(Ruby) RSA Encrypt with Modulus and Exponent

Demonstrates how to RSA encrypt with a given modulus and exponent.

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()

# Assuming you already have a base64 modulus and exponent,
# wrap it in XML like this:
modulus = "qMBRpdYrAy5aMmo31NErUizh5sbweguSmh4wlK6uJEIDl+kwTlROnE34KOFExeTbJSX0WygPi+vWl0yNq7buIMUKpytossAAWut5khO3CQJxTk7G2gnEPNUUXHiExGgNrLzcSLv8YIlfVALhoRWyC67KOL+a+3taNq3h+BHeWhM="
exponent = "AQAB"

xml = Chilkat::CkXml.new()
xml.put_Tag("RSAPublicKey")
xml.NewChild2("Modulus",modulus)
xml.NewChild2("Exponent",exponent)

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

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

usePrivateKey = false
plainText = "message in a bottle"

rsa.put_EncodingMode("base64")
encryptedStrBase64 = rsa.encryptStringENC(plainText,usePrivateKey)
print encryptedStrBase64 + "\n";