crypto/external/bsd/heimdal/dist/lib/gssapi/krb5/creds.c

   1 /*      $NetBSD: creds.c,v 1.1.1.2 2014/04/24 12:45:29 pettai Exp $     */
   2
   3 /*
   4  * Copyright (c) 2009 Kungliga Tekniska Högskolan
   5  * (Royal Institute of Technology, Stockholm, Sweden).
   6  * All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  *
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions and the following disclaimer.
  14  *
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  *
  19  * 3. Neither the name of the Institute nor the names of its contributors
  20  *    may be used to endorse or promote products derived from this software
  21  *    without specific prior written permission.
  22  *
  23  * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
  24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
  27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  33  * SUCH DAMAGE.
  34  */
  35
  36 #include "gsskrb5_locl.h"
  37
  38 OM_uint32 GSSAPI_CALLCONV
  39 _gsskrb5_export_cred(OM_uint32 *minor_status,
  40                      gss_cred_id_t cred_handle,
  41                      gss_buffer_t cred_token)
  42 {
  43     gsskrb5_cred handle = (gsskrb5_cred)cred_handle;
  44     krb5_context context;
  45     krb5_error_code ret;
  46     krb5_storage *sp;
  47     krb5_data data, mech;
  48     const char *type;
  49     char *str;
  50
  51     GSSAPI_KRB5_INIT (&context);
  52
  53     if (handle->usage != GSS_C_INITIATE && handle->usage != GSS_C_BOTH) {
  54         *minor_status = GSS_KRB5_S_G_BAD_USAGE;
  55         return GSS_S_FAILURE;
  56     }
  57
  58     sp = krb5_storage_emem();
  59     if (sp == NULL) {
  60         *minor_status = ENOMEM;
  61         return GSS_S_FAILURE;
  62     }
  63
  64     type = krb5_cc_get_type(context, handle->ccache);
  65     if (strcmp(type, "MEMORY") == 0) {
  66         krb5_creds *creds;
  67         ret = krb5_store_uint32(sp, 0);
  68         if (ret) {
  69             krb5_storage_free(sp);
  70             *minor_status = ret;
  71             return GSS_S_FAILURE;
  72         }
  73
  74         ret = _krb5_get_krbtgt(context, handle->ccache,
  75                                handle->principal->realm,
  76                                &creds);
  77         if (ret) {
  78             krb5_storage_free(sp);
  79             *minor_status = ret;
  80             return GSS_S_FAILURE;
  81         }
  82
  83         ret = krb5_store_creds(sp, creds);
  84         krb5_free_creds(context, creds);
  85         if (ret) {
  86             krb5_storage_free(sp);
  87             *minor_status = ret;
  88             return GSS_S_FAILURE;
  89         }
  90
  91     } else {
  92         ret = krb5_store_uint32(sp, 1);
  93         if (ret) {
  94             krb5_storage_free(sp);
  95             *minor_status = ret;
  96             return GSS_S_FAILURE;
  97         }
  98
  99         ret = krb5_cc_get_full_name(context, handle->ccache, &str);
 100         if (ret) {
 101             krb5_storage_free(sp);
 102             *minor_status = ret;
 103             return GSS_S_FAILURE;
 104         }
 105
 106         ret = krb5_store_string(sp, str);
 107         free(str);
 108         if (ret) {
 109             krb5_storage_free(sp);
 110             *minor_status = ret;
 111             return GSS_S_FAILURE;
 112         }
 113     }
 114     ret = krb5_storage_to_data(sp, &data);
 115     krb5_storage_free(sp);
 116     if (ret) {
 117         *minor_status = ret;
 118         return GSS_S_FAILURE;
 119     }
 120     sp = krb5_storage_emem();
 121     if (sp == NULL) {
 122         krb5_data_free(&data);
 123         *minor_status = ENOMEM;
 124         return GSS_S_FAILURE;
