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/*
* Copyright (c) 2017-2019 Cisco and/or its affiliates.
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#pragma once
#include <hicn/transport/errors/runtime_exception.h>
#include <hicn/transport/portability/portability.h>
#include <hicn/transport/auth/crypto_hash_type.h>
#include <hicn/transport/utils/array.h>
extern "C" {
#include <parc/security/parc_CryptoHash.h>
};
#include <cstring>
#include <unordered_map>
namespace transport {
namespace auth {
class CryptoHasher;
struct EnumClassHash {
template <typename T>
std::size_t operator()(T t) const {
return static_cast<std::size_t>(t);
}
};
static std::unordered_map<CryptoHashType, std::size_t, EnumClassHash>
hash_size_map = {{CryptoHashType::SHA_256, 32},
{CryptoHashType::CRC32C, 4},
{CryptoHashType::SHA_512, 64}};
class Signer;
class Verifier;
class CryptoHash {
friend class CryptoHasher;
friend class Signer;
friend class Verifier;
public:
CryptoHash() : hash_(nullptr) {}
CryptoHash(const CryptoHash& other) {
if (other.hash_) {
hash_ = parcCryptoHash_Acquire(other.hash_);
}
}
CryptoHash(CryptoHash&& other) {
if (other.hash_) {
hash_ = parcCryptoHash_Acquire(other.hash_);
}
}
template <typename T>
CryptoHash(const T* buffer, std::size_t length, CryptoHashType hash_type) {
hash_ = parcCryptoHash_CreateFromArray(
static_cast<PARCCryptoHashType>(hash_type), buffer, length);
}
~CryptoHash() {
if (hash_) {
parcCryptoHash_Release(&hash_);
}
}
CryptoHash& operator=(const CryptoHash& other) {
if (other.hash_) {
hash_ = parcCryptoHash_Acquire(other.hash_);
}
return *this;
}
template <typename T>
utils::Array<T> getDigest() const {
return utils::Array<T>(
static_cast<T*>(parcBuffer_Overlay(parcCryptoHash_GetDigest(hash_), 0)),
parcBuffer_Remaining(parcCryptoHash_GetDigest(hash_)));
}
CryptoHashType getType() {
return static_cast<CryptoHashType>(parcCryptoHash_GetDigestType(hash_));
}
template <typename T>
static bool compareBinaryDigest(const T* digest1, const T* digest2,
CryptoHashType hash_type) {
if (hash_size_map.find(hash_type) == hash_size_map.end()) {
return false;
}
return !static_cast<bool>(
std::memcmp(digest1, digest2, hash_size_map[hash_type]));
}
TRANSPORT_ALWAYS_INLINE void display() {
parcBuffer_Display(parcCryptoHash_GetDigest(hash_), 2);
}
private:
PARCCryptoHash* hash_;
};
} // namespace auth
} // namespace transport
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