(Classic ASP) Get an Ed25519 Key in Raw Hex Format

Demonstrates how to get the private and public key parts of an Ed25519 key in lowercase hex formmat.

Note: This example requires Chilkat v9.5.0.83 or greater.

Chilkat ActiveX Downloads

ActiveX for 32-bit and 64-bit Windows

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

' Load an Ed25519 key from some format..
' For versions of Chilkat < 10.0.0, use CreateObject("Chilkat_9_5_0.PrivateKey")
set privKey = Server.CreateObject("Chilkat.PrivateKey")

' This loads an Ed25519 key from an unencrypted PEM file (no password required).
success = privKey.LoadAnyFormatFile("qa_data/eddsa/ed25519.pem","")
If (success = 0) Then
    Response.Write "<pre>" & Server.HTMLEncode( privKey.LastErrorText) & "</pre>"
    Response.End
End If

' The key type should be "ed25519" to indicate an Ed25519 key.
Response.Write "<pre>" & Server.HTMLEncode( "key type = " & privKey.KeyType) & "</pre>"

' What is the size of the private key in bits?  (should always be 256 bits for Ed25519)
Response.Write "<pre>" & Server.HTMLEncode( "size in bits = " & privKey.BitLength) & "</pre>"

' Get the private and public key parts in raw hex format:
' For versions of Chilkat < 10.0.0, use CreateObject("Chilkat_9_5_0.StringBuilder")
set sbPubKeyHex = Server.CreateObject("Chilkat.StringBuilder")
privKeyHex = privKey.GetRawHex(sbPubKeyHex)

' We should have a 32-byte private key (a 64 character hex string).
Response.Write "<pre>" & Server.HTMLEncode( "private key = " & privKeyHex) & "</pre>"

' We should have a 32-byte public key (a 64 character hex string).
Response.Write "<pre>" & Server.HTMLEncode( "public key = " & sbPubKeyHex.GetAsString()) & "</pre>"

' Sample output:
' key type = ed25519
' size in bits = 256
' private key = d4ee72dbf913584ad5b6d8f1f769f8ad3afe7c28cbf1d4fbe097a88f44755842
' public key = 19bf44096984cdfe8541bac167dc3b96c85086aa30b6b6cb0c5c38ad703166e1

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