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/usr/include/gnutls/compat.h is in libgnutls28-dev 3.0.11-1ubuntu2.

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/*
 * Copyright (C) 2008-2011 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 3 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 <http://www.gnu.org/licenses/>
 *
 */

/* Typedefs for more compatibility with older GnuTLS. */

#ifndef _GNUTLS_COMPAT_H
#define _GNUTLS_COMPAT_H

#ifdef __cplusplus
extern "C"
{
#endif

#ifdef __GNUC__

#define _GNUTLS_GCC_VERSION (__GNUC__ * 10000 + __GNUC_MINOR__ * 100 + __GNUC_PATCHLEVEL__)

#if !defined GNUTLS_INTERNAL_BUILD
#if _GNUTLS_GCC_VERSION >= 30100
#define _GNUTLS_GCC_ATTR_DEPRECATED __attribute__ ((__deprecated__))
#endif
#endif

#endif /* __GNUC__ */

#ifndef _GNUTLS_GCC_ATTR_DEPRECATED
#define _GNUTLS_GCC_ATTR_DEPRECATED
#endif

/* gnutls_connection_end_t was made redundant in 2.99.0 */
#define gnutls_connection_end_t unsigned int

/* Stuff deprected in 2.x */
#define gnutls_cipher_algorithm gnutls_cipher_algorithm_t
#define gnutls_kx_algorithm gnutls_kx_algorithm_t
#define gnutls_paramsype gnutls_paramsype_t
#define gnutls_mac_algorithm gnutls_mac_algorithm_t
#define gnutls_digest_algorithm gnutls_digest_algorithm_t
#define gnutls_compression_method gnutls_compression_method_t
#define gnutls_connection_end gnutls_connection_end_t
#define gnutls_credentialsype gnutls_credentialsype_t
#define gnutls_certificateype gnutls_certificateype_t
#define gnutls_x509_crt_fmt gnutls_x509_crt_fmt_t
#define gnutls_openpgp_key_fmt gnutls_openpgp_key_fmt_t
#define gnutls_pk_algorithm gnutls_pk_algorithm_t
#define gnutls_sign_algorithm gnutls_sign_algorithm_t
#define gnutls_server_name gnutls_server_nameype_t
#define gnutls_protocol gnutls_protocol_version_t
#define gnutls_close_request gnutls_close_request_t
#define gnutls_openpgp_key_status gnutls_openpgp_key_status_t
#define gnutls_certificate_request gnutls_certificate_request_t
#define gnutls_certificate_status gnutls_certificate_status_t
#define gnutls_session gnutls_session_t
#define gnutls_alert_level gnutls_alert_level_t
#define gnutls_alert_description gnutls_alert_description_t
#define gnutls_x509_subject_alt_name gnutls_x509_subject_alt_name_t
#define gnutls_openpgp_key gnutls_openpgp_key_t
#define gnutls_openpgp_privkey gnutls_openpgp_privkey_t
#define gnutls_openpgp_keyring gnutls_openpgp_keyring_t
#define gnutls_x509_crt gnutls_x509_crt_t
#define gnutls_x509_privkey gnutls_x509_privkey_t
#define gnutls_x509_crl gnutls_x509_crl_t
#define gnutls_pkcs7 gnutls_pkcs7_t
#define gnutls_x509_crq gnutls_x509_crq_t
#define gnutls_pkcs_encrypt_flags gnutls_pkcs_encrypt_flags_t
#define gnutls_pkcs12_bag_type gnutls_pkcs12_bag_type_t
#define gnutls_pkcs12_bag gnutls_pkcs12_bag_t
#define gnutls_pkcs12 gnutls_pkcs12_t
#define gnutls_certificate_credentials gnutls_certificate_credentials_t
#define gnutls_anon_server_credentials gnutls_anon_server_credentials_t
#define gnutls_anon_client_credentials gnutls_anon_client_credentials_t
#define gnutls_srp_client_credentials gnutls_srp_client_credentials_t
#define gnutls_srp_server_credentials gnutls_srp_server_credentials_t
#define gnutls_dh_params gnutls_dh_params_t
#define gnutls_rsa_params gnutls_rsa_params_t
#define gnutls_params_type gnutls_params_type_t
#define gnutls_credentials_type gnutls_credentials_type_t
#define gnutls_certificate_type gnutls_certificate_type_t
#define gnutls_datum gnutls_datum_t
#define gnutls_transport_ptr gnutls_transport_ptr_t

