--- loncom/Lond.pm 2017/05/18 22:13:52 1.10 +++ loncom/Lond.pm 2023/12/28 18:14:08 1.25 @@ -1,6 +1,6 @@ # The LearningOnline Network # -# $Id: Lond.pm,v 1.10 2017/05/18 22:13:52 raeburn Exp $ +# $Id: Lond.pm,v 1.25 2023/12/28 18:14:08 raeburn Exp $ # # Copyright Michigan State University Board of Trustees # @@ -37,8 +37,14 @@ use lib '/home/httpd/lib/perl/'; use LONCAPA; use Apache::lonnet; use GDBM_File; +use MIME::Base64; use Crypt::OpenSSL::X509; - +use Crypt::X509::CRL; +use Crypt::PKCS10; +use Net::OAuth; +use Crypt::CBC; +use Digest::SHA; +use Digest::MD5 qw(md5_hex); sub dump_with_regexp { my ( $tail, $clientversion ) = @_; @@ -59,6 +65,30 @@ sub dump_with_regexp { } } +# +# If dump is for file_permissions.db from a pre-2.12 server and +# $uname:$udom is not a course, determine if value of portaccess +# in effect for $uname:$udom allows portfolio files to be shared. +# If sharing is not allowed, records returned for accesscontrol +# are restricted to those based on ip (i.e., for externalresponse). +# +# Note: for 2.12 or later session-hosting server, determination +# of portaccess value in effect occurs client-side. +# + my ($check_portaccess,$access,$now,$major,$minor,%by_ip); + if ($namespace eq 'file_permissions') { + if ($clientversion =~ /^\'?(\d+)\.(\d+)\.[\w.\-]+\'?/) { + $major = $1; + $minor = $2; + } + unless ((($major > 2) || (($major == 2) && ($minor > 11))) || + &is_course($udom,$uname)) { + $check_portaccess = 1; + $access = &portfolio_is_shareable($udom,$uname); + } + $now = time; + } + my $hashref = &tie_user_hash($udom, $uname, $namespace, &GDBM_READER()) or return "error: ".($!+0)." tie(GDBM) Failed while attempting dump"; @@ -72,7 +102,7 @@ sub dump_with_regexp { # my $skipcheck; my @ids = &Apache::lonnet::current_machine_ids(); - my (%homecourses, $major, $minor, $now); + my %homecourses; # # If dump is for roles.db from a pre-2.10 server, determine the LON-CAPA # version on the server which requested the data. @@ -110,6 +140,26 @@ sub dump_with_regexp { } } } + if ($namespace eq 'file_permissions') { + if ($check_portaccess) { + unless ($access) { + my $unesckey = &unescape($key); + if ($unesckey =~ m{\0((\d+)_\d+_\d+:([a-z]+)_(\d+)_(\d+))$}) { + my ($acl,$timestamp,$scope,$end,$start) = ($1,$2,$3,$4); + if ($scope eq 'ip') { + unless (($start > $now) && + ($end && $end<$now)) { + my ($path) = split(/\0/,$unesckey); + push(@{$by_ip{$path}},{$acl => $timestamp}); + } + } + next; + } elsif ($unesckey =~ m{\0accesscontrol$}) { + next; + } + } + } + } if ($regexp eq '.') { $count++; if (defined($range) && $count >= $end) { last; } @@ -125,7 +175,29 @@ sub dump_with_regexp { } } } - + if (($namespace eq 'file_permissions') && ($check_portaccess) && (!$access)) { + if (keys(%by_ip)) { + my %accesscontrol; + foreach my $path (keys(%by_ip)) { + if (ref($by_ip{$path}) eq 'ARRAY') { + foreach my $item (@{$by_ip{$path}}) { + if (ref($item) eq 'HASH') { + my ($acl,$timestamp) = each(%$item); + my $key = &escape("$path\0$acl"); + my $value = $hashref->{$key}; + $qresult.