first public release of samba4 code

(This used to be commit b0510b5428b3461aeb9bbe3cc95f62fc73e2b97f)

1 files changed, 265 insertions, 0 deletions

diff --git a/source4/rpc_server/srv_lsa_hnd.c b/source4/rpc_server/srv_lsa_hnd.c
new file mode 100644
index 0000000000..814fa60aab
--- /dev/null
+++ b/source4/rpc_server/srv_lsa_hnd.c
@@ -0,0 +1,265 @@
+/* 
+ *  Unix SMB/CIFS implementation.
+ *  RPC Pipe client / server routines
+ *  Copyright (C) Andrew Tridgell              1992-1997,
+ *  Copyright (C) Luke Kenneth Casson Leighton 1996-1997,
+ *  Copyright (C) Jeremy Allison			   2001.
+ *  
+ *  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 2 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, write to the Free Software
+ *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include "includes.h"
+
+#undef DBGC_CLASS
+#define DBGC_CLASS DBGC_RPC_SRV
+
+/* This is the max handles across all instances of a pipe name. */
+#ifndef MAX_OPEN_POLS
+#define MAX_OPEN_POLS 1024
+#endif
+
+/****************************************************************************
+ Hack as handles need to be persisant over lsa pipe closes so long as a samr
+ pipe is open. JRA.
+****************************************************************************/
+
+static BOOL is_samr_lsa_pipe(const char *pipe_name)
+{
+	return (strstr(pipe_name, "samr") || strstr(pipe_name, "lsa"));
+}
+
+/****************************************************************************
+ Initialise a policy handle list on a pipe. Handle list is shared between all
+ pipes of the same name.
+****************************************************************************/
+
+BOOL init_pipe_handle_list(pipes_struct *p, char *pipe_name)
+{
+	pipes_struct *plist = get_first_internal_pipe();
+	struct handle_list *hl = NULL;
+
+	for (plist = get_first_internal_pipe(); plist; plist = get_next_internal_pipe(plist)) {
+		if (strequal( plist->name, pipe_name) ||
+				(is_samr_lsa_pipe(plist->name) && is_samr_lsa_pipe(pipe_name))) {
+			if (!plist->pipe_handles) {
+				pstring msg;
+				slprintf(msg, sizeof(msg)-1, "init_pipe_handles: NULL pipe_handle pointer in pipe %s",
+						pipe_name );
+				smb_panic(msg);
+			}
+			hl = plist->pipe_handles;
+			break;
+		}
+	}
+
+	if (!hl) {
+		/*
+		 * No handle list for this pipe (first open of pipe).
+		 * Create list.
+		 */
+
+		if ((hl = (struct handle_list *)malloc(sizeof(struct handle_list))) == NULL)
+			return False;
+		ZERO_STRUCTP(hl);
+
+		DEBUG(10,("init_pipe_handles: created handle list for pipe %s\n", pipe_name ));
+	}
+
+	/*
+	 * One more pipe is using this list.
+	 */
+
+	hl->pipe_ref_count++;
+
+	/*
+	 * Point this pipe at this list.
+	 */
+
+	p->pipe_handles = hl;
+
+	DEBUG(10,("init_pipe_handles: pipe_handles ref count = %u for pipe %s\n",
+			p->pipe_handles->pipe_ref_count, pipe_name ));
+
+	return True;
+}
+
+/****************************************************************************
+  find first available policy slot.  creates a policy handle for you.
+****************************************************************************/
+
+BOOL create_policy_hnd(pipes_struct *p, POLICY_HND *hnd, void (*free_fn)(void *), void *data_ptr)
+{
+	static uint32 pol_hnd_low  = 0;
+	static uint32 pol_hnd_high = 0;
+
+	struct policy *pol;
+
+	if (p->pipe_handles->count > MAX_OPEN_POLS) {
+		DEBUG(0,("create_policy_hnd: ERROR: too many handles (%d) on this pipe.\n",
+				(int)p->pipe_handles->count));
+		return False;
+	}
+
+	pol = (struct policy *)malloc(sizeof(*p));
+	if (!pol) {
+		DEBUG(0,("create_policy_hnd: ERROR: out of memory!\n"));
+		return False;
+	}
+
+	ZERO_STRUCTP(pol);
+
+	pol->data_ptr = data_ptr;
+	pol->free_fn = free_fn;
+
+	pol_hnd_low++;
+	if (pol_hnd_low == 0)
+		(pol_hnd_high)++;
+
+	SIVAL(&pol->pol_hnd.data1, 0 , 0);  /* first bit must be null */
+	SIVAL(&pol->pol_hnd.data2, 0 , pol_hnd_low ); /* second bit is incrementing */
