loncom/auth/lonauth.pm - view

File: [LON-CAPA] / loncom / auth / lonauth.pm
Revision 1.113: download - view: text, annotated - select for diffs
Fri Jun 10 01:21:36 2011 UTC (12 years, 11 months ago) by raeburn
Branches: MAIN
CVS tags: HEAD

- Bug 6472.
 -  Replace use of &lonnet::choose_server() with &lonnet::spareserver() as in
    lonnet.pm rev 1.1083 (and later) a check hosting is allowed is included.

1: # The LearningOnline Network 2: # User Authentication Module 3: # 4: # $Id: lonauth.pm,v 1.113 2011/06/10 01:21:36 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::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: 'log' => 'loginproblems.html', 143: ); 144: my $welcome = &mt('Welcome to the Learning[_1]Online[_2] Network with CAPA. Please wait while your session is being set up.','<i>','</i>'); 145: $r->print(<<ENDSUCCESS); 146: $start_page 147: $windowinfo 148: <h1>$lt{'wel'}</h1> 149: $welcome<p> 150: <a href="/adm/$lt{'log'}">$lt{'pro'}</a></p> 151: $continuelink 152: $end_page 153: ENDSUCCESS 154: } 155: 156: # --------------------------------------------------------------- Failed login! 157: 158: sub failed { 159: my ($r,$message,$form) = @_; 160: my $start_page = &Apache::loncommon::start_page('Unsuccessful Login',undef); 161: my $retry = '/adm/login?username='.$form->{'uname'}. 162: '&domain='.$form->{'udom'}; 163: if (exists($form->{role})) { 164: $retry .= '&role='.$form->{role}; 165: } 166: if (exists($form->{symb})) { 167: $retry .= '&symb='.$form->{symb}; 168: } 169: my $end_page = &Apache::loncommon::end_page(); 170: &Apache::loncommon::content_type($r,'text/html'); 171: $r->send_http_header; 172: $r->print( 173: $start_page 174: .'<h1>'.&mt('Sorry ...').'</h1>' 175: .'<p class="LC_warning">'.&mt($message).'</p>' 176: .'<p>'.&mt('Please [_1]log in again[_2].','<a href="'.$retry.'">','</a>') 177: .'</p>' 178: .'<p><a href="/adm/loginproblems.html">'.&mt('Login problems?').'</a></p>' 179: .$end_page 180: ); 181: } 182: 183: # ------------------------------------------------------------------ Rerouting! 184: 185: sub reroute { 186: my ($r) = @_; 187: &Apache::loncommon::content_type($r,'text/html'); 188: $r->send_http_header; 189: my $msg='<h1>'.&mt('Sorry ...').'</h1>' 190: .&mt('Please [_1]log in again[_2].'); 191: &Apache::loncommon::simple_error_page($r,'Rerouting',$msg); 192: } 193: 194: # ---------------------------------------------------------------- Main handler 195: 196: sub handler { 197: my $r = shift; 198: my $form; 199: # Are we re-routing? 200: if (-e '/home/httpd/html/lon-status/reroute.txt') { 201: &reroute($r); 202: return OK; 203: } 204: 205: &Apache::lonlocal::get_language_handle($r); 206: 207: # -------------------------------- Prevent users from attempting to login twice 208: my $handle = &Apache::lonnet::check_for_valid_session($r); 209: if ($handle ne '') { 210: my $lonidsdir=$r->dir_config('lonIDsDir'); 211: if ($handle=~/^publicuser\_/) { 212: # For "public user" - remove it, we apparently really want to login 213: unlink($r->dir_config('lonIDsDir')."/$handle.id"); 214: } else { 215: # Indeed, a valid token is found 216: &Apache::lonnet::transfer_profile_to_env($lonidsdir,$handle); 217: &Apache::loncommon::content_type($r,'text/html'); 218: $r->send_http_header; 219: my $start_page = 220: &Apache::loncommon::start_page('Already logged in'); 221: my $end_page = 222: &Apache::loncommon::end_page(); 223: my $dest = '/adm/roles'; 224: if ($env{'form.firsturl'} ne '') { 225: $dest = $env{'form.firsturl'}; 226: } 227: $r->print( 228: $start_page 229: .'<h1>'.&mt('You are already logged in!').'</h1>' 230: .'<p>'.&mt('Please either [_1]continue the current session[_2] or [_3]log out[_4].' 231: ,'<a href="'.$dest.'">','</a>','<a href="/adm/logout">','</a>') 232: .'</p>' 233: .