# Set of tests for authentication and pg_hba.conf. The following password
# methods are checked through this test:
# - Plain
# - MD5-encrypted
# - SCRAM-encrypted
# This test cannot run on Windows as Postgres cannot be set up with Unix
# sockets and needs to go through SSPI.

use strict;
use warnings;
use PostgresNode;
use TestLib;
use Test::More tests => 12;

# Delete pg_hba.conf from the given node, add a new entry to it
# and then execute a reload to refresh it.
sub reset_pg_hba
{
	my $node = shift;
	my $hba_method = shift;

	unlink($node->data_dir . '/pg_hba.conf');
	$node->append_conf('pg_hba.conf', "local all all $hba_method");
	$node->reload;
}

# Test access for a single role, useful to wrap all tests into one.
sub test_role
{
	my $node = shift;
	my $role = shift;
	my $method = shift;
	my $expected_res = shift;
	my $status_string = 'failed';

	$status_string = 'success' if ($expected_res eq 0);

	my $res = $node->psql('postgres', 'SELECT 1', extra_params => ['-U', $role]);
	is($res, $expected_res,
	   "authentication $status_string for method $method, role $role");
}

SKIP:
{
	skip "authentication tests cannot run on Windows", 12 if ($windows_os);

	# Initialize master node
	my $node = get_new_node('master');
	$node->init;
	$node->start;

	# Create 3 roles with different password methods for each one. The same
	# password is used for all of them.
	$node->safe_psql('postgres', "SET password_encryption='scram'; CREATE ROLE scram_role LOGIN PASSWORD 'pass';");
	$node->safe_psql('postgres', "SET password_encryption='md5'; CREATE ROLE md5_role LOGIN PASSWORD 'pass';");
	$node->safe_psql('postgres', "SET password_encryption='plain'; CREATE ROLE plain_role LOGIN PASSWORD 'pass';");
	$ENV{"PGPASSWORD"} = 'pass';

	# For "trust" method, all users should be able to connect.
	reset_pg_hba($node, 'trust');
	test_role($node, 'scram_role', 'trust', 0);
	test_role($node, 'md5_role', 'trust', 0);
	test_role($node, 'plain_role', 'trust', 0);

	# For plain "password" method, all users should also be able to connect.
	reset_pg_hba($node, 'password');
	test_role($node, 'scram_role', 'password', 0);
	test_role($node, 'md5_role', 'password', 0);
	test_role($node, 'plain_role', 'password', 0);

	# For "scram" method, user "plain_role" and "scram_role" should be able to
	# connect.
	reset_pg_hba($node, 'scram');
	test_role($node, 'scram_role', 'scram', 0);
	test_role($node, 'md5_role', 'scram', 2);
	test_role($node, 'plain_role', 'scram', 0);

	# For "md5" method, all users should be able to connect (SCRAM
	# authentication will be performed for the user with a scram verifier.)
	reset_pg_hba($node, 'md5');
	test_role($node, 'scram_role', 'md5', 0);
	test_role($node, 'md5_role', 'md5', 0);
	test_role($node, 'plain_role', 'md5', 0);
}
