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Diffstat (limited to 'source4/smb_server/smb/nttrans.c')
-rw-r--r--source4/smb_server/smb/nttrans.c518
1 files changed, 518 insertions, 0 deletions
diff --git a/source4/smb_server/smb/nttrans.c b/source4/smb_server/smb/nttrans.c
new file mode 100644
index 0000000000..215b378283
--- /dev/null
+++ b/source4/smb_server/smb/nttrans.c
@@ -0,0 +1,518 @@
+/*
+ Unix SMB/CIFS implementation.
+ NT transaction handling
+ Copyright (C) Andrew Tridgell 2003
+ Copyright (C) James J Myers 2003 <myersjj@samba.org>
+
+ 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 file handles the parsing of transact2 requests
+*/
+
+#include "includes.h"
+#include "smb_server/smb_server.h"
+#include "librpc/gen_ndr/ndr_security.h"
+
+
+
+#define CHECK_MIN_BLOB_SIZE(blob, size) do { \
+ if ((blob)->length < (size)) { \
+ return NT_STATUS_INFO_LENGTH_MISMATCH; \
+ }} while (0)
+
+
+/* setup a nttrans reply, given the data and params sizes */
+static void nttrans_setup_reply(struct smbsrv_request *req,
+ struct smb_nttrans *trans,
+ uint16_t param_size, uint16_t data_size,
+ uint16_t setup_count)
+{
+ trans->out.setup_count = setup_count;
+ if (setup_count != 0) {
+ trans->out.setup = talloc_zero_array(req, uint16_t, setup_count);
+ }
+ trans->out.params = data_blob_talloc(req, NULL, param_size);
+ trans->out.data = data_blob_talloc(req, NULL, data_size);
+}
+
+
+/*
+ parse NTTRANS_CREATE request
+ */
+static NTSTATUS nttrans_create(struct smbsrv_request *req,
+ struct smb_nttrans *trans)
+{
+ union smb_open *io;
+ uint16_t fname_len;
+ uint32_t sd_length, ea_length;
+ NTSTATUS status;
+ uint8_t *params;
+
+ if (trans->in.params.length < 54) {
+ return NT_STATUS_INVALID_PARAMETER;
+ }
+
+ /* parse the request */
+ io = talloc(req, union smb_open);
+ if (io == NULL) {
+ return NT_STATUS_NO_MEMORY;
+ }
+
+ io->ntcreatex.level = RAW_OPEN_NTTRANS_CREATE;
+
+ params = trans->in.params.data;
+
+ io->ntcreatex.in.flags = IVAL(params, 0);
+ io->ntcreatex.in.root_fid = IVAL(params, 4);
+ io->ntcreatex.in.access_mask = IVAL(params, 8);
+ io->ntcreatex.in.alloc_size = BVAL(params, 12);
+ io->ntcreatex.in.file_attr = IVAL(params, 20);
+ io->ntcreatex.in.share_access = IVAL(params, 24);
+ io->ntcreatex.in.open_disposition = IVAL(params, 28);
+ io->ntcreatex.in.create_options = IVAL(params, 32);
+ sd_length = IVAL(params, 36);
+ ea_length = IVAL(params, 40);
+ fname_len = IVAL(params, 44);
+ io->ntcreatex.in.impersonation = IVAL(params, 48);
+ io->ntcreatex.in.security_flags = CVAL(params, 52);
+ io->ntcreatex.in.sec_desc = NULL;
+ io->ntcreatex.in.ea_list = NULL;
+
+ req_pull_string(req, &io->ntcreatex.in.fname,
+ params + 54,
+ trans->in.params.length - 54,
+ STR_NO_RANGE_CHECK | STR_TERMINATE);
+ if (!io->ntcreatex.in.fname) {
+ return NT_STATUS_INVALID_PARAMETER;
+ }
+
+ if (sd_length > trans->in.data.length ||
