X-Git-Url: http://git.samba.org/?a=blobdiff_plain;f=libcli%2Fsecurity%2Futil_sid.c;h=4a186d69cdaeccaf0aaefa7ba0d886eb4a55eecd;hb=e18610a197aab80a32cae8c1e09b96496679bbad;hp=a86d4cbddb0d6cd8c3e680082ccd487322e5f1b8;hpb=e5a6d4cdb693ea72389b8dd523c642716c87a6e3;p=samba.git

diff --git a/libcli/security/util_sid.c b/libcli/security/util_sid.c
index a86d4cbddb0..4a186d69cda 100644
--- a/libcli/security/util_sid.c
+++ b/libcli/security/util_sid.c
@@ -34,64 +34,127 @@
  */
 
 
+/* S-1-1 */
 const struct dom_sid global_sid_World_Domain =               /* Everyone domain */
 { 1, 0, {0,0,0,0,0,1}, {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0}};
+/* S-1-1-0 */
 const struct dom_sid global_sid_World =                      /* Everyone */
 { 1, 1, {0,0,0,0,0,1}, {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0}};
+/* S-1-2 */
+const struct dom_sid global_sid_Local_Authority =            /* Local Authority */
+{ 1, 0, {0,0,0,0,0,2}, {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0}};
+/* S-1-3 */
 const struct dom_sid global_sid_Creator_Owner_Domain =       /* Creator Owner domain */
 { 1, 0, {0,0,0,0,0,3}, {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0}};
+/* S-1-5 */
 const struct dom_sid global_sid_NT_Authority =    		/* NT Authority */
 { 1, 0, {0,0,0,0,0,5}, {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0}};
+/* S-1-5-18 */
 const struct dom_sid global_sid_System =			/* System */
 { 1, 1, {0,0,0,0,0,5}, {18,0,0,0,0,0,0,0,0,0,0,0,0,0,0}};
+/* S-1-0-0 */
 const struct dom_sid global_sid_NULL =            		/* NULL sid */
 { 1, 1, {0,0,0,0,0,0}, {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0}};
+/* S-1-5-11 */
 const struct dom_sid global_sid_Authenticated_Users =	/* All authenticated rids */
 { 1, 1, {0,0,0,0,0,5}, {11,0,0,0,0,0,0,0,0,0,0,0,0,0,0}};
 #if 0
-/* for documentation */
+/* for documentation S-1-5-12 */
 const struct dom_sid global_sid_Restriced =			/* Restriced Code */
 { 1, 1, {0,0,0,0,0,5}, {12,0,0,0,0,0,0,0,0,0,0,0,0,0,0}};
 #endif
+
+/* S-1-18 */
+const struct dom_sid global_sid_Asserted_Identity =       /* Asserted Identity */
+{ 1, 0, {0,0,0,0,0,18}, {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0}};
+/* S-1-18-1 */
+const struct dom_sid global_sid_Asserted_Identity_Service =	/* Asserted Identity Service */
+{ 1, 1, {0,0,0,0,0,18}, {1,0,0,0,0,0,0,0,0,0,0,0,0,0,0}};
+/* S-1-18-2 */
+const struct dom_sid global_sid_Asserted_Identity_Authentication_Authority =	/* Asserted Identity Authentication Authority */
+{ 1, 1, {0,0,0,0,0,18}, {2,0,0,0,0,0,0,0,0,0,0,0,0,0,0}};
+
+/* S-1-5-2 */
 const struct dom_sid global_sid_Network =			/* Network rids */
 { 1, 1, {0,0,0,0,0,5}, {2,0,0,0,0,0,0,0,0,0,0,0,0,0,0}};
 
