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/**
* Copyright (C) 2018-present MongoDB, Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the Server Side Public License, version 1,
* as published by MongoDB, Inc.
*
* This program 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
* Server Side Public License for more details.
*
* You should have received a copy of the Server Side Public License
* along with this program. If not, see
* <http://www.mongodb.com/licensing/server-side-public-license>.
*
* As a special exception, the copyright holders give permission to link the
* code of portions of this program with the OpenSSL library under certain
* conditions as described in each individual source file and distribute
* linked combinations including the program with the OpenSSL library. You
* must comply with the Server Side Public License in all respects for
* all of the code used other than as permitted herein. If you modify file(s)
* with this exception, you may extend this exception to your version of the
* file(s), but you are not obligated to do so. If you do not wish to do so,
* delete this exception statement from your version. If you delete this
* exception statement from all source files in the program, then also delete
* it in the license file.
*/
#include <algorithm>
#include <string>
#include <sys/stat.h>
#include <vector>
#include <yaml-cpp/yaml.h>
#include "mongo/base/status_with.h"
#include "mongo/db/auth/security_key.h"
#include "mongo/util/str.h"
namespace mongo {
namespace {
std::string stripString(const std::string& filename, const std::string& str) {
std::string out;
out.reserve(str.size());
std::copy_if(str.begin(), str.end(), std::back_inserter(out), [&](const char ch) {
// don't copy any whitespace
if ((ch >= '\x09' && ch <= '\x0D') || ch == ' ') {
return false;
// uassert if string contains any non-base64 characters
} else if ((ch < 'A' || ch > 'Z') && (ch < 'a' || ch > 'z') && (ch < '0' || ch > '9') &&
ch != '+' && ch != '/' && ch != '=') {
uasserted(ErrorCodes::UnsupportedFormat,
str::stream() << "invalid char in key file " << filename << ": " << str);
}
return true;
});
return out;
}
} // namespace
StatusWith<std::vector<std::string>> readSecurityFile(const std::string& filename) try {
struct stat stats;
// check obvious file errors
if (stat(filename.c_str(), &stats) == -1) {
return Status(ErrorCodes::InvalidPath,
str::stream()
<< "Error reading file " << filename << ": " << strerror(errno));
}
#if !defined(_WIN32)
// check permissions: must be X00, where X is >= 4
if ((stats.st_mode & (S_IRWXG | S_IRWXO)) != 0) {
return Status(ErrorCodes::InvalidPath,
str::stream() << "permissions on " << filename << " are too open");
}
#endif
std::vector<std::string> ret;
const std::function<void(const YAML::Node&)> visitNode = [&](const YAML::Node& node) {
if (node.IsScalar()) {
ret.push_back(stripString(filename, node.Scalar()));
} else if (node.IsSequence()) {
for (const auto& child : node) {
visitNode(child);
}
} else {
uasserted(ErrorCodes::UnsupportedFormat,
"Only strings and sequences are supported for YAML key files");
}
};
visitNode(YAML::LoadFile(filename));
uassert(50981,
str::stream() << "Security key file " << filename << " does not contain any valid keys",
!ret.empty());
return ret;
} catch (const YAML::BadFile& e) {
return Status(ErrorCodes::InvalidPath,
str::stream() << "error opening file: " << filename << ": " << e.what());
} catch (const YAML::ParserException& e) {
return Status(ErrorCodes::UnsupportedFormat,
str::stream() << "error reading file: " << filename << ": " << e.what());
} catch (const DBException& e) {
return e.toStatus();
}
} // namespace mongo
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