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| Current File : //usr/src/crypto/heimdal/lib/gssapi/krb5/inquire_sec_context_by_oid.c |
/*
* Copyright (c) 2004, PADL Software Pty Ltd.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* 3. Neither the name of PADL Software nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY PADL SOFTWARE AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL PADL SOFTWARE OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include "krb5/gsskrb5_locl.h"
RCSID("$Id: inquire_sec_context_by_oid.c 19031 2006-11-13 18:02:57Z lha $");
static int
oid_prefix_equal(gss_OID oid_enc, gss_OID prefix_enc, unsigned *suffix)
{
int ret;
heim_oid oid;
heim_oid prefix;
*suffix = 0;
ret = der_get_oid(oid_enc->elements, oid_enc->length,
&oid, NULL);
if (ret) {
return 0;
}
ret = der_get_oid(prefix_enc->elements, prefix_enc->length,
&prefix, NULL);
if (ret) {
der_free_oid(&oid);
return 0;
}
ret = 0;
if (oid.length - 1 == prefix.length) {
*suffix = oid.components[oid.length - 1];
oid.length--;
ret = (der_heim_oid_cmp(&oid, &prefix) == 0);
oid.length++;
}
der_free_oid(&oid);
der_free_oid(&prefix);
return ret;
}
static OM_uint32 inquire_sec_context_tkt_flags
(OM_uint32 *minor_status,
const gsskrb5_ctx context_handle,
gss_buffer_set_t *data_set)
{
OM_uint32 tkt_flags;
unsigned char buf[4];
gss_buffer_desc value;
HEIMDAL_MUTEX_lock(&context_handle->ctx_id_mutex);
if (context_handle->ticket == NULL) {
HEIMDAL_MUTEX_unlock(&context_handle->ctx_id_mutex);
_gsskrb5_set_status("No ticket from which to obtain flags");
*minor_status = EINVAL;
return GSS_S_BAD_MECH;
}
tkt_flags = TicketFlags2int(context_handle->ticket->ticket.flags);
HEIMDAL_MUTEX_unlock(&context_handle->ctx_id_mutex);
_gsskrb5_encode_om_uint32(tkt_flags, buf);
value.length = sizeof(buf);
value.value = buf;
return gss_add_buffer_set_member(minor_status,
&value,
data_set);
}
enum keytype { ACCEPTOR_KEY, INITIATOR_KEY, TOKEN_KEY };
static OM_uint32 inquire_sec_context_get_subkey
(OM_uint32 *minor_status,
const gsskrb5_ctx context_handle,
krb5_context context,
enum keytype keytype,
gss_buffer_set_t *data_set)
{
krb5_keyblock *key = NULL;
krb5_storage *sp = NULL;
krb5_data data;
OM_uint32 maj_stat = GSS_S_COMPLETE;
krb5_error_code ret;
krb5_data_zero(&data);
sp = krb5_storage_emem();
if (sp == NULL) {
_gsskrb5_clear_status();
ret = ENOMEM;
goto out;
}
HEIMDAL_MUTEX_lock(&context_handle->ctx_id_mutex);
switch(keytype) {
case ACCEPTOR_KEY:
ret = _gsskrb5i_get_acceptor_subkey(context_handle, context, &key);
break;
case INITIATOR_KEY:
ret = _gsskrb5i_get_initiator_subkey(context_handle, context, &key);
break;
case TOKEN_KEY:
ret = _gsskrb5i_get_token_key(context_handle, context, &key);
break;
default:
_gsskrb5_set_status("%d is not a valid subkey type", keytype);
ret = EINVAL;
break;
}
HEIMDAL_MUTEX_unlock(&context_handle->ctx_id_mutex);
if (ret)
goto out;
