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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/GpgConstants.h"
#include <gpg-error.h>
#include <boost/algorithm/string/predicate.hpp>
#include <boost/filesystem.hpp>
const char* GpgFrontend::GpgConstants::PGP_CRYPT_BEGIN =
"-----BEGIN PGP MESSAGE-----";
const char* GpgFrontend::GpgConstants::PGP_CRYPT_END =
"-----END PGP MESSAGE-----";
const char* GpgFrontend::GpgConstants::PGP_SIGNED_BEGIN =
"-----BEGIN PGP SIGNED MESSAGE-----";
const char* GpgFrontend::GpgConstants::PGP_SIGNED_END =
"-----END PGP SIGNATURE-----";
const char* GpgFrontend::GpgConstants::PGP_SIGNATURE_BEGIN =
"-----BEGIN PGP SIGNATURE-----";
const char* GpgFrontend::GpgConstants::PGP_SIGNATURE_END =
"-----END PGP SIGNATURE-----";
const char* GpgFrontend::GpgConstants::GPG_FRONTEND_SHORT_CRYPTO_HEAD =
"GpgF_Scpt://";
gpgme_error_t GpgFrontend::check_gpg_error(gpgme_error_t err) {
if (gpg_err_code(err) != GPG_ERR_NO_ERROR) {
LOG(ERROR) << "[Error " << gpg_err_code(err)
<< "] Source: " << gpgme_strsource(err)
<< " Description: " << gpgme_strerror(err);
}
return err;
}
gpg_err_code_t GpgFrontend::check_gpg_error_2_err_code(gpgme_error_t err,
gpgme_error_t predict) {
auto err_code = gpg_err_code(err);
if (err_code != predict) {
LOG(ERROR) << "[Error " << gpg_err_code(err)
<< "] Source: " << gpgme_strsource(err)
<< " Description: " << gpgme_strerror(err);
}
return err_code;
}
// error-handling
gpgme_error_t GpgFrontend::check_gpg_error(gpgme_error_t err,
const std::string& comment) {
if (gpg_err_code(err) != GPG_ERR_NO_ERROR) {
LOG(ERROR) << "[Error " << gpg_err_code(err)
<< "] Source: " << gpgme_strsource(err)
<< " Description: " << gpgme_strerror(err) << " " << comment;
}
return err;
}
std::string GpgFrontend::beautify_fingerprint(
GpgFrontend::BypeArrayConstRef fingerprint) {
auto _fingerprint = fingerprint;
unsigned len = fingerprint.size();
if ((len > 0) && (len % 4 == 0))
for (unsigned n = 0; 4 * (n + 1) < len; ++n)
_fingerprint.insert(static_cast<int>(5u * n + 4u), " ");
return fingerprint;
}
// trim from start (in place)
static inline void ltrim(std::string& s) {
s.erase(s.begin(), std::find_if(s.begin(), s.end(), [](unsigned char ch) {
return !std::isspace(ch);
}));
}
// trim from end (in place)
static inline void rtrim(std::string& s) {
s.erase(std::find_if(s.rbegin(), s.rend(),
[](unsigned char ch) { return !std::isspace(ch); })
.base(),
s.end());
}
// trim from both ends (in place)
static inline std::string trim(std::string& s) {
ltrim(s);
rtrim(s);
return s;
}
std::string GpgFrontend::read_all_data_in_file(const std::string& path) {
using namespace boost::filesystem;
class path file_info(path.c_str());
if (!exists(file_info) || !is_regular_file(path))
throw std::runtime_error("no permission");
std::ifstream in_file;
in_file.open(path, std::ios::in);
if (!in_file.good()) throw std::runtime_error("cannot open file");
std::istreambuf_iterator<char> begin(in_file);
std::istreambuf_iterator<char> end;
std::string in_buffer(begin, end);
in_file.close();
return in_buffer;
}
bool GpgFrontend::write_buffer_to_file(const std::string& path,
const std::string& out_buffer) {
std::ofstream out_file(boost::filesystem::path(path).string(), std::ios::out);
if (!out_file.good()) return false;
out_file.write(out_buffer.c_str(), out_buffer.size());
out_file.close();
return true;
}
std::string GpgFrontend::get_file_extension(const std::string& path) {
// Create a Path object from given string
boost::filesystem::path path_obj(path);
// Check if file name in the path object has extension
if (path_obj.has_extension()) {
// Fetch the extension from path object and return
return path_obj.extension().string();
}
// In case of no extension return empty string
return {};
}
std::string GpgFrontend::get_only_file_name_with_path(const std::string& path) {
// Create a Path object from given string
boost::filesystem::path path_obj(path);
// Check if file name in the path object has extension
if (path_obj.has_filename()) {
// Fetch the extension from path object and return
return (path_obj.parent_path() / path_obj.stem()).string();
}
// In case of no extension return empty string
throw std::runtime_error("invalid file path");
}
/*
* isSigned returns:
* - 0, if text isn't signed at all
* - 1, if text is partially signed
* - 2, if text is completly signed
*/
int GpgFrontend::text_is_signed(GpgFrontend::BypeArrayRef text) {
using boost::algorithm::ends_with;
using boost::algorithm::starts_with;
auto trim_text = trim(text);
if (starts_with(trim_text, GpgConstants::PGP_SIGNED_BEGIN) &&
ends_with(trim_text, GpgConstants::PGP_SIGNED_END))
return 2;
else if (text.find(GpgConstants::PGP_SIGNED_BEGIN) != std::string::npos &&
text.find(GpgConstants::PGP_SIGNED_END) != std::string::npos)
return 1;
else
return 0;
}
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