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

   1 /*      $NetBSD: add_cred.c,v 1.1.1.2 2014/04/24 12:45:29 pettai Exp $  */
   2
   3 /*
   4  * Copyright (c) 2003 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 _gsskrb5_add_cred (
  39      OM_uint32           *minor_status,
  40      const gss_cred_id_t input_cred_handle,
  41      const gss_name_t    desired_name,
  42      const gss_OID       desired_mech,
  43      gss_cred_usage_t    cred_usage,
  44      OM_uint32           initiator_time_req,
  45      OM_uint32           acceptor_time_req,
  46      gss_cred_id_t       *output_cred_handle,
  47      gss_OID_set         *actual_mechs,
  48      OM_uint32           *initiator_time_rec,
  49      OM_uint32           *acceptor_time_rec)
  50 {
  51     krb5_context context;
  52     OM_uint32 ret, lifetime;
  53     gsskrb5_cred cred, handle;
  54     krb5_const_principal dname;
  55
  56     handle = NULL;
  57     cred = (gsskrb5_cred)input_cred_handle;
  58     dname = (krb5_const_principal)desired_name;
  59
  60     GSSAPI_KRB5_INIT (&context);
  61
  62     if (gss_oid_equal(desired_mech, GSS_KRB5_MECHANISM) == 0) {
  63         *minor_status = 0;
  64         return GSS_S_BAD_MECH;
  65     }
  66
  67     if (cred == NULL && output_cred_handle == NULL) {
  68         *minor_status = 0;
  69         return GSS_S_NO_CRED;
  70     }
  71
  72     if (cred == NULL) { /* XXX standard conformance failure */
  73         *minor_status = 0;
  74         return GSS_S_NO_CRED;
  75     }
  76
  77     /* check if requested output usage is compatible with output usage */
  78     if (output_cred_handle != NULL) {
  79         HEIMDAL_MUTEX_lock(&cred->cred_id_mutex);
  80         if (cred->usage != cred_usage && cred->usage != GSS_C_BOTH) {
  81             HEIMDAL_MUTEX_unlock(&cred->cred_id_mutex);
  82             *minor_status = GSS_KRB5_S_G_BAD_USAGE;
  83             return(GSS_S_FAILURE);
  84         }
  85     }
  86
  87     /* check that we have the same name */
  88     if (dname != NULL &&
  89         krb5_principal_compare(context, dname,
  90                                cred->principal) != FALSE) {
  91         if (output_cred_handle)
  92             HEIMDAL_MUTEX_unlock(&cred->cred_id_mutex);
  93         *minor_status = 0;
  94         return GSS_S_BAD_NAME;
  95     }
  96
  97     /* make a copy */
  98     if (output_cred_handle) {
  99         krb5_error_code kret;
 100
 101         handle = calloc(1, sizeof(*handle));
 102         if (handle == NULL) {
 103             HEIMDAL_MUTEX_unlock(&cred->cred_id_mutex);
 104             *minor_status = ENOMEM;
 105             return (GSS_S_FAILURE);
 106         }
 107
 108         handle->usage = cred_usage;
 109         handle->lifetime = cred->lifetime;
 110         handle->principal = NULL;
 111         handle->keytab = NULL;
 112         handle->ccache = NULL;
 113         handle->mechanisms = NULL;
 114         HEIMDAL_MUTEX_init(&handle->cred_id_mutex);
 115
 116         ret = GSS_S_FAILURE;
 117
 118         kret = krb5_copy_principal(context, cred->principal,
 119                                   &handle->principal);
 120         if (kret) {
 121             HEIMDAL_MUTEX_unlock(&cred->cred_id_mutex);
 122             free(handle);
 123             *minor_status = kret;
 124             return GSS_S_FAILURE;
 125         }
 126
 127         if (cred->keytab) {
 128             char *name = NULL;
 129
 130             ret = GSS_S_FAILURE;
 131
 132             kret = krb5_kt_get_full_name(context, cred->keytab, &name);
 133             if (kret) {
 134                 *minor_status = kret;
 135                 goto failure;
 136             }
 137
 138             kret = krb5_kt_resolve(context, name,
 139                                    &handle->keytab);
 140             krb5_xfree(name);
 141             if (kret){
 142                 *minor_status = kret;
 143                 goto failure;
 144             }
 145         }
 146
 147         if (cred->ccache) {
 148             const char *type, *name;
 149             char *type_name = NULL;
 150
 151             ret = GSS_S_FAILURE;
 152
 153             type = krb5_cc_get_type(context, cred->ccache);
 154             if (type == NULL){
 155                 *minor_status = ENOMEM;
 156                 goto failure;
 157             }
 158
 159             if (strcmp(type, "MEMORY") == 0) {
 160                 ret = krb5_cc_new_unique(context, type,
 161                                          NULL, &handle->ccache);
 162                 if (ret) {
 163                     *minor_status = ret;
 164                     goto failure;
 165                 }
 166
 167                 ret = krb5_cc_copy_cache(context, cred->ccache,
 168                                          handle->ccache);
 169                 if (ret) {
 170                     *minor_status = ret;
 171                     goto failure;
 172                 }
 173
 174             } else {
 175                 name = krb5_cc_get_name(context, cred->ccache);
 176                 if (name == NULL) {
 177                     *minor_status = ENOMEM;
 178                     goto failure;
 179                 }
 180
 181                 kret = asprintf(&type_name, "%s:%s", type, name);
 182                 if (kret < 0 || type_name == NULL) {
 183                     *minor_status = ENOMEM;
 184                     goto failure;
 185                 }
 186
 187                 kret = krb5_cc_resolve(context, type_name,
 188                                        &handle->ccache);
 189                 free(type_name);
 190                 if (kret) {
 191                     *minor_status = kret;
 192                     goto failure;
 193                 }
 194             }
 195         }
 196         ret = gss_create_empty_oid_set(minor_status, &handle->mechanisms);
 197         if (ret)
 198             goto failure;
 199
 200         ret = gss_add_oid_set_member(minor_status, GSS_KRB5_MECHANISM,
 201                                      &handle->mechanisms);
 202         if (ret)
 203             goto failure;
 204     }
 205
 206     HEIMDAL_MUTEX_unlock(&cred->cred_id_mutex);
 207
 208     ret = _gsskrb5_inquire_cred(minor_status, (gss_cred_id_t)cred,
 209                                 NULL, &lifetime, NULL, actual_mechs);
 210     if (ret)
 211         goto failure;
 212
 213     if (initiator_time_rec)
 214         *initiator_time_rec = lifetime;
 215     if (acceptor_time_rec)
 216         *acceptor_time_rec = lifetime;
 217
 218     if (output_cred_handle) {
 219         *output_cred_handle = (gss_cred_id_t)handle;
 220     }
 221
 222     *minor_status = 0;
 223     return ret;
 224
 225  failure:
 226
 227     if (handle) {
 228         if (handle->principal)
 229             krb5_free_principal(context, handle->principal);
 230         if (handle->keytab)
 231             krb5_kt_close(context, handle->keytab);
 232         if (handle->ccache)
 233             krb5_cc_destroy(context, handle->ccache);
 234         if (handle->mechanisms)
 235             gss_release_oid_set(NULL, &handle->mechanisms);
 236         free(handle);
 237     }
 238     if (output_cred_handle)
 239         HEIMDAL_MUTEX_unlock(&cred->cred_id_mutex);
 240     return ret;
 241 }