Bug 570905 - postalAddress syntax should allow empty lines (should allow $$)

https://bugzilla.redhat.com/show_bug.cgi?id=570905
Resolves: bug 570905
Bug Description: postalAddress syntax should allow empty lines (should allow $$)
Reviewed by: nhosoi (Thanks!)
Branch: HEAD
Fix Description: Even though RFC 4517 says a postal address syntax value
should not contain empty lines (e.g. $$), most, if not all, current
applications expect to be able to store $$.  This adds an internal switch
to allow support for $$ for now.
Platforms tested: RHEL5 x86_64
Flag Day: no
Doc impact: no

ldap/servers/plugins/syntaxes/cis.c

@@ -78,6 +78,15 @@ static int postal_validate(struct berval *val);
 static int oid_validate(struct berval *val);
 static int printable_validate(struct berval *val);
 
+/*
+  Even though the official RFC 4517 says that the postal syntax
+  line values must contain at least 1 character (i.e. no $$), it
+  seems that most, if not all, address book and other applications that
+  use postal address syntax values expect to be able to store empty
+  lines/values - so for now, allow it
+*/
+static const int postal_allow_empty_lines = 1;
+
 /*
  * Attribute syntaxes. We treat all of these the same for now, even though
  * the specifications (e.g., RFC 2252) impose various constraints on the
@@ -989,19 +998,14 @@ static int postal_validate(
 			} else if (*p == '$') {
 				/* This signifies the end of a line.  We need
 				 * to ensure that the line is not empty. */
-				if (p == start) {
-					rc = 1;
-					goto exit;
-				}
-
 				/* make sure the value doesn't end with a '$' */
-				if (p == end) {
-					rc = 1;
-					goto exit;
-				}
-
-				/* Make sure the line (start to p) is valid UTF-8. */
-				if ((rc = utf8string_validate(start, p, NULL)) != 0) {
+				if ((p == start) || (p == end)) {
+					if (!postal_allow_empty_lines) {
+						rc = 1;
+						goto exit;
+					} /* else allow it */
+				} else if ((rc = utf8string_validate(start, p, NULL)) != 0) {
+					/* Make sure the line (start to p) is valid UTF-8. */
 					goto exit;
 				}