(Classic ASP) Fortuna PRNG Generate Random Encoded

Demonstrates how to generate random bytes using the Fortuna PRNG. The random bytes are