--- /dev/null
+use strict;
+use warnings;
+use TestLib;
+use PostgresNode;
+use Test::More;
+
+if ($ENV{with_gssapi} eq 'yes')
+{
+ plan tests => 4;
+}
+else
+{
+ plan skip_all => 'GSSAPI/Kerberos not supported by this build';
+}
+
+my ($krb5_bin_dir, $krb5_sbin_dir);
+
+if ($^O eq 'darwin')
+{
+ $krb5_bin_dir = '/usr/local/opt/krb5/bin';
+ $krb5_sbin_dir = '/usr/local/opt/krb5/sbin';
+}
+elsif ($^O eq 'freebsd')
+{
+ $krb5_bin_dir = '/usr/local/bin';
+ $krb5_sbin_dir = '/usr/local/sbin';
+}
+elsif ($^O eq 'linux')
+{
+ $krb5_sbin_dir = '/usr/sbin';
+}
+
+my $krb5_config = 'krb5-config';
+my $kinit = 'kinit';
+my $kdb5_util = 'kdb5_util';
+my $kadmin_local = 'kadmin.local';
+my $krb5kdc = 'krb5kdc';
+
+if ($krb5_bin_dir && -d $krb5_bin_dir)
+{
+ $krb5_config = $krb5_bin_dir . '/' . $krb5_config;
+ $kinit = $krb5_bin_dir . '/' . $kinit;
+}
+if ($krb5_sbin_dir && -d $krb5_sbin_dir)
+{
+ $kdb5_util = $krb5_sbin_dir . '/' . $kdb5_util;
+ $kadmin_local = $krb5_sbin_dir . '/' . $kadmin_local;
+ $krb5kdc = $krb5_sbin_dir . '/' . $krb5kdc;
+}
+
+my $realm = 'EXAMPLE.COM';
+
+my $krb5_conf = "${TestLib::tmp_check}/krb5.conf";
+my $kdc_conf = "${TestLib::tmp_check}/kdc.conf";
+my $krb5_log = "${TestLib::tmp_check}/krb5libs.log";
+my $kdc_log = "${TestLib::tmp_check}/krb5kdc.log";
+my $kdc_port = int(rand() * 16384) + 49152;
+my $kdc_datadir = "${TestLib::tmp_check}/krb5kdc";
+my $kdc_pidfile = "${TestLib::tmp_check}/krb5kdc.pid";
+my $keytab = "${TestLib::tmp_check}/krb5.keytab";
+
+note "setting up Kerberos";
+
+my ($stdout, $krb5_version);
+run_log [ $krb5_config, '--version' ], '>', \$stdout or BAIL_OUT("could not execute krb5-config");
+BAIL_OUT("Heimdal is not supported") if $stdout =~ m/heimdal/;
+$stdout =~ m/Kerberos 5 release ([0-9]+\.[0-9]+)/ or BAIL_OUT("could not get Kerberos version");
+$krb5_version = $1;
+
+append_to_file($krb5_conf,
+qq![logging]
+default = FILE:$krb5_log
+kdc = FILE:$kdc_log
+
+[libdefaults]
+default_realm = $realm
+
+[realms]
+$realm = {
+ kdc = localhost:$kdc_port
+}!);
+
+append_to_file($kdc_conf,
+qq![kdcdefaults]
+!);
+# For new-enough versions of krb5, use the _listen settings rather
+# than the _ports settings so that we can bind to localhost only.
+if ($krb5_version >= 1.15)
+{
+ append_to_file($kdc_conf,
+qq!kdc_listen = localhost:$kdc_port
+kdc_tcp_listen = localhost:$kdc_port
+!);
+}
+else
+{
+ append_to_file($kdc_conf,
+qq!kdc_ports = $kdc_port
+kdc_tcp_ports = $kdc_port
+!);
+}
+append_to_file($kdc_conf,
+qq!
+[realms]
+$realm = {
+ database_name = $kdc_datadir/principal
+ admin_keytab = FILE:$kdc_datadir/kadm5.keytab
+ acl_file = $kdc_datadir/kadm5.acl
+ key_stash_file = $kdc_datadir/_k5.$realm
+}!);
+
+mkdir $kdc_datadir or die;
+
+$ENV{'KRB5_CONFIG'} = $krb5_conf;
+$ENV{'KRB5_KDC_PROFILE'} = $kdc_conf;
+
+my $service_principal = "$ENV{with_krb_srvnam}/localhost";
+
+system_or_bail $kdb5_util, 'create', '-s', '-P', 'secret0';
+
+my $test1_password = 'secret1';
+system_or_bail $kadmin_local, '-q', "addprinc -pw $test1_password test1";
+
+system_or_bail $kadmin_local, '-q', "addprinc -randkey $service_principal";
+system_or_bail $kadmin_local, '-q', "ktadd -k $keytab $service_principal";
+
+system_or_bail $krb5kdc, '-P', $kdc_pidfile;
+
+END
+{
+ kill 'INT', `cat $kdc_pidfile` if -f $kdc_pidfile;
+}
+
+note "setting up PostgreSQL instance";
+
+my $node = get_new_node('node');
+$node->init;
+$node->append_conf('postgresql.conf', "listen_addresses = 'localhost'");
+$node->append_conf('postgresql.conf', "krb_server_keyfile = '$keytab'");
+$node->start;
+
+$node->safe_psql('postgres', 'CREATE USER test1;');
+
+note "running tests";
+
+sub test_access
+{
+ my ($node, $role, $expected_res, $test_name) = @_;
+
+ # need to connect over TCP/IP for Kerberos
+ my $res = $node->psql('postgres', 'SELECT 1',
+ extra_params => [ '-d', $node->connstr('postgres').' host=localhost',
+ '-U', $role ]);
+ is($res, $expected_res, $test_name);
+}
+
+unlink($node->data_dir . '/pg_hba.conf');
+$node->append_conf('pg_hba.conf', qq{host all all localhost gss map=mymap});
+$node->restart;
+
+test_access($node, 'test1', 2, 'fails without ticket');
+
+run_log [ $kinit, 'test1' ], \$test1_password or BAIL_OUT($?);
+
+test_access($node, 'test1', 2, 'fails without mapping');
+
+$node->append_conf('pg_ident.conf', qq{mymap /^(.*)\@$realm\$ \\1});
+$node->restart;
+
+test_access($node, 'test1', 0, 'succeeds with mapping');
+
+truncate($node->data_dir . '/pg_ident.conf', 0);
+unlink($node->data_dir . '/pg_hba.conf');
+$node->append_conf('pg_hba.conf', qq{host all all localhost gss include_realm=0});
+$node->restart;
+
+test_access($node, 'test1', 0, 'succeeds with include_realm=0');