#undef DBGC_CLASS
#define DBGC_CLASS DBGC_VFS
+static NTSTATUS create_acl_blob(const struct security_descriptor *psd,
+ DATA_BLOB *pblob,
+ uint8_t hash[16]);
+
+#define HASH_SECURITY_INFO (OWNER_SECURITY_INFORMATION | \
+ GROUP_SECURITY_INFORMATION | \
+ DACL_SECURITY_INFORMATION | \
+ SACL_SECURITY_INFORMATION)
+
+/*******************************************************************
+ Hash a security descriptor.
+*******************************************************************/
+
+static NTSTATUS hash_sd(struct security_descriptor *psd,
+ uint8_t hash[16])
+{
+ DATA_BLOB blob;
+ struct MD5Context tctx;
+ NTSTATUS status;
+
+ memset(hash, '\0', 16);
+ status = create_acl_blob(psd, &blob, hash);
+ if (!NT_STATUS_IS_OK(status)) {
+ return status;
+ }
+ MD5Init(&tctx);
+ MD5Update(&tctx, blob.data, blob.length);
+ MD5Final(hash, &tctx);
+ return NT_STATUS_OK;
+}
+
/*******************************************************************
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)
+ struct security_descriptor **ppdesc,
+ uint8_t hash[16])
{
TALLOC_CTX *ctx = talloc_tos();
struct xattr_NTACL xacl;
return NT_STATUS_REVISION_MISMATCH;
}
- *ppdesc = make_sec_desc(ctx, SEC_DESC_REVISION, xacl.info.sd_ts->sd->type | SEC_DESC_SELF_RELATIVE,
+ *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_ts->sd->owner_sid : NULL,
+ ? xacl.info.sd_hs->sd->owner_sid : NULL,
(security_info & GROUP_SECURITY_INFORMATION)
- ? xacl.info.sd_ts->sd->group_sid : NULL,
+ ? xacl.info.sd_hs->sd->group_sid : NULL,
(security_info & SACL_SECURITY_INFORMATION)
- ? xacl.info.sd_ts->sd->sacl : NULL,
+ ? xacl.info.sd_hs->sd->sacl : NULL,
(security_info & DACL_SECURITY_INFORMATION)
- ? xacl.info.sd_ts->sd->dacl : NULL,
+ ? xacl.info.sd_hs->sd->dacl : NULL,
&sd_size);
+ memcpy(hash, xacl.info.sd_hs->hash, 16);
TALLOC_FREE(xacl.info.sd);
return (*ppdesc != NULL) ? NT_STATUS_OK : NT_STATUS_NO_MEMORY;
Create a DATA_BLOB from a security descriptor.
*******************************************************************/
-static NTSTATUS create_acl_blob(const struct security_descriptor *psd, DATA_BLOB *pblob)
+static NTSTATUS create_acl_blob(const struct security_descriptor *psd,
+ DATA_BLOB *pblob,
+ uint8_t hash[16])
{
struct xattr_NTACL xacl;
- struct security_descriptor_timestamp sd_ts;
+ struct security_descriptor_hash sd_hs;
enum ndr_err_code ndr_err;
TALLOC_CTX *ctx = talloc_tos();
- struct timespec curr = timespec_current();
ZERO_STRUCT(xacl);
- ZERO_STRUCT(sd_ts);
-
- /* Horrid hack as setting an xattr changes the ctime
- * on Linux. This gives a race of 1 second during
- * which we would not see a POSIX ACL set.
