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