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-rw-r--r--source4/libcli/smb2/create.c419
1 files changed, 419 insertions, 0 deletions
diff --git a/source4/libcli/smb2/create.c b/source4/libcli/smb2/create.c
new file mode 100644
index 0000000000..8a40e56a00
--- /dev/null
+++ b/source4/libcli/smb2/create.c
@@ -0,0 +1,419 @@
+/*
+ Unix SMB/CIFS implementation.
+
+ SMB2 client tree handling
+
+ Copyright (C) Andrew Tridgell 2005
+
+ 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 "libcli/raw/libcliraw.h"
+#include "libcli/raw/raw_proto.h"
+#include "libcli/smb2/smb2.h"
+#include "libcli/smb2/smb2_calls.h"
+#include "librpc/gen_ndr/ndr_security.h"
+
+
+/*
+ parse a set of SMB2 create blobs
+*/
+NTSTATUS smb2_create_blob_parse(TALLOC_CTX *mem_ctx, const DATA_BLOB buffer,
+ struct smb2_create_blobs *blobs)
+{
+ const uint8_t *data = buffer.data;
+ uint32_t remaining = buffer.length;
+
+ while (remaining > 0) {
+ uint32_t next;
+ uint32_t name_offset, name_length;
+ uint32_t reserved, data_offset;
+ uint32_t data_length;
+ char *tag;
+ DATA_BLOB b;
+ NTSTATUS status;
+
+ if (remaining < 16) {
+ return NT_STATUS_INVALID_PARAMETER;
+ }
+ next = IVAL(data, 0);
+ name_offset = SVAL(data, 4);
+ name_length = SVAL(data, 6);
+ reserved = SVAL(data, 8);
+ data_offset = SVAL(data, 10);
+ data_length = IVAL(data, 12);
+
+ if ((next & 0x7) != 0 ||
+ next > remaining ||
+ name_offset < 16 ||
+ name_offset > remaining ||
+ name_length != 4 || /* windows enforces this */
+ name_offset + name_length > remaining ||
+ data_offset < name_offset + name_length ||
+ data_offset > remaining ||
+ data_offset + (uint64_t)data_length > remaining) {
+ return NT_STATUS_INVALID_PARAMETER;
+ }
+
+ tag = talloc_strndup(mem_ctx, (const char *)data + name_offset, name_length);
+ if (tag == NULL) {
+ return NT_STATUS_NO_MEMORY;
+ }
+
+ b = data_blob_const(data+data_offset, data_length);
+ status = smb2_create_blob_add(mem_ctx, blobs, tag, b);
+ if (!NT_STATUS_IS_OK(status)) {
+ return status;
+ }
+
+ talloc_free(tag);
+
+ if (next == 0) break;
+
+ remaining -= next;
+ data += next;
+
+ if (remaining < 16) {
+ return NT_STATUS_INVALID_PARAMETER;
+ }
+ }
+
+ return NT_STATUS_OK;
+}
+
+
+/*
+ add a blob to a smb2_create attribute blob
+*/
+static NTSTATUS smb2_create_blob_push_one(TALLOC_CTX *mem_ctx, DATA_BLOB *buffer,
+ const struct smb2_create_blob *blob,
+ bool last)
+{
+ uint32_t ofs = buffer->length;
+ size_t tag_length = strlen(blob->tag);
+ uint8_t pad = smb2_padding_size(blob->data.length+tag_length, 4);
+
+ if (!data_blob_realloc(mem_ctx, buffer,
+ buffer->length + 0x14 + tag_length + blob->data.length + pad))
+ return NT_STATUS_NO_MEMORY;
+
+ if (last) {
+ SIVAL(buffer->data, ofs+0x00, 0);
+ } else {
+ SIVAL(buffer->data, ofs+0x00, 0x14 + tag_length + blob->data.length + pad);
