00c5c484a9
git-svn-id: svn://svn.h5l.se/heimdal/trunk/heimdal@18459 ec53bebd-3082-4978-b11e-865c3cabbd6b
353 lines
9.3 KiB
C
353 lines
9.3 KiB
C
/*
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* Copyright (c) 2004, PADL Software Pty Ltd.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* 3. Neither the name of PADL Software nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY PADL SOFTWARE AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL PADL SOFTWARE OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include "krb5/gsskrb5_locl.h"
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RCSID("$Id$");
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static int
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oid_prefix_equal(gss_OID oid_enc, gss_OID prefix_enc, unsigned *suffix)
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{
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int ret;
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heim_oid oid;
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heim_oid prefix;
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*suffix = 0;
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ret = der_get_oid(oid_enc->elements, oid_enc->length,
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&oid, NULL);
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if (ret) {
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return 0;
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}
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ret = der_get_oid(prefix_enc->elements, prefix_enc->length,
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&prefix, NULL);
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if (ret) {
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der_free_oid(&oid);
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return 0;
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}
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ret = 0;
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if (oid.length - 1 == prefix.length) {
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*suffix = oid.components[oid.length - 1];
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oid.length--;
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ret = (der_heim_oid_cmp(&oid, &prefix) == 0);
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oid.length++;
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}
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der_free_oid(&oid);
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der_free_oid(&prefix);
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return ret;
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}
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static OM_uint32 inquire_sec_context_tkt_flags
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(OM_uint32 *minor_status,
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const gsskrb5_ctx context_handle,
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gss_buffer_set_t *data_set)
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{
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OM_uint32 tkt_flags;
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unsigned char buf[4];
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gss_buffer_desc value;
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HEIMDAL_MUTEX_lock(&context_handle->ctx_id_mutex);
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if (context_handle->ticket == NULL) {
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HEIMDAL_MUTEX_unlock(&context_handle->ctx_id_mutex);
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*minor_status = EINVAL;
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return GSS_S_BAD_MECH;
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}
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tkt_flags = TicketFlags2int(context_handle->ticket->ticket.flags);
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HEIMDAL_MUTEX_unlock(&context_handle->ctx_id_mutex);
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_gsskrb5_encode_om_uint32(tkt_flags, buf);
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value.length = sizeof(buf);
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value.value = buf;
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return gss_add_buffer_set_member(minor_status,
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&value,
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data_set);
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}
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static OM_uint32 inquire_sec_context_authz_data
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(OM_uint32 *minor_status,
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const gsskrb5_ctx context_handle,
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unsigned ad_type,
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gss_buffer_set_t *data_set)
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{
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krb5_data data;
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gss_buffer_desc ad_data;
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OM_uint32 ret;
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*minor_status = 0;
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*data_set = GSS_C_NO_BUFFER_SET;
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HEIMDAL_MUTEX_lock(&context_handle->ctx_id_mutex);
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if (context_handle->ticket == NULL) {
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HEIMDAL_MUTEX_unlock(&context_handle->ctx_id_mutex);
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*minor_status = EINVAL;
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return GSS_S_FAILURE;
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}
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ret = krb5_ticket_get_authorization_data_type(_gsskrb5_context,
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context_handle->ticket,
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ad_type,
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&data);
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HEIMDAL_MUTEX_unlock(&context_handle->ctx_id_mutex);
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if (ret) {
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*minor_status = ret;
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return GSS_S_FAILURE;
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}
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ad_data.value = data.data;
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ad_data.length = data.length;
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ret = gss_add_buffer_set_member(minor_status,
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&ad_data,
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data_set);
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krb5_data_free(&data);
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return ret;
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}
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static OM_uint32 inquire_sec_context_has_updated_spnego
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(OM_uint32 *minor_status,
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const gsskrb5_ctx context_handle,
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gss_buffer_set_t *data_set)
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{
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int is_updated = 0;
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*minor_status = 0;
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*data_set = GSS_C_NO_BUFFER_SET;
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/*
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* For Windows SPNEGO implementations, both the initiator and the
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* acceptor are assumed to have been updated if a "newer" [CLAR] or
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* different enctype is negotiated for use by the Kerberos GSS-API
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* mechanism.
