet::can_host_session($udom,$lonhost,$loncaparev, 511: $udomdefaults{'remotesessions'}, 512: $defdomdefaults{'hostedsessions'}); 513: } 514: unless ($canhost) { 515: if ($authhost eq 'no_account_on_host') { 516: my $checkloginvia = 1; 517: my ($login_host,$hostname) = 518: &Apache::lonnet::choose_server($udom,$checkloginvia); 519: &Apache::loncommon::content_type($r,'text/html'); 520: $r->send_http_header; 521: if ($login_host ne '') { 522: my $protocol = $Apache::lonnet::protocol{$login_host}; 523: $protocol = 'http' if ($protocol ne 'https'); 524: my $newurl = $protocol.'://'.$hostname.'/adm/createaccount'; 525: $r->print(&Apache::loncommon::start_page('Create a user account in LON-CAPA'). 526: '<h3>'.&mt('Account creation').'</h3>'. 527: &mt('You do not currently have a LON-CAPA account at this institution.').'<br />'. 528: '<p>'.&mt('You will be able to create one by logging into a LON-CAPA server within the [_1] domain.',$domdesc).'</p>'. 529: '<p>'.&mt('[_1]Log in[_2]','<a href="'.$newurl.'">','</a>'). 530: &Apache::loncommon::end_page()); 531: } else { 532: $r->print(&Apache::loncommon::start_page('Access to LON-CAPA unavailable'). 533: '<h3>'.&mt('Account creation unavailable').'</h3>'. 534: &mt('You do not currently have a LON-CAPA account at this institution.').'<br />'. 535: '<p>'.&mt('Currently a LON-CAPA server is not available within the [_1] domain for you to log-in to, to create an account.',$domdesc).'</p>'. 536: &Apache::loncommon::end_page()); 537: } 538: } else { 539: &success($r,$form->{'uname'},$udom,$authhost,'noredirect',undef, 540: $form); 541: my ($otherserver) = &Apache::lonnet::choose_server($udom); 542: $r->internal_redirect('/adm/switchserver?otherserver='.$otherserver); 543: } 544: } 545: return $canhost; 546: } 547: 548: sub noswitch { 549: my $result = &Apache::loncommon::start_page('Access to LON-CAPA unavailable'). 550: '<h3>'.&mt('Session unavailable').'</h3>'. 551: &mt('This LON-CAPA server is unable to host your session.').'<br />'. 552: '<p>'.&mt('Currently no other LON-CAPA server is available to host your session either.').'</p>'. 553: &Apache::loncommon::end_page(); 554: return $result; 555: } 556: 557: 1; 558: __END__ 559: 560: