Classic ASP Requires Chilkat v11.6.0+

Hash a Password with Argon2 (Defaults)

Demonstrates Crypt2.Argon2HashPassword, which hashes a password with Argon2 and returns a PHC-format string. Passing an empty options string uses all defaults, including a random salt.

Background. Argon2 (RFC 9106) is a memory-hard function that is deliberately expensive in CPU time and memory, which is what makes brute-forcing the password space costly. The argon2id variant is recommended unless there is a specific reason to choose argon2i or argon2d. The returned PHC string records the variant, version, cost parameters, salt, and hash — everything needed to verify the password later. Store the whole string.

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Classic ASP

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

'  The password should come from a secure source rather than being hard-coded.
password = "correct horse battery staple"

'  Hash the password using all defaults by passing an empty options string.  The defaults are
'  Argon2id, version 19, 3 iterations, 64 MB of memory, 1 lane, a 32-byte hash, and a 16-byte random
'  salt.  A random salt is generated automatically, which is what should normally happen.
phcHash = crypt.Argon2HashPassword(password,"")
If (crypt.LastMethodSuccess = 0) Then
    Response.Write "<pre>" & Server.HTMLEncode( crypt.LastErrorText) & "</pre>"
    Response.End
End If

'  The returned PHC-format string records the variant, version, cost parameters, salt, and hash --
'  everything needed to verify the password later.  Store the whole string.
Response.Write "<pre>" & Server.HTMLEncode( phcHash) & "</pre>"

%>
</body>
</html>