ExceptionOr<void> CryptoAlgorithmHMAC::platformSign(const CryptoAlgorithmHmacParamsDeprecated& parameters, const CryptoKeyHMAC& key, const CryptoOperationData& data, VectorCallback&& callback, VoidCallback&&)
{
auto algorithm = commonCryptoHMACAlgorithm(parameters.hash);
if (!algorithm)
return Exception { NOT_SUPPORTED_ERR };
callback(calculateSignature(*algorithm, key.key(), data));
return { };
}
void CryptoAlgorithmHMAC::platformSign(const CryptoAlgorithmHmacParams& parameters, const CryptoKeyHMAC& key, const CryptoOperationData& data, VectorCallback&& callback, VoidCallback&&, ExceptionCode& ec)
{
CCHmacAlgorithm algorithm;
if (!getCommonCryptoHMACAlgorithm(parameters.hash, algorithm)) {
ec = NOT_SUPPORTED_ERR;
return;
}
Vector<uint8_t> signature = calculateSignature(algorithm, key.key(), data);
callback(signature);
}
void CryptoAlgorithmHMAC::platformVerify(const CryptoAlgorithmHmacParams& parameters, const CryptoKeyHMAC& key, const CryptoOperationData& expectedSignature, const CryptoOperationData& data, BoolCallback&& callback, VoidCallback&&, ExceptionCode& ec)
{
CCHmacAlgorithm algorithm;
if (!getCommonCryptoHMACAlgorithm(parameters.hash, algorithm)) {
ec = NOT_SUPPORTED_ERR;
return;
}
Vector<uint8_t> signature = calculateSignature(algorithm, key.key(), data);
// Using a constant time comparison to prevent timing attacks.
bool result = signature.size() == expectedSignature.second && !constantTimeMemcmp(signature.data(), expectedSignature.first, signature.size());
callback(result);
}
ExceptionOr<void> CryptoAlgorithmHMAC::platformVerify(const CryptoAlgorithmHmacParamsDeprecated& parameters, const CryptoKeyHMAC& key, const CryptoOperationData& expectedSignature, const CryptoOperationData& data, BoolCallback&& callback, VoidCallback&&)
{
auto algorithm = commonCryptoHMACAlgorithm(parameters.hash);
if (!algorithm)
return Exception { NOT_SUPPORTED_ERR };
auto signature = calculateSignature(*algorithm, key.key(), data);
// Using a constant time comparison to prevent timing attacks.
bool result = signature.size() == expectedSignature.second && !constantTimeMemcmp(signature.data(), expectedSignature.first, signature.size());
callback(result);
return { };
}
