lib/gssapi/krb5/acquire_cred.c

   1 /*
   2  * Copyright (c) 1997 - 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 gss_acquire_cred
  39            (OM_uint32 * minor_status,
  40             const gss_name_t desired_name,
  41             OM_uint32 time_req,
  42             const gss_OID_set desired_mechs,
  43             gss_cred_usage_t cred_usage,
  44             gss_cred_id_t * output_cred_handle,
  45             gss_OID_set * actual_mechs,
  46             OM_uint32 * time_rec
  47            )
  48 {
  49     gss_cred_id_t handle;
  50     OM_uint32 ret;
  51     krb5_error_code kret = 0;
  52     krb5_ccache ccache;
  53
  54     handle = (gss_cred_id_t)malloc(sizeof(*handle));
  55     if (handle == GSS_C_NO_CREDENTIAL)
  56         return GSS_S_FAILURE;
  57
  58     memset(handle, 0, sizeof (*handle));
  59
  60     ret = gss_duplicate_name(minor_status, desired_name, &handle->principal);
  61     if (ret) {
  62         free(handle);
  63         return ret;
  64     }
  65
  66     if (krb5_cc_default(gssapi_krb5_context, &ccache) == 0) {
  67         krb5_principal def_princ;
  68
  69         if (krb5_cc_get_principal(gssapi_krb5_context, ccache,
  70                                   &def_princ) != 0) {
  71             krb5_cc_close(gssapi_krb5_context, ccache);
  72             goto try_keytab;
  73         }
  74         if (krb5_principal_compare(gssapi_krb5_context, handle->principal,
  75                                    def_princ) == FALSE) {
  76             krb5_free_principal(gssapi_krb5_context, def_princ);
  77             krb5_cc_close(gssapi_krb5_context, ccache);
  78             goto try_keytab;
  79         }
  80         handle->ccache = ccache;
  81         handle->keytab = NULL;
  82         krb5_free_principal(gssapi_krb5_context, def_princ);
  83     } else {
  84         krb5_creds cred;
  85         krb5_get_init_creds_opt opt;
  86
  87  try_keytab:
  88         kret = krb5_kt_default(gssapi_krb5_context, &handle->keytab);
  89         if (kret != 0)
  90             goto krb5_bad;
  91
  92         krb5_get_init_creds_opt_init(&opt);
  93         memset(&cred, 0, sizeof(cred));
  94
  95         kret = krb5_get_init_creds_keytab(gssapi_krb5_context, &cred,
  96                                           handle->principal, handle->keytab,
  97                                           0, NULL, &opt);
  98         if (kret != 0)
  99             goto krb5_bad;
 100
 101         kret = krb5_cc_gen_new(gssapi_krb5_context, &krb5_mcc_ops,
 102                                &handle->ccache);
 103         if (kret != 0) {
 104             krb5_free_creds_contents(gssapi_krb5_context, &cred);
 105             goto krb5_bad;
 106         }
 107
 108         kret = krb5_cc_initialize(gssapi_krb5_context, handle->ccache,
 109                                   cred.client);
 110         if (kret != 0) {
 111             krb5_free_creds_contents(gssapi_krb5_context, &cred);
 112             goto krb5_bad;
 113         }
 114
 115         kret = krb5_cc_store_cred(gssapi_krb5_context, handle->ccache, &cred);
 116         if (kret != 0) {
 117             krb5_free_creds_contents(gssapi_krb5_context, &cred);
 118             goto krb5_bad;
 119         }
 120
 121         krb5_free_creds_contents(gssapi_krb5_context, &cred);
 122     }
 123
 124     /* XXX */
 125     handle->lifetime = time_req;
 126     handle->usage = cred_usage;
 127
 128     ret = gss_create_empty_oid_set(minor_status, &handle->mechanisms);
 129     if (ret)
 130         goto gssapi_bad;
 131
 132     ret = gss_add_oid_set_member(minor_status, GSS_KRB5_MECHANISM,
 133                                  &handle->mechanisms);
 134     if (ret)
 135         goto gssapi_bad;
 136
 137     ret = gss_inquire_cred(minor_status, handle, NULL, time_rec, NULL,
 138                            actual_mechs);
 139     if (ret)
 140         goto gssapi_bad;
 141
 142     *output_cred_handle = handle;
 143     return (GSS_S_COMPLETE);
 144
 145  krb5_bad:
 146     ret = GSS_S_FAILURE;
 147     *minor_status = kret;
 148     gssapi_krb5_set_error_string ();
 149
 150  gssapi_bad:
 151     krb5_free_principal(gssapi_krb5_context, handle->principal);
 152     if (handle->ccache != NULL)
 153         krb5_cc_close(gssapi_krb5_context, handle->ccache);
 154     if (handle->keytab != NULL)
 155         krb5_kt_close(gssapi_krb5_context, handle->keytab);
 156     if (handle->mechanisms != NULL)
 157         gss_release_oid_set(NULL, &handle->mechanisms);
 158
 159     free(handle);
 160
 161     return (ret);
 162 }