#include "includes.h"
#include "librpc/gen_ndr/xattr.h"
#include "librpc/gen_ndr/ndr_xattr.h"
+#include "../lib/crypto/crypto.h"
#undef DBGC_CLASS
#define DBGC_CLASS DBGC_VFS
-/*******************************************************************
- Parse out a struct security_descriptor from a DATA_BLOB.
-*******************************************************************/
-
-static NTSTATUS parse_acl_blob(const DATA_BLOB *pblob,
- uint32 security_info,
- struct security_descriptor **ppdesc)
-{
- TALLOC_CTX *ctx = talloc_tos();
- struct xattr_NTACL xacl;
- enum ndr_err_code ndr_err;
- size_t sd_size;
-
- ndr_err = ndr_pull_struct_blob(pblob, ctx, NULL, &xacl,
- (ndr_pull_flags_fn_t)ndr_pull_xattr_NTACL);
-
- if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
- DEBUG(5, ("parse_acl_blob: ndr_pull_xattr_NTACL failed: %s\n",
- ndr_errstr(ndr_err)));
- return ndr_map_error2ntstatus(ndr_err);;
- }
-
- if (xacl.version != 2) {
- return NT_STATUS_REVISION_MISMATCH;
- }
-
- *ppdesc = make_sec_desc(ctx, SEC_DESC_REVISION, xacl.info.sd_hs->sd->type | SEC_DESC_SELF_RELATIVE,
- (security_info & OWNER_SECURITY_INFORMATION)
- ? xacl.info.sd_hs->sd->owner_sid : NULL,
- (security_info & GROUP_SECURITY_INFORMATION)
- ? xacl.info.sd_hs->sd->group_sid : NULL,
- (security_info & SACL_SECURITY_INFORMATION)
- ? xacl.info.sd_hs->sd->sacl : NULL,
- (security_info & DACL_SECURITY_INFORMATION)
- ? xacl.info.sd_hs->sd->dacl : NULL,
- &sd_size);
-
- TALLOC_FREE(xacl.info.sd);
-
- return (*ppdesc != NULL) ? NT_STATUS_OK : NT_STATUS_NO_MEMORY;
-}
+/* Pull in the common functions. */
+#include "modules/vfs_acl_common.c"
/*******************************************************************
Pull a security descriptor into a DATA_BLOB from a xattr.
return NT_STATUS_OK;
}
-/*******************************************************************
- Create a DATA_BLOB from a security descriptor.
-*******************************************************************/
-
-static NTSTATUS create_acl_blob(const struct security_descriptor *psd, DATA_BLOB *pblob)
-{
- struct xattr_NTACL xacl;
- struct security_descriptor_hash sd_hs;
- enum ndr_err_code ndr_err;
- TALLOC_CTX *ctx = talloc_tos();
-
- ZERO_STRUCT(xacl);
- ZERO_STRUCT(sd_hs);
-
- xacl.version = 2;
- xacl.info.sd_hs = &sd_hs;
- xacl.info.sd_hs->sd = CONST_DISCARD(struct security_descriptor *, psd);
- memset(&xacl.info.sd_hs->hash[0], '\0', 16);
-
- ndr_err = ndr_push_struct_blob(
- pblob, ctx, NULL, &xacl,
- (ndr_push_flags_fn_t)ndr_push_xattr_NTACL);
-
- if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
- DEBUG(5, ("create_acl_blob: ndr_push_xattr_NTACL failed: %s\n",
- ndr_errstr(ndr_err)));
- return ndr_map_error2ntstatus(ndr_err);;
- }
-
- return NT_STATUS_OK;
-}
-
/*******************************************************************
Store a DATA_BLOB into an xattr given an fsp pointer.
*******************************************************************/
int saved_errno = 0;
DEBUG(10,("store_acl_blob_fsp: storing blob length %u on file %s\n",
- (unsigned int)pblob->length, fsp->fsp_name));
+ (unsigned int)pblob->length, fsp_str_dbg(fsp)));
become_root();
if (fsp->fh->fd != -1) {
ret = SMB_VFS_FSETXATTR(fsp, XATTR_NTACL_NAME,
pblob->data, pblob->length, 0);
} else {
- ret = SMB_VFS_SETXATTR(fsp->conn, fsp->fsp_name,
+ ret = SMB_VFS_SETXATTR(fsp->conn, fsp->fsp_name->base_name,
XATTR_NTACL_NAME,
pblob->data, pblob->length, 0);
}
errno = saved_errno;
DEBUG(5, ("store_acl_blob_fsp: setting attr failed for file %s"
"with error %s\n",
- fsp->fsp_name,
+ fsp_str_dbg(fsp),
strerror(errno) ));
return map_nt_error_from_unix(errno);
}
return NT_STATUS_OK;
}
-/*******************************************************************
- Store a DATA_BLOB into an xattr given a pathname.