+	SSVAL(&pol->pol_hnd.data3, 0 , pol_hnd_high); /* second bit is incrementing */
+	SSVAL(&pol->pol_hnd.data4, 0 , (pol_hnd_high>>16)); /* second bit is incrementing */
+	SIVAL(pol->pol_hnd.data5, 0, time(NULL)); /* something random */
+	SIVAL(pol->pol_hnd.data5, 4, sys_getpid()); /* something more random */
+
+	DLIST_ADD(p->pipe_handles->Policy, pol);
+	p->pipe_handles->count++;
+
+	*hnd = pol->pol_hnd;
+	
+	DEBUG(4,("Opened policy hnd[%d] ", (int)p->pipe_handles->count));
+	dump_data(4, (char *)hnd, sizeof(*hnd));
+
+	return True;
+}
+
+/****************************************************************************
+  find policy by handle - internal version.
+****************************************************************************/
+
+static struct policy *find_policy_by_hnd_internal(pipes_struct *p, POLICY_HND *hnd, void **data_p)
+{
+	struct policy *pol;
+	size_t i;
+
+	if (data_p)
+		*data_p = NULL;
+
+	for (i = 0, pol=p->pipe_handles->Policy;pol;pol=pol->next, i++) {
+		if (memcmp(&pol->pol_hnd, hnd, sizeof(*hnd)) == 0) {
+			DEBUG(4,("Found policy hnd[%d] ", (int)i));
+			dump_data(4, (char *)hnd, sizeof(*hnd));
+			if (data_p)
+				*data_p = pol->data_ptr;
+			return pol;
+		}
+	}
+
+	DEBUG(4,("Policy not found: "));
+	dump_data(4, (char *)hnd, sizeof(*hnd));
+
+	p->bad_handle_fault_state = True;
+
+	return NULL;
+}
+
+/****************************************************************************
+  find policy by handle
+****************************************************************************/
+
+BOOL find_policy_by_hnd(pipes_struct *p, POLICY_HND *hnd, void **data_p)
+{
+	return find_policy_by_hnd_internal(p, hnd, data_p) == NULL ? False : True;
+}
+
+/****************************************************************************
+  Close a policy.
+****************************************************************************/
+
+BOOL close_policy_hnd(pipes_struct *p, POLICY_HND *hnd)
+{
+	struct policy *pol = find_policy_by_hnd_internal(p, hnd, NULL);
+
+	if (!pol) {
+		DEBUG(3,("Error closing policy\n"));
+		return False;
+	}
+
+	DEBUG(3,("Closed policy\n"));
+
+	if (pol->free_fn && pol->data_ptr)
+		(*pol->free_fn)(pol->data_ptr);
+
+	p->pipe_handles->count--;
+
+	DLIST_REMOVE(p->pipe_handles->Policy, pol);
+
+	ZERO_STRUCTP(pol);
+
+	SAFE_FREE(pol);
+
+	return True;
+}
+
+/****************************************************************************
+ Close a pipe - free the handle list if it was the last pipe reference.
+****************************************************************************/
+
+void close_policy_by_pipe(pipes_struct *p)
+{
+	p->pipe_handles->pipe_ref_count--;
+
+	if (p->pipe_handles->pipe_ref_count == 0) {
+		/*
+		 * Last pipe open on this list - free the list.
+		 */
+		while (p->pipe_handles->Policy)
+			close_policy_hnd(p, &p->pipe_handles->Policy->pol_hnd);
+
+		p->pipe_handles->Policy = NULL;
+		p->pipe_handles->count = 0;
+
+		SAFE_FREE(p->pipe_handles);
+		DEBUG(10,("close_policy_by_pipe: deleted handle list for pipe %s\n", p->name ));
+	}
+}
+
+/*******************************************************************
+Shall we allow access to this rpc?  Currently this function
+implements the 'restrict anonymous' setting by denying access to
+anonymous users if the restrict anonymous level is > 0.  Further work
+will be checking a security descriptor to determine whether a user
+token has enough access to access the pipe.
+********************************************************************/
+
+BOOL pipe_access_check(pipes_struct *p)
+{
+	/* Don't let anonymous users access this RPC if restrict
+	   anonymous > 0 */
+
+	if (lp_restrict_anonymous() > 0) {
+		user_struct *user = get_valid_user_struct(p->vuid);
+
+		if (!user) {
+			DEBUG(3, ("invalid vuid %d\n", p->vuid));
+			return False;
+		}
+
+		if (user->guest)
+			return False;
+	}
+
+	return True;
+}