githubmirror/gnutls

lib/gnutlsxx.cpp
1 035 строк24 KB
Daiki Ueno
gnutlsxx: add const and explicit specifiers where possible
17 фев 2021, 08:41
17 фев 2021, 08:4167cab96
/*
 * Copyright (C) 2006-2012 Free Software Foundation, Inc.
 *
 * Author: Nikos Mavrogiannopoulos
 *
 * This file is part of GnuTLS.
 *
 * The GnuTLS is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public License
 * as published by the Free Software Foundation; either version 2.1 of
 * the License, or (at your option) any later version.
 *
 * This library 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program.  If not, see <https://www.gnu.org/licenses/>
 *
 */

#ifdef HAVE_CONFIG_H
# include <config.h>
#endif

#include <gnutls/gnutlsxx.h>

namespace gnutls
{

  inline static int RETWRAP (int ret)
  {
    if (ret < 0)
      throw (exception (ret));
    return ret;
  }

  session::session (unsigned int flags)
  {
    RETWRAP (gnutls_init (&s, flags));
  }

  session::~session ()
  {
    gnutls_deinit (s);
  }

  gnutls_session_t session::ptr()
  {
    return s;
  }

  int session::bye (gnutls_close_request_t how)
  {
    return RETWRAP (gnutls_bye (s, how));
  }

  int session::handshake ()
  {
    return RETWRAP (gnutls_handshake (s));
  }

  server_session::server_session ():session (GNUTLS_SERVER)
  {
  }

  server_session::server_session (int flags):session (GNUTLS_SERVER |
			      (flags & ~GNUTLS_CLIENT))
  {
  }

  server_session::~server_session ()
  {
  }

  int server_session::rehandshake ()
  {
    return RETWRAP (gnutls_rehandshake (s));
  }

  gnutls_alert_description_t session::get_alert () const
  {
    return gnutls_alert_get (s);
  }

  int session::send_alert (gnutls_alert_level_t level,
			   gnutls_alert_description_t desc)
  {
    return RETWRAP (gnutls_alert_send (s, level, desc));
  }

  int session::send_appropriate_alert (int err)
  {
    return RETWRAP (gnutls_alert_send_appropriate (s, err));
  }

  gnutls_cipher_algorithm_t session::get_cipher () const
  {
    return gnutls_cipher_get (s);
  }

  gnutls_kx_algorithm_t session::get_kx () const
  {
    return gnutls_kx_get (s);
  }

  gnutls_mac_algorithm_t session::get_mac () const
  {
    return gnutls_mac_get (s);
  }

  gnutls_compression_method_t session::get_compression () const
  {
    return gnutls_compression_get (s);
  }

  gnutls_certificate_type_t session::get_certificate_type () const
  {
    return gnutls_certificate_type_get (s);
  }

  void session::set_private_extensions (bool allow)
  {
    gnutls_handshake_set_private_extensions (s, (int) allow);
  }

  gnutls_handshake_description_t session::get_handshake_last_out () const
  {
    return gnutls_handshake_get_last_out (s);
  }

  gnutls_handshake_description_t session::get_handshake_last_in () const
  {
    return gnutls_handshake_get_last_in (s);
  }

  ssize_t session::send (const void *data, size_t sizeofdata)
  {
    return RETWRAP (gnutls_record_send (s, data, sizeofdata));
  }

  ssize_t session::recv (void *data, size_t sizeofdata)
  {
    return RETWRAP (gnutls_record_recv (s, data, sizeofdata));
  }

  bool session::get_record_direction () const
  {
    return gnutls_record_get_direction (s);
  }