+ ea_length > trans->in.data.length ||
+ (sd_length+ea_length) > trans->in.data.length) {
+ return NT_STATUS_INVALID_PARAMETER;
+ }
+
+ /* this call has an optional security descriptor */
+ if (sd_length != 0) {
+ DATA_BLOB blob;
+ blob.data = trans->in.data.data;
+ blob.length = sd_length;
+ io->ntcreatex.in.sec_desc = talloc(io, struct security_descriptor);
+ if (io->ntcreatex.in.sec_desc == NULL) {
+ return NT_STATUS_NO_MEMORY;
+ }
+ status = ndr_pull_struct_blob(&blob, io,
+ io->ntcreatex.in.sec_desc,
+ (ndr_pull_flags_fn_t)ndr_pull_security_descriptor);
+ if (!NT_STATUS_IS_OK(status)) {
+ return status;
+ }
+ }
+
+ /* and an optional ea_list */
+ if (ea_length > 4) {
+ DATA_BLOB blob;
+ blob.data = trans->in.data.data + sd_length;
+ blob.length = ea_length;
+ io->ntcreatex.in.ea_list = talloc(io, struct smb_ea_list);
+ if (io->ntcreatex.in.ea_list == NULL) {
+ return NT_STATUS_NO_MEMORY;
+ }
+
+ status = ea_pull_list_chained(&blob, io,
+ &io->ntcreatex.in.ea_list->num_eas,
+ &io->ntcreatex.in.ea_list->eas);
+ if (!NT_STATUS_IS_OK(status)) {
+ return status;
+ }
+ }
+
+ /* call the backend - notice that we do it sync for now, until we support
+ async nttrans requests */
+ status = ntvfs_openfile(req, io);
+ if (!NT_STATUS_IS_OK(status)) {
+ return status;
+ }
+
+ trans->out.setup_count = 0;
+ trans->out.setup = NULL;
+ trans->out.params = data_blob_talloc(req, NULL, 69);
+ trans->out.data = data_blob(NULL, 0);
+
+ params = trans->out.params.data;
+ if (params == NULL) {
+ return NT_STATUS_NO_MEMORY;
+ }
+
+ SSVAL(params, 0, io->ntcreatex.out.oplock_level);
+ SSVAL(params, 2, io->ntcreatex.out.fnum);
+ SIVAL(params, 4, io->ntcreatex.out.create_action);
+ SIVAL(params, 8, 0); /* ea error offset */
+ push_nttime(params, 12, io->ntcreatex.out.create_time);
+ push_nttime(params, 20, io->ntcreatex.out.access_time);
+ push_nttime(params, 28, io->ntcreatex.out.write_time);
+ push_nttime(params, 36, io->ntcreatex.out.change_time);
+ SIVAL(params, 44, io->ntcreatex.out.attrib);
+ SBVAL(params, 48, io->ntcreatex.out.alloc_size);
+ SBVAL(params, 56, io->ntcreatex.out.size);
+ SSVAL(params, 64, io->ntcreatex.out.file_type);
+ SSVAL(params, 66, io->ntcreatex.out.ipc_state);
+ SCVAL(params, 68, io->ntcreatex.out.is_directory);
+
+ return NT_STATUS_OK;
+}
+
+
+/*
+ parse NTTRANS_QUERY_SEC_DESC request
+ */
+static NTSTATUS nttrans_query_sec_desc(struct smbsrv_request *req,
+ struct smb_nttrans *trans)
+{
+ union smb_fileinfo *io;
+ NTSTATUS status;
+
+ if (trans->in.params.length < 8) {
+ return NT_STATUS_INVALID_PARAMETER;
+ }
+
+ /* parse the request */
+ io = talloc(req, union smb_fileinfo);
+ if (io == NULL) {
+ return NT_STATUS_NO_MEMORY;
+ }
+
+ io->query_secdesc.level = RAW_FILEINFO_SEC_DESC;
+ io->query_secdesc.in.fnum = SVAL(trans->in.params.data, 0);
+ io->query_secdesc.secinfo_flags = IVAL(trans->in.params.data, 4);
+