/* Old SRP alerts removed in 2.1.x because the TLS-SRP RFC was
   modified to use the PSK alert. */
#define GNUTLS_A_MISSING_SRP_USERNAME GNUTLS_A_UNKNOWN_PSK_IDENTITY
#define GNUTLS_A_UNKNOWN_SRP_USERNAME GNUTLS_A_UNKNOWN_PSK_IDENTITY

/* OpenPGP stuff renamed in 2.1.x. */
#define gnutls_openpgp_key_fmt_t gnutls_openpgp_crt_fmt_t
#define GNUTLS_OPENPGP_KEY GNUTLS_OPENPGP_CERT
#define GNUTLS_OPENPGP_KEY_FINGERPRINT GNUTLS_OPENPGP_CERT_FINGERPRINT
#define gnutls_openpgp_send_key gnutls_openpgp_send_cert
#define gnutls_openpgp_key_status_t gnutls_openpgp_crt_status_t
#define gnutls_openpgp_key_t gnutls_openpgp_crt_t
#define gnutls_openpgp_key_init gnutls_openpgp_crt_init
#define gnutls_openpgp_key_deinit gnutls_openpgp_crt_deinit
#define gnutls_openpgp_key_import gnutls_openpgp_crt_import
#define gnutls_openpgp_key_export gnutls_openpgp_crt_export
#define gnutls_openpgp_key_get_key_usage gnutls_openpgp_crt_get_key_usage
#define gnutls_openpgp_key_get_fingerprint gnutls_openpgp_crt_get_fingerprint
#define gnutls_openpgp_key_get_pk_algorithm gnutls_openpgp_crt_get_pk_algorithm
#define gnutls_openpgp_key_get_name gnutls_openpgp_crt_get_name
#define gnutls_openpgp_key_get_version gnutls_openpgp_crt_get_version
#define gnutls_openpgp_key_get_creation_time gnutls_openpgp_crt_get_creation_time
#define gnutls_openpgp_key_get_expiration_time gnutls_openpgp_crt_get_expiration_time
#define gnutls_openpgp_key_get_id gnutls_openpgp_crt_get_id
#define gnutls_openpgp_key_check_hostname gnutls_openpgp_crt_check_hostname

/* OpenPGP stuff renamed in 2.3.x. */
#define gnutls_openpgp_crt_get_id gnutls_openpgp_crt_get_key_id

/* New better names renamed in 2.3.x, add these for backwards
   compatibility with old poor names.*/
#define GNUTLS_X509_CRT_FULL GNUTLS_CRT_PRINT_FULL
#define GNUTLS_X509_CRT_ONELINE GNUTLS_CRT_PRINT_ONELINE
#define GNUTLS_X509_CRT_UNSIGNED_FULL GNUTLS_CRT_PRINT_UNSIGNED_FULL

/* These old #define's violate the gnutls_* namespace. */
#define TLS_MASTER_SIZE GNUTLS_MASTER_SIZE
#define TLS_RANDOM_SIZE GNUTLS_RANDOM_SIZE

/* Namespace problems. */
#define LIBGNUTLS_VERSION GNUTLS_VERSION
#define LIBGNUTLS_VERSION_MAJOR GNUTLS_VERSION_MAJOR
#define LIBGNUTLS_VERSION_MINOR GNUTLS_VERSION_MINOR
#define LIBGNUTLS_VERSION_PATCH GNUTLS_VERSION_PATCH
#define LIBGNUTLS_VERSION_NUMBER GNUTLS_VERSION_NUMBER
#define LIBGNUTLS_EXTRA_VERSION GNUTLS_VERSION

