r3982: split out the sid -> uid/gid mapping routines into a ntvfs_sidmap

subsystem. This is in preparation for adding better default ACL
generation in pvfs, which will require uid/gid -> sid mapping.
(This used to be commit b31108e49247495d98cf7c12ee303b12a9e44e92)

5 files changed, 237 insertions, 160 deletions

diff --git a/source4/ntvfs/common/sidmap.c b/source4/ntvfs/common/sidmap.c
new file mode 100644
index 0000000000..ac3aaaecaf
--- /dev/null
+++ b/source4/ntvfs/common/sidmap.c
@@ -0,0 +1,212 @@
+/* 
+   Unix SMB/CIFS implementation.
+
+   mapping routines for SID <-> unix uid/gid
+
+   Copyright (C) Andrew Tridgell 2004
+   
+   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"
+
+/*
+  private context for sid mapping routines
+*/
+struct sidmap_context {
+	void *samctx;
+};
+
+/*
+  open a sidmap context - use talloc_free to close
+*/
+struct sidmap_context *sidmap_open(TALLOC_CTX *mem_ctx)
+{
+	struct sidmap_context *sidmap;
+	sidmap = talloc_p(mem_ctx, struct sidmap_context);
+	if (sidmap == NULL) {
+		return NULL;
+	}
+	sidmap->samctx = samdb_connect(sidmap);
+	if (sidmap->samctx == NULL) {
+		talloc_free(sidmap);
+		return NULL;
+	}
+
+	return sidmap;
+}
+
+/*
+  map a sid to a unix uid
+*/
+NTSTATUS sidmap_sid_to_unixuid(struct sidmap_context *sidmap, 
+			       struct dom_sid *sid, uid_t *uid)
+{
+	const char *attrs[] = { "sAMAccountName", "unixID", 
+				"unixName", "sAMAccountType", NULL };
+	int ret;
+	const char *s;
+	void *ctx;
+	struct ldb_message **res;
+	const char *sidstr;
+	uint_t atype;
+
+	ctx = talloc(sidmap, 0);
+	sidstr = dom_sid_string(ctx, sid);
+	if (sidstr == NULL) {
+		talloc_free(ctx);
+		return NT_STATUS_NO_MEMORY;
+	}
+
+	ret = samdb_search(sidmap->samctx, ctx, NULL, &res, attrs, 
+			   "objectSid=%s", sidstr);
+	if (ret != 1) {
+		DEBUG(0,("sid_to_unixuid: unable to find sam record for sid %s\n", sidstr));
+		talloc_free(ctx);
+		return NT_STATUS_ACCESS_DENIED;
+	}
+
+	/* make sure its a user, not a group */
+	atype = samdb_result_uint(res[0], "sAMAccountType", 0);
+	if (atype && (!(atype & ATYPE_ACCOUNT))) {
+		DEBUG(0,("sid_to_unixuid: sid %s is not an account!\n", sidstr));
+		talloc_free(ctx);
+		return NT_STATUS_ACCESS_DENIED;
+	}
+
+	/* first try to get the uid directly */
+	s = samdb_result_string(res[0], "unixID", NULL);
+	if (s != NULL) {
+		*uid = strtoul(s, NULL, 0);
+		talloc_free(ctx);
+		return NT_STATUS_OK;
+	}
+
+	/* next try via the UnixName attribute */
+	s = samdb_result_string(res[0], "unixName", NULL);
+	if (s != NULL) {
+		struct passwd *pwd = getpwnam(s);
+		if (!pwd) {
+			DEBUG(0,("unixName %s for sid %s does not exist as a local user\n", s, sidstr));
+			talloc_free(ctx);
+			return NT_STATUS_ACCESS_DENIED;
+		}
+		*uid = pwd->pw_uid;
+		talloc_free(ctx);
+		return NT_STATUS_OK;
+	}
+
+	/* finally try via the sAMAccountName attribute */
+	s = samdb_result_string(res[0], "sAMAccountName", NULL);