+ }
+ SSVAL(buffer->data, ofs+0x04, 0x10); /* offset of tag */
+ SIVAL(buffer->data, ofs+0x06, tag_length); /* tag length */
+ SSVAL(buffer->data, ofs+0x0A, 0x14 + tag_length); /* offset of data */
+ SIVAL(buffer->data, ofs+0x0C, blob->data.length);
+ memcpy(buffer->data+ofs+0x10, blob->tag, tag_length);
+ SIVAL(buffer->data, ofs+0x10+tag_length, 0); /* pad? */
+ memcpy(buffer->data+ofs+0x14+tag_length, blob->data.data, blob->data.length);
+ memset(buffer->data+ofs+0x14+tag_length+blob->data.length, 0, pad);
+
+ return NT_STATUS_OK;
+}
+
+
+/*
+ create a buffer of a set of create blobs
+*/
+NTSTATUS smb2_create_blob_push(TALLOC_CTX *mem_ctx, DATA_BLOB *buffer,
+ const struct smb2_create_blobs blobs)
+{
+ int i;
+ NTSTATUS status;
+
+ *buffer = data_blob(NULL, 0);
+ for (i=0; i < blobs.num_blobs; i++) {
+ bool last = false;
+ const struct smb2_create_blob *c;
+
+ if ((i + 1) == blobs.num_blobs) {
+ last = true;
+ }
+
+ c = &blobs.blobs[i];
+ status = smb2_create_blob_push_one(mem_ctx, buffer, c, last);
+ if (!NT_STATUS_IS_OK(status)) {
+ return status;
+ }
+ }
+ return NT_STATUS_OK;
+}
+
+
+NTSTATUS smb2_create_blob_add(TALLOC_CTX *mem_ctx, struct smb2_create_blobs *b,
+ const char *tag, DATA_BLOB data)
+{
+ struct smb2_create_blob *array;
+
+ array = talloc_realloc(mem_ctx, b->blobs,
+ struct smb2_create_blob,
+ b->num_blobs + 1);
+ NT_STATUS_HAVE_NO_MEMORY(array);
+ b->blobs = array;
+
+ b->blobs[b->num_blobs].tag = talloc_strdup(b->blobs, tag);
+ NT_STATUS_HAVE_NO_MEMORY(b->blobs[b->num_blobs].tag);
+
+ if (data.data) {
+ b->blobs[b->num_blobs].data = data_blob_talloc(b->blobs,
+ data.data,
+ data.length);
+ NT_STATUS_HAVE_NO_MEMORY(b->blobs[b->num_blobs].data.data);
+ } else {
+ b->blobs[b->num_blobs].data = data_blob(NULL, 0);
+ }
+
+ b->num_blobs += 1;
+
+ return NT_STATUS_OK;
+}
+
+/*
+ send a create request
+*/
+struct smb2_request *smb2_create_send(struct smb2_tree *tree, struct smb2_create *io)
+{
+ struct smb2_request *req;
+ NTSTATUS status;
+ DATA_BLOB blob;
+ struct smb2_create_blobs blobs;
+ int i;
+
+ ZERO_STRUCT(blobs);
+
+ req = smb2_request_init_tree(tree, SMB2_OP_CREATE, 0x38, true, 0);
+ if (req == NULL) return NULL;
+
+ SCVAL(req->out.body, 0x02, io->in.security_flags);
+ SCVAL(req->out.body, 0x03, io->in.oplock_level);
+ SIVAL(req->out.body, 0x04, io->in.impersonation_level);
+ SBVAL(req->out.body, 0x08, io->in.create_flags);
+ SBVAL(req->out.body, 0x10, io->in.reserved);
+ SIVAL(req->out.body, 0x18, io->in.desired_access);
+ SIVAL(req->out.body, 0x1C, io->in.file_attributes);
+ SIVAL(req->out.body, 0x20, io->in.share_access);
+ SIVAL(req->out.body, 0x24, io->in.create_disposition);
+ SIVAL(req->out.body, 0x28, io->in.create_options);
+
+ status = smb2_push_o16s16_string(&req->out, 0x2C, io->in.fname);