+ /* call the backend - notice that we do it sync for now, until we support
+ async nttrans requests */
+ status = ntvfs_qfileinfo(req, io);
+ if (!NT_STATUS_IS_OK(status)) {
+ return status;
+ }
+
+ trans->out.setup_count = 0;
+ trans->out.setup = NULL;
+ trans->out.params = data_blob_talloc(req, NULL, 4);
+ trans->out.data = data_blob(NULL, 0);
+
+ status = ndr_push_struct_blob(&trans->out.data, req,
+ io->query_secdesc.out.sd,
+ (ndr_push_flags_fn_t)ndr_push_security_descriptor);
+ if (!NT_STATUS_IS_OK(status)) {
+ return status;
+ }
+
+ SIVAL(trans->out.params.data, 0, trans->out.data.length);
+
+ return NT_STATUS_OK;
+}
+
+
+/*
+ parse NTTRANS_SET_SEC_DESC request
+ */
+static NTSTATUS nttrans_set_sec_desc(struct smbsrv_request *req,
+ struct smb_nttrans *trans)
+{
+ union smb_setfileinfo *io;
+ NTSTATUS status;
+
+ if (trans->in.params.length < 8) {
+ return NT_STATUS_INVALID_PARAMETER;
+ }
+
+ /* parse the request */
+ io = talloc(req, union smb_setfileinfo);
+ if (io == NULL) {
+ return NT_STATUS_NO_MEMORY;
+ }
+
+ io->set_secdesc.level = RAW_SFILEINFO_SEC_DESC;
+ io->set_secdesc.file.fnum = SVAL(trans->in.params.data, 0);
+ io->set_secdesc.in.secinfo_flags = IVAL(trans->in.params.data, 4);
+
+ io->set_secdesc.in.sd = talloc(io, struct security_descriptor);
+ if (io->set_secdesc.in.sd == NULL) {
+ return NT_STATUS_NO_MEMORY;
+ }
+
+ status = ndr_pull_struct_blob(&trans->in.data, req,
+ io->set_secdesc.in.sd,
+ (ndr_pull_flags_fn_t)ndr_pull_security_descriptor);
+ if (!NT_STATUS_IS_OK(status)) {
+ return status;
+ }
+
+ /* call the backend - notice that we do it sync for now, until we support
+ async nttrans requests */
+ status = ntvfs_setfileinfo(req, io);
+ if (!NT_STATUS_IS_OK(status)) {
+ return status;
+ }
+
+ trans->out.setup_count = 0;
+ trans->out.setup = NULL;
+ trans->out.params = data_blob(NULL, 0);
+ trans->out.data = data_blob(NULL, 0);
+
+ return NT_STATUS_OK;
+}
+
+
+/* parse NTTRANS_RENAME request
+ */
+static NTSTATUS nttrans_rename(struct smbsrv_request *req,
+ struct smb_nttrans *trans)
+{
+ return NT_STATUS_FOOBAR;
+}
+
+/*
+ parse NTTRANS_IOCTL request
+ */
+static NTSTATUS nttrans_ioctl(struct smbsrv_request *req,
+ struct smb_nttrans *trans)
+{
+ union smb_ioctl nt;
+ uint32_t function;
+ uint16_t fnum;
+ uint8_t filter;
+ BOOL fsctl;
+ DATA_BLOB *blob;
+
+ /* should have at least 4 setup words */
+ if (trans->in.setup_count != 4) {
+ return NT_STATUS_INVALID_PARAMETER;
+ }
+
+ function = IVAL(trans->in.setup, 0);
+ fnum = SVAL(trans->in.setup, 4);
+ fsctl = CVAL(trans->in.setup, 6);
+ filter = CVAL(trans->in.setup, 7);
+
+ blob = &trans->in.data;
+
+ nt.ntioctl.level = RAW_IOCTL_NTIOCTL;
+ nt.ntioctl.in.fnum = fnum;
+ nt.ntioctl.in.function = function;
+ nt.ntioctl.in.fsctl = fsctl;
+ nt.ntioctl.in.filter = filter;
+
+ nttrans_setup_reply(req, trans, 0, 0, 1);
+ trans->out.setup[0] = 0;
+
+ return ntvfs_ioctl(req, &nt);