= "$key=$value&"; + $accesscontrol{"$path\0accesscontrol"}{$acl} = $timestamp; + } + } + } + } + if (keys(%accesscontrol)) { + while (my ($key,$value) = each(%accesscontrol)) { + $qresult.= &escape($key).'='.&Apache::lonnet::freeze_escape($value).'&'; + } + } + } + } &untie_user_hash($hashref) or return "error: ".($!+0)." untie(GDBM) Failed while attempting dump"; # @@ -240,10 +312,10 @@ sub check_homecourses { } } unless (&untie_domain_hash($hashref)) { - &logthis("Failed to untie tied hash for nohist_courseids.db for $domain"); + &Apache::lonnet::logthis("Failed to untie tied hash for nohist_courseids.db for $domain"); } } else { - &logthis("Failed to tie hash for nohist_courseids.db for $domain"); + &Apache::lonnet::logthis("Failed to tie hash for nohist_courseids.db for $domain"); } } foreach my $hashid (keys(%recent)) { @@ -315,9 +387,9 @@ sub get_courseinfo_hash { }; if ($@) { if ($@ eq "timeout\n") { - &logthis("WARNING courseiddump for $cnum:$cdom from $home timedout"); + &Apache::lonnet::logthis("WARNING courseiddump for $cnum:$cdom from $home timedout"); } else { - &logthis("WARNING unexpected error during eval of call for courseiddump from $home"); + &Apache::lonnet::logthis("WARNING unexpected error during eval of call for courseiddump from $home"); } } else { if (ref($info{$cdom.'_'.$cnum}) eq 'HASH') { @@ -328,6 +400,63 @@ sub get_courseinfo_hash { return; } +sub portfolio_is_shareable { + my ($udom,$uname) = @_; + my $check_portaccess = 1; + my ($userportaccess,$inststatus,$access); + my $hashref = &tie_user_hash($udom, $uname, 'environment', &GDBM_READER()); + if (ref($hashref) eq 'HASH') { + my $accesskey = &escape('tools.portaccess'); + $userportaccess = $hashref->{$accesskey}; + $inststatus = $hashref->{'inststatus'}; + &untie_user_hash($hashref); + } + if ($userportaccess ne '') { + $access = $userportaccess; + } else { + my %domdefs = &Apache::lonnet::get_domain_defaults($udom); + if (ref($domdefs{'portaccess'}) eq 'HASH') { + if (($domdefs{'portaccess'}{'_LC_adv'} ne '') && + (&Apache::lonnet::is_advanced_user($udom,$uname))) { + if ($domdefs{'portaccess'}{'_LC_adv'}) { + $access = 1; + } else { + $access = 0; + } + } elsif ($inststatus ne '') { + my ($hasaccess,$hasnoaccess); + foreach my $affiliation (split(/:/,$inststatus)) { + if ($domdefs{'portaccess'}{$affiliation} ne '') { + if ($domdefs{'portaccess'}{$affiliation}) { + $hasaccess = 1; + } else { + $hasnoaccess = 1; + } + } + } + if ($hasaccess || $hasnoaccess) { + if ($hasaccess) { + $access = 1; + } elsif ($hasnoaccess) { + $access = 0; + } + } + } else { + if ($domdefs{'portaccess'}{'default'} ne '') { + if ($domdefs{'portaccess'}{'default'}) { + $access = 1; + } elsif ($domdefs{'portaccess'}{'default'} == 0) { + $access = 0; + } + } + } + } else { + $access = 1; + } + } + return $access; +} + sub dump_course_id_handler { my ($tail) = @_; @@ -783,23 +912,113 @@ sub dump_profile_database { return $qresult; } +sub is_course { + my ($cdom,$cnum) = @_; + + return unless (($cdom =~ /^$LONCAPA::match_domain$/) && + ($cnum =~ /^$LONCAPA::match_courseid$/)); + my $hashid = $cdom.':'.