- */
- curr.tv_sec += 1;
+ ZERO_STRUCT(sd_hs);
xacl.version = 2;
- xacl.info.sd_ts = &sd_ts;
- xacl.info.sd_ts->sd = CONST_DISCARD(struct security_descriptor *, psd);
- unix_timespec_to_nt_time(&xacl.info.sd_ts->last_changed, curr);
-
- DEBUG(10, ("create_acl_blob: timestamp stored as %s\n",
- timestring(ctx, curr.tv_sec) ));
+ xacl.info.sd_hs = &sd_hs;
+ xacl.info.sd_hs->sd = CONST_DISCARD(struct security_descriptor *, psd);
+ memcpy(&xacl.info.sd_hs->hash[0], hash, 16);
ndr_err = ndr_push_struct_blob(
pblob, ctx, NULL, &xacl,
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);
}
uint32 security_info,
struct security_descriptor **ppdesc)
{
- TALLOC_CTX *ctx = talloc_tos();
DATA_BLOB blob;
NTSTATUS status;
+ uint8_t hash[16];
+ uint8_t hash_tmp[16];
+ struct security_descriptor *pdesc_next = NULL;
if (fsp && name == NULL) {
- name = fsp->fsp_name;
+ name = fsp->fsp_name->base_name;
}
DEBUG(10, ("get_nt_acl_xattr_internal: name=%s\n", name));
- status = get_acl_blob(ctx, handle, fsp, name, &blob);
+ status = get_acl_blob(talloc_tos(), 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);
+ status = parse_acl_blob(&blob, security_info, ppdesc, &hash[0]);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(10, ("parse_acl_blob returned %s\n",
nt_errstr(status)));
return status;
}
+ /* If there was no stored hash, don't check. */
+ memset(&hash_tmp[0], '\0', 16);
+ if (memcmp(&hash[0], &hash_tmp[0], 16) == 0) {
+ /* No hash, goto return blob sd. */
+ goto out;
+ }
+
+ /* Get the full underlying sd, then hash. */
+ if (fsp) {
+ status = SMB_VFS_NEXT_FGET_NT_ACL(handle,
+ fsp,
+ HASH_SECURITY_INFO,
+ &pdesc_next);
+ } else {
+ status = SMB_VFS_NEXT_GET_NT_ACL(handle,
+ name,
+ HASH_SECURITY_INFO,
+ &pdesc_next);
+ }
+
+ if (!NT_STATUS_IS_OK(status)) {
+ goto out;
+ }
+
+ status = hash_sd(pdesc_next, hash_tmp);
+ if (!NT_STATUS_IS_OK(status)) {
+ goto out;
+ }
+
+ if (memcmp(&hash[0], &hash_tmp[0], 16) == 0) {
+ TALLOC_FREE(pdesc_next);
+ /* Hash matches, return blob sd. */
+ goto out;
+ }
+
+ /* Hash doesn't match, return underlying sd. */
+
+ if (!(security_info & OWNER_SECURITY_INFORMATION)) {
+ pdesc_next->owner_sid = NULL;
+ }
+ if (!(security_info & GROUP_SECURITY_INFORMATION)) {
+ pdesc_next->group_sid = NULL;
+ }
+ if (!(security_info & DACL_SECURITY_INFORMATION)) {
+ pdesc_next->dacl = NULL;
+ }
+ if (!(security_info & SACL_SECURITY_INFORMATION)) {
+ pdesc_next->sacl = NULL;
+ }
+
+ TALLOC_FREE(*ppdesc);
+ *ppdesc = pdesc_next;
+
+ out:
+
TALLOC_FREE(blob.data);
return status;
}
struct security_ace *pace = NULL;
struct security_acl *pacl = NULL;
- uid_to_sid(&owner_sid, psbuf->st_uid);
- gid_to_sid(&group_sid, psbuf->st_gid);
+ 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) {
*********************************************************************/
static NTSTATUS inherit_new_acl(vfs_handle_struct *handle,
- const char *fname,
+ struct smb_filename *smb_fname,
files_struct *fsp,
bool container)
{
NTSTATUS status;
struct security_descriptor *parent_desc = NULL;
struct security_descriptor *psd = NULL;
+ struct security_descriptor *pdesc_next = NULL;
DATA_BLOB blob;
size_t size;
char *parent_name;
+ uint8_t hash[16];
- if (!parent_dirname_talloc(ctx,
- fname,
- &parent_name,
- NULL)) {
+ if (!parent_dirname(ctx, smb_fname->base_name, &parent_name, NULL)) {
