lib/gssapi/krb5/import_sec_context.c

   1 /*
   2  * Copyright (c) 1999 - 2000 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("$Id$");
  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     size_t sz;
  55     int32_t tmp;
  56     int32_t flags;
  57
  58     gssapi_krb5_init ();
  59
  60     sp = krb5_storage_from_mem (interprocess_token->value,
  61                                 interprocess_token->length);
  62     if (sp == NULL) {
  63         *minor_status = ENOMEM;
  64         return GSS_S_FAILURE;
  65     }
  66
  67     *context_handle = malloc(sizeof(**context_handle));
  68     if (*context_handle == NULL) {
  69         *minor_status = ENOMEM;
  70         krb5_storage_free (sp);
  71         return GSS_S_FAILURE;
  72     }
  73
  74     kret = krb5_auth_con_init (gssapi_krb5_context,
  75                                &(*context_handle)->auth_context);
  76     if (kret) {
  77         *minor_status = kret;
  78         ret = GSS_S_FAILURE;
  79         goto failure;
  80     }
  81
  82     /* flags */
  83
  84     krb5_ret_int32 (sp, &flags);
  85
  86     /* retrieve the auth context */
  87
  88     ac = (*context_handle)->auth_context;
  89     krb5_ret_int32 (sp, &ac->flags);
  90     if (flags & SC_LOCAL_ADDRESS)
  91         krb5_ret_address (sp, localp = &local);
  92     else
  93         localp = NULL;
  94     if (flags & SC_REMOTE_ADDRESS)
  95         krb5_ret_address (sp, remotep  = &remote);
  96     else
  97         remotep = NULL;
  98     krb5_auth_con_setaddrs (gssapi_krb5_context, ac, localp, remotep);
  99     if (localp)
 100         krb5_free_address (gssapi_krb5_context, localp);
 101     if (remotep)
 102         krb5_free_address (gssapi_krb5_context, remotep);
 103     krb5_ret_int16 (sp, &ac->local_port);
 104     krb5_ret_int16 (sp, &ac->remote_port);
 105     if (flags & SC_KEYBLOCK) {
 106         krb5_ret_keyblock (sp, &keyblock);
 107         krb5_auth_con_setkey (gssapi_krb5_context, ac, &keyblock);
 108         krb5_free_keyblock_contents (gssapi_krb5_context, &keyblock);
 109     }
 110     if (flags & SC_LOCAL_SUBKEY) {
 111         krb5_ret_keyblock (sp, &keyblock);
 112         krb5_auth_con_setlocalsubkey (gssapi_krb5_context, ac, &keyblock);
 113         krb5_free_keyblock_contents (gssapi_krb5_context, &keyblock);
 114     }
 115     if (flags & SC_REMOTE_SUBKEY) {
 116         krb5_ret_keyblock (sp, &keyblock);
 117         krb5_auth_con_setremotesubkey (gssapi_krb5_context, ac, &keyblock);
 118         krb5_free_keyblock_contents (gssapi_krb5_context, &keyblock);
 119     }
 120     krb5_ret_int32 (sp, &ac->local_seqnumber);
 121     krb5_ret_int32 (sp, &ac->remote_seqnumber);
 122
 123 #if 0
 124     krb5_ret_data (sp, &data);
 125     ac->authenticator = malloc (sizeof (*ac->authenticator));
 126     if (ac->authenticator == NULL) {
 127         *minor_status = ENOMEM;
 128         ret = GSS_S_FAILURE;
 129         goto failure;
 130     }
 131
 132     kret = decode_Authenticator (data.data, data.length,
 133                                  ac->authenticator, &sz);
 134     krb5_data_free (&data);
 135     if (kret) {
 136         *minor_status = kret;
 137         ret = GSS_S_FAILURE;
 138         goto failure;
 139     }
 140 #endif
 141
 142     krb5_ret_int32 (sp, &tmp);
 143     ac->keytype = tmp;
 144     krb5_ret_int32 (sp, &tmp);
 145     ac->cksumtype = tmp;
 146
 147     /* names */
 148
 149     krb5_ret_data (sp, &data);
 150     buffer.value  = data.data;
 151     buffer.length = data.length;
 152
 153     gss_import_name (minor_status, &buffer, GSS_C_NO_OID,
 154                      &(*context_handle)->source);
 155     krb5_data_free (&data);
 156
 157     krb5_ret_data (sp, &data);
 158     buffer.value  = data.data;
 159     buffer.length = data.length;
 160
 161     gss_import_name (minor_status, &buffer, GSS_C_NO_OID,
 162                      &(*context_handle)->target);
 163     krb5_data_free (&data);
 164
 165     krb5_ret_int32 (sp, &tmp);
 166     (*context_handle)->flags = tmp;
 167     krb5_ret_int32 (sp, &tmp);
 168     (*context_handle)->more_flags = tmp;
 169
 170     (*context_handle)->ticket = NULL;
 171
 172     return GSS_S_COMPLETE;
 173
 174 failure:
 175     krb5_auth_con_free (gssapi_krb5_context,
 176                         (*context_handle)->auth_context);
 177     free (*context_handle);
 178     *context_handle = GSS_C_NO_CONTEXT;
 179     return ret;
 180 }