  // maximum packet size
  size_t session::get_max_size () const
  {
    return gnutls_record_get_max_size (s);
  }

  void session::set_max_size (size_t size)
  {
    RETWRAP (gnutls_record_set_max_size (s, size));
  }

  size_t session::check_pending () const
  {
    return gnutls_record_check_pending (s);
  }


  void session::prf (size_t label_size, const char *label,
		     int server_random_first,
		     size_t extra_size, const char *extra,
		     size_t outsize, char *out)
  {
    RETWRAP (gnutls_prf (s, label_size, label, server_random_first,
			 extra_size, extra, outsize, out));
  }

  void session::prf_raw (size_t label_size, const char *label,
			 size_t seed_size, const char *seed,
			 size_t outsize, char *out)
  {
    RETWRAP (gnutls_prf_raw
	     (s, label_size, label, seed_size, seed, outsize, out));
  }


/* if you just want some defaults, use the following.
 */
  void session::set_priority (const char *prio, const char **err_pos)
  {
    RETWRAP (gnutls_priority_set_direct (s, prio, err_pos));
  }

  void session::set_priority (gnutls_priority_t p)
  {
    RETWRAP (gnutls_priority_set (s, p));
  }

  gnutls_protocol_t session::get_protocol_version () const
  {
    return gnutls_protocol_get_version (s);
  }

  void session::set_data (const void *session_data, size_t session_data_size)
  {
    RETWRAP (gnutls_session_set_data (s, session_data, session_data_size));
  }

  void session::get_data (void *session_data, size_t * session_data_size) const
  {
    RETWRAP (gnutls_session_get_data (s, session_data, session_data_size));
  }

  void session::get_data (gnutls_session_t session, gnutls_datum_t & data) const
  {
    RETWRAP (gnutls_session_get_data2 (s, &data));

  }

  void session::get_id (void *session_id, size_t * session_id_size) const
  {
    RETWRAP (gnutls_session_get_id (s, session_id, session_id_size));
  }

  bool session::is_resumed () const
  {
    int ret = gnutls_session_is_resumed (s);

    return (ret != 0);
  }

  bool session::get_peers_certificate (std::vector < gnutls_datum_t >
				       &out_certs) const
  {
    const gnutls_datum_t *certs;
    unsigned int certs_size;

    certs = gnutls_certificate_get_peers (s, &certs_size);

    if (certs == NULL)
      return false;

    for (unsigned int i = 0; i < certs_size; i++)
      out_certs.push_back (certs[i]);

    return true;
  }

  bool session::get_peers_certificate (const gnutls_datum_t ** certs,
				       unsigned int *certs_size) const
  {
    *certs = gnutls_certificate_get_peers (s, certs_size);

    if (*certs == NULL)
      return false;
    return true;
  }

  void session::get_our_certificate (gnutls_datum_t & cert) const
  {
    const gnutls_datum_t *d;

    d = gnutls_certificate_get_ours (s);
    if (d == NULL)
      throw (exception (GNUTLS_E_INVALID_REQUEST));

    cert = *d;
  }

  time_t session::get_peers_certificate_activation_time () const
  {
    return gnutls_certificate_activation_time_peers (s);
  }

  time_t session::get_peers_certificate_expiration_time () const
  {
    return gnutls_certificate_expiration_time_peers (s);
  }
  void session::verify_peers_certificate (unsigned int &status) const
  {
    RETWRAP (gnutls_certificate_verify_peers2 (s, &status));
  }


  client_session::client_session ():session (GNUTLS_CLIENT)
  {
  }

  client_session::client_session (int flags):session (GNUTLS_CLIENT |
				  (flags & ~GNUTLS_SERVER))
  {
  }

  client_session::~client_session ()
  {
  }

// client session
  void client_session::set_verify_cert (const char *hostname, unsigned flags)
  {
    gnutls_session_set_verify_cert(s, hostname, flags);
  }

  void client_session::set_server_name (gnutls_server_name_type_t type,
					const void *name, size_t name_length)
  {
    RETWRAP (gnutls_server_name_set (s, type, name, name_length));
  }

  bool client_session::get_request_status ()
  {
    return RETWRAP (gnutls_certificate_client_get_request_status (s));
  }

// server_session
  void server_session::get_server_name (void *data, size_t * data_length,
					unsigned int *type,
					unsigned int indx) const
  {
    RETWRAP (gnutls_server_name_get (s, data, data_length, type, indx));
  }

// internal DB stuff
  static int store_function (void *_db, gnutls_datum_t key,
			     gnutls_datum_t data)
  {
    try
    {
      DB *db = static_cast < DB * >(_db);

      if (db->store (key, data) == false)
	return -1;
    }
    catch (...)
    {
      return -1;
    }

    return 0;
  }

  const static gnutls_datum_t null_datum = { NULL, 0 };

  static gnutls_datum_t retrieve_function (void *_db, gnutls_datum_t key)
  {
    gnutls_datum_t data;

    try
    {
      DB *db = static_cast < DB * >(_db);

      if (db->retrieve (key, data) == false)
	return null_datum;

    }
    catch (...)
    {
      return null_datum;
    }

    return data;
  }

  static int remove_function (void *_db, gnutls_datum_t key)
  {
    try
    {
      DB *db = static_cast < DB * >(_db);

      if (db->remove (key) == false)
	return -1;
    }
    catch (...)
    {
      return -1;
    }

    return 0;
  }

  void server_session::set_db (const DB & db)
  {
    gnutls_db_set_ptr (s, const_cast < DB * >(&db));
    gnutls_db_set_store_function (s, store_function);
    gnutls_db_set_retrieve_function (s, retrieve_function);
    gnutls_db_set_remove_function (s, remove_function);
  }

  void server_session::set_db_cache_expiration (unsigned int seconds)
  {
    gnutls_db_set_cache_expiration (s, seconds);
  }

  void server_session::db_remove () const
  {
    gnutls_db_remove_session (s);
  }

  bool server_session::db_check_entry (const gnutls_datum_t & session_data) const
  {
    int ret = gnutls_db_check_entry (s, session_data);

    if (ret != 0)
      return true;
    return false;
  }

  void session::set_max_handshake_packet_length (size_t max)
  {
    gnutls_handshake_set_max_packet_length (s, max);
  }

  void session::clear_credentials ()
  {
    gnutls_credentials_clear (s);
  }

  void session::set_credentials (const credentials & cred)
  {
    RETWRAP (gnutls_credentials_set (s, cred.get_type (), cred.ptr ()));
  }

  const char *server_session::get_srp_username () const
  {
#ifdef ENABLE_SRP
    return gnutls_srp_server_get_username (s);
#else
    return NULL;
#endif
  }

  const char *server_session::get_psk_username () const
  {
    return gnutls_psk_server_get_username (s);
  }


  void session::set_transport_ptr (gnutls_transport_ptr_t ptr)
  {
    gnutls_transport_set_ptr (s, ptr);
  }

  void session::set_transport_ptr (gnutls_transport_ptr_t recv_ptr,
				   gnutls_transport_ptr_t send_ptr)
  {
    gnutls_transport_set_ptr2 (s, recv_ptr, send_ptr);
  }


  gnutls_transport_ptr_t session::get_transport_ptr () const
  {
    return gnutls_transport_get_ptr (s);
  }

  void session::get_transport_ptr (gnutls_transport_ptr_t & recv_ptr,
				   gnutls_transport_ptr_t & send_ptr) const
  {
    gnutls_transport_get_ptr2 (s, &recv_ptr, &send_ptr);
  }

  void session::set_transport_lowat (size_t num)
  {
    throw (exception (GNUTLS_E_UNIMPLEMENTED_FEATURE));
  }

  void session::set_transport_push_function (gnutls_push_func push_func)
  {
    gnutls_transport_set_push_function (s, push_func);
  }

  void session::set_transport_vec_push_function (gnutls_vec_push_func vec_push_func)
  {
    gnutls_transport_set_vec_push_function (s, vec_push_func);
  }

  void session::set_transport_pull_function (gnutls_pull_func pull_func)
  {
    gnutls_transport_set_pull_function (s, pull_func);
  }

  void session::set_transport_pull_timeout_function (gnutls_pull_timeout_func pull_timeout_func)
  {
    gnutls_transport_set_pull_timeout_function (s, pull_timeout_func);
  }

  void session::set_user_ptr (void *ptr)
  {
    gnutls_session_set_ptr (s, ptr);
  }

  void *session::get_user_ptr () const
  {
    return gnutls_session_get_ptr (s);
  }

  void session::send_openpgp_cert (gnutls_openpgp_crt_status_t status)
  {
#ifdef ENABLE_OPENPGP
    gnutls_openpgp_send_cert (s, status);
#endif
  }

  void session::set_dh_prime_bits (unsigned int bits)
  {
    gnutls_dh_set_prime_bits (s, bits);
  }

  unsigned int session::get_dh_secret_bits () const
  {
    return RETWRAP (gnutls_dh_get_secret_bits (s));
  }

  unsigned int session::get_dh_peers_public_bits () const
  {
    return RETWRAP (gnutls_dh_get_peers_public_bits (s));
  }

  unsigned int session::get_dh_prime_bits () const
  {
    return RETWRAP (gnutls_dh_get_prime_bits (s));
  }

  void session::get_dh_group (gnutls_datum_t & gen,
			      gnutls_datum_t & prime) const
  {
    RETWRAP (gnutls_dh_get_group (s, &gen, &prime));
  }

  void session::get_dh_pubkey (gnutls_datum_t & raw_key) const
  {
    RETWRAP (gnutls_dh_get_pubkey (s, &raw_key));
  }

#ifdef ENABLE_RSA_EXPORT
  void session::get_rsa_export_pubkey (gnutls_datum_t & exponent,
				       gnutls_datum_t & modulus) const
  {
    RETWRAP (gnutls_rsa_export_get_pubkey (s, &exponent, &modulus));
  }

  unsigned int session::get_rsa_export_modulus_bits () const
  {
    return RETWRAP (gnutls_rsa_export_get_modulus_bits (s));
  }

  void certificate_credentials::
    set_rsa_export_params (const rsa_params & params)
  {
    gnutls_certificate_set_rsa_export_params (cred, params.get_params_t ());
  }
#endif

  void server_session::
    set_certificate_request (gnutls_certificate_request_t req)
  {
    gnutls_certificate_server_set_request (s, req);
  }

  gnutls_credentials_type_t session::get_auth_type () const
  {
    return gnutls_auth_get_type (s);
  }

  gnutls_credentials_type_t session::get_server_auth_type () const
  {
    return gnutls_auth_server_get_type (s);
  }

  gnutls_credentials_type_t session::get_client_auth_type () const
  {
    return gnutls_auth_client_get_type (s);
  }


  certificate_credentials::~certificate_credentials ()
  {
    gnutls_certificate_free_credentials (cred);
  }

  certificate_credentials::certificate_credentials ():credentials
    (GNUTLS_CRD_CERTIFICATE)
  {
    RETWRAP (gnutls_certificate_allocate_credentials (&cred));
    set_ptr (cred);
  }

  void certificate_server_credentials::
    set_params_function (gnutls_params_function * func)
  {
    gnutls_certificate_set_params_function (cred, func);
  }

  anon_server_credentials::anon_server_credentials ():credentials
    (GNUTLS_CRD_ANON)
  {
    RETWRAP (gnutls_anon_allocate_server_credentials (&cred));
    set_ptr (cred);
  }

  anon_server_credentials::~anon_server_credentials ()
  {
    gnutls_anon_free_server_credentials (cred);
  }

  void anon_server_credentials::set_dh_params (const dh_params & params)
  {
    gnutls_anon_set_server_dh_params (cred, params.get_params_t ());
  }

  void anon_server_credentials::set_params_function (gnutls_params_function *
						     func)
  {
    gnutls_anon_set_server_params_function (cred, func);
  }

  anon_client_credentials::anon_client_credentials ():credentials
    (GNUTLS_CRD_ANON)
  {
    RETWRAP (gnutls_anon_allocate_client_credentials (&cred));
    set_ptr (cred);
  }

