(Classic ASP) RSA Sign with PKCS8 Encrypted Key

See more RSA Examples

Demonstrates how to load a private key from an encrypted PKCS8 file and create an RSA digital signature.

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>
<%
' 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.PrivateKey")
set pkey = Server.CreateObject("Chilkat.PrivateKey")

' Load the private key from an RSA PEM file:
success = pkey.LoadPkcs8EncryptedFile("privateKey.key","myPassword")

' Get the private key in XML format:
pkeyXml = pkey.GetXml()

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

' Import the private key into the RSA object:
success = rsa.ImportPrivateKey(pkeyXml)
If (success <> 1) Then
    Response.Write "<pre>" & Server.HTMLEncode( rsa.LastErrorText) & "</pre>"
    Response.End
End If

' Return the signature in hex
rsa.EncodingMode = "hex"

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

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

Response.Write "<pre>" & Server.HTMLEncode( hexSig) & "</pre>"

%>
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</html>