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/**
* 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.
*
* Foobar 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 Foobar. If not, see <https://www.gnu.org/licenses/>.
*
* The initial version of the source code is inherited from gpg4usb-team.
* Their source code version also complies with GNU General Public License.
*
* The source code version of this software was modified and released
* by Saturneric<[email protected]> starting on May 12, 2021.
*
*/
#include "gpg/GpgGenKeyInfo.h"
#include <easyloggingpp/easylogging++.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>
const std::vector<std::string> GpgFrontend::GenKeyInfo::SupportedKeyAlgo = {
"RSA", "DSA", "ED25519"};
const std::vector<std::string> GpgFrontend::GenKeyInfo::SupportedSubkeyAlgo = {
"RSA", "DSA", "ED25519", "ELG"};
void GpgFrontend::GenKeyInfo::setAlgo(const std::string &m_algo) {
LOG(INFO) << "GpgFrontend::GenKeyInfo::setAlgo m_algo" << m_algo;
reset_options();
if (!this->subKey) {
this->setAllowCertification(true);
} else {
this->setAllowCertification(false);
}
this->allowChangeCertification = false;
std::string lower_algo = std::string(m_algo);
boost::algorithm::to_lower(lower_algo);
LOG(INFO) << "GpgFrontend::GenKeyInfo::setAlgo lower_algo" << lower_algo;
if (lower_algo == "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.
*/
suggestMinKeySize = 1024;
suggestMaxKeySize = 4096;
suggestSizeAdditionStep = 1024;
setKeySize(2048);
} else if (lower_algo == "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);
allowChangeEncryption = false;
suggestMinKeySize = 1024;
suggestMaxKeySize = 3072;
suggestSizeAdditionStep = 1024;
setKeySize(2048);
} else if (lower_algo == "ed25519") {
/**
* GnuPG supports the Elgamal asymmetric encryption algorithm in key lengths
* ranging from 1024 to 4096 bits.
*/
setAllowEncryption(false);
allowChangeEncryption = false;
suggestMinKeySize = -1;
suggestMaxKeySize = -1;
suggestSizeAdditionStep = -1;
setKeySize(-1);
} else if (lower_algo == "elg") {
/**
* GnuPG supports the Elgamal asymmetric encryption algorithm in key lengths
* ranging from 1024 to 4096 bits.
*/
setAllowAuthentication(false);
allowChangeAuthentication = false;
setAllowSigning(false);
allowChangeSigning = false;
suggestMinKeySize = 1024;
suggestMaxKeySize = 4096;
suggestSizeAdditionStep = 1024;
setKeySize(2048);
}
this->algo = lower_algo;
}
void GpgFrontend::GenKeyInfo::reset_options() {
allowChangeEncryption = true;
setAllowEncryption(true);
allowChangeCertification = true;
setAllowCertification(true);
allowChangeSigning = true;
setAllowSigning(true);
allowChangeAuthentication = true;
setAllowAuthentication(true);
passPhrase.clear();
}
std::string GpgFrontend::GenKeyInfo::getKeySizeStr() const {
if (keySize > 0) {
return std::to_string(keySize);
} else {
return {};
}
}
void GpgFrontend::GenKeyInfo::setKeySize(int m_key_size) {
if (m_key_size < suggestMinKeySize || m_key_size > suggestMaxKeySize) {
return;
}
GenKeyInfo::keySize = m_key_size;
}
void GpgFrontend::GenKeyInfo::setExpired(
const boost::posix_time::ptime &m_expired) {
using namespace boost::gregorian;
auto current = boost::posix_time::second_clock::local_time();
if (isNonExpired() && m_expired < current + years(2)) {
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::nonExpired = m_non_expired;
}
void GpgFrontend::GenKeyInfo::setAllowEncryption(bool m_allow_encryption) {
if (allowChangeEncryption) GenKeyInfo::allowEncryption = m_allow_encryption;
}
void GpgFrontend::GenKeyInfo::setAllowCertification(
bool m_allow_certification) {
if (allowChangeCertification)
GenKeyInfo::allowCertification = m_allow_certification;
}
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