  anon_client_credentials::~anon_client_credentials ()
  {
    gnutls_anon_free_client_credentials (cred);
  }

  void certificate_credentials::free_keys ()
  {
    gnutls_certificate_free_keys (cred);
  }

  void certificate_credentials::free_cas ()
  {
    gnutls_certificate_free_cas (cred);
  }

  void certificate_credentials::free_ca_names ()
  {
    gnutls_certificate_free_ca_names (cred);
  }

  void certificate_credentials::free_crls ()
  {
    gnutls_certificate_free_crls (cred);
  }


  void certificate_credentials::set_dh_params (const dh_params & params)
  {
    gnutls_certificate_set_dh_params (cred, params.get_params_t ());
  }

  void certificate_credentials::set_verify_flags (unsigned int flags)
  {
    gnutls_certificate_set_verify_flags (cred, flags);
  }

  void certificate_credentials::set_verify_limits (unsigned int max_bits,
						   unsigned int max_depth)
  {
    gnutls_certificate_set_verify_limits (cred, max_bits, max_depth);
  }

  void certificate_credentials::set_x509_trust_file (const char *cafile,
						     gnutls_x509_crt_fmt_t
						     type)
  {
    RETWRAP (gnutls_certificate_set_x509_trust_file (cred, cafile, type));
  }

  void certificate_credentials::set_x509_trust (const gnutls_datum_t & CA,
						gnutls_x509_crt_fmt_t type)
  {
    RETWRAP (gnutls_certificate_set_x509_trust_mem (cred, &CA, type));
  }


  void certificate_credentials::set_x509_crl_file (const char *crlfile,
						   gnutls_x509_crt_fmt_t type)
  {
    RETWRAP (gnutls_certificate_set_x509_crl_file (cred, crlfile, type));
  }

  void certificate_credentials::set_x509_crl (const gnutls_datum_t & CRL,
					      gnutls_x509_crt_fmt_t type)
  {
    RETWRAP (gnutls_certificate_set_x509_crl_mem (cred, &CRL, type));
  }

  void certificate_credentials::set_x509_key_file (const char *certfile,
						   const char *keyfile,
						   gnutls_x509_crt_fmt_t type)
  {
    RETWRAP (gnutls_certificate_set_x509_key_file
	     (cred, certfile, keyfile, type));
  }

  void certificate_credentials::set_x509_key (const gnutls_datum_t & CERT,
					      const gnutls_datum_t & KEY,
					      gnutls_x509_crt_fmt_t type)
  {
    RETWRAP (gnutls_certificate_set_x509_key_mem (cred, &CERT, &KEY, type));
  }

  void certificate_credentials::
    set_simple_pkcs12_file (const char *pkcs12file,
			    gnutls_x509_crt_fmt_t type, const char *password)
  {
    RETWRAP (gnutls_certificate_set_x509_simple_pkcs12_file
	     (cred, pkcs12file, type, password));
  }

  void certificate_credentials::set_x509_key (gnutls_x509_crt_t * cert_list,
					      int cert_list_size,
					      gnutls_x509_privkey_t key)
  {
    RETWRAP (gnutls_certificate_set_x509_key
	     (cred, cert_list, cert_list_size, key));
  }

  void certificate_credentials::set_x509_trust (gnutls_x509_crt_t * ca_list,
						int ca_list_size)
  {
    RETWRAP (gnutls_certificate_set_x509_trust (cred, ca_list, ca_list_size));
  }

  void certificate_credentials::set_x509_crl (gnutls_x509_crl_t * crl_list,
					      int crl_list_size)
  {
    RETWRAP (gnutls_certificate_set_x509_crl (cred, crl_list, crl_list_size));
  }

  void certificate_credentials::
    set_retrieve_function (gnutls_certificate_retrieve_function * func)
  {
    gnutls_certificate_set_retrieve_function (cred, func);
  }

