r3810: create a LIB_SECURITY subsystem

- move dom_sid, security_descriptor, security_* funtions to one place
  and rename some of them

metze
(This used to be commit b620bdd672cfdf0e009492e648b0709e6b6d8596)

4 files changed, 418 insertions, 0 deletions

diff --git a/source4/libcli/security/config.mk b/source4/libcli/security/config.mk
new file mode 100644
index 0000000000..908a993ce6
--- /dev/null
+++ b/source4/libcli/security/config.mk
@@ -0,0 +1,18 @@
+#################################
+# Start SUBSYSTEM LIB_SECURITY_NDR
+[SUBSYSTEM::LIB_SECURITY_NDR]
+ADD_OBJ_FILES = librpc/gen_ndr/ndr_security.o
+NOPROTO = YES
+# End SUBSYSTEM LIB_SECURITY_NDR
+#################################
+
+#################################
+# Start SUBSYSTEM LIB_SECURITY
+[SUBSYSTEM::LIB_SECURITY]
+ADD_OBJ_FILES = libcli/security/security_token.o \
+		libcli/security/security_descriptor.o \
+		libcli/security/dom_sid.o \
+		librpc/ndr/ndr_sec.o
+REQUIRED_SUBSYSTEMS = LIB_SECURITY_NDR
+# End SUBSYSTEM LIB_SECURITY
+#################################
diff --git a/source4/libcli/security/dom_sid.c b/source4/libcli/security/dom_sid.c
new file mode 100644
index 0000000000..701fa88017
--- /dev/null
+++ b/source4/libcli/security/dom_sid.c
@@ -0,0 +1,242 @@
+/* 
+   Unix SMB/CIFS implementation.
+   Samba utility functions
+   Copyright (C) Andrew Tridgell 		1992-2004
+   Copyright (C) Luke Kenneth Caseson Leighton 	1998-1999
+   Copyright (C) Jeremy Allison  		1999
+   Copyright (C) Stefan (metze) Metzmacher 	2002-2004
+   Copyright (C) Simo Sorce 			2002
+      
+   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"
+#include "librpc/gen_ndr/ndr_security.h"
+
+/*****************************************************************
+ Compare the auth portion of two sids.
+*****************************************************************/  
+
+static int dom_sid_compare_auth(const struct dom_sid *sid1, const struct dom_sid *sid2)
+{
+	int i;
+
+	if (sid1 == sid2)
+		return 0;
+	if (!sid1)
+		return -1;
+	if (!sid2)
+		return 1;
+
+	if (sid1->sid_rev_num != sid2->sid_rev_num)
+		return sid1->sid_rev_num - sid2->sid_rev_num;
+
+	for (i = 0; i < 6; i++)
+		if (sid1->id_auth[i] != sid2->id_auth[i])
+			return sid1->id_auth[i] - sid2->id_auth[i];
+
+	return 0;
+}
+
+/*****************************************************************
+ Compare two sids.
+*****************************************************************/  
+
+static int dom_sid_compare(const struct dom_sid *sid1, const struct dom_sid *sid2)
+{
+	int i;
+
+	if (sid1 == sid2)
+		return 0;
+	if (!sid1)
+		return -1;
+	if (!sid2)
+		return 1;
+
+	/* Compare most likely different rids, first: i.e start at end */
+	if (sid1->num_auths != sid2->num_auths)
+		return sid1->num_auths - sid2->num_auths;
+
+	for (i = sid1->num_auths-1; i >= 0; --i)
+		if (sid1->sub_auths[i] != sid2->sub_auths[i])
+			return sid1->sub_auths[i] - sid2->sub_auths[i];
+
+	return dom_sid_compare_auth(sid1, sid2);
+}
+
+/*****************************************************************
+ Compare two sids.
