crypto/external/bsd/heimdal/dist/lib/gssapi/mech/gss_acquire_cred.c

   1 /*      $NetBSD: gss_acquire_cred.c,v 1.1.1.2 2014/04/24 12:45:29 pettai Exp $  */
   2
   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: src/lib/libgssapi/gss_acquire_cred.c,v 1.1 2005/12/29 14:40:20 dfr Exp $
  29  */
  30
  31 #include "mech_locl.h"
  32
  33 GSSAPI_LIB_FUNCTION OM_uint32 GSSAPI_LIB_CALL
  34 gss_acquire_cred(OM_uint32 *minor_status,
  35     const gss_name_t desired_name,
  36     OM_uint32 time_req,
  37     const gss_OID_set desired_mechs,
  38     gss_cred_usage_t cred_usage,
  39     gss_cred_id_t *output_cred_handle,
  40     gss_OID_set *actual_mechs,
  41     OM_uint32 *time_rec)
  42 {
  43         OM_uint32 major_status;
  44         gss_OID_set mechs = desired_mechs;
  45         gss_OID_set_desc set;
  46         struct _gss_name *name = (struct _gss_name *) desired_name;
  47         gssapi_mech_interface m;
  48         struct _gss_cred *cred;
  49         struct _gss_mechanism_cred *mc;
  50         OM_uint32 min_time, cred_time;
  51         size_t i;
  52
  53         *minor_status = 0;
  54         if (output_cred_handle == NULL)
  55             return GSS_S_CALL_INACCESSIBLE_READ;
  56         if (actual_mechs)
  57             *actual_mechs = GSS_C_NO_OID_SET;
  58         if (time_rec)
  59             *time_rec = 0;
  60
  61         _gss_load_mech();
  62
  63         /*
  64          * First make sure that at least one of the requested
  65          * mechanisms is one that we support.
  66          */
  67         if (mechs) {
  68                 for (i = 0; i < mechs->count; i++) {
  69                         int t;
  70                         gss_test_oid_set_member(minor_status,
  71                             &mechs->elements[i], _gss_mech_oids, &t);
  72                         if (t)
  73                                 break;
  74                 }
  75                 if (i == mechs->count) {
  76                         *minor_status = 0;
  77                         return (GSS_S_BAD_MECH);
  78                 }
  79         }
  80
  81         if (actual_mechs) {
  82                 major_status = gss_create_empty_oid_set(minor_status,
  83                     actual_mechs);
  84                 if (major_status)
  85                         return (major_status);
  86         }
  87
  88         cred = malloc(sizeof(struct _gss_cred));
  89         if (!cred) {
  90                 if (actual_mechs)
  91                         gss_release_oid_set(minor_status, actual_mechs);
  92                 *minor_status = ENOMEM;
  93                 return (GSS_S_FAILURE);
  94         }
  95         HEIM_SLIST_INIT(&cred->gc_mc);
  96
  97         if (mechs == GSS_C_NO_OID_SET)
  98                 mechs = _gss_mech_oids;
  99
 100         set.count = 1;
 101         min_time = GSS_C_INDEFINITE;
 102         for (i = 0; i < mechs->count; i++) {
 103                 struct _gss_mechanism_name *mn = NULL;
 104
 105                 m = __gss_get_mechanism(&mechs->elements[i]);
 106                 if (!m)
 107                         continue;
 108
 109                 if (desired_name != GSS_C_NO_NAME) {
 110                         major_status = _gss_find_mn(minor_status, name,
 111                                                     &mechs->elements[i], &mn);
 112                         if (major_status != GSS_S_COMPLETE)
 113                                 continue;
 114                 }
 115
 116                 mc = malloc(sizeof(struct _gss_mechanism_cred));
 117                 if (!mc) {
 118                         continue;
 119                 }
 120                 mc->gmc_mech = m;
 121                 mc->gmc_mech_oid = &m->gm_mech_oid;
 122
 123                 /*
 124                  * XXX Probably need to do something with actual_mechs.
 125                  */
 126                 set.elements = &mechs->elements[i];
 127                 major_status = m->gm_acquire_cred(minor_status,
 128                     (desired_name != GSS_C_NO_NAME
 129                         ? mn->gmn_name : GSS_C_NO_NAME),
 130                     time_req, &set, cred_usage,
 131                     &mc->gmc_cred, NULL, &cred_time);
 132                 if (major_status) {
 133                         free(mc);
 134                         continue;
 135                 }
 136                 if (cred_time < min_time)
 137                         min_time = cred_time;
 138
 139                 if (actual_mechs) {
 140                         major_status = gss_add_oid_set_member(minor_status,
 141                             mc->gmc_mech_oid, actual_mechs);
 142                         if (major_status) {
 143                                 m->gm_release_cred(minor_status,
 144                                     &mc->gmc_cred);
 145                                 free(mc);
 146                                 continue;
 147                         }
 148                 }
 149
 150                 HEIM_SLIST_INSERT_HEAD(&cred->gc_mc, mc, gmc_link);
 151         }
 152
 153         /*
 154          * If we didn't manage to create a single credential, return
 155          * an error.
 156          */
 157         if (!HEIM_SLIST_FIRST(&cred->gc_mc)) {
 158                 free(cred);
 159                 if (actual_mechs)
 160                         gss_release_oid_set(minor_status, actual_mechs);
 161                 *minor_status = 0;
 162                 return (GSS_S_NO_CRED);
 163         }
 164
 165         if (time_rec)
 166                 *time_rec = min_time;
 167         *output_cred_handle = (gss_cred_id_t) cred;
 168         *minor_status = 0;
 169         return (GSS_S_COMPLETE);
 170 }