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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 "GpgKeyManager.h"
#include <boost/algorithm/string.hpp>
#include <boost/date_time/posix_time/conversion.hpp>
#include "core/GpgModel.h"
#include "core/function/gpg/GpgBasicOperator.h"
#include "core/function/gpg/GpgKeyGetter.h"
#include "core/utils/GpgUtils.h"
GpgFrontend::GpgKeyManager::GpgKeyManager(int channel)
: SingletonFunctionObject<GpgKeyManager>(channel) {}
auto GpgFrontend::GpgKeyManager::SignKey(
const GpgFrontend::GpgKey& target, GpgFrontend::KeyArgsList& keys,
const std::string& uid,
const std::unique_ptr<boost::posix_time::ptime>& expires) -> bool {
GpgBasicOperator::GetInstance().SetSigners(keys);
unsigned int flags = 0;
unsigned int expires_time_t = 0;
if (expires == nullptr) {
flags |= GPGME_KEYSIGN_NOEXPIRE;
} else {
expires_time_t = to_time_t(*expires);
}
auto err = CheckGpgError(
gpgme_op_keysign(ctx_.DefaultContext(), static_cast<gpgme_key_t>(target),
uid.c_str(), expires_time_t, flags));
return CheckGpgError(err) == GPG_ERR_NO_ERROR;
}
auto GpgFrontend::GpgKeyManager::RevSign(
const GpgFrontend::GpgKey& key,
const GpgFrontend::SignIdArgsListPtr& signature_id) -> bool {
auto& key_getter = GpgKeyGetter::GetInstance();
for (const auto& sign_id : *signature_id) {
auto signing_key = key_getter.GetKey(sign_id.first);
assert(signing_key.IsGood());
auto err = CheckGpgError(
gpgme_op_revsig(ctx_.DefaultContext(), gpgme_key_t(key),
gpgme_key_t(signing_key), sign_id.second.c_str(), 0));
if (CheckGpgError(err) != GPG_ERR_NO_ERROR) return false;
}
return true;
}
auto GpgFrontend::GpgKeyManager::SetExpire(
const GpgFrontend::GpgKey& key, std::unique_ptr<GpgSubKey>& subkey,
std::unique_ptr<boost::posix_time::ptime>& expires) -> bool {
using namespace boost::posix_time;
unsigned long expires_time = 0;
if (expires != nullptr) expires_time = to_time_t(ptime(*expires));
const char* sub_fprs = nullptr;
if (subkey != nullptr) sub_fprs = subkey->GetFingerprint().c_str();
auto err = CheckGpgError(gpgme_op_setexpire(ctx_.DefaultContext(),
static_cast<gpgme_key_t>(key),
expires_time, sub_fprs, 0));
return CheckGpgError(err) == GPG_ERR_NO_ERROR;
}
auto GpgFrontend::GpgKeyManager::SetOwnerTrustLevel(const GpgKey& key,
int trust_level) -> bool {
if (trust_level < 0 || trust_level > 5) {
SPDLOG_ERROR("illegal owner trust level: {}", trust_level);
}
AutomatonNextStateHandler next_state_handler =
[](AutomatonState state, std::string status, std::string args) {
SPDLOG_DEBUG("next_state_handler state: {}, gpg_status: {}, args: {}",
state, status, args);
std::vector<std::string> tokens;
boost::split(tokens, args, boost::is_any_of(" "));
switch (state) {
case AS_START:
if (status == "GET_LINE" && args == "keyedit.prompt") {
return AS_COMMAND;
}
return AS_ERROR;
case AS_COMMAND:
if (status == "GET_LINE" && args == "edit_ownertrust.value") {
return AS_VALUE;
}
return AS_ERROR;
case AS_VALUE:
if (status == "GET_LINE" && args == "keyedit.prompt") {
return AS_QUIT;
} else if (status == "GET_BOOL" &&
args == "edit_ownertrust.set_ultimate.okay") {
return AS_REALLY_ULTIMATE;
}
return AS_ERROR;
case AS_REALLY_ULTIMATE:
if (status == "GET_LINE" && args == "keyedit.prompt") {
return AS_QUIT;
}
return AS_ERROR;
case AS_QUIT:
if (status == "GET_LINE" && args == "keyedit.save.okay") {
return AS_SAVE;
}
return AS_ERROR;
case AS_ERROR:
if (status == "GET_LINE" && args == "keyedit.prompt") {
return AS_QUIT;
}
return AS_ERROR;
default:
return AS_ERROR;
};
};
AutomatonActionHandler action_handler =
[trust_level](AutomatonHandelStruct& handler, AutomatonState state) {
SPDLOG_DEBUG("action_handler state: {}", state);
switch (state) {
case AS_COMMAND:
return std::string("trust");
case AS_VALUE:
handler.SetSuccess(true);
return std::to_string(trust_level);
case AS_REALLY_ULTIMATE:
handler.SetSuccess(true);
return std::string("Y");
case AS_QUIT:
return std::string("quit");
case AS_SAVE:
handler.SetSuccess(true);
return std::string("Y");
case AS_START:
case AS_ERROR:
return std::string("");
default:
return std::string("");
}
return std::string("");
};
auto key_fpr = key.GetFingerprint();
AutomatonHandelStruct handel_struct(key_fpr);
handel_struct.SetHandler(next_state_handler, action_handler);
GpgData data_out;
auto err = gpgme_op_interact(
ctx_.DefaultContext(), static_cast<gpgme_key_t>(key), 0,
GpgKeyManager::interactor_cb_fnc, (void*)&handel_struct, data_out);
return CheckGpgError(err) == GPG_ERR_NO_ERROR && handel_struct.Success();
}
auto GpgFrontend::GpgKeyManager::interactor_cb_fnc(void* handle,
const char* status,
const char* args, int fd)
-> gpgme_error_t {
auto handle_struct = static_cast<AutomatonHandelStruct*>(handle);
std::string status_s = status;
std::string args_s = args;
SPDLOG_DEBUG("cb start status: {}, args: {}, fd: {}, handle struct state: {}",
status_s, args_s, fd, handle_struct->CuurentStatus());
if (status_s == "KEY_CONSIDERED") {
std::vector<std::string> tokens;
boost::split(tokens, args, boost::is_any_of(" "));
if (tokens.empty() || tokens[0] != handle_struct->KeyFpr()) {
SPDLOG_ERROR("handle struct key fpr {} mismatch token: {}, exit...",
handle_struct->KeyFpr(), tokens[0]);
return -1;
}
return 0;
}
if (status_s == "GOT_IT" || status_s.empty()) {
SPDLOG_DEBUG("status GOT_IT, continue...");
return 0;
}
AutomatonState next_state = handle_struct->NextState(status_s, args_s);
if (next_state == AS_ERROR) {
SPDLOG_DEBUG("handle struct next state caught error, skipping...");
return GPG_ERR_FALSE;
}
if (next_state == AS_SAVE) {
handle_struct->SetSuccess(true);
}
// set state and preform action
handle_struct->SetStatus(next_state);
Command cmd = handle_struct->Action();
SPDLOG_DEBUG("handle struct action done, next state: {}, action cmd: {}",
next_state, cmd);
if (!cmd.empty()) {
gpgme_io_write(fd, cmd.c_str(), cmd.size());
gpgme_io_write(fd, "\n", 1);
} else if (status_s == "GET_LINE") {
// avoid trapping in this state
return GPG_ERR_FALSE;
}
return 0;
}
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