OID - Object Identifier

Owned by Roger Cruz
Last updated: Jan 04, 2021
1 min read

Intro

OIDs (Object Identifiers) provide a globally unique name to objects and they are named in a tree-like hierachy. For example, an SSL certificate field named “Subject Alternative Name” has an OID of 2.5.29.17 when given in “dot notation” or {joint-iso-itu-t(2) ds(5) certificateExtension(29) subjectAltName(17)} in ASN.1 notation.

 

You can view registered OIDs here: http://www.oid-info.com/

 

C# Oid Class

Cryptographic object identifiers consist of a value/name pair. If one property in a pair is set to a known value, the other property is updated automatically to a corresponding value. For example, if the Value property is set to "1.3.6.1.5.5.7.3.4", the FriendlyName property, which is localized, is set automatically to "Secure Email".

using System.Security.Cryptography; Oid subjectAlternativeNameOid= new Oid("2.5.29.17");