Ruby

Get Certificate User Principal Name (UPN)

See more Certificates Examples

Demonstrates how to get a certificate's UPN from the SAN (Subject Alternative Name). Most certificates do not have a UPN. This example only applies to those certificates that have a User Principal Name.

Note: This example requires Chilkat v9.5.0.90 or greater due to fixes made in getting the UPN from the SAN.

Ruby

require 'chilkat'

success = false

cert = Chilkat::CkCert.new()

success = cert.LoadFromFile("qa_data/certs/sample.cer")
if (success == false)
    print cert.lastErrorText() + "\n";
    exit
end

xml = Chilkat::CkXml.new()
xml.LoadXml(cert.subjectAlternativeName())
print xml.getXml() + "\n";

# A certificate with a User Principal Name in the SAN might have this:

# <SubjectAltName>
#     <rfc822Name>joe@example.com</rfc822Name>
#     <name type="oid" oid="1.3.6.1.4.1.311.20.2.3">joe@example.com</name>
# </SubjectAltName>

# The OID 1.3.6.1.4.1.311.20.2.3 is for the User Principal Name.
upn = xml.chilkatPath("/A/name,oid,1.3.6.1.4.1.311.20.2.3|*")
if (xml.get_LastMethodSuccess() == false)
    print "No user principle name." + "\n";
else
    print "User Principle Name = " + upn + "\n";
end