lib/libgssapi/gss_add_cred.c

   1 /*-
   2  * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
   3  *
   4  * Copyright (c) 2005 Doug Rabson
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  *
  16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  19  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  20  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  26  * SUCH DAMAGE.
  27  *
  28  *      $FreeBSD$
  29  */
  30
  31 #include <gssapi/gssapi.h>
  32 #include <stdlib.h>
  33 #include <errno.h>
  34
  35 #include "mech_switch.h"
  36 #include "cred.h"
  37 #include "name.h"
  38 #include "utils.h"
  39
  40 static struct _gss_mechanism_cred *
  41 _gss_copy_cred(struct _gss_mechanism_cred *mc)
  42 {
  43         struct _gss_mechanism_cred *new_mc;
  44         struct _gss_mech_switch *m = mc->gmc_mech;
  45         OM_uint32 major_status, minor_status;
  46         gss_name_t name;
  47         gss_cred_id_t cred;
  48         OM_uint32 initiator_lifetime, acceptor_lifetime;
  49         gss_cred_usage_t cred_usage;
  50
  51         major_status = m->gm_inquire_cred_by_mech(&minor_status,
  52             mc->gmc_cred, mc->gmc_mech_oid,
  53             &name, &initiator_lifetime, &acceptor_lifetime, &cred_usage);
  54         if (major_status) {
  55                 _gss_mg_error(m, major_status, minor_status);
  56                 return (0);
  57         }
  58
  59         major_status = m->gm_add_cred(&minor_status,
  60             GSS_C_NO_CREDENTIAL, name, mc->gmc_mech_oid,
  61             cred_usage, initiator_lifetime, acceptor_lifetime,
  62             &cred, 0, 0, 0);
  63         m->gm_release_name(&minor_status, &name);
  64
  65         if (major_status) {
  66                 _gss_mg_error(m, major_status, minor_status);
  67                 return (0);
  68         }
  69
  70         new_mc = malloc(sizeof(struct _gss_mechanism_cred));
  71         if (!new_mc) {
  72                 m->gm_release_cred(&minor_status, &cred);
  73                 return (0);
  74         }
  75         new_mc->gmc_mech = m;
  76         new_mc->gmc_mech_oid = &m->gm_mech_oid;
  77         new_mc->gmc_cred = cred;
  78
  79         return (new_mc);
  80 }
  81
  82 OM_uint32
  83 gss_add_cred(OM_uint32 *minor_status,
  84     const gss_cred_id_t input_cred_handle,
  85     const gss_name_t desired_name,
  86     const gss_OID desired_mech,
  87     gss_cred_usage_t cred_usage,
  88     OM_uint32 initiator_time_req,
  89     OM_uint32 acceptor_time_req,
  90     gss_cred_id_t *output_cred_handle,
  91     gss_OID_set *actual_mechs,
  92     OM_uint32 *initiator_time_rec,
  93     OM_uint32 *acceptor_time_rec)
  94 {
  95         OM_uint32 major_status;
  96         struct _gss_mech_switch *m;
  97         struct _gss_cred *cred = (struct _gss_cred *) input_cred_handle;
  98         struct _gss_cred *new_cred;
  99         gss_cred_id_t release_cred;
 100         struct _gss_mechanism_cred *mc, *target_mc, *copy_mc;
 101         struct _gss_mechanism_name *mn;
 102         OM_uint32 junk;
 103
 104         *minor_status = 0;
 105         *output_cred_handle = GSS_C_NO_CREDENTIAL;
 106         if (initiator_time_rec)
 107                 *initiator_time_rec = 0;
 108         if (acceptor_time_rec)
 109                 *acceptor_time_rec = 0;
 110         if (actual_mechs)
 111                 *actual_mechs = GSS_C_NO_OID_SET;
 112
 113         new_cred = malloc(sizeof(struct _gss_cred));
 114         if (!new_cred) {
 115                 *minor_status = ENOMEM;
 116                 return (GSS_S_FAILURE);
 117         }
 118         SLIST_INIT(&new_cred->gc_mc);
 119
 120         /*
 121          * We go through all the mc attached to the input_cred_handle
 122          * and check the mechanism. If it matches, we call
 123          * gss_add_cred for that mechanism, otherwise we copy the mc
 124          * to new_cred.
 125          */
 126         target_mc = NULL;
 127         if (cred) {
 128                 SLIST_FOREACH(mc, &cred->gc_mc, gmc_link) {
 129                         if (gss_oid_equal(mc->gmc_mech_oid, desired_mech)) {
 130                                 target_mc = mc;
 131                         }
 132                         copy_mc = _gss_copy_cred(mc);
 133                         if (!copy_mc) {
 134                                 release_cred = (gss_cred_id_t) new_cred;
 135                                 gss_release_cred(&junk, &release_cred);
 136                                 *minor_status = ENOMEM;
 137                                 return (GSS_S_FAILURE);
 138                         }
 139                         SLIST_INSERT_HEAD(&new_cred->gc_mc, copy_mc, gmc_link);
 140                 }
 141         }
 142
 143         /*
 144          * Figure out a suitable mn, if any.
 145          */
 146         if (desired_name) {
 147                 major_status = _gss_find_mn(minor_status,
 148                                             (struct _gss_name *) desired_name,
 149                                             desired_mech,
 150                                             &mn);
 151                 if (major_status != GSS_S_COMPLETE) {
 152                         free(new_cred);
 153                         return (major_status);
 154                 }
 155         } else {
 156                 mn = NULL;
 157         }
 158
 159         m = _gss_find_mech_switch(desired_mech);
 160
 161         mc = malloc(sizeof(struct _gss_mechanism_cred));
 162         if (!mc) {
 163                 release_cred = (gss_cred_id_t) new_cred;
 164                 gss_release_cred(&junk, &release_cred);
 165                 *minor_status = ENOMEM;
 166                 return (GSS_S_FAILURE);
 167         }
 168         mc->gmc_mech = m;
 169         mc->gmc_mech_oid = &m->gm_mech_oid;
 170
 171         major_status = m->gm_add_cred(minor_status,
 172             target_mc ? target_mc->gmc_cred : GSS_C_NO_CREDENTIAL,
 173             desired_name ? mn->gmn_name : GSS_C_NO_NAME,
 174             desired_mech,
 175             cred_usage,
 176             initiator_time_req,
 177             acceptor_time_req,
 178             &mc->gmc_cred,
 179             actual_mechs,
 180             initiator_time_rec,
 181             acceptor_time_rec);
 182
 183         if (major_status) {
 184                 _gss_mg_error(m, major_status, *minor_status);
 185                 release_cred = (gss_cred_id_t) new_cred;
 186                 gss_release_cred(&junk, &release_cred);
 187                 free(mc);
 188                 return (major_status);
 189         }
 190         SLIST_INSERT_HEAD(&new_cred->gc_mc, mc, gmc_link);
 191         *output_cred_handle = (gss_cred_id_t) new_cred;
 192
 193         return (GSS_S_COMPLETE);
 194 }
 195