-*******************************************************************/
-
-static NTSTATUS get_nt_acl_xattr_internal(vfs_handle_struct *handle,
- files_struct *fsp,
- const char *name,
- uint32 security_info,
- struct security_descriptor **ppdesc)
-{
- TALLOC_CTX *ctx = talloc_tos();
- DATA_BLOB blob;
- NTSTATUS status;
-
- if (fsp && name == NULL) {
- name = fsp->fsp_name;
- }
-
- DEBUG(10, ("get_nt_acl_xattr_internal: name=%s\n", name));
-
- status = get_acl_blob(ctx, handle, fsp, name, &blob);
- if (!NT_STATUS_IS_OK(status)) {
- DEBUG(10, ("get_acl_blob returned %s\n", nt_errstr(status)));
- return status;
- }
-
- status = parse_acl_blob(&blob, security_info, ppdesc);
- if (!NT_STATUS_IS_OK(status)) {
- DEBUG(10, ("parse_acl_blob returned %s\n",
- nt_errstr(status)));
- return status;
- }
-
- TALLOC_FREE(blob.data);
- return status;
-}
-
-/*********************************************************************
- Create a default security descriptor for a file in case no inheritance
- exists. All permissions to the owner and SYSTEM.
-*********************************************************************/
-
-static struct security_descriptor *default_file_sd(TALLOC_CTX *mem_ctx,
- SMB_STRUCT_STAT *psbuf)
-{
- struct dom_sid owner_sid, group_sid;
- size_t sd_size;
- struct security_ace *pace = NULL;
- struct security_acl *pacl = NULL;
-
- uid_to_sid(&owner_sid, psbuf->st_ex_uid);
- gid_to_sid(&group_sid, psbuf->st_ex_gid);
-
- pace = TALLOC_ARRAY(mem_ctx, struct security_ace, 2);
- if (!pace) {
- return NULL;
- }
-
- init_sec_ace(&pace[0], &owner_sid, SEC_ACE_TYPE_ACCESS_ALLOWED,
- SEC_RIGHTS_FILE_ALL, 0);
- init_sec_ace(&pace[1], &global_sid_System, SEC_ACE_TYPE_ACCESS_ALLOWED,
- SEC_RIGHTS_FILE_ALL, 0);
-
- pacl = make_sec_acl(mem_ctx,
- NT4_ACL_REVISION,
- 2,
- pace);
- if (!pacl) {
- return NULL;
- }
- return make_sec_desc(mem_ctx,
- SECURITY_DESCRIPTOR_REVISION_1,
- SEC_DESC_SELF_RELATIVE|SEC_DESC_DACL_PRESENT,
- &owner_sid,
- &group_sid,
- NULL,
- pacl,
- &sd_size);
-}
-
-/*********************************************************************
-*********************************************************************/
-
-static NTSTATUS inherit_new_acl(vfs_handle_struct *handle,
- const char *fname,
- files_struct *fsp,
- bool container)
-{
- TALLOC_CTX *ctx = talloc_tos();
- NTSTATUS status;
- struct security_descriptor *parent_desc = NULL;
- struct security_descriptor *psd = NULL;
- DATA_BLOB blob;
- size_t size;
- char *parent_name;
-
- if (!parent_dirname(ctx, fname, &parent_name, NULL)) {
- return NT_STATUS_NO_MEMORY;
- }
-
- DEBUG(10,("inherit_new_acl: check directory %s\n",
- parent_name));
-
- status = get_nt_acl_xattr_internal(handle,
- NULL,
- parent_name,
- (OWNER_SECURITY_INFORMATION |
- GROUP_SECURITY_INFORMATION |
- DACL_SECURITY_INFORMATION),
- &parent_desc);
- if (NT_STATUS_IS_OK(status)) {
- /* Create an inherited descriptor from the parent. */
-
- if (DEBUGLEVEL >= 10) {
- DEBUG(10,("inherit_new_acl: parent acl is:\n"));
- NDR_PRINT_DEBUG(security_descriptor, parent_desc);
- }
-
- status = se_create_child_secdesc(ctx,
- &psd,
- &size,
- parent_desc,
- &handle->conn->server_info->ptok->user_sids[PRIMARY_USER_SID_INDEX],
- &handle->conn->server_info->ptok->user_sids[PRIMARY_GROUP_SID_INDEX],
- container);
- if (!NT_STATUS_IS_OK(status)) {
