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/*
* Copyright (C) 2013-2024 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 "CryptoDigest.h"
#include "PALSwift.h"
#include <CommonCrypto/CommonCrypto.h>
#include <optional>
#include <span>
#include <wtf/TZoneMallocInlines.h>
namespace PAL {
struct CryptoDigestContext {
WTF_MAKE_STRUCT_TZONE_ALLOCATED(CryptoDigestContext);
using CCContext = Variant<
#if !defined(CLANG_WEBKIT_BRANCH)
std::unique_ptr<PAL::Digest>,
#endif
std::unique_ptr<CC_SHA1_CTX>,
std::unique_ptr<CC_SHA256_CTX>,
std::unique_ptr<CC_SHA512_CTX>
>;
CryptoDigest::Algorithm algorithm;
CCContext ccContext;
};
WTF_MAKE_STRUCT_TZONE_ALLOCATED_IMPL(CryptoDigestContext);
inline CC_SHA1_CTX* toSHA1Context(CryptoDigestContext* context)
{
ASSERT(context->algorithm == CryptoDigest::Algorithm::SHA_1);
return static_cast<CC_SHA1_CTX*>(std::get<std::unique_ptr<CC_SHA1_CTX>>(context->ccContext).get());
}
inline CC_SHA256_CTX* toSHA256Context(CryptoDigestContext* context)
{
ASSERT(context->algorithm == CryptoDigest::Algorithm::SHA_256);
return static_cast<CC_SHA256_CTX*>(std::get<std::unique_ptr<CC_SHA256_CTX>>(context->ccContext).get());
}
inline CC_SHA512_CTX* toSHA384Context(CryptoDigestContext* context)
{
ASSERT(context->algorithm == CryptoDigest::Algorithm::SHA_384);
return static_cast<CC_SHA512_CTX*>(std::get<std::unique_ptr<CC_SHA512_CTX>>(context->ccContext).get());
}
inline CC_SHA512_CTX* toSHA512Context(CryptoDigestContext* context)
{
ASSERT(context->algorithm == CryptoDigest::Algorithm::SHA_512);
return static_cast<CC_SHA512_CTX*>(std::get<std::unique_ptr<CC_SHA512_CTX>>(context->ccContext).get());
}
CryptoDigest::CryptoDigest()
: m_context(WTF::makeUnique<CryptoDigestContext>())
{
}
CryptoDigest::~CryptoDigest()
{
}
#if !defined(CLANG_WEBKIT_BRANCH)
static CryptoDigestContext::CCContext createCryptoDigest(CryptoDigest::Algorithm algorithm)
{
switch (algorithm) {
case CryptoDigest::Algorithm::SHA_1: {
return WTF::makeUniqueWithoutFastMallocCheck<PAL::Digest>(PAL::Digest::sha1Init());
}
case CryptoDigest::Algorithm::SHA_256: {
return WTF::makeUniqueWithoutFastMallocCheck<PAL::Digest>(PAL::Digest::sha256Init());
}
case CryptoDigest::Algorithm::SHA_384: {
return WTF::makeUniqueWithoutFastMallocCheck<PAL::Digest>(PAL::Digest::sha384Init());
}
case CryptoDigest::Algorithm::SHA_512: {
return WTF::makeUniqueWithoutFastMallocCheck<PAL::Digest>(PAL::Digest::sha512Init());
}
case CryptoDigest::Algorithm::DEPRECATED_SHA_224: {
RELEASE_ASSERT_NOT_REACHED_WITH_MESSAGE("SHA224 is not supported.");
std::unique_ptr<CC_SHA256_CTX> context = WTF::makeUniqueWithoutFastMallocCheck<CC_SHA256_CTX>();
CC_SHA256_Init(context.get());
return context;
}
}
}
#endif
std::unique_ptr<CryptoDigest> CryptoDigest::create(CryptoDigest::Algorithm algorithm)
{
#if !defined(CLANG_WEBKIT_BRANCH)
std::unique_ptr<CryptoDigest> digest = WTF::makeUnique<CryptoDigest>();
ASSERT(digest->m_context);
digest->m_context->algorithm = algorithm;
digest->m_context->ccContext = createCryptoDigest(algorithm);
return digest;
#else
UNUSED_PARAM(algorithm);
RELEASE_ASSERT_NOT_REACHED_WITH_MESSAGE("CLANG_WEBKIT_BRANCH");
#endif
}
IGNORE_CLANG_WARNINGS_BEGIN("missing-noreturn")
void CryptoDigest::addBytes(std::span<const uint8_t> input)
{
#if !defined(CLANG_WEBKIT_BRANCH)
switch (m_context->algorithm) {
case CryptoDigest::Algorithm::SHA_1:
case CryptoDigest::Algorithm::SHA_256:
case CryptoDigest::Algorithm::SHA_384:
case CryptoDigest::Algorithm::SHA_512:
std::get<std::unique_ptr<PAL::Digest>>(m_context->ccContext)->update(input);
return;
case CryptoDigest::Algorithm::DEPRECATED_SHA_224:
RELEASE_ASSERT_NOT_REACHED_WITH_MESSAGE("SHA224 is not supported.");
CC_SHA256_Update(toSHA256Context(m_context.get()), static_cast<const void*>(input.data()), input.size());
return;
}
#else
UNUSED_PARAM(input);
RELEASE_ASSERT_NOT_REACHED_WITH_MESSAGE("CLANG_WEBKIT_BRANCH");
#endif
}
IGNORE_CLANG_WARNINGS_END
Vector<uint8_t> CryptoDigest::computeHash()
{
#if !defined(CLANG_WEBKIT_BRANCH)
Vector<uint8_t> result;
switch (m_context->algorithm) {
case CryptoDigest::Algorithm::SHA_1:
case CryptoDigest::Algorithm::SHA_256:
case CryptoDigest::Algorithm::SHA_384:
case CryptoDigest::Algorithm::SHA_512:
return std::get<std::unique_ptr<PAL::Digest>>(m_context->ccContext)->finalize();
case CryptoDigest::Algorithm::DEPRECATED_SHA_224:
RELEASE_ASSERT_NOT_REACHED_WITH_MESSAGE("SHA224 is not supported.");
break;
}
return result;
#else
RELEASE_ASSERT_NOT_REACHED_WITH_MESSAGE("CLANG_WEBKIT_BRANCH");
#endif
}
} // namespace PAL
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