$end_page 234: ); 235: return OK; 236: } 237: } 238: 239: # ---------------------------------------------------- No valid token, continue 240: 241: 242: my $buffer; 243: if ($r->header_in('Content-length') > 0) { 244: $r->read($buffer,$r->header_in('Content-length'),0); 245: } 246: my %form; 247: foreach my $pair (split(/&/,$buffer)) { 248: my ($name,$value) = split(/=/,$pair); 249: $value =~ tr/+/ /; 250: $value =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg; 251: $form{$name}=$value; 252: } 253: 254: if ((!$form{'uname'}) || (!$form{'upass0'}) || (!$form{'udom'})) { 255: &failed($r,'Username, password and domain need to be specified.', 256: \%form); 257: return OK; 258: } 259: 260: # split user logging in and "su"-user 261: 262: ($form{'uname'},$form{'suname'})=split(/\:/,$form{'uname'}); 263: $form{'uname'} = &LONCAPA::clean_username($form{'uname'}); 264: $form{'suname'}= &LONCAPA::clean_username($form{'suname'}); 265: $form{'udom'} = &LONCAPA::clean_domain( $form{'udom'}); 266: 267: my $role = $r->dir_config('lonRole'); 268: my $domain = $r->dir_config('lonDefDomain'); 269: my $prodir = $r->dir_config('lonUsersDir'); 270: my $contact_name = &mt('LON-CAPA helpdesk'); 271: 272: # ---------------------------------------- Get the information from login token 273: 274: my $tmpinfo=Apache::lonnet::reply('tmpget:'.$form{'logtoken'}, 275: $form{'serverid'}); 276: 277: if (($tmpinfo=~/^error/) || ($tmpinfo eq 'con_lost')) { 278: &failed($r,'Information needed to verify your login information is missing, inaccessible or expired.',\%form); 279: return OK; 280: } else { 281: my $reply = &Apache::lonnet::reply('tmpdel:'.$form{'logtoken'}, 282: $form{'serverid'}); 283: if ( $reply ne 'ok' ) { 284: &failed($r,'Session could not be opened.',\%form); 285: &Apache::lonnet::logthis("ERROR got a reply of $reply when trying to contact ". $form{'serverid'}." to get login token"); 286: return OK; 287: } 288: } 289: 290: if (!&Apache::lonnet::domain($form{'udom'})) { 291: &failed($r,'The domain you provided is not a valid LON-CAPA domain.',\%form); 292: return OK; 293: } 294: 295: my ($key,$firsturl,$rolestr,$symbstr)=split(/&/,$tmpinfo); 296: if ($rolestr) { 297: $rolestr = &unescape($rolestr); 298: } 299: if ($symbstr) { 300: $symbstr= &unescape($symbstr); 301: } 302: if ($rolestr =~ /^role=/) { 303: (undef,$form{'role'}) = split('=',$rolestr); 304: } 305: if ($symbstr =~ /^symb=/) { 306: (undef,$form{'symb'}) = split('=',$symbstr); 307: } 308: 309: my $keybin=pack("H16",$key); 310: 311: my $cipher; 312: if ($Crypt::DES::VERSION>=2.03) { 313: $cipher=new Crypt::DES $keybin; 314: } 315: else { 316: $cipher=new DES $keybin; 317: } 318: my $upass=''; 319: for (my $i=0;$i<=2;$i++) { 320: my $chunk= 321: $cipher->decrypt(unpack("a8",pack("H16",substr($form{'upass'.$i},0,16)))); 322: 323: $chunk.= 324: $cipher->decrypt(unpack("a8",pack("H16",substr($form{'upass'.$i},16,16)))); 325: 326: $chunk=substr($chunk,1,ord(substr($chunk,0,1))); 327: $upass.=$chunk; 328: } 329: 330: # ---------------------------------------------------------------- Authenticate 331: my @cancreate; 332: my %domconfig = &Apache::lonnet::get_dom('configuration',['usercreation'],$form{'udom'}); 333: if (ref($domconfig{'usercreation'}) eq 'HASH') { 334: if (ref($domconfig{'usercreation'}{'cancreate'}) eq 'HASH') { 335: if (ref($domconfig{'usercreation'}{'cancreate'}{'selfcreate'}) eq 'ARRAY') { 336: @cancreate = @{$domconfig{'usercreation'}{'cancreate'}{'selfcreate'}}; 337: } elsif (($domconfig{'usercreation'}{'cancreate'}{'selfcreate'} ne 'none') && 338: ($domconfig{'usercreation'}{'cancreate'}{'selfcreate'} ne '')) { 339: @cancreate = ($domconfig{'usercreation'}{'cancreate'}{'selfcreate'}); 340: } 341: } 342: } 343: my $defaultauth; 344: if (grep(/^login$/,@cancreate)) { 345: $defaultauth = 1; 346: } 347: my $clientcancheckhost = 1; 348: my $authhost=Apache::lonnet::authenticate($form{'uname'},$upass, 349: $form{'udom'},$defaultauth, 350: $clientcancheckhost); 351: 352: # --------------------------------------------------------------------- Failed? 