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414 lines
15 KiB
Perl
414 lines
15 KiB
Perl
#!/usr/bin/env perl
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# IBM(c) 2007 EPL license http://www.eclipse.org/legal/epl-v10.html
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package xCAT::xcatd;
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BEGIN
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{
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$::XCATROOT = $ENV{'XCATROOT'} ? $ENV{'XCATROOT'} : -d '/opt/xcat' ? '/opt/xcat' : '/usr';
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}
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use strict;
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use xCAT::Table;
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use xCAT::MsgUtils;
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use Data::Dumper;
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use xCAT::NodeRange;
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use xCAT::Utils;
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#--------------------------------------------------------------------------------
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=head1 xCAT::XCATD
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=head2 Package Description
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This program module file, is a set of utilities used by xCAT daemon.
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=cut
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#------------------------------------------------------------------------------
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=head3 validate
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Here is where we check if $peername is allowed to do $request in policy tbl.
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$peername, if set signifies client has a cert that the xCAT CA accepted.
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Logs to syslog and auditlog table all user commands, see site.auditskipcmds
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attribute and auditnosyslog attribute.
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Arguments:
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Returns:
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returns 1 if policy engine allows the action, 0 if denied.
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Globals:
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none
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Error:
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none
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Example:
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if(xCAT::XCATd->validate($peername,$peerhost,$req,$peerhostorg,\@deferredmsgargs)) {
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.
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.
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Comments:
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none
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=cut
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#------------------------------------------------------------------------------
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sub validate {
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my $class = shift;
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my $peername = shift;
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my $peerhost = shift;
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my $request = shift;
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my $peerhostorg = shift;
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my $deferredmsgargs = shift;
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# now check the policy table if user can run the command
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my $policytable = xCAT::Table->new('policy');
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unless ($policytable) {
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xCAT::MsgUtils->message("S", "Unable to open policy data, denying");
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return 0;
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}
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my $policies = $policytable->getAllEntries;
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$policytable->close;
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my $rule;
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my $peerstatus = "untrusted";
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# This sorts the policy table rows based on the level of the priority field in the row.
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# note the lower the number in the policy table the higher the priority
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my @sortedpolicies = sort { $a->{priority} <=> $b->{priority} } (@$policies);
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# check to see if peerhost is trusted
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foreach $rule (@sortedpolicies) {
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if (($rule->{name} and $rule->{name} eq $peername) && ($rule->{rule} =~ /trusted/i)) {
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$peerstatus = "Trusted";
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last;
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}
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}
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my %req_noderange_info;
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if (defined $request->{noderange}->[0]) {
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my @tmpn = xCAT::NodeRange::noderange($request->{noderange}->[0]);
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$req_noderange_info{leftnodenum} = @tmpn;
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if($req_noderange_info{leftnodenum}){
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$req_noderange_info{leftnodes} = \@tmpn;
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}
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}
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RULE: foreach $rule (@sortedpolicies) {
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if ($rule->{name} and $rule->{name} ne '*') {
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#TODO: more complex matching (lists, wildcards)
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next unless ($peername and $peername eq $rule->{name});
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}
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if ($rule->{name} and $rule->{name} eq '*') { #a name is required, but can be any name whatsoever....
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next unless ($peername);
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}
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if ($rule->{time} and $rule->{time} ne '*') {
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#TODO: time ranges
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}
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if ($rule->{host} and $rule->{host} ne '*') {
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#TODO: more complex matching (lists, noderanges?, wildcards)
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next unless ($peerhost eq $rule->{host});
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}
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if ($rule->{commands} and $rule->{commands} ne '*') {
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my @commands = split(",", $rule->{commands});
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my $found = 0;
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foreach my $cmd (@commands) {
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if ($request->{command}->[0] eq $cmd) {
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$found = 1;
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last;
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}
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}
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if ($found == 0) { # no command match
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next;
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}
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}
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if ($rule->{parameters} and $rule->{parameters} ne '*') {
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my $parms;
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if ($request->{arg}) {
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$parms = join(' ', @{ $request->{arg} });
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} else {
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$parms = "";
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}
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my $patt = $rule->{parameters};
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unless ($parms =~ /$patt/) {
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next;
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}
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}
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if ($rule->{noderange} and $rule->{noderange} ne '*') {
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unless($req_noderange_info{leftnodenum}){
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next RULE;
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}
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my $allow = 0;
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if ($rule->{rule} =~ /allow/i or $rule->{rule} =~ /accept/i or $rule->{rule} =~ /trusted/i) {
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$allow = 1;
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}
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my %rulenodes;
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foreach (noderange($rule->{noderange})) {
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$rulenodes{$_} = 1;
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}
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my $hitnum = 0;
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my @non_hit_nodes;
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foreach (@{$req_noderange_info{leftnodes}}) {
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if (defined($rulenodes{$_})) {
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++$hitnum;
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}else{
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push @non_hit_nodes, $_;
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}
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}
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if($hitnum == 0){
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next RULE;
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}elsif($hitnum && $hitnum != $req_noderange_info{leftnodenum}){
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if($allow){
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$req_noderange_info{leftnodenum} = @non_hit_nodes;
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$req_noderange_info{leftnodes} = \@non_hit_nodes;
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next RULE;
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}
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}
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}
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# If we are still in, that means this rule is the first match and dictates behavior.
