Create PKCS1 RSA Signature with PEM Private Key

Demonstrates how to load a private key from a PEM file and create a PKCS1 RSA digital signature.

Download Chilkat RSA Public-Key Encryption ActiveX

<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
</head>
<body>
<%
set pkey = Server.CreateObject("Chilkat.PrivateKey")

'  Load the private key from an RSA PEM file:
pkey.LoadPemFile "pvkey2_rsa.pem"

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

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

'  Any string argument automatically begins the 30-day trial.
success = rsa.UnlockComponent("30-day trial")
If (success <> 1) Then
    Response.Write "RSA component unlock failed" & "<br>"

End If

'  Import the private key into the RSA component:
success = rsa.ImportPrivateKey(pkeyXml)
If (success <> 1) Then
    Response.Write rsa.LastErrorText & "<br>"

End If

'  This example will sign a string, and receive the signature
'  in a hex-encoded string.  Therefore, set the encoding mode
'  to "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" and "md5".
hexSig = rsa.SignStringENC(strData,"sha-1")

Response.Write hexSig & "<br>"

Response.Write "Success!" & "<br>"
%>
</body>
</html>

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