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/*
* Copyright (c) 2010 Kungliga Tekniska Högskolan
* (Royal Institute of Technology, Stockholm, Sweden).
* All rights reserved.
*
* Portions Copyright (c) 2010 Apple Inc. 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 the Institute 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 THE INSTITUTE 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 THE INSTITUTE 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 "netlogon.h"
#include <gssapi_spi.h>
OM_uint32
_netlogon_acquire_cred(OM_uint32 * min_stat,
gss_const_name_t desired_name,
OM_uint32 time_req,
const gss_OID_set desired_mechs,
gss_cred_usage_t cred_usage,
gss_cred_id_t * output_cred_handle,
gss_OID_set * actual_mechs,
OM_uint32 * time_rec)
{
OM_uint32 ret;
gssnetlogon_cred cred;
/* only initiator support so far */
if (cred_usage != GSS_C_INITIATE)
return GSS_S_FAILURE;
if (desired_name == GSS_C_NO_NAME)
return GSS_S_BAD_NAME;
cred = (gssnetlogon_cred)calloc(1, sizeof(*cred));
if (cred == NULL) {
*min_stat = ENOMEM;
return GSS_S_FAILURE;
}
cred->SignatureAlgorithm = NL_SIGN_ALG_HMAC_MD5;
cred->SealAlgorithm = NL_SEAL_ALG_RC4;
ret = _netlogon_duplicate_name(min_stat, desired_name,
(gss_name_t *)&cred->Name);
if (GSS_ERROR(ret)) {
free(cred);
return ret;
}
*output_cred_handle = (gss_cred_id_t)cred;
if (actual_mechs != NULL)
*actual_mechs = GSS_C_NO_OID_SET;
if (time_rec != NULL)
*time_rec = GSS_C_INDEFINITE;
return GSS_S_COMPLETE;
}
OM_uint32
_netlogon_acquire_cred_ex(gss_status_id_t status,
gss_const_name_t desired_name,
OM_uint32 flags,
OM_uint32 time_req,
gss_cred_usage_t cred_usage,
gss_auth_identity_t identity,
void *ctx,
void (*complete)(void *, OM_uint32, gss_status_id_t, gss_cred_id_t, OM_uint32))
{
return GSS_S_UNAVAILABLE;
}
/*
* value contains 16 byte session key
*/
static OM_uint32
_netlogon_set_session_key(OM_uint32 *minor_status,
gss_cred_id_t *cred_handle,
const gss_buffer_t value)
{
gssnetlogon_cred cred;
if (*cred_handle == GSS_C_NO_CREDENTIAL) {
*minor_status = EINVAL;
return GSS_S_FAILURE;
}
cred = (gssnetlogon_cred)*cred_handle;
if (value->length != sizeof(cred->SessionKey)) {
*minor_status = ERANGE;
return GSS_S_FAILURE;
}
memcpy(cred->SessionKey, value->value, value->length);
*minor_status = 0;
return GSS_S_COMPLETE;
}
/*
* value contains 16 bit little endian encoded seal algorithm
*/
static OM_uint32
_netlogon_set_sign_algorithm(OM_uint32 *minor_status,
gss_cred_id_t *cred_handle,
const gss_buffer_t value)
{
gssnetlogon_cred cred;
uint16_t alg;
const uint8_t *p;
if (*cred_handle == GSS_C_NO_CREDENTIAL) {
*minor_status = EINVAL;
return GSS_S_FAILURE;
}
cred = (gssnetlogon_cred)*cred_handle;
if (value->length != 2) {
*minor_status = ERANGE;
return GSS_S_FAILURE;
}
p = (const uint8_t *)value->value;
alg = (p[0] << 0) | (p[1] << 8);
if (alg != NL_SIGN_ALG_HMAC_MD5 && alg != NL_SIGN_ALG_SHA256) {
*minor_status = EINVAL;
return GSS_S_FAILURE;
}
cred->SignatureAlgorithm = alg;
if (alg == NL_SIGN_ALG_SHA256)
cred->SealAlgorithm = NL_SEAL_ALG_AES128;
else
cred->SealAlgorithm = NL_SEAL_ALG_RC4;
*minor_status = 0;
return GSS_S_COMPLETE;
}
OM_uint32
_netlogon_set_cred_option
(OM_uint32 *minor_status,
gss_cred_id_t *cred_handle,
const gss_OID desired_object,
const gss_buffer_t value)
{
if (value == GSS_C_NO_BUFFER) {
*minor_status = EINVAL;
return GSS_S_FAILURE;
}
if (gss_oid_equal(desired_object, GSS_NETLOGON_SET_SESSION_KEY_X))
return _netlogon_set_session_key(minor_status, cred_handle, value);
else if (gss_oid_equal(desired_object, GSS_NETLOGON_SET_SIGN_ALGORITHM_X))
return _netlogon_set_sign_algorithm(minor_status, cred_handle, value);
*minor_status = EINVAL;
return GSS_S_FAILURE;
}
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