MD5 Hash a String

ASP example to Digest-MD5 hash an XML document.

Download Chilkat Crypt ActiveX

<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
</head>
<body>
<%
set crypt = Server.CreateObject("Chilkat.Crypt2")

'  Any string argument automatically begins the 30-day trial.
success = crypt.UnlockComponent("30-day trial")
If (success <> 1) Then
    Response.Write "Crypt component unlock failed" & "<br>"

End If

xmlDoc = "<test><a>123</a><b>456</b><c>789</c></test>"

'  This example was created in response to a request to
'  do this:
'  XML-->byte[]-->MD5(byte[])-->Base64(string)

'  The output will be Base64, so set the EncodingMode:
crypt.EncodingMode = "base64"

'  It is desired to hash bytes.  Depending on the programming
'  language, strings may be Unicode (2 bytes/char).  We don't
'  want to hash Unicode.  By setting the Charset property,
'  we're telling the encryption component to first convert
'  a string to the multibyte charset indicated.
crypt.Charset = "windows-1252"

'  Set the hash algorithm:
'  Choices are: md5, sha1, sha256, sha384, sha512, md2, haval
crypt.HashAlgorithm = "md5"

'  Hash the string:
'  Internally, this converts the string to bytes, hashes the bytes,
'  and converts the hash bytes to a Base64 encoded string:

'  Note: Any method in Chilkat Crypt that ends with "ENC" returns the
'  output bytes (i.e. hashed or encrypted) as an encoded string
'  according to the EncodingMode property, which can be "base64",
'  "hex", "url", "quoted-printable", or "html" (for HTML entities).
hashStr = crypt.HashStringENC(xmlDoc)

Response.Write hashStr & "<br>"
%>
</body>
</html>

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