if (key == NULL) {
_gsskrb5_set_status("have no subkey of type %d", keytype);
ret = EINVAL;
goto out;
}
ret = krb5_store_keyblock(sp, *key);
krb5_free_keyblock (context, key);
if (ret)
goto out;
ret = krb5_storage_to_data(sp, &data);
if (ret)
goto out;
{
gss_buffer_desc value;
value.length = data.length;
value.value = data.data;
maj_stat = gss_add_buffer_set_member(minor_status,
&value,
data_set);
}
out:
krb5_data_free(&data);
if (sp)
krb5_storage_free(sp);
if (ret) {
*minor_status = ret;
maj_stat = GSS_S_FAILURE;
}
return maj_stat;
}
static OM_uint32 inquire_sec_context_authz_data
(OM_uint32 *minor_status,
const gsskrb5_ctx context_handle,
krb5_context context,
unsigned ad_type,
gss_buffer_set_t *data_set)
{
krb5_data data;
gss_buffer_desc ad_data;
OM_uint32 ret;
*minor_status = 0;
*data_set = GSS_C_NO_BUFFER_SET;
HEIMDAL_MUTEX_lock(&context_handle->ctx_id_mutex);
if (context_handle->ticket == NULL) {
HEIMDAL_MUTEX_unlock(&context_handle->ctx_id_mutex);
*minor_status = EINVAL;
_gsskrb5_set_status("No ticket to obtain authz data from");
return GSS_S_NO_CONTEXT;
}
ret = krb5_ticket_get_authorization_data_type(context,
context_handle->ticket,
ad_type,
&data);
HEIMDAL_MUTEX_unlock(&context_handle->ctx_id_mutex);
if (ret) {
*minor_status = ret;
return GSS_S_FAILURE;
}
ad_data.value = data.data;
ad_data.length = data.length;
ret = gss_add_buffer_set_member(minor_status,
&ad_data,
data_set);
krb5_data_free(&data);
return ret;
}
static OM_uint32 inquire_sec_context_has_updated_spnego
(OM_uint32 *minor_status,
const gsskrb5_ctx context_handle,
gss_buffer_set_t *data_set)
{
int is_updated = 0;
*minor_status = 0;
*data_set = GSS_C_NO_BUFFER_SET;
/*
* For Windows SPNEGO implementations, both the initiator and the
* acceptor are assumed to have been updated if a "newer" [CLAR] or
* different enctype is negotiated for use by the Kerberos GSS-API
* mechanism.
*/
HEIMDAL_MUTEX_lock(&context_handle->ctx_id_mutex);
_gsskrb5i_is_cfx(context_handle, &is_updated);
if (is_updated == 0) {
krb5_keyblock *acceptor_subkey;
if (context_handle->more_flags & LOCAL)
acceptor_subkey = context_handle->auth_context->remote_subkey;
else
acceptor_subkey = context_handle->auth_context->local_subkey;
if (acceptor_subkey != NULL)
is_updated = (acceptor_subkey->keytype !=
context_handle->auth_context->keyblock->keytype);
}
HEIMDAL_MUTEX_unlock(&context_handle->ctx_id_mutex);
return is_updated ? GSS_S_COMPLETE : GSS_S_FAILURE;
}
/*
*
*/
static OM_uint32
export_lucid_sec_context_v1(OM_uint32 *minor_status,
gsskrb5_ctx context_handle,
krb5_context context,
gss_buffer_set_t *data_set)
{
krb5_storage *sp = NULL;
OM_uint32 major_status = GSS_S_COMPLETE;
krb5_error_code ret;
krb5_keyblock *key = NULL;
int32_t number;
int is_cfx;
krb5_data data;
*minor_status = 0;
HEIMDAL_MUTEX_lock(&context_handle->ctx_id_mutex);
_gsskrb5i_is_cfx(context_handle, &is_cfx);
sp = krb5_storage_emem();
