lib/gssapi/krb5/import_sec_context.c

   1 /*
   2  * Copyright (c) 1999 - 2001 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     int32_t tmp;
  55     int32_t flags;
  56     OM_uint32 minor;
  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     memset (*context_handle, 0, sizeof(**context_handle));
  74
  75     kret = krb5_auth_con_init (gssapi_krb5_context,
  76                                &(*context_handle)->auth_context);
  77     if (kret) {
  78         gssapi_krb5_set_error_string ();
  79         *minor_status = kret;
  80         ret = GSS_S_FAILURE;
  81         goto failure;
  82     }
  83
  84     /* flags */
  85
  86     krb5_ret_int32 (sp, &flags);
  87
  88     /* retrieve the auth context */
  89
  90     ac = (*context_handle)->auth_context;
  91     krb5_ret_int32 (sp, &ac->flags);
  92     if (flags & SC_LOCAL_ADDRESS)
  93         krb5_ret_address (sp, localp = &local);
  94     else
  95         localp = NULL;
  96     if (flags & SC_REMOTE_ADDRESS)
  97         krb5_ret_address (sp, remotep  = &remote);
  98     else
  99         remotep = NULL;
 100     krb5_auth_con_setaddrs (gssapi_krb5_context, ac, localp, remotep);
 101     if (localp)
 102         krb5_free_address (gssapi_krb5_context, localp);
 103     if (remotep)
 104         krb5_free_address (gssapi_krb5_context, remotep);
 105     krb5_ret_int16 (sp, &ac->local_port);
 106     krb5_ret_int16 (sp, &ac->remote_port);
 107     if (flags & SC_KEYBLOCK) {
 108         krb5_ret_keyblock (sp, &keyblock);
 109         krb5_auth_con_setkey (gssapi_krb5_context, ac, &keyblock);
 110         krb5_free_keyblock_contents (gssapi_krb5_context, &keyblock);
 111     }
 112     if (flags & SC_LOCAL_SUBKEY) {
 113         krb5_ret_keyblock (sp, &keyblock);
 114         krb5_auth_con_setlocalsubkey (gssapi_krb5_context, ac, &keyblock);
 115         krb5_free_keyblock_contents (gssapi_krb5_context, &keyblock);
 116     }
 117     if (flags & SC_REMOTE_SUBKEY) {
 118         krb5_ret_keyblock (sp, &keyblock);
 119         krb5_auth_con_setremotesubkey (gssapi_krb5_context, ac, &keyblock);
 120         krb5_free_keyblock_contents (gssapi_krb5_context, &keyblock);
 121     }
 122     krb5_ret_int32 (sp, &ac->local_seqnumber);
 123     krb5_ret_int32 (sp, &ac->remote_seqnumber);
 124
 125 #if 0
 126     {
 127             size_t sz;
 128
 129             krb5_ret_data (sp, &data);
 130             ac->authenticator = malloc (sizeof (*ac->authenticator));
 131             if (ac->authenticator == NULL) {
 132                 *minor_status = ENOMEM;
 133                 ret = GSS_S_FAILURE;
 134                 goto failure;
 135             }
 136
 137             kret = decode_Authenticator (data.data, data.length,
 138                                          ac->authenticator, &sz);
 139             krb5_data_free (&data);
 140             if (kret) {
 141                 *minor_status = kret;
 142                 ret = GSS_S_FAILURE;
 143                 goto failure;
 144             }
 145     }
 146 #endif
 147
 148     krb5_ret_int32 (sp, &tmp);
 149     ac->keytype = tmp;
 150     krb5_ret_int32 (sp, &tmp);
 151     ac->cksumtype = tmp;
 152
 153     /* names */
 154
 155     krb5_ret_data (sp, &data);
 156     buffer.value  = data.data;
 157     buffer.length = data.length;
 158
 159     ret = gss_import_name (minor_status, &buffer, GSS_C_NO_OID,
 160                            &(*context_handle)->source);
 161     krb5_data_free (&data);
 162     if (ret)
 163         goto failure;
 164
 165     krb5_ret_data (sp, &data);
 166     buffer.value  = data.data;
 167     buffer.length = data.length;
 168
 169     ret = gss_import_name (minor_status, &buffer, GSS_C_NO_OID,
 170                            &(*context_handle)->target);
 171     krb5_data_free (&data);
 172     if (ret)
 173         goto failure;
 174
 175     krb5_ret_int32 (sp, &tmp);
 176     (*context_handle)->flags = tmp;
 177     krb5_ret_int32 (sp, &tmp);
 178     (*context_handle)->more_flags = tmp;
 179
 180     return GSS_S_COMPLETE;
 181
 182 failure:
 183     krb5_auth_con_free (gssapi_krb5_context,
 184                         (*context_handle)->auth_context);
 185     if ((*context_handle)->source != NULL)
 186         gss_release_name(&minor, &(*context_handle)->source);
 187     if ((*context_handle)->target != NULL)
 188         gss_release_name(&minor, &(*context_handle)->target);
 189     free (*context_handle);
 190     *context_handle = GSS_C_NO_CONTEXT;
 191     return ret;
 192 }