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("$Id$");
  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 static OM_uint32
  55 get_string(OM_uint32 *minor_status,
  56            const gss_buffer_t value,
  57            char **str)
  58 {
  59     if (value == NULL || value->length == 0) {
  60         *str = NULL;
  61     } else {
  62         *str = malloc(value->length + 1);
  63         if (*str == NULL) {
  64             *minor_status = 0;
  65             return GSS_S_UNAVAILABLE;
  66         }
  67         memcpy(*str, value->value, value->length);
  68         (*str)[value->length] = '\0';
  69     }
  70     return GSS_S_COMPLETE;
  71 }
  72
  73 OM_uint32
  74 _gsskrb5_set_sec_context_option
  75            (OM_uint32 *minor_status,
  76             gss_ctx_id_t *context_handle,
  77             const gss_OID desired_object,
  78             const gss_buffer_t value)
  79 {
  80     krb5_context context;
  81     OM_uint32 maj_stat;
  82
  83     GSSAPI_KRB5_INIT (&context);
  84
  85     if (value == GSS_C_NO_BUFFER) {
  86         *minor_status = EINVAL;
  87         return GSS_S_FAILURE;
  88     }
  89
  90     if (gss_oid_equal(desired_object, GSS_KRB5_COMPAT_DES3_MIC_X)) {
  91         gsskrb5_ctx ctx;
  92         int flag;
  93
  94         if (*context_handle == GSS_C_NO_CONTEXT) {
  95             *minor_status = EINVAL;
  96             return GSS_S_NO_CONTEXT;
  97         }
  98
  99         maj_stat = get_bool(minor_status, value, &flag);
 100         if (maj_stat != GSS_S_COMPLETE)
 101             return maj_stat;
 102
 103         ctx = (gsskrb5_ctx)*context_handle;
 104         HEIMDAL_MUTEX_lock(&ctx->ctx_id_mutex);
 105         if (flag)
 106             ctx->more_flags |= COMPAT_OLD_DES3;
 107         else
 108             ctx->more_flags &= ~COMPAT_OLD_DES3;
 109         ctx->more_flags |= COMPAT_OLD_DES3_SELECTED;
 110         HEIMDAL_MUTEX_unlock(&ctx->ctx_id_mutex);
 111         return GSS_S_COMPLETE;
 112     } else if (gss_oid_equal(desired_object, GSS_KRB5_SET_DNS_CANONICALIZE_X)) {
 113         int flag;
 114
 115         maj_stat = get_bool(minor_status, value, &flag);
 116         if (maj_stat != GSS_S_COMPLETE)
 117             return maj_stat;
 118
 119         krb5_set_dns_canonicalize_hostname(context, flag);
 120         return GSS_S_COMPLETE;
 121
 122     } else if (gss_oid_equal(desired_object, GSS_KRB5_REGISTER_ACCEPTOR_IDENTITY_X)) {
 123         char *str;
 124
 125         maj_stat = get_string(minor_status, value, &str);
 126         if (maj_stat != GSS_S_COMPLETE)
 127             return maj_stat;
 128
 129         _gsskrb5_register_acceptor_identity(str);
 130         free(str);
 131
 132         *minor_status = 0;
 133         return GSS_S_COMPLETE;
 134
 135     } else if (gss_oid_equal(desired_object, GSS_KRB5_SET_DEFAULT_REALM_X)) {
 136         char *str;
 137
 138         maj_stat = get_string(minor_status, value, &str);
 139         if (maj_stat != GSS_S_COMPLETE)
 140             return maj_stat;
 141         if (str == NULL) {
 142             *minor_status = 0;
 143             return GSS_S_CALL_INACCESSIBLE_READ;
 144         }
 145
 146         krb5_set_default_realm(context, str);
 147         free(str);
 148
 149         *minor_status = 0;
 150         return GSS_S_COMPLETE;
 151
 152     } else if (gss_oid_equal(desired_object, GSS_KRB5_SEND_TO_KDC_X)) {
 153
 154         if (value == NULL || value->length == 0) {
 155             krb5_set_send_to_kdc_func(context, NULL, NULL);
 156         } else {
 157             struct gsskrb5_send_to_kdc c;
 158
 159             if (value->length != sizeof(c)) {
 160                 *minor_status = EINVAL;
 161                 return GSS_S_FAILURE;
 162             }
 163             memcpy(&c, value->value, sizeof(c));
 164             krb5_set_send_to_kdc_func(context,
 165                                       (krb5_send_to_kdc_func)c.func,
 166                                       c.ptr);
 167         }
 168
 169         *minor_status = 0;
 170         return GSS_S_COMPLETE;
 171     } else if (gss_oid_equal(desired_object, GSS_KRB5_CCACHE_NAME_X)) {
 172         char *str;
 173
 174         maj_stat = get_string(minor_status, value, &str);
 175         if (maj_stat != GSS_S_COMPLETE)
 176             return maj_stat;
 177         if (str == NULL) {
 178             *minor_status = 0;
 179             return GSS_S_CALL_INACCESSIBLE_READ;
 180         }
 181
 182         *minor_status = krb5_cc_set_default_name(context, str);
 183         free(str);
 184         if (*minor_status)
 185             return GSS_S_FAILURE;
 186
 187         return GSS_S_COMPLETE;
 188     }
 189
 190     *minor_status = EINVAL;
 191     return GSS_S_FAILURE;
 192 }