if (sp == NULL) {
_gsskrb5_clear_status();
ret = ENOMEM;
goto out;
}
ret = krb5_store_int32(sp, 1);
if (ret) goto out;
ret = krb5_store_int32(sp, (context_handle->more_flags & LOCAL) ? 1 : 0);
if (ret) goto out;
ret = krb5_store_int32(sp, context_handle->lifetime);
if (ret) goto out;
krb5_auth_con_getlocalseqnumber (context,
context_handle->auth_context,
&number);
ret = krb5_store_uint32(sp, (uint32_t)0); /* store top half as zero */
ret = krb5_store_uint32(sp, (uint32_t)number);
krb5_auth_getremoteseqnumber (context,
context_handle->auth_context,
&number);
ret = krb5_store_uint32(sp, (uint32_t)0); /* store top half as zero */
ret = krb5_store_uint32(sp, (uint32_t)number);
ret = krb5_store_int32(sp, (is_cfx) ? 1 : 0);
if (ret) goto out;
ret = _gsskrb5i_get_token_key(context_handle, context, &key);
if (ret) goto out;
if (is_cfx == 0) {
int sign_alg, seal_alg;
switch (key->keytype) {
case ETYPE_DES_CBC_CRC:
case ETYPE_DES_CBC_MD4:
case ETYPE_DES_CBC_MD5:
sign_alg = 0;
seal_alg = 0;
break;
case ETYPE_DES3_CBC_MD5:
case ETYPE_DES3_CBC_SHA1:
sign_alg = 4;
seal_alg = 2;
break;
case ETYPE_ARCFOUR_HMAC_MD5:
case ETYPE_ARCFOUR_HMAC_MD5_56:
sign_alg = 17;
seal_alg = 16;
break;
default:
sign_alg = -1;
seal_alg = -1;
break;
}
ret = krb5_store_int32(sp, sign_alg);
if (ret) goto out;
ret = krb5_store_int32(sp, seal_alg);
if (ret) goto out;
/* ctx_key */
ret = krb5_store_keyblock(sp, *key);
if (ret) goto out;
} else {
int subkey_p = (context_handle->more_flags & ACCEPTOR_SUBKEY) ? 1 : 0;
/* have_acceptor_subkey */
ret = krb5_store_int32(sp, subkey_p);
if (ret) goto out;
/* ctx_key */
ret = krb5_store_keyblock(sp, *key);
if (ret) goto out;
/* acceptor_subkey */
if (subkey_p) {
ret = krb5_store_keyblock(sp, *key);
if (ret) goto out;
}
}
ret = krb5_storage_to_data(sp, &data);
if (ret) goto out;
{
gss_buffer_desc ad_data;
ad_data.value = data.data;
ad_data.length = data.length;
ret = gss_add_buffer_set_member(minor_status, &ad_data, data_set);
krb5_data_free(&data);
if (ret)
goto out;
}
out:
if (key)
krb5_free_keyblock (context, key);
if (sp)
krb5_storage_free(sp);
if (ret) {
*minor_status = ret;
major_status = GSS_S_FAILURE;
}
HEIMDAL_MUTEX_unlock(&context_handle->ctx_id_mutex);
return major_status;
}
static OM_uint32
get_authtime(OM_uint32 *minor_status,
gsskrb5_ctx ctx,
gss_buffer_set_t *data_set)
{
gss_buffer_desc value;
unsigned char buf[4];
OM_uint32 authtime;
HEIMDAL_MUTEX_lock(&ctx->ctx_id_mutex);
if (ctx->ticket == NULL) {
HEIMDAL_MUTEX_unlock(&ctx->ctx_id_mutex);
_gsskrb5_set_status("No ticket to obtain auth time from");
*minor_status = EINVAL;
return GSS_S_FAILURE;
}
authtime = ctx->ticket->ticket.authtime;
HEIMDAL_MUTEX_unlock(&ctx->ctx_id_mutex);
_gsskrb5_encode_om_uint32(authtime, buf);
value.length = sizeof(buf);
value.value = buf;
return gss_add_buffer_set_member(minor_status,
&value,
data_set);
}
static OM_uint32
get_service_keyblock