return NT_STATUS_NO_MEMORY;
}
}
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);
+ ret = SMB_VFS_FSTAT(fsp, &smb_fname->st);
} else {
- ret = SMB_VFS_STAT(handle->conn,fname, &sbuf);
+ if (fsp && fsp->posix_open) {
+ ret = SMB_VFS_LSTAT(handle->conn, smb_fname);
+ } else {
+ ret = SMB_VFS_STAT(handle->conn, smb_fname);
+ }
}
if (ret == -1) {
return map_nt_error_from_unix(errno);
}
- psd = default_file_sd(ctx, &sbuf);
+ psd = default_file_sd(ctx, &smb_fname->st);
if (!psd) {
return NT_STATUS_NO_MEMORY;
}
}
}
- status = create_acl_blob(psd, &blob);
+ /* Object exists. Read the current SD to get the hash. */
+ if (fsp) {
+ status = SMB_VFS_NEXT_FGET_NT_ACL(handle,
+ fsp,
+ HASH_SECURITY_INFO,
+ &pdesc_next);
+ } else {
+ status = SMB_VFS_NEXT_GET_NT_ACL(handle,
+ smb_fname->base_name,
+ HASH_SECURITY_INFO,
+ &pdesc_next);
+ }
+
+ if (!NT_STATUS_IS_OK(status)) {
+ return status;
+ }
+
+ status = hash_sd(pdesc_next, hash);
+ if (!NT_STATUS_IS_OK(status)) {
+ return status;
+ }
+ status = create_acl_blob(psd, &blob, hash);
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);
+ return store_acl_blob_pathname(handle, smb_fname->base_name,
+ &blob);
}
}
*********************************************************************/
static int open_acl_xattr(vfs_handle_struct *handle,
- const char *fname,
+ 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;
- NTSTATUS status = get_nt_acl_xattr_internal(handle,
+ char *fname = NULL;
+ NTSTATUS status;
+
+ if (fsp->base_fsp) {
+ /* Stream open. Base filename open already did the ACL check. */
+ DEBUG(10,("open_acl_xattr: stream open on %s\n",
+ smb_fname_str_dbg(smb_fname) ));
+ return SMB_VFS_NEXT_OPEN(handle, smb_fname, fsp, flags, mode);
+ }
+
+ 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 |
if (!NT_STATUS_IS_OK(status)) {
DEBUG(10,("open_acl_xattr: file %s open "
"refused with error %s\n",
- fname,
+ smb_fname_str_dbg(smb_fname),
nt_errstr(status) ));
errno = map_errno_from_nt_status(status);
return -1;
DEBUG(10,("open_acl_xattr: get_nt_acl_attr_internal for "
"file %s returned %s\n",
- fname,
+ smb_fname_str_dbg(smb_fname),
nt_errstr(status) ));
- fsp->fh->fd = SMB_VFS_NEXT_OPEN(handle, fname, fsp, flags, mode);
+ 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);
+ status = fsp_set_smb_fname(fsp, smb_fname);
+ if (!NT_STATUS_IS_OK(status)) {
+ errno = map_errno_from_nt_status(status);
+ return -1;
+ }
+ inherit_new_acl(handle, smb_fname, fsp, false);
}
return fsp->fh->fd;
static int mkdir_acl_xattr(vfs_handle_struct *handle, const char *path, mode_t mode)
{
+ struct smb_filename *smb_fname = NULL;
int ret = SMB_VFS_NEXT_MKDIR(handle, path, mode);
+ NTSTATUS status;
if (ret == -1) {
return ret;
}
+
+ status = create_synthetic_smb_fname(talloc_tos(), path, NULL, NULL,
+ &smb_fname);
+ if (!NT_STATUS_IS_OK(status)) {
+ errno = map_errno_from_nt_status(status);
+ return -1;
+ }
+
/* New directory - inherit from parent. */
- inherit_new_acl(handle, path, NULL, true);
+ inherit_new_acl(handle, smb_fname, NULL, true);
+ TALLOC_FREE(smb_fname);
return ret;
}
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,
+ return 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);
}
/*********************************************************************
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,
