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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 "CryptoKeyHMAC.h"
#if ENABLE(SUBTLE_CRYPTO)
#include "CryptoAlgorithmDescriptionBuilder.h"
#include "CryptoAlgorithmRegistry.h"
#include "CryptoKeyDataOctetSequence.h"
#include <wtf/text/WTFString.h>
namespace WebCore {
CryptoKeyHMAC::CryptoKeyHMAC(const Vector<uint8_t>& key, CryptoAlgorithmIdentifier hash, bool extractable, CryptoKeyUsage usage)
: CryptoKey(CryptoAlgorithmIdentifier::HMAC, CryptoKeyType::Secret, extractable, usage)
, m_hash(hash)
, m_key(key)
{
}
CryptoKeyHMAC::~CryptoKeyHMAC()
{
}
PassRefPtr<CryptoKeyHMAC> CryptoKeyHMAC::generate(size_t lengthBytes, CryptoAlgorithmIdentifier hash, bool extractable, CryptoKeyUsage usages)
{
if (!lengthBytes) {
switch (hash) {
case CryptoAlgorithmIdentifier::SHA_1:
case CryptoAlgorithmIdentifier::SHA_224:
case CryptoAlgorithmIdentifier::SHA_256:
lengthBytes = 64;
break;
case CryptoAlgorithmIdentifier::SHA_384:
case CryptoAlgorithmIdentifier::SHA_512:
lengthBytes = 128;
break;
default:
return nullptr;
}
}
return adoptRef(new CryptoKeyHMAC(randomData(lengthBytes), hash, extractable, usages));
}
void CryptoKeyHMAC::buildAlgorithmDescription(CryptoAlgorithmDescriptionBuilder& builder) const
{
CryptoKey::buildAlgorithmDescription(builder);
auto hashDescriptionBuilder = builder.createEmptyClone();
hashDescriptionBuilder->add("name", CryptoAlgorithmRegistry::shared().nameForIdentifier(m_hash));
builder.add("hash", *hashDescriptionBuilder);
builder.add("length", m_key.size());
}
std::unique_ptr<CryptoKeyData> CryptoKeyHMAC::exportData() const
{
return CryptoKeyDataOctetSequence::create(m_key);
}
} // namespace WebCore
#endif // ENABLE(SUBTLE_CRYPTO)
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