// SRP

#ifdef ENABLE_SRP

  srp_server_credentials::srp_server_credentials ():credentials
    (GNUTLS_CRD_SRP)
  {
    RETWRAP (gnutls_srp_allocate_server_credentials (&cred));
    set_ptr (cred);
  }

  srp_server_credentials::~srp_server_credentials ()
  {
    gnutls_srp_free_server_credentials (cred);
  }

  srp_client_credentials::srp_client_credentials ():credentials
    (GNUTLS_CRD_SRP)
  {
    RETWRAP (gnutls_srp_allocate_client_credentials (&cred));
    set_ptr (cred);
  }

  srp_client_credentials::~srp_client_credentials ()
  {
    gnutls_srp_free_client_credentials (cred);
  }

  void srp_client_credentials::set_credentials (const char *username,
						const char *password)
  {
    RETWRAP (gnutls_srp_set_client_credentials (cred, username, password));
  }

  void srp_server_credentials::
    set_credentials_file (const char *password_file,
			  const char *password_conf_file)
  {
    RETWRAP (gnutls_srp_set_server_credentials_file
	     (cred, password_file, password_conf_file));
  }

  void srp_server_credentials::
    set_credentials_function (gnutls_srp_server_credentials_function * func)
  {
    gnutls_srp_set_server_credentials_function (cred, func);
  }

  void srp_client_credentials::
    set_credentials_function (gnutls_srp_client_credentials_function * func)
  {
    gnutls_srp_set_client_credentials_function (cred, func);
  }

#endif /* ENABLE_SRP */

// PSK

psk_server_credentials::psk_server_credentials ():credentials
    (GNUTLS_CRD_PSK)
  {
    RETWRAP (gnutls_psk_allocate_server_credentials (&cred));
    set_ptr (cred);
  }

  psk_server_credentials::~psk_server_credentials ()
  {
    gnutls_psk_free_server_credentials (cred);
  }

  void psk_server_credentials::
    set_credentials_file (const char *password_file)
  {
    RETWRAP (gnutls_psk_set_server_credentials_file (cred, password_file));
  }

  void psk_server_credentials::
    set_credentials_function (gnutls_psk_server_credentials_function * func)
  {
    gnutls_psk_set_server_credentials_function (cred, func);
  }

  void psk_server_credentials::set_dh_params (const dh_params & params)
  {
    gnutls_psk_set_server_dh_params (cred, params.get_params_t ());
  }

  void psk_server_credentials::set_params_function (gnutls_params_function *
						    func)
  {
    gnutls_psk_set_server_params_function (cred, func);
  }

  psk_client_credentials::psk_client_credentials ():credentials
    (GNUTLS_CRD_PSK)
  {
    RETWRAP (gnutls_psk_allocate_client_credentials (&cred));
    set_ptr (cred);
  }

  psk_client_credentials::~psk_client_credentials ()
  {
    gnutls_psk_free_client_credentials (cred);
  }

  void psk_client_credentials::set_credentials (const char *username,
						const gnutls_datum_t & key,
						gnutls_psk_key_flags flags)
  {
    RETWRAP (gnutls_psk_set_client_credentials (cred, username, &key, flags));
  }

  void psk_client_credentials::
    set_credentials_function (gnutls_psk_client_credentials_function * func)
  {
    gnutls_psk_set_client_credentials_function (cred, func);
  }

  credentials::credentials (gnutls_credentials_type_t t):type (t),
    cred (NULL)
  {
  }

  gnutls_credentials_type_t credentials::get_type () const
  {
    return type;
  }

  void *credentials::ptr () const
  {
    return cred;
  }

  void credentials::set_ptr (void *ptr)
  {
    cred = ptr;
  }

  exception::exception (int x)
  {
    retcode = x;
  }

  int exception::get_code ()
  {
    return retcode;
  }

  const char *exception::what () const throw ()
  {
    return gnutls_strerror (retcode);
  }

