crypto/heimdal/lib/gssapi/krb5/inquire_cred.c

   1 /*
   2  * Copyright (c) 1997, 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 "krb5/gsskrb5_locl.h"
  35
  36 RCSID("$Id: inquire_cred.c 20688 2007-05-17 18:44:31Z lha $");
  37
  38 OM_uint32 _gsskrb5_inquire_cred
  39 (OM_uint32 * minor_status,
  40  const gss_cred_id_t cred_handle,
  41  gss_name_t * output_name,
  42  OM_uint32 * lifetime,
  43  gss_cred_usage_t * cred_usage,
  44  gss_OID_set * mechanisms
  45     )
  46 {
  47     krb5_context context;
  48     gss_cred_id_t aqcred_init = GSS_C_NO_CREDENTIAL;
  49     gss_cred_id_t aqcred_accept = GSS_C_NO_CREDENTIAL;
  50     gsskrb5_cred acred = NULL, icred = NULL;
  51     OM_uint32 ret;
  52
  53     *minor_status = 0;
  54
  55     if (output_name)
  56         *output_name = NULL;
  57     if (mechanisms)
  58         *mechanisms = GSS_C_NO_OID_SET;
  59
  60     GSSAPI_KRB5_INIT (&context);
  61
  62     if (cred_handle == GSS_C_NO_CREDENTIAL) {
  63         ret = _gsskrb5_acquire_cred(minor_status,
  64                                     GSS_C_NO_NAME,
  65                                     GSS_C_INDEFINITE,
  66                                     GSS_C_NO_OID_SET,
  67                                     GSS_C_ACCEPT,
  68                                     &aqcred_accept,
  69                                     NULL,
  70                                     NULL);
  71         if (ret == GSS_S_COMPLETE)
  72             acred = (gsskrb5_cred)aqcred_accept;
  73
  74         ret = _gsskrb5_acquire_cred(minor_status,
  75                                     GSS_C_NO_NAME,
  76                                     GSS_C_INDEFINITE,
  77                                     GSS_C_NO_OID_SET,
  78                                     GSS_C_INITIATE,
  79                                     &aqcred_init,
  80                                     NULL,
  81                                     NULL);
  82         if (ret == GSS_S_COMPLETE)
  83             icred = (gsskrb5_cred)aqcred_init;
  84
  85         if (icred == NULL && acred == NULL) {
  86             *minor_status = 0;
  87             return GSS_S_NO_CRED;
  88         }
  89     } else
  90         acred = (gsskrb5_cred)cred_handle;
  91
  92     if (acred)
  93         HEIMDAL_MUTEX_lock(&acred->cred_id_mutex);
  94     if (icred)
  95         HEIMDAL_MUTEX_lock(&icred->cred_id_mutex);
  96
  97     if (output_name != NULL) {
  98         if (icred && icred->principal != NULL) {
  99             gss_name_t name;
 100
 101             if (acred && acred->principal)
 102                 name = (gss_name_t)acred->principal;
 103             else
 104                 name = (gss_name_t)icred->principal;
 105
 106             ret = _gsskrb5_duplicate_name(minor_status, name, output_name);
 107             if (ret)
 108                 goto out;
 109         } else if (acred && acred->usage == GSS_C_ACCEPT) {
 110             krb5_principal princ;
 111             *minor_status = krb5_sname_to_principal(context, NULL,
 112                                                     NULL, KRB5_NT_SRV_HST,
 113                                                     &princ);
 114             if (*minor_status) {
 115                 ret = GSS_S_FAILURE;
 116                 goto out;
 117             }
 118             *output_name = (gss_name_t)princ;
 119         } else {
 120             krb5_principal princ;
 121             *minor_status = krb5_get_default_principal(context,
 122                                                        &princ);
 123             if (*minor_status) {
 124                 ret = GSS_S_FAILURE;
 125                 goto out;
 126             }
 127             *output_name = (gss_name_t)princ;
 128         }
 129     }
 130     if (lifetime != NULL) {
 131         OM_uint32 alife = GSS_C_INDEFINITE, ilife = GSS_C_INDEFINITE;
 132
 133         if (acred) alife = acred->lifetime;
 134         if (icred) ilife = icred->lifetime;
 135
 136         ret = _gsskrb5_lifetime_left(minor_status,
 137                                      context,
 138                                      min(alife,ilife),
 139                                      lifetime);
 140         if (ret)
 141             goto out;
 142     }
 143     if (cred_usage != NULL) {
 144         if (acred && icred)
 145             *cred_usage = GSS_C_BOTH;
 146         else if (acred)
 147             *cred_usage = GSS_C_ACCEPT;
 148         else if (icred)
 149             *cred_usage = GSS_C_INITIATE;
 150         else
 151             abort();
 152     }
 153
 154     if (mechanisms != NULL) {
 155         ret = gss_create_empty_oid_set(minor_status, mechanisms);
 156         if (ret)
 157             goto out;
 158         if (acred)
 159             ret = gss_add_oid_set_member(minor_status,
 160                                          &acred->mechanisms->elements[0],
 161                                          mechanisms);
 162         if (ret == GSS_S_COMPLETE && icred)
 163             ret = gss_add_oid_set_member(minor_status,
 164                                          &icred->mechanisms->elements[0],
 165                                          mechanisms);
 166         if (ret)
 167             goto out;
 168     }
 169     ret = GSS_S_COMPLETE;
 170 out:
 171     if (acred)
 172         HEIMDAL_MUTEX_unlock(&acred->cred_id_mutex);
 173     if (icred)
 174         HEIMDAL_MUTEX_unlock(&icred->cred_id_mutex);
 175
 176     if (aqcred_init != GSS_C_NO_CREDENTIAL)
 177         ret = _gsskrb5_release_cred(minor_status, &aqcred_init);
 178     if (aqcred_accept != GSS_C_NO_CREDENTIAL)
 179         ret = _gsskrb5_release_cred(minor_status, &aqcred_accept);
 180
 181     return ret;
 182 }