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