diff options
author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-19 17:20:00 +0000 |
---|---|---|
committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-19 17:20:00 +0000 |
commit | 8daa83a594a2e98f39d764422bfbdbc62c9efd44 (patch) | |
tree | 4099e8021376c7d8c05bdf8503093d80e9c7bad0 /libcli/smb/smb2cli_create.c | |
parent | Initial commit. (diff) | |
download | samba-8daa83a594a2e98f39d764422bfbdbc62c9efd44.tar.xz samba-8daa83a594a2e98f39d764422bfbdbc62c9efd44.zip |
Adding upstream version 2:4.20.0+dfsg.upstream/2%4.20.0+dfsg
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | libcli/smb/smb2cli_create.c | 580 |
1 files changed, 580 insertions, 0 deletions
diff --git a/libcli/smb/smb2cli_create.c b/libcli/smb/smb2cli_create.c new file mode 100644 index 0000000..e740365 --- /dev/null +++ b/libcli/smb/smb2cli_create.c @@ -0,0 +1,580 @@ +/* + Unix SMB/CIFS implementation. + smb2 lib + Copyright (C) Volker Lendecke 2011 + + 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 "system/network.h" +#include "lib/util/tevent_ntstatus.h" +#include "smb_common.h" +#include "smbXcli_base.h" +#include "smb2_create_blob.h" +#include "reparse.h" + +struct smb2cli_create_state { + enum protocol_types protocol; /* for symlink error response parser */ + uint8_t *name_utf16; + size_t name_utf16_len; + uint8_t fixed[56]; + + uint64_t fid_persistent; + uint64_t fid_volatile; + struct smb_create_returns cr; + struct smb2_create_blobs blobs; + struct symlink_reparse_struct *symlink; + struct tevent_req *subreq; +}; + +static void smb2cli_create_done(struct tevent_req *subreq); +static bool smb2cli_create_cancel(struct tevent_req *req); + +struct tevent_req *smb2cli_create_send( + TALLOC_CTX *mem_ctx, + struct tevent_context *ev, + 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) +{ + struct tevent_req *req, *subreq; + struct smb2cli_create_state *state; + uint8_t *fixed; + DATA_BLOB blob; + NTSTATUS status; + size_t blobs_offset; + uint8_t *dyn; + size_t dyn_len; + size_t max_dyn_len; + uint32_t additional_flags = 0; + uint32_t clear_flags = 0; + bool ok; + + req = tevent_req_create(mem_ctx, &state, + struct smb2cli_create_state); + if (req == NULL) { + return NULL; + } + state->protocol = smbXcli_conn_protocol(conn); + + ok = convert_string_talloc( + state, + CH_UNIX, + CH_UTF16, + filename, + strlen(filename), + &state->name_utf16, + &state->name_utf16_len); + if (!ok) { + tevent_req_oom(req); + return tevent_req_post(req, ev); + } + + if (strlen(filename) == 0) { + TALLOC_FREE(state->name_utf16); + state->name_utf16_len = 0; + } + + fixed = state->fixed; + + SSVAL(fixed, 0, 57); + SCVAL(fixed, 3, oplock_level); + SIVAL(fixed, 4, impersonation_level); + SIVAL(fixed, 24, desired_access); + SIVAL(fixed, 28, file_attributes); + SIVAL(fixed, 32, share_access); + SIVAL(fixed, 36, create_disposition); + SIVAL(fixed, 40, create_options); + + SSVAL(fixed, 44, SMB2_HDR_BODY + 56); + SSVAL(fixed, 46, state->name_utf16_len); + + blob = data_blob_null; + + if (blobs != NULL) { + status = smb2_create_blob_push(state, &blob, *blobs); + if (tevent_req_nterror(req, status)) { + return tevent_req_post(req, ev); + } + } + + blobs_offset = state->name_utf16_len; + blobs_offset = ((blobs_offset + 3) & ~3); + + if (blob.length > 0) { + blobs_offset = ((blobs_offset + 7) & ~7); + SIVAL(fixed, 48, blobs_offset + SMB2_HDR_BODY + 56); + SIVAL(fixed, 52, blob.length); + } + + dyn_len = MAX(1, blobs_offset + blob.length); + dyn = talloc_zero_array(state, uint8_t, dyn_len); + if (tevent_req_nomem(dyn, req)) { + return tevent_req_post(req, ev); + } + + if (state->name_utf16 != NULL) { + memcpy(dyn, state->name_utf16, state->name_utf16_len); + } + + if (blob.data != NULL) { + memcpy(dyn + blobs_offset, + blob.data, blob.length); + data_blob_free(&blob); + } + + if (smbXcli_conn_dfs_supported(conn) && + smbXcli_tcon_is_dfs_share(tcon)) + { + additional_flags |= SMB2_HDR_FLAG_DFS; + } + + /* + * We use max_dyn_len = 0 + * as we don't explicitly ask for any output length. + * + * But it's still possible for the server to return + * large create blobs. + */ + max_dyn_len = 0; + + subreq = smb2cli_req_send(state, ev, conn, SMB2_OP_CREATE, + additional_flags, clear_flags, + timeout_msec, + tcon, + session, + state->fixed, sizeof(state->fixed), + dyn, dyn_len, + max_dyn_len); + if (tevent_req_nomem(subreq, req)) { + return tevent_req_post(req, ev); + } + tevent_req_set_callback(subreq, smb2cli_create_done, req); + + state->subreq = subreq; + tevent_req_set_cancel_fn(req, smb2cli_create_cancel); + + return req; +} + +static bool smb2cli_create_cancel(struct tevent_req *req) +{ + struct smb2cli_create_state *state = tevent_req_data(req, + struct smb2cli_create_state); + return tevent_req_cancel(state->subreq); +} + +/* + * [MS-SMB2] 2.2.2.2.1 Symbolic Link Error Response + */ + +static NTSTATUS smb2cli_parse_symlink_error_response( + TALLOC_CTX *mem_ctx, + const uint8_t *buf, + size_t buflen, + struct symlink_reparse_struct **psymlink) +{ + struct symlink_reparse_struct *symlink = NULL; + struct reparse_data_buffer reparse_buf = { + .tag = 0, + }; + uint32_t symlink_length, error_tag; + NTSTATUS status; + + if (buflen < 8) { + DBG_DEBUG("buffer too short: %zu bytes\n", buflen); + return NT_STATUS_INVALID_NETWORK_RESPONSE; + } + + symlink_length = IVAL(buf, 0); + if (symlink_length != (buflen-4)) { + DBG_DEBUG("symlink_length=%"PRIu32", (buflen-4)=%zu\n", + symlink_length, buflen-4); + return NT_STATUS_INVALID_NETWORK_RESPONSE; + } + + error_tag = IVAL(buf, 4); + if (error_tag != SYMLINK_ERROR_TAG) { + DBG_DEBUG("error_tag=%"PRIu32", expected 0x%x\n", + error_tag, + SYMLINK_ERROR_TAG); + return NT_STATUS_INVALID_NETWORK_RESPONSE; + } + + symlink = talloc(mem_ctx, struct symlink_reparse_struct); + if (symlink == NULL) { + return NT_STATUS_NO_MEMORY; + } + + status = reparse_data_buffer_parse(symlink, + &reparse_buf, + buf + 8, + buflen - 8); + if (!NT_STATUS_IS_OK(status)) { + DBG_DEBUG("reparse_data_buffer_parse() failed: %s\n", + nt_errstr(status)); + TALLOC_FREE(symlink); + return status; + } + + if (reparse_buf.tag != IO_REPARSE_TAG_SYMLINK) { + DBG_DEBUG("Got tag 0x%" PRIx32 ", " + "expected IO_REPARSE_TAG_SYMLINK\n", + reparse_buf.tag); + TALLOC_FREE(symlink); + return NT_STATUS_INVALID_NETWORK_RESPONSE; + } + + *symlink = reparse_buf.parsed.lnk; + *psymlink = symlink; + return NT_STATUS_OK; +} + +/* + * [MS-SMB2] 2.2.2 ErrorData + * + * This is in theory a broad API, but as right now we only have a + * single [MS-SMB2] 2.2.2.2.1 