}
printf("\n");
printf("diff:\n");
for ($i = 0; $i < count($a); $i++) {
if ($a[$i] ^ $b[$i]) {
printf("%02x,", $a[$i] ^ $b[$i]);
} else {
printf(" ,");
}
}
printf("\n\n");
}
$key = FieldElement::fromHex($testVectors[0]);
$input = FieldElement::fromHex($testVectors[1]);
$nonce = FieldElement::fromHex($testVectors[2]);
$ad = FieldElement::fromHex($testVectors[3]);
$expected = FieldElement::fromHex($testVectors[4]);
$ciphertext = Salt::encrypt($input, $ad, $nonce, $key);
if (!Salt::equal($expected, $ciphertext)) {
echo "encryption error:\n";
printDiff($expected, $ciphertext);
} else {
echo "encryption OK\n";
}
$plaintext = Salt::decrypt($ciphertext, $ad, $nonce, $key);
if (!Salt::equal($input, $plaintext)) {
echo "decryption error:\n";
printDiff($input, $plaintext);
} else {
echo "decryption OK\n";
}