+/* S-1-3 */
 const struct dom_sid global_sid_Creator_Owner =		/* Creator Owner */
 { 1, 1, {0,0,0,0,0,3}, {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0}};
+/* S-1-3-1 */
 const struct dom_sid global_sid_Creator_Group =		/* Creator Group */
 { 1, 1, {0,0,0,0,0,3}, {1,0,0,0,0,0,0,0,0,0,0,0,0,0,0}};
+/* S-1-3-4 */
+const struct dom_sid global_sid_Owner_Rights =		/* Owner Rights */
+{ 1, 1, {0,0,0,0,0,3}, {4,0,0,0,0,0,0,0,0,0,0,0,0,0,0}};
+/* S-1-5-7 */
 const struct dom_sid global_sid_Anonymous =			/* Anonymous login */
 { 1, 1, {0,0,0,0,0,5}, {7,0,0,0,0,0,0,0,0,0,0,0,0,0,0}};
+/* S-1-5-9 */
 const struct dom_sid global_sid_Enterprise_DCs =		/* Enterprise DCs */
 { 1, 1, {0,0,0,0,0,5}, {9,0,0,0,0,0,0,0,0,0,0,0,0,0,0}};
+/* S-1-5-32 */
 const struct dom_sid global_sid_Builtin = 			/* Local well-known domain */
 { 1, 1, {0,0,0,0,0,5}, {32,0,0,0,0,0,0,0,0,0,0,0,0,0,0}};
+/* S-1-5-32-544 */
 const struct dom_sid global_sid_Builtin_Administrators =	/* Builtin administrators */
 { 1, 2, {0,0,0,0,0,5}, {32,544,0,0,0,0,0,0,0,0,0,0,0,0,0}};
+/* S-1-5-32-545 */
 const struct dom_sid global_sid_Builtin_Users =		/* Builtin users */
 { 1, 2, {0,0,0,0,0,5}, {32,545,0,0,0,0,0,0,0,0,0,0,0,0,0}};
+/* S-1-5-32-546 */
 const struct dom_sid global_sid_Builtin_Guests =		/* Builtin guest users */
 { 1, 2, {0,0,0,0,0,5}, {32,546,0,0,0,0,0,0,0,0,0,0,0,0,0}};
+/* S-1-5-32-547 */
 const struct dom_sid global_sid_Builtin_Power_Users =	/* Builtin power users */
 { 1, 2, {0,0,0,0,0,5}, {32,547,0,0,0,0,0,0,0,0,0,0,0,0,0}};
+/* S-1-5-32-548 */
 const struct dom_sid global_sid_Builtin_Account_Operators =	/* Builtin account operators */
 { 1, 2, {0,0,0,0,0,5}, {32,548,0,0,0,0,0,0,0,0,0,0,0,0,0}};
+/* S-1-5-32-549 */
 const struct dom_sid global_sid_Builtin_Server_Operators =	/* Builtin server operators */
 { 1, 2, {0,0,0,0,0,5}, {32,549,0,0,0,0,0,0,0,0,0,0,0,0,0}};
+/* S-1-5-32-550 */
 const struct dom_sid global_sid_Builtin_Print_Operators =	/* Builtin print operators */
 { 1, 2, {0,0,0,0,0,5}, {32,550,0,0,0,0,0,0,0,0,0,0,0,0,0}};
+/* S-1-5-32-551 */
 const struct dom_sid global_sid_Builtin_Backup_Operators =	/* Builtin backup operators */
 { 1, 2, {0,0,0,0,0,5}, {32,551,0,0,0,0,0,0,0,0,0,0,0,0,0}};
+/* S-1-5-32-552 */
 const struct dom_sid global_sid_Builtin_Replicator =		/* Builtin replicator */
 { 1, 2, {0,0,0,0,0,5}, {32,552,0,0,0,0,0,0,0,0,0,0,0,0,0}};
+/* S-1-5-32-554 */
 const struct dom_sid global_sid_Builtin_PreWin2kAccess =	/* Builtin pre win2k access */
 { 1, 2, {0,0,0,0,0,5}, {32,554,0,0,0,0,0,0,0,0,0,0,0,0,0}};
 
+/* S-1-22-1 */
 const struct dom_sid global_sid_Unix_Users =			/* Unmapped Unix users */
 { 1, 1, {0,0,0,0,0,22}, {1,0,0,0,0,0,0,0,0,0,0,0,0,0,0}};
+/* S-1-22-2 */
 const struct dom_sid global_sid_Unix_Groups =			/* Unmapped Unix groups */
 { 1, 1, {0,0,0,0,0,22}, {2,0,0,0,0,0,0,0,0,0,0,0,0,0,0}};
 