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*/
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HEIMDAL_MUTEX_lock(&context_handle->ctx_id_mutex);
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_gsskrb5i_is_cfx(context_handle, &is_updated);
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if (is_updated == 0) {
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krb5_keyblock *acceptor_subkey;
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if (context_handle->more_flags & LOCAL)
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acceptor_subkey = context_handle->auth_context->remote_subkey;
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else
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acceptor_subkey = context_handle->auth_context->local_subkey;
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if (acceptor_subkey != NULL)
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is_updated = (acceptor_subkey->keytype !=
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context_handle->auth_context->keyblock->keytype);
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}
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HEIMDAL_MUTEX_unlock(&context_handle->ctx_id_mutex);
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return is_updated ? GSS_S_COMPLETE : GSS_S_FAILURE;
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}
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/*
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*
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*/
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static OM_uint32
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export_lucid_sec_context_v1(OM_uint32 *minor_status,
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gsskrb5_ctx context_handle,
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gss_buffer_set_t *data_set)
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{
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krb5_storage *sp = NULL;
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OM_uint32 major_status = GSS_S_COMPLETE;
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krb5_error_code ret;
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krb5_keyblock *key = NULL;
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int32_t number;
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int is_cfx;
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krb5_data data;
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*minor_status = 0;
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GSSAPI_KRB5_INIT ();
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HEIMDAL_MUTEX_lock(&context_handle->ctx_id_mutex);
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_gsskrb5i_is_cfx(context_handle, &is_cfx);
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sp = krb5_storage_emem();
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if (sp == NULL) {
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ret = ENOMEM;
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goto out;
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}
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ret = krb5_store_int32(sp, 1);
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if (ret) goto out;
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ret = krb5_store_int32(sp, (context_handle->more_flags & LOCAL) ? 1 : 0);
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if (ret) goto out;
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ret = krb5_store_int32(sp, context_handle->lifetime);
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if (ret) goto out;
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krb5_auth_con_getlocalseqnumber (_gsskrb5_context,
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context_handle->auth_context,
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&number);
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ret = krb5_store_uint32(sp, (uint32_t)0); /* store top half as zero */
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ret = krb5_store_uint32(sp, (uint32_t)number);
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krb5_auth_getremoteseqnumber (_gsskrb5_context,
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context_handle->auth_context,
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&number);
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ret = krb5_store_uint32(sp, (uint32_t)0); /* store top half as zero */
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ret = krb5_store_uint32(sp, (uint32_t)number);
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ret = krb5_store_int32(sp, (is_cfx) ? 1 : 0);
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if (ret) goto out;
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ret = _gsskrb5i_get_subkey(context_handle, &key);
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if (ret) goto out;
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if (is_cfx == 0) {
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int sign_alg, seal_alg;
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switch (key->keytype) {
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case ETYPE_DES_CBC_CRC:
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case ETYPE_DES_CBC_MD4:
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case ETYPE_DES_CBC_MD5:
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sign_alg = 0;
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seal_alg = 0;
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break;
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case ETYPE_DES3_CBC_MD5:
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case ETYPE_DES3_CBC_SHA1:
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sign_alg = 4;
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seal_alg = 2;
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break;
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case ETYPE_ARCFOUR_HMAC_MD5:
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case ETYPE_ARCFOUR_HMAC_MD5_56:
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sign_alg = 17;
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seal_alg = 16;
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break;
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default:
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sign_alg = -1;
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seal_alg = -1;
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break;
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}
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ret = krb5_store_int32(sp, sign_alg);
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if (ret) goto out;
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ret = krb5_store_int32(sp, seal_alg);
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if (ret) goto out;
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/* ctx_key */
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ret = krb5_store_keyblock(sp, *key);
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if (ret) goto out;
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} else {
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int subkey_p = (context_handle->more_flags & ACCEPTOR_SUBKEY) ? 1 : 0;
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/* have_acceptor_subkey */
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ret = krb5_store_int32(sp, subkey_p);
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if (ret) goto out;
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/* ctx_key */
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ret = krb5_store_keyblock(sp, *key);
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if (ret) goto out;
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/* acceptor_subkey */
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if (subkey_p) {
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ret = krb5_store_keyblock(sp, *key);
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if (ret) goto out;
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}
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}
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ret = krb5_storage_to_data(sp, &data);
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if (ret) goto out;
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{
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gss_buffer_desc ad_data;
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ad_data.value = data.data;
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ad_data.length = data.length;
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ret = gss_add_buffer_set_member(minor_status, &ad_data, data_set);
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krb5_data_free(&data);
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if (ret)
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goto out;
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}
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out:
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if (key)
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krb5_free_keyblock (_gsskrb5_context, key);
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if (sp)
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krb5_storage_free(sp);
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if (ret) {
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*minor_status = ret;
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major_status = GSS_S_FAILURE;
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}
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HEIMDAL_MUTEX_unlock(&context_handle->ctx_id_mutex);
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return major_status;
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}
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OM_uint32 _gsskrb5_inquire_sec_context_by_oid
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(OM_uint32 *minor_status,
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const gss_ctx_id_t context_handle,
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const gss_OID desired_object,
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gss_buffer_set_t *data_set)
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{
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const gsskrb5_ctx ctx = (const gsskrb5_ctx) context_handle;
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unsigned suffix;
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if (ctx == NULL) {
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*minor_status = EINVAL;
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return GSS_S_NO_CONTEXT;
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}
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if (gss_oid_equal(desired_object, GSS_KRB5_GET_TKT_FLAGS_X)) {
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return inquire_sec_context_tkt_flags(minor_status,
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ctx,
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data_set);
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} else if (gss_oid_equal(desired_object, GSS_C_PEER_HAS_UPDATED_SPNEGO)) {
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return inquire_sec_context_has_updated_spnego(minor_status,
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ctx,
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data_set);
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} else if (oid_prefix_equal(desired_object,
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GSS_KRB5_EXTRACT_AUTHZ_DATA_FROM_SEC_CONTEXT_X,
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&suffix)) {
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return inquire_sec_context_authz_data(minor_status,
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ctx,
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suffix,
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data_set);
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} else if (oid_prefix_equal(desired_object,
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GSS_KRB5_EXPORT_LUCID_CONTEXT_X,
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&suffix)) {
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if (suffix == 1)
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return export_lucid_sec_context_v1(minor_status,
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ctx,
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data_set);
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*minor_status = 0;
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return GSS_S_FAILURE;
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} else {
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*minor_status = 0;
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return GSS_S_FAILURE;
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}
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}
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