353: 354: if ($authhost eq 'no_host') { 355: &failed($r,'Username and/or password could not be authenticated.', 356: \%form); 357: return OK; 358: } elsif ($authhost eq 'no_account_on_host') { 359: my %domconfig = 360: &Apache::lonnet::get_dom('configuration',['usercreation'],$form{'udom'}); 361: if (grep(/^login$/,@cancreate)) { 362: my $domdesc = &Apache::lonnet::domain($form{'udom'},'description'); 363: unless (&check_can_host($r,\%form,'no_account_on_host',$domdesc)) { 364: return OK; 365: } 366: my $start_page = 367: &Apache::loncommon::start_page('Create a user account in LON-CAPA'); 368: my $lonhost = $r->dir_config('lonHostID'); 369: my $origmail = $Apache::lonnet::perlvar{'lonSupportEMail'}; 370: my $contacts = 371: &Apache::loncommon::build_recipient_list(undef,'helpdeskmail', 372: $form{'udom'},$origmail); 373: my ($contact_email) = split(',',$contacts); 374: my $output = &Apache::createaccount::username_check($form{'uname'}, 375: $form{'udom'},$domdesc,'', 376: $lonhost,$contact_email,$contact_name); 377: &Apache::loncommon::content_type($r,'text/html'); 378: $r->send_http_header; 379: &Apache::createaccount::print_header($r,$start_page); 380: $r->print('<h3>'.&mt('Account creation').'</h3>'. 381: &mt('Although your username and password were authenticated, you do not currently have a LON-CAPA account at this institution.').'<br />'. 382: $output.&Apache::loncommon::end_page()); 383: return OK; 384: } else { 385: &failed($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); 386: return OK; 387: } 388: } 389: 390: if (($firsturl eq '') || 391: ($firsturl=~/^\/adm\/(logout|remote)/)) { 392: $firsturl='/adm/roles'; 393: } 394: # --------------------------------- Are we attempting to login as somebody else? 395: if ($form{'suname'}) { 396: # ------------ see if the original user has enough privileges to pull this stunt 397: if (&Apache::lonnet::privileged($form{'uname'},$form{'udom'})) { 398: # ---------------------------------------------------- see if the su-user exists 399: unless (&Apache::lonnet::homeserver($form{'suname'},$form{'udom'}) 400: eq 'no_host') { 401: &Apache::lonnet::logthis(&Apache::lonnet::homeserver($form{'suname'},$form{'udom'})); 402: # ------------------------------ see if the su-user is not too highly privileged 403: unless (&Apache::lonnet::privileged($form{'suname'},$form{'udom'})) { 404: # -------------------------------------------------------- actually switch users 405: &Apache::lonnet::logperm('User '.$form{'uname'}.' at '.$form{'udom'}. 406: ' logging in as '.$form{'suname'}); 407: $form{'uname'}=$form{'suname'}; 408: } else { 409: &Apache::lonnet::logthis('Attempted switch user to privileged user'); 410: } 411: } 412: } else { 413: &Apache::lonnet::logthis('Non-privileged user attempting switch user'); 414: } 415: } 416: 417: unless (&check_can_host($r,\%form,$authhost)) { 418: return OK; 419: } 420: 421: if ($r->dir_config("lonBalancer") eq 'yes') { 422: &success($r,$form{'uname'},$form{'udom'},$authhost,'noredirect',undef, 423: \%form); 424: my $otherserver = &Apache::lonnet::spareserver(30000,undef,1,$form{'udom'}); 425: $r->internal_redirect('/adm/switchserver?otherserver='.$otherserver.'&origurl='.$firsturl); 426: return OK; 427: } else { 428: # ------------------------------------------------------- Do the load balancing 429: 430: # ---------------------------------------------------------- Determine own load 431: my $loadlim = $r->dir_config('lonLoadLim'); 432: my $loadavg; 433: { 434: my $loadfile=Apache::File->new('/proc/loadavg'); 435: $loadavg=<$loadfile>; 436: } 437: $loadavg =~ s/\s.