$cnum; + my ($iscourse,$cached) = + &Apache::lonnet::is_cached_new('iscourse',$hashid); + unless (defined($cached)) { + my $hashref = + &tie_domain_hash($cdom, "nohist_courseids", &GDBM_WRCREAT()); + if (ref($hashref) eq 'HASH') { + my $esc_key = &escape($cdom.'_'.$cnum); + if (exists($hashref->{$esc_key})) { + $iscourse = 1; + } else { + $iscourse = 0; + } + &Apache::lonnet::do_cache_new('iscourse',$hashid,$iscourse,3600); + unless (&untie_domain_hash($hashref)) { + &Apache::lonnet::logthis("Failed to untie tied hash for nohist_courseids.db for $cdom"); + } + } else { + &Apache::lonnet::logthis("Failed to tie hash for nohist_courseids.db for $cdom"); + } + } + return $iscourse; +} + sub server_certs { - my ($perlvar) = @_; + my ($perlvar,$lonhost,$hostname) = @_; my %pemfiles = ( key => 'lonnetPrivateKey', host => 'lonnetCertificate', hostname => 'lonnetHostnameCertificate', ca => 'lonnetCertificateAuthority', + crl => 'lonnetCertRevocationList', ); - my (%md5hash,%info); + my (%md5hash,%expected_cn,%expired,%revoked,%wrongcn,%info,$crlfile,$cafile, + %rvkcerts,$numrvk); + %info = ( + key => {}, + ca => {}, + host => {}, + hostname => {}, + crl => {}, + ); + my @ordered = ('crl','key','ca','host','hostname'); if (ref($perlvar) eq 'HASH') { + $expected_cn{'host'} = $Apache::lonnet::serverhomeIDs{$hostname}; + $expected_cn{'hostname'} = 'internal-'.$hostname; my $certsdir = $perlvar->{'lonCertificateDirectory'}; if (-d $certsdir) { - foreach my $key (keys(%pemfiles)) { + $crlfile = $certsdir.'/'.$perlvar->{$pemfiles{'crl'}}; + $cafile = $certsdir.'/'.$perlvar->{$pemfiles{'ca'}}; + foreach my $key (@ordered) { if ($perlvar->{$pemfiles{$key}}) { my $file = $certsdir.'/'.$perlvar->{$pemfiles{$key}}; if (-e $file) { - if ($key eq 'key') { + if ($key eq 'crl') { + if ((-e $crlfile) && (-e $cafile)) { + if (open(PIPE,"openssl crl -in $crlfile -inform pem -CAfile $cafile -noout 2>&1 |")) { + my $crlstatus = ; + close(PIPE); + chomp($crlstatus); + if ($crlstatus =~ /OK/) { + $info{$key}{'status'} = 'ok'; + $info{$key}{'details'} = 'CRL valid for CA'; + } + } + } + if (open(my $fh,'<',$crlfile)) { + my $pem_crl = ''; + while (my $line=<$fh>) { + chomp($line); + next if ($line eq '-----BEGIN X509 CRL-----'); + next if ($line eq '-----END X509 CRL-----'); + $pem_crl .= $line; + } + close($fh); + my $der_crl = MIME::Base64::decode_base64($pem_crl); + if ($der_crl ne '') { + my $decoded = Crypt::X509::CRL->new( crl => $der_crl ); + if ($decoded->error) { + $info{$key}{'status'} = 'error'; + } elsif (ref($decoded)) { + $info{$key}{'start'} = $decoded->this_update; + $info{$key}{'end'} = $decoded->next_update; + $info{$key}{'alg'} = $decoded->SigEncAlg.' '.$decoded->SigHashAlg; + $info{$key}{'cn'} = $decoded->issuer_cn; + $info{$key}{'email'} = $decoded->issuer_email; + $info{$key}{'size'} = $decoded->signature_length; + my $rlref = $decoded->revocation_list; + if (ref($rlref) eq 'HASH') { + foreach my $key (keys(%{$rlref})) { + my $hkey = sprintf("%X",$key); + $rvkcerts{$hkey} = 1; + } + $numrvk = scalar(keys(%{$rlref})); + if ($numrvk) { + $info{$key}{'details'} .