Classic ASP Requires Chilkat v11.0.0+
Generate ECDSA Key and Get Details as XML

Demonstrates how to generate an ECDSA key and gets the parts as XML.
Chilkat Classic ASP Downloads

Classic ASP
<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 ecc = Server.CreateObject("Chilkat.Ecc")

'  Generate a random ECC private key on the secp256k1 curve.
'  Chilkat also supports other curves, such as secp384r1, secp521r1, and secp256r1.

'  Create a Fortuna PRNG and seed it with system entropy.
'  This will be our source of random data for generating the ECC private key.
set fortuna = Server.CreateObject("Chilkat.Prng")
entropy = fortuna.GetEntropy(32,"base64")
success = fortuna.AddEntropy(entropy,"base64")

set privKey = Server.CreateObject("Chilkat.PrivateKey")
success = ecc.GenKey("secp256k1",fortuna,privKey)
If (success = 0) Then
    Response.Write "<pre>" & Server.HTMLEncode( ecc.LastErrorText) & "</pre>"
    Response.End
End If

'  An EC private key has this ASN.1
'  ECPrivateKey ::= SEQUENCE {
'      version        INTEGER { ecPrivkeyVer1(1) } (ecPrivkeyVer1),
'      privateKey     OCTET STRING,
'      parameters [0] ECParameters {{ NamedCurve }} OPTIONAL,
'      publicKey  [1] BIT STRING OPTIONAL (This is the ANSI X9.63 public key format.)

set asn = Server.CreateObject("Chilkat.Asn")
success = asn.LoadEncoded(privKey.GetPkcs1ENC("base64"),"base64")
If (success <> 1) Then
    Response.Write "<pre>" & Server.HTMLEncode( asn.LastErrorText) & "</pre>"
    Response.End
End If

set xml = Server.CreateObject("Chilkat.Xml")
success = xml.LoadXml(asn.AsnToXml())

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

'  The XML looks like this:
'  <?xml version="1.0" encoding="utf-8" ?>
'  <sequence>
'      <int>01</int>
'      <octets>JgJvBG+3wletkJab8iXAkpz0O8/AgWZSpkYVcB7SpnU=</octets>
'      <contextSpecific tag="0" constructed="1">
'          <oid>1.3.132.0.10</oid>
'      </contextSpecific>
'  </sequence>

'  The 32-byte private key is in the octets..
'  Get it as hex.
set crypt = Server.CreateObject("Chilkat.Crypt2")
privKeyHex = crypt.ReEncode(xml.GetChildContent("octets"),"base64","hex")

Response.Write "<pre>" & Server.HTMLEncode( "EC private key as hex = " & privKeyHex) & "</pre>"

%>
</body>
</html>