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(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.
<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.. set jpgData = Server.CreateObject("Chilkat_9_5_0.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() set crypt = Server.CreateObject("Chilkat_9_5_0.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. set sb = Server.CreateObject("Chilkat_9_5_0.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> |
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