+	if (s != NULL) {
+		struct passwd *pwd = getpwnam(s);
+		if (!pwd) {
+			DEBUG(0,("sAMAccountName '%s' for sid %s does not exist as a local user\n", s, sidstr));
+			talloc_free(ctx);
+			return NT_STATUS_ACCESS_DENIED;
+		}
+		*uid = pwd->pw_uid;
+		talloc_free(ctx);
+		return NT_STATUS_OK;
+	}
+
+	DEBUG(0,("sid_to_unixuid: no unixID, unixName or sAMAccountName for sid %s\n", sidstr));
+
+	talloc_free(ctx);
+	return NT_STATUS_ACCESS_DENIED;
+}
+
+
+/*
+  map a sid to a unix gid
+*/
+NTSTATUS sidmap_sid_to_unixgid(struct sidmap_context *sidmap,
+			       struct dom_sid *sid, gid_t *gid)
+{
+	const char *attrs[] = { "sAMAccountName", "unixID", 
+				"unixName", "sAMAccountType", NULL };
+	int ret;
+	const char *s;
+	void *ctx;
+	struct ldb_message **res;
+	const char *sidstr;
+	uint_t atype;
+
+	ctx = talloc(sidmap, 0);
+	sidstr = dom_sid_string(ctx, sid);
+	if (sidstr == NULL) {
+		talloc_free(ctx);
+		return NT_STATUS_NO_MEMORY;
+	}
+
+	ret = samdb_search(sidmap->samctx, ctx, NULL, &res, attrs, 
+			   "objectSid=%s", sidstr);
+	if (ret != 1) {
+		DEBUG(0,("sid_to_unixgid: unable to find sam record for sid %s\n", sidstr));
+		talloc_free(ctx);
+		return NT_STATUS_ACCESS_DENIED;
+	}
+
+	/* make sure its not a user */
+	atype = samdb_result_uint(res[0], "sAMAccountType", 0);
+	if (atype && atype == ATYPE_NORMAL_ACCOUNT) {
+		DEBUG(0,("sid_to_unixgid: sid %s is a ATYPE_NORMAL_ACCOUNT\n", sidstr));
+		talloc_free(ctx);
+		return NT_STATUS_ACCESS_DENIED;
+	}
+
+	/* first try to get the gid directly */
+	s = samdb_result_string(res[0], "unixID", NULL);
+	if (s != NULL) {
+		*gid = strtoul(s, NULL, 0);
+		talloc_free(ctx);
+		return NT_STATUS_OK;
+	}
+
+	/* next try via the UnixName attribute */
+	s = samdb_result_string(res[0], "unixName", NULL);
+	if (s != NULL) {
+		struct group *grp = getgrnam(s);
+		if (!grp) {
+			DEBUG(0,("unixName '%s' for sid %s does not exist as a local group\n", 
+				 s, sidstr));
+			talloc_free(ctx);
+			return NT_STATUS_ACCESS_DENIED;
+		}
+		*gid = grp->gr_gid;
+		talloc_free(ctx);
+		return NT_STATUS_OK;
+	}
+
+	/* finally try via the sAMAccountName attribute */
+	s = samdb_result_string(res[0], "sAMAccountName", NULL);
+	if (s != NULL) {
+		struct group *grp = getgrnam(s);
+		if (!grp) {
+			DEBUG(0,("sAMAccountName '%s' for sid %s does not exist as a local group\n", s, sidstr));
+			talloc_free(ctx);
+			return NT_STATUS_ACCESS_DENIED;
+		}
+		*gid = grp->gr_gid;
+		talloc_free(ctx);
+		return NT_STATUS_OK;
+	}
+
+	DEBUG(0,("sid_to_unixgid: no unixID, unixName or sAMAccountName for sid %s\n", 
+		 sidstr));
+
+	talloc_free(ctx);
+	return NT_STATUS_ACCESS_DENIED;
+}
diff --git a/source4/ntvfs/config.mk b/source4/ntvfs/config.mk
index 43157a8c66..55f8270de2 100644
--- a/source4/ntvfs/config.mk
+++ b/source4/ntvfs/config.mk
@@ -59,6 +59,17 @@ INIT_OBJ_FILES = \
 ################################################
 
