mirror of
https://github.com/OpenVPN/openvpn3.git
synced 2024-09-20 20:13:05 +02:00
94 lines
2.6 KiB
C++
94 lines
2.6 KiB
C++
// OpenVPN -- An application to securely tunnel IP networks
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// over a single port, with support for SSL/TLS-based
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// session authentication and key exchange,
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// packet encryption, packet authentication, and
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// packet compression.
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//
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// Copyright (C) 2012-2015 OpenVPN Technologies, Inc.
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Affero General Public License Version 3
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// as published by the Free Software Foundation.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Affero General Public License for more details.
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//
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// You should have received a copy of the GNU Affero General Public License
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// along with this program in the COPYING file.
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// If not, see <http://www.gnu.org/licenses/>.
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#ifndef OPENVPN_COMMON_USERGROUP_H
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#define OPENVPN_COMMON_USERGROUP_H
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#include <pwd.h>
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#include <grp.h>
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#include <unistd.h>
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#include <sys/types.h>
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#include <cstring> // for std::strerror()
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#include <string>
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#include <openvpn/common/types.hpp>
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#include <openvpn/common/exception.hpp>
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#include <openvpn/common/format.hpp>
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namespace openvpn {
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class SetUserGroup
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{
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public:
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OPENVPN_EXCEPTION(user_group_err);
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SetUserGroup(const char *user, const char *group)
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: pw(NULL),
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gr(NULL)
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{
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if (user)
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{
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pw = getpwnam(user);
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if (!pw)
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OPENVPN_THROW(user_group_err, "user lookup failed for '" << user << '\'');
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user_name = user;
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}
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if (group)
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{
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gr = getgrnam(group);
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if (!gr)
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OPENVPN_THROW(user_group_err, "group lookup failed for '" << group << '\'');
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group_name = group;
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}
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}
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void activate() const
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{
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if (gr)
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{
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if (setgid(gr->gr_gid))
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OPENVPN_THROW(user_group_err, "setgid failed for group '" << group_name << "': " << std::strerror(errno));
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gid_t gr_list[1];
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gr_list[0] = gr->gr_gid;
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if (setgroups(1, gr_list))
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OPENVPN_THROW(user_group_err, "setgroups failed for group '" << group_name << "': " << std::strerror(errno));
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OPENVPN_LOG("GID set to '" << group_name << '\'');
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}
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if (pw)
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{
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if (setuid(pw->pw_uid))
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OPENVPN_THROW(user_group_err, "setuid failed for user '" << user_name << "': " << std::strerror(errno));
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OPENVPN_LOG("UID set to '" << user_name << '\'');
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}
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}
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private:
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std::string user_name;
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std::string group_name;
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struct passwd *pw;
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struct group *gr;
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};
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}
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#endif
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