source/heimdal/lib/gssapi/krb5/set_sec_context_option.c

   1 /*
   2  * Copyright (c) 2004, PADL Software Pty Ltd.
   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  *
   9  * 1. Redistributions of source code must retain the above copyright
  10  *    notice, this list of conditions and the following disclaimer.
  11  *
  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  * 3. Neither the name of PADL Software nor the names of its contributors
  17  *    may be used to endorse or promote products derived from this software
  18  *    without specific prior written permission.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY PADL SOFTWARE AND CONTRIBUTORS ``AS IS'' AND
  21  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  23  * ARE DISCLAIMED.  IN NO EVENT SHALL PADL SOFTWARE OR CONTRIBUTORS BE LIABLE
  24  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  25  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  26  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  28  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  29  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  30  * SUCH DAMAGE.
  31  */
  32
  33 /*
  34  *  glue routine for _gsskrb5_inquire_sec_context_by_oid
  35  */
  36
  37 #include "krb5/gsskrb5_locl.h"
  38
  39 RCSID("$Id: set_sec_context_option.c,v 1.8 2006/11/08 23:06:42 lha Exp $");
  40
  41 static OM_uint32
  42 get_bool(OM_uint32 *minor_status,
  43          const gss_buffer_t value,
  44          int *flag)
  45 {
  46     if (value->value == NULL || value->length != 1) {
  47         *minor_status = EINVAL;
  48         return GSS_S_FAILURE;
  49     }
  50     *flag = *((const char *)value->value) != 0;
  51     return GSS_S_COMPLETE;
  52 }
  53
  54 OM_uint32
  55 _gsskrb5_set_sec_context_option
  56            (OM_uint32 *minor_status,
  57             gss_ctx_id_t *context_handle,
  58             const gss_OID desired_object,
  59             const gss_buffer_t value)
  60 {
  61     OM_uint32 maj_stat;
  62
  63     GSSAPI_KRB5_INIT ();
  64
  65     if (value == GSS_C_NO_BUFFER) {
  66         *minor_status = EINVAL;
  67         return GSS_S_FAILURE;
  68     }
  69
  70     if (gss_oid_equal(desired_object, GSS_KRB5_COMPAT_DES3_MIC_X)) {
  71         gsskrb5_ctx ctx;
  72         int flag;
  73
  74         if (*context_handle == GSS_C_NO_CONTEXT) {
  75             *minor_status = EINVAL;
  76             return GSS_S_NO_CONTEXT;
  77         }
  78
  79         maj_stat = get_bool(minor_status, value, &flag);
  80         if (maj_stat != GSS_S_COMPLETE)
  81             return maj_stat;
  82
  83         ctx = (gsskrb5_ctx)*context_handle;
  84         HEIMDAL_MUTEX_lock(&ctx->ctx_id_mutex);
  85         if (flag)
  86             ctx->more_flags |= COMPAT_OLD_DES3;
  87         else
  88             ctx->more_flags &= ~COMPAT_OLD_DES3;
  89         ctx->more_flags |= COMPAT_OLD_DES3_SELECTED;
  90         HEIMDAL_MUTEX_unlock(&ctx->ctx_id_mutex);
  91         return GSS_S_COMPLETE;
  92     } else if (gss_oid_equal(desired_object, GSS_KRB5_SET_DNS_CANONICALIZE_X)) {
  93         int flag;
  94
  95         maj_stat = get_bool(minor_status, value, &flag);
  96         if (maj_stat != GSS_S_COMPLETE)
  97             return maj_stat;
  98
  99         krb5_set_dns_canonicalize_hostname(_gsskrb5_context, flag);
 100         return GSS_S_COMPLETE;
 101
 102     } else if (gss_oid_equal(desired_object, GSS_KRB5_REGISTER_ACCEPTOR_IDENTITY_X)) {
 103         char *str;
 104
 105         if (value == NULL || value->length == 0) {
 106             str = NULL;
 107         } else {
 108             str = malloc(value->length + 1);
 109             if (str) {
 110                 *minor_status = 0;
 111                 return GSS_S_UNAVAILABLE;
 112             }
 113             memcpy(str, value->value, value->length);
 114             str[value->length] = '\0';
 115         }
 116
 117         _gsskrb5_register_acceptor_identity(str);
 118         free(str);
 119
 120         *minor_status = 0;
 121         return GSS_S_COMPLETE;
 122
 123     } else if (gss_oid_equal(desired_object, GSS_KRB5_SET_DEFAULT_REALM_X)) {
 124         char *str;
 125
 126         if (value == NULL || value->length == 0) {
 127             *minor_status = 0;
 128             return GSS_S_CALL_INACCESSIBLE_READ;
 129         }
 130         str = malloc(value->length + 1);
 131         if (str) {
 132             *minor_status = 0;
 133             return GSS_S_UNAVAILABLE;
 134         }
 135         memcpy(str, value->value, value->length);
 136         str[value->length] = '\0';
 137
 138         krb5_set_default_realm(_gsskrb5_context, str);
 139         free(str);
 140
 141         *minor_status = 0;
 142         return GSS_S_COMPLETE;
 143
 144     } else if (gss_oid_equal(desired_object, GSS_KRB5_SEND_TO_KDC_X)) {
 145
 146         if (value == NULL || value->length == 0) {
 147             krb5_set_send_to_kdc_func(_gsskrb5_context, NULL, NULL);
 148         } else {
 149             struct gsskrb5_send_to_kdc c;
 150
 151             if (value->length != sizeof(c)) {
 152                 *minor_status = EINVAL;
 153                 return GSS_S_FAILURE;
 154             }
 155             memcpy(&c, value->value, sizeof(c));
 156             krb5_set_send_to_kdc_func(_gsskrb5_context,
 157                                       (krb5_send_to_kdc_func)c.func,
 158                                       c.ptr);
 159         }
 160
 161         *minor_status = 0;
 162         return GSS_S_COMPLETE;
 163     }
 164
 165
 166     *minor_status = EINVAL;
 167     return GSS_S_FAILURE;
 168 }