+*****************************************************************/  
+
+BOOL dom_sid_equal(const struct dom_sid *sid1, const struct dom_sid *sid2)
+{
+	return dom_sid_compare(sid1, sid2) == 0;
+}
+
+/*
+  convert a dom_sid to a string
+*/
+char *dom_sid_string(TALLOC_CTX *mem_ctx, const struct dom_sid *sid)
+{
+	int i, ofs, maxlen;
+	uint32_t ia;
+	char *ret;
+	
+	if (!sid) {
+		return talloc_strdup(mem_ctx, "(NULL SID)");
+	}
+
+	maxlen = sid->num_auths * 11 + 25;
+	ret = talloc(mem_ctx, maxlen);
+	if (!ret) return talloc_strdup(mem_ctx, "(SID ERR)");
+
+	ia = (sid->id_auth[5]) +
+		(sid->id_auth[4] << 8 ) +
+		(sid->id_auth[3] << 16) +
+		(sid->id_auth[2] << 24);
+
+	ofs = snprintf(ret, maxlen, "S-%u-%lu", 
+		       (uint_t)sid->sid_rev_num, (unsigned long)ia);
+
+	for (i = 0; i < sid->num_auths; i++) {
+		ofs += snprintf(ret + ofs, maxlen - ofs, "-%lu", (unsigned long)sid->sub_auths[i]);
+	}
+	
+	return ret;
+}
+
+
+/*
+  convert a string to a dom_sid, returning a talloc'd dom_sid
+*/
+struct dom_sid *dom_sid_parse_talloc(TALLOC_CTX *mem_ctx, const char *sidstr)
+{
+	struct dom_sid *ret;
+	uint_t rev, ia, num_sub_auths, i;
+	char *p;
+  
+	if (strncasecmp(sidstr, "S-", 2)) {
+		return NULL;
+	}
+
+	sidstr += 2;
+
+	rev = strtol(sidstr, &p, 10);
+	if (*p != '-') {
+		return NULL;
+	}
+	sidstr = p+1;
+
+	ia = strtol(sidstr, &p, 10);
+	if (p == sidstr) {
+		return NULL;
+	}
+	sidstr = p;
+
+	num_sub_auths = 0;
+	for (i=0;sidstr[i];i++) {
+		if (sidstr[i] == '-') num_sub_auths++;
+	}
+
+	ret = talloc_p(mem_ctx, struct dom_sid);
+	if (!ret) {
+		return NULL;
+	}
+
+	ret->sub_auths = talloc_array_p(mem_ctx, uint32_t, num_sub_auths);
+	if (!ret->sub_auths) {
+		return NULL;
+	}
+
+	ret->sid_rev_num = rev;
+	ret->id_auth[0] = 0;
+	ret->id_auth[1] = 0;
+	ret->id_auth[2] = ia >> 24;
+	ret->id_auth[3] = ia >> 16;
+	ret->id_auth[4] = ia >> 8;
+	ret->id_auth[5] = ia;
+	ret->num_auths = num_sub_auths;
+
+	for (i=0;i<num_sub_auths;i++) {
+		if (sidstr[0] != '-') {
+			return NULL;
+		}
+		sidstr++;
+		ret->sub_auths[i] = strtoul(sidstr, &p, 10);
+		if (p == sidstr) {
+			return NULL;
+		}
+		sidstr = p;
+	}
+
+	return ret;
+}
+
+/*
+  convert a string to a dom_sid, returning a talloc'd dom_sid
+*/
+struct dom_sid *dom_sid_dup(TALLOC_CTX *mem_ctx, const struct dom_sid *dom_sid)
+{
+	struct dom_sid *ret;
+	int i;
+	ret = talloc_p(mem_ctx, struct dom_sid);
+	if (!ret) {
+		return NULL;
+	}
+
+	ret->sub_auths = talloc_array_p(mem_ctx, uint32_t, dom_sid->num_auths);
+	if (!ret->sub_auths) {
+		return NULL;
+	}
+
+	ret->sid_rev_num = dom_sid->sid_rev_num;
+	ret->id_auth[0] = dom_sid->id_auth[0];
+	ret->id_auth[1] = dom_sid->id_auth[1];
+	ret->id_auth[2] = dom_sid->id_auth[2];
+	ret->id_auth[3] = dom_sid->id_auth[3];
+	ret->id_auth[4] = dom_sid->id_auth[4];
+	ret->id_auth[5] = dom_sid->id_auth[5];
+	ret->num_auths = dom_sid->num_auths;
+
+	for (i=0;i<dom_sid->num_auths;i++) {
+		ret->sub_auths[i] = dom_sid->sub_auths[i];
+	}
+
+	return ret;
+}
+
+/*
+  add a rid to a domain dom_sid to make a full dom_sid
+*/
+struct dom_sid *dom_sid_add_rid(TALLOC_CTX *mem_ctx, 
+				const struct dom_sid *domain_sid, 
+				uint32_t rid)
+{
+	struct dom_sid *sid;
+
+	sid = talloc_p(mem_ctx, struct dom_sid);
+	if (!sid) return NULL;
+
+	*sid = *domain_sid;
+	/*TODO: use realloc! */
+	sid->sub_auths = talloc_array_p(mem_ctx, uint32_t, sid->num_auths+1);
+	if (!sid->sub_auths) {
+		return NULL;
+	}
+	memcpy(sid->sub_auths, domain_sid->sub_auths, sid->num_auths*sizeof(uint32_t));
+	sid->sub_auths[sid->num_auths] = rid;
+	sid->num_auths++;
+	return sid;
+}
diff --git a/source4/libcli/security/security_descriptor.c b/source4/libcli/security/security_descriptor.c
new file mode 100644
index 0000000000..255836066a
--- /dev/null
+++ b/source4/libcli/security/security_descriptor.c
@@ -0,0 +1,102 @@
+/* 
+   Unix SMB/CIFS implementation.
