Classic ASP

Export a Private Key as DER into a BinData

Demonstrates the Chilkat PrivateKey.GetPkcsBd method, which exports the key as DER into a BinData. The first argument selects PKCS #1 (true) versus PKCS #8 (false), the second is the password (empty for unencrypted), and the third is the BinData that receives the bytes.

Note: The file paths are relative to the application's current working directory. Absolute paths may also be used. Supply the paths appropriate to your own environment.

Background: This is the in-memory binary export — the raw DER bytes land in a BinData ready to hash, encrypt, or hand to another API without a temporary file. One method covers several cases: the boolean picks the traditional (PKCS #1) versus modern (PKCS #8) structure, and a nonempty password produces an encrypted PKCS #8 export (with the cipher from Pkcs8EncryptAlg). Source any password securely.

Chilkat Classic ASP Downloads

Download Chilkat for Classic ASP

Classic ASP

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

'  Load a private key to export.
set privKey = Server.CreateObject("Chilkat.PrivateKey")
success = privKey.LoadPemFile("qa_data/private.pem")
If (success = 0) Then
    Response.Write "<pre>" & Server.HTMLEncode( privKey.LastErrorText) & "</pre>"
    Response.End
End If

'  The key password is not hard-coded in a real application; obtain it from an interactive
'  prompt, environment variable, or a secrets vault.
password = "myKeyPassword"

'  Export the key as DER into a BinData.  The 1st argument selects PKCS #1 (1) versus PKCS #8
'  (0); the 2nd is the password (empty string for an unencrypted export); the 3rd is the
'  BinData that receives the DER bytes.
usePkcs1 = 0
set bd = Server.CreateObject("Chilkat.BinData")
success = privKey.GetPkcsBd(usePkcs1,password,bd)
If (success = 0) Then
    Response.Write "<pre>" & Server.HTMLEncode( privKey.LastErrorText) & "</pre>"
    Response.End
End If

Response.Write "<pre>" & Server.HTMLEncode( "Exported " & bd.NumBytes & " DER bytes.") & "</pre>"

%>
</body>
</html>