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0c419b8a20
Looks larger than it is, this just adds a parameter and while there adapts long lines to README.Coding Signed-off-by: Volker Lendecke <vl@samba.org> Reviewed-by: Jeremy Allison <jra@samba.org>
558 lines
14 KiB
C
558 lines
14 KiB
C
/*
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Unix SMB/CIFS implementation.
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smb2 lib
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Copyright (C) Volker Lendecke 2011
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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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#include "includes.h"
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#include "system/network.h"
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#include "lib/util/tevent_ntstatus.h"
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#include "smb_common.h"
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#include "smbXcli_base.h"
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#include "smb2_create_blob.h"
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#include "reparse_symlink.h"
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struct smb2cli_create_state {
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enum protocol_types protocol; /* for symlink error response parser */
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uint8_t *name_utf16;
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size_t name_utf16_len;
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uint8_t fixed[56];
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uint64_t fid_persistent;
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uint64_t fid_volatile;
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struct smb_create_returns cr;
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struct smb2_create_blobs blobs;
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struct symlink_reparse_struct *symlink;
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struct tevent_req *subreq;
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};
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static void smb2cli_create_done(struct tevent_req *subreq);
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static bool smb2cli_create_cancel(struct tevent_req *req);
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struct tevent_req *smb2cli_create_send(
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TALLOC_CTX *mem_ctx,
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struct tevent_context *ev,
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struct smbXcli_conn *conn,
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uint32_t timeout_msec,
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struct smbXcli_session *session,
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struct smbXcli_tcon *tcon,
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const char *filename,
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uint8_t oplock_level, /* SMB2_OPLOCK_LEVEL_* */
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uint32_t impersonation_level, /* SMB2_IMPERSONATION_* */
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uint32_t desired_access,
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uint32_t file_attributes,
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uint32_t share_access,
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uint32_t create_disposition,
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uint32_t create_options,
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struct smb2_create_blobs *blobs)
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{
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struct tevent_req *req, *subreq;
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struct smb2cli_create_state *state;
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uint8_t *fixed;
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DATA_BLOB blob;
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NTSTATUS status;
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size_t blobs_offset;
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uint8_t *dyn;
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size_t dyn_len;
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size_t max_dyn_len;
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uint32_t additional_flags = 0;
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uint32_t clear_flags = 0;
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bool ok;
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req = tevent_req_create(mem_ctx, &state,
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struct smb2cli_create_state);
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if (req == NULL) {
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return NULL;
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}
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state->protocol = smbXcli_conn_protocol(conn);
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ok = convert_string_talloc(
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state,
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CH_UNIX,
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CH_UTF16,
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filename,
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strlen(filename),
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&state->name_utf16,
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&state->name_utf16_len);
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if (!ok) {
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tevent_req_oom(req);
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return tevent_req_post(req, ev);
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}
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if (strlen(filename) == 0) {
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TALLOC_FREE(state->name_utf16);
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state->name_utf16_len = 0;
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}
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fixed = state->fixed;
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SSVAL(fixed, 0, 57);
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SCVAL(fixed, 3, oplock_level);
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SIVAL(fixed, 4, impersonation_level);
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SIVAL(fixed, 24, desired_access);
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SIVAL(fixed, 28, file_attributes);
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SIVAL(fixed, 32, share_access);
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SIVAL(fixed, 36, create_disposition);
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SIVAL(fixed, 40, create_options);
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SSVAL(fixed, 44, SMB2_HDR_BODY + 56);
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SSVAL(fixed, 46, state->name_utf16_len);
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blob = data_blob_null;
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if (blobs != NULL) {
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status = smb2_create_blob_push(state, &blob, *blobs);
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if (tevent_req_nterror(req, status)) {
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return tevent_req_post(req, ev);
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}
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}
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blobs_offset = state->name_utf16_len;
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blobs_offset = ((blobs_offset + 3) & ~3);
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if (blob.length > 0) {
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blobs_offset = ((blobs_offset + 7) & ~7);
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SIVAL(fixed, 48, blobs_offset + SMB2_HDR_BODY + 56);
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SIVAL(fixed, 52, blob.length);
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}
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dyn_len = MAX(1, blobs_offset + blob.length);
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dyn = talloc_zero_array(state, uint8_t, dyn_len);
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if (tevent_req_nomem(dyn, req)) {
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return tevent_req_post(req, ev);
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}
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if (state->name_utf16 != NULL) {
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memcpy(dyn, state->name_utf16, state->name_utf16_len);
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}
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if (blob.data != NULL) {
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memcpy(dyn + blobs_offset,
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blob.data, blob.length);
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data_blob_free(&blob);
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}
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if (smbXcli_conn_dfs_supported(conn) &&
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smbXcli_tcon_is_dfs_share(tcon))
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{
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additional_flags |= SMB2_HDR_FLAG_DFS;
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}
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/*
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* We use max_dyn_len = 0
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* as we don't explicitly ask for any output length.
