(VBScript) RSA Sign Using Private Key from .pfx/.p12 to Base64 Signature

See more RSA Examples

Demonstrates how to RSA sign something using a private key loaded from a .pfx/.p12. The RSA signature is returned in Base64 encoded format.

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)

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

' For versions of Chilkat < 10.0.0, use CreateObject("Chilkat_9_5_0.Rsa")
set rsa = CreateObject("Chilkat.Rsa")

' Load the .pfx/.p12
' For versions of Chilkat < 10.0.0, use CreateObject("Chilkat_9_5_0.Pfx")
set pfx = CreateObject("Chilkat.Pfx")
success = pfx.LoadPfxFile("qa_data/pfx/myKey.p12","myPassword")
If (success <> 1) Then
    outFile.WriteLine(pfx.LastErrorText)
    WScript.Quit
End If

' Get the default private key.
' privKey is a Chilkat.PrivateKey
Set privKey = pfx.GetPrivateKey(0)
If (pfx.LastMethodSuccess <> 1) Then
    outFile.WriteLine(pfx.LastErrorText)
    WScript.Quit
End If

' Import the private key into the RSA component:
success = rsa.ImportPrivateKeyObj(privKey)
If (success <> 1) Then
    outFile.WriteLine(rsa.LastErrorText)

    WScript.Quit
End If

' Get the signature in base64
rsa.EncodingMode = "base64"

strData = "This is the string to be signed."

' Sign the string using the sha256 hash algorithm.
' Other valid choices are "sha384", "sha512", "sha-1", "md2" and "md5".
base64Sig = rsa.SignStringENC(strData,"sha256")

outFile.WriteLine(base64Sig)

outFile.WriteLine("Success!")

outFile.Close