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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 <qt-aes/qaesencryption.h>
#include "core/function/KeyPackageOperator.h"
#include "core/function/PassphraseGenerator.h"
#include "core/function/gpg/GpgKeyGetter.h"
#include "core/function/gpg/GpgKeyImportExporter.h"
#include "core/typedef/CoreTypedef.h"
#include "core/utils/GpgUtils.h"
#include "core/utils/IOUtils.h"
namespace GpgFrontend {
auto KeyPackageOperator::GeneratePassphrase(const QString& phrase_path,
QString& phrase) -> bool {
phrase = PassphraseGenerator::GetInstance().Generate(256);
GF_CORE_LOG_DEBUG("generated passphrase: {} bytes", phrase.size());
return WriteFile(phrase_path, phrase.toUtf8());
}
void KeyPackageOperator::GenerateKeyPackage(const QString& key_package_path,
const QString& key_package_name,
const KeyArgsList& keys,
QString& phrase, bool secret,
const OperationCallback& cb) {
GF_CORE_LOG_DEBUG("generating key package: {}", key_package_name);
GpgKeyImportExporter::GetInstance().ExportKeys(
keys, secret, true, false, false,
[=](GpgError err, const DataObjectPtr& data_obj) {
if (CheckGpgError(err) != GPG_ERR_NO_ERROR) {
GF_LOG_ERROR("export keys error, reason: {}",
DescribeGpgErrCode(err).second);
cb(-1, data_obj);
return;
}
if (CheckGpgError(err) == GPG_ERR_USER_1 || data_obj == nullptr ||
!data_obj->Check<GFBuffer>()) {
cb(-1, data_obj);
return;
}
auto gf_buffer = ExtractParams<GFBuffer>(data_obj, 0);
auto data = gf_buffer.ConvertToQByteArray().toBase64();
auto hash_key = QCryptographicHash::hash(phrase.toUtf8(),
QCryptographicHash::Sha256);
QAESEncryption encryption(QAESEncryption::AES_256, QAESEncryption::ECB,
QAESEncryption::Padding::ISO);
auto encoded_data = encryption.encode(data, hash_key);
GF_CORE_LOG_DEBUG("writing key package, name: {}", key_package_name);
cb(WriteFile(key_package_path, encoded_data) ? 0 : -1,
TransferParams());
return;
});
}
auto KeyPackageOperator::ImportKeyPackage(const QString& key_package_path,
const QString& phrase_path)
-> std::tuple<bool, std::shared_ptr<GpgImportInformation>> {
GF_CORE_LOG_DEBUG("importing key package: {}", key_package_path);
QByteArray encrypted_data;
ReadFile(key_package_path, encrypted_data);
if (encrypted_data.isEmpty()) {
GF_CORE_LOG_ERROR("failed to read key package: {}", key_package_path);
return {false, nullptr};
};
QByteArray passphrase;
ReadFile(phrase_path, passphrase);
GF_CORE_LOG_DEBUG("passphrase: {} bytes", passphrase.size());
if (passphrase.size() != 256) {
GF_CORE_LOG_ERROR("failed to read passphrase: {}", phrase_path);
return {false, nullptr};
}
auto hash_key =
QCryptographicHash::hash(passphrase, QCryptographicHash::Sha256);
auto encoded = 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);
GF_CORE_LOG_DEBUG("import key package, read key data size: {}",
key_data.size());
if (!key_data.startsWith(PGP_PUBLIC_KEY_BEGIN) &&
!key_data.startsWith(PGP_PRIVATE_KEY_BEGIN)) {
return {false, nullptr};
}
auto import_info =
GpgKeyImportExporter::GetInstance().ImportKey(GFBuffer(key_data));
return {true, import_info};
}
auto KeyPackageOperator::GenerateKeyPackageName() -> QString {
return generate_key_package_name();
}
/**
* @brief generate key package name
*
* @return QString key package name
*/
auto KeyPackageOperator::generate_key_package_name() -> QString {
return QString("KeyPackage_%1")
.arg(QRandomGenerator::global()->bounded(999, 99999));
}
} // namespace GpgFrontend
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