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