 ################################################
+# Start SUBSYSTEM ntvfs_common
+[SUBSYSTEM::ntvfs_common]
+ADD_OBJ_FILES = \
+		ntvfs/common/brlock.o \
+		ntvfs/common/opendb.o \
+		ntvfs/common/sidmap.o
+# End SUBSYSTEM ntvfs_common
+################################################
+
+
+################################################
 # Start SUBSYSTEM NTVFS
 [SUBSYSTEM::NTVFS]
 INIT_OBJ_FILES = \
diff --git a/source4/ntvfs/posix/config.mk b/source4/ntvfs/posix/config.mk
index 44857feda3..44a1625c5f 100644
--- a/source4/ntvfs/posix/config.mk
+++ b/source4/ntvfs/posix/config.mk
@@ -28,9 +28,7 @@ ADD_OBJ_FILES = \
 		ntvfs/posix/pvfs_ioctl.o \
 		ntvfs/posix/pvfs_xattr.o \
 		ntvfs/posix/pvfs_streams.o \
-		ntvfs/posix/pvfs_acl.o \
-		ntvfs/common/opendb.o \
-		ntvfs/common/brlock.o
-REQUIRED_SUBSYSTEMS = NDR_XATTR
+		ntvfs/posix/pvfs_acl.o
+REQUIRED_SUBSYSTEMS = NDR_XATTR ntvfs_common
 # End MODULE ntvfs_posix
 ################################################
diff --git a/source4/ntvfs/unixuid/config.mk b/source4/ntvfs/unixuid/config.mk
index 3df3194688..34c8f0c2b4 100644
--- a/source4/ntvfs/unixuid/config.mk
+++ b/source4/ntvfs/unixuid/config.mk
@@ -5,5 +5,7 @@ INIT_FUNCTION = ntvfs_unixuid_init
 SUBSYSTEM = NTVFS
 INIT_OBJ_FILES = \
 		ntvfs/unixuid/vfs_unixuid.o
+REQUIRED_SUBSYSTEMS = \
+		ntvfs_common
 # End MODULE ntvfs_unixuid
 ################################################
diff --git a/source4/ntvfs/unixuid/vfs_unixuid.c b/source4/ntvfs/unixuid/vfs_unixuid.c
index 674ce3e5cf..0535475dd3 100644
--- a/source4/ntvfs/unixuid/vfs_unixuid.c
+++ b/source4/ntvfs/unixuid/vfs_unixuid.c
@@ -26,162 +26,12 @@
 #include "smb_server/smb_server.h"
 
 struct unixuid_private {
-	void *samctx;
+	struct sidmap_context *sidmap;
 	struct unix_sec_ctx *last_sec_ctx;
 	struct nt_user_token *last_token;
 };
 
