Classic ASP

X509Certificate GetCertHash SHA256

Shows how to get the SHA256 hash of a certificate.

Chilkat Classic ASP Downloads

Classic ASP

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

set cert = Server.CreateObject("Chilkat.Cert")

' Load a certificate object with a certificate.
' The certificate object could have come from any source,
' or perhaps was obtained from another Chilkat function.
' The source does not matter.  What matters is that we have
' a cert object loaded with the certificate..
success = cert.LoadFromFile("qa_data/certs/cert_test123.cer")
If (success <> 1) Then
    Response.Write "<pre>" & Server.HTMLEncode( cert.LastErrorText) & "</pre>"
    Response.End
End If

' Get the binary DER of the certificae, and compute the SHA256 hash:
set bdDer = Server.CreateObject("Chilkat.BinData")
success = cert.ExportCertDerBd(bdDer)

' Get the base64 representation of the SHA256 hash.
certHash = bdDer.GetHash("sha256","base64")

Response.Write "<pre>" & Server.HTMLEncode( "Certificate hash in base64 = " & certHash) & "</pre>"

%>
</body>
</html>