(Classic ASP) 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

<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
</head>
<body>
<%
success = 0

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

set privKey = Server.CreateObject("Chilkat.PrivateKey")

set sbPem = Server.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
    Response.Write "<pre>" & Server.HTMLEncode( privKey.LastErrorText) & "</pre>"
    Response.End
End If

set rsa = Server.CreateObject("Chilkat.Rsa")

success = rsa.UsePrivateKey(privKey)
If (success = 0) Then
    Response.Write "<pre>" & Server.HTMLEncode( rsa.LastErrorText) & "</pre>"
    Response.End
End If

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

success = rsa.SignRawBd(bd)
If (success = 0) Then
    Response.Write "<pre>" & Server.HTMLEncode( rsa.LastErrorText) & "</pre>"
    Response.End
End If

' Get the base64 RSA signature.
Response.Write "<pre>" & Server.HTMLEncode( bd.GetEncoded("base64")) & "</pre>"

success = rsa.VerifyRawBd(bd)
If (success = 0) Then
    Response.Write "<pre>" & Server.HTMLEncode( rsa.LastErrorText) & "</pre>"
    Response.End
End If

strOriginal = bd.GetString("utf-8")
Response.Write "<pre>" & Server.HTMLEncode( strOriginal) & "</pre>"

%>
</body>
</html>