(VBScript) RSA Sign using Base64 Private Key

Signs a string using a non-encrypted RSA private key in base64 encoding. Returns the RSA signature as a base64 string.

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

set privKey = CreateObject("Chilkat.PrivateKey")

set sbPem = CreateObject("Chilkat.StringBuilder")
success = sbPem.AppendLine("-----BEGIN RSA PRIVATE KEY-----",1)
success = sbPem.AppendLine("MIIC .... j5A==",1)
success = sbPem.AppendLine("-----END RSA PRIVATE KEY-----",1)

success = privKey.LoadPem(sbPem.GetAsString())
If (success = 0) Then
    outFile.WriteLine(privKey.LastErrorText)
    WScript.Quit
End If

set rsa = CreateObject("Chilkat.Rsa")

success = rsa.UsePrivateKey(privKey)
If (success = 0) Then
    outFile.WriteLine(rsa.LastErrorText)
    WScript.Quit
End If

set bd = CreateObject("Chilkat.BinData")
success = bd.AppendString("12345678","utf-8")

success = rsa.SignRawBd(bd)
If (success = 0) Then
    outFile.WriteLine(rsa.LastErrorText)
    WScript.Quit
End If

' Get the base64 RSA signature.
outFile.WriteLine(bd.GetEncoded("base64"))

success = rsa.VerifyRawBd(bd)
If (success = 0) Then
    outFile.WriteLine(rsa.LastErrorText)
    WScript.Quit
End If

strOriginal = bd.GetString("utf-8")
outFile.WriteLine(strOriginal)

outFile.Close