= " ($numrvk revoked)"; + } + } + } + } + } + } elsif ($key eq 'key') { if (open(PIPE,"openssl rsa -noout -in $file -check |")) { my $check = ; close(PIPE); @@ -809,6 +1028,7 @@ sub server_certs { if (open(PIPE,"openssl rsa -noout -modulus -in $file | openssl md5 |")) { $md5hash{$key} = ; close(PIPE); + chomp($md5hash{$key}); } } else { if ($key eq 'ca') { @@ -827,6 +1047,7 @@ sub server_certs { if (open(PIPE,"openssl x509 -noout -modulus -in $file | openssl md5 |")) { $md5hash{$key} = ; close(PIPE); + chomp($md5hash{$key}); } } my $x509 = Crypt::OpenSSL::X509->new_from_file($file); @@ -842,6 +1063,49 @@ sub server_certs { $info{$key}{'alg'} = $x509->sig_alg_name(); $info{$key}{'size'} = $x509->bit_length(); $info{$key}{'email'} = $x509->email(); + $info{$key}{'serial'} = uc($x509->serial()); + $info{$key}{'issuerhash'} = $x509->issuer_hash(); + if ($x509->checkend(0)) { + $expired{$key} = 1; + } + if (($key eq 'host') || ($key eq 'hostname')) { + if ($info{$key}{'cn'} ne $expected_cn{$key}) { + $wrongcn{$key} = 1; + } + if (($numrvk) && ($info{$key}{'serial'})) { + if ($rvkcerts{$info{$key}{'serial'}}) { + $revoked{$key} = 1; + } + } + } + } + } + if (($key eq 'host') || ($key eq 'hostname')) { + my $csrfile = $file; + $csrfile =~ s/\.pem$/.csr/; + if (-e $csrfile) { + if (open(PIPE,"openssl req -noout -modulus -in $csrfile |openssl md5 |")) { + my $csrhash = ; + close(PIPE); + chomp($csrhash); + if ((!-e $file) || ($csrhash ne $md5hash{$key}) || ($expired{$key}) || + ($wrongcn{$key}) || ($revoked{$key})) { + Crypt::PKCS10->setAPIversion(1); + my $decoded = Crypt::PKCS10->new( $csrfile,(PEMonly => 1, readFile => 1)); + if (ref($decoded)) { + if ($decoded->commonName() eq $expected_cn{$key}) { + $info{$key.'-csr'}{'cn'} = $decoded->commonName(); + $info{$key.'-csr'}{'alg'} = $decoded->pkAlgorithm(); + $info{$key.'-csr'}{'email'} = $decoded->emailAddress(); + my $params = $decoded->subjectPublicKeyParams(); + if (ref($params) eq 'HASH') { + $info{$key.'-csr'}{'size'} = $params->{keylen}; + } + $md5hash{$key.'-csr'} = $csrhash; + } + } + } + } } } } @@ -851,13 +1115,33 @@ sub server_certs { foreach my $key ('host','hostname') { if ($md5hash{$key}) { if ($md5hash{$key} eq $md5hash{'key'}) { - $info{$key}{'status'} = 'ok'; + if ($revoked{$key}) { + $info{$key}{'status'} = 'revoked'; + } elsif ($expired{$key}) { + $info{$key}{'status'} = 'expired'; + } elsif ($wrongcn{$key}) { + $info{$key}{'status'} = 'wrongcn'; + } elsif ((exists($info{'ca'}{'issuerhash'})) && + ($info{'ca'}{'issuerhash'} ne $info{$key}{'issuerhash'})) { + $info{$key}{'status'} = 'mismatch'; + } else { + $info{$key}{'status'} = 'ok'; + } } elsif ($info{'key'}{'status'} =~ /ok/) { $info{$key}{'status'} = 'otherkey'; } else { $info{$key}{'status'} = 'nokey'; } } + if ($md5hash{$key.'-csr'}) { + if ($md5hash{$key.'-csr'} eq $md5hash{'key'}) { + $info{$key.'-csr'}{'status'} = 'ok'; + } elsif ($info{'key'}{'status'} =~ /ok/) { + $info{$key.'-csr'}{'status'} = 'otherkey'; + } else { + $info{$key.'