(Excel) RSA Encrypt with Modulus and Exponent

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

Download Excel Class Modules Chilkat Excel Class Modules

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

Dim rsa As Chilkat.Rsa
Set rsa = Chilkat.NewRsa

' Assuming you already have a base64 modulus and exponent,
' wrap it in XML like this:

modulus = "qMBRpdYrAy5aMmo31NErUizh5sbweguSmh4wlK6uJEIDl+kwTlROnE34KOFExeTbJSX0WygPi+vWl0yNq7buIMUKpytossAAWut5khO3CQJxTk7G2gnEPNUUXHiExGgNrLzcSLv8YIlfVALhoRWyC67KOL+a+3taNq3h+BHeWhM="

exponent = "AQAB"

Dim xml As Chilkat.Xml
Set xml = Chilkat.NewXml
xml.Tag = "RSAPublicKey"
xml.NewChild2 "Modulus",modulus
xml.NewChild2 "Exponent",exponent

' Encrypt with the public key.

publicKey = xml.GetXml()

success = rsa.ImportPublicKey(publicKey)


usePrivateKey = False

plainText = "message in a bottle"

rsa.EncodingMode = "base64"

encryptedStrBase64 = rsa.EncryptStringENC(plainText,usePrivateKey)
Debug.Print encryptedStrBase64