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/*
Unix SMB/CIFS implementation.
server side dcerpc authentication code - crypto support
Copyright (C) Andrew Tridgell 2004
Copyright (C) Stefan (metze) Metzmacher 2004
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
/*
this provides a crypto interface to the various backends (such as
NTLMSSP and SCHANNEL) for the rpc server code
*/
#include "includes.h"
/*
startup the cryptographic side of an authenticated dcerpc server
*/
NTSTATUS dcesrv_crypto_select_type(struct dcesrv_connection *dce_conn,
struct dcesrv_auth *auth)
{
if (auth->auth_info->auth_level != DCERPC_AUTH_LEVEL_INTEGRITY &&
auth->auth_info->auth_level != DCERPC_AUTH_LEVEL_PRIVACY) {
DEBUG(2,("auth_level %d not supported in dcesrv auth\n",
auth->auth_info->auth_level));
return NT_STATUS_INVALID_PARAMETER;
}
if (auth->crypto_ctx.ops != NULL) {
/* TODO:
* this this function should not be called
* twice per dcesrv_connection!
*
* so we need to find out the right
* dcerpc error to return
*/
}
/*
* TODO:
* maybe a dcesrv_crypto_find_backend_by_type() whould be better here
* to make thinks more generic
*/
auth->crypto_ctx.ops = dcesrv_crypto_backend_bytype(auth->auth_info->auth_type);
if (auth->crypto_ctx.ops == NULL) {
DEBUG(2,("dcesrv auth_type %d not supported\n", auth->auth_info->auth_type));
return NT_STATUS_INVALID_PARAMETER;
}
return NT_STATUS_OK;
}
/*
start crypto state
*/
NTSTATUS dcesrv_crypto_start(struct dcesrv_auth *auth, DATA_BLOB *auth_blob)
{
return auth->crypto_ctx.ops->start(auth, auth_blob);
}
/*
update crypto state
*/
NTSTATUS dcesrv_crypto_update(struct dcesrv_auth *auth,
TALLOC_CTX *out_mem_ctx,
const DATA_BLOB in, DATA_BLOB *out)
{
return auth->crypto_ctx.ops->update(auth, out_mem_ctx, in, out);
}
/*
seal a packet
*/
NTSTATUS dcesrv_crypto_seal(struct dcesrv_auth *auth, TALLOC_CTX *sig_mem_ctx,
uint8_t *data, size_t length, DATA_BLOB *sig)
{
return auth->crypto_ctx.ops->seal(auth, sig_mem_ctx, data, length, sig);
}
/*
sign a packet
*/
NTSTATUS dcesrv_crypto_sign(struct dcesrv_auth *auth, TALLOC_CTX *sig_mem_ctx,
const uint8_t *data, size_t length, DATA_BLOB *sig)
{
return auth->crypto_ctx.ops->sign(auth, sig_mem_ctx, data, length, sig);
}
/*
check a packet signature
*/
NTSTATUS dcesrv_crypto_check_sig(struct dcesrv_auth *auth, TALLOC_CTX *sig_mem_ctx,
const uint8_t *data, size_t length, const DATA_BLOB *sig)
{
return auth->crypto_ctx.ops->check_sig(auth, sig_mem_ctx, data, length, sig);
}
/*
unseal a packet
*/
NTSTATUS dcesrv_crypto_unseal(struct dcesrv_auth *auth, TALLOC_CTX *sig_mem_ctx,
uint8_t *data, size_t length, DATA_BLOB *sig)
{
return auth->crypto_ctx.ops->unseal(auth, sig_mem_ctx, data, length, sig);
}
/*
get the negotiated session key
*/
NTSTATUS dcesrv_crypto_session_key(struct dcesrv_auth *auth, uint8_t session_key[16])
{
return auth->crypto_ctx.ops->session_key(auth, session_key);
}
/*
end crypto state
*/
void dcesrv_crypto_end(struct dcesrv_auth *auth)
{
auth->crypto_ctx.ops->end(auth);
}
const struct dcesrv_crypto_ops *dcesrv_crypto_backend_bytype(uint8_t auth_type)
{
switch (auth_type) {
case DCERPC_AUTH_TYPE_SCHANNEL:
return dcesrv_crypto_schannel_get_ops();
case DCERPC_AUTH_TYPE_NTLMSSP:
return dcesrv_crypto_ntlmssp_get_ops();
}
return NULL;
}
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