AuthHMAC.h

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/*
 * Copyright (C) 2006-2020 Istituto Italiano di Tecnologia (IIT)
 * Copyright (C) 2010 Daniel Krieg <krieg@fias.uni-frankfurt.de>
 * All rights reserved.
 *
 * This software may be modified and distributed under the terms of the
 * BSD-3-Clause license. See the accompanying LICENSE file for details.
 */
 
#ifndef YARP_OS_IMPL_AUTHHMAC_H
#define YARP_OS_IMPL_AUTHHMAC_H
 
#include <yarp/os/InputStream.h>
#include <yarp/os/OutputStream.h>
 
#include <hmac_sha2.h>
 
#define DIGEST_SIZE SHA256_DIGEST_SIZE
#define HMAC_CONTEXT hmac_sha256_ctx
#define HMAC_INIT hmac_sha256_init
#define HMAC_REINIT hmac_sha256_reinit
#define HMAC_UPDATE hmac_sha256_update
#define HMAC_FINAL hmac_sha256_final
#define NONCE_LEN 8
 
namespace yarp {
namespace os {
namespace impl {
 
class YARP_os_impl_API AuthHMAC
{
public:
    AuthHMAC();
 
    virtual ~AuthHMAC() = default;
 
    bool authSource(yarp::os::InputStream* streamIn, yarp::os::OutputStream* streamOut);
    bool authDest(yarp::os::InputStream* streamIn, yarp::os::OutputStream* streamOut);
 
private:
    static bool send_hmac(yarp::os::OutputStream* stream, unsigned char* nonce, unsigned char* mac);
    static bool receive_hmac(yarp::os::InputStream* stream, unsigned char* nonce, unsigned char* mac);
    static bool check_hmac(unsigned char* mac, unsigned char* mac_check);
    static void fill_nonce(unsigned char* nonce);
 
    bool authentication_enabled;
    HMAC_CONTEXT context;
};
 
} // namespace impl
} // namespace os
} // namespace yarp
 
#endif // YARP_OS_IMPL_AUTHHMAC_H