lib/gssapi/krb5/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 "gsskrb5_locl.h"
  35
  36 OM_uint32 GSSAPI_CALLCONV
  37 _gsskrb5_import_sec_context (
  38     OM_uint32 * minor_status,
  39     const gss_buffer_t interprocess_token,
  40     gss_ctx_id_t * context_handle
  41     )
  42 {
  43     OM_uint32 ret = GSS_S_FAILURE;
  44     krb5_context context;
  45     krb5_error_code kret;
  46     krb5_storage *sp;
  47     krb5_auth_context ac;
  48     krb5_address local, remote;
  49     krb5_address *localp, *remotep;
  50     krb5_data data;
  51     gss_buffer_desc buffer;
  52     krb5_keyblock keyblock;
  53     int32_t flags, tmp;
  54     gsskrb5_ctx ctx;
  55     gss_name_t name;
  56
  57     GSSAPI_KRB5_INIT (&context);
  58
  59     *context_handle = GSS_C_NO_CONTEXT;
  60
  61     localp = remotep = NULL;
  62
  63     sp = krb5_storage_from_mem (interprocess_token->value,
  64                                 interprocess_token->length);
  65     if (sp == NULL) {
  66         *minor_status = ENOMEM;
  67         return GSS_S_FAILURE;
  68     }
  69
  70     ctx = calloc(1, sizeof(*ctx));
  71     if (ctx == NULL) {
  72         *minor_status = ENOMEM;
  73         krb5_storage_free (sp);
  74         return GSS_S_FAILURE;
  75     }
  76     HEIMDAL_MUTEX_init(&ctx->ctx_id_mutex);
  77
  78     kret = krb5_auth_con_init (context,
  79                                &ctx->auth_context);
  80     if (kret) {
  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 = ctx->auth_context;
  96     if (krb5_ret_int32 (sp, &tmp) != 0)
  97         goto failure;
  98     ac->flags = tmp;
  99     if (flags & SC_LOCAL_ADDRESS) {
 100         if (krb5_ret_address (sp, localp = &local) != 0)
 101             goto failure;
 102     }
 103
 104     if (flags & SC_REMOTE_ADDRESS) {
 105         if (krb5_ret_address (sp, remotep = &remote) != 0)
 106             goto failure;
 107     }
 108
 109     krb5_auth_con_setaddrs (context, ac, localp, remotep);
 110     if (localp)
 111         krb5_free_address (context, localp);
 112     if (remotep)
 113         krb5_free_address (context, remotep);
 114     localp = remotep = NULL;
 115
 116     if (krb5_ret_int16 (sp, &ac->local_port) != 0)
 117         goto failure;
 118
 119     if (krb5_ret_int16 (sp, &ac->remote_port) != 0)
 120         goto failure;
 121     if (flags & SC_KEYBLOCK) {
 122         if (krb5_ret_keyblock (sp, &keyblock) != 0)
 123             goto failure;
 124         krb5_auth_con_setkey (context, ac, &keyblock);
 125         krb5_free_keyblock_contents (context, &keyblock);
 126     }
 127     if (flags & SC_LOCAL_SUBKEY) {
 128         if (krb5_ret_keyblock (sp, &keyblock) != 0)
 129             goto failure;
 130         krb5_auth_con_setlocalsubkey (context, ac, &keyblock);
 131         krb5_free_keyblock_contents (context, &keyblock);
 132     }
 133     if (flags & SC_REMOTE_SUBKEY) {
 134         if (krb5_ret_keyblock (sp, &keyblock) != 0)
 135             goto failure;
 136         krb5_auth_con_setremotesubkey (context, ac, &keyblock);
 137         krb5_free_keyblock_contents (context, &keyblock);
 138     }
 139     if (krb5_ret_uint32 (sp, &ac->local_seqnumber))
 140         goto failure;
 141     if (krb5_ret_uint32 (sp, &ac->remote_seqnumber))
 142         goto failure;
 143
 144     if (krb5_ret_int32 (sp, &tmp) != 0)
 145         goto failure;
 146     ac->keytype = tmp;
 147     if (krb5_ret_int32 (sp, &tmp) != 0)
 148         goto failure;
 149     ac->cksumtype = tmp;
 150
 151     /* names */
 152
 153     if (krb5_ret_data (sp, &data))
 154         goto failure;
 155     buffer.value  = data.data;
 156     buffer.length = data.length;
 157
 158     ret = _gsskrb5_import_name (minor_status, &buffer, GSS_C_NT_EXPORT_NAME,
 159                                 &name);
 160     if (ret) {
 161         ret = _gsskrb5_import_name (minor_status, &buffer, GSS_C_NO_OID,
 162                                     &name);
 163         if (ret) {
 164             krb5_data_free (&data);
 165             goto failure;
 166         }
 167     }
 168     ctx->source = (krb5_principal)name;
 169     krb5_data_free (&data);
 170
 171     if (krb5_ret_data (sp, &data) != 0)
 172         goto failure;
 173     buffer.value  = data.data;
 174     buffer.length = data.length;
 175
 176     ret = _gsskrb5_import_name (minor_status, &buffer, GSS_C_NT_EXPORT_NAME,
 177                                 &name);
 178     if (ret) {
 179         ret = _gsskrb5_import_name (minor_status, &buffer, GSS_C_NO_OID,
 180                                     &name);
 181         if (ret) {
 182             krb5_data_free (&data);
 183             goto failure;
 184         }
 185     }
 186     ctx->target = (krb5_principal)name;
 187     krb5_data_free (&data);
 188
 189     if (krb5_ret_int32 (sp, &tmp))
 190         goto failure;
 191     ctx->flags = tmp;
 192     if (krb5_ret_int32 (sp, &tmp))
 193         goto failure;
 194     ctx->more_flags = tmp;
 195     if (krb5_ret_int32 (sp, &tmp))
 196         goto failure;
 197     ctx->lifetime = tmp;
 198
 199     ret = _gssapi_msg_order_import(minor_status, sp, &ctx->order);
 200     if (ret)
 201         goto failure;
 202
 203     krb5_storage_free (sp);
 204
 205     _gsskrb5i_is_cfx(context, ctx, (ctx->more_flags & LOCAL) == 0);
 206
 207     *context_handle = (gss_ctx_id_t)ctx;
 208
 209     return GSS_S_COMPLETE;
 210
 211 failure:
 212     krb5_auth_con_free (context,
 213                         ctx->auth_context);
 214     if (ctx->source != NULL)
 215         krb5_free_principal(context, ctx->source);
 216     if (ctx->target != NULL)
 217         krb5_free_principal(context, ctx->target);
 218     if (localp)
 219         krb5_free_address (context, localp);
 220     if (remotep)
 221         krb5_free_address (context, remotep);
 222     if(ctx->order)
 223         _gssapi_msg_order_destroy(&ctx->order);
 224     HEIMDAL_MUTEX_destroy(&ctx->ctx_id_mutex);
 225     krb5_storage_free (sp);
 226     free (ctx);
 227     *context_handle = GSS_C_NO_CONTEXT;
 228     return ret;
 229 }