Visual Basic 6.0

RSA Encrypt with Modulus and Exponent

See more RSA Examples

Demonstrates how to RSA encrypt with a given modulus and exponent. Visual Basic 6.0

Dim success As Long
success = 0

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

Dim rsa As New ChilkatRsa

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

Dim xml As New ChilkatXml
xml.Tag = "RSAPublicKey"
xml.NewChild2 "Modulus",modulus
xml.NewChild2 "Exponent",exponent

Dim pubKey As New PublicKey
success = pubKey.LoadFromString(xml)
If (success = 0) Then
    Debug.Print pubKey.LastErrorText
    Exit Sub
End If

success = rsa.UsePublicKey(pubKey)
If (success = 0) Then
    Debug.Print rsa.LastErrorText
    Exit Sub
End If

Dim usePrivateKey As Long
usePrivateKey = 0
Dim plainText As String
plainText = "message in a bottle"

rsa.EncodingMode = "base64"
Dim encryptedStrBase64 As String
encryptedStrBase64 = rsa.EncryptStringENC(plainText,usePrivateKey)
Debug.Print encryptedStrBase64