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# We are not going to log getdestiny,getbladecons,getipmicons commands, way
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# too many of them
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#print Dumper($request);
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if ($rule->{rule}) {
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my $logst;
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my $rc;
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my $status;
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if ($rule->{rule} =~ /allow/i or $rule->{rule} =~ /accept/i or $rule->{rule} =~ /trusted/i) {
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$logst = "xCAT: Allowing " . $request->{command}->[0];
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$status = "Allowed";
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$rc = 1;
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} else {
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$logst = "xCAT: Denying " . $request->{command}->[0];
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$status = "Denied";
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$rc = 0;
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}
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if (($request->{command}->[0] ne "getdestiny") && ($request->{command}->[0] ne "getbladecons") && ($request->{command}->[0] ne "getipmicons")) {
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# set username authenticated to run command
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# if from Trusted host, use input username, else set from creds
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if (($request->{username}) && defined($request->{username}->[0])) {
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if ($peerstatus ne "Trusted") { # then set to peername
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$request->{username}->[0] = $peername;
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}
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} else {
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$request->{username}->[0] = $peername;
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}
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if ($request->{noderange} && defined($request->{noderange}->[0]))
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{
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$logst .= " to " . $request->{noderange}->[0];
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} else { # no noderange maybe a nodes
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if ($request->{node} && defined($request->{node}->[0])) {
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my @reqnodes = @{ $request->{node} };
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if (@reqnodes) {
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$logst .= " to ";
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foreach my $node (@reqnodes) {
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$logst .= "$node,";
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}
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chop $logst;
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}
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}
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}
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# add each argument
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my $args = $request->{arg};
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my $arglist;
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foreach my $argument (@$args) {
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$arglist .= " " . $argument;
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}
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my $saveArglist = $arglist;
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# If this is mkvm check for --password or -w
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if ($request->{command}->[0] eq "mkvm") {
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my $first;
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my $restcommand;
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my $passw = index ($saveArglist, '--password');
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if ($passw > -1) {
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$passw = $passw + 11;
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my $first = substr($saveArglist,0,$passw). "******** ";
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my $restcommand = substr($saveArglist,$passw);
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$restcommand =~ s/^\S+\s*//;
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$saveArglist = "$first$restcommand";
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}
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# now check for -w with password
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$passw = index ($saveArglist, '-w');
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if ($passw > -1) {
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$passw = $passw + 3;
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$first = substr($saveArglist,0,$passw). "******** ";
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$restcommand = substr($saveArglist,$passw);
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$restcommand =~ s/^\S+\s*//;
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$saveArglist = "$first$restcommand";
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}
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}
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if ($arglist) { $logst .= $saveArglist; }
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if ($peername) { $logst .= " for " . $request->{username}->[0] }
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if ($peerhost) { $logst .= " from " . $peerhost }
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# read site.auditskipcmds and auditnosyslog attributes,
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# if set skip commands else audit all cmds.