- return status;
- }
-
- if (DEBUGLEVEL >= 10) {
- DEBUG(10,("inherit_new_acl: child acl is:\n"));
- NDR_PRINT_DEBUG(security_descriptor, psd);
- }
-
- } else {
- DEBUG(10,("inherit_new_acl: directory %s failed "
- "to get acl %s\n",
- parent_name,
- nt_errstr(status) ));
- }
-
- if (!psd || psd->dacl == NULL) {
- SMB_STRUCT_STAT sbuf;
- int ret;
-
- TALLOC_FREE(psd);
- if (fsp && !fsp->is_directory && fsp->fh->fd != -1) {
- ret = SMB_VFS_FSTAT(fsp, &sbuf);
- } else {
- if (fsp && fsp->posix_open) {
- ret = SMB_VFS_LSTAT(handle->conn,fname, &sbuf);
- } else {
- ret = SMB_VFS_STAT(handle->conn,fname, &sbuf);
- }
- }
- if (ret == -1) {
- return map_nt_error_from_unix(errno);
- }
- psd = default_file_sd(ctx, &sbuf);
- if (!psd) {
- return NT_STATUS_NO_MEMORY;
- }
-
- if (DEBUGLEVEL >= 10) {
- DEBUG(10,("inherit_new_acl: default acl is:\n"));
- NDR_PRINT_DEBUG(security_descriptor, psd);
- }
- }
-
- status = create_acl_blob(psd, &blob);
- if (!NT_STATUS_IS_OK(status)) {
- return status;
- }
- if (fsp) {
- return store_acl_blob_fsp(handle, fsp, &blob);
- } else {
- return store_acl_blob_pathname(handle, fname, &blob);
- }
-}
-
-/*********************************************************************
- Check ACL on open. For new files inherit from parent directory.
-*********************************************************************/
-
-static int open_acl_xattr(vfs_handle_struct *handle,
- struct smb_filename *smb_fname,
- files_struct *fsp,
- int flags,
- mode_t mode)
-{
- uint32_t access_granted = 0;
- struct security_descriptor *pdesc = NULL;
- bool file_existed = true;
- char *fname = NULL;
- NTSTATUS status;
-
- status = get_full_smb_filename(talloc_tos(), smb_fname,
- &fname);
- if (!NT_STATUS_IS_OK(status)) {
- errno = map_errno_from_nt_status(status);
- return -1;
- }
-
- status = get_nt_acl_xattr_internal(handle,
- NULL,
- fname,
- (OWNER_SECURITY_INFORMATION |
- GROUP_SECURITY_INFORMATION |
- DACL_SECURITY_INFORMATION),
- &pdesc);
- if (NT_STATUS_IS_OK(status)) {
- /* See if we can access it. */
- status = smb1_file_se_access_check(pdesc,
- handle->conn->server_info->ptok,
- fsp->access_mask,
- &access_granted);
- if (!NT_STATUS_IS_OK(status)) {
- DEBUG(10,("open_acl_xattr: file %s open "
- "refused with error %s\n",
- smb_fname_str_dbg(smb_fname),
- nt_errstr(status) ));
- errno = map_errno_from_nt_status(status);
- return -1;
- }
- } else if (NT_STATUS_EQUAL(status,NT_STATUS_OBJECT_NAME_NOT_FOUND)) {
- file_existed = false;
- }
-
- DEBUG(10,("open_acl_xattr: get_nt_acl_attr_internal for "
- "file %s returned %s\n",
- smb_fname_str_dbg(smb_fname),
- nt_errstr(status) ));
-
- fsp->fh->fd = SMB_VFS_NEXT_OPEN(handle, smb_fname, fsp, flags, mode);
-
- if (!file_existed && fsp->fh->fd != -1) {
- /* File was created. Inherit from parent directory. */
- string_set(&fsp->fsp_name, fname);
- inherit_new_acl(handle, fname, fsp, false);
- }
-
- return fsp->fh->fd;
-}
-
-static int mkdir_acl_xattr(vfs_handle_struct *handle, const char *path, mode_t mode)
-{
- int ret = SMB_VFS_NEXT_MKDIR(handle, path, mode);
-
- if (ret == -1) {
- return ret;
- }
- /* New directory - inherit from parent. */
- inherit_new_acl(handle, path, NULL, true);
- return ret;
-}
-
-/*********************************************************************
- Fetch a security descriptor given an fsp.