symlink error response we can return + * just this. + */ +static NTSTATUS smb2cli_create_error_data_parse( + enum protocol_types protocol, + uint8_t error_context_count, + uint32_t byte_count, + const uint8_t *buf, + size_t buflen, + TALLOC_CTX *mem_ctx, + struct symlink_reparse_struct **_symlink) +{ + struct symlink_reparse_struct *symlink = NULL; + uint32_t error_data_length, error_id; + NTSTATUS status; + + if (protocol != PROTOCOL_SMB3_11) { + if (error_context_count != 0) { + DBG_DEBUG("Got error_context_count=%"PRIu8"\n", + error_context_count); + return NT_STATUS_INVALID_NETWORK_RESPONSE; + } + + status = smb2cli_parse_symlink_error_response( + mem_ctx, buf, buflen, &symlink); + if (!NT_STATUS_IS_OK(status)) { + return status; + } + *_symlink = symlink; + return NT_STATUS_OK; + } + + /* + * The STOPPED_ON_SYMLINK that I've seen coming from W2k16 has + * just a single array element in the [MS-SMB2] 2.2.2 + * ErrorData array. We'll need to adapt this if there actually + * comes an array of multiple ErrorData elements. + */ + + if (error_context_count != 1) { + DBG_DEBUG("Got error_context_count=%"PRIu8"\n", + error_context_count); + return NT_STATUS_INVALID_NETWORK_RESPONSE; + } + + if (byte_count != buflen) { + DBG_DEBUG("bytecount=%"PRIu32", " + "buflen=%zu\n", + byte_count, + buflen); + return NT_STATUS_INVALID_NETWORK_RESPONSE; + } + + if (buflen < 8) { + DBG_DEBUG("buflen=%zu\n", buflen); + return NT_STATUS_INVALID_NETWORK_RESPONSE; + } + + error_data_length = IVAL(buf, 0); + if (error_data_length != (buflen - 8)) { + DBG_DEBUG("error_data_length=%"PRIu32", expected %zu\n", + error_data_length, + buflen - 8); + return NT_STATUS_INVALID_NETWORK_RESPONSE; + } + + error_id = IVAL(buf, 4); + if (error_id != 0) { + DBG_DEBUG("error_id=%"PRIu32", expected 0\n", error_id); + return NT_STATUS_INVALID_NETWORK_RESPONSE; + } + + status = smb2cli_parse_symlink_error_response( + mem_ctx, buf + 8, buflen - 8, &symlink); + if (!NT_STATUS_IS_OK(status)) { + DBG_DEBUG("smb2cli_parse_symlink_error_response failed: %s\n", + nt_errstr(status)); + return status; + } + + *_symlink = symlink; + return NT_STATUS_OK; +} + +static NTSTATUS smb2cli_create_unparsed_unix_len( + size_t unparsed_utf16_len, + uint8_t *name_utf16, + size_t name_utf16_len, + size_t *_unparsed_unix_len) +{ + uint8_t *unparsed_utf16 = NULL; + uint8_t *unparsed_unix = NULL; + size_t unparsed_unix_len = 0; + bool ok; + + if (unparsed_utf16_len > name_utf16_len) { + DBG_DEBUG("unparsed_utf16_len=%zu, name_utf16_len=%zu\n", + unparsed_utf16_len, + name_utf16_len); + return NT_STATUS_INVALID_NETWORK_RESPONSE; + } + + if (unparsed_utf16_len == 0) { + *_unparsed_unix_len = 0; + return NT_STATUS_OK; + } + + unparsed_utf16 = name_utf16 + name_utf16_len - unparsed_utf16_len; + + ok = convert_string_talloc( + talloc_tos(), + CH_UTF16, + CH_UNIX, + unparsed_utf16, + unparsed_utf16_len, + &unparsed_unix, + &unparsed_unix_len); + if (!ok) { + NTSTATUS status = map_nt_error_from_unix_common(errno); + DBG_DEBUG("convert_string_talloc failed: %s\n", + strerror(errno)); + return status; + } + *_unparsed_unix_len = unparsed_unix_len; + return NT_STATUS_OK; +} + +static void smb2cli_create_done(struct tevent_req *subreq) +{ + struct tevent_req *req = + tevent_req_callback_data(subreq, + struct tevent_req); + struct smb2cli_create_state *state = + tevent_req_data(req, + struct smb2cli_create_state); + NTSTATUS status; + struct iovec *iov; + uint8_t *body; + uint32_t offset, length; + static const struct smb2cli_req_expected_response expected[] = { + { + .status = NT_STATUS_OK, + .body_size = 0x59 + }, + { + .status = NT_STATUS_STOPPED_ON_SYMLINK, + .body_size = 0x9, + } + }; + + status = smb2cli_req_recv(subreq, state, &iov, + expected, ARRAY_SIZE(expected)); + TALLOC_FREE(subreq); + + if (NT_STATUS_EQUAL(status, NT_STATUS_STOPPED_ON_SYMLINK)) { + uint16_t error_context_count = CVAL(iov[1].iov_base, 2); + uint32_t byte_count = IVAL(iov[1].iov_base, 4); + size_t unparsed_unix_len = 0; + + NTSTATUS symlink_status; + + symlink_status = smb2cli_create_error_data_parse( + state->protocol, + error_context_count, + byte_count, + iov[2].iov_base, + iov[2].iov_len, + state, + &state->symlink); + if (tevent_req_nterror(req, symlink_status)) { + return; + } + + /* + * Our callers want to know the unparsed length in + * unix encoding. + */ + symlink_status = smb2cli_create_unparsed_unix_len( + state->symlink->unparsed_path_length, + state->name_utf16, + state->name_utf16_len, + &unparsed_unix_len); + if (tevent_req_nterror(req, symlink_status)) { + return; + } + state->symlink->unparsed_path_length = unparsed_unix_len; + } + + if (tevent_req_nterror(req, status)) { + return; + } + + body = (uint8_t *)iov[1].iov_base; + + state->cr.oplock_level = CVAL(body, 2); + state->cr.flags = CVAL(body, 3); + state->cr.create_action = IVAL(body, 4); + state->cr.creation_time = BVAL(body, 8); + state->cr.last_access_time = BVAL(body, 16); + state->cr.last_write_time = BVAL(body, 24); + state->cr.change_time = BVAL(body, 32); + state->cr.allocation_size = BVAL(body, 40); + state->cr.end_of_file = BVAL(body, 48); + state->cr.file_attributes = IVAL(body, 56); + state->fid_persistent = BVAL(body, 64); + state->fid_volatile = BVAL(body, 72); + + offset = IVAL(body, 80); + length = IVAL(body, 84); + + if ((offset != 0) && (length != 0)) { + if ((offset != SMB2_HDR_BODY + 88) || + (length > iov[2].iov_len)) { + tevent_req_nterror( + req, NT_STATUS_INVALID_NETWORK_RESPONSE); + return; + } + status = smb2_create_blob_parse( + state, data_blob_const(iov[2].iov_base, length), + &state->blobs); + if (tevent_req_nterror(req, status)) { + return; + } + } + tevent_req_done(req); +} + +NTSTATUS smb2cli_create_recv(struct tevent_req *req, + uint64_t *fid_persistent, + uint64_t *fid_volatile, + struct smb_create_returns *cr, + TALLOC_CTX *mem_ctx, + struct smb2_create_blobs *blobs, + struct symlink_reparse_struct **psymlink) +{ + struct smb2cli_create_state *state = + tevent_req_data(req, + struct smb2cli_create_state); + NTSTATUS status; + + if (tevent_req_is_nterror(req, &status)) { + if (NT_STATUS_EQUAL(status, NT_STATUS_STOPPED_ON_SYMLINK) && + (psymlink != NULL)) { + *psymlink = talloc_move(mem_ctx, &state->symlink); + } + tevent_req_received(req); + return status; + } + *fid_persistent = state->fid_persistent; + *fid_volatile = state->fid_volatile; + if (cr) { + *cr = state->cr; + } + if (blobs) { + blobs->num_blobs = state->blobs.num_blobs; + 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; +} |