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/**
* Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
* SPDX-License-Identifier: Apache-2.0.
*/
#include <aws/crt/crypto/Hash.h>
#include <aws/cal/hash.h>
namespace Aws
{
namespace Crt
{
namespace Crypto
{
bool ComputeSHA256(
Allocator *allocator,
const ByteCursor &input,
ByteBuf &output,
size_t truncateTo) noexcept
{
return aws_sha256_compute(allocator, &input, &output, truncateTo) == AWS_OP_SUCCESS;
}
bool ComputeSHA256(const ByteCursor &input, ByteBuf &output, size_t truncateTo) noexcept
{
return aws_sha256_compute(ApiAllocator(), &input, &output, truncateTo) == AWS_OP_SUCCESS;
}
bool ComputeMD5(Allocator *allocator, const ByteCursor &input, ByteBuf &output, size_t truncateTo) noexcept
{
return aws_md5_compute(allocator, &input, &output, truncateTo) == AWS_OP_SUCCESS;
}
bool ComputeMD5(const ByteCursor &input, ByteBuf &output, size_t truncateTo) noexcept
{
return aws_md5_compute(ApiAllocator(), &input, &output, truncateTo) == AWS_OP_SUCCESS;
}
Hash::Hash(aws_hash *hash) noexcept : m_hash(hash), m_good(false), m_lastError(0)
{
if (hash)
{
m_good = true;
}
else
{
m_lastError = aws_last_error();
}
}
Hash::~Hash()
{
if (m_hash)
{
aws_hash_destroy(m_hash);
m_hash = nullptr;
}
}
Hash::Hash(Hash &&toMove) : m_hash(toMove.m_hash), m_good(toMove.m_good), m_lastError(toMove.m_lastError)
{
toMove.m_hash = nullptr;
toMove.m_good = false;
}
Hash &Hash::operator=(Hash &&toMove)
{
if (&toMove != this)
{
*this = Hash(std::move(toMove));
}
return *this;
}
Hash Hash::CreateSHA256(Allocator *allocator) noexcept { return Hash(aws_sha256_new(allocator)); }
Hash Hash::CreateMD5(Allocator *allocator) noexcept { return Hash(aws_md5_new(allocator)); }
bool Hash::Update(const ByteCursor &toHash) noexcept
{
if (*this)
{
if (aws_hash_update(m_hash, &toHash))
{
m_lastError = aws_last_error();
m_good = false;
return false;
}
return true;
}
return false;
}
bool Hash::Digest(ByteBuf &output, size_t truncateTo) noexcept
{
if (*this)
{
m_good = false;
if (aws_hash_finalize(m_hash, &output, truncateTo))
{
m_lastError = aws_last_error();
return false;
}
return true;
}
return false;
}
aws_hash_vtable ByoHash::s_Vtable = {
"aws-crt-cpp-byo-crypto-hash",
"aws-crt-cpp-byo-crypto",
ByoHash::s_Destroy,
ByoHash::s_Update,
ByoHash::s_Finalize,
};
ByoHash::ByoHash(size_t digestSize, Allocator *allocator)
{
AWS_ZERO_STRUCT(m_hashValue);
m_hashValue.vtable = &s_Vtable;
m_hashValue.allocator = allocator;
m_hashValue.impl = reinterpret_cast<void *>(this);
m_hashValue.digest_size = digestSize;
m_hashValue.good = true;
}
ByoHash::~ByoHash() {}
aws_hash *ByoHash::SeatForCInterop(const std::shared_ptr<ByoHash> &selfRef)
{
AWS_FATAL_ASSERT(this == selfRef.get());
m_selfReference = selfRef;
return &m_hashValue;
}
void ByoHash::s_Destroy(struct aws_hash *hash)
{
auto *byoHash = reinterpret_cast<ByoHash *>(hash->impl);
byoHash->m_selfReference = nullptr;
}
int ByoHash::s_Update(struct aws_hash *hash, const struct aws_byte_cursor *buf)
{
auto *byoHash = reinterpret_cast<ByoHash *>(hash->impl);
if (!byoHash->m_hashValue.good)
{
return aws_raise_error(AWS_ERROR_INVALID_STATE);
}
if (!byoHash->UpdateInternal(*buf))
{
byoHash->m_hashValue.good = false;
return AWS_OP_ERR;
}
return AWS_OP_SUCCESS;
}
int ByoHash::s_Finalize(struct aws_hash *hash, struct aws_byte_buf *out)
{
auto *byoHash = reinterpret_cast<ByoHash *>(hash->impl);
if (!byoHash->m_hashValue.good)
{
return aws_raise_error(AWS_ERROR_INVALID_STATE);
}
bool success = byoHash->DigestInternal(*out);
byoHash->m_hashValue.good = false;
return success ? AWS_OP_SUCCESS : AWS_OP_ERR;
}
} // namespace Crypto
} // namespace Crt
} // namespace Aws
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