*//g; 438: my $loadpercent=sprintf("%.1f",100*$loadavg/$loadlim); 439: my $userloadpercent=&Apache::lonnet::userload(); 440: 441: # ---------------------------------------------------------- Are we overloaded? 442: if ((($userloadpercent>100.0)||($loadpercent>100.0))) { 443: my $unloaded=Apache::lonnet::spareserver($loadpercent,$userloadpercent,1,$form{'udom'}); 444: if ($unloaded) { 445: &success($r,$form{'uname'},$form{'udom'},$authhost,'noredirect', 446: undef,\%form); 447: $r->internal_redirect('/adm/switchserver?otherserver='.$unloaded.'&origurl='.$firsturl); 448: return OK; 449: } 450: } 451: &success($r,$form{'uname'},$form{'udom'},$authhost,$firsturl,undef, 452: \%form); 453: return OK; 454: } 455: } 456: 457: sub check_can_host { 458: my ($r,$form,$authhost,$domdesc) = @_; 459: return unless (ref($form) eq 'HASH'); 460: my $canhost = 1; 461: my $lonhost = $r->dir_config('lonHostID'); 462: my $udom = $form->{'udom'}; 463: my @intdoms; 464: my $internet_names = &Apache::lonnet::get_internet_names($lonhost); 465: if (ref($internet_names) eq 'ARRAY') { 466: @intdoms = @{$internet_names}; 467: } 468: my $uprimary_id = &Apache::lonnet::domain($udom,'primary'); 469: my $uint_dom = &Apache::lonnet::internet_dom($uprimary_id); 470: unless ($uint_dom ne '' && grep(/^\Q$uint_dom\E$/,@intdoms)) { 471: my $machine_dom = &Apache::lonnet::host_domain($lonhost); 472: my $hostname = &Apache::lonnet::hostname($lonhost); 473: my $serverhomeID = &Apache::lonnet::get_server_homeID($hostname); 474: my $serverhomedom = &Apache::lonnet::host_domain($serverhomeID); 475: my %defdomdefaults = &Apache::lonnet::get_domain_defaults($serverhomedom); 476: my %udomdefaults = &Apache::lonnet::get_domain_defaults($udom); 477: my $loncaparev; 478: if ($authhost eq 'no_account_on_host') { 479: $loncaparev = &Apache::lonnet::get_server_loncaparev($machine_dom); 480: } else { 481: $loncaparev = &Apache::lonnet::get_server_loncaparev($machine_dom,$lonhost); 482: } 483: $canhost = &Apache::lonnet::can_host_session($udom,$lonhost,$loncaparev, 484: $udomdefaults{'remotesessions'}, 485: $defdomdefaults{'hostedsessions'}); 486: } 487: unless ($canhost) { 488: if ($authhost eq 'no_account_on_host') { 489: my ($login_host,$hostname) = &Apache::lonnet::choose_server($udom); 490: &Apache::loncommon::content_type($r,'text/html'); 491: $r->send_http_header; 492: if ($login_host ne '') { 493: my $protocol = $Apache::lonnet::protocol{$login_host}; 494: $protocol = 'http' if ($protocol ne 'https'); 495: my $newurl = $protocol.'://'.$hostname.'/adm/createaccount'; 496: $r->print(&Apache::loncommon::start_page('Create a user account in LON-CAPA'). 497: '<h3>'.&mt('Account creation').'</h3>'. 498: &mt('You do not currently have a LON-CAPA account at this institution.').'<br />'. 499: '<p>'.&mt('You will be able to create one by logging into a LON-CAPA server within the [_1] domain.',$domdesc).'</p>'. 500: '<p>'.&mt('[_1]Log in[_2]','<a href="'.$newurl.'">','</a>'). 501: &Apache::loncommon::end_page()); 502: } else { 503: $r->print(&Apache::loncommon::start_page('Access to LON-CAPA unavailable'). 504: '<h3>'.&mt('Account creation unavailable').'</h3>'. 505: &mt('You do not currently have a LON-CAPA account at this institution.').'<br />'. 506: '<p>'.&mt('Currently a LON-CAPA server is not available within the [_1] domain for you to log-in to, to create an account.',$domdesc).'</p>'. 507: &Apache::loncommon::end_page()); 508: } 509: } else { 510: &success($r,$form->{'uname'},$udom,$authhost,'noredirect',undef, 511: $form); 512: my ($otherserver) = &Apache::lonnet::choose_server($udom); 513: $r->internal_redirect('/adm/switchserver?otherserver='.$otherserver); 514: } 515: } 516: return $canhost; 517: } 518: 519: 1; 520: __END__ 521: 522: