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
  31 #define AUSAGE 1
  32 #define IUSAGE 2
  33
  34 static void
  35 updateusage(gss_cred_usage_t usage, int *usagemask)
  36 {
  37     if (usage == GSS_C_BOTH)
  38         *usagemask |= AUSAGE | IUSAGE;
  39     else if (usage == GSS_C_ACCEPT)
  40         *usagemask |= AUSAGE;
  41     else if (usage == GSS_C_INITIATE)
  42         *usagemask |= IUSAGE;
  43 }
  44
  45 GSSAPI_LIB_FUNCTION OM_uint32 GSSAPI_LIB_CALL
  46 gss_inquire_cred(OM_uint32 *minor_status,
  47     gss_const_cred_id_t cred_handle,
  48     gss_name_t *name_ret,
  49     OM_uint32 *lifetime,
  50     gss_cred_usage_t *cred_usage,
  51     gss_OID_set *mechanisms)
  52 {
  53         OM_uint32 major_status;
  54         struct _gss_mech_switch *m;
  55         struct _gss_cred *cred = (struct _gss_cred *) cred_handle;
  56         struct _gss_name *name;
  57         struct _gss_mechanism_name *mn;
  58         OM_uint32 min_lifetime;
  59         int found = FALSE;
  60         int usagemask = 0;
  61         gss_cred_usage_t usage;
  62
  63         _gss_load_mech();
  64
  65         *minor_status = 0;
  66         if (name_ret)
  67                 *name_ret = GSS_C_NO_NAME;
  68         if (lifetime)
  69                 *lifetime = 0;
  70         if (cred_usage)
  71                 *cred_usage = 0;
  72         if (mechanisms)
  73                 *mechanisms = GSS_C_NO_OID_SET;
  74
  75         if (name_ret) {
  76                 name = _gss_create_name(NULL, NULL);
  77                 if (name == NULL) {
  78                         *minor_status = ENOMEM;
  79                         return (GSS_S_FAILURE);
  80                 }
  81         } else {
  82                 name = NULL;
  83         }
  84
  85         if (mechanisms) {
  86                 major_status = gss_create_empty_oid_set(minor_status,
  87                     mechanisms);
  88                 if (major_status) {
  89                         if (name) free(name);
  90                         return (major_status);
  91                 }
  92         }
  93
  94         min_lifetime = GSS_C_INDEFINITE;
  95         if (cred) {
  96                 struct _gss_mechanism_cred *mc;
  97
  98                 HEIM_TAILQ_FOREACH(mc, &cred->gc_mc, gmc_link) {
  99                         gss_name_t mc_name = GSS_C_NO_NAME;
 100                         OM_uint32 mc_lifetime = GSS_C_INDEFINITE;
 101
 102                         heim_assert((mc->gmc_mech->gm_flags & GM_USE_MG_CRED) == 0,
 103                                     "should not have mech creds for GM_USE_MG_CRED mechs");
 104
 105                         if (mc->gmc_mech->gm_inquire_cred == NULL)
 106                                 continue;
 107
 108                         major_status = mc->gmc_mech->gm_inquire_cred(minor_status,
 109                             mc->gmc_cred, &mc_name, &mc_lifetime, &usage, NULL);
 110                         if (major_status)
 111                                 continue;
 112
 113                         updateusage(usage, &usagemask);
 114                         if (name) {
 115                                 mn = malloc(sizeof(struct _gss_mechanism_name));
 116                                 if (!mn) {
 117                                         mc->gmc_mech->gm_release_name(minor_status,
 118                                             &mc_name);
 119                                         continue;
 120                                 }
 121                                 mn->gmn_mech = mc->gmc_mech;
 122                                 mn->gmn_mech_oid = mc->gmc_mech_oid;
 123                                 mn->gmn_name = mc_name;
 124                                 HEIM_TAILQ_INSERT_TAIL(&name->gn_mn, mn, gmn_link);
 125                         } else {
 126                                 mc->gmc_mech->gm_release_name(minor_status,
 127                                     &mc_name);
 128                         }
 129
 130                         if (mc_lifetime < min_lifetime)
 131                                 min_lifetime = mc_lifetime;
 132
 133                         if (mechanisms)
 134                                 gss_add_oid_set_member(minor_status,
 135                                     mc->gmc_mech_oid, mechanisms);
 136                         found = TRUE;
 137                 }
 138         } else {
 139                 HEIM_TAILQ_FOREACH(m, &_gss_mechs, gm_link) {
 140                         gss_name_t mc_name;
 141                         OM_uint32 mc_lifetime;
 142
 143                         if (m->gm_mech.gm_inquire_cred == NULL ||
 144                             (m->gm_mech.gm_flags & GM_USE_MG_CRED))
 145                                 continue;
 146
 147                         major_status = m->gm_mech.gm_inquire_cred(minor_status,
 148                             GSS_C_NO_CREDENTIAL, &mc_name, &mc_lifetime,
 149                             &usage, NULL);
 150                         if (major_status)
 151                                 continue;
 152
 153                         updateusage(usage, &usagemask);
 154                         if (name && mc_name) {
 155                                 mn = malloc(
 156                                         sizeof(struct _gss_mechanism_name));
 157                                 if (!mn) {
 158                                         m->gm_mech.gm_release_name(
 159                                                 minor_status, &mc_name);
 160                                         continue;
 161                                 }
 162                                 mn->gmn_mech = &m->gm_mech;
 163                                 mn->gmn_mech_oid = m->gm_mech_oid;
 164                                 mn->gmn_name = mc_name;
 165                                 HEIM_TAILQ_INSERT_TAIL(&name->gn_mn, mn, gmn_link);
 166                         } else if (mc_name) {
 167                                 m->gm_mech.gm_release_name(minor_status,
 168                                     &mc_name);
 169                         }
 170
 171                         if (mc_lifetime < min_lifetime)
 172                                 min_lifetime = mc_lifetime;
 173
 174                         if (mechanisms)
 175                                 gss_add_oid_set_member(minor_status,
 176                                     m->gm_mech_oid, mechanisms);
 177                         found = TRUE;
 178                 }
 179         }
 180
 181         if (found && mechanisms) {
 182                 /* GM_USE_MG_CRED mechs (SPNEGO) always can be used */
 183                 HEIM_TAILQ_FOREACH(m, &_gss_mechs, gm_link) {
 184                         if ((m->gm_mech.gm_flags & GM_USE_MG_CRED) == 0)
 185                                 continue;
 186
 187                         gss_add_oid_set_member(minor_status,
 188                                                m->gm_mech_oid, mechanisms);
 189                 }
 190         }
 191
 192         if (found == FALSE || min_lifetime == 0) {
 193                 gss_name_t n = (gss_name_t)name;
 194                 if (n)
 195                         gss_release_name(minor_status, &n);
 196                 gss_release_oid_set(minor_status, mechanisms);
 197                 *minor_status = 0;
 198                 if (min_lifetime == 0)
 199                         return (GSS_S_CREDENTIALS_EXPIRED);
 200
 201                 return (GSS_S_NO_CRED);
 202         }
 203
 204         *minor_status = 0;
 205         if (name_ret)
 206                 *name_ret = (gss_name_t) name;
 207         if (lifetime)
 208                 *lifetime = min_lifetime;
 209         if (cred_usage) {
 210                 if ((usagemask & (AUSAGE|IUSAGE)) == (AUSAGE|IUSAGE))
 211                         *cred_usage = GSS_C_BOTH;
 212                 else if (usagemask & IUSAGE)
 213                         *cred_usage = GSS_C_INITIATE;
 214                 else if (usagemask & AUSAGE)
 215                         *cred_usage = GSS_C_ACCEPT;
 216         }
 217         return (GSS_S_COMPLETE);
 218 }