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Diffstat (limited to '')
| -rw-r--r-- | source3/smbd/smb2_pipes.c | 150 |
1 files changed, 150 insertions, 0 deletions
diff --git a/source3/smbd/smb2_pipes.c b/source3/smbd/smb2_pipes.c new file mode 100644 index 0000000..8f87867 --- /dev/null +++ b/source3/smbd/smb2_pipes.c @@ -0,0 +1,150 @@ +/* + Unix SMB/CIFS implementation. + Pipe SMB reply routines + Copyright (C) Andrew Tridgell 1992-1998 + Copyright (C) Luke Kenneth Casson Leighton 1996-1998 + Copyright (C) Paul Ashton 1997-1998. + Copyright (C) Jeremy Allison 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/>. +*/ +/* + This file handles reply_ calls on named pipes that the server + makes to handle specific protocols +*/ + + +#include "includes.h" +#include "smbd/smbd.h" +#include "smbd/globals.h" +#include "libcli/security/security.h" +#include "rpc_server/srv_pipe_hnd.h" +#include "auth/auth_util.h" +#include "librpc/rpc/dcerpc_helper.h" + +NTSTATUS open_np_file(struct smb_request *smb_req, const char *name, + struct files_struct **pfsp) +{ + struct smbXsrv_connection *xconn = smb_req->xconn; + struct connection_struct *conn = smb_req->conn; + struct files_struct *fsp; + struct smb_filename *smb_fname = NULL; + struct auth_session_info *session_info = conn->session_info; + NTSTATUS status; + + status = file_new(smb_req, conn, &fsp); + if (!NT_STATUS_IS_OK(status)) { + DEBUG(0, ("file_new failed: %s\n", nt_errstr(status))); + return status; + } + + fsp->conn = conn; + fsp_set_fd(fsp, -1); + fsp->vuid = smb_req->vuid; + fsp->fsp_flags.can_lock = false; + fsp->access_mask = FILE_READ_DATA | FILE_WRITE_DATA; + + smb_fname = synthetic_smb_fname(talloc_tos(), + name, + NULL, + NULL, + 0, + 0); + if (smb_fname == NULL) { + file_free(smb_req, fsp); + return NT_STATUS_NO_MEMORY; + } + status = fsp_set_smb_fname(fsp, smb_fname); + TALLOC_FREE(smb_fname); + if (!NT_STATUS_IS_OK(status)) { + file_free(smb_req, fsp); + return status; + } + + if (smb_req->smb2req != NULL && smb_req->smb2req->was_encrypted) { + struct security_token *security_token = NULL; + uint16_t dialect = xconn->smb2.server.dialect; + uint16_t srv_smb_encrypt = DCERPC_SMB_ENCRYPTION_REQUIRED; + uint16_t cipher = xconn->smb2.server.cipher; + struct dom_sid smb3_sid = global_sid_Samba_SMB3; + size_t num_smb3_sids; + bool ok; + + session_info = copy_session_info(fsp, conn->session_info); + if (session_info == NULL) { + DBG_ERR("Failed to copy session info\n"); + file_free(smb_req, fsp); + return NT_STATUS_NO_MEMORY; + } + security_token = session_info->security_token; + + /* + * Security check: + * + * Make sure we don't have a SMB3 SID in the security token! + */ + num_smb3_sids = security_token_count_flag_sids(security_token, + &smb3_sid, + 3, + NULL); + if (num_smb3_sids != 0) { + DBG_ERR("ERROR: %zu SMB3 SIDs have already been " + "detected in the security token!\n", + num_smb3_sids); + file_free(smb_req, fsp); + return NT_STATUS_ACCESS_DENIED; + } + + ok = sid_append_rid(&smb3_sid, dialect); + ok &= sid_append_rid(&smb3_sid, srv_smb_encrypt); + ok &= sid_append_rid(&smb3_sid, cipher); + + if (!ok) { + DBG_ERR("sid too small\n"); + file_free(smb_req, fsp); + return NT_STATUS_BUFFER_TOO_SMALL; + } + + status = add_sid_to_array_unique(security_token, + &smb3_sid, + &security_token->sids, + &security_token->num_sids); + if (!NT_STATUS_IS_OK(status)) { + DBG_ERR("Failed to add SMB3 SID to security token\n"); + file_free(smb_req, fsp); + return status; + } + + fsp->fsp_flags.encryption_required = true; + } + + status = np_open(fsp, name, + conn->sconn->remote_address, + conn->sconn->local_address, + session_info, + conn->sconn->ev_ctx, + conn->sconn->msg_ctx, + conn->sconn->dce_ctx, + &fsp->fake_file_handle); + if (!NT_STATUS_IS_OK(status)) { + DEBUG(10, ("np_open(%s) returned %s\n", name, + nt_errstr(status))); + file_free(smb_req, fsp); + return status; + } + + *pfsp = fsp; + + return NT_STATUS_OK; +} |