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/*
* Copyright (C) 2013-2023 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 <CommonCrypto/CommonCrypto.h>
namespace PAL {
struct CryptoDigestContext {
CryptoDigest::Algorithm algorithm;
void* ccContext;
};
inline CC_SHA1_CTX* toSHA1Context(CryptoDigestContext* context)
{
ASSERT(context->algorithm == CryptoDigest::Algorithm::SHA_1);
return static_cast<CC_SHA1_CTX*>(context->ccContext);
}
inline CC_SHA256_CTX* toSHA224Context(CryptoDigestContext* context)
{
ASSERT(context->algorithm == CryptoDigest::Algorithm::SHA_224);
return static_cast<CC_SHA256_CTX*>(context->ccContext);
}
inline CC_SHA256_CTX* toSHA256Context(CryptoDigestContext* context)
{
ASSERT(context->algorithm == CryptoDigest::Algorithm::SHA_256);
return static_cast<CC_SHA256_CTX*>(context->ccContext);
}
inline CC_SHA512_CTX* toSHA384Context(CryptoDigestContext* context)
{
ASSERT(context->algorithm == CryptoDigest::Algorithm::SHA_384);
return static_cast<CC_SHA512_CTX*>(context->ccContext);
}
inline CC_SHA512_CTX* toSHA512Context(CryptoDigestContext* context)
{
ASSERT(context->algorithm == CryptoDigest::Algorithm::SHA_512);
return static_cast<CC_SHA512_CTX*>(context->ccContext);
}
CryptoDigest::CryptoDigest()
: m_context(new CryptoDigestContext)
{
}
CryptoDigest::~CryptoDigest()
{
switch (m_context->algorithm) {
case CryptoDigest::Algorithm::SHA_1:
delete toSHA1Context(m_context.get());
return;
case CryptoDigest::Algorithm::SHA_224:
delete toSHA224Context(m_context.get());
return;
case CryptoDigest::Algorithm::SHA_256:
delete toSHA256Context(m_context.get());
return;
case CryptoDigest::Algorithm::SHA_384:
delete toSHA384Context(m_context.get());
return;
case CryptoDigest::Algorithm::SHA_512:
delete toSHA512Context(m_context.get());
return;
}
}
std::unique_ptr<CryptoDigest> CryptoDigest::create(CryptoDigest::Algorithm algorithm)
{
std::unique_ptr<CryptoDigest> digest(new CryptoDigest);
digest->m_context->algorithm = algorithm;
switch (algorithm) {
case CryptoDigest::Algorithm::SHA_1: {
CC_SHA1_CTX* context = new CC_SHA1_CTX;
digest->m_context->ccContext = context;
ALLOW_DEPRECATED_DECLARATIONS_BEGIN
CC_SHA1_Init(context);
ALLOW_DEPRECATED_DECLARATIONS_END
return digest;
}
case CryptoDigest::Algorithm::SHA_224: {
CC_SHA256_CTX* context = new CC_SHA256_CTX;
digest->m_context->ccContext = context;
CC_SHA224_Init(context);
return digest;
}
case CryptoDigest::Algorithm::SHA_256: {
CC_SHA256_CTX* context = new CC_SHA256_CTX;
digest->m_context->ccContext = context;
CC_SHA256_Init(context);
return digest;
}
case CryptoDigest::Algorithm::SHA_384: {
CC_SHA512_CTX* context = new CC_SHA512_CTX;
digest->m_context->ccContext = context;
CC_SHA384_Init(context);
return digest;
}
case CryptoDigest::Algorithm::SHA_512: {
CC_SHA512_CTX* context = new CC_SHA512_CTX;
digest->m_context->ccContext = context;
CC_SHA512_Init(context);
return digest;
}
}
}
void CryptoDigest::addBytes(const void* input, size_t length)
{
switch (m_context->algorithm) {
case CryptoDigest::Algorithm::SHA_1:
ALLOW_DEPRECATED_DECLARATIONS_BEGIN
CC_SHA1_Update(toSHA1Context(m_context.get()), input, length);
ALLOW_DEPRECATED_DECLARATIONS_END
return;
case CryptoDigest::Algorithm::SHA_224:
CC_SHA224_Update(toSHA224Context(m_context.get()), input, length);
return;
case CryptoDigest::Algorithm::SHA_256:
CC_SHA256_Update(toSHA256Context(m_context.get()), input, length);
return;
case CryptoDigest::Algorithm::SHA_384:
CC_SHA384_Update(toSHA384Context(m_context.get()), input, length);
return;
case CryptoDigest::Algorithm::SHA_512:
CC_SHA512_Update(toSHA512Context(m_context.get()), input, length);
return;
}
}
Vector<uint8_t> CryptoDigest::computeHash()
{
Vector<uint8_t> result;
switch (m_context->algorithm) {
case CryptoDigest::Algorithm::SHA_1:
result.resize(CC_SHA1_DIGEST_LENGTH);
ALLOW_DEPRECATED_DECLARATIONS_BEGIN
CC_SHA1_Final(result.data(), toSHA1Context(m_context.get()));
ALLOW_DEPRECATED_DECLARATIONS_END
break;
case CryptoDigest::Algorithm::SHA_224:
result.resize(CC_SHA224_DIGEST_LENGTH);
CC_SHA224_Final(result.data(), toSHA224Context(m_context.get()));
break;
case CryptoDigest::Algorithm::SHA_256:
result.resize(CC_SHA256_DIGEST_LENGTH);
CC_SHA256_Final(result.data(), toSHA256Context(m_context.get()));
break;
case CryptoDigest::Algorithm::SHA_384:
result.resize(CC_SHA384_DIGEST_LENGTH);
CC_SHA384_Final(result.data(), toSHA384Context(m_context.get()));
break;
case CryptoDigest::Algorithm::SHA_512:
result.resize(CC_SHA512_DIGEST_LENGTH);
CC_SHA512_Final(result.data(), toSHA512Context(m_context.get()));
break;
}
return result;
}
String CryptoDigest::toHexString()
{
auto hash = computeHash();
char* start = 0;
unsigned hashLength = hash.size();
CString result = CString::newUninitialized(hashLength * 2, start);
char* buffer = start;
for (size_t i = 0; i < hashLength; ++i) {
snprintf(buffer, 3, "%02X", hash.at(i));
buffer += 2;
}
return String::fromUTF8(result);
}
} // namespace PAL
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