internal static bool TryParse(byte[] data, out byte[] token, out string oid)
{
token = null;
oid = string.Empty;
try {
BinaryReader reader = new BinaryReader(new MemoryStream(data));
byte start = reader.ReadByte();
if (start != 0x60)
{
return(false);
}
int length = DERUtils.ReadLength(reader);
byte[] inner_token = reader.ReadAllBytes(length);
reader = new BinaryReader(new MemoryStream(inner_token));
if (reader.ReadByte() != 0x06)
{
return(false);
}
int oid_length = DERUtils.ReadLength(reader);
oid = DERUtils.ReadObjID(reader.ReadAllBytes(oid_length));
token = reader.ReadAllBytes((int)reader.RemainingLength());
return(true);
} catch (EndOfStreamException) {
return(false);
}
}
internal static DateTime ParseKerberosTime(string s, int usec)
{
if (DERUtils.ParseGeneralizedTime(s, out DateTime time))
{
return(time.AddMilliseconds(usec / 1000));
}
return(DateTime.MinValue);
}
private static DirectoryServiceSchemaObject ConvertToSchemaClass(string domain, Guid?schema_id, DirectoryEntry dir_entry)
{
if (dir_entry is null)
{
return(null);
}
var prop = dir_entry.ToPropertyClass();
string cn = prop.GetPropertyValue <string>(kCommonName);
string ldap_name = prop.GetPropertyValue <string>(kLDAPDisplayName);
string dn = prop.GetPropertyValue <string>(kDistinguishedName);
string description = prop.GetPropertyValue <string>(kAdminDescription);
string class_name = dir_entry.SchemaClassName;
if (schema_id == null)
{
schema_id = prop.GetPropertyGuid(kSchemaIDGUID);
}
if (cn == null || ldap_name == null || !schema_id.HasValue)
{
return(null);
}
switch (class_name.ToLower())
{
case "classschema":
{
string subclass_of = prop.GetPropertyValue <string>(kSubClassOf);
List <DirectoryServiceSchemaClassAttribute> attrs = new List <DirectoryServiceSchemaClassAttribute>();
AddAttributes(attrs, prop.GetPropertyValues <string>(kMustContain), true, false);
AddAttributes(attrs, prop.GetPropertyValues <string>(kSystemMustContain), true, true);
AddAttributes(attrs, prop.GetPropertyValues <string>(kMayContain), false, false);
AddAttributes(attrs, prop.GetPropertyValues <string>(kSystemMayContain), false, true);
var default_security_desc = prop.GetPropertyValue <string>(kDefaultSecurityDescriptor);
return(new DirectoryServiceSchemaClass(domain, dn, schema_id.Value, cn,
ldap_name, description, class_name, subclass_of, attrs, default_security_desc));
}
case "attributeschema":
{
var attribute_syntax = prop.GetPropertyValue <string>("attributeSyntax") ?? string.Empty;
var om_syntax = prop.GetPropertyValue <int>("oMSyntax");
var om_object_class_bytes = prop.GetPropertyValue <byte[]>("oMObjectClass");
string om_object_class_name = string.Empty;
if (om_object_class_bytes?.Length > 0)
{
try
{
om_object_class_name = DERUtils.ReadObjID(om_object_class_bytes);
}
catch (EndOfStreamException)
{
}
}
return(new DirectoryServiceSchemaAttribute(domain, dn, schema_id.Value, cn,
ldap_name, description, class_name, attribute_syntax, om_syntax, om_object_class_name));
}
default:
return(new DirectoryServiceSchemaObject(domain, dn, schema_id.Value, cn,
ldap_name, description, class_name));
}
}