(OM_uint32 *minor_status,
gsskrb5_ctx ctx,
gss_buffer_set_t *data_set)
{
krb5_storage *sp = NULL;
krb5_data data;
OM_uint32 maj_stat = GSS_S_COMPLETE;
krb5_error_code ret = EINVAL;
sp = krb5_storage_emem();
if (sp == NULL) {
_gsskrb5_clear_status();
*minor_status = ENOMEM;
return GSS_S_FAILURE;
}
HEIMDAL_MUTEX_lock(&ctx->ctx_id_mutex);
if (ctx->service_keyblock == NULL) {
HEIMDAL_MUTEX_unlock(&ctx->ctx_id_mutex);
_gsskrb5_set_status("No service keyblock on gssapi context");
*minor_status = EINVAL;
return GSS_S_FAILURE;
}
krb5_data_zero(&data);
ret = krb5_store_keyblock(sp, *ctx->service_keyblock);
HEIMDAL_MUTEX_unlock(&ctx->ctx_id_mutex);
if (ret)
goto out;
ret = krb5_storage_to_data(sp, &data);
if (ret)
goto out;
{
gss_buffer_desc value;
value.length = data.length;
value.value = data.data;
maj_stat = gss_add_buffer_set_member(minor_status,
&value,
data_set);
}
out:
krb5_data_free(&data);
if (sp)
krb5_storage_free(sp);
if (ret) {
*minor_status = ret;
maj_stat = GSS_S_FAILURE;
}
return maj_stat;
}
/*
*
*/
OM_uint32 _gsskrb5_inquire_sec_context_by_oid
(OM_uint32 *minor_status,
const gss_ctx_id_t context_handle,
const gss_OID desired_object,
gss_buffer_set_t *data_set)
{
krb5_context context;
const gsskrb5_ctx ctx = (const gsskrb5_ctx) context_handle;
unsigned suffix;
if (ctx == NULL) {
*minor_status = EINVAL;
return GSS_S_NO_CONTEXT;
}
GSSAPI_KRB5_INIT (&context);
if (gss_oid_equal(desired_object, GSS_KRB5_GET_TKT_FLAGS_X)) {
return inquire_sec_context_tkt_flags(minor_status,
ctx,
data_set);
} else if (gss_oid_equal(desired_object, GSS_C_PEER_HAS_UPDATED_SPNEGO)) {
return inquire_sec_context_has_updated_spnego(minor_status,
ctx,
data_set);
} else if (gss_oid_equal(desired_object, GSS_KRB5_GET_SUBKEY_X)) {
return inquire_sec_context_get_subkey(minor_status,
ctx,
context,
TOKEN_KEY,
data_set);
} else if (gss_oid_equal(desired_object, GSS_KRB5_GET_INITIATOR_SUBKEY_X)) {
return inquire_sec_context_get_subkey(minor_status,
ctx,
context,
INITIATOR_KEY,
data_set);
} else if (gss_oid_equal(desired_object, GSS_KRB5_GET_ACCEPTOR_SUBKEY_X)) {
return inquire_sec_context_get_subkey(minor_status,
ctx,
context,
ACCEPTOR_KEY,
data_set);
} else if (gss_oid_equal(desired_object, GSS_KRB5_GET_AUTHTIME_X)) {
return get_authtime(minor_status, ctx, data_set);
} else if (oid_prefix_equal(desired_object,
GSS_KRB5_EXTRACT_AUTHZ_DATA_FROM_SEC_CONTEXT_X,
&suffix)) {
return inquire_sec_context_authz_data(minor_status,
ctx,
context,
suffix,
data_set);
} else if (oid_prefix_equal(desired_object,
GSS_KRB5_EXPORT_LUCID_CONTEXT_X,
&suffix)) {
if (suffix == 1)
return export_lucid_sec_context_v1(minor_status,
ctx,
context,
data_set);
*minor_status = 0;
return GSS_S_FAILURE;
} else if (gss_oid_equal(desired_object, GSS_KRB5_GET_SERVICE_KEYBLOCK_X)) {
return get_service_keyblock(minor_status, ctx, data_set);
} else {
*minor_status = 0;
return GSS_S_FAILURE;
}
}