(Ruby) X509Certificate GetCertHash SHA256

See more Certificates Examples

Shows how to get the SHA256 hash of a certificate.

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()

# Load a certificate object with a certificate.
# The certificate object could have come from any source,
# or perhaps was obtained from another Chilkat function.
# The source does not matter.  What matters is that we have
# a cert object loaded with the certificate..
success = cert.LoadFromFile("qa_data/certs/cert_test123.cer")
if (success != true)
    print cert.lastErrorText() + "\n";
    exit
end

# Get the binary DER of the certificae, and compute the SHA256 hash:
bdDer = Chilkat::CkBinData.new()
cert.ExportCertDerBd(bdDer)

# Get the base64 representation of the SHA256 hash.
certHash = bdDer.getHash("sha256","base64")

print "Certificate hash in base64 = " + certHash + "\n";