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244ee8ad75
Simpler logic in the caller Bug: https://bugzilla.samba.org/show_bug.cgi?id=15361 Signed-off-by: Volker Lendecke <vl@samba.org> Reviewed-by: Stefan Metzmacher <metze@samba.org>
151 lines
4.2 KiB
C
151 lines
4.2 KiB
C
/*
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Unix SMB/CIFS implementation.
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Pipe SMB reply routines
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Copyright (C) Andrew Tridgell 1992-1998
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Copyright (C) Luke Kenneth Casson Leighton 1996-1998
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Copyright (C) Paul Ashton 1997-1998.
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Copyright (C) Jeremy Allison 2005.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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/*
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This file handles reply_ calls on named pipes that the server
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makes to handle specific protocols
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*/
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#include "includes.h"
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#include "smbd/smbd.h"
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#include "smbd/globals.h"
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#include "libcli/security/security.h"
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#include "rpc_server/srv_pipe_hnd.h"
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#include "auth/auth_util.h"
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#include "librpc/rpc/dcerpc_helper.h"
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NTSTATUS open_np_file(struct smb_request *smb_req, const char *name,
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struct files_struct **pfsp)
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{
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struct smbXsrv_connection *xconn = smb_req->xconn;
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struct connection_struct *conn = smb_req->conn;
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struct files_struct *fsp;
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struct smb_filename *smb_fname = NULL;
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struct auth_session_info *session_info = conn->session_info;
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NTSTATUS status;
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status = file_new(smb_req, conn, &fsp);
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if (!NT_STATUS_IS_OK(status)) {
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DEBUG(0, ("file_new failed: %s\n", nt_errstr(status)));
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return status;
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}
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fsp->conn = conn;
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fsp_set_fd(fsp, -1);
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fsp->vuid = smb_req->vuid;
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fsp->fsp_flags.can_lock = false;
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fsp->access_mask = FILE_READ_DATA | FILE_WRITE_DATA;
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smb_fname = synthetic_smb_fname(talloc_tos(),
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name,
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NULL,
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NULL,
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0,
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0);
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if (smb_fname == NULL) {
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file_free(smb_req, fsp);
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return NT_STATUS_NO_MEMORY;
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}
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status = fsp_set_smb_fname(fsp, smb_fname);
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TALLOC_FREE(smb_fname);
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if (!NT_STATUS_IS_OK(status)) {
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file_free(smb_req, fsp);
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return status;
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}
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if (smb_req->smb2req != NULL && smb_req->smb2req->was_encrypted) {
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struct security_token *security_token = NULL;
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uint16_t dialect = xconn->smb2.server.dialect;
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uint16_t srv_smb_encrypt = DCERPC_SMB_ENCRYPTION_REQUIRED;
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uint16_t cipher = xconn->smb2.server.cipher;
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struct dom_sid smb3_sid = global_sid_Samba_SMB3;
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size_t num_smb3_sids;
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bool ok;
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session_info = copy_session_info(fsp, conn->session_info);
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if (session_info == NULL) {
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DBG_ERR("Failed to copy session info\n");
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file_free(smb_req, fsp);
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return NT_STATUS_NO_MEMORY;
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}
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security_token = session_info->security_token;
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/*
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* Security check:
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*
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* Make sure we don't have a SMB3 SID in the security token!
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*/
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num_smb3_sids = security_token_count_flag_sids(security_token,
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&smb3_sid,
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3,
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NULL);
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if (num_smb3_sids != 0) {
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DBG_ERR("ERROR: %zu SMB3 SIDs have already been "
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"detected in the security token!\n",
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num_smb3_sids);
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file_free(smb_req, fsp);
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return NT_STATUS_ACCESS_DENIED;
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}
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ok = sid_append_rid(&smb3_sid, dialect);
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ok &= sid_append_rid(&smb3_sid, srv_smb_encrypt);
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ok &= sid_append_rid(&smb3_sid, cipher);
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if (!ok) {
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DBG_ERR("sid too small\n");
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file_free(smb_req, fsp);
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return NT_STATUS_BUFFER_TOO_SMALL;
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}
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status = add_sid_to_array_unique(security_token,
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&smb3_sid,
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&security_token->sids,
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&security_token->num_sids);
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if (!NT_STATUS_IS_OK(status)) {
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DBG_ERR("Failed to add SMB3 SID to security token\n");
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file_free(smb_req, fsp);
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return status;
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}
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fsp->fsp_flags.encryption_required = true;
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}
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status = np_open(fsp, name,
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conn->sconn->remote_address,
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conn->sconn->local_address,
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session_info,
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conn->sconn->ev_ctx,
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conn->sconn->msg_ctx,
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conn->sconn->dce_ctx,
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&fsp->fake_file_handle);
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if (!NT_STATUS_IS_OK(status)) {
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DEBUG(10, ("np_open(%s) returned %s\n", name,
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nt_errstr(status)));
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file_free(smb_req, fsp);
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return status;
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}
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*pfsp = fsp;
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return NT_STATUS_OK;
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}
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