+ if (!NT_STATUS_IS_OK(status)) {
+ talloc_free(req);
+ return NULL;
+ }
+
+ /* now add all the optional blobs */
+ if (io->in.eas.num_eas != 0) {
+ DATA_BLOB b = data_blob_talloc(req, NULL,
+ ea_list_size_chained(io->in.eas.num_eas, io->in.eas.eas, 4));
+ ea_put_list_chained(b.data, io->in.eas.num_eas, io->in.eas.eas, 4);
+ status = smb2_create_blob_add(req, &blobs,
+ SMB2_CREATE_TAG_EXTA, b);
+ if (!NT_STATUS_IS_OK(status)) {
+ talloc_free(req);
+ return NULL;
+ }
+ data_blob_free(&b);
+ }
+
+ /* an empty MxAc tag seems to be used to ask the server to
+ return the maximum access mask allowed on the file */
+ if (io->in.query_maximal_access) {
+ /* TODO: MS-SMB2 2.2.13.2.5 says this can contain a timestamp? What to do
+ with that if it doesn't match? */
+ status = smb2_create_blob_add(req, &blobs,
+ SMB2_CREATE_TAG_MXAC, data_blob(NULL, 0));
+ if (!NT_STATUS_IS_OK(status)) {
+ talloc_free(req);
+ return NULL;
+ }
+ }
+
+ if (io->in.alloc_size != 0) {
+ uint8_t data[8];
+ SBVAL(data, 0, io->in.alloc_size);
+ status = smb2_create_blob_add(req, &blobs,
+ SMB2_CREATE_TAG_ALSI, data_blob_const(data, 8));
+ if (!NT_STATUS_IS_OK(status)) {
+ talloc_free(req);
+ return NULL;
+ }
+ }
+
+ if (io->in.durable_open) {
+ status = smb2_create_blob_add(req, &blobs,
+ SMB2_CREATE_TAG_DHNQ, data_blob_talloc_zero(req, 16));
+ if (!NT_STATUS_IS_OK(status)) {
+ talloc_free(req);
+ return NULL;
+ }
+ }
+
+ if (io->in.durable_handle) {
+ uint8_t data[16];
+ smb2_push_handle(data, io->in.durable_handle);
+ status = smb2_create_blob_add(req, &blobs,
+ SMB2_CREATE_TAG_DHNC, data_blob_const(data, 16));
+ if (!NT_STATUS_IS_OK(status)) {
+ talloc_free(req);
+ return NULL;
+ }
+ }
+
+ if (io->in.timewarp) {
+ uint8_t data[8];
+ SBVAL(data, 0, io->in.timewarp);
+ status = smb2_create_blob_add(req, &blobs,
+ SMB2_CREATE_TAG_TWRP, data_blob_const(data, 8));
+ if (!NT_STATUS_IS_OK(status)) {
+ talloc_free(req);
+ return NULL;
+ }
+ }
+
+ if (io->in.sec_desc) {
+ enum ndr_err_code ndr_err;
+ DATA_BLOB sd_blob;
+ ndr_err = ndr_push_struct_blob(&sd_blob, req, NULL,
+ io->in.sec_desc,
+ (ndr_push_flags_fn_t)ndr_push_security_descriptor);
+ if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
+ talloc_free(req);
+ return NULL;
+ }
+ status = smb2_create_blob_add(req, &blobs,
+ SMB2_CREATE_TAG_SECD, sd_blob);
+ if (!NT_STATUS_IS_OK(status)) {
+ talloc_free(req);
+ return NULL;
+ }
+ }
+
+ if (io->in.query_on_disk_id) {
+ status = smb2_create_blob_add(req, &blobs,
+ SMB2_CREATE_TAG_QFID, data_blob(NULL, 0));
+ if (!NT_STATUS_IS_OK(status)) {
+ talloc_free(req);
+ return NULL;
+ }
+ }
+
+ /* and any custom blobs */
+ for (i=0;i<io->in.blobs.num_blobs;i++) {
+ status = smb2_create_blob_add(req, &blobs,
+ io->in.blobs.blobs[i].tag,
+ io->in.blobs.blobs[i].data);
