<?php
if (file_exists('/etc/alpine-release')) {
	if (version_compare(file_get_contents('/etc/alpine-release'), '3.8.0') < 0) {
		echo "Skipping test; Alpine < 3.8";
		exit(0);
	}
}
else if (file_exists('/etc/debian_version')) {
	if (version_compare(file_get_contents('/etc/debian_version'), '9.0') < 0) {
		echo "Skipping test; Debian < 9.0";
		exit(0);
	}
}
else {
	echo "FAIL: Unknown base image (neither /etc/alpine-release nor /etc/debian_version exists).\n";
	exit(1);
}

if (version_compare(PHP_VERSION, '7.2.0') < 0) {
	echo "Skipping test; PHP < 7.2";
	exit(0);
}

if (!defined('PASSWORD_ARGON2I')) {
	echo "FAIL: Constant PASSWORD_ARGON2I is not defined.\n";
	exit(1);
}

// Test vector generated using:
// var_dump(password_hash('password', PASSWORD_ARGON2I, ['memory_cost' => 1<<3, 'time_cost' => 1, 'threads' => 1]));
if (!password_verify('password', '$argon2i$v=19$m=8,t=1,p=1$RWxaRlZ0d1FTa3RSY1c1OQ$c7a/rJlPgvH9ItPi74UGuh0tdCBhpdDF7b/nA3QweX8')) {
	echo "FAIL: Failed to check test vector.\n";
	exit(1);
}
exit(0);