(Ruby) RSA OAEP Padding

Demonstrates how to use OAEP padding with the RSA encryption algorithm. More information about OAEP Padding.

Note: This example requires Chilkat v11.0.0 or greater.

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

require 'chilkat'

success = false

# This example assumes the Chilkat API to have been previously unlocked.
# See Global Unlock Sample for sample code.

rsa = Chilkat::CkRsa.new()

# RSA public key in XML format:
pubKeyXml = "<RSAPublicKey><Modulus>of3im3mRgd2NLXIGoK6uYLg6jj0Ug2b42rnqa5Tbwz2ieFqMJqt+++x2oqLYGurlz49nt+7/785g3XYWqoka4u9c9zul6YubIjnBM72dQy7rEkEfbUxgjcxqXyjZFx+FpaxFUecLu688XEu+9UA42VKiCgcl+E7TrqnfeeYpNXc=</Modulus><Exponent>AQAB</Exponent></RSAPublicKey>"

pubKey = Chilkat::CkPublicKey.new()
success = pubKey.LoadFromString(pubKeyXml)
if (success == false)
    print pubKey.lastErrorText() + "\n";
    exit
end

success = rsa.UsePublicKey(pubKey)
if (success == false)
    print rsa.lastErrorText() + "\n";
    exit
end

# To use Optimal Asymmetric Encryption Padding (OAEP) padding,
# simply set the PkcsPadding property to false
rsa.put_PkcsPadding(false)

# Encrypt a string and return the encrypted data base64-encoded:
rsa.put_EncodingMode("base64")

plainText = "RSA Encryption should be easy."

usePrivateKey = false
encryptedStr = rsa.encryptStringENC(plainText,usePrivateKey)
print encryptedStr + "\n";