s3:smbd: implement a simple version of SMB2 Create

It only work on file shares and
just ignores any additional Create Context Values.

metze

1 files changed, 274 insertions, 0 deletions

diff --git a/source3/smbd/smb2_create.c b/source3/smbd/smb2_create.c
new file mode 100644
index 0000000000..8cd0c3bb38
--- /dev/null
+++ b/source3/smbd/smb2_create.c
@@ -0,0 +1,274 @@
+/*
+   Unix SMB/CIFS implementation.
+   Core SMB2 server
+
+   Copyright (C) Stefan Metzmacher 2009
+
+   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 3 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, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "includes.h"
+#include "smbd/globals.h"
+#include "../source4/libcli/smb2/smb2_constants.h"
+
+static NTSTATUS smbd_smb2_create(struct smbd_smb2_request *req,
+				 uint8_t in_oplock_level,
+				 uint32_t in_impersonation_level,
+				 uint32_t in_desired_access,
+				 uint32_t in_file_attributes,
+				 uint32_t in_share_access,
+				 uint32_t in_create_disposition,
+				 uint32_t in_create_options,
+				 const char *in_name,
+				 uint8_t *out_oplock_level,
+				 uint32_t *out_create_action,
+				 NTTIME *out_creation_time,
+				 NTTIME *out_last_access_time,
+				 NTTIME *out_last_write_time,
+				 NTTIME *out_change_time,
+				 uint64_t *out_allocation_size,
+				 uint64_t *out_end_of_file,
+				 uint32_t *out_file_attributes,
+				 uint64_t *out_file_id_volatile);
+
+NTSTATUS smbd_smb2_request_process_create(struct smbd_smb2_request *req)
+{
+	const uint8_t *inbody;
+	int i = req->current_idx;
+	uint8_t *outhdr;
+	DATA_BLOB outbody;
+	DATA_BLOB outdyn;
+	size_t expected_body_size = 0x39;
+	size_t body_size;
+	uint8_t in_oplock_level;
+	uint32_t in_impersonation_level;
+	uint32_t in_desired_access;
+	uint32_t in_file_attributes;
+	uint32_t in_share_access;
+	uint32_t in_create_disposition;
+	uint32_t in_create_options;
+	uint16_t in_name_offset;
+	uint16_t in_name_length;
+	DATA_BLOB in_name_buffer;
+	char *in_name_string;
+	size_t in_name_string_size;
+	uint8_t out_oplock_level;
+	uint32_t out_create_action;
+	NTTIME out_creation_time;
+	NTTIME out_last_access_time;
+	NTTIME out_last_write_time;
+	NTTIME out_change_time;
+	uint64_t out_allocation_size;
+	uint64_t out_end_of_file;
+	uint32_t out_file_attributes;
+	uint64_t out_file_id_volatile;
+	NTSTATUS status;
+	bool ok;
+
+	if (req->in.vector[i+1].iov_len != (expected_body_size & 0xFFFFFFFE)) {
+		return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
+	}
+
+	inbody = (const uint8_t *)req->in.vector[i+1].iov_base;
+
+	body_size = SVAL(inbody, 0x00);
+	if (body_size != expected_body_size) {
+		return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
+	}
+
+	in_oplock_level		= CVAL(inbody, 0x03);
+	in_impersonation_level	= IVAL(inbody, 0x04);
+	in_desired_access	= IVAL(inbody, 0x18);
+	in_file_attributes	= IVAL(inbody, 0x1C);
+	in_share_access		= IVAL(inbody, 0x20);
+	in_create_disposition	= IVAL(inbody, 0x24);
+	in_create_options	= IVAL(inbody, 0x28);
+	in_name_offset		= SVAL(inbody, 0x2C);
+	in_name_length		= SVAL(inbody, 0x2E);
+
+	if (in_name_offset != (SMB2_HDR_BODY + (body_size & 0xFFFFFFFE))) {
+		return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
+	}
+
+	if (in_name_length > req->in.vector[i+2].iov_len) {
+		return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
+	}
+
+	in_name_buffer.data = (uint8_t *)req->in.vector[i+2].iov_base;
+	in_name_buffer.length = in_name_length;
+
+	ok = convert_string_talloc(req, CH_UTF16, CH_UNIX,
+				   in_name_buffer.data,
+				   in_name_buffer.length,
+				   &in_name_string,
+				   &in_name_string_size, false);
+	if (!ok) {
+		return smbd_smb2_request_error(req, NT_STATUS_ILLEGAL_CHARACTER);
+	}
+
+	status = smbd_smb2_create(req,
+				  in_oplock_level,
+				  in_impersonation_level,
+				  in_desired_access,
+				  in_file_attributes,
+				  in_share_access,
+				  in_create_disposition,
+				  in_create_options,
+				  in_name_string,
+				  &out_oplock_level,
+				  &out_create_action,
+				  &out_creation_time,
+				  &out_last_access_time,
+				  &out_last_write_time,
+				  &out_change_time,
+				  &out_allocation_size,
+				  &out_end_of_file,
+				  &out_file_attributes,
+				  &out_file_id_volatile);
