(Classic ASP) Write PKCS1 or PKCS8 Public Key PEM

Demonstrates how to write either PKCS1 or PKCS8 format PEM files. PKCS1 public keys have this PEM format:

-----BEGIN RSA PUBLIC KEY-----
BASE64 ENCODED DATA
-----END RSA PUBLIC KEY-----

PKCS8 public keys have this PEM format:

-----BEGIN PUBLIC KEY-----
BASE64 ENCODED DATA
-----END PUBLIC KEY-----

Chilkat ActiveX Downloads

ActiveX for 32-bit and 64-bit Windows

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' Unlock the Chilkat API.
' Starting in v9.5.0.49, all Chilkat classes can be unlocked at once at the beginning of a program
' by calling UnlockBundle.  It requires a Bundle unlock code.
' For versions of Chilkat < 10.0.0, use CreateObject("Chilkat_9_5_0.Global")
set chilkatGlob = Server.CreateObject("Chilkat.Global")
success = chilkatGlob.UnlockBundle("Anything for 30-day trial.")
If (success <> 1) Then
    Response.Write "<pre>" & Server.HTMLEncode( chilkatGlob.LastErrorText) & "</pre>"
    Response.End
End If

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

' Load a public key from a PEM file.
' (Assume the PEM contains at least one public key..)
success = pem.LoadPemFile("/Users/chilkat/testData/pem/myPublicKey.pem")
If (success <> 1) Then
    Response.Write "<pre>" & Server.HTMLEncode( pem.LastErrorText) & "</pre>"
    Response.End
End If

numPublicKeys = pem.NumPublicKeys
If (numPublicKeys = 0) Then
    Response.Write "<pre>" & Server.HTMLEncode( ("Error: Expected the PEM to contain public keys.")) & "</pre>"
    Response.End
End If

' Get each public key as PEM, first in PKCS1 format, then in PKCS8.
For i = 1 To numPublicKeys

    ' First output to PKCS1 PEM format:
    Response.Write "<pre>" & Server.HTMLEncode( "This is PKCS1 format:") & "</pre>"
    pem.PublicKeyFormat = "pkcs1"
    Response.Write "<pre>" & Server.HTMLEncode( pem.ToPem()) & "</pre>"

    ' Now PKCS8 PEM format:
    Response.Write "<pre>" & Server.HTMLEncode( "This is PKCS8 format:") & "</pre>"
    pem.PublicKeyFormat = "pkcs8"
    Response.Write "<pre>" & Server.HTMLEncode( pem.ToPem()) & "</pre>"

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