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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/core/packet.h>
extern "C" {
#include <parc/security/parc_CryptoHashType.h>
#include <parc/security/parc_CryptoSuite.h>
#include <parc/security/parc_KeyStore.h>
#include <parc/security/parc_Signer.h>
#include <parc/security/parc_SymmetricKeySigner.h>
}
namespace utils {
using Packet = transport::core::Packet;
/**
* A signer can use a single key (asymmetric or symmetric) to sign a packet.
*/
class Signer {
friend class Identity;
public:
/**
* Create a Signer
*
* @param keyStore A keystore containing a private key or simmetric key to
* use to sign packet with this Signer.
* @param suite CryptoSuite to use to verify the signature
*/
Signer(PARCKeyStore *keyStore, CryptoSuite suite);
/**
* Create a Signer
*
* @param passphrase A string from which the symmetric key will be derived
* @param suite CryptoSuite to use to verify the signature
*/
Signer(const std::string &passphrase, CryptoSuite suite);
Signer(const PARCSigner *signer, CryptoSuite suite);
Signer(const PARCSigner *signer);
~Signer();
/**
* @brief Sign a packet
*
* This method is general and must be used for Public-private key signature,
* HMAC and CRC.
*
* @param packet A pointer to the header of the packet to sign. Mutable
* field in the packet must be set to 0.
* @param key_id Indentifier of the key to use to generate the signature.
*/
void sign(Packet &packet);
size_t getSignatureLength();
PARCKeyStore *getKeyStore();
private:
PARCBufferComposer *composer_ = nullptr;
PARCBuffer *key_buffer_ = nullptr;
PARCSymmetricKeyStore *symmetricKeyStore_ = nullptr;
PARCSigner *signer_ = nullptr;
PARCSignature *signature_ = nullptr;
PARCKeyId *key_id_ = nullptr;
CryptoSuite suite_;
size_t signature_length_;
static uint8_t zeros[200];
};
} // namespace utils
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