+ return 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);
}
/*********************************************************************
{
NTSTATUS status;
DATA_BLOB blob;
+ struct security_descriptor *pdesc_next = NULL;
+ uint8_t hash[16];
if (DEBUGLEVEL >= 10) {
DEBUG(10,("fset_nt_acl_xattr: incoming sd for file %s\n",
- fsp->fsp_name));
+ fsp_str_dbg(fsp)));
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);
return NT_STATUS_OK;
}
if (fsp->is_directory || fsp->fh->fd == -1) {
- ret = SMB_VFS_STAT(fsp->conn,fsp->fsp_name, &sbuf);
+ if (fsp->posix_open) {
+ ret = SMB_VFS_LSTAT(fsp->conn, fsp->fsp_name);
+ } else {
+ ret = SMB_VFS_STAT(fsp->conn, fsp->fsp_name);
+ }
} else {
- ret = SMB_VFS_FSTAT(fsp, &sbuf);
+ ret = SMB_VFS_FSTAT(fsp, &fsp->fsp_name->st);
}
if (ret == -1) {
/* Lower level acl set succeeded,
* so still return OK. */
return NT_STATUS_OK;
}
- create_file_sids(&sbuf, &owner_sid, &group_sid);
+ create_file_sids(&fsp->fsp_name->st, &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;
psd = nc_psd;
}
+ status = SMB_VFS_NEXT_FSET_NT_ACL(handle, fsp, security_info_sent, psd);
+ if (!NT_STATUS_IS_OK(status)) {
+ return status;
+ }
+
+ /* Get the full underlying sd, then hash. */
+ status = SMB_VFS_NEXT_FGET_NT_ACL(handle,
+ fsp,
+ HASH_SECURITY_INFO,
+ &pdesc_next);
+
+ if (!NT_STATUS_IS_OK(status)) {
+ return status;
+ }
+
+ status = hash_sd(pdesc_next, hash);
+ if (!NT_STATUS_IS_OK(status)) {
+ return status;
+ }
+
+#if 0
if ((security_info_sent & DACL_SECURITY_INFORMATION) &&
psd->dacl != NULL &&
(psd->type & (SE_DESC_DACL_AUTO_INHERITED|
}
psd = new_psd;
}
+#endif
if (DEBUGLEVEL >= 10) {
DEBUG(10,("fset_nt_acl_xattr: storing xattr sd for file %s\n",
- fsp->fsp_name));
+ fsp_str_dbg(fsp)));
NDR_PRINT_DEBUG(security_descriptor,
CONST_DISCARD(struct security_descriptor *,psd));
}
- create_acl_blob(psd, &blob);
+ create_acl_blob(psd, &blob, hash);
store_acl_blob_fsp(handle, fsp, &blob);
return NT_STATUS_OK;
}
+/*********************************************************************
+ Remove a Windows ACL - we're setting the underlying POSIX ACL.
+*********************************************************************/
+
+static int sys_acl_set_file_xattr(vfs_handle_struct *handle,
+ const char *name,
+ SMB_ACL_TYPE_T type,
+ SMB_ACL_T theacl)
+{
+ int ret = SMB_VFS_NEXT_SYS_ACL_SET_FILE(handle,
+ name,
+ type,
+ theacl);
+ if (ret == -1) {
+ return -1;
+ }
+
+ become_root();
+ SMB_VFS_REMOVEXATTR(handle->conn, name, XATTR_NTACL_NAME);
+ unbecome_root();
+
+ return ret;
+}
+
+/*********************************************************************
+ Remove a Windows ACL - we're setting the underlying POSIX ACL.
+*********************************************************************/
+
+static int sys_acl_set_fd_xattr(vfs_handle_struct *handle,
+ files_struct *fsp,
+ SMB_ACL_T theacl)
+{
+ int ret = SMB_VFS_NEXT_SYS_ACL_SET_FD(handle,
+ fsp,
+ theacl);
+ if (ret == -1) {
+ return -1;
+ }
+
+ become_root();
+ SMB_VFS_FREMOVEXATTR(fsp, XATTR_NTACL_NAME);
+ unbecome_root();
+
+ return ret;
+}
+
/* VFS operations structure */
static vfs_op_tuple skel_op_tuples[] =
{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},
+ /* 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},
+
{SMB_VFS_OP(NULL), SMB_VFS_OP_NOOP, SMB_VFS_LAYER_NOOP}
};
git.samba.org / samba.git / blobdiff