Classic ASP

Compute Glacier SHA256 Tree Hash of a File

Computes the Amazon Glacier SHA256 tree hash for a file.

Note: This example requires Chilkat v9.5.0.78 or greater.

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Classic ASP

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

set crypt = Server.CreateObject("Chilkat.Crypt2")

' For more information about Amazon Glacier tree hashes, see Computing Glacier Checksums
' Chilkat added the "sha256-tree-hash" algorithm in v9.5.0.78 to make it easy to compute the Glacier tree hash checksum
' of a file or from bytes in memory.
crypt.HashAlgorithm = "sha256-tree-hash"

' Return the hash in lowercase hexidecimal format.
crypt.EncodingMode = "hexlower"

treeHashHex = crypt.HashFileENC("qa_data/jpg/penguins.jpg")
Response.Write "<pre>" & Server.HTMLEncode( "SHA256 tree hash = " & treeHashHex) & "</pre>"

%>
</body>
</html>