 
-/*
-  map a sid to a unix uid
-*/
-static NTSTATUS sid_to_unixuid(struct ntvfs_module_context *ntvfs,
-			       struct smbsrv_request *req, struct dom_sid *sid, uid_t *uid)
-{
-	struct unixuid_private *private = ntvfs->private_data;
-	const char *attrs[] = { "sAMAccountName", "unixID", "unixName", "sAMAccountType", NULL };
-	int ret;
-	const char *s;
-	void *ctx;
-	struct ldb_message **res;
-	const char *sidstr;
-	uint_t atype;
-
-	ctx = talloc(req, 0);
-	sidstr = dom_sid_string(ctx, sid);
-
-	ret = samdb_search(private->samctx, ctx, NULL, &res, attrs, "objectSid=%s", sidstr);
-	if (ret != 1) {
-		DEBUG(0,("sid_to_unixuid: unable to find sam record for sid %s\n", sidstr));
-		talloc_free(ctx);
-		return NT_STATUS_ACCESS_DENIED;
-	}
-
-	/* make sure its a user, not a group */
-	atype = samdb_result_uint(res[0], "sAMAccountType", 0);
-	if (atype && (!(atype & ATYPE_ACCOUNT))) {
-		DEBUG(0,("sid_to_unixuid: sid %s is not an account!\n", sidstr));
-		talloc_free(ctx);
-		return NT_STATUS_ACCESS_DENIED;
-	}
-
-	/* first try to get the uid directly */
-	s = samdb_result_string(res[0], "unixID", NULL);
-	if (s != NULL) {
-		*uid = strtoul(s, NULL, 0);
-		talloc_free(ctx);
-		return NT_STATUS_OK;
-	}
-
-	/* next try via the UnixName attribute */
-	s = samdb_result_string(res[0], "unixName", NULL);
-	if (s != NULL) {
-		struct passwd *pwd = getpwnam(s);
-		if (!pwd) {
-			DEBUG(0,("unixName %s for sid %s does not exist as a local user\n", s, sidstr));
-			talloc_free(ctx);
-			return NT_STATUS_ACCESS_DENIED;
-		}
-		*uid = pwd->pw_uid;
-		talloc_free(ctx);
-		return NT_STATUS_OK;
-	}
-
-	/* finally try via the sAMAccountName attribute */
-	s = samdb_result_string(res[0], "sAMAccountName", NULL);
-	if (s != NULL) {
-		struct passwd *pwd = getpwnam(s);
-		if (!pwd) {
-			DEBUG(0,("sAMAccountName '%s' for sid %s does not exist as a local user\n", s, sidstr));
-			talloc_free(ctx);
-			return NT_STATUS_ACCESS_DENIED;
-		}
-		*uid = pwd->pw_uid;
-		talloc_free(ctx);
-		return NT_STATUS_OK;
-	}
-
-	DEBUG(0,("sid_to_unixuid: no unixID, unixName or sAMAccountName for sid %s\n", sidstr));
-
-	talloc_free(ctx);
-	return NT_STATUS_ACCESS_DENIED;
-}
-
-
-/*
-  map a sid to a unix gid
-*/
-static NTSTATUS sid_to_unixgid(struct ntvfs_module_context *ntvfs,
-			       struct smbsrv_request *req, struct dom_sid *sid, gid_t *gid)
-{
-	struct unixuid_private *private = ntvfs->private_data;
-	const char *attrs[] = { "sAMAccountName", "unixID", "unixName", "sAMAccountType", NULL };
-	int ret;
-	const char *s;
-	void *ctx;
-	struct ldb_message **res;
-	const char *sidstr;
-	uint_t atype;
-
-	ctx = talloc(req, 0);
-	sidstr = dom_sid_string(ctx, sid);
-
-	ret = samdb_search(private->samctx, ctx, NULL, &res, attrs, "objectSid=%s", sidstr);
-	if (ret != 1) {
-		DEBUG(0,("sid_to_unixgid: unable to find sam record for sid %s\n", sidstr));
-		talloc_free(ctx);
-		return NT_STATUS_ACCESS_DENIED;
-	}
-
-	/* make sure its not a user */
-	atype = samdb_result_uint(res[0], "sAMAccountType", 0);
-	if (atype && atype == ATYPE_NORMAL_ACCOUNT) {
-		DEBUG(0,("sid_to_unixgid: sid %s is a ATYPE_NORMAL_ACCOUNT\n", sidstr));
-		talloc_free(ctx);
-		return NT_STATUS_ACCESS_DENIED;
-	}
-
-	/* first try to get the gid directly */
-	s = samdb_result_string(res[0], "unixID", NULL);
-	if (s != NULL) {
-		*gid = strtoul(s, NULL, 0);
-		talloc_free(ctx);
-		return NT_STATUS_OK;
-	}
-
-	/* next try via the UnixName attribute */
-	s = samdb_result_string(res[0], "unixName", NULL);
-	if (s != NULL) {
-		struct group *grp = getgrnam(s);
-		if (!grp) {
-			DEBUG(0,("unixName '%s' for sid %s does not exist as a local group\n", s, sidstr));
-			talloc_free(ctx);
-			return NT_STATUS_ACCESS_DENIED;
-		}
-		*gid = grp->gr_gid;
-		talloc_free(ctx);
-		return NT_STATUS_OK;
-	}
-
-	/* finally try via the sAMAccountName attribute */
-	s = samdb_result_string(res[0], "sAMAccountName", NULL);
-	if (s != NULL) {
-		struct group *grp = getgrnam(s);
-		if (!grp) {
-			DEBUG(0,("sAMAccountName '%s' for sid %s does not exist as a local group\n", s, sidstr));
-			talloc_free(ctx);
-			return NT_STATUS_ACCESS_DENIED;
-		}
-		*gid = grp->gr_gid;
-		talloc_free(ctx);
-		return NT_STATUS_OK;
-	}
-
-	DEBUG(0,("sid_to_unixgid: no unixID, unixName or sAMAccountName for sid %s\n", sidstr));
-
-	talloc_free(ctx);
-	return NT_STATUS_ACCESS_DENIED;
-}
 
