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/*
* Copyright (C) 2013 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include "CryptoAlgorithmHMAC.h"
#if ENABLE(SUBTLE_CRYPTO)
#include "CryptoAlgorithmHmacKeyParams.h"
#include "CryptoKeyHMAC.h"
#include <wtf/Variant.h>
namespace WebCore {
namespace CryptoAlgorithmHMACInternal {
static const char* const ALG1 = "HS1";
static const char* const ALG224 = "HS224";
static const char* const ALG256 = "HS256";
static const char* const ALG384 = "HS384";
static const char* const ALG512 = "HS512";
}
static inline bool usagesAreInvalidForCryptoAlgorithmHMAC(CryptoKeyUsageBitmap usages)
{
return usages & (CryptoKeyUsageEncrypt | CryptoKeyUsageDecrypt | CryptoKeyUsageDeriveKey | CryptoKeyUsageDeriveBits | CryptoKeyUsageWrapKey | CryptoKeyUsageUnwrapKey);
}
Ref<CryptoAlgorithm> CryptoAlgorithmHMAC::create()
{
return adoptRef(*new CryptoAlgorithmHMAC);
}
CryptoAlgorithmIdentifier CryptoAlgorithmHMAC::identifier() const
{
return s_identifier;
}
void CryptoAlgorithmHMAC::sign(std::unique_ptr<CryptoAlgorithmParameters>&&, Ref<CryptoKey>&& key, Vector<uint8_t>&& data, VectorCallback&& callback, ExceptionCallback&& exceptionCallback, ScriptExecutionContext& context, WorkQueue& workQueue)
{
dispatchOperation(workQueue, context, WTFMove(callback), WTFMove(exceptionCallback),
[key = WTFMove(key), data = WTFMove(data)] {
return platformSign(downcast<CryptoKeyHMAC>(key.get()), data);
});
}
void CryptoAlgorithmHMAC::verify(std::unique_ptr<CryptoAlgorithmParameters>&&, Ref<CryptoKey>&& key, Vector<uint8_t>&& signature, Vector<uint8_t>&& data, BoolCallback&& callback, ExceptionCallback&& exceptionCallback, ScriptExecutionContext& context, WorkQueue& workQueue)
{
dispatchOperation(workQueue, context, WTFMove(callback), WTFMove(exceptionCallback),
[key = WTFMove(key), signature = WTFMove(signature), data = WTFMove(data)] {
return platformVerify(downcast<CryptoKeyHMAC>(key.get()), signature, data);
});
}
void CryptoAlgorithmHMAC::generateKey(const CryptoAlgorithmParameters& parameters, bool extractable, CryptoKeyUsageBitmap usages, KeyOrKeyPairCallback&& callback, ExceptionCallback&& exceptionCallback, ScriptExecutionContext&)
{
const auto& hmacParameters = downcast<CryptoAlgorithmHmacKeyParams>(parameters);
if (usagesAreInvalidForCryptoAlgorithmHMAC(usages)) {
exceptionCallback(SyntaxError);
return;
}
if (hmacParameters.length && !hmacParameters.length.value()) {
exceptionCallback(OperationError);
return;
}
auto result = CryptoKeyHMAC::generate(hmacParameters.length.value_or(0), hmacParameters.hashIdentifier, extractable, usages);
if (!result) {
exceptionCallback(OperationError);
return;
}
callback(WTFMove(result));
}
void CryptoAlgorithmHMAC::importKey(CryptoKeyFormat format, KeyData&& data, const std::unique_ptr<CryptoAlgorithmParameters>&& parameters, bool extractable, CryptoKeyUsageBitmap usages, KeyCallback&& callback, ExceptionCallback&& exceptionCallback)
{
using namespace CryptoAlgorithmHMACInternal;
ASSERT(parameters);
const auto& hmacParameters = downcast<CryptoAlgorithmHmacKeyParams>(*parameters);
if (usagesAreInvalidForCryptoAlgorithmHMAC(usages)) {
exceptionCallback(SyntaxError);
return;
}
RefPtr<CryptoKeyHMAC> result;
switch (format) {
case CryptoKeyFormat::Raw:
result = CryptoKeyHMAC::importRaw(hmacParameters.length.value_or(0), hmacParameters.hashIdentifier, WTFMove(WTF::get<Vector<uint8_t>>(data)), extractable, usages);
break;
case CryptoKeyFormat::Jwk: {
auto checkAlgCallback = [](CryptoAlgorithmIdentifier hash, const String& alg) -> bool {
switch (hash) {
case CryptoAlgorithmIdentifier::SHA_1:
return alg.isNull() || alg == ALG1;
case CryptoAlgorithmIdentifier::SHA_224:
return alg.isNull() || alg == ALG224;
case CryptoAlgorithmIdentifier::SHA_256:
return alg.isNull() || alg == ALG256;
case CryptoAlgorithmIdentifier::SHA_384:
return alg.isNull() || alg == ALG384;
case CryptoAlgorithmIdentifier::SHA_512:
return alg.isNull() || alg == ALG512;
default:
return false;
}
return false;
};
result = CryptoKeyHMAC::importJwk(hmacParameters.length.value_or(0), hmacParameters.hashIdentifier, WTFMove(WTF::get<JsonWebKey>(data)), extractable, usages, WTFMove(checkAlgCallback));
break;
}
default:
exceptionCallback(NotSupportedError);
return;
}
if (!result) {
exceptionCallback(DataError);
return;
}
callback(*result);
}
void CryptoAlgorithmHMAC::exportKey(CryptoKeyFormat format, Ref<CryptoKey>&& key, KeyDataCallback&& callback, ExceptionCallback&& exceptionCallback)
{
using namespace CryptoAlgorithmHMACInternal;
const auto& hmacKey = downcast<CryptoKeyHMAC>(key.get());
if (hmacKey.key().isEmpty()) {
exceptionCallback(OperationError);
return;
}
KeyData result;
switch (format) {
case CryptoKeyFormat::Raw:
result = Vector<uint8_t>(hmacKey.key());
break;
case CryptoKeyFormat::Jwk: {
JsonWebKey jwk = hmacKey.exportJwk();
switch (hmacKey.hashAlgorithmIdentifier()) {
case CryptoAlgorithmIdentifier::SHA_1:
jwk.alg = String(ALG1);
break;
case CryptoAlgorithmIdentifier::SHA_224:
jwk.alg = String(ALG224);
break;
case CryptoAlgorithmIdentifier::SHA_256:
jwk.alg = String(ALG256);
break;
case CryptoAlgorithmIdentifier::SHA_384:
jwk.alg = String(ALG384);
break;
case CryptoAlgorithmIdentifier::SHA_512:
jwk.alg = String(ALG512);
break;
default:
ASSERT_NOT_REACHED();
}
result = WTFMove(jwk);
break;
}
default:
exceptionCallback(NotSupportedError);
return;
}
callback(format, WTFMove(result));
}
ExceptionOr<size_t> CryptoAlgorithmHMAC::getKeyLength(const CryptoAlgorithmParameters& parameters)
{
return CryptoKeyHMAC::getKeyLength(parameters);
}
}
#endif // ENABLE(SUBTLE_CRYPTO)