-csr'}{'status'} = 'nokey'; + } + } } my $result; foreach my $key (keys(%info)) { @@ -867,6 +1151,413 @@ sub server_certs { return $result; } +sub get_dom { + my ($userinput) = @_; + my ($cmd,$udom,$namespace,$what) =split(/:/,$userinput,4); + my $hashref = &tie_domain_hash($udom,$namespace,&GDBM_READER()) or + return "error: ".($!+0)." tie(GDBM) Failed while attempting $cmd"; + my $qresult=''; + if (ref($hashref)) { + chomp($what); + my @queries=split(/\&/,$what); + for (my $i=0;$i<=$#queries;$i++) { + $qresult.="$hashref->{$queries[$i]}&"; + } + $qresult=~s/\&$//; + } + &untie_user_hash($hashref) or + return "error: ".($!+0)." untie(GDBM) Failed while attempting $cmd"; + return $qresult; +} + +sub store_dom { + my ($userinput) = @_; + my ($cmd,$dom,$namespace,$rid,$what) =split(/:/,$userinput); + my $hashref = &tie_domain_hash($dom,$namespace,&GDBM_WRCREAT(),"S","$rid:$what") or + return "error: ".($!+0)." tie(GDBM) Failed while attempting $cmd"; + $hashref->{"version:$rid"}++; + my $version=$hashref->{"version:$rid"}; + my $allkeys=''; + my @pairs=split(/\&/,$what); + foreach my $pair (@pairs) { + my ($key,$value)=split(/=/,$pair); + $allkeys.=$key.':'; + $hashref->{"$version:$rid:$key"}=$value; + } + my $now = time; + $hashref->{"$version:$rid:timestamp"}=$now; + $allkeys.='timestamp'; + $hashref->{"$version:keys:$rid"}=$allkeys; + &untie_user_hash($hashref) or + return "error: ".($!+0)." untie(GDBM) Failed while attempting $cmd"; + return 'ok'; +} + +sub restore_dom { + my ($userinput) = @_; + my ($cmd,$dom,$namespace,$rid) = split(/:/,$userinput); + my $hashref = &tie_domain_hash($dom,$namespace,&GDBM_READER()) or + return "error: ".($!+0)." tie(GDBM) Failed while attempting $cmd"; + my $qresult=''; + if (ref($hashref)) { + chomp($rid); + my $version=$hashref->{"version:$rid"}; + $qresult.="version=$version&"; + my $scope; + for ($scope=1;$scope<=$version;$scope++) { + my $vkeys=$hashref->{"$scope:keys:$rid"}; + my @keys=split(/:/,$vkeys); + my $key; + $qresult.="$scope:keys=$vkeys&"; + foreach $key (@keys) { + $qresult.="$scope:$key=".$hashref->{"$scope:$rid:$key"}."&"; + } + } + $qresult=~s/\&$//; + } + &untie_user_hash($hashref) or + return "error: ".($!+0)." untie(GDBM) Failed while attempting $cmd"; + return $qresult; +} + +sub crslti_itemid { + my ($cdom,$cnum,$url,$method,$params,$loncaparev) = @_; + unless (ref($params) eq 'HASH') { + return; + } + if (($cdom eq '') || ($cnum eq '')) { + return; + } + my ($itemid,$consumer_key,$secret); + + if (exists($params->{'oauth_callback'})) { + $Net::OAuth::PROTOCOL_VERSION = Net::OAuth::PROTOCOL_VERSION_1_0A; + } else { + $Net::OAuth::PROTOCOL_VERSION = Net::OAuth::PROTOCOL_VERSION_1_0; + } + + my $consumer_key = $params->{'oauth_consumer_key'}; + return if ($consumer_key eq ''); + + my (%crslti,%crslti_by_key); + my $hashid=$cdom.'_'.