/* The gnutls_retr_st was deprecated by gnutls_certificate_retrieve_function()
 * and gnutls_retr2_st.
 */
typedef struct gnutls_retr_st
{
  gnutls_certificate_type_t type;
  union
  {
    gnutls_x509_crt_t *x509;
    gnutls_openpgp_crt_t pgp;
  } cert;
  unsigned int ncerts;          /* one for pgp keys */

  union
  {
    gnutls_x509_privkey_t x509;
    gnutls_openpgp_privkey_t pgp;
  } key;

  unsigned int deinit_all;      /* if non zero all keys will be deinited */
} gnutls_retr_st;

typedef int gnutls_certificate_client_retrieve_function (gnutls_session_t,
                                                         const
                                                         gnutls_datum_t *
                                                         req_ca_rdn,
                                                         int nreqs,
                                                         const
                                                         gnutls_pk_algorithm_t
                                                         * pk_algos,
                                                         int
                                                         pk_algos_length,
                                                         gnutls_retr_st *);
typedef int gnutls_certificate_server_retrieve_function (gnutls_session_t,
                                                         gnutls_retr_st *);

void gnutls_certificate_client_set_retrieve_function
  (gnutls_certificate_credentials_t cred,
   gnutls_certificate_client_retrieve_function *
   func) _GNUTLS_GCC_ATTR_DEPRECATED;
void
  gnutls_certificate_server_set_retrieve_function
  (gnutls_certificate_credentials_t cred,
   gnutls_certificate_server_retrieve_function *
   func) _GNUTLS_GCC_ATTR_DEPRECATED;

  /* External signing callback.  No longer supported because it
   * was deprecated by the PKCS #11 API and gnutls_privkey_t. */
typedef int (*gnutls_sign_func) (gnutls_session_t session,
                                 void *userdata,
                                 gnutls_certificate_type_t cert_type,
                                 const gnutls_datum_t * cert,
                                 const gnutls_datum_t * hash,
                                 gnutls_datum_t * signature);

void
gnutls_sign_callback_set (gnutls_session_t session,
                          gnutls_sign_func sign_func, void *userdata)
  _GNUTLS_GCC_ATTR_DEPRECATED;
gnutls_sign_func
gnutls_sign_callback_get (gnutls_session_t session, void **userdata)
 _GNUTLS_GCC_ATTR_DEPRECATED;

/* This is a very dangerous and error-prone function.
 * Use gnutls_privkey_sign_hash() instead.
 */
  int gnutls_x509_privkey_sign_hash (gnutls_x509_privkey_t key,
                                        const gnutls_datum_t * hash,
                                        gnutls_datum_t * signature)
                                        _GNUTLS_GCC_ATTR_DEPRECATED;

  int gnutls_openpgp_privkey_sign_hash (gnutls_openpgp_privkey_t key,
                                       const gnutls_datum_t * hash,
                                       gnutls_datum_t * signature)
                                       _GNUTLS_GCC_ATTR_DEPRECATED;

/* we support the gnutls_privkey_sign_data() instead.
 */
  int gnutls_x509_privkey_sign_data (gnutls_x509_privkey_t key,
                                     gnutls_digest_algorithm_t digest,
                                     unsigned int flags,
                                     const gnutls_datum_t * data,
                                     void *signature,
                                     size_t * signature_size)
                                     _GNUTLS_GCC_ATTR_DEPRECATED;

  /* gnutls_pubkey_verify_data() */
  int gnutls_x509_crt_verify_data (gnutls_x509_crt_t crt,
                                   unsigned int flags,
                                   const gnutls_datum_t * data,
                                   const gnutls_datum_t * signature)
                                   _GNUTLS_GCC_ATTR_DEPRECATED;


  /* gnutls_pubkey_verify_hash() */
  int gnutls_x509_crt_verify_hash (gnutls_x509_crt_t crt,
                                   unsigned int flags,
                                   const gnutls_datum_t * hash,
                                   const gnutls_datum_t * signature)
                                   _GNUTLS_GCC_ATTR_DEPRECATED;

  /* gnutls_pubkey_get_verify_algorithm() */
  int gnutls_x509_crt_get_verify_algorithm (gnutls_x509_crt_t crt,
                                            const gnutls_datum_t * signature,
                                            gnutls_digest_algorithm_t * hash)
                                            _GNUTLS_GCC_ATTR_DEPRECATED;

  /* gnutls_pubkey_get_preferred_hash_algorithm() */
  int gnutls_x509_crt_get_preferred_hash_algorithm (gnutls_x509_crt_t crt,
                                                    gnutls_digest_algorithm_t
                                                    * hash,
                                                    unsigned int *mand)
                                                    _GNUTLS_GCC_ATTR_DEPRECATED;