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*
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* But it's still possible for the server to return
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* large create blobs.
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*/
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max_dyn_len = 0;
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subreq = smb2cli_req_send(state, ev, conn, SMB2_OP_CREATE,
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additional_flags, clear_flags,
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timeout_msec,
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tcon,
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session,
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state->fixed, sizeof(state->fixed),
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dyn, dyn_len,
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max_dyn_len);
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if (tevent_req_nomem(subreq, req)) {
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return tevent_req_post(req, ev);
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}
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tevent_req_set_callback(subreq, smb2cli_create_done, req);
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state->subreq = subreq;
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tevent_req_set_cancel_fn(req, smb2cli_create_cancel);
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return req;
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}
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static bool smb2cli_create_cancel(struct tevent_req *req)
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{
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struct smb2cli_create_state *state = tevent_req_data(req,
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struct smb2cli_create_state);
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return tevent_req_cancel(state->subreq);
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}
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/*
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* [MS-SMB2] 2.2.2.2.1 Symbolic Link Error Response
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*/
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static NTSTATUS smb2cli_parse_symlink_error_response(
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TALLOC_CTX *mem_ctx,
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const uint8_t *buf,
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size_t buflen,
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struct symlink_reparse_struct **psymlink)
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{
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struct symlink_reparse_struct *symlink = NULL;
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uint32_t symlink_length, error_tag;
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if (buflen < 8) {
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DBG_DEBUG("buffer too short: %zu bytes\n", buflen);
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return NT_STATUS_INVALID_NETWORK_RESPONSE;
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}
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symlink_length = IVAL(buf, 0);
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if (symlink_length != (buflen-4)) {
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DBG_DEBUG("symlink_length=%"PRIu32", (buflen-4)=%zu",
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symlink_length, buflen-4);
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return NT_STATUS_INVALID_NETWORK_RESPONSE;
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}
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error_tag = IVAL(buf, 4);
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if (error_tag != SYMLINK_ERROR_TAG) {
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DBG_DEBUG("error_tag=%"PRIu32", expected 0x%x\n",
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error_tag,
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SYMLINK_ERROR_TAG);
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return NT_STATUS_INVALID_NETWORK_RESPONSE;
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}
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symlink = symlink_reparse_buffer_parse(
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mem_ctx, buf+8, buflen-8);
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if (symlink == NULL) {
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DBG_DEBUG("symlink_reparse_buffer_parse failed\n");
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return NT_STATUS_INVALID_NETWORK_RESPONSE;
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}
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*psymlink = symlink;
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return NT_STATUS_OK;
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}
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/*
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* [MS-SMB2] 2.2.2 ErrorData
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*
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* This is in theory a broad API, but as right now we only have a
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* single [MS-SMB2] 2.2.2.2.1 symlink error response we can return
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* just this.
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*/
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static NTSTATUS smb2cli_create_error_data_parse(
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enum protocol_types protocol,
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uint8_t error_context_count,
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uint32_t byte_count,
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const uint8_t *buf,
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size_t buflen,
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TALLOC_CTX *mem_ctx,
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struct symlink_reparse_struct **_symlink)
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{
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struct symlink_reparse_struct *symlink = NULL;
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uint32_t error_data_length, error_id;
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NTSTATUS status;
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if (protocol != PROTOCOL_SMB3_11) {
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if (error_context_count != 0) {
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DBG_DEBUG("Got error_context_count=%"PRIu8"\n",
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error_context_count);
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return NT_STATUS_INVALID_NETWORK_RESPONSE;
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}
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status = smb2cli_parse_symlink_error_response(
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mem_ctx, buf, buflen, &symlink);
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if (!NT_STATUS_IS_OK(status)) {
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return status;
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}
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*_symlink = symlink;
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return NT_STATUS_OK;
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}
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/*
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* The STOPPED_ON_SYMLINK that I've seen coming from W2k16 has
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* just a single array element in the [MS-SMB2] 2.2.2
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* ErrorData array. We'll need to adapt this if there actually
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* comes an array of multiple ErrorData elements.