  dh_params::dh_params ()
  {
    RETWRAP (gnutls_dh_params_init (&params));
  }

  dh_params::~dh_params ()
  {
    gnutls_dh_params_deinit (params);
  }

  void dh_params::import_raw (const gnutls_datum_t & prime,
			      const gnutls_datum_t & generator)
  {
    RETWRAP (gnutls_dh_params_import_raw (params, &prime, &generator));
  }

  void dh_params::import_pkcs3 (const gnutls_datum_t & pkcs3_params,
				gnutls_x509_crt_fmt_t format)
  {
    RETWRAP (gnutls_dh_params_import_pkcs3 (params, &pkcs3_params, format));
  }

  void dh_params::generate (unsigned int bits)
  {
    RETWRAP (gnutls_dh_params_generate2 (params, bits));
  }

  void dh_params::export_pkcs3 (gnutls_x509_crt_fmt_t format,
				unsigned char *params_data,
				size_t * params_data_size)
  {
    RETWRAP (gnutls_dh_params_export_pkcs3
	     (params, format, params_data, params_data_size));
  }

  void dh_params::export_raw (gnutls_datum_t & prime,
			      gnutls_datum_t & generator)
  {
    RETWRAP (gnutls_dh_params_export_raw (params, &prime, &generator, NULL));
  }

  gnutls_dh_params_t dh_params::get_params_t () const
  {
    return params;
  }

  dh_params & dh_params::operator= (const dh_params & src)
  {
    dh_params *dst = new dh_params;
    int ret;

    ret = gnutls_dh_params_cpy (dst->params, src.params);

    if (ret < 0)
      {
	delete dst;
        throw (exception (ret));
      }

    std::swap (this->params, dst->params);
    delete dst;

    return *this;
  }

// RSA

#ifdef ENABLE_RSA_EXPORT
  rsa_params::rsa_params ()
  {
    RETWRAP (gnutls_rsa_params_init (&params));
  }

  rsa_params::~rsa_params ()
  {
    gnutls_rsa_params_deinit (params);
  }

  void rsa_params::import_pkcs1 (const gnutls_datum_t & pkcs1_params,
				 gnutls_x509_crt_fmt_t format)
  {
    RETWRAP (gnutls_rsa_params_import_pkcs1 (params, &pkcs1_params, format));
  }

  void rsa_params::generate (unsigned int bits)
  {
    RETWRAP (gnutls_rsa_params_generate2 (params, bits));
  }

  void rsa_params::export_pkcs1 (gnutls_x509_crt_fmt_t format,
				 unsigned char *params_data,
				 size_t * params_data_size)
  {
    RETWRAP (gnutls_rsa_params_export_pkcs1
	     (params, format, params_data, params_data_size));
  }

  gnutls_rsa_params_t rsa_params::get_params_t () const
  {
    return params;
  }

  rsa_params & rsa_params::operator= (const rsa_params & src)
  {
    rsa_params *dst = new rsa_params;
    int ret;

    ret = gnutls_rsa_params_cpy (dst->params, src.params);

    if (ret < 0)
      {
	delete dst;
        throw (exception (ret));
      }

    std::swap (this->params, dst->params);
    delete dst;

    return *this;
  }

  void rsa_params::import_raw (const gnutls_datum_t & m,
			       const gnutls_datum_t & e,
			       const gnutls_datum_t & d,
			       const gnutls_datum_t & p,
			       const gnutls_datum_t & q,
			       const gnutls_datum_t & u)
  {

    RETWRAP (gnutls_rsa_params_import_raw (params, &m, &e, &d, &p, &q, &u));
  }


  void rsa_params::export_raw (gnutls_datum_t & m, gnutls_datum_t & e,
			       gnutls_datum_t & d, gnutls_datum_t & p,
			       gnutls_datum_t & q, gnutls_datum_t & u)
  {
    RETWRAP (gnutls_rsa_params_export_raw
	     (params, &m, &e, &d, &p, &q, &u, NULL));
  }
#endif
}				// namespace gnutls