154 lines
5.6 KiB
C++
154 lines
5.6 KiB
C++
/*
|
|
* 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(WEB_CRYPTO)
|
|
|
|
#include "CryptoAlgorithmHmacKeyParams.h"
|
|
#include "CryptoAlgorithmRegistry.h"
|
|
#include "ExceptionOr.h"
|
|
#include "JsonWebKey.h"
|
|
#include <wtf/text/Base64.h>
|
|
#include <wtf/text/WTFString.h>
|
|
|
|
namespace WebCore {
|
|
|
|
static size_t getKeyLengthFromHash(CryptoAlgorithmIdentifier hash)
|
|
{
|
|
switch (hash) {
|
|
case CryptoAlgorithmIdentifier::SHA_1:
|
|
case CryptoAlgorithmIdentifier::SHA_224:
|
|
case CryptoAlgorithmIdentifier::SHA_256:
|
|
return 512;
|
|
case CryptoAlgorithmIdentifier::SHA_384:
|
|
case CryptoAlgorithmIdentifier::SHA_512:
|
|
return 1024;
|
|
default:
|
|
ASSERT_NOT_REACHED();
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
CryptoKeyHMAC::CryptoKeyHMAC(const Vector<uint8_t>& key, CryptoAlgorithmIdentifier hash, bool extractable, CryptoKeyUsageBitmap usage)
|
|
: CryptoKey(CryptoAlgorithmIdentifier::HMAC, CryptoKeyType::Secret, extractable, usage)
|
|
, m_hash(hash)
|
|
, m_key(key)
|
|
{
|
|
}
|
|
|
|
CryptoKeyHMAC::CryptoKeyHMAC(Vector<uint8_t>&& key, CryptoAlgorithmIdentifier hash, bool extractable, CryptoKeyUsageBitmap usage)
|
|
: CryptoKey(CryptoAlgorithmIdentifier::HMAC, CryptoKeyType::Secret, extractable, usage)
|
|
, m_hash(hash)
|
|
, m_key(WTFMove(key))
|
|
{
|
|
}
|
|
|
|
CryptoKeyHMAC::~CryptoKeyHMAC() = default;
|
|
|
|
RefPtr<CryptoKeyHMAC> CryptoKeyHMAC::generate(size_t lengthBits, CryptoAlgorithmIdentifier hash, bool extractable, CryptoKeyUsageBitmap usages)
|
|
{
|
|
if (!lengthBits) {
|
|
lengthBits = getKeyLengthFromHash(hash);
|
|
if (!lengthBits)
|
|
return nullptr;
|
|
}
|
|
// CommonHMAC only supports key length that is a multiple of 8. Therefore, here we are a little bit different
|
|
// from the spec as of 11 December 2014: https://www.w3.org/TR/WebCryptoAPI/#hmac-operations
|
|
if (lengthBits % 8)
|
|
return nullptr;
|
|
|
|
return adoptRef(new CryptoKeyHMAC(randomData(lengthBits / 8), hash, extractable, usages));
|
|
}
|
|
|
|
RefPtr<CryptoKeyHMAC> CryptoKeyHMAC::importRaw(size_t lengthBits, CryptoAlgorithmIdentifier hash, Vector<uint8_t>&& keyData, bool extractable, CryptoKeyUsageBitmap usages)
|
|
{
|
|
size_t length = keyData.size() * 8;
|
|
if (!length)
|
|
return nullptr;
|
|
// CommonHMAC only supports key length that is a multiple of 8. Therefore, here we are a little bit different
|
|
// from the spec as of 11 December 2014: https://www.w3.org/TR/WebCryptoAPI/#hmac-operations
|
|
if (lengthBits && lengthBits != length)
|
|
return nullptr;
|
|
|
|
return adoptRef(new CryptoKeyHMAC(WTFMove(keyData), hash, extractable, usages));
|
|
}
|
|
|
|
RefPtr<CryptoKeyHMAC> CryptoKeyHMAC::importJwk(size_t lengthBits, CryptoAlgorithmIdentifier hash, JsonWebKey&& keyData, bool extractable, CryptoKeyUsageBitmap usages, CheckAlgCallback&& callback)
|
|
{
|
|
if (keyData.kty != "oct")
|
|
return nullptr;
|
|
if (keyData.k.isNull())
|
|
return nullptr;
|
|
auto octetSequence = base64URLDecode(keyData.k);
|
|
if (!octetSequence)
|
|
return nullptr;
|
|
if (!callback(hash, keyData.alg))
|
|
return nullptr;
|
|
if (usages && !keyData.use.isNull() && keyData.use != "sig")
|
|
return nullptr;
|
|
if (keyData.key_ops && ((keyData.usages & usages) != usages))
|
|
return nullptr;
|
|
if (keyData.ext && !keyData.ext.value() && extractable)
|
|
return nullptr;
|
|
|
|
return CryptoKeyHMAC::importRaw(lengthBits, hash, WTFMove(*octetSequence), extractable, usages);
|
|
}
|
|
|
|
JsonWebKey CryptoKeyHMAC::exportJwk() const
|
|
{
|
|
JsonWebKey result;
|
|
result.kty = "oct";
|
|
result.k = base64URLEncodeToString(m_key);
|
|
result.key_ops = usages();
|
|
result.ext = extractable();
|
|
return result;
|
|
}
|
|
|
|
ExceptionOr<size_t> CryptoKeyHMAC::getKeyLength(const CryptoAlgorithmParameters& parameters)
|
|
{
|
|
auto& aesParameters = downcast<CryptoAlgorithmHmacKeyParams>(parameters);
|
|
|
|
size_t result = aesParameters.length ? *(aesParameters.length) : getKeyLengthFromHash(aesParameters.hashIdentifier);
|
|
if (result)
|
|
return result;
|
|
|
|
return Exception { TypeError };
|
|
}
|
|
|
|
auto CryptoKeyHMAC::algorithm() const -> KeyAlgorithm
|
|
{
|
|
CryptoHmacKeyAlgorithm result;
|
|
result.name = CryptoAlgorithmRegistry::singleton().name(algorithmIdentifier());
|
|
result.hash.name = CryptoAlgorithmRegistry::singleton().name(m_hash);
|
|
result.length = m_key.size() * 8;
|
|
return result;
|
|
}
|
|
|
|
} // namespace WebCore
|
|
|
|
#endif // ENABLE(WEB_CRYPTO)
|