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*/
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if (error_context_count != 1) {
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DBG_DEBUG("Got error_context_count=%"PRIu8"\n",
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error_context_count);
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return NT_STATUS_INVALID_NETWORK_RESPONSE;
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}
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if (byte_count != buflen) {
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DBG_DEBUG("bytecount=%"PRIu32", "
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"buflen=%zu\n",
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byte_count,
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buflen);
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return NT_STATUS_INVALID_NETWORK_RESPONSE;
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}
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if (buflen < 8) {
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DBG_DEBUG("buflen=%zu\n", buflen);
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return NT_STATUS_INVALID_NETWORK_RESPONSE;
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}
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error_data_length = IVAL(buf, 0);
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if (error_data_length != (buflen - 8)) {
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DBG_DEBUG("error_data_length=%"PRIu32", expected %zu\n",
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error_data_length,
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buflen - 8);
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return NT_STATUS_INVALID_NETWORK_RESPONSE;
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}
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error_id = IVAL(buf, 4);
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if (error_id != 0) {
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DBG_DEBUG("error_id=%"PRIu32", expected 0\n", error_id);
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return NT_STATUS_INVALID_NETWORK_RESPONSE;
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}
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status = smb2cli_parse_symlink_error_response(
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mem_ctx, buf + 8, buflen - 8, &symlink);
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if (!NT_STATUS_IS_OK(status)) {
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DBG_DEBUG("smb2cli_parse_symlink_error_response failed: %s\n",
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nt_errstr(status));
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return status;
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}
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*_symlink = symlink;
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return NT_STATUS_OK;
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}
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static NTSTATUS smb2cli_create_unparsed_unix_len(
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size_t unparsed_utf16_len,
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uint8_t *name_utf16,
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size_t name_utf16_len,
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size_t *_unparsed_unix_len)
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{
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uint8_t *unparsed_utf16 = NULL;
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uint8_t *unparsed_unix = NULL;
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size_t unparsed_unix_len = 0;
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bool ok;
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if (unparsed_utf16_len > name_utf16_len) {
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DBG_DEBUG("unparsed_utf16_len=%zu, name_utf16_len=%zu\n",
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unparsed_utf16_len,
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name_utf16_len);
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return NT_STATUS_INVALID_NETWORK_RESPONSE;
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}
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if (unparsed_utf16_len == 0) {
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*_unparsed_unix_len = 0;
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return NT_STATUS_OK;
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}
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unparsed_utf16 = name_utf16 + name_utf16_len - unparsed_utf16_len;
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ok = convert_string_talloc(
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talloc_tos(),
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CH_UTF16,
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CH_UNIX,
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unparsed_utf16,
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unparsed_utf16_len,
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&unparsed_unix,
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&unparsed_unix_len);
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if (!ok) {
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NTSTATUS status = map_nt_error_from_unix_common(errno);
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DBG_DEBUG("convert_string_talloc failed: %s\n",
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strerror(errno));
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return status;
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}
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*_unparsed_unix_len = unparsed_unix_len;
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return NT_STATUS_OK;
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}
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static void smb2cli_create_done(struct tevent_req *subreq)
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{
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struct tevent_req *req =
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tevent_req_callback_data(subreq,
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struct tevent_req);
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struct smb2cli_create_state *state =
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tevent_req_data(req,
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struct smb2cli_create_state);
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NTSTATUS status;
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struct iovec *iov;
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uint8_t *body;
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uint32_t offset, length;
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static const struct smb2cli_req_expected_response expected[] = {
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{
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.status = NT_STATUS_OK,
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.body_size = 0x59
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},
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{
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.status = NT_STATUS_STOPPED_ON_SYMLINK,
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.body_size = 0x9,
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}
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};
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status = smb2cli_req_recv(subreq, state, &iov,
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expected, ARRAY_SIZE(expected));
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TALLOC_FREE(subreq);
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if (NT_STATUS_EQUAL(status, NT_STATUS_STOPPED_ON_SYMLINK)) {
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uint16_t error_context_count = CVAL(iov[1].iov_base, 2);
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uint32_t byte_count = IVAL(iov[1].iov_base, 4);
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size_t unparsed_unix_len = 0;
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NTSTATUS symlink_status;
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symlink_status = smb2cli_create_error_data_parse(
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state->protocol,
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error_context_count,
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byte_count,
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iov[2].iov_base,
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iov[2].iov_len,
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state,
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&state->symlink);
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if (tevent_req_nterror(req, symlink_status)) {
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return;
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}
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/*
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* Our callers want to know the unparsed length in
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* unix encoding.