-*********************************************************************/
-
-static NTSTATUS fget_nt_acl_xattr(vfs_handle_struct *handle, files_struct *fsp,
- uint32 security_info, struct security_descriptor **ppdesc)
-{
- NTSTATUS status = get_nt_acl_xattr_internal(handle, fsp,
- NULL, security_info, ppdesc);
- if (NT_STATUS_IS_OK(status)) {
- if (DEBUGLEVEL >= 10) {
- DEBUG(10,("fget_nt_acl_xattr: returning xattr sd for file %s\n",
- fsp->fsp_name));
- NDR_PRINT_DEBUG(security_descriptor, *ppdesc);
- }
- return NT_STATUS_OK;
- }
-
- DEBUG(10,("fget_nt_acl_xattr: failed to get xattr sd for file %s, Error %s\n",
- fsp->fsp_name,
- nt_errstr(status) ));
-
- return SMB_VFS_NEXT_FGET_NT_ACL(handle, fsp,
- security_info, ppdesc);
-}
-
-/*********************************************************************
- Fetch a security descriptor given a pathname.
-*********************************************************************/
-
-static NTSTATUS get_nt_acl_xattr(vfs_handle_struct *handle,
- const char *name, uint32 security_info, struct security_descriptor **ppdesc)
-{
- NTSTATUS status = get_nt_acl_xattr_internal(handle, NULL,
- name, security_info, ppdesc);
- if (NT_STATUS_IS_OK(status)) {
- if (DEBUGLEVEL >= 10) {
- DEBUG(10,("get_nt_acl_xattr: returning xattr sd for file %s\n",
- name));
- NDR_PRINT_DEBUG(security_descriptor, *ppdesc);
- }
- return NT_STATUS_OK;
- }
-
- DEBUG(10,("get_nt_acl_xattr: failed to get xattr sd for file %s, Error %s\n",
- name,
- nt_errstr(status) ));
-
- return SMB_VFS_NEXT_GET_NT_ACL(handle, name,
- security_info, ppdesc);
-}
-
-/*********************************************************************
- Store a security descriptor given an fsp.
-*********************************************************************/
-
-static NTSTATUS fset_nt_acl_xattr(vfs_handle_struct *handle, files_struct *fsp,
- uint32 security_info_sent, const struct security_descriptor *psd)
-{
- NTSTATUS status;
- DATA_BLOB blob;
-
- if (DEBUGLEVEL >= 10) {
- DEBUG(10,("fset_nt_acl_xattr: incoming sd for file %s\n",
- fsp->fsp_name));
- NDR_PRINT_DEBUG(security_descriptor,
- CONST_DISCARD(struct security_descriptor *,psd));
- }
-
- status = SMB_VFS_NEXT_FSET_NT_ACL(handle, fsp, security_info_sent, psd);
- if (!NT_STATUS_IS_OK(status)) {
- return status;
- }
-
- /* Ensure owner and group are set. */
- if (!psd->owner_sid || !psd->group_sid) {
- int ret;
- SMB_STRUCT_STAT sbuf;
- DOM_SID owner_sid, group_sid;
- struct security_descriptor *nc_psd = dup_sec_desc(talloc_tos(), psd);
-
- if (!nc_psd) {
- return NT_STATUS_OK;
- }
- if (fsp->is_directory || fsp->fh->fd == -1) {
- if (fsp->posix_open) {
- ret = SMB_VFS_LSTAT(fsp->conn,fsp->fsp_name, &sbuf);
- } else {
- ret = SMB_VFS_STAT(fsp->conn,fsp->fsp_name, &sbuf);
- }
- } else {
- ret = SMB_VFS_FSTAT(fsp, &sbuf);
- }
- if (ret == -1) {
- /* Lower level acl set succeeded,
- * so still return OK. */
- return NT_STATUS_OK;
- }
- create_file_sids(&sbuf, &owner_sid, &group_sid);
- /* This is safe as nc_psd is discarded at fn exit. */
- nc_psd->owner_sid = &owner_sid;
- nc_psd->group_sid = &group_sid;
- security_info_sent |= (OWNER_SECURITY_INFORMATION|GROUP_SECURITY_INFORMATION);
- psd = nc_psd;
- }
-
-#if 0
- if ((security_info_sent & DACL_SECURITY_INFORMATION) &&
- psd->dacl != NULL &&
- (psd->type & (SE_DESC_DACL_AUTO_INHERITED|
- SE_DESC_DACL_AUTO_INHERIT_REQ))==
- (SE_DESC_DACL_AUTO_INHERITED|
- SE_DESC_DACL_AUTO_INHERIT_REQ) ) {
- struct security_descriptor *new_psd = NULL;
- status = append_parent_acl(fsp, psd, &new_psd);
- if (!NT_STATUS_IS_OK(status)) {
- /* Lower level acl set succeeded,
- * so still return OK. */
- return NT_STATUS_OK;
- }
- psd = new_psd;
- }
-#endif
-
- if (DEBUGLEVEL >= 10) {
- DEBUG(10,("fset_nt_acl_xattr: storing xattr sd for file %s\n",
- fsp->fsp_name));
- NDR_PRINT_DEBUG(security_descriptor,
- CONST_DISCARD(struct security_descriptor *,psd));
- }
- create_acl_blob(psd, &blob);
- store_acl_blob_fsp(handle, fsp, &blob);
-
- return NT_STATUS_OK;
-}
-
/*********************************************************************
Remove a Windows ACL - we're setting the underlying POSIX ACL.
