lib/libgssapi/gss_add_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  *      $FreeBSD$
  27  */
  28
  29 #include <gssapi/gssapi.h>
  30 #include <stdlib.h>
  31 #include <errno.h>
  32
  33 #include "mech_switch.h"
  34 #include "cred.h"
  35 #include "name.h"
  36 #include "utils.h"
  37
  38 static struct _gss_mechanism_cred *
  39 _gss_copy_cred(struct _gss_mechanism_cred *mc)
  40 {
  41         struct _gss_mechanism_cred *new_mc;
  42         struct _gss_mech_switch *m = mc->gmc_mech;
  43         OM_uint32 major_status, minor_status;
  44         gss_name_t name;
  45         gss_cred_id_t cred;
  46         OM_uint32 initiator_lifetime, acceptor_lifetime;
  47         gss_cred_usage_t cred_usage;
  48
  49         major_status = m->gm_inquire_cred_by_mech(&minor_status,
  50             mc->gmc_cred, mc->gmc_mech_oid,
  51             &name, &initiator_lifetime, &acceptor_lifetime, &cred_usage);
  52         if (major_status) {
  53                 _gss_mg_error(m, major_status, minor_status);
  54                 return (0);
  55         }
  56
  57         major_status = m->gm_add_cred(&minor_status,
  58             GSS_C_NO_CREDENTIAL, name, mc->gmc_mech_oid,
  59             cred_usage, initiator_lifetime, acceptor_lifetime,
  60             &cred, 0, 0, 0);
  61         m->gm_release_name(&minor_status, &name);
  62
  63         if (major_status) {
  64                 _gss_mg_error(m, major_status, minor_status);
  65                 return (0);
  66         }
  67
  68         new_mc = malloc(sizeof(struct _gss_mechanism_cred));
  69         if (!new_mc) {
  70                 m->gm_release_cred(&minor_status, &cred);
  71                 return (0);
  72         }
  73         new_mc->gmc_mech = m;
  74         new_mc->gmc_mech_oid = &m->gm_mech_oid;
  75         new_mc->gmc_cred = cred;
  76
  77         return (new_mc);
  78 }
  79
  80 OM_uint32
  81 gss_add_cred(OM_uint32 *minor_status,
  82     const gss_cred_id_t input_cred_handle,
  83     const gss_name_t desired_name,
  84     const gss_OID desired_mech,
  85     gss_cred_usage_t cred_usage,
  86     OM_uint32 initiator_time_req,
  87     OM_uint32 acceptor_time_req,
  88     gss_cred_id_t *output_cred_handle,
  89     gss_OID_set *actual_mechs,
  90     OM_uint32 *initiator_time_rec,
  91     OM_uint32 *acceptor_time_rec)
  92 {
  93         OM_uint32 major_status;
  94         struct _gss_mech_switch *m;
  95         struct _gss_cred *cred = (struct _gss_cred *) input_cred_handle;
  96         struct _gss_cred *new_cred;
  97         gss_cred_id_t release_cred;
  98         struct _gss_mechanism_cred *mc, *target_mc, *copy_mc;
  99         struct _gss_mechanism_name *mn;
 100         OM_uint32 junk;
 101
 102         *minor_status = 0;
 103         *output_cred_handle = GSS_C_NO_CREDENTIAL;
 104         if (initiator_time_rec)
 105                 *initiator_time_rec = 0;
 106         if (acceptor_time_rec)
 107                 *acceptor_time_rec = 0;
 108         if (actual_mechs)
 109                 *actual_mechs = GSS_C_NO_OID_SET;
 110
 111         new_cred = malloc(sizeof(struct _gss_cred));
 112         if (!new_cred) {
 113                 *minor_status = ENOMEM;
 114                 return (GSS_S_FAILURE);
 115         }
 116         SLIST_INIT(&new_cred->gc_mc);
 117
 118         /*
 119          * We go through all the mc attached to the input_cred_handle
 120          * and check the mechanism. If it matches, we call
 121          * gss_add_cred for that mechanism, otherwise we copy the mc
 122          * to new_cred.
 123          */
 124         target_mc = 0;
 125         if (cred) {
 126                 SLIST_FOREACH(mc, &cred->gc_mc, gmc_link) {
 127                         if (gss_oid_equal(mc->gmc_mech_oid, desired_mech)) {
 128                                 target_mc = mc;
 129                         }
 130                         copy_mc = _gss_copy_cred(mc);
 131                         if (!copy_mc) {
 132                                 release_cred = (gss_cred_id_t) new_cred;
 133                                 gss_release_cred(&junk, &release_cred);
 134                                 *minor_status = ENOMEM;
 135                                 return (GSS_S_FAILURE);
 136                         }
 137                         SLIST_INSERT_HEAD(&new_cred->gc_mc, copy_mc, gmc_link);
 138                 }
 139         }
 140
 141         /*
 142          * Figure out a suitable mn, if any.
 143          */
 144         if (desired_name) {
 145                 major_status = _gss_find_mn(minor_status,
 146                                             (struct _gss_name *) desired_name,
 147                                             desired_mech,
 148                                             &mn);
 149                 if (major_status != GSS_S_COMPLETE) {
 150                         free(new_cred);
 151                         return (major_status);
 152                 }
 153         } else {
 154                 mn = 0;
 155         }
 156
 157         m = _gss_find_mech_switch(desired_mech);
 158
 159         mc = malloc(sizeof(struct _gss_mechanism_cred));
 160         if (!mc) {
 161                 release_cred = (gss_cred_id_t) new_cred;
 162                 gss_release_cred(&junk, &release_cred);
 163                 *minor_status = ENOMEM;
 164                 return (GSS_S_FAILURE);
 165         }
 166         mc->gmc_mech = m;
 167         mc->gmc_mech_oid = &m->gm_mech_oid;
 168
 169         major_status = m->gm_add_cred(minor_status,
 170             target_mc ? target_mc->gmc_cred : GSS_C_NO_CREDENTIAL,
 171             desired_name ? mn->gmn_name : GSS_C_NO_NAME,
 172             desired_mech,
 173             cred_usage,
 174             initiator_time_req,
 175             acceptor_time_req,
 176             &mc->gmc_cred,
 177             actual_mechs,
 178             initiator_time_rec,
 179             acceptor_time_rec);
 180
 181         if (major_status) {
 182                 _gss_mg_error(m, major_status, *minor_status);
 183                 release_cred = (gss_cred_id_t) new_cred;
 184                 gss_release_cred(&junk, &release_cred);
 185                 free(mc);
 186                 return (major_status);
 187         }
 188         SLIST_INSERT_HEAD(&new_cred->gc_mc, mc, gmc_link);
 189         *output_cred_handle = (gss_cred_id_t) new_cred;
 190
 191         return (GSS_S_COMPLETE);
 192 }
 193