(Ruby) Load Base64-encoded X.509 Certificate (.cer)

Loads a digital certificate from a base64 encoded DER X.509 Certificate (.cer, .crt) and fetches information about the cert.

Chilkat Ruby Downloads install from rubygems.org gem install chilkat or download... Ruby Library for Windows, MacOS, Linux, Alpine Linux

require 'chilkat'

cert = Chilkat::CkCert.new()

#  LoadFromFile will load virtually any certificate format file.
#  It will auto-recognize the format and load appropiately.
#  A base64-encoded DER X.509 certificate file
#  contains the binary DER in base64 encoded form.
#  Therefore, it is a text file that will begin like this:
#  -----BEGIN CERTIFICATE-----
#  MIIFbjCCBFagAwIBAgIGdDPNv/L0MA0GCSqGSIb3DQEBBQUAMIHKMQswCQYDVQQG
#  EwJVUzEQMA4GA1UECBMHQXJpem9uYTETMBEGA1UEBxMKU2NvdHRzZGFsZTEaMBgG
#  ...

success = cert.LoadFromFile("/Users/chilkat/testData/cer/chilkat_base64.cer")
if (success != true)
    print cert.lastErrorText() + "\n";
    exit
end

#  DN = "Distinguished Name"
print "SubjectDN:" + cert.subjectDN() + "\n";

print "Common Name:" + cert.subjectCN() + "\n";
print "Issuer Common Name:" + cert.issuerCN() + "\n";

print "Serial Number:" + cert.serialNumber() + "\n";