mirror of
https://github.com/ErikasKontenis/SabrehavenServer.git
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86 lines
2.5 KiB
C++
86 lines
2.5 KiB
C++
/**
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* Tibia GIMUD Server - a free and open-source MMORPG server emulator
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* Copyright (C) 2019 Sabrehaven and Mark Samman <mark.samman@gmail.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include "otpch.h"
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#include "rsa.h"
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#include <cryptopp/base64.h>
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#include <cryptopp/osrng.h>
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#include <fstream>
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#include <sstream>
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static CryptoPP::AutoSeededRandomPool prng;
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void RSA::decrypt(char* msg) const
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{
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try {
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CryptoPP::Integer m{ reinterpret_cast<uint8_t*>(msg), 128 };
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auto c = pk.CalculateInverse(prng, m);
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c.Encode(reinterpret_cast<uint8_t*>(msg), 128);
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}
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catch (const CryptoPP::Exception& e) {
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std::cout << e.what() << '\n';
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}
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}
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static const std::string header = "-----BEGIN RSA PRIVATE KEY-----";
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static const std::string footer = "-----END RSA PRIVATE KEY-----";
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void RSA::loadPEM(const std::string& filename)
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{
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std::ifstream file{ filename };
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if (!file.is_open()) {
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throw std::runtime_error("Missing file " + filename + ".");
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}
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std::ostringstream oss;
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for (std::string line; std::getline(file, line); oss << line);
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std::string key = oss.str();
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if (key.substr(0, header.size()) != header) {
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throw std::runtime_error("Missing RSA private key header.");
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}
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if (key.substr(key.size() - footer.size(), footer.size()) != footer) {
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throw std::runtime_error("Missing RSA private key footer.");
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}
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key = key.substr(header.size(), key.size() - footer.size());
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CryptoPP::ByteQueue queue;
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CryptoPP::Base64Decoder decoder;
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decoder.Attach(new CryptoPP::Redirector(queue));
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decoder.Put(reinterpret_cast<const uint8_t*>(key.c_str()), key.size());
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decoder.MessageEnd();
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try {
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pk.BERDecodePrivateKey(queue, false, queue.MaxRetrievable());
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if (!pk.Validate(prng, 3)) {
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throw std::runtime_error("RSA private key is not valid.");
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}
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}
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catch (const CryptoPP::Exception& e) {
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std::cout << e.what() << '\n';
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}
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}
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