+/*
+ * http://technet.microsoft.com/en-us/library/hh509017(v=ws.10).aspx
+ */
+/* S-1-5-88 */
+const struct dom_sid global_sid_Unix_NFS =             /* MS NFS and Apple style */
+{ 1, 1, {0,0,0,0,0,5}, {88,0,0,0,0,0,0,0,0,0,0,0,0,0,0}};
+/* S-1-5-88-1 */
+const struct dom_sid global_sid_Unix_NFS_Users =		/* Unix uid, MS NFS and Apple style */
+{ 1, 2, {0,0,0,0,0,5}, {88,1,0,0,0,0,0,0,0,0,0,0,0,0,0}};
+/* S-1-5-88-2 */
+const struct dom_sid global_sid_Unix_NFS_Groups =		/* Unix gid, MS NFS and Apple style */
+{ 1, 2, {0,0,0,0,0,5}, {88,2,0,0,0,0,0,0,0,0,0,0,0,0,0}};
+/* S-1-5-88-3 */
+const struct dom_sid global_sid_Unix_NFS_Mode =			/* Unix mode */
+{ 1, 2, {0,0,0,0,0,5}, {88,3,0,0,0,0,0,0,0,0,0,0,0,0,0}};
+/* Unused, left here for documentary purposes */
+#if 0
+const struct dom_sid global_sid_Unix_NFS_Other =		/* Unix other, MS NFS and Apple style */
+{ 1, 2, {0,0,0,0,0,5}, {88,4,0,0,0,0,0,0,0,0,0,0,0,0,0}};
+#endif
+
 /* Unused, left here for documentary purposes */
 #if 0
 #define SECURITY_NULL_SID_AUTHORITY    0
@@ -126,12 +189,13 @@ static const struct {
 	{SID_NAME_DELETED, "Deleted Account"},
 	{SID_NAME_INVALID, "Invalid Account"},
 	{SID_NAME_UNKNOWN, "UNKNOWN"},
-	{SID_NAME_COMPUTER, "Computer"}
+	{SID_NAME_COMPUTER, "Computer"},
+	{SID_NAME_LABEL, "Mandatory Label"}
 };
 
 const char *sid_type_lookup(uint32_t sid_type)
 {
-	int i;
+	size_t i;
 
 	/* Look through list */
 	for (i=0; i < ARRAY_SIZE(sid_name_type); i++) {
@@ -221,10 +285,10 @@ void sid_copy(struct dom_sid *dst, const struct dom_sid *src)
 {
 	int i;
 
-	ZERO_STRUCTP(dst);
-
-	dst->sid_rev_num = src->sid_rev_num;
-	dst->num_auths = src->num_auths;
+	*dst = (struct dom_sid) {
+		.sid_rev_num = src->sid_rev_num,
+		.num_auths = src->num_auths,
+	};
 
 	memcpy(&dst->id_auth[0], &src->id_auth[0], sizeof(src->id_auth));
 
@@ -233,28 +297,21 @@ void sid_copy(struct dom_sid *dst, const struct dom_sid *src)
 }
 
 /*****************************************************************
- Parse a on-the-wire SID (in a DATA_BLOB) to a struct dom_sid.
+ Parse a on-the-wire SID to a struct dom_sid.
 *****************************************************************/
 
-bool sid_blob_parse(DATA_BLOB in, struct dom_sid *sid)
+struct sid_parse_ret sid_parse(
+	const uint8_t *inbuf, size_t len, struct dom_sid *sid)
 {
+	DATA_BLOB in = data_blob_const(inbuf, len);
 	enum ndr_err_code ndr_err;
-	ndr_err = ndr_pull_struct_blob_all(&in, NULL, sid,
-					   (ndr_pull_flags_fn_t)ndr_pull_dom_sid);
+
+	ndr_err = ndr_pull_struct_blob_all(
+		&in, NULL, sid, (ndr_pull_flags_fn_t)ndr_pull_dom_sid);
 	if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
-		return false;
+		return (struct sid_parse_ret) { .len = -1 };
 	}
-	return true;
-}
-
-/*****************************************************************
- Parse a on-the-wire SID to a struct dom_sid.
-*****************************************************************/
-
-bool sid_parse(const char *inbuf, size_t len, struct dom_sid *sid)
-{
-	DATA_BLOB in = data_blob_const(inbuf, len);
-	return sid_blob_parse(in, sid);
+	return (struct sid_parse_ret) { .len = ndr_size_dom_sid(sid, 0) };
 }
 
