crypto/heimdal-0.6.3/lib/gssapi/import_sec_context.c

   1 /*
   2  * Copyright (c) 1999 - 2003 Kungliga Tekniska Högskolan
   3  * (Royal Institute of Technology, Stockholm, Sweden).
   4  * All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions
   8  * are met:
   9  *
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  *
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  *
  17  * 3. Neither the name of the Institute nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  */
  33
  34 #include "gssapi_locl.h"
  35
  36 RCSID("$Id: import_sec_context.c,v 1.7 2003/03/16 18:01:32 lha Exp $");
  37
  38 OM_uint32
  39 gss_import_sec_context (
  40     OM_uint32 * minor_status,
  41     const gss_buffer_t interprocess_token,
  42     gss_ctx_id_t * context_handle
  43     )
  44 {
  45     OM_uint32 ret = GSS_S_FAILURE;
  46     krb5_error_code kret;
  47     krb5_storage *sp;
  48     krb5_auth_context ac;
  49     krb5_address local, remote;
  50     krb5_address *localp, *remotep;
  51     krb5_data data;
  52     gss_buffer_desc buffer;
  53     krb5_keyblock keyblock;
  54     int32_t tmp;
  55     int32_t flags;
  56     OM_uint32 minor;
  57
  58     GSSAPI_KRB5_INIT ();
  59
  60     localp = remotep = NULL;
  61
  62     sp = krb5_storage_from_mem (interprocess_token->value,
  63                                 interprocess_token->length);
  64     if (sp == NULL) {
  65         *minor_status = ENOMEM;
  66         return GSS_S_FAILURE;
  67     }
  68
  69     *context_handle = malloc(sizeof(**context_handle));
  70     if (*context_handle == NULL) {
  71         *minor_status = ENOMEM;
  72         krb5_storage_free (sp);
  73         return GSS_S_FAILURE;
  74     }
  75     memset (*context_handle, 0, sizeof(**context_handle));
  76
  77     kret = krb5_auth_con_init (gssapi_krb5_context,
  78                                &(*context_handle)->auth_context);
  79     if (kret) {
  80         gssapi_krb5_set_error_string ();
  81         *minor_status = kret;
  82         ret = GSS_S_FAILURE;
  83         goto failure;
  84     }
  85
  86     /* flags */
  87
  88     *minor_status = 0;
  89
  90     if (krb5_ret_int32 (sp, &flags) != 0)
  91         goto failure;
  92
  93     /* retrieve the auth context */
  94
  95     ac = (*context_handle)->auth_context;
  96     krb5_ret_int32 (sp, &ac->flags);
  97     if (flags & SC_LOCAL_ADDRESS) {
  98         if (krb5_ret_address (sp, localp = &local) != 0)
  99             goto failure;
 100     }
 101
 102     if (flags & SC_REMOTE_ADDRESS) {
 103         if (krb5_ret_address (sp, remotep = &remote) != 0)
 104             goto failure;
 105     }
 106
 107     krb5_auth_con_setaddrs (gssapi_krb5_context, ac, localp, remotep);
 108     if (localp)
 109         krb5_free_address (gssapi_krb5_context, localp);
 110     if (remotep)
 111         krb5_free_address (gssapi_krb5_context, remotep);
 112     localp = remotep = NULL;
 113
 114     if (krb5_ret_int16 (sp, &ac->local_port) != 0)
 115         goto failure;
 116
 117     if (krb5_ret_int16 (sp, &ac->remote_port) != 0)
 118         goto failure;
 119     if (flags & SC_KEYBLOCK) {
 120         if (krb5_ret_keyblock (sp, &keyblock) != 0)
 121             goto failure;
 122         krb5_auth_con_setkey (gssapi_krb5_context, ac, &keyblock);
 123         krb5_free_keyblock_contents (gssapi_krb5_context, &keyblock);
 124     }
 125     if (flags & SC_LOCAL_SUBKEY) {
 126         if (krb5_ret_keyblock (sp, &keyblock) != 0)
 127             goto failure;
 128         krb5_auth_con_setlocalsubkey (gssapi_krb5_context, ac, &keyblock);
 129         krb5_free_keyblock_contents (gssapi_krb5_context, &keyblock);
 130     }
 131     if (flags & SC_REMOTE_SUBKEY) {
 132         if (krb5_ret_keyblock (sp, &keyblock) != 0)
 133             goto failure;
 134         krb5_auth_con_setremotesubkey (gssapi_krb5_context, ac, &keyblock);
 135         krb5_free_keyblock_contents (gssapi_krb5_context, &keyblock);
 136     }
 137     if (krb5_ret_int32 (sp, &ac->local_seqnumber))
 138         goto failure;
 139     if (krb5_ret_int32 (sp, &ac->remote_seqnumber))
 140         goto failure;
 141
 142     if (krb5_ret_int32 (sp, &tmp) != 0)
 143         goto failure;
 144     ac->keytype = tmp;
 145     if (krb5_ret_int32 (sp, &tmp) != 0)
 146         goto failure;
 147     ac->cksumtype = tmp;
 148
 149     /* names */
 150
 151     if (krb5_ret_data (sp, &data))
 152         goto failure;
 153     buffer.value  = data.data;
 154     buffer.length = data.length;
 155
 156     ret = gss_import_name (minor_status, &buffer, GSS_C_NT_EXPORT_NAME,
 157                            &(*context_handle)->source);
 158     if (ret) {
 159         ret = gss_import_name (minor_status, &buffer, GSS_C_NO_OID,
 160                                &(*context_handle)->source);
 161         if (ret) {
 162             krb5_data_free (&data);
 163             goto failure;
 164         }
 165     }
 166     krb5_data_free (&data);
 167
 168     if (krb5_ret_data (sp, &data) != 0)
 169         goto failure;
 170     buffer.value  = data.data;
 171     buffer.length = data.length;
 172
 173     ret = gss_import_name (minor_status, &buffer, GSS_C_NT_EXPORT_NAME,
 174                            &(*context_handle)->target);
 175     if (ret) {
 176         ret = gss_import_name (minor_status, &buffer, GSS_C_NO_OID,
 177                                &(*context_handle)->target);
 178         if (ret) {
 179             krb5_data_free (&data);
 180             goto failure;
 181         }
 182     }
 183     krb5_data_free (&data);
 184
 185     if (krb5_ret_int32 (sp, &tmp))
 186         goto failure;
 187     (*context_handle)->flags = tmp;
 188     if (krb5_ret_int32 (sp, &tmp))
 189         goto failure;
 190     (*context_handle)->more_flags = tmp;
 191     if (krb5_ret_int32 (sp, &tmp) == 0)
 192         (*context_handle)->lifetime = tmp;
 193     else
 194         (*context_handle)->lifetime = GSS_C_INDEFINITE;
 195
 196     return GSS_S_COMPLETE;
 197
 198 failure:
 199     krb5_auth_con_free (gssapi_krb5_context,
 200                         (*context_handle)->auth_context);
 201     if ((*context_handle)->source != NULL)
 202         gss_release_name(&minor, &(*context_handle)->source);
 203     if ((*context_handle)->target != NULL)
 204         gss_release_name(&minor, &(*context_handle)->target);
 205     if (localp)
 206         krb5_free_address (gssapi_krb5_context, localp);
 207     if (remotep)
 208         krb5_free_address (gssapi_krb5_context, remotep);
 209     free (*context_handle);
 210     *context_handle = GSS_C_NO_CONTEXT;
 211     return ret;
 212 }