 125     }
 126
 127     mech.data = GSS_KRB5_MECHANISM->elements;
 128     mech.length = GSS_KRB5_MECHANISM->length;
 129
 130     ret = krb5_store_data(sp, mech);
 131     if (ret) {
 132         krb5_data_free(&data);
 133         krb5_storage_free(sp);
 134         *minor_status = ret;
 135         return GSS_S_FAILURE;
 136     }
 137
 138     ret = krb5_store_data(sp, data);
 139     krb5_data_free(&data);
 140     if (ret) {
 141         krb5_storage_free(sp);
 142         *minor_status = ret;
 143         return GSS_S_FAILURE;
 144     }
 145
 146     ret = krb5_storage_to_data(sp, &data);
 147     krb5_storage_free(sp);
 148     if (ret) {
 149         *minor_status = ret;
 150         return GSS_S_FAILURE;
 151     }
 152
 153     cred_token->value = data.data;
 154     cred_token->length = data.length;
 155
 156     return GSS_S_COMPLETE;
 157 }
 158
 159 OM_uint32 GSSAPI_CALLCONV
 160 _gsskrb5_import_cred(OM_uint32 * minor_status,
 161                      gss_buffer_t cred_token,
 162                      gss_cred_id_t * cred_handle)
 163 {
 164     krb5_context context;
 165     krb5_error_code ret;
 166     gsskrb5_cred handle;
 167     krb5_ccache id;
 168     krb5_storage *sp;
 169     char *str;
 170     uint32_t type;
 171     int flags = 0;
 172
 173     *cred_handle = GSS_C_NO_CREDENTIAL;
 174
 175     GSSAPI_KRB5_INIT (&context);
 176
 177     sp = krb5_storage_from_mem(cred_token->value, cred_token->length);
 178     if (sp == NULL) {
 179         *minor_status = ENOMEM;
 180         return GSS_S_FAILURE;
 181     }
 182
 183     ret = krb5_ret_uint32(sp, &type);
 184     if (ret) {
 185         krb5_storage_free(sp);
 186         *minor_status = ret;
 187         return GSS_S_FAILURE;
 188     }
 189     switch (type) {
 190     case 0: {
 191         krb5_creds creds;
 192
 193         ret = krb5_ret_creds(sp, &creds);
 194         krb5_storage_free(sp);
 195         if (ret) {
 196             *minor_status = ret;
 197             return GSS_S_FAILURE;
 198         }
 199
 200         ret = krb5_cc_new_unique(context, "MEMORY", NULL, &id);
 201         if (ret) {
 202             *minor_status = ret;
 203             return GSS_S_FAILURE;
 204         }
 205
 206         ret = krb5_cc_initialize(context, id, creds.client);
 207         if (ret) {
 208             krb5_cc_destroy(context, id);
 209             *minor_status = ret;
 210             return GSS_S_FAILURE;
 211         }
 212
 213         ret = krb5_cc_store_cred(context, id, &creds);
 214         krb5_free_cred_contents(context, &creds);
 215
 216         flags |= GSS_CF_DESTROY_CRED_ON_RELEASE;
 217
 218         break;
 219     }
 220     case 1:
 221         ret = krb5_ret_string(sp, &str);
 222         krb5_storage_free(sp);
 223         if (ret) {
 224             *minor_status = ret;
 225             return GSS_S_FAILURE;
 226         }
 227
 228         ret = krb5_cc_resolve(context, str, &id);
 229         krb5_xfree(str);
 230         if (ret) {
 231             *minor_status = ret;
 232             return GSS_S_FAILURE;
 233         }
 234         break;
 235
 236     default:
 237         krb5_storage_free(sp);
 238         *minor_status = 0;
 239         return GSS_S_NO_CRED;
 240     }
 241
 242     handle = calloc(1, sizeof(*handle));
 243     if (handle == NULL) {
 244         krb5_cc_close(context, id);
 245         *minor_status = ENOMEM;
 246         return GSS_S_FAILURE;
 247     }
 248
 249     handle->usage = GSS_C_INITIATE;
 250     krb5_cc_get_principal(context, id, &handle->principal);
 251     handle->ccache = id;
 252     handle->cred_flags = flags;
 253
 254     *cred_handle = (gss_cred_id_t)handle;
 255
 256     return GSS_S_COMPLETE;
 257 }