  /* gnutls_x509_crq_privkey_sign() */
  int gnutls_x509_crq_sign (gnutls_x509_crq_t crq, gnutls_x509_privkey_t key)
                              _GNUTLS_GCC_ATTR_DEPRECATED;



  /* gnutls_x509_crl_privkey_sign */
  int gnutls_x509_crl_sign (gnutls_x509_crl_t crl,
                            gnutls_x509_crt_t issuer,
                            gnutls_x509_privkey_t issuer_key)
                            _GNUTLS_GCC_ATTR_DEPRECATED;

  /* functions to set priority of cipher suites
   */
  int gnutls_cipher_set_priority (gnutls_session_t session, const int *list)
  _GNUTLS_GCC_ATTR_DEPRECATED;
  int gnutls_mac_set_priority (gnutls_session_t session, const int *list)
  _GNUTLS_GCC_ATTR_DEPRECATED;
  int gnutls_compression_set_priority (gnutls_session_t session,
                                       const int *list)
                                       _GNUTLS_GCC_ATTR_DEPRECATED;
  int gnutls_kx_set_priority (gnutls_session_t session, const int *list)
  _GNUTLS_GCC_ATTR_DEPRECATED;
  int gnutls_protocol_set_priority (gnutls_session_t session,
                                    const int *list)
                                    _GNUTLS_GCC_ATTR_DEPRECATED;
  int gnutls_certificate_type_set_priority (gnutls_session_t session,
                                            const int *list)
                                            _GNUTLS_GCC_ATTR_DEPRECATED;

/* RSA params 
 */
  int gnutls_rsa_params_init (gnutls_rsa_params_t * rsa_params) _GNUTLS_GCC_ATTR_DEPRECATED;
  void gnutls_rsa_params_deinit (gnutls_rsa_params_t rsa_params) _GNUTLS_GCC_ATTR_DEPRECATED;
  int gnutls_rsa_params_cpy (gnutls_rsa_params_t dst,
                             gnutls_rsa_params_t src) _GNUTLS_GCC_ATTR_DEPRECATED;
  int gnutls_rsa_params_import_raw (gnutls_rsa_params_t rsa_params,
                                    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);
  int gnutls_rsa_params_generate2 (gnutls_rsa_params_t params,
                                   unsigned int bits) _GNUTLS_GCC_ATTR_DEPRECATED;
  int gnutls_rsa_params_export_raw (gnutls_rsa_params_t rsa,
                                    gnutls_datum_t * m, gnutls_datum_t * e,
                                    gnutls_datum_t * d, gnutls_datum_t * p,
                                    gnutls_datum_t * q, gnutls_datum_t * u,
                                    unsigned int *bits) _GNUTLS_GCC_ATTR_DEPRECATED;
  int gnutls_rsa_params_export_pkcs1 (gnutls_rsa_params_t params,
                                      gnutls_x509_crt_fmt_t format,
                                      unsigned char *params_data,
                                      size_t * params_data_size) _GNUTLS_GCC_ATTR_DEPRECATED;
  int gnutls_rsa_params_import_pkcs1 (gnutls_rsa_params_t params,
                                      const gnutls_datum_t * pkcs1_params,
                                      gnutls_x509_crt_fmt_t format) _GNUTLS_GCC_ATTR_DEPRECATED;

  int gnutls_rsa_export_get_pubkey (gnutls_session_t session,
                                    gnutls_datum_t * exponent,
                                    gnutls_datum_t * modulus) _GNUTLS_GCC_ATTR_DEPRECATED;
  int gnutls_rsa_export_get_modulus_bits (gnutls_session_t session) _GNUTLS_GCC_ATTR_DEPRECATED;
  int gnutls_set_default_export_priority (gnutls_session_t session) _GNUTLS_GCC_ATTR_DEPRECATED;

  void
    gnutls_certificate_set_rsa_export_params (gnutls_certificate_credentials_t
                                              res,
                                              gnutls_rsa_params_t rsa_params) _GNUTLS_GCC_ATTR_DEPRECATED;

#ifdef __cplusplus
}
#endif

#endif /* _GNUTLS_COMPAT_H */