+}
+
+/*
+ backend for nttrans requests
+*/
+static NTSTATUS nttrans_backend(struct smbsrv_request *req,
+ struct smb_nttrans *trans)
+{
+ /* the nttrans command is in function */
+ switch (trans->in.function) {
+ case NT_TRANSACT_CREATE:
+ return nttrans_create(req, trans);
+ case NT_TRANSACT_IOCTL:
+ return nttrans_ioctl(req, trans);
+ case NT_TRANSACT_RENAME:
+ return nttrans_rename(req, trans);
+ case NT_TRANSACT_QUERY_SECURITY_DESC:
+ return nttrans_query_sec_desc(req, trans);
+ case NT_TRANSACT_SET_SECURITY_DESC:
+ return nttrans_set_sec_desc(req, trans);
+ }
+
+ /* an unknown nttrans command */
+ return NT_STATUS_FOOBAR;
+}
+
+
+/****************************************************************************
+ Reply to an SMBnttrans request
+****************************************************************************/
+void reply_nttrans(struct smbsrv_request *req)
+{
+ struct smb_nttrans trans;
+ int i;
+ uint16_t param_ofs, data_ofs;
+ uint16_t param_count, data_count;
+ uint16_t params_left, data_left;
+ uint16_t param_total, data_total;
+ uint8_t *params, *data;
+ NTSTATUS status;
+
+ /* parse request */
+ if (req->in.wct < 19) {
+ req_reply_error(req, NT_STATUS_FOOBAR);
+ return;
+ }
+
+ trans.in.max_setup = CVAL(req->in.vwv, 0);
+ param_total = IVAL(req->in.vwv, 3);
+ data_total = IVAL(req->in.vwv, 7);
+ trans.in.max_param = IVAL(req->in.vwv, 11);
+ trans.in.max_data = IVAL(req->in.vwv, 15);
+ param_count = IVAL(req->in.vwv, 19);
+ param_ofs = IVAL(req->in.vwv, 23);
+ data_count = IVAL(req->in.vwv, 27);
+ data_ofs = IVAL(req->in.vwv, 31);
+ trans.in.setup_count = CVAL(req->in.vwv, 35);
+ trans.in.function = SVAL(req->in.vwv, 36);
+
+ if (req->in.wct != 19 + trans.in.setup_count) {
+ req_reply_dos_error(req, ERRSRV, ERRerror);
+ return;
+ }
+
+ /* parse out the setup words */
+ trans.in.setup = talloc_array(req, uint16_t, trans.in.setup_count);
+ if (!trans.in.setup) {
+ req_reply_error(req, NT_STATUS_NO_MEMORY);
+ return;
+ }
+ for (i=0;i<trans.in.setup_count;i++) {
+ trans.in.setup[i] = SVAL(req->in.vwv, VWV(19+i));
+ }
+
+ if (!req_pull_blob(req, req->in.hdr + param_ofs, param_count, &trans.in.params) ||
+ !req_pull_blob(req, req->in.hdr + data_ofs, data_count, &trans.in.data)) {
+ req_reply_error(req, NT_STATUS_FOOBAR);
+ return;
+ }
+
+ /* is it a partial request? if so, then send a 'send more' message */
+ if (param_total > param_count ||
+ data_total > data_count) {
+ DEBUG(0,("REWRITE: not handling partial nttrans requests!\n"));
+ return;
+ }
+
+ /* its a full request, give it to the backend */
+ status = nttrans_backend(req, &trans);
+
+ if (NT_STATUS_IS_ERR(status)) {
+ req_reply_error(req, status);
+ return;
+ }
+
+#if 0
+ /* w2k3 does not check the max_setup count */
+ if (trans.out.setup_count > trans.in.max_setup) {
+ req_reply_error(req, NT_STATUS_BUFFER_TOO_SMALL);
+ return;
+ }
+#endif
