(VBScript) 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 ActiveX Downloads ActiveX for 32-bit and 64-bit Windows

Dim fso, outFile
Set fso = CreateObject("Scripting.FileSystemObject")
'Create a Unicode (utf-16) output text file.
Set outFile = fso.CreateTextFile("output.txt", True, True)

success = 0

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

set rsa = CreateObject("Chilkat.Rsa")

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

set xml = CreateObject("Chilkat.Xml")
xml.Tag = "RSAPublicKey"
xml.NewChild2 "Modulus",modulus
xml.NewChild2 "Exponent",exponent

set pubKey = CreateObject("Chilkat.PublicKey")
success = pubKey.LoadFromString(xml)
If (success = 0) Then
    outFile.WriteLine(pubKey.LastErrorText)
    WScript.Quit
End If

success = rsa.UsePublicKey(pubKey)
If (success = 0) Then
    outFile.WriteLine(rsa.LastErrorText)
    WScript.Quit
End If

usePrivateKey = 0
plainText = "message in a bottle"

rsa.EncodingMode = "base64"
encryptedStrBase64 = rsa.EncryptStringENC(plainText,usePrivateKey)
outFile.WriteLine(encryptedStrBase64)

outFile.Close