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Diffstat (limited to 'source3/smbd/fake_file.c')
| -rw-r--r-- | source3/smbd/fake_file.c | 213 |
1 files changed, 213 insertions, 0 deletions
diff --git a/source3/smbd/fake_file.c b/source3/smbd/fake_file.c new file mode 100644 index 0000000..32f2595 --- /dev/null +++ b/source3/smbd/fake_file.c @@ -0,0 +1,213 @@ +/* + Unix SMB/CIFS implementation. + FAKE FILE support, for faking up special files windows want access to + Copyright (C) Stefan (metze) Metzmacher 2003 + + 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 "smbd/smbd.h" +#include "smbd/globals.h" +#include "fake_file.h" +#include "auth.h" + +struct fake_file_type { + const char *name; + enum FAKE_FILE_TYPE type; + void *(*init_pd)(TALLOC_CTX *mem_ctx); +}; + +static const struct fake_file_type fake_files[] = { +#ifdef WITH_QUOTAS + {FAKE_FILE_NAME_QUOTA_UNIX, FAKE_FILE_TYPE_QUOTA, init_quota_handle}, +#endif /* WITH_QUOTAS */ + {NULL, FAKE_FILE_TYPE_NONE, NULL} +}; + +/**************************************************************************** + Create a fake file handle +****************************************************************************/ + +static struct fake_file_handle *init_fake_file_handle(enum FAKE_FILE_TYPE type) +{ + struct fake_file_handle *fh = NULL; + int i; + + for (i=0; fake_files[i].name!=NULL; i++) { + if (fake_files[i].type==type) { + break; + } + } + + if (fake_files[i].name == NULL) { + return NULL; + } + + DEBUG(5,("init_fake_file_handle: for [%s]\n",fake_files[i].name)); + + fh = talloc(NULL, struct fake_file_handle); + if (fh == NULL) { + DEBUG(0,("TALLOC_ZERO() failed.\n")); + return NULL; + } + + fh->type = type; + + if (fake_files[i].init_pd) { + fh->private_data = fake_files[i].init_pd(fh); + } + return fh; +} + +/**************************************************************************** + Does this name match a fake filename ? +****************************************************************************/ + +enum FAKE_FILE_TYPE is_fake_file_path(const char *path) +{ + int i; + + if (!path) { + return FAKE_FILE_TYPE_NONE; + } + + for (i=0;fake_files[i].name!=NULL;i++) { + if (strncmp(path,fake_files[i].name,strlen(fake_files[i].name))==0) { + DEBUG(5,("is_fake_file: [%s] is a fake file\n",path)); + return fake_files[i].type; + } + } + + return FAKE_FILE_TYPE_NONE; +} + +enum FAKE_FILE_TYPE is_fake_file(const struct smb_filename *smb_fname) +{ + char *fname = NULL; + NTSTATUS status; + enum FAKE_FILE_TYPE ret; + + if (!smb_fname) { + return FAKE_FILE_TYPE_NONE; + } + + status = get_full_smb_filename(talloc_tos(), smb_fname, &fname); + if (!NT_STATUS_IS_OK(status)) { + return FAKE_FILE_TYPE_NONE; + } + + ret = is_fake_file_path(fname); + + TALLOC_FREE(fname); + + return ret; +} + +uint32_t dosmode_from_fake_filehandle(const struct fake_file_handle *ffh) +{ + if (ffh->type != FAKE_FILE_TYPE_QUOTA) { + DBG_ERR("Unexpected fake_file_handle: %d\n", ffh->type); + log_stack_trace(); + return FILE_ATTRIBUTE_NORMAL; + } + + /* This is what Windows 2016 returns */ + return FILE_ATTRIBUTE_HIDDEN + | FILE_ATTRIBUTE_SYSTEM + | FILE_ATTRIBUTE_DIRECTORY + | FILE_ATTRIBUTE_ARCHIVE; +} + +/**************************************************************************** + Open a fake quota file with a share mode. +****************************************************************************/ + +NTSTATUS open_fake_file(struct smb_request *req, connection_struct *conn, + uint64_t current_vuid, + enum FAKE_FILE_TYPE fake_file_type, + const struct smb_filename *smb_fname, + uint32_t access_mask, + files_struct **result) +{ + const struct loadparm_substitution *lp_sub = + loadparm_s3_global_substitution(); + files_struct *fsp = NULL; + NTSTATUS status; + + /* access check */ + if (geteuid() != sec_initial_uid()) { + DBG_NOTICE("access_denied to service[%s] file[%s] user[%s]\n", + lp_servicename(talloc_tos(), lp_sub, SNUM(conn)), + smb_fname_str_dbg(smb_fname), + conn->session_info->unix_info->unix_name); + return NT_STATUS_ACCESS_DENIED; + + } + + status = file_new(req, conn, &fsp); + if(!NT_STATUS_IS_OK(status)) { + return status; + } + + DBG_INFO("fname = %s, %s, access_mask = 0x%"PRIx32"\n", + smb_fname_str_dbg(smb_fname), + fsp_fnum_dbg(fsp), + access_mask); + + fsp->conn = conn; + fsp_set_fd(fsp, -1); + fsp->vuid = current_vuid; + fh_set_pos(fsp->fh, -1); + fsp->fsp_flags.can_lock = false; /* Should this be true ? - No, JRA */ + fsp->access_mask = access_mask; + status = fsp_set_smb_fname(fsp, smb_fname); + if (!NT_STATUS_IS_OK(status)) { + file_free(req, fsp); + return NT_STATUS_NO_MEMORY; + } + + fsp->fake_file_handle = init_fake_file_handle(fake_file_type); + + if (fsp->fake_file_handle==NULL) { + file_free(req, fsp); + return NT_STATUS_NO_MEMORY; + } + + status = smbd_calculate_access_mask_fsp(conn->cwd_fsp, + fsp, + false, + access_mask, + &access_mask); + if (!NT_STATUS_IS_OK(status)) { + DBG_DEBUG("smbd_calculate_access_mask_fsp " + "on service[%s] file[%s] returned %s\n", + lp_servicename(talloc_tos(), lp_sub, SNUM(conn)), + smb_fname_str_dbg(smb_fname), + nt_errstr(status)); + file_free(req, fsp); + return status; + } + + *result = fsp; + return NT_STATUS_OK; +} + +NTSTATUS close_fake_file(struct smb_request *req, files_struct *fsp) +{ + /* + * Nothing to do, fake files don't hold any resources + */ + return NT_STATUS_OK; +} |