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/**
* Copyright (C) 2021 Saturneric
*
* 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 "core/GpgGenKeyInfo.h"
#include <boost/date_time/gregorian/greg_date.hpp>
#include <boost/date_time/gregorian/greg_duration.hpp>
#include <boost/date_time/gregorian/gregorian_types.hpp>
#include <string>
#include <vector>
void GpgFrontend::GenKeyInfo::SetAlgo(const std::string &m_algo) {
LOG(INFO) << "set algo" << m_algo;
// Check algo if supported
std::string algo_args = std::string(m_algo);
boost::algorithm::to_upper(algo_args);
if (standalone_) {
if (!subkey_) {
auto support_algo = GetSupportedKeyAlgoStandalone();
auto it = std::find(support_algo.begin(), support_algo.end(), algo_args);
// Algo Not Supported
if (it == support_algo.end()) return;
} else {
auto support_algo = GetSupportedSubkeyAlgoStandalone();
auto it = std::find(support_algo.begin(), support_algo.end(), algo_args);
// Algo Not Supported
if (it == support_algo.end()) return;
}
} else {
if (!subkey_) {
auto support_algo = GetSupportedKeyAlgo();
auto it = std::find(support_algo.begin(), support_algo.end(), algo_args);
// Algo Not Supported
if (it == support_algo.end()) return;
} else {
auto support_algo = GetSupportedSubkeyAlgo();
auto it = std::find(support_algo.begin(), support_algo.end(), algo_args);
// Algo Not Supported
if (it == support_algo.end()) return;
}
}
// reset all options
reset_options();
if (!this->subkey_) {
this->SetAllowCertification(true);
} else {
this->SetAllowCertification(false);
}
this->allow_change_certification_ = false;
if (!standalone_) boost::algorithm::to_lower(algo_args);
if (algo_args == "rsa") {
/**
* RSA is the world’s premier asymmetric cryptographic algorithm,
* and is built on the difficulty of factoring extremely large composites.
* GnuPG supports RSA with key sizes of between 1024 and 4096 bits.
*/
suggest_min_key_size_ = 1024;
suggest_max_key_size_ = 4096;
suggest_size_addition_step_ = 1024;
SetKeyLength(2048);
} else if (algo_args == "dsa") {
/**
* Algorithm (DSA) as a government standard for digital signatures.
* Originally, it supported key lengths between 512 and 1024 bits.
* Recently, NIST has declared 512-bit keys obsolete:
* now, DSA is available in 1024, 2048 and 3072-bit lengths.
*/
SetAllowEncryption(false);
allow_change_encryption_ = false;
suggest_min_key_size_ = 1024;
suggest_max_key_size_ = 3072;
suggest_size_addition_step_ = 1024;
SetKeyLength(2048);
} else if (algo_args == "ed25519") {
/**
* GnuPG supports the Elgamal asymmetric encryption algorithm in key lengths
* ranging from 1024 to 4096 bits.
*/
SetAllowEncryption(false);
allow_change_encryption_ = false;
suggest_min_key_size_ = -1;
suggest_max_key_size_ = -1;
suggest_size_addition_step_ = -1;
SetKeyLength(-1);
} else if (algo_args == "elg") {
/**
* GnuPG supports the Elgamal asymmetric encryption algorithm in key lengths
* ranging from 1024 to 4096 bits.
*/
SetAllowAuthentication(false);
allow_change_authentication_ = false;
SetAllowSigning(false);
allow_change_signing_ = false;
suggest_min_key_size_ = 1024;
suggest_max_key_size_ = 4096;
suggest_size_addition_step_ = 1024;
SetKeyLength(2048);
}
this->algo_ = algo_args;
}
void GpgFrontend::GenKeyInfo::reset_options() {
allow_change_encryption_ = true;
SetAllowEncryption(true);
allow_change_certification_ = true;
SetAllowCertification(true);
allow_change_signing_ = true;
SetAllowSigning(true);
allow_change_authentication_ = true;
SetAllowAuthentication(true);
passphrase_.clear();
}
std::string GpgFrontend::GenKeyInfo::GetKeySizeStr() const {
if (key_size_ > 0) {
return std::to_string(key_size_);
} else {
return {};
}
}
void GpgFrontend::GenKeyInfo::SetKeyLength(int m_key_size) {
if (m_key_size < suggest_min_key_size_ ||
m_key_size > suggest_max_key_size_) {
return;
}
GenKeyInfo::key_size_ = m_key_size;
}
void GpgFrontend::GenKeyInfo::SetExpireTime(
const boost::posix_time::ptime &m_expired) {
using namespace boost::gregorian;
if (!IsNonExpired()) {
GenKeyInfo::expired_ = m_expired;
}
}
void GpgFrontend::GenKeyInfo::SetNonExpired(bool m_non_expired) {
using namespace boost::posix_time;
if (!m_non_expired) this->expired_ = from_time_t(0);
GenKeyInfo::non_expired_ = m_non_expired;
}
void GpgFrontend::GenKeyInfo::SetAllowEncryption(bool m_allow_encryption) {
if (allow_change_encryption_)
GenKeyInfo::allow_encryption_ = m_allow_encryption;
}
void GpgFrontend::GenKeyInfo::SetAllowCertification(
bool m_allow_certification) {
if (allow_change_certification_)
GenKeyInfo::allow_certification_ = m_allow_certification;
}
GpgFrontend::GenKeyInfo::GenKeyInfo(bool m_is_sub_key, bool m_standalone)
: standalone_(m_standalone), subkey_(m_is_sub_key) {
SetAlgo("rsa");
}
const std::vector<std::string> &GpgFrontend::GenKeyInfo::GetSupportedKeyAlgo() {
static const std::vector<std::string> support_key_algo = {"RSA", "DSA",
"ELG"
"ED25519",
"CV25519"};
return support_key_algo;
}
const std::vector<std::string>
&GpgFrontend::GenKeyInfo::GetSupportedSubkeyAlgo() {
static const std::vector<std::string> support_subkey_algo = {
"RSA", "DSA", "ELG", "ED25519"};
return support_subkey_algo;
}
const std::vector<std::string>
&GpgFrontend::GenKeyInfo::GetSupportedKeyAlgoStandalone() {
static const std::vector<std::string> support_subkey_algo_standalone = {
"RSA", "DSA"};
return support_subkey_algo_standalone;
}
const std::vector<std::string>
&GpgFrontend::GenKeyInfo::GetSupportedSubkeyAlgoStandalone() {
static const std::vector<std::string> support_subkey_algo_standalone = {
"RSA", "DSA", "ELG-E"};
return support_subkey_algo_standalone;
}
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