(Classic ASP) Hash Binary Data (SHA256 and other hash algorithms)

Demonstrates how to hash binary bytes using SHA256, SHA384, SHA512, MD2, MD5, HAVAL, RIPEMD, etc.

Chilkat ActiveX Downloads

ActiveX for 32-bit and 64-bit Windows

<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
</head>
<body>
<%
' This example requires the Chilkat Crypt API to have been previously unlocked.
' See Unlock Chilkat Crypt for sample code.

' Let's load a binary file to get the bytes..
' For versions of Chilkat < 10.0.0, use CreateObject("Chilkat_9_5_0.BinData")
set jpgData = Server.CreateObject("Chilkat.BinData")
success = jpgData.LoadFile("qa_data/jpg/starfish.jpg")
If (success <> 1) Then
    Response.Write "<pre>" & Server.HTMLEncode( "Failed to load file.") & "</pre>"
    Response.End
End If

jpgBytes = jpgData.GetBinary()

' For versions of Chilkat < 10.0.0, use CreateObject("Chilkat_9_5_0.Crypt2")
set crypt = Server.CreateObject("Chilkat.Crypt2")

' Choose the hash algorithm.
' Can be  "sha1", "sha256", "sha384", "sha512", "md2", "md5", "haval", "ripemd128", "ripemd160","ripemd256", or "ripemd320".
crypt.HashAlgorithm = "sha256"

hashBytes = crypt.HashBytes(jpgBytes)

' Let's examine the hash as a hex string.
' For versions of Chilkat < 10.0.0, use CreateObject("Chilkat_9_5_0.StringBuilder")
set sb = Server.CreateObject("Chilkat.StringBuilder")
success = sb.AppendEncoded(hashBytes,"hex")
Response.Write "<pre>" & Server.HTMLEncode( "SHA256 hash = " & sb.GetAsString()) & "</pre>"

' We could alternatively hash the bytes and receive the hex result directly:
crypt.EncodingMode = "hex"
hashHexStr = crypt.HashBytesENC(jpgBytes)
Response.Write "<pre>" & Server.HTMLEncode( "SHA256 hash = " & hashHexStr) & "</pre>"

%>
</body>
</html>