/* * Copyright (C) 2017 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 "CryptoAlgorithmECDH.h" #if ENABLE(SUBTLE_CRYPTO) #include "CommonCryptoUtilities.h" #include "CryptoKeyEC.h" #include "ScriptExecutionContext.h" namespace WebCore { void CryptoAlgorithmECDH::platformDeriveBits(Ref<CryptoKey>&& baseKey, Ref<CryptoKey>&& publicKey, size_t length, Callback&& callback, ScriptExecutionContext& context, WorkQueue& workQueue) { context.ref(); workQueue.dispatch([baseKey = WTFMove(baseKey), publicKey = WTFMove(publicKey), length, callback = WTFMove(callback), &context]() mutable { auto& ecBaseKey = downcast<CryptoKeyEC>(baseKey.get()); auto& ecPublicKey = downcast<CryptoKeyEC>(publicKey.get()); std::optional<Vector<uint8_t>> result = std::nullopt; Vector<uint8_t> derivedKey(ecBaseKey.keySizeInBits() / 8); // Per https://tools.ietf.org/html/rfc6090#section-4. size_t size = derivedKey.size(); if (!CCECCryptorComputeSharedSecret(ecBaseKey.platformKey(), ecPublicKey.platformKey(), derivedKey.data(), &size)) result = WTFMove(derivedKey); context.postTask([result = WTFMove(result), length, callback = WTFMove(callback)](ScriptExecutionContext& context) mutable { callback(WTFMove(result), length); context.deref(); }); }); } } #endif // ENABLE(SUBTLE_CRYPTO)