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/**
* Copyright (C) 2021 Saturneric <[email protected]>
*
* This file is part of GpgFrontend.
*
* GpgFrontend is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* GpgFrontend is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with GpgFrontend. If not, see <https://www.gnu.org/licenses/>.
*
* The initial version of the source code is inherited from
* the gpg4usb project, which is under GPL-3.0-or-later.
*
* All the source code of GpgFrontend was modified and released by
* Saturneric <[email protected]> starting on May 12, 2021.
*
* SPDX-License-Identifier: GPL-3.0-or-later
*
*/
#include "KeyPackageOperator.h"
#include "FileOperator.h"
#include "function/PassphraseGenerator.h"
#include "function/gpg/GpgKeyGetter.h"
#include "function/gpg/GpgKeyImportExporter.h"
#include "qt-aes/qaesencryption.h"
namespace GpgFrontend {
bool KeyPackageOperator::GeneratePassphrase(
const std::filesystem::path& phrase_path, std::string& phrase) {
phrase = PassphraseGenerator::GetInstance().Generate(256);
SPDLOG_DEBUG("generated passphrase: {} bytes", phrase.size());
return FileOperator::WriteFileStd(phrase_path, phrase);
}
bool KeyPackageOperator::GenerateKeyPackage(
const std::filesystem::path& key_package_path,
const std::string& key_package_name, KeyIdArgsListPtr& key_ids,
std::string& phrase, bool secret) {
SPDLOG_DEBUG("generating key package: {}", key_package_name);
ByteArrayPtr key_export_data = nullptr;
if (!GpgKeyImportExporter::GetInstance().ExportAllKeys(
key_ids, key_export_data, secret)) {
SPDLOG_ERROR("failed to export keys");
return false;
}
auto key = QByteArray::fromStdString(phrase);
auto data = QString::fromStdString(*key_export_data).toLocal8Bit().toBase64();
auto hash_key = QCryptographicHash::hash(key, QCryptographicHash::Sha256);
QAESEncryption encryption(QAESEncryption::AES_256, QAESEncryption::ECB,
QAESEncryption::Padding::ISO);
auto encoded = encryption.encode(data, hash_key);
SPDLOG_DEBUG("writing key package: {}", key_package_name);
return FileOperator::WriteFileStd(key_package_path, encoded.toStdString());
}
bool KeyPackageOperator::ImportKeyPackage(
const std::filesystem::path& key_package_path,
const std::filesystem::path& phrase_path,
GpgFrontend::GpgImportInformation& import_info) {
SPDLOG_DEBUG("importing key package: {]", key_package_path.u8string());
std::string encrypted_data;
FileOperator::ReadFileStd(key_package_path, encrypted_data);
if (encrypted_data.empty()) {
SPDLOG_ERROR("failed to read key package: {}", key_package_path.u8string());
return false;
};
std::string passphrase;
FileOperator::ReadFileStd(phrase_path, passphrase);
SPDLOG_DEBUG("passphrase: {} bytes", passphrase.size());
if (passphrase.size() != 256) {
SPDLOG_ERROR("failed to read passphrase: {}", phrase_path.u8string());
return false;
}
auto hash_key = QCryptographicHash::hash(
QByteArray::fromStdString(passphrase), QCryptographicHash::Sha256);
auto encoded = QByteArray::fromStdString(encrypted_data);
QAESEncryption encryption(QAESEncryption::AES_256, QAESEncryption::ECB,
QAESEncryption::Padding::ISO);
auto decoded = encryption.removePadding(encryption.decode(encoded, hash_key));
auto key_data = QByteArray::fromBase64(decoded);
SPDLOG_DEBUG("key data size: {}", key_data.size());
if (!key_data.startsWith(GpgConstants::PGP_PUBLIC_KEY_BEGIN) &&
!key_data.startsWith(GpgConstants::PGP_PRIVATE_KEY_BEGIN)) {
return false;
}
auto key_data_ptr = std::make_unique<ByteArray>(key_data.toStdString());
import_info =
GpgKeyImportExporter::GetInstance().ImportKey(std::move(key_data_ptr));
return true;
}
std::string KeyPackageOperator::GenerateKeyPackageName() {
return generate_key_package_name();
}
} // namespace GpgFrontend
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