+ if (!NT_STATUS_IS_OK(status)) {
+ talloc_free(req);
+ return NULL;
+ }
+ }
+
+
+ status = smb2_create_blob_push(req, &blob, blobs);
+ if (!NT_STATUS_IS_OK(status)) {
+ talloc_free(req);
+ return NULL;
+ }
+
+ status = smb2_push_o32s32_blob(&req->out, 0x30, blob);
+ if (!NT_STATUS_IS_OK(status)) {
+ talloc_free(req);
+ return NULL;
+ }
+
+ data_blob_free(&blob);
+
+ smb2_transport_send(req);
+
+ return req;
+}
+
+
+/*
+ recv a create reply
+*/
+NTSTATUS smb2_create_recv(struct smb2_request *req, TALLOC_CTX *mem_ctx, struct smb2_create *io)
+{
+ NTSTATUS status;
+ DATA_BLOB blob;
+ int i;
+
+ if (!smb2_request_receive(req) ||
+ !smb2_request_is_ok(req)) {
+ return smb2_request_destroy(req);
+ }
+
+ SMB2_CHECK_PACKET_RECV(req, 0x58, true);
+ ZERO_STRUCT(io->out);
+ io->out.oplock_level = CVAL(req->in.body, 0x02);
+ io->out.reserved = CVAL(req->in.body, 0x03);
+ io->out.create_action = IVAL(req->in.body, 0x04);
+ io->out.create_time = smbcli_pull_nttime(req->in.body, 0x08);
+ io->out.access_time = smbcli_pull_nttime(req->in.body, 0x10);
+ io->out.write_time = smbcli_pull_nttime(req->in.body, 0x18);
+ io->out.change_time = smbcli_pull_nttime(req->in.body, 0x20);
+ io->out.alloc_size = BVAL(req->in.body, 0x28);
+ io->out.size = BVAL(req->in.body, 0x30);
+ io->out.file_attr = IVAL(req->in.body, 0x38);
+ io->out.reserved2 = IVAL(req->in.body, 0x3C);
+ smb2_pull_handle(req->in.body+0x40, &io->out.file.handle);
+ status = smb2_pull_o32s32_blob(&req->in, mem_ctx, req->in.body+0x50, &blob);
+ if (!NT_STATUS_IS_OK(status)) {
+ smb2_request_destroy(req);
+ return status;
+ }
+
+ status = smb2_create_blob_parse(mem_ctx, blob, &io->out.blobs);
+ if (!NT_STATUS_IS_OK(status)) {
+ smb2_request_destroy(req);
+ return status;
+ }
+
+ /* pull out the parsed blobs */
+ for (i=0;i<io->out.blobs.num_blobs;i++) {
+ if (strcmp(io->out.blobs.blobs[i].tag, SMB2_CREATE_TAG_MXAC) == 0) {
+ /* TODO: this also contains a status field in
+ first 4 bytes */
+ if (io->out.blobs.blobs[i].data.length != 8) {
+ smb2_request_destroy(req);
+ return NT_STATUS_INVALID_NETWORK_RESPONSE;
+ }
+ io->out.maximal_access = IVAL(io->out.blobs.blobs[i].data.data, 4);
+ }
+ if (strcmp(io->out.blobs.blobs[i].tag, SMB2_CREATE_TAG_QFID) == 0) {
+ if (io->out.blobs.blobs[i].data.length != 32) {
+ smb2_request_destroy(req);
+ return NT_STATUS_INVALID_NETWORK_RESPONSE;
+ }
+ memcpy(io->out.on_disk_id, io->out.blobs.blobs[i].data.data, 32);
+ }
+ }
+
+ data_blob_free(&blob);
+
+ return smb2_request_destroy(req);
+}
+
+/*
+ sync create request
+*/
+NTSTATUS smb2_create(struct smb2_tree *tree, TALLOC_CTX *mem_ctx, struct smb2_create *io)
+{
+ struct smb2_request *req = smb2_create_send(tree, io);
+ return smb2_create_recv(req, mem_ctx, io);
+}
generated by cgit (git 2.34.1) at 2025-04-01 23:14:38 +0000