(Classic ASP) RSA Signature SHA256withRSA, iso-8859-1, base64

See more RSA Examples

RSA sign the iso-8859-1 byte representation of a string with SHA256withRSA, and return the signature in the base64 encoding.

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

' This example will duplicate the following Java code:
' 
' Signature sign = Signature.getInstance("SHA256withRSA");
' sign.initSign(privateKey);
' sign.update(original.getBytes(Charset.forName("ISO-8859-1")));
' 
' ...
' byte[] resultado = sign.sign();
' sello = encodeByteArrayToBase64(resultado);
' 

' Load an RSA private key for signing.
' You can load any format file.  This example loads a .pem, but you can provide path to any type of file holding a private key.
set privKey = Server.CreateObject("Chilkat.PrivateKey")
success = privKey.LoadAnyFormatFile("qa_data/pem/rsa_passwd.pem","passwd")
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)

originalData = "This is the string to be hashed an RSA signed."

' Indicate that we want the iso-8859-1 byte representation of the string to be signed
rsa.Charset = "iso-8859-1"

' We want the RSA signature in base64 format
rsa.EncodingMode = "base64"

sigBase64 = rsa.SignStringENC(originalData,"sha256")
Response.Write "<pre>" & Server.HTMLEncode( sigBase64) & "</pre>"

%>
</body>
</html>