tdlight/td/mtproto/crypto.h

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//
// Copyright Aliaksei Levin (levlam@telegram.org), Arseny Smirnov (arseny30@gmail.com) 2014-2019
//
// Distributed under the Boost Software License, Version 1.0. (See accompanying
// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
//
#pragma once
#include "td/utils/BigNum.h"
#include "td/utils/common.h"
#include "td/utils/Slice.h"
#include "td/utils/Status.h"
#include "td/utils/UInt.h"
#include <utility>
namespace td {
/*** RSA ***/
class RSA {
public:
RSA clone() const;
int64 get_fingerprint() const;
size_t size() const;
size_t encrypt(unsigned char *from, size_t from_len, unsigned char *to) const;
void decrypt(Slice from, MutableSlice to) const;
static Result<RSA> from_pem(Slice pem);
private:
RSA(BigNum n, BigNum e);
BigNum n_;
BigNum e_;
};
/*** PublicRsaKeyInterface ***/
class PublicRsaKeyInterface {
public:
virtual ~PublicRsaKeyInterface() = default;
virtual Result<std::pair<RSA, int64>> get_rsa(const vector<int64> &fingerprints) = 0;
virtual void drop_keys() = 0;
};
/*** KDF ***/
void KDF(const string &auth_key, const UInt128 &msg_key, int X, UInt256 *aes_key, UInt256 *aes_iv);
void tmp_KDF(const UInt128 &server_nonce, const UInt256 &new_nonce, UInt256 *tmp_aes_key, UInt256 *tmp_aes_iv);
void KDF2(Slice auth_key, const UInt128 &msg_key, int X, UInt256 *aes_key, UInt256 *aes_iv);
} // namespace td