 /*****************************************************************
@@ -282,12 +339,18 @@ int sid_compare_domain(const struct dom_sid *sid1, const struct dom_sid *sid2)
 NTSTATUS add_sid_to_array(TALLOC_CTX *mem_ctx, const struct dom_sid *sid,
 			  struct dom_sid **sids, uint32_t *num)
 {
-	*sids = talloc_realloc(mem_ctx, *sids, struct dom_sid,
-			       (*num)+1);
-	if (*sids == NULL) {
+	struct dom_sid *tmp;
+
+	if ((*num) == UINT32_MAX) {
+		return NT_STATUS_INTEGER_OVERFLOW;
+	}
+
+	tmp = talloc_realloc(mem_ctx, *sids, struct dom_sid, (*num)+1);
+	if (tmp == NULL) {
 		*num = 0;
 		return NT_STATUS_NO_MEMORY;
 	}
+	*sids = tmp;
 
 	sid_copy(&((*sids)[*num]), sid);
 	*num += 1;
@@ -306,8 +369,9 @@ NTSTATUS add_sid_to_array_unique(TALLOC_CTX *mem_ctx, const struct dom_sid *sid,
 	uint32_t i;
 
 	for (i=0; i<(*num_sids); i++) {
-		if (dom_sid_compare(sid, &(*sids)[i]) == 0)
+		if (dom_sid_equal(sid, &(*sids)[i])) {
 			return NT_STATUS_OK;
+		}
 	}
 
 	return add_sid_to_array(mem_ctx, sid, sids, num_sids);
@@ -337,8 +401,9 @@ void del_sid_from_array(const struct dom_sid *sid, struct dom_sid **sids,
 	/* This loop will copy the remainder of the array
 	   if i < num of sids in the array */
 
-	for ( ; i<*num; i++ )
+	for ( ; i<*num; i++ ) {
 		sid_copy( &sid_list[i], &sid_list[i+1] );
+	}
 
 	return;
 }
@@ -367,6 +432,538 @@ bool add_rid_to_array_unique(TALLOC_CTX *mem_ctx,
 
