mirror of
https://github.com/OpenVPN/openvpn3.git
synced 2024-09-20 12:12:15 +02:00
3fbe0a2701
Signed-off-by: David Sommerseth <davids@openvpn.net>
114 lines
3.3 KiB
C++
114 lines
3.3 KiB
C++
// 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) 2012-2020 OpenVPN Inc.
|
|
//
|
|
// This program is free software: you can redistribute it and/or modify
|
|
// it under the terms of the GNU Affero General Public License Version 3
|
|
// as published by the Free Software Foundation.
|
|
//
|
|
// 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
|
|
// GNU Affero General Public License for more details.
|
|
//
|
|
// You should have received a copy of the GNU Affero General Public License
|
|
// along with this program in the COPYING file.
|
|
// If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
// Low-level methods used to implement HTTP Digest authentication
|
|
|
|
#ifndef OPENVPN_PROXY_HTTPDIGEST_H
|
|
#define OPENVPN_PROXY_HTTPDIGEST_H
|
|
|
|
#include <cstring> // for std::strlen and others
|
|
#include <string>
|
|
|
|
#include <openvpn/crypto/hashstr.hpp>
|
|
|
|
namespace openvpn {
|
|
namespace HTTPProxy {
|
|
|
|
class Digest
|
|
{
|
|
public:
|
|
// calculate H(A1) as per spec
|
|
static std::string calcHA1(DigestFactory& digest_factory,
|
|
const std::string& alg,
|
|
const std::string& username,
|
|
const std::string& realm,
|
|
const std::string& password,
|
|
const std::string& nonce,
|
|
const std::string& cnonce)
|
|
{
|
|
HashString h1(digest_factory, CryptoAlgs::MD5);
|
|
h1.update(username);
|
|
h1.update(':');
|
|
h1.update(realm);
|
|
h1.update(':');
|
|
h1.update(password);
|
|
BufferPtr result = h1.final();
|
|
|
|
if (string::strcasecmp(alg, "md5-sess") == 0)
|
|
{
|
|
HashString h2(digest_factory, CryptoAlgs::MD5);
|
|
h2.update(*result);
|
|
h2.update(':');
|
|
h2.update(nonce);
|
|
h2.update(':');
|
|
h2.update(cnonce);
|
|
result = h2.final();
|
|
}
|
|
return render_hex_generic(*result);
|
|
}
|
|
|
|
// calculate request-digest/response-digest as per HTTP Digest spec
|
|
static std::string calcResponse(DigestFactory& digest_factory,
|
|
const std::string& hA1, // H(A1)
|
|
const std::string& nonce, // nonce from server
|
|
const std::string& nonce_count, // 8 hex digits
|
|
const std::string& cnonce, // client nonce
|
|
const std::string& qop, // qop-value: "", "auth", "auth-int"
|
|
const std::string& method, // method from the request
|
|
const std::string& digestUri, // requested URI
|
|
const std::string& hEntity) // H(entity body) if qop="auth-int"
|
|
{
|
|
// calculate H(A2)
|
|
HashString h1(digest_factory, CryptoAlgs::MD5);
|
|
h1.update(method);
|
|
h1.update(':');
|
|
h1.update(digestUri);
|
|
if (string::strcasecmp(qop, "auth-int") == 0)
|
|
{
|
|
h1.update(':');
|
|
h1.update(hEntity);
|
|
}
|
|
const std::string hA2 = h1.final_hex();
|
|
|
|
// calculate response
|
|
HashString h2(digest_factory, CryptoAlgs::MD5);
|
|
h2.update(hA1);
|
|
h2.update(':');
|
|
h2.update(nonce);
|
|
h2.update(':');
|
|
if (!qop.empty())
|
|
{
|
|
h2.update(nonce_count);
|
|
h2.update(':');
|
|
h2.update(cnonce);
|
|
h2.update(':');
|
|
h2.update(qop);
|
|
h2.update(':');
|
|
}
|
|
h2.update(hA2);
|
|
return h2.final_hex();
|
|
}
|
|
};
|
|
}
|
|
}
|
|
|
|
#endif
|