+
+   security descriptror utility functions
+
+   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"
+#include "librpc/gen_ndr/ndr_security.h"
+
+/*
+  return a blank security descriptor (no owners, dacl or sacl)
+*/
+struct security_descriptor *security_descriptor_initialise(TALLOC_CTX *mem_ctx)
+{
+	struct security_descriptor *sd;
+
+	sd = talloc_p(mem_ctx, struct security_descriptor);
+	if (!sd) {
+		return NULL;
+	}
+
+	sd->revision = SD_REVISION;
+	/* we mark as self relative, even though it isn't while it remains
+	   a pointer in memory because this simplifies the ndr code later.
+	   All SDs that we store/emit are in fact SELF_RELATIVE
+	*/
+	sd->type = SEC_DESC_SELF_RELATIVE;
+
+	sd->owner_sid = NULL;
+	sd->group_sid = NULL;
+	sd->sacl = NULL;
+	sd->dacl = NULL;
+
+	return sd;
+}
+
+/* 
+   talloc and copy a security descriptor
+ */
+struct security_descriptor *security_descriptor_copy(TALLOC_CTX *mem_ctx, 
+							const struct security_descriptor *osd)
+{
+	struct security_descriptor *nsd;
+
+	/* FIXME */
+	DEBUG(1, ("security_descriptor_copy(): sorry unimplemented yet\n"));
+	nsd = NULL;
+
+	return nsd;
+}
+
+NTSTATUS security_check_dacl(struct security_token *st, struct security_descriptor *sd, uint32 access_mask)
+{
+	size_t i,y;
+	NTSTATUS status = NT_STATUS_ACCESS_DENIED;
+
+	DEBUG(1, ("security_check_dacl(): sorry untested yet\n"));
+	return status;
+
+	if (!sd->dacl) {
+		return NT_STATUS_INVALID_ACL;
+	}
+
+	for (i=0; i < st->num_sids; i++) {
+		for (y=0; y < sd->dacl->num_aces; y++) {
+			if (dom_sid_equal(&st->sids[i], &sd->dacl->aces[y].trustee)) {
+				switch (sd->dacl->aces[y].type) {
+					case SEC_ACE_TYPE_ACCESS_ALLOWED:
+						if (access_mask & sd->dacl->aces[y].access_mask) {
+							status = NT_STATUS_OK;
+						}
+						break;
+					case SEC_ACE_TYPE_ACCESS_DENIED:
+						if (access_mask & sd->dacl->aces[y].access_mask) {
+							return NT_STATUS_ACCESS_DENIED;
+						}
+						break;
+					default:
+						return NT_STATUS_INVALID_ACL;
+				}
+			}
+		}
+	}
+
+	return status;
+}
diff --git a/source4/libcli/security/security_token.c b/source4/libcli/security/security_token.c
new file mode 100644
index 0000000000..9e26f5a385
--- /dev/null
+++ b/source4/libcli/security/security_token.c
@@ -0,0 +1,56 @@
+/* 
+   Unix SMB/CIFS implementation.
+
+   security descriptror utility functions
+
+   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"
+#include "librpc/gen_ndr/ndr_security.h"
+
+/*
+  return a blank security descriptor (no owners, dacl or sacl)
+*/
+struct security_token *security_token_initialise(TALLOC_CTX *mem_ctx)
+{
+	struct security_token *st;
+
+	st = talloc_p(mem_ctx, struct security_token);
+	if (!st) {
+		return NULL;
+	}
+
+	st->flags = 0;
+
+	st->user_sid = NULL;
+	st->group_sid = NULL;
+	st->logon_sid = NULL;
+
+	st->num_sids = 0;
+	st->sids = NULL;
+
+	st->num_restricted_sids = 0;
+	st->restricted_sids = NULL;
+
+	st->num_privileges = 0;
+	st->privileges = NULL;
+
+	st->dacl = NULL;
+
+	return st;
+}