 bool is_null_sid(const struct dom_sid *sid)
 {
-	static const struct dom_sid null_sid = {0};
+	const struct dom_sid null_sid = {0};
 	return dom_sid_equal(sid, &null_sid);
 }
+
+/*
+ * See [MS-LSAT] 3.1.1.1.1 Predefined Translation Database and Corresponding View
+ */
+struct predefined_name_mapping {
+	const char *name;
+	enum lsa_SidType type;
+	struct dom_sid sid;
+};
+
+struct predefined_domain_mapping {
+	const char *domain;
+	struct dom_sid sid;
+	size_t num_names;
+	const struct predefined_name_mapping *names;
+};
+
+/* S-1-${AUTHORITY} */
+#define _SID0(authority) \
+	{ 1, 0, {0,0,0,0,0,authority}, {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0}}
+/* S-1-${AUTHORITY}-${SUB1} */
+#define _SID1(authority,sub1) \
+	{ 1, 1, {0,0,0,0,0,authority}, {sub1,0,0,0,0,0,0,0,0,0,0,0,0,0,0}}
+/* S-1-${AUTHORITY}-${SUB1}-${SUB2} */
+#define _SID2(authority,sub1,sub2) \
+	{ 1, 2, {0,0,0,0,0,authority}, {sub1,sub2,0,0,0,0,0,0,0,0,0,0,0,0,0}}
+
+/*
+ * S-1-0
+ */
+static const struct predefined_name_mapping predefined_names_S_1_0[] = {
+	{
+		.name = "NULL SID",
+		.type = SID_NAME_WKN_GRP,
+		.sid = _SID1(0, 0), /* S-1-0-0 */
+	},
+};
+
+/*
+ * S-1-1
+ */
+static const struct predefined_name_mapping predefined_names_S_1_1[] = {
+	{
+		.name = "Everyone",
+		.type = SID_NAME_WKN_GRP,
+		.sid = _SID1(1, 0), /* S-1-1-0 */
+	},
+};
+
+/*
+ * S-1-2
+ */
+static const struct predefined_name_mapping predefined_names_S_1_2[] = {
+	{
+		.name = "LOCAL",
+		.type = SID_NAME_WKN_GRP,
+		.sid = _SID1(2, 0), /* S-1-2-0 */
+	},
+};
+
+/*
+ * S-1-3
+ */
+static const struct predefined_name_mapping predefined_names_S_1_3[] = {
+	{
+		.name = "CREATOR OWNER",
+		.type = SID_NAME_WKN_GRP,
+		.sid = _SID1(3, 0), /* S-1-3-0 */
+	},
+	{
+		.name = "CREATOR GROUP",
+		.type = SID_NAME_WKN_GRP,
+		.sid = _SID1(3, 1), /* S-1-3-1 */
+	},
+	{
+		.name = "CREATOR OWNER SERVER",
+		.type = SID_NAME_WKN_GRP,
+		.sid = _SID1(3, 0), /* S-1-3-2 */
+	},
+	{
+		.name = "CREATOR GROUP SERVER",
+		.type = SID_NAME_WKN_GRP,
+		.sid = _SID1(3, 1), /* S-1-3-3 */
+	},
+	{
+		.name = "OWNER RIGHTS",
+		.type = SID_NAME_WKN_GRP,
+		.sid = _SID1(3, 4), /* S-1-3-4 */
+	},
+};
+
+/*
+ * S-1-5 only 'NT Pseudo Domain'
+ */
+static const struct predefined_name_mapping predefined_names_S_1_5p[] = {
+	{
+		.name = "NT Pseudo Domain",
+		.type = SID_NAME_DOMAIN,
+		.sid = _SID0(5), /* S-1-5 */
+	},
+};
+
+/*
+ * S-1-5 'NT AUTHORITY'
+ */
+static const struct predefined_name_mapping predefined_names_S_1_5a[] = {
+	{
+		.name = "DIALUP",
+		.type = SID_NAME_WKN_GRP,
+		.sid = _SID1(5, 1), /* S-1-5-1 */
+	},
+	{
+		.name = "NETWORK",
+		.type = SID_NAME_WKN_GRP,
+		.sid = _SID1(5, 2), /* S-1-5-2 */
+	},
+	{
+		.name = "BATCH",
+		.type = SID_NAME_WKN_GRP,
+		.sid = _SID1(5, 3), /* S-1-5-3 */
+	},
+	{
+		.name = "INTERACTIVE",
+		.type = SID_NAME_WKN_GRP,
+		.sid = _SID1(5, 4), /* S-1-5-4 */
+	},
+	{
