<?php
class WycheproofTest extends PHPUnit_Framework_TestCase
{
private $dir;
/**
* @before
*/
public function before()
{
ParagonIE_Sodium_Compat::$disableFallbackForUnitTests = true;
$this->dir = dirname(__FILE__) . '/wycheproof/';
}
/**
* @throws Exception
*/
public function testChaCha20Poly1305()
{
if (empty($this->dir)) {
$this->before();
}
$this->mainTestingLoop('chacha20_poly1305_test.json', 'doChaCha20Poly1305Test', false);
}
/**
* @throws Exception
*/
public function testXChaCha20Poly1305()
{
if (empty($this->dir)) {
$this->before();
}
$this->mainTestingLoop('xchacha20_poly1305_test.json', 'doXChaCha20Poly1305Test', false);
}
/**
* @throws Exception
*/
public function testX25519()
{
if (!defined('DO_PEDANTIC_TEST')) {
$this->markTestSkipped('Skipping Wycheproof Tests. Use DO_PEDANTIC_TEST to enable.');
}
if (empty($this->dir)) {
$this->before();
}
$this->mainTestingLoop('x25519_test.json', 'doX25519Test', false);
}
/**
* @param $filename
* @param $method
*
* @throws Exception
*/
public function mainTestingLoop($filename, $method, $progress = false)
{
$total = 0;
$document = $this->getJson($this->dir . $filename);
if ($progress) {
$groupCount = count($document['testGroups']);
$groupId = 1;
}
foreach ($document['testGroups'] as $testGroup) {
if ($progress) {
$testCount = count($testGroup['tests']);
$testId = 1;
}
foreach ($testGroup['tests'] as $test) {
++$total;
if ($progress) {
echo "[Group {$groupId} : Test {$testId}]", PHP_EOL;
}
$message = "{$document['algorithm']} :: #{$test['tcId']} - {$test['comment']}";
try {
$result = call_user_func_array(array($this, $method), array($test));
$expected = ($test['result'] === 'valid');
if ($result !== $expected) {
call_user_func_array(array($this, $method), array($test, true));
}
$this->assertSame($result, $expected, $message);
} catch (Exception $ex) {
if ($test['result'] === 'valid') {
$this->fail("{$message} (" . $ex->getMessage() . ")");
}
}
if ($progress) {
++$groupId;
}
}
if ($progress) {
++$groupId;
}
}
}
/**
* @param array $test
* @return bool
*/
public function doChaCha20Poly1305Test(array $test, $verbose = false)
{
$key = ParagonIE_Sodium_Compat::hex2bin($test['key']);
$iv = ParagonIE_Sodium_Compat::hex2bin($test['iv']);
$aad = ParagonIE_Sodium_Compat::hex2bin($test['aad']);
$msg = ParagonIE_Sodium_Compat::hex2bin($test['msg']);
$ct = ParagonIE_Sodium_Compat::hex2bin($test['ct']);
$tag = ParagonIE_Sodium_Compat::hex2bin($test['tag']);
$encrypted = ParagonIE_Sodium_Compat::crypto_aead_chacha20poly1305_ietf_encrypt(
$msg,
$aad,
$iv,
$key
);
if ($verbose && !ParagonIE_Sodium_Core_Util::hashEquals($ct . $tag, $encrypted)) {
echo 'Difference in Wycheproof test vectors:', PHP_EOL;
echo '- ', ParagonIE_Sodium_Core_Util::bin2hex($ct . $tag), PHP_EOL;
echo '+ ', ParagonIE_Sodium_Core_Util::bin2hex($encrypted), PHP_EOL;
}
return ParagonIE_Sodium_Core_Util::hashEquals($ct . $tag, $encrypted);
}
/**
* @param array $test
* @return bool
*/
public function doXChaCha20Poly1305Test(array $test, $verbose = false)
{
$key = ParagonIE_Sodium_Compat::hex2bin($test['key']);
$iv = ParagonIE_Sodium_Compat::hex2bin($test['iv']);
$aad = ParagonIE_Sodium_Compat::hex2bin($test['aad']);
$msg = ParagonIE_Sodium_Compat::hex2bin($test['msg']);
$ct = ParagonIE_Sodium_Compat::hex2bin($test['ct']);
$tag = ParagonIE_Sodium_Compat::hex2bin($test['tag']);
$encrypted = ParagonIE_Sodium_Compat::crypto_aead_xchacha20poly1305_ietf_encrypt(
$msg,
$aad,
$iv,
$key
);
if ($verbose && !ParagonIE_Sodium_Core_Util::hashEquals($ct . $tag, $encrypted)) {
echo 'Difference in Wycheproof test vectors:', PHP_EOL;
echo '- ', ParagonIE_Sodium_Core_Util::bin2hex($ct . $tag), PHP_EOL;
echo '+ ', ParagonIE_Sodium_Core_Util::bin2hex($encrypted), PHP_EOL;
}
return ParagonIE_Sodium_Core_Util::hashEquals($ct . $tag, $encrypted);
}
/**
* @param array $test
* @return bool
*/
public function doX25519Test(array $test, $verbose = false)
{
$private = ParagonIE_Sodium_Compat::hex2bin($test['private']);
$public = ParagonIE_Sodium_Compat::hex2bin($test['public']);
$shared = ParagonIE_Sodium_Compat::hex2bin($test['shared']);
$scalarmult = ParagonIE_Sodium_Compat::crypto_scalarmult($private, $public);
if ($verbose &&!ParagonIE_Sodium_Core_Util::hashEquals($shared, $scalarmult)) {
echo 'Difference in Wycheproof test vectors:', PHP_EOL;
echo '- ', ParagonIE_Sodium_Core_Util::bin2hex($shared), PHP_EOL;
echo '+ ', ParagonIE_Sodium_Core_Util::bin2hex($scalarmult), PHP_EOL;
}
return ParagonIE_Sodium_Core_Util::hashEquals($shared, $scalarmult);
}
/**
* @param string $file
*
* @return mixed
* @throws Exception
*/
public function getJson($file = '')
{
if (!is_readable($file)) {
throw new Exception('Could not read file');
}
$contents = file_get_contents($file);
if (!is_string($contents)) {
throw new Exception('Could not read file');
}
$decoded = json_decode($contents, true);
if (!is_array($decoded)) {
throw new Exception('Error decoding JSON blob');
}
return $decoded;
}
}
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