 struct unix_sec_ctx {
 	uid_t uid;
@@ -247,6 +97,7 @@ static NTSTATUS nt_token_to_unix_security(struct ntvfs_module_context *ntvfs,
 					  struct nt_user_token *token,
 					  struct unix_sec_ctx **sec)
 {
+	struct unixuid_private *private = ntvfs->private_data;
 	int i;
 	NTSTATUS status;
 	*sec = talloc_p(req, struct unix_sec_ctx);
@@ -256,12 +107,14 @@ static NTSTATUS nt_token_to_unix_security(struct ntvfs_module_context *ntvfs,
 		return NT_STATUS_ACCESS_DENIED;
 	}
 
-	status = sid_to_unixuid(ntvfs, req, token->user_sids[0], &(*sec)->uid);
+	status = sidmap_sid_to_unixuid(private->sidmap, 
+				       token->user_sids[0], &(*sec)->uid);
 	if (!NT_STATUS_IS_OK(status)) {
 		return status;
 	}
 
-	status = sid_to_unixgid(ntvfs, req, token->user_sids[1], &(*sec)->gid);
+	status = sidmap_sid_to_unixgid(private->sidmap, 
+				       token->user_sids[1], &(*sec)->gid);
 	if (!NT_STATUS_IS_OK(status)) {
 		return status;
 	}
@@ -273,7 +126,8 @@ static NTSTATUS nt_token_to_unix_security(struct ntvfs_module_context *ntvfs,
 	}
 
 	for (i=0;i<(*sec)->ngroups;i++) {
-		status = sid_to_unixgid(ntvfs, req, token->user_sids[i+2], &(*sec)->groups[i]);
+		status = sidmap_sid_to_unixgid(private->sidmap, 
+					       token->user_sids[i+2], &(*sec)->groups[i]);
 		if (!NT_STATUS_IS_OK(status)) {
 			return status;
 		}
@@ -358,8 +212,8 @@ static NTSTATUS unixuid_connect(struct ntvfs_module_context *ntvfs,
 		return NT_STATUS_NO_MEMORY;
 	}
 
-	private->samctx = samdb_connect(private);
-	if (private->samctx == NULL) {
+	private->sidmap = sidmap_open(private);
+	if (private->sidmap == NULL) {
 		return NT_STATUS_INTERNAL_DB_CORRUPTION;
 	}