$cnum; + my ($result,$cached)=&Apache::lonnet::is_cached_new('courseltienc',$hashid); + if (defined($cached)) { + if (ref($result) eq 'HASH') { + %crslti = %{$result}; + } + } else { + my $reply = &dump_with_regexp(join(":",($cdom,$cnum,'nohist_ltienc','','')),$loncaparev); + %crslti = %{&Apache::lonnet::unserialize($reply)}; + my $cachetime = 24*60*60; + &Apache::lonnet::do_cache_new('courseltienc',$hashid,\%crslti,$cachetime); + } + + return if (!keys(%crslti)); + + foreach my $id (keys(%crslti)) { + if (ref($crslti{$id}) eq 'HASH') { + my $key = $crslti{$id}{'key'}; + if (($key ne '') && ($crslti{$id}{'secret'} ne '')) { + push(@{$crslti_by_key{$key}},$id); + } + } + } + + return if (!keys(%crslti_by_key)); + + my %courselti = &Apache::lonnet::get_course_lti($cnum,$cdom,'provider'); + + if (ref($crslti_by_key{$consumer_key}) eq 'ARRAY') { + foreach my $id (@{$crslti_by_key{$consumer_key}}) { + my $secret = $crslti{$id}{'secret'}; + if (ref($courselti{$id}) eq 'HASH') { + if ((exists($courselti{$id}{'cipher'})) && + ($courselti{$id}{'cipher'} =~ /^\d+$/)) { + my $keynum = $courselti{$id}{'cipher'}; + my $privkey = &get_dom("getdom:$cdom:private:$keynum:lti:key"); + if ($privkey ne '') { + my $cipher = new Crypt::CBC($privkey); + $secret = $cipher->decrypt_hex($secret); + } + } + } + my $request = Net::OAuth->request('request token')->from_hash($params, + request_url => $url, + request_method => $method, + consumer_secret => $secret,); + if ($request->verify()) { + $itemid = $id; + last; + } + } + } + return $itemid; +} + +sub domlti_itemid { + my ($dom,$context,$url,$method,$params,$loncaparev) = @_; + unless (ref($params) eq 'HASH') { + return; + } + if ($dom eq '') { + return; + } + my ($itemid,$consumer_key,$secret); + + if (exists($params->{'oauth_callback'})) { + $Net::OAuth::PROTOCOL_VERSION = Net::OAuth::PROTOCOL_VERSION_1_0A; + } else { + $Net::OAuth::PROTOCOL_VERSION = Net::OAuth::PROTOCOL_VERSION_1_0; + } + + my $consumer_key = $params->{'oauth_consumer_key'}; + return if ($consumer_key eq ''); + + my ($name,$cachename); + if ($context eq 'linkprot') { + $name = $context; + } else { + $name = 'lti'; + if ($context eq '') { + $context = 'provider'; + } + } + $cachename = $name.'enc'; + my %ltienc; + my ($encresult,$enccached)=&Apache::lonnet::is_cached_new($cachename,$dom); + if (defined($enccached)) { + if (ref($encresult) eq 'HASH') { + %ltienc = %{$encresult}; + } + } else { + my $reply = &get_dom("getdom:$dom:encconfig:$name"); + my $ltiencref = &Apache::lonnet::thaw_unescape($reply); + if (ref($ltiencref) eq 'HASH') { + %ltienc = %{$ltiencref}; + } + my $cachetime = 24*60*60; + &Apache::lonnet::do_cache_new($cachename,$dom,\%ltienc,$cachetime); + } + + return if (!keys(%ltienc)); + + my %lti_by_key; + foreach my $id (keys(%ltienc)) { + if (ref($ltienc{$id}) eq 'HASH') { + my $key = $ltienc{$id}{'key'}; + if (($key ne '') && ($ltienc{$id}{'secret'} ne '')) { + push(@{$lti_by_key{$key}},$id); + } + } + } + return if (!keys(%lti_by_key)); + + my %lti = &Apache::lonnet::get_domain_lti($dom,$context); + + if (ref($lti_by_key{$consumer_key}) eq 'ARRAY') { + foreach my $id (@{$lti_by_key{$consumer_key}}) { + my $secret = $ltienc{$id}{'secret'}; + if (ref($lti{$id}) eq 'HASH') { + if ((exists($lti{$id}{'cipher'})) && + ($lti{$id}{'cipher'} =~ /^\d+$/)) { + my $keynum = $lti{$id}{'cipher'}; + my $privkey = &get_dom("getdom:$dom:private:$keynum:lti:key"); + if ($privkey ne '') { + my $cipher = new Crypt::CBC($privkey); + $secret = $cipher->decrypt_hex($secret); + } + } + } + my $request = Net::OAuth->request('request token')->from_hash($params, + request_url => $url, + request_method => $method, + consumer_secret => $secret,); + if ($request->verify()) { + $itemid = $id; + last; + } + } + } + return $itemid; +} + +sub sign_lti_payload { + my ($cdom,$cnum,$crsdef,$type,$context,$url,$idx,$keynum,$loncaparev,$paramsref,$inforef) = @_; + return unless (ref($paramsref) eq 'HASH'); + my ($sigmethod,$callback,$reqtype,$reqmethod,$respfmt,$bodyhash); + if (ref($inforef) eq 'HASH') { + if (exists($inforef->{'method'})) { + $sigmethod = $inforef->{'method'}; + } + if (exists($inforef->{'cb'})) { + $callback = $inforef->{'cb'}; + } + if (exists($inforef->{'reqtype'})) { + $reqtype = $inforef->{'reqtype'}; + } + if (exists($inforef->{'reqmethod'})) { + $reqmethod = $inforef->{'reqmethod'}; + } + if (exists($inforef->{'body_hash'})) { + $bodyhash = $inforef->{'body_hash'}; + } + if (exists($inforef->{'respfmt'})) { + $respfmt = $inforef->{'respfmt'}; + } + } + my ($key,$secret) = &get_lti_credentials($cdom,$cnum,$crsdef,$type,$idx,$keynum,$loncaparev); + return if (($key eq '') || ($secret eq '')); + if ($sigmethod eq '') { + $sigmethod = 'HMAC-SHA1'; + } + if ($callback eq '') { + $callback = 'about:blank', + } + if ($reqtype eq '') { + $reqtype = 'request token'; + } + if ($reqmethod eq '') { + $reqmethod = 'POST'; + } + srand( time() ^ ($$ + ($$ << 15)) ); # Seed rand. + my $nonce = Digest::SHA::sha1_hex(sprintf("%06x%06x",rand(0xfffff0),rand(0xfffff0))); + my $request; + if (($context eq 'grade') && ($reqtype eq 'consumer') && ($bodyhash ne '')) { + $request = Net::OAuth->request($reqtype)->new( + consumer_key => $key, + consumer_secret => $secret, + request_url => $url, + request_method => $reqmethod, + signature_method => $sigmethod, + timestamp => time(), + nonce => $nonce, + body_hash => $bodyhash, + ); + $request->add_required_message_params('body_hash'); + } else { + $request = Net::OAuth->request($reqtype)->new( + consumer_key => $key, + consumer_secret => $secret, + request_url => $url, + request_method => 'POST', + signature_method => $sigmethod, + timestamp => time, + nonce => $nonce, + callback => $callback, + extra_params => $paramsref, + version => '1.0', + ); + } + $request->sign(); + if ($respfmt eq 'to_post_body') { + return $request->to_post_body(); + } elsif ($respfmt eq 'to_authorization_header') { + return $request->to_authorization_header(); + } else { + return $request->to_hash(); + } +} + +sub get_lti_credentials { + my ($cdom,$cnum,$crsdef,$type,$idx,$keynum,$loncaparev) = @_; + my ($dbname,$name,$cachename,$hashid,$key,$secret,%ltienc); + if ($crsdef) { + $hashid = $cdom.'_'.