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/**
* Copyright (C) 2017 MongoDB Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License, version 3,
* as published by the Free Software Foundation.
*
* 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
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* 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 GNU Affero General 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 "mongo/crypto/sha1_block.h"
#include "mongo/crypto/sha256_block.h"
#include "mongo/config.h"
#include "mongo/util/assert_util.h"
#ifdef MONGO_CONFIG_SSL
#error This file should not be included if compiling with SSL support
#endif
#include "tomcrypt.h"
namespace mongo {
namespace {
/**
* Computes a SHA hash of 'input'.
*/
template <typename HashType,
int (*Init)(hash_state*),
int (*Process)(hash_state*, const unsigned char*, unsigned long),
int (*Done)(hash_state*, unsigned char*)>
HashType computeHashImpl(std::initializer_list<ConstDataRange> input) {
HashType output;
hash_state hashState;
fassert(40381,
Init(&hashState) == CRYPT_OK &&
std::all_of(begin(input),
end(input),
[&](const auto& i) {
return Process(&hashState,
reinterpret_cast<const unsigned char*>(i.data()),
i.length()) == CRYPT_OK;
}) &&
Done(&hashState, output.data()) == CRYPT_OK);
return output;
}
/*
* Computes a HMAC SHA'd keyed hash of 'input' using the key 'key', writes output into 'output'.
*/
template <typename HashType>
void computeHmacImpl(const ltc_hash_descriptor* desc,
const uint8_t* key,
size_t keyLen,
const uint8_t* input,
size_t inputLen,
HashType* const output) {
invariant(key && input);
static const struct Magic {
Magic(const ltc_hash_descriptor* desc) {
register_hash(desc);
hashId = find_hash(desc->name);
}
int hashId;
} magic(desc);
unsigned long shaHashLen = sizeof(HashType);
fassert(40382,
hmac_memory(magic.hashId, key, keyLen, input, inputLen, output->data(), &shaHashLen) ==
CRYPT_OK);
}
} // namespace
SHA1BlockTraits::HashType SHA1BlockTraits::computeHash(
std::initializer_list<ConstDataRange> input) {
return computeHashImpl<SHA1BlockTraits::HashType, sha1_init, sha1_process, sha1_done>(input);
}
SHA256BlockTraits::HashType SHA256BlockTraits::computeHash(
std::initializer_list<ConstDataRange> input) {
return computeHashImpl<SHA256BlockTraits::HashType, sha256_init, sha256_process, sha256_done>(
input);
}
void SHA1BlockTraits::computeHmac(const uint8_t* key,
size_t keyLen,
const uint8_t* input,
size_t inputLen,
HashType* const output) {
return computeHmacImpl<HashType>(&sha1_desc, 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>(&sha256_desc, key, keyLen, input, inputLen, output);
}
} // namespace mongo
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