Full schema support

Introduces a new Subschema class. Subschema objects provide access to full schema information and schema-bound Object, RootDSE and DN classes.

ldapserver/schema/rfc4517/matching_rules.py

@@ -59,6 +59,31 @@ class StringMatchingRule(MatchingRule):
 		else:
 			return FilterResult.FALSE
 
+	def match_substr(self, attribute_value, inital_substring, any_substrings, final_substring):
+		try:
+			attribute_value = rfc4518_stringprep.prepare(attribute_value, self.matching_type)
+			if inital_substring:
+				inital_substring = rfc4518_stringprep.prepare(inital_substring, self.matching_type, rfc4518_stringprep.SubstringType.INITIAL)
+			any_substrings = [rfc4518_stringprep.prepare(substring, self.matching_type, rfc4518_stringprep.SubstringType.ANY) for substring in any_substrings]
+			if final_substring:
+				final_substring = rfc4518_stringprep.prepare(final_substring, self.matching_type, rfc4518_stringprep.SubstringType.FINAL)
+		except ValueError:
+			return FilterResult.UNDEFINED
+		if inital_substring:
+			if not attribute_value.startswith(inital_substring):
+				return FilterResult.FALSE
+			attribute_value = attribute_value[len(inital_substring):]
+		if final_substring:
+			if not attribute_value.endswith(final_substring):
+				return FilterResult.FALSE
+			attribute_value = attribute_value[:-len(final_substring)]
+		for substring in any_substrings:
+			index = attribute_value.find(substring)
+			if index == -1:
+				return FilterResult.FALSE
+			attribute_value = attribute_value[index+len(substring):]
+		return FilterResult.TRUE
+
 class StringListMatchingRule(MatchingRule):
 	def __init__(self, oid, name, syntax, matching_type=rfc4518_stringprep.MatchingType.EXACT_STRING):
 		super().__init__(oid, name, syntax)
@@ -132,7 +157,7 @@ ALL = (
 	integerFirstComponentMatch,
 	integerMatch,
 	integerOrderingMatch,
-	keywordMatch,
+	#keywordMatch,
 	numericStringMatch,
 	numericStringOrderingMatch,
 	numericStringSubstringsMatch,
@@ -143,5 +168,5 @@ ALL = (
 	telephoneNumberMatch,
 	telephoneNumberSubstringsMatch,
 	uniqueMemberMatch,
-	wordMatch,
+	#wordMatch,
 )