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# is auditnosyslog, then only write to auditlog table and not to syslog
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my @skipcmds = ($::XCATSITEVALS{auditskipcmds});
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my $auditnosyslog = ($::XCATSITEVALS{auditnosyslog});
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my $skipsyslog = 0; # default is to write all commands to auditlog and syslog
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if (defined($auditnosyslog)) {
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$skipsyslog = $auditnosyslog; # take setting from site table, 1 means no syslog
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}
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# if not "ALL" and not a command from site.auditskipcmds
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# and not getcredentials and not getcredentials ,
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# put in syslog and auditlog
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my $skip = 0;
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my $all = "all";
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if (defined($skipcmds[0])) { # if there are values
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if (grep(/$all/i, @skipcmds)) { # skip all
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$skip = 1;
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} else {
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if (grep(/$request->{command}->[0]/, @skipcmds)) { # skip the command
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$skip = 1;
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}
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# if skip clienttype clienttype:value
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my $client = "clienttype:";
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$client .= $request->{clienttype}->[0];
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if (grep(/$client/, @skipcmds)) { #skip the client
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$skip = 1;
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}
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}
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}
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@$deferredmsgargs = (); #should be redundant, but just in case
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if (($request->{command}->[0] ne "getpostscript") && ($request->{command}->[0] ne "getcredentials") && ($skip == 0)) {
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# put in audit Table and syslog unless site.noauditsyslog=1
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my $rsp = {};
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if ($skipsyslog == 0) { # write to syslog and auditlog
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$rsp->{syslogdata}->[0] = $logst; # put in syslog data
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}
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if ($peername) {
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$rsp->{userid}->[0] = $request->{username}->[0];
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}
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if ($peerhost) {
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$rsp->{clientname}->[0] = $peerhost;
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}
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if (defined $request->{clienttype}) {
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$rsp->{clienttype}->[0] = $request->{clienttype}->[0];
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} else {
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if (defined $request->{becomeuser}) {
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$rsp->{clienttype}->[0] = "webui";
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} else {
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$rsp->{clienttype}->[0] = "other";
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}
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}
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$rsp->{command}->[0] = $request->{command}->[0];
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if ($request->{noderange} && defined($request->{noderange}->[0])) {
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$rsp->{noderange}->[0] = $request->{noderange}->[0];
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}
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$rsp->{args}->[0] = $arglist;
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$rsp->{status}->[0] = $status;
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if ($skipsyslog == 0) { # write to syslog and auditlog
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@$deferredmsgargs = ("SA", $rsp);
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} else { # only auditlog
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@$deferredmsgargs = ("A", $rsp);
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}
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} else { # getpostscript or getcredentials, just syslog
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if (($request->{command}->[0] eq "getpostscript")
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|| ($request->{command}->[0] eq "getcredentials")) {
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unless ($::XCATSITEVALS{skipvalidatelog}) { @$deferredmsgargs = ("S", $logst); }
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} else { #other skipped command syslog unless auditnosyslog
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if ($skipsyslog == 0) { # write to syslog
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@$deferredmsgargs = ("S", $logst);
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}
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}
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}
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} # end getbladecons,etc check
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return $rc;
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} else { #Shouldn't be possible....
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xCAT::MsgUtils->message("S", "Impossible line in xcatd reached");
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return 0;
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}
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} # end RULE
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#Reached end of policy table, reject by default.
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if($req_noderange_info{leftnodenum}){
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my $leftnodes = join(",", @{$req_noderange_info{leftnodes}});
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xCAT::MsgUtils->message("S", "Request matched no policy rule: peername=$peername, peerhost=$peerhost $request->{command}->[0] to $leftnodes");
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}else{
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xCAT::MsgUtils->message("S", "Request matched no policy rule: peername=$peername, peerhost=$peerhost " . $request->{command}->[0]);
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}
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return 0;
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}
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my $tokentimeout = 86400; # one day
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# this subroutine search the token table
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# 1. find the existed token entry for the user and reset the expire time
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# 1.1. if not find existed token, create a new one and add it to token table
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# 2. clean up the expired token
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#
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# this subroutine is called after the account has been authorized
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sub gettoken {
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my $class = shift;
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my $req = shift;
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my $user = $req->{gettoken}->[0]->{username}->[0];
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my $tokentb = xCAT::Table->new('token');
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unless ($tokentb) {
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return undef;
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}
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my $tokens = $tokentb->getAllEntries;
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foreach my $token (@{$tokens}) {
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#clean the expired token
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if ($token->{'expire'} < time()) {
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$tokentb->delEntries({ 'tokenid' => $token->{tokenid} });
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}
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}
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# create a new token for this request
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my $uuid = xCAT::Utils->genUUID();
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my $expiretime = time() + $tokentimeout;
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$tokentb->setAttribs({ tokenid => $uuid, username => $user }, { expire => $expiretime });
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$tokentb->close();
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return ($uuid, $expiretime);
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}
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# verify the token has correct entry in token table and expire time is not exceeded.
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sub verifytoken {
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my $class = shift;
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my $req = shift;
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my $tokenid = $req->{tokens}->[0]->{tokenid}->[0];
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my $tokentb = xCAT::Table->new('token');
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unless ($tokentb) {
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return undef;
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}
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my $token = $tokentb->getAttribs({ 'tokenid' => $tokenid }, ('username', 'expire'));
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if (defined($token) && defined($token->{'username'}) && defined($token->{'expire'})) {
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my $expiretime = time() + $tokentimeout;
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if ($token->{'expire'} < time()) {
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$tokentb->delEntries({ 'tokenid' => $token->{tokenid} });
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return undef;
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} else {
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return $token->{'username'};
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}
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} else {
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return undef;
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}
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}
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1;
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