libextra/gnutls_extra.c

   1 /*
   2  *      Copyright (C) 2001 Nikos Mavroyanopoulos
   3  *
   4  * This file is part of GNUTLS.
   5  *
   6  * GNUTLS-EXTRA is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * GNUTLS-EXTRA is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
  19  */
  20
  21 #include <gnutls_int.h>
  22 #include <gnutls_errors.h>
  23 #include <gnutls_extensions.h>
  24 #include <ext_srp.h>
  25 #include <gnutls_openpgp.h>
  26 #include <gnutls_extra.h>
  27 #include <gnutls_algorithms.h>
  28
  29 extern gnutls_extension_entry _gnutls_extensions[];
  30 extern const int _gnutls_extensions_size;
  31
  32 #define TOSTR(x) #x
  33
  34 static int _gnutls_add_srp_extension(void) {
  35 int i;
  36
  37         /* find the last element */
  38         for(i=0;i<_gnutls_extensions_size;i++) {
  39                 if (_gnutls_extensions[i].name==NULL) break;
  40         }
  41
  42         if (_gnutls_extensions[i].name==NULL && (i < _gnutls_extensions_size-1)) {
  43                 _gnutls_extensions[i].name = TOSTR(GNUTLS_EXTENSION_SRP);
  44                 _gnutls_extensions[i].type = GNUTLS_EXTENSION_SRP;
  45                 _gnutls_extensions[i].gnutls_ext_func_recv = _gnutls_srp_recv_params;
  46                 _gnutls_extensions[i].gnutls_ext_func_send = _gnutls_srp_send_params;
  47
  48                 _gnutls_extensions[i+1].name = 0;
  49
  50                 return 0; /* ok */
  51         }
  52
  53         return GNUTLS_E_MEMORY_ERROR;
  54 }
  55
  56 extern const int _gnutls_kx_algorithms_size;
  57 extern gnutls_kx_algo_entry _gnutls_kx_algorithms[];
  58 extern MOD_AUTH_STRUCT srp_auth_struct;
  59
  60 static int _gnutls_add_srp_auth_struct(void) {
  61 int i;
  62
  63         /* find the last element */
  64         for(i=0;i<_gnutls_kx_algorithms_size;i++) {
  65                 if (_gnutls_kx_algorithms[i].name==NULL) break;
  66         }
  67
  68         if (_gnutls_kx_algorithms[i].name==NULL && (i < _gnutls_kx_algorithms_size-1)) {
  69                 _gnutls_kx_algorithms[i].name = "SRP";
  70                 _gnutls_kx_algorithms[i].algorithm = GNUTLS_KX_SRP;
  71                 _gnutls_kx_algorithms[i].auth_struct = &srp_auth_struct;
  72
  73                 _gnutls_kx_algorithms[i+1].name = 0;
  74
  75                 return 0; /* ok */
  76         }
  77
  78         return GNUTLS_E_MEMORY_ERROR;
  79 }
  80
  81
  82 extern OPENPGP_KEY_CREATION_TIME_FUNC _E_gnutls_openpgp_extract_key_creation_time;
  83 extern OPENPGP_KEY_EXPIRATION_TIME_FUNC _E_gnutls_openpgp_extract_key_expiration_time;
  84 extern OPENPGP_VERIFY_KEY_FUNC _E_gnutls_openpgp_verify_key;
  85 extern OPENPGP_CERT2GNUTLS_CERT _E_gnutls_openpgp_cert2gnutls_cert;
  86 extern OPENPGP_FINGERPRINT _E_gnutls_openpgp_fingerprint;
  87 extern OPENPGP_KEY_REQUEST _E_gnutls_openpgp_request_key;
  88
  89 static void _gnutls_add_openpgp_functions(void) {
  90         _E_gnutls_openpgp_verify_key = gnutls_openpgp_verify_key;
  91         _E_gnutls_openpgp_extract_key_expiration_time = gnutls_openpgp_extract_key_expiration_time;
  92         _E_gnutls_openpgp_extract_key_creation_time = gnutls_openpgp_extract_key_creation_time;
  93         _E_gnutls_openpgp_fingerprint = gnutls_openpgp_fingerprint;
  94         _E_gnutls_openpgp_request_key = _gnutls_openpgp_request_key;
  95         _E_gnutls_openpgp_cert2gnutls_cert = _gnutls_openpgp_cert2gnutls_cert;
  96
  97         return;
  98 }
  99
 100 static int _gnutls_init_extra = 0;
 101
 102 /**
 103   * gnutls_global_init_extra - This function initializes the global state of gnutls-extra
 104   *
 105   * This function initializes the global state of gnutls-extra library to defaults.
 106   * Returns zero on success.
 107   *
 108   * Note that gnutls_global_init() has to be called before this function.
 109   * If this function is not called then the gnutls-extra library will not
 110   * be usable.
 111   *
 112   **/
 113 int gnutls_global_init_extra(void) {
 114 int ret;
 115
 116         _gnutls_init_extra++;
 117
 118         if (_gnutls_init_extra!=1) {
 119                 return 0;
 120         }
 121
 122         ret = _gnutls_add_srp_auth_struct();
 123         if (ret < 0) {
 124                 gnutls_assert();
 125                 return ret;
 126         }
 127
 128         ret = _gnutls_add_srp_extension();
 129         if (ret < 0) {
 130                 gnutls_assert();
 131                 return ret;
 132         }
 133
 134         _gnutls_add_openpgp_functions();
 135
 136         return 0;
 137 }