source4/heimdal/lib/gssapi/mech/gss_inquire_cred.c

   1 /*-
   2  * Copyright (c) 2005 Doug Rabson
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  *
  14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  24  * SUCH DAMAGE.
  25  *
  26  *      $FreeBSD: src/lib/libgssapi/gss_inquire_cred.c,v 1.1 2005/12/29 14:40:20 dfr Exp $
  27  */
  28
  29 #include "mech_locl.h"
  30 RCSID("$Id: gss_inquire_cred.c 23025 2008-04-17 10:01:57Z lha $");
  31
  32 #define AUSAGE 1
  33 #define IUSAGE 2
  34
  35 static void
  36 updateusage(gss_cred_usage_t usage, int *usagemask)
  37 {
  38     if (usage == GSS_C_BOTH)
  39         *usagemask |= AUSAGE | IUSAGE;
  40     else if (usage == GSS_C_ACCEPT)
  41         *usagemask |= AUSAGE;
  42     else if (usage == GSS_C_INITIATE)
  43         *usagemask |= IUSAGE;
  44 }
  45
  46 OM_uint32 GSSAPI_LIB_FUNCTION
  47 gss_inquire_cred(OM_uint32 *minor_status,
  48     const gss_cred_id_t cred_handle,
  49     gss_name_t *name_ret,
  50     OM_uint32 *lifetime,
  51     gss_cred_usage_t *cred_usage,
  52     gss_OID_set *mechanisms)
  53 {
  54         OM_uint32 major_status;
  55         struct _gss_mech_switch *m;
  56         struct _gss_cred *cred = (struct _gss_cred *) cred_handle;
  57         struct _gss_name *name;
  58         struct _gss_mechanism_name *mn;
  59         OM_uint32 min_lifetime;
  60         int found = 0;
  61         int usagemask = 0;
  62         gss_cred_usage_t usage;
  63
  64         _gss_load_mech();
  65
  66         *minor_status = 0;
  67         if (name_ret)
  68                 *name_ret = GSS_C_NO_NAME;
  69         if (lifetime)
  70                 *lifetime = 0;
  71         if (cred_usage)
  72                 *cred_usage = 0;
  73         if (mechanisms)
  74                 *mechanisms = GSS_C_NO_OID_SET;
  75
  76         if (name_ret) {
  77                 name = calloc(1, sizeof(*name));
  78                 if (name == NULL) {
  79                         *minor_status = ENOMEM;
  80                         return (GSS_S_FAILURE);
  81                 }
  82                 SLIST_INIT(&name->gn_mn);
  83         } else {
  84                 name = NULL;
  85         }
  86
  87         if (mechanisms) {
  88                 major_status = gss_create_empty_oid_set(minor_status,
  89                     mechanisms);
  90                 if (major_status) {
  91                         if (name) free(name);
  92                         return (major_status);
  93                 }
  94         }
  95
  96         min_lifetime = GSS_C_INDEFINITE;
  97         if (cred) {
  98                 struct _gss_mechanism_cred *mc;
  99
 100                 SLIST_FOREACH(mc, &cred->gc_mc, gmc_link) {
 101                         gss_name_t mc_name;
 102                         OM_uint32 mc_lifetime;
 103
 104                         major_status = mc->gmc_mech->gm_inquire_cred(minor_status,
 105                             mc->gmc_cred, &mc_name, &mc_lifetime, &usage, NULL);
 106                         if (major_status)
 107                                 continue;
 108
 109                         updateusage(usage, &usagemask);
 110                         if (name) {
 111                                 mn = malloc(sizeof(struct _gss_mechanism_name));
 112                                 if (!mn) {
 113                                         mc->gmc_mech->gm_release_name(minor_status,
 114                                             &mc_name);
 115                                         continue;
 116                                 }
 117                                 mn->gmn_mech = mc->gmc_mech;
 118                                 mn->gmn_mech_oid = mc->gmc_mech_oid;
 119                                 mn->gmn_name = mc_name;
 120                                 SLIST_INSERT_HEAD(&name->gn_mn, mn, gmn_link);
 121                         } else {
 122                                 mc->gmc_mech->gm_release_name(minor_status,
 123                                     &mc_name);
 124                         }
 125
 126                         if (mc_lifetime < min_lifetime)
 127                                 min_lifetime = mc_lifetime;
 128
 129                         if (mechanisms)
 130                                 gss_add_oid_set_member(minor_status,
 131                                     mc->gmc_mech_oid, mechanisms);
 132                         found++;
 133                 }
 134         } else {
 135                 SLIST_FOREACH(m, &_gss_mechs, gm_link) {
 136                         gss_name_t mc_name;
 137                         OM_uint32 mc_lifetime;
 138
 139                         major_status = m->gm_mech.gm_inquire_cred(minor_status,
 140                             GSS_C_NO_CREDENTIAL, &mc_name, &mc_lifetime,
 141                             &usage, NULL);
 142                         if (major_status)
 143                                 continue;
 144
 145                         updateusage(usage, &usagemask);
 146                         if (name && mc_name) {
 147                                 mn = malloc(
 148                                         sizeof(struct _gss_mechanism_name));
 149                                 if (!mn) {
 150                                         m->gm_mech.gm_release_name(
 151                                                 minor_status, &mc_name);
 152                                         continue;
 153                                 }
 154                                 mn->gmn_mech = &m->gm_mech;
 155                                 mn->gmn_mech_oid = &m->gm_mech_oid;
 156                                 mn->gmn_name = mc_name;
 157                                 SLIST_INSERT_HEAD(&name->gn_mn, mn, gmn_link);
 158                         } else if (mc_name) {
 159                                 m->gm_mech.gm_release_name(minor_status,
 160                                     &mc_name);
 161                         }
 162
 163                         if (mc_lifetime < min_lifetime)
 164                                 min_lifetime = mc_lifetime;
 165
 166                         if (mechanisms)
 167                                 gss_add_oid_set_member(minor_status,
 168                                     &m->gm_mech_oid, mechanisms);
 169                         found++;
 170                 }
 171         }
 172
 173         if (found == 0) {
 174                 gss_name_t n = (gss_name_t)name;
 175                 if (n)
 176                         gss_release_name(minor_status, &n);
 177                 gss_release_oid_set(minor_status, mechanisms);
 178                 *minor_status = 0;
 179                 return (GSS_S_NO_CRED);
 180         }
 181
 182         *minor_status = 0;
 183         if (name_ret)
 184                 *name_ret = (gss_name_t) name;
 185         if (lifetime)
 186                 *lifetime = min_lifetime;
 187         if (cred_usage) {
 188                 if ((usagemask & (AUSAGE|IUSAGE)) == (AUSAGE|IUSAGE))
 189                         *cred_usage = GSS_C_BOTH;
 190                 else if (usagemask & IUSAGE)
 191                         *cred_usage = GSS_C_INITIATE;
 192                 else if (usagemask & AUSAGE)
 193                         *cred_usage = GSS_C_ACCEPT;
 194         }
 195         return (GSS_S_COMPLETE);
 196 }