+		.name = "SERVICE",
+		.type = SID_NAME_WKN_GRP,
+		.sid = _SID1(5, 6), /* S-1-5-6 */
+	},
+	{
+		.name = "ANONYMOUS LOGON",
+		.type = SID_NAME_WKN_GRP,
+		.sid = _SID1(5, 7), /* S-1-5-7 */
+	},
+	{
+		.name = "PROXY",
+		.type = SID_NAME_WKN_GRP,
+		.sid = _SID1(5, 8), /* S-1-5-8 */
+	},
+	{
+		.name = "ENTERPRISE DOMAIN CONTROLLERS",
+		.type = SID_NAME_WKN_GRP,
+		.sid = _SID1(5, 9), /* S-1-5-9 */
+	},
+	{
+		.name = "SELF",
+		.type = SID_NAME_WKN_GRP,
+		.sid = _SID1(5, 10), /* S-1-5-10 */
+	},
+	{
+		.name = "Authenticated Users",
+		.type = SID_NAME_WKN_GRP,
+		.sid = _SID1(5, 11), /* S-1-5-11 */
+	},
+	{
+		.name = "RESTRICTED",
+		.type = SID_NAME_WKN_GRP,
+		.sid = _SID1(5, 12), /* S-1-5-12 */
+	},
+	{
+		.name = "TERMINAL SERVER USER",
+		.type = SID_NAME_WKN_GRP,
+		.sid = _SID1(5, 13), /* S-1-5-13 */
+	},
+	{
+		.name = "REMOTE INTERACTIVE LOGON",
+		.type = SID_NAME_WKN_GRP,
+		.sid = _SID1(5, 14), /* S-1-5-14 */
+	},
+	{
+		.name = "This Organization",
+		.type = SID_NAME_WKN_GRP,
+		.sid = _SID1(5, 15), /* S-1-5-15 */
+	},
+	{
+		.name = "IUSR",
+		.type = SID_NAME_WKN_GRP,
+		.sid = _SID1(5, 17), /* S-1-5-17 */
+	},
+	{
+		.name = "SYSTEM",
+		.type = SID_NAME_WKN_GRP,
+		.sid = _SID1(5, 18), /* S-1-5-18 */
+	},
+	{
+		.name = "LOCAL SERVICE",
+		.type = SID_NAME_WKN_GRP,
+		.sid = _SID1(5, 19), /* S-1-5-19 */
+	},
+	{
+		.name = "NETWORK SERVICE",
+		.type = SID_NAME_WKN_GRP,
+		.sid = _SID1(5, 20), /* S-1-5-20 */
+	},
+	{
+		.name = "WRITE RESTRICTED",
+		.type = SID_NAME_WKN_GRP,
+		.sid = _SID1(5, 33), /* S-1-5-33 */
+	},
+	{
+		.name = "Other Organization",
+		.type = SID_NAME_WKN_GRP,
+		.sid = _SID1(5, 1000), /* S-1-5-1000 */
+	},
+};
+
+/*
+ * S-1-5-32
+ */
+static const struct predefined_name_mapping predefined_names_S_1_5_32[] = {
+	{
+		.name = "BUILTIN",
+		.type = SID_NAME_DOMAIN,
+		.sid = _SID1(5, 32), /* S-1-5-32 */
+	},
+};
+
+/*
+ * S-1-5-64
+ */
+static const struct predefined_name_mapping predefined_names_S_1_5_64[] = {
+	{
+		.name = "NTLM Authentication",
+		.type = SID_NAME_WKN_GRP,
+		.sid = _SID2(5, 64, 10), /* S-1-5-64-10 */
+	},
+	{
+		.name = "SChannel Authentication",
+		.type = SID_NAME_WKN_GRP,
+		.sid = _SID2(5, 64, 14), /* S-1-5-64-14 */
+	},
+	{
+		.name = "Digest Authentication",
+		.type = SID_NAME_WKN_GRP,
+		.sid = _SID2(5, 64, 21), /* S-1-5-64-21 */
+	},
+};
+
+/*
+ * S-1-7
+ */
+static const struct predefined_name_mapping predefined_names_S_1_7[] = {
+	{
+		.name = "Internet$",
+		.type = SID_NAME_DOMAIN,
+		.sid = _SID0(7), /* S-1-7 */
+	},
+};
+
+/*
+ * S-1-16
+ */
+static const struct predefined_name_mapping predefined_names_S_1_16[] = {
+	{
+		.name = "Mandatory Label",
+		.type = SID_NAME_DOMAIN,
+		.sid = _SID0(16), /* S-1-16 */
+	},
+	{
+		.name = "Untrusted Mandatory Level",
+		.type = SID_NAME_LABEL,
+		.sid = _SID1(16, 0), /* S-1-16-0 */
+	},
+	{
+		.name = "Low Mandatory Level",
+		.type = SID_NAME_LABEL,