*********************************************************************/
return ret;
}
-/* VFS operations structure */
-
-static vfs_op_tuple skel_op_tuples[] =
+static int connect_acl_xattr(struct vfs_handle_struct *handle,
+ const char *service,
+ const char *user)
{
- {SMB_VFS_OP(mkdir_acl_xattr), SMB_VFS_OP_MKDIR, SMB_VFS_LAYER_TRANSPARENT},
- {SMB_VFS_OP(open_acl_xattr), SMB_VFS_OP_OPEN, SMB_VFS_LAYER_TRANSPARENT},
+ int ret = SMB_VFS_NEXT_CONNECT(handle, service, user);
- /* NT File ACL operations */
+ if (ret < 0) {
+ return ret;
+ }
- {SMB_VFS_OP(fget_nt_acl_xattr),SMB_VFS_OP_FGET_NT_ACL,SMB_VFS_LAYER_TRANSPARENT},
- {SMB_VFS_OP(get_nt_acl_xattr), SMB_VFS_OP_GET_NT_ACL, SMB_VFS_LAYER_TRANSPARENT},
- {SMB_VFS_OP(fset_nt_acl_xattr),SMB_VFS_OP_FSET_NT_ACL,SMB_VFS_LAYER_TRANSPARENT},
+ /* Ensure we have "inherit acls = yes" if we're
+ * using this module. */
+ DEBUG(2,("connect_acl_xattr: setting 'inherit acls = true' "
+ "and 'dos filemode = true' for service %s\n",
+ service ));
- /* POSIX ACL operations. */
- {SMB_VFS_OP(sys_acl_set_file_xattr), SMB_VFS_OP_SYS_ACL_SET_FILE, SMB_VFS_LAYER_TRANSPARENT},
- {SMB_VFS_OP(sys_acl_set_fd_xattr), SMB_VFS_OP_SYS_ACL_SET_FD, SMB_VFS_LAYER_TRANSPARENT},
+ lp_do_parameter(SNUM(handle->conn), "inherit acls", "true");
+ lp_do_parameter(SNUM(handle->conn), "dos filemode", "true");
+
+ return 0;
+}
- {SMB_VFS_OP(NULL), SMB_VFS_OP_NOOP, SMB_VFS_LAYER_NOOP}
+static struct vfs_fn_pointers vfs_acl_xattr_fns = {
+ .connect_fn = connect_acl_xattr,
+ .mkdir = mkdir_acl_common,
+ .open = open_acl_common,
+ .fget_nt_acl = fget_nt_acl_common,
+ .get_nt_acl = get_nt_acl_common,
+ .fset_nt_acl = fset_nt_acl_common,
+ .sys_acl_set_file = sys_acl_set_file_xattr,
+ .sys_acl_set_fd = sys_acl_set_fd_xattr
};
NTSTATUS vfs_acl_xattr_init(void)
{
- return smb_register_vfs(SMB_VFS_INTERFACE_VERSION, "acl_xattr", skel_op_tuples);
+ return smb_register_vfs(SMB_VFS_INTERFACE_VERSION, "acl_xattr",
+ &vfs_acl_xattr_fns);
}