From 283b74fce595642fb2e2a2fad87c2de9c3bc5403 Mon Sep 17 00:00:00 2001
From: Volker Lendecke <vlendec@samba.org>
Date: Mon, 17 Jul 2006 19:50:59 +0000
Subject: r17096: Simplify share_access_check a bit: It takes the sharename
 instead of the snum, and the decision which token to use (conn or vuser) does
 not really belong here, it is better done in the two places where this is
 called.

Volker
(This used to be commit 0a138888adf7a0f04a38cd911e797e1a379e908b)
---
 source3/rpc_server/srv_srvsvc_nt.c | 24 +++++++++---------------
 source3/smbd/service.c             |  9 +++++++--
 source3/smbd/uid.c                 |  9 +++++++--
 3 files changed, 23 insertions(+), 19 deletions(-)

diff --git a/source3/rpc_server/srv_srvsvc_nt.c b/source3/rpc_server/srv_srvsvc_nt.c
index 50df99901b..19099b931e 100644
--- a/source3/rpc_server/srv_srvsvc_nt.c
+++ b/source3/rpc_server/srv_srvsvc_nt.c
@@ -320,36 +320,30 @@ static void map_generic_share_sd_bits(SEC_DESC *psd)
  Can this user access with share with the required permissions ?
 ********************************************************************/
 
-BOOL share_access_check(connection_struct *conn, int snum, user_struct *vuser, uint32 desired_access)
+BOOL share_access_check(const NT_USER_TOKEN *token, const char *sharename,
+			uint32 desired_access)
 {
 	uint32 granted;
 	NTSTATUS status;
 	TALLOC_CTX *mem_ctx = NULL;
 	SEC_DESC *psd = NULL;
 	size_t sd_size;
-	NT_USER_TOKEN *token = NULL;
 	BOOL ret = True;
 
-	mem_ctx = talloc_init("share_access_check");
-	if (mem_ctx == NULL)
+	if (!(mem_ctx = talloc_init("share_access_check"))) {
 		return False;
+	}
 
-	psd = get_share_security(mem_ctx, lp_servicename(snum), &sd_size);
-
-	if (!psd)
-		goto out;
+	psd = get_share_security(mem_ctx, sharename, &sd_size);
 
-	if (conn->nt_user_token)
-		token = conn->nt_user_token;
-	else 
-		token = vuser->nt_user_token;
+	if (!psd) {
+		TALLOC_FREE(mem_ctx);
+		return True;
+	}
 
 	ret = se_access_check(psd, token, desired_access, &granted, &status);
 
-out:
-
 	talloc_destroy(mem_ctx);
-
 	return ret;
 }
 
diff --git a/source3/smbd/service.c b/source3/smbd/service.c
index 9dcb8a354f..395114592a 100644
--- a/source3/smbd/service.c
+++ b/source3/smbd/service.c
@@ -767,11 +767,16 @@ static connection_struct *make_connection_snum(int snum, user_struct *vuser,
 	 */
 
 	{
-		BOOL can_write = share_access_check(conn, snum, vuser,
+		NT_USER_TOKEN *token = conn->nt_user_token ?
+			conn->nt_user_token : vuser->nt_user_token;
+
+		BOOL can_write = share_access_check(token,
+						    lp_servicename(snum),
 						    FILE_WRITE_DATA);
 
 		if (!can_write) {
-			if (!share_access_check(conn, snum, vuser,
+			if (!share_access_check(token,
+						lp_servicename(snum),
 						FILE_READ_DATA)) {
 				/* No access, read or write. */
 				DEBUG(0,("make_connection: connection to %s "
diff --git a/source3/smbd/uid.c b/source3/smbd/uid.c
index 48d7f590c3..89d082e1ac 100644
--- a/source3/smbd/uid.c
+++ b/source3/smbd/uid.c
@@ -87,6 +87,7 @@ static BOOL check_user_ok(connection_struct *conn, user_struct *vuser,int snum)
 	unsigned int i;
 	struct vuid_cache_entry *ent = NULL;
 	BOOL readonly_share;
+	NT_USER_TOKEN *token;
 
 	for (i=0;i<conn->vuid_cache.entries && i< VUID_CACHE_SIZE;i++) {
 		if (conn->vuid_cache.array[i].vuid == vuser->vuid) {
@@ -104,8 +105,12 @@ static BOOL check_user_ok(connection_struct *conn, user_struct *vuser,int snum)
 						      vuser->nt_user_token,
 						      SNUM(conn));
 
+	token = conn->nt_user_token ?
+		conn->nt_user_token : vuser->nt_user_token;
+
 	if (!readonly_share &&
-	    !share_access_check(conn, snum, vuser, FILE_WRITE_DATA)) {
+	    !share_access_check(token, lp_servicename(snum),
+				FILE_WRITE_DATA)) {
 		/* smb.conf allows r/w, but the security descriptor denies
 		 * write. Fall back to looking at readonly. */
 		readonly_share = True;
@@ -113,7 +118,7 @@ static BOOL check_user_ok(connection_struct *conn, user_struct *vuser,int snum)
 			 "security descriptor\n"));
 	}
 
-	if (!share_access_check(conn, snum, vuser,
+	if (!share_access_check(token, lp_servicename(snum),
 				readonly_share ?
 				FILE_READ_DATA : FILE_WRITE_DATA)) {
 		return False;
-- 
cgit