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/*
* Copyright (c) 2017-2022 Ribose Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef CRYPTO_HASH_H_
#define CRYPTO_HASH_H_
#include <repgp/repgp_def.h>
#include "types.h"
#include "config.h"
#include <memory>
#include <vector>
#include <array>
/**
* Output size (in bytes) of biggest supported hash algo
*/
#define PGP_MAX_HASH_SIZE (64)
namespace rnp {
class Hash {
protected:
pgp_hash_alg_t alg_;
size_t size_;
Hash(pgp_hash_alg_t alg) : alg_(alg)
{
size_ = Hash::size(alg);
};
public:
pgp_hash_alg_t alg() const;
size_t size() const;
static std::unique_ptr<Hash> create(pgp_hash_alg_t alg);
virtual std::unique_ptr<Hash> clone() const = 0;
virtual void add(const void *buf, size_t len) = 0;
virtual void add(uint32_t val);
virtual void add(const pgp_mpi_t &mpi);
virtual size_t finish(uint8_t *digest = NULL) = 0;
virtual ~Hash();
/* Hash algorithm by string representation from cleartext-signed text */
static pgp_hash_alg_t alg(const char *name);
/* Hash algorithm representation for cleartext-signed text */
static const char *name(pgp_hash_alg_t alg);
/* Size of the hash algorithm output or 0 if algorithm is unknown */
static size_t size(pgp_hash_alg_t alg);
};
class CRC24 {
protected:
CRC24(){};
public:
static std::unique_ptr<CRC24> create();
virtual void add(const void *buf, size_t len) = 0;
virtual std::array<uint8_t, 3> finish() = 0;
virtual ~CRC24(){};
};
class HashList {
public:
std::vector<std::unique_ptr<Hash>> hashes;
void add_alg(pgp_hash_alg_t alg);
const Hash *get(pgp_hash_alg_t alg) const;
void add(const void *buf, size_t len);
};
} // namespace rnp
#endif
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