+ if (trans.out.params.length > trans.in.max_param) {
+ status = NT_STATUS_BUFFER_TOO_SMALL;
+ trans.out.params.length = trans.in.max_param;
+ }
+ if (trans.out.data.length > trans.in.max_data) {
+ status = NT_STATUS_BUFFER_TOO_SMALL;
+ trans.out.data.length = trans.in.max_data;
+ }
+
+ params_left = trans.out.params.length;
+ data_left = trans.out.data.length;
+ params = trans.out.params.data;
+ data = trans.out.data.data;
+
+ req_setup_reply(req, 18 + trans.out.setup_count, 0);
+
+ if (!NT_STATUS_IS_OK(status)) {
+ req_setup_error(req, status);
+ }
+
+ /* we need to divide up the reply into chunks that fit into
+ the negotiated buffer size */
+ do {
+ uint16_t this_data, this_param, max_bytes;
+ uint_t align1 = 1, align2 = (params_left ? 2 : 0);
+ struct smbsrv_request *this_req;
+
+ max_bytes = req_max_data(req) - (align1 + align2);
+
+ this_param = params_left;
+ if (this_param > max_bytes) {
+ this_param = max_bytes;
+ }
+ max_bytes -= this_param;
+
+ this_data = data_left;
+ if (this_data > max_bytes) {
+ this_data = max_bytes;
+ }
+
+ /* don't destroy unless this is the last chunk */
+ if (params_left - this_param != 0 ||
+ data_left - this_data != 0) {
+ this_req = req_setup_secondary(req);
+ } else {
+ this_req = req;
+ }
+
+ req_grow_data(req, this_param + this_data + (align1 + align2));
+
+ SSVAL(this_req->out.vwv, 0, 0); /* reserved */
+ SCVAL(this_req->out.vwv, 2, 0); /* reserved */
+ SIVAL(this_req->out.vwv, 3, trans.out.params.length);
+ SIVAL(this_req->out.vwv, 7, trans.out.data.length);
+
+ SIVAL(this_req->out.vwv, 11, this_param);
+ SIVAL(this_req->out.vwv, 15, align1 + PTR_DIFF(this_req->out.data, this_req->out.hdr));
+ SIVAL(this_req->out.vwv, 19, PTR_DIFF(params, trans.out.params.data));
+
+ SIVAL(this_req->out.vwv, 23, this_data);
+ SIVAL(this_req->out.vwv, 27, align1 + align2 +
+ PTR_DIFF(this_req->out.data + this_param, this_req->out.hdr));
+ SIVAL(this_req->out.vwv, 31, PTR_DIFF(data, trans.out.data.data));
+
+ SCVAL(this_req->out.vwv, 35, trans.out.setup_count);
+ for (i=0;i<trans.out.setup_count;i++) {
+ SSVAL(this_req->out.vwv, VWV(18+i), trans.out.setup[i]);
+ }
+
+ memset(this_req->out.data, 0, align1);
+ if (this_param != 0) {
+ memcpy(this_req->out.data + align1, params, this_param);
+ }
+ memset(this_req->out.data+this_param+align1, 0, align2);
+ if (this_data != 0) {
+ memcpy(this_req->out.data+this_param+align1+align2,
+ data, this_data);
+ }
+
+ params_left -= this_param;
+ data_left -= this_data;
+ params += this_param;
+ data += this_data;
+
+ req_send_reply(this_req);
+ } while (params_left != 0 || data_left != 0);
+}
+
+
+/****************************************************************************
+ Reply to an SMBnttranss request
+****************************************************************************/
+void reply_nttranss(struct smbsrv_request *req)
+{
+ req_reply_error(req, NT_STATUS_FOOBAR);
+}