+		.sid = _SID1(16, 4096), /* S-1-16-4096 */
+	},
+	{
+		.name = "Medium Mandatory Level",
+		.type = SID_NAME_LABEL,
+		.sid = _SID1(16, 8192), /* S-1-16-8192 */
+	},
+	{
+		.name = "High Mandatory Level",
+		.type = SID_NAME_LABEL,
+		.sid = _SID1(16, 12288), /* S-1-16-12288 */
+	},
+	{
+		.name = "System Mandatory Level",
+		.type = SID_NAME_LABEL,
+		.sid = _SID1(16, 16384), /* S-1-16-16384 */
+	},
+	{
+		.name = "Protected Process Mandatory Level",
+		.type = SID_NAME_LABEL,
+		.sid = _SID1(16, 20480), /* S-1-16-20480 */
+	},
+};
+
+static const struct predefined_domain_mapping predefined_domains[] = {
+	{
+		.domain = "",
+		.sid = _SID0(0), /* S-1-0 */
+		.num_names = ARRAY_SIZE(predefined_names_S_1_0),
+		.names = predefined_names_S_1_0,
+	},
+	{
+		.domain = "",
+		.sid = _SID0(1), /* S-1-1 */
+		.num_names = ARRAY_SIZE(predefined_names_S_1_1),
+		.names = predefined_names_S_1_1,
+	},
+	{
+		.domain = "",
+		.sid = _SID0(2), /* S-1-2 */
+		.num_names = ARRAY_SIZE(predefined_names_S_1_2),
+		.names = predefined_names_S_1_2,
+	},
+	{
+		.domain = "",
+		.sid = _SID0(3), /* S-1-3 */
+		.num_names = ARRAY_SIZE(predefined_names_S_1_3),
+		.names = predefined_names_S_1_3,
+	},
+	{
+		.domain = "",
+		.sid = _SID0(3), /* S-1-3 */
+		.num_names = ARRAY_SIZE(predefined_names_S_1_3),
+		.names = predefined_names_S_1_3,
+	},
+	/*
+	 * S-1-5 is split here
+	 *
+	 * 'NT Pseudo Domain' has precedence before 'NT AUTHORITY'.
+	 *
+	 * In a LookupSids with multiple sids e.g. S-1-5 and S-1-5-7
+	 * the domain section (struct lsa_DomainInfo) gets
+	 * 'NT Pseudo Domain' with S-1-5. If asked in reversed order
+	 * S-1-5-7 and then S-1-5, you get struct lsa_DomainInfo
+	 * with 'NT AUTHORITY' and S-1-5.
+	 */
+	{
+		.domain = "NT Pseudo Domain",
+		.sid = _SID0(5), /* S-1-5 */
+		.num_names = ARRAY_SIZE(predefined_names_S_1_5p),
+		.names = predefined_names_S_1_5p,
+	},
+	{
+		.domain = "NT AUTHORITY",
+		.sid = _SID0(5), /* S-1-5 */
+		.num_names = ARRAY_SIZE(predefined_names_S_1_5a),
+		.names = predefined_names_S_1_5a,
+	},
+	{
+		.domain = "BUILTIN",
+		.sid = _SID1(5, 32), /* S-1-5-32 */
+		.num_names = ARRAY_SIZE(predefined_names_S_1_5_32),
+		.names = predefined_names_S_1_5_32,
+	},
+	/*
+	 * 'NT AUTHORITY' again with S-1-5-64 this time
+	 */
+	{
+		.domain = "NT AUTHORITY",
+		.sid = _SID1(5, 64), /* S-1-5-64 */
+		.num_names = ARRAY_SIZE(predefined_names_S_1_5_64),
+		.names = predefined_names_S_1_5_64,
+	},
+	{
+		.domain = "Internet$",
+		.sid = _SID0(7), /* S-1-7 */
+		.num_names = ARRAY_SIZE(predefined_names_S_1_7),
+		.names = predefined_names_S_1_7,
+	},
+	{
+		.domain = "Mandatory Label",
+		.sid = _SID0(16), /* S-1-16 */
+		.num_names = ARRAY_SIZE(predefined_names_S_1_16),
+		.names = predefined_names_S_1_16,
+	},
+};
+
+NTSTATUS dom_sid_lookup_predefined_name(const char *name,
+					const struct dom_sid **sid,
+					enum lsa_SidType *type,
