lib/gssapi/mech/gss_acquire_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_acquire_cred.c,v 1.1 2005/12/29 14:40:20 dfr Exp $
  27  */
  28
  29 #include "mech_locl.h"
  30
  31 OM_uint32 GSSAPI_LIB_FUNCTION
  32 gss_acquire_cred(OM_uint32 *minor_status,
  33     const gss_name_t desired_name,
  34     OM_uint32 time_req,
  35     const gss_OID_set desired_mechs,
  36     gss_cred_usage_t cred_usage,
  37     gss_cred_id_t *output_cred_handle,
  38     gss_OID_set *actual_mechs,
  39     OM_uint32 *time_rec)
  40 {
  41         OM_uint32 major_status;
  42         gss_OID_set mechs = desired_mechs;
  43         gss_OID_set_desc set;
  44         struct _gss_name *name = (struct _gss_name *) desired_name;
  45         gssapi_mech_interface m;
  46         struct _gss_cred *cred;
  47         struct _gss_mechanism_cred *mc;
  48         OM_uint32 min_time, cred_time;
  49         int i;
  50
  51         *minor_status = 0;
  52         if (output_cred_handle == NULL)
  53             return GSS_S_CALL_INACCESSIBLE_READ;
  54         if (actual_mechs)
  55             *actual_mechs = GSS_C_NO_OID_SET;
  56         if (time_rec)
  57             *time_rec = 0;
  58
  59         _gss_load_mech();
  60
  61         /*
  62          * First make sure that at least one of the requested
  63          * mechanisms is one that we support.
  64          */
  65         if (mechs) {
  66                 for (i = 0; i < mechs->count; i++) {
  67                         int t;
  68                         gss_test_oid_set_member(minor_status,
  69                             &mechs->elements[i], _gss_mech_oids, &t);
  70                         if (t)
  71                                 break;
  72                 }
  73                 if (i == mechs->count) {
  74                         *minor_status = 0;
  75                         return (GSS_S_BAD_MECH);
  76                 }
  77         }
  78
  79         if (actual_mechs) {
  80                 major_status = gss_create_empty_oid_set(minor_status,
  81                     actual_mechs);
  82                 if (major_status)
  83                         return (major_status);
  84         }
  85
  86         cred = malloc(sizeof(struct _gss_cred));
  87         if (!cred) {
  88                 if (actual_mechs)
  89                         gss_release_oid_set(minor_status, actual_mechs);
  90                 *minor_status = ENOMEM;
  91                 return (GSS_S_FAILURE);
  92         }
  93         SLIST_INIT(&cred->gc_mc);
  94
  95         if (mechs == GSS_C_NO_OID_SET)
  96                 mechs = _gss_mech_oids;
  97
  98         set.count = 1;
  99         min_time = GSS_C_INDEFINITE;
 100         for (i = 0; i < mechs->count; i++) {
 101                 struct _gss_mechanism_name *mn = NULL;
 102
 103                 m = __gss_get_mechanism(&mechs->elements[i]);
 104                 if (!m)
 105                         continue;
 106
 107                 if (desired_name != GSS_C_NO_NAME) {
 108                         major_status = _gss_find_mn(minor_status, name,
 109                                                     &mechs->elements[i], &mn);
 110                         if (major_status != GSS_S_COMPLETE)
 111                                 continue;
 112                 }
 113
 114                 mc = malloc(sizeof(struct _gss_mechanism_cred));
 115                 if (!mc) {
 116                         continue;
 117                 }
 118                 mc->gmc_mech = m;
 119                 mc->gmc_mech_oid = &m->gm_mech_oid;
 120
 121                 /*
 122                  * XXX Probably need to do something with actual_mechs.
 123                  */
 124                 set.elements = &mechs->elements[i];
 125                 major_status = m->gm_acquire_cred(minor_status,
 126                     (desired_name != GSS_C_NO_NAME
 127                         ? mn->gmn_name : GSS_C_NO_NAME),
 128                     time_req, &set, cred_usage,
 129                     &mc->gmc_cred, NULL, &cred_time);
 130                 if (major_status) {
 131                         free(mc);
 132                         continue;
 133                 }
 134                 if (cred_time < min_time)
 135                         min_time = cred_time;
 136
 137                 if (actual_mechs) {
 138                         major_status = gss_add_oid_set_member(minor_status,
 139                             mc->gmc_mech_oid, actual_mechs);
 140                         if (major_status) {
 141                                 m->gm_release_cred(minor_status,
 142                                     &mc->gmc_cred);
 143                                 free(mc);
 144                                 continue;
 145                         }
 146                 }
 147
 148                 SLIST_INSERT_HEAD(&cred->gc_mc, mc, gmc_link);
 149         }
 150
 151         /*
 152          * If we didn't manage to create a single credential, return
 153          * an error.
 154          */
 155         if (!SLIST_FIRST(&cred->gc_mc)) {
 156                 free(cred);
 157                 if (actual_mechs)
 158                         gss_release_oid_set(minor_status, actual_mechs);
 159                 *minor_status = 0;
 160                 return (GSS_S_NO_CRED);
 161         }
 162
 163         if (time_rec)
 164                 *time_rec = min_time;
 165         *output_cred_handle = (gss_cred_id_t) cred;
 166         *minor_status = 0;
 167         return (GSS_S_COMPLETE);
 168 }