libcli/security Merge source3/ string_to_sid() to common code

The source3 code repsects the limit of a maximum of 15 subauths,
while the source4 code does not, creating a security issue as
we parse string-form SIDs from clients.

Andrew Bartlett

1 files changed, 0 insertions, 106 deletions

diff --git a/source3/lib/util_sid.c b/source3/lib/util_sid.c
index 1f65f77991..b0b8d0ef72 100644
--- a/source3/lib/util_sid.c
+++ b/source3/lib/util_sid.c
@@ -194,112 +194,6 @@ char *sid_string_tos(const struct dom_sid *sid)
 	return sid_string_talloc(talloc_tos(), sid);
 }
 
-/*****************************************************************
- Convert a string to a SID. Returns True on success, False on fail.
-*****************************************************************/  
-
-bool string_to_sid(struct dom_sid *sidout, const char *sidstr)
-{
-	const char *p;
-	char *q;
-	/* BIG NOTE: this function only does SIDS where the identauth is not >= 2^32 */
-	uint32_t conv;
-
-	if ((sidstr[0] != 'S' && sidstr[0] != 's') || sidstr[1] != '-') {
-		goto format_error;
-	}
-
-	ZERO_STRUCTP(sidout);
-
-	/* Get the revision number. */
-	p = sidstr + 2;
-
-	if (!isdigit(*p)) {
-		goto format_error;
-	}
-
-	conv = (uint32_t) strtoul(p, &q, 10);
-	if (!q || (*q != '-')) {
-		goto format_error;
-	}
-	sidout->sid_rev_num = (uint8_t) conv;
-	q++;
-
-	if (!isdigit(*q)) {
-		goto format_error;
-	}
-
-	/* get identauth */
-	conv = (uint32_t) strtoul(q, &q, 10);
-	if (!q) {
-		goto format_error;
-	} else if (*q == '\0') {
-		/* Just id_auth, no subauths */
-	} else if (*q != '-') {
-		goto format_error;
-	}
-	/* identauth in decimal should be <  2^32 */
-	/* NOTE - the conv value is in big-endian format. */
-	sidout->id_auth[0] = 0;
-	sidout->id_auth[1] = 0;
-	sidout->id_auth[2] = (conv & 0xff000000) >> 24;
-	sidout->id_auth[3] = (conv & 0x00ff0000) >> 16;
-	sidout->id_auth[4] = (conv & 0x0000ff00) >> 8;
-	sidout->id_auth[5] = (conv & 0x000000ff);
-
-	sidout->num_auths = 0;
-	if (*q == '\0') {
-		return true;
-	}
-
-	q++;
-
-	while (true) {
-		char *end;
-
-		if (!isdigit(*q)) {
-			goto format_error;
-		}
-
-		conv = strtoul(q, &end, 10);
-		if (end == q) {
-			goto format_error;
-		}
-
-		if (!sid_append_rid(sidout, conv)) {
-			DEBUG(3, ("Too many sid auths in %s\n", sidstr));
-			return false;
-		}
-
-		q = end;
-		if (*q == '\0') {
-			break;
-		}
-		if (*q != '-') {
-			goto format_error;
-		}
-		q += 1;
-	}
-	return true;
-
-format_error:
-	DEBUG(3, ("string_to_sid: SID %s is not in a valid format\n", sidstr));
-	return false;
-}
-
-/*****************************************************************
- Add a rid to the end of a sid
-*****************************************************************/  
-
-bool sid_append_rid(struct dom_sid *sid, uint32_t rid)
-{
-	if (sid->num_auths < ARRAY_SIZE(sid->sub_auths)) {
-		sid->sub_auths[sid->num_auths++] = rid;
-		return true;
-	}
-	return false;
-}
-
 bool sid_compose(struct dom_sid *dst, const struct dom_sid *domain_sid, uint32 rid)
 {
 	sid_copy(dst, domain_sid);