#include "auth/auth.h"
#include "ntvfs/ntvfs.h"
#include "libcli/wbclient/wbclient.h"
+#define TEVENT_DEPRECATED
+#include <tevent.h>
struct unixuid_private {
struct wbc_context *wbc_ctx;
return NT_STATUS_OK;
}
+static int unixuid_nesting_level;
+
+/*
+ called at the start and end of a tevent nesting loop. Needs to save/restore
+ unix security context
+ */
+static int unixuid_event_nesting_hook(struct tevent_context *ev,
+ void *private_data,
+ uint32_t level,
+ bool begin,
+ void *stack_ptr,
+ const char *location)
+{
+ struct unix_sec_ctx *sec_ctx;
+
+ if (unixuid_nesting_level == 0) {
+ /* we don't need to do anything unless we are nested
+ inside of a call in this module */
+ return 0;
+ }
+
+ if (begin) {
+ sec_ctx = save_unix_security(ev);
+ if (sec_ctx == NULL) {
+ DEBUG(0,("%s: Failed to save security context\n", location));
+ return -1;
+ }
+ *(struct unix_sec_ctx **)stack_ptr = sec_ctx;
+ if (seteuid(0) != 0 || setegid(0) != 0) {
+ DEBUG(0,("%s: Failed to change to root\n", location));
+ return -1;
+ }
+ } else {
+ /* called when we come out of a nesting level */
+ NTSTATUS status;
+
+ sec_ctx = *(struct unix_sec_ctx **)stack_ptr;
+ if (sec_ctx == NULL) {
+ /* this happens the first time this function
+ is called, as we install the hook while
+ inside an event in unixuid_connect() */
+ return 0;
+ }
+
+ sec_ctx = talloc_get_type_abort(sec_ctx, struct unix_sec_ctx);
+ status = set_unix_security(sec_ctx);
+ talloc_free(sec_ctx);
+ if (!NT_STATUS_IS_OK(status)) {
+ DEBUG(0,("%s: Failed to revert security context (%s)\n",
+ location, nt_errstr(status)));
+ return -1;
+ }
+ }
+
+ return 0;
+}
+
+
/*
form a unix_sec_ctx from the current security_token
*/
static NTSTATUS unixuid_setup_security(struct ntvfs_module_context *ntvfs,
struct ntvfs_request *req, struct unix_sec_ctx **sec)
{
- struct unixuid_private *private = ntvfs->private_data;
+ struct unixuid_private *priv = ntvfs->private_data;
struct security_token *token;
struct unix_sec_ctx *newsec;
NTSTATUS status;
- if (req->session_info == NULL) {
+ /* If we are asked to set up, but have not had a successful
+ * session setup or tree connect, then these may not be filled
+ * in. ACCESS_DENIED is the right error code here */
+ if (req->session_info == NULL || priv == NULL) {
return NT_STATUS_ACCESS_DENIED;
}
return NT_STATUS_NO_MEMORY;
}
- if (token == private->last_token) {
- newsec = private->last_sec_ctx;
+ if (token == priv->last_token) {
+ newsec = priv->last_sec_ctx;
} else {
status = nt_token_to_unix_security(ntvfs, req, token, &newsec);
if (!NT_STATUS_IS_OK(status)) {
talloc_free(*sec);
return status;
}
- if (private->last_sec_ctx) {
- talloc_free(private->last_sec_ctx);
+ if (priv->last_sec_ctx) {
+ talloc_free(priv->last_sec_ctx);
}
- private->last_sec_ctx = newsec;
- private->last_token = token;
- talloc_steal(private, newsec);
+ priv->last_sec_ctx = newsec;
+ priv->last_token = token;
+ talloc_steal(priv, newsec);
}
status = set_unix_security(newsec);
struct unix_sec_ctx *sec; \
status = unixuid_setup_security(ntvfs, req, &sec); \
NT_STATUS_NOT_OK_RETURN(status); \
+ unixuid_nesting_level++; \
status = ntvfs_next_##op args; \
+ unixuid_nesting_level--; \
status2 = set_unix_security(sec); \
talloc_free(sec); \
if (!NT_STATUS_IS_OK(status2)) smb_panic("Unable to reset security context"); \
connect to a share - used when a tree_connect operation comes in.
*/
static NTSTATUS unixuid_connect(struct ntvfs_module_context *ntvfs,
- struct ntvfs_request *req, const char *sharename)
+ struct ntvfs_request *req, union smb_tcon *tcon)
{
- struct unixuid_private *private;
+ struct unixuid_private *priv;
NTSTATUS status;
- private = talloc(ntvfs, struct unixuid_private);
- if (!private) {
+ priv = talloc(ntvfs, struct unixuid_private);
+ if (!priv) {
return NT_STATUS_NO_MEMORY;
}
- private->wbc_ctx = wbc_init(private, ntvfs->ctx->msg_ctx,
+ priv->wbc_ctx = wbc_init(priv, ntvfs->ctx->msg_ctx,
ntvfs->ctx->event_ctx);
- if (private->wbc_ctx == NULL) {
- talloc_free(private);
+ if (priv->wbc_ctx == NULL) {
+ talloc_free(priv);
return NT_STATUS_INTERNAL_ERROR;
}
- ntvfs->private_data = private;
- private->last_sec_ctx = NULL;
- private->last_token = NULL;
+ priv->last_sec_ctx = NULL;
+ priv->last_token = NULL;
+ ntvfs->private_data = priv;
+
+ tevent_loop_set_nesting_hook(ntvfs->ctx->event_ctx,
+ unixuid_event_nesting_hook,
+ &unixuid_nesting_level);
/* we don't use PASS_THRU_REQ here, as the connect operation runs with
root privileges. This allows the backends to setup any database
links they might need during the connect. */
- status = ntvfs_next_connect(ntvfs, req, sharename);
+ status = ntvfs_next_connect(ntvfs, req, tcon);
return status;
}
*/
static NTSTATUS unixuid_disconnect(struct ntvfs_module_context *ntvfs)
{
- struct unixuid_private *private = ntvfs->private_data;
+ struct unixuid_private *priv = ntvfs->private_data;
NTSTATUS status;
- talloc_free(private);
+ talloc_free(priv);
ntvfs->private_data = NULL;
status = ntvfs_next_disconnect(ntvfs);
static NTSTATUS unixuid_logoff(struct ntvfs_module_context *ntvfs,
struct ntvfs_request *req)
{
- struct unixuid_private *private = ntvfs->private_data;
+ struct unixuid_private *priv = ntvfs->private_data;
NTSTATUS status;
PASS_THRU_REQ(ntvfs, req, logoff, (ntvfs, req));
- private->last_token = NULL;
+ priv->last_token = NULL;
return status;
}
*/
static NTSTATUS unixuid_async_setup(struct ntvfs_module_context *ntvfs,
struct ntvfs_request *req,
- void *private)
+ void *private_data)
{
NTSTATUS status;
- PASS_THRU_REQ(ntvfs, req, async_setup, (ntvfs, req, private));
+ PASS_THRU_REQ(ntvfs, req, async_setup, (ntvfs, req, private_data));
return status;
}
git.samba.org / kai / samba-autobuild / .git / blobdiff