+	if (!NT_STATUS_IS_OK(status)) {
+		return smbd_smb2_request_error(req, status);
+	}
+
+	outhdr = (uint8_t *)req->out.vector[i].iov_base;
+
+	outbody = data_blob_talloc(req->out.vector, NULL, 0x58);
+	if (outbody.data == NULL) {
+		return smbd_smb2_request_error(req, NT_STATUS_NO_MEMORY);
+	}
+
+	SSVAL(outbody.data, 0x00, 0x58 + 1);	/* struct size */
+	SCVAL(outbody.data, 0x02,
+	      out_oplock_level);		/* oplock level */
+	SCVAL(outbody.data, 0x03, 0);		/* reserved */
+	SIVAL(outbody.data, 0x04,
+	      out_create_action);		/* create action */
+	SBVAL(outbody.data, 0x08,
+	      out_creation_time);		/* creation time */
+	SBVAL(outbody.data, 0x10,
+	      out_last_access_time);		/* last access time */
+	SBVAL(outbody.data, 0x18,
+	      out_last_write_time);		/* last write time */
+	SBVAL(outbody.data, 0x20,
+	      out_change_time);			/* change time */
+	SBVAL(outbody.data, 0x28,
+	      out_allocation_size);		/* allocation size */
+	SBVAL(outbody.data, 0x30,
+	      out_end_of_file);			/* end of file */
+	SIVAL(outbody.data, 0x38,
+	      out_file_attributes);		/* file attributes */
+	SIVAL(outbody.data, 0x3C, 0);		/* reserved */
+	SBVAL(outbody.data, 0x40, 0);		/* file id (persistent) */
+	SBVAL(outbody.data, 0x48,
+	      out_file_id_volatile);		/* file id (volatile) */
+	SIVAL(outbody.data, 0x50, 0);		/* create contexts offset */
+	SIVAL(outbody.data, 0x54, 0);		/* create contexts length */
+
+	outdyn = data_blob_const(NULL, 0);
+
+	return smbd_smb2_request_done(req, outbody, &outdyn);
+}
+
+static NTSTATUS smbd_smb2_create(struct smbd_smb2_request *req,
+				 uint8_t in_oplock_level,
+				 uint32_t in_impersonation_level,
+				 uint32_t in_desired_access,
+				 uint32_t in_file_attributes,
+				 uint32_t in_share_access,
+				 uint32_t in_create_disposition,
+				 uint32_t in_create_options,
+				 const char *in_name,
+				 uint8_t *out_oplock_level,
+				 uint32_t *out_create_action,
+				 NTTIME *out_creation_time,
+				 NTTIME *out_last_access_time,
+				 NTTIME *out_last_write_time,
+				 NTTIME *out_change_time,
+				 uint64_t *out_allocation_size,
+				 uint64_t *out_end_of_file,
+				 uint32_t *out_file_attributes,
+				 uint64_t *out_file_id_volatile)
+{
+	NTSTATUS status;
+	struct smb_request *smbreq;
+	files_struct *result;
+	int info;
+	SMB_STRUCT_STAT sbuf;
+
+	DEBUG(10,("smbd_smb2_create: name[%s]\n",
+		  in_name));
+
+	smbreq = smbd_smb2_fake_smb_request(req);
+	if (smbreq == NULL) {
+		return NT_STATUS_NO_MEMORY;
+	}
+
+	/* If it's an IPC, pass off the pipe handler. */
+	if (IS_IPC(req->tcon->compat_conn)) {
+		return NT_STATUS_NOT_IMPLEMENTED;
+	}
+
+	if (CAN_PRINT(req->tcon->compat_conn)) {
+		return NT_STATUS_NOT_IMPLEMENTED;
+	}
+
+	switch (in_oplock_level) {
+	case SMB2_OPLOCK_LEVEL_BATCH:
+		break;
+	case SMB2_OPLOCK_LEVEL_EXCLUSIVE:
+		break;
+	default:
+		break;
+	}
+
+	status = SMB_VFS_CREATE_FILE(req->tcon->compat_conn,
+				     smbreq,
+				     0, /* root_dir_fid */
+				     in_name,
+				     CFF_DOS_PATH, /* create_file_flags */
+				     in_desired_access,
+				     in_share_access,
+				     in_create_disposition,
+				     in_create_options,
+				     in_file_attributes,
+				     0, /* oplock_request */
+				     0, /* allocation_size */
+				     NULL, /* security_descriptor */
+				     NULL, /* ea_list */
+				     &result,
+				     &info,
+				     &sbuf);
+	if (!NT_STATUS_IS_OK(status)) {
+		return status;
+	}
+
+	*out_oplock_level	= 0;
+	if ((in_create_disposition == FILE_SUPERSEDE)
+	    && (info == FILE_WAS_OVERWRITTEN)) {
+		*out_create_action = FILE_WAS_SUPERSEDED;
+	} else {
+		*out_create_action = info;
+	}
+	unix_timespec_to_nt_time(out_creation_time, sbuf.st_ex_btime);
+	unix_timespec_to_nt_time(out_last_access_time, sbuf.st_ex_atime);
+	unix_timespec_to_nt_time(out_last_write_time,sbuf.st_ex_mtime);
+	unix_timespec_to_nt_time(out_change_time, sbuf.st_ex_ctime);
+	*out_allocation_size	= sbuf.st_ex_blksize * sbuf.st_ex_blocks;
+	*out_end_of_file	= sbuf.st_ex_size;
+	*out_file_attributes	= dos_mode(result->conn,result->fsp_name,&sbuf);
+	if (*out_file_attributes == 0) {
+		*out_file_attributes = FILE_ATTRIBUTE_NORMAL;
+	}
+	*out_file_id_volatile = result->fnum;
+	return NT_STATUS_OK;
+}