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// OpenVPN -- An application to securely tunnel IP networks
// over a single port, with support for SSL/TLS-based
// session authentication and key exchange,
// packet encryption, packet authentication, and
// packet compression.
//
// Copyright (C) 2012- OpenVPN Inc.
//
// SPDX-License-Identifier: MPL-2.0 OR AGPL-3.0-only WITH openvpn3-openssl-exception
//
// test certificate subject and common name against tls_remote parameter
#ifndef OPENVPN_SSL_TLS_REMOTE_H
#define OPENVPN_SSL_TLS_REMOTE_H
#include <cstring>
#include <string>
#include <openvpn/common/string.hpp>
namespace openvpn::TLSRemote {
inline bool test(const std::string &tls_remote, const std::string &subject, const std::string &common_name)
{
return tls_remote == subject || string::starts_with(common_name, tls_remote);
}
inline void log(const std::string &tls_remote, const std::string &subject, const std::string &common_name)
{
OPENVPN_LOG("tls-remote validation"
<< std::endl
<< " tls-remote: '" << tls_remote << '\'' << std::endl
<< " Subj: '" << subject << '\'' << std::endl
<< " CN: '" << common_name << '\'');
}
// modifies x509 name in a way that is compatible with
// name remapping behavior on OpenVPN 2.x
inline std::string sanitize_x509_name(const std::string &str)
{
std::string ret;
bool leading_dash = true;
ret.reserve(str.length());
for (size_t i = 0; i < str.length(); ++i)
{
const char c = str[i];
if (c == '-' && leading_dash)
{
ret += '_';
continue;
}
leading_dash = false;
if ((c >= 'a' && c <= 'z')
|| (c >= 'A' && c <= 'Z')
|| (c >= '0' && c <= '9')
|| c == '_' || c == '-' || c == '.'
|| c == '@' || c == ':' || c == '/'
|| c == '=')
ret += c;
else
ret += '_';
}
return ret;
}
// modifies common name in a way that is compatible with
// name remapping behavior on OpenVPN 2.x
inline std::string sanitize_common_name(const std::string &str)
{
std::string ret;
ret.reserve(str.length());
for (size_t i = 0; i < str.length(); ++i)
{
const char c = str[i];
if ((c >= 'a' && c <= 'z')
|| (c >= 'A' && c <= 'Z')
|| (c >= '0' && c <= '9')
|| c == '_' || c == '-' || c == '.'
|| c == '@' || c == '/')
ret += c;
else
ret += '_';
}
return ret;
}
} // namespace openvpn::TLSRemote
#endif
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