+					const struct dom_sid **authority_sid,
+					const char **authority_name)
+{
+	size_t di;
+	const char *domain = "";
+	size_t domain_len = 0;
+	const char *p;
+	bool match;
+
+	*sid = NULL;
+	*type = SID_NAME_UNKNOWN;
+	*authority_sid = NULL;
+	*authority_name = NULL;
+
+	if (name == NULL) {
+		name = "";
+	}
+
+	p = strchr(name, '\\');
+	if (p != NULL) {
+		domain = name;
+		domain_len = PTR_DIFF(p, domain);
+		name = p + 1;
+	}
+
+	match = strequal(name, "");
+	if (match) {
+		/*
+		 * Strange, but that's what W2012R2 does.
+		 */
+		name = "BUILTIN";
+	}
+
+	for (di = 0; di < ARRAY_SIZE(predefined_domains); di++) {
+		const struct predefined_domain_mapping *d =
+			&predefined_domains[di];
+		size_t ni;
+
+		if (domain_len != 0) {
+			int cmp;
+
+			cmp = strncasecmp(d->domain, domain, domain_len);
+			if (cmp != 0) {
+				continue;
+			}
+		}
+
+		for (ni = 0; ni < d->num_names; ni++) {
+			const struct predefined_name_mapping *n =
+				&d->names[ni];
+
+			match = strequal(n->name, name);
+			if (!match) {
+				continue;
+			}
+
+			*sid = &n->sid;
+			*type = n->type;
+			*authority_sid = &d->sid;
+			*authority_name = d->domain;
+			return NT_STATUS_OK;
+		}
+	}
+
+	return NT_STATUS_NONE_MAPPED;
+}
+
+bool dom_sid_lookup_is_predefined_domain(const char *domain)
+{
+	size_t di;
+	bool match;
+
+	if (domain == NULL) {
+		domain = "";
+	}
+
+	match = strequal(domain, "");
+	if (match) {
+		/*
+		 * Strange, but that's what W2012R2 does.
+		 */
+		domain = "BUILTIN";
+	}
+
+	for (di = 0; di < ARRAY_SIZE(predefined_domains); di++) {
+		const struct predefined_domain_mapping *d =
+			&predefined_domains[di];
+		int cmp;
+
+		cmp = strcasecmp(d->domain, domain);
+		if (cmp != 0) {
+			continue;
+		}
+
+		return true;
+	}
+
+	return false;
+}
+
+NTSTATUS dom_sid_lookup_predefined_sid(const struct dom_sid *sid,
+				       const char **name,
+				       enum lsa_SidType *type,
+				       const struct dom_sid **authority_sid,
+				       const char **authority_name)
+{
+	size_t di;
+	bool match_domain = false;
+
+	*name = NULL;
+	*type = SID_NAME_UNKNOWN;
+	*authority_sid = NULL;
+	*authority_name = NULL;
+
+	if (sid == NULL) {
+		return NT_STATUS_INVALID_SID;
+	}
+
+	for (di = 0; di < ARRAY_SIZE(predefined_domains); di++) {
+		const struct predefined_domain_mapping *d =
+			&predefined_domains[di];
+		size_t ni;
+		int cmp;
+
+		cmp = dom_sid_compare_auth(&d->sid, sid);
+		if (cmp != 0) {
+			continue;
+		}
+
+		match_domain = true;
+
+		for (ni = 0; ni < d->num_names; ni++) {
+			const struct predefined_name_mapping *n =
+				&d->names[ni];
+
+			cmp = dom_sid_compare(&n->sid, sid);
+			if (cmp != 0) {
+				continue;
+			}
+
+			*name = n->name;
+			*type = n->type;
+			*authority_sid = &d->sid;
+			*authority_name = d->domain;
+			return NT_STATUS_OK;
+		}
+	}
+
+	if (!match_domain) {
+		return NT_STATUS_INVALID_SID;
+	}
+
+	return NT_STATUS_NONE_MAPPED;
+}