source/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,v 1.12 2006/10/07 22:15:06 lha Exp $");
  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     gss_cred_id_t aqcred_init = GSS_C_NO_CREDENTIAL;
  48     gss_cred_id_t aqcred_accept = GSS_C_NO_CREDENTIAL;
  49     gsskrb5_cred acred = NULL, icred = NULL;
  50     OM_uint32 ret;
  51
  52     *minor_status = 0;
  53
  54     if (output_name)
  55         *output_name = NULL;
  56     if (mechanisms)
  57         *mechanisms = GSS_C_NO_OID_SET;
  58
  59     if (cred_handle == GSS_C_NO_CREDENTIAL) {
  60         ret = _gsskrb5_acquire_cred(minor_status,
  61                                     GSS_C_NO_NAME,
  62                                     GSS_C_INDEFINITE,
  63                                     GSS_C_NO_OID_SET,
  64                                     GSS_C_ACCEPT,
  65                                     &aqcred_accept,
  66                                     NULL,
  67                                     NULL);
  68         if (ret == GSS_S_COMPLETE)
  69             acred = (gsskrb5_cred)aqcred_accept;
  70
  71         ret = _gsskrb5_acquire_cred(minor_status,
  72                                     GSS_C_NO_NAME,
  73                                     GSS_C_INDEFINITE,
  74                                     GSS_C_NO_OID_SET,
  75                                     GSS_C_INITIATE,
  76                                     &aqcred_init,
  77                                     NULL,
  78                                     NULL);
  79         if (ret == GSS_S_COMPLETE)
  80             acred = (gsskrb5_cred)aqcred_init;
  81
  82         if (icred == NULL && acred == NULL) {
  83             *minor_status = 0;
  84             return GSS_S_NO_CRED;
  85         }
  86     } else
  87         acred = (gsskrb5_cred)cred_handle;
  88
  89     if (acred)
  90         HEIMDAL_MUTEX_lock(&acred->cred_id_mutex);
  91     if (icred)
  92         HEIMDAL_MUTEX_lock(&icred->cred_id_mutex);
  93
  94     if (output_name != NULL) {
  95         if (icred && icred->principal != NULL) {
  96             gss_name_t name;
  97
  98             if (acred)
  99                 name = (gss_name_t)acred->principal;
 100             else
 101                 name = (gss_name_t)icred->principal;
 102
 103             ret = _gsskrb5_duplicate_name(minor_status, name, output_name);
 104             if (ret)
 105                 goto out;
 106         } else if (acred && acred->usage == GSS_C_ACCEPT) {
 107             krb5_principal princ;
 108             *minor_status = krb5_sname_to_principal(_gsskrb5_context, NULL,
 109                                                     NULL, KRB5_NT_SRV_HST,
 110                                                     &princ);
 111             if (*minor_status) {
 112                 ret = GSS_S_FAILURE;
 113                 goto out;
 114             }
 115             *output_name = (gss_name_t)princ;
 116         } else {
 117             krb5_principal princ;
 118             *minor_status = krb5_get_default_principal(_gsskrb5_context,
 119                                                        &princ);
 120             if (*minor_status) {
 121                 ret = GSS_S_FAILURE;
 122                 goto out;
 123             }
 124             *output_name = (gss_name_t)princ;
 125         }
 126     }
 127     if (lifetime != NULL) {
 128         OM_uint32 alife = GSS_C_INDEFINITE, ilife = GSS_C_INDEFINITE;
 129
 130         if (acred) alife = acred->lifetime;
 131         if (icred) ilife = icred->lifetime;
 132
 133         ret = _gsskrb5_lifetime_left(minor_status,
 134                                      min(alife,ilife),
 135                                      lifetime);
 136         if (ret)
 137             goto out;
 138     }
 139     if (cred_usage != NULL) {
 140         if (acred && icred)
 141             *cred_usage = GSS_C_BOTH;
 142         else if (acred)
 143             *cred_usage = GSS_C_ACCEPT;
 144         else if (icred)
 145             *cred_usage = GSS_C_INITIATE;
 146         else
 147             abort();
 148     }
 149
 150     if (mechanisms != NULL) {
 151         ret = _gsskrb5_create_empty_oid_set(minor_status, mechanisms);
 152         if (ret)
 153             goto out;
 154         if (acred)
 155             ret = _gsskrb5_add_oid_set_member(minor_status,
 156                                               &acred->mechanisms->elements[0],
 157                                               mechanisms);
 158         if (ret == GSS_S_COMPLETE && icred)
 159             ret = _gsskrb5_add_oid_set_member(minor_status,
 160                                               &icred->mechanisms->elements[0],
 161                                               mechanisms);
 162         if (ret)
 163             goto out;
 164     }
 165     ret = GSS_S_COMPLETE;
 166 out:
 167     if (acred)
 168         HEIMDAL_MUTEX_unlock(&acred->cred_id_mutex);
 169     if (icred)
 170         HEIMDAL_MUTEX_unlock(&icred->cred_id_mutex);
 171
 172     if (aqcred_init != GSS_C_NO_CREDENTIAL)
 173         ret = _gsskrb5_release_cred(minor_status, &aqcred_init);
 174     if (aqcred_accept != GSS_C_NO_CREDENTIAL)
 175         ret = _gsskrb5_release_cred(minor_status, &aqcred_accept);
 176
 177     return ret;
 178 }