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/**
* Copyright (C) 2018-present MongoDB, Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the Server Side Public License, version 1,
* as published by MongoDB, Inc.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* Server Side Public License for more details.
*
* You should have received a copy of the Server Side Public License
* along with this program. If not, see
* <http://www.mongodb.com/licensing/server-side-public-license>.
*
* As a special exception, the copyright holders give permission to link the
* code of portions of this program with the OpenSSL library under certain
* conditions as described in each individual source file and distribute
* linked combinations including the program with the OpenSSL library. You
* must comply with the Server Side Public License in all respects for
* all of the code used other than as permitted herein. If you modify file(s)
* with this exception, you may extend this exception to your version of the
* file(s), but you are not obligated to do so. If you do not wish to do so,
* delete this exception statement from your version. If you delete this
* exception statement from all source files in the program, then also delete
* it in the license file.
*/
#include "mongo/platform/basic.h"
#include <initializer_list>
#include "mongo/crypto/sha1_block.h"
#include "mongo/crypto/sha256_block.h"
#include "mongo/config.h"
#include "mongo/util/assert_util.h"
namespace mongo {
namespace {
/**
* Class to load singleton instances of each SHA algorithm.
*/
class BCryptHashLoader {
public:
BCryptHashLoader() {
loadAlgo(&_algoSHA1, BCRYPT_SHA1_ALGORITHM, false);
loadAlgo(&_algoSHA256, BCRYPT_SHA256_ALGORITHM, false);
loadAlgo(&_algoSHA1Hmac, BCRYPT_SHA1_ALGORITHM, true);
loadAlgo(&_algoSHA256Hmac, BCRYPT_SHA256_ALGORITHM, true);
}
~BCryptHashLoader() {
invariant(BCryptCloseAlgorithmProvider(_algoSHA256, 0) == STATUS_SUCCESS);
invariant(BCryptCloseAlgorithmProvider(_algoSHA1, 0) == STATUS_SUCCESS);
invariant(BCryptCloseAlgorithmProvider(_algoSHA256Hmac, 0) == STATUS_SUCCESS);
invariant(BCryptCloseAlgorithmProvider(_algoSHA1Hmac, 0) == STATUS_SUCCESS);
}
BCRYPT_ALG_HANDLE getAlgoSHA256() {
return _algoSHA256;
}
BCRYPT_ALG_HANDLE getAlgoSHA1() {
return _algoSHA1;
}
BCRYPT_ALG_HANDLE getAlgoSHA256Hmac() {
return _algoSHA256Hmac;
};
BCRYPT_ALG_HANDLE getAlgoSHA1Hmac() {
return _algoSHA1Hmac;
};
private:
void loadAlgo(BCRYPT_ALG_HANDLE* algo, const wchar_t* name, bool isHmac) {
invariant(
BCryptOpenAlgorithmProvider(
algo, name, MS_PRIMITIVE_PROVIDER, isHmac ? BCRYPT_ALG_HANDLE_HMAC_FLAG : 0) ==
STATUS_SUCCESS);
}
private:
BCRYPT_ALG_HANDLE _algoSHA256;
BCRYPT_ALG_HANDLE _algoSHA1;
BCRYPT_ALG_HANDLE _algoSHA256Hmac;
BCRYPT_ALG_HANDLE _algoSHA1Hmac;
};
static BCryptHashLoader& getBCryptHashLoader() {
static BCryptHashLoader* loader = new BCryptHashLoader();
return *loader;
}
/**
* Computes a SHA hash of 'input'.
*/
template <typename HashType>
HashType computeHashImpl(BCRYPT_ALG_HANDLE algo, std::initializer_list<ConstDataRange> input) {
HashType output;
BCRYPT_HASH_HANDLE hHash;
fassert(50725,
BCryptCreateHash(algo, &hHash, NULL, 0, NULL, 0, 0) == STATUS_SUCCESS &&
std::all_of(begin(input),
end(input),
[&](const auto& i) {
return BCryptHashData(
hHash,
reinterpret_cast<PUCHAR>(const_cast<char*>(i.data())),
i.length(),
0) == STATUS_SUCCESS;
}) &&
BCryptFinishHash(hHash, output.data(), output.size(), 0) == STATUS_SUCCESS &&
BCryptDestroyHash(hHash) == STATUS_SUCCESS);
return output;
}
/**
* Computes a HMAC SHA'd keyed hash of 'input' using the key 'key', writes output into 'output'.
*/
template <typename HashType>
void computeHmacImpl(BCRYPT_ALG_HANDLE algo,
const uint8_t* key,
size_t keyLen,
const uint8_t* input,
size_t inputLen,
HashType* const output) {
invariant(key && input);
BCRYPT_HASH_HANDLE hHash;
fassert(50726,
BCryptCreateHash(algo, &hHash, NULL, 0, const_cast<PUCHAR>(key), keyLen, 0) ==
STATUS_SUCCESS &&
BCryptHashData(hHash, const_cast<PUCHAR>(input), inputLen, 0) == STATUS_SUCCESS &&
BCryptFinishHash(hHash, output->data(), output->size(), 0) == STATUS_SUCCESS &&
BCryptDestroyHash(hHash) == STATUS_SUCCESS);
}
} // namespace
SHA1BlockTraits::HashType SHA1BlockTraits::computeHash(
std::initializer_list<ConstDataRange> input) {
return computeHashImpl<SHA1BlockTraits::HashType>(getBCryptHashLoader().getAlgoSHA1(),
std::move(input));
}
SHA256BlockTraits::HashType SHA256BlockTraits::computeHash(
std::initializer_list<ConstDataRange> input) {
return computeHashImpl<SHA256BlockTraits::HashType>(getBCryptHashLoader().getAlgoSHA256(),
std::move(input));
}
void SHA1BlockTraits::computeHmac(const uint8_t* key,
size_t keyLen,
const uint8_t* input,
size_t inputLen,
HashType* const output) {
return computeHmacImpl<HashType>(
getBCryptHashLoader().getAlgoSHA1Hmac(), key, keyLen, input, inputLen, output);
}
void SHA256BlockTraits::computeHmac(const uint8_t* key,
size_t keyLen,
const uint8_t* input,
size_t inputLen,
HashType* const output) {
return computeHmacImpl<HashType>(
getBCryptHashLoader().getAlgoSHA256Hmac(), key, keyLen, input, inputLen, output);
}
} // namespace mongo
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