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*/
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symlink_status = smb2cli_create_unparsed_unix_len(
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state->symlink->unparsed_path_length,
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state->name_utf16,
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state->name_utf16_len,
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&unparsed_unix_len);
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if (tevent_req_nterror(req, symlink_status)) {
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return;
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}
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state->symlink->unparsed_path_length = unparsed_unix_len;
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}
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if (tevent_req_nterror(req, status)) {
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return;
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}
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body = (uint8_t *)iov[1].iov_base;
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state->cr.oplock_level = CVAL(body, 2);
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state->cr.create_action = IVAL(body, 4);
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state->cr.creation_time = BVAL(body, 8);
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state->cr.last_access_time = BVAL(body, 16);
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state->cr.last_write_time = BVAL(body, 24);
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state->cr.change_time = BVAL(body, 32);
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state->cr.allocation_size = BVAL(body, 40);
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state->cr.end_of_file = BVAL(body, 48);
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state->cr.file_attributes = IVAL(body, 56);
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state->fid_persistent = BVAL(body, 64);
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state->fid_volatile = BVAL(body, 72);
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offset = IVAL(body, 80);
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length = IVAL(body, 84);
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if ((offset != 0) && (length != 0)) {
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if ((offset != SMB2_HDR_BODY + 88) ||
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(length > iov[2].iov_len)) {
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tevent_req_nterror(
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req, NT_STATUS_INVALID_NETWORK_RESPONSE);
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return;
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}
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status = smb2_create_blob_parse(
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state, data_blob_const(iov[2].iov_base, length),
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&state->blobs);
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if (tevent_req_nterror(req, status)) {
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return;
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}
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}
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tevent_req_done(req);
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}
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NTSTATUS smb2cli_create_recv(struct tevent_req *req,
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uint64_t *fid_persistent,
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uint64_t *fid_volatile,
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struct smb_create_returns *cr,
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TALLOC_CTX *mem_ctx,
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struct smb2_create_blobs *blobs,
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struct symlink_reparse_struct **psymlink)
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{
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struct smb2cli_create_state *state =
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tevent_req_data(req,
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struct smb2cli_create_state);
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NTSTATUS status;
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if (tevent_req_is_nterror(req, &status)) {
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if (NT_STATUS_EQUAL(status, NT_STATUS_STOPPED_ON_SYMLINK) &&
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(psymlink != NULL)) {
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*psymlink = talloc_move(mem_ctx, &state->symlink);
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}
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tevent_req_received(req);
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return status;
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}
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*fid_persistent = state->fid_persistent;
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*fid_volatile = state->fid_volatile;
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if (cr) {
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*cr = state->cr;
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}
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if (blobs) {
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blobs->num_blobs = state->blobs.num_blobs;
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blobs->blobs = talloc_move(mem_ctx, &state->blobs.blobs);
|
|
}
|
|
tevent_req_received(req);
|
|
return NT_STATUS_OK;
|
|
}
|
|
|
|
NTSTATUS smb2cli_create(struct smbXcli_conn *conn,
|
|
uint32_t timeout_msec,
|
|
struct smbXcli_session *session,
|
|
struct smbXcli_tcon *tcon,
|
|
const char *filename,
|
|
uint8_t oplock_level, /* SMB2_OPLOCK_LEVEL_* */
|
|
uint32_t impersonation_level, /* SMB2_IMPERSONATION_* */
|
|
uint32_t desired_access,
|
|
uint32_t file_attributes,
|
|
uint32_t share_access,
|
|
uint32_t create_disposition,
|
|
uint32_t create_options,
|
|
struct smb2_create_blobs *blobs,
|
|
uint64_t *fid_persistent,
|
|
uint64_t *fid_volatile,
|
|
struct smb_create_returns *cr,
|
|
TALLOC_CTX *mem_ctx,
|
|
struct smb2_create_blobs *ret_blobs,
|
|
struct symlink_reparse_struct **psymlink)
|
|
{
|
|
TALLOC_CTX *frame = talloc_stackframe();
|
|
struct tevent_context *ev;
|
|
struct tevent_req *req;
|
|
NTSTATUS status = NT_STATUS_NO_MEMORY;
|
|
|
|
if (smbXcli_conn_has_async_calls(conn)) {
|
|
/*
|
|
* Can't use sync call while an async call is in flight
|
|
*/
|
|
status = NT_STATUS_INVALID_PARAMETER;
|
|
goto fail;
|
|
}
|
|
ev = samba_tevent_context_init(frame);
|
|
if (ev == NULL) {
|
|
goto fail;
|
|
}
|
|
req = smb2cli_create_send(frame, ev, conn, timeout_msec,
|
|
session, tcon,
|
|
filename, oplock_level,
|
|
impersonation_level, desired_access,
|
|
file_attributes, share_access,
|
|
create_disposition, create_options,
|
|
blobs);
|
|
if (req == NULL) {
|
|
goto fail;
|
|
}
|
|
if (!tevent_req_poll_ntstatus(req, ev, &status)) {
|
|
goto fail;
|
|
}
|
|
status = smb2cli_create_recv(
|
|
req,
|
|
fid_persistent,
|
|
fid_volatile,
|
|
cr,
|
|
mem_ctx,
|
|
ret_blobs,
|
|
psymlink);
|
|
fail:
|
|
TALLOC_FREE(frame);
|
|
return status;
|
|
}
|