$cnum; + } else { + $hashid = $cdom; + } + if ($type eq 'tools') { + if ($crsdef) { + $dbname = 'nohist_toolsenc'; + $cachename = 'crsltitoolsenc'; + } else { + $name = 'ltitools'; + $dbname = 'encconfig'; + $cachename = 'ltitoolsenc'; + } + } elsif ($type eq 'linkprot') { + if ($crsdef) { + $dbname = 'nohist_ltienc'; + $cachename = 'courseltienc'; + } else { + $name = 'linkprot'; + $dbname = 'encconfig'; + $cachename = 'linkprotenc'; + } + } elsif ($type eq 'lti') { + $name = 'lti'; + $dbname = 'encconfig'; + $cachename = 'ltienc'; + } + my ($encresult,$enccached)=&Apache::lonnet::is_cached_new($cachename,$hashid); + if (defined($enccached)) { + if (ref($encresult) eq 'HASH') { + %ltienc = %{$encresult}; + } + } else { + if ($crsdef) { + my $reply = &dump_with_regexp(join(":",($cdom,$cnum,$dbname,'','')),$loncaparev); + %ltienc = %{&Apache::lonnet::unserialize($reply)}; + } else { + my $reply = &get_dom("getdom:$cdom:$dbname:$name"); + my $encref = &Apache::lonnet::thaw_unescape($reply); + if (ref($encref) eq 'HASH') { + %ltienc = %{$encref}; + } + } + my $cachetime = 24*60*60; + &Apache::lonnet::do_cache_new($cachename,$hashid,\%ltienc,$cachetime); + } + if (!keys(%ltienc)) { + return (); + } elsif (exists($ltienc{$idx})) { + if (ref($ltienc{$idx}) eq 'HASH') { + if (exists($ltienc{$idx}{'key'})) { + $key = $ltienc{$idx}{'key'}; + } + if (exists($ltienc{$idx}{'secret'})) { + $secret = $ltienc{$idx}{'secret'}; + if ($keynum =~ /^\d+$/) { + my $privhost; + my $privname = 'ltitools'; + if (($type eq 'lti') || ($type eq 'linkprot')) { + $privname = 'lti'; + } + if ($crsdef) { + my $primary = &Apache::lonnet::domain($cdom,'primary'); + my @ids = &Apache::lonnet::current_machine_ids(); + unless (grep(/^\Q$primary\E$/,@ids)) { + $privhost = $primary; + my ($result,$plainsecret) = &decrypt_secret($privhost,$secret,$keynum,$privname); + if ($result eq 'ok') { + $secret = $plainsecret; + } else { + undef($secret); + } + } + } + unless ($privhost) { + my $privkey = &get_dom("getdom:$cdom:private:$keynum:$privname:key"); + if (($privkey ne '') && ($secret ne '')) { + my $cipher = new Crypt::CBC($privkey); + $secret = $cipher->decrypt_hex($secret); + } else { + undef($secret); + } + } + } + } + } + } + return ($key,$secret); +} + +sub decrypt_secret { + my ($privhost,$secret,$keynum,$type) = @_; + return; +} + 1; __END__ @@ -989,7 +1680,18 @@ courseID -- for the course for which the The contents of the inner hash, for that single item in the outer hash are returned (and cached in memcache for 10 minutes). +=item get_dom ( $userinput ) +get_dom() will retrieve domain configuration information from a GDBM file +in /home/httpd/lonUsers/$dom on the primary library server in a domain. +The single argument passed is the string: $cmd:$udom:$namespace:$what +where $cmd is the command historically passed to lond - i.e., getdom +or egetdom, $udom is the domain, $namespace is the name of the GDBM file +(encconfig or configuration), and $what is a string containing names of +items to retrieve from the db file (each item name is escaped and separated +from the next item name with an ampersand). The return value is either: +error: followed by an error message, or a string containing the value (escaped) +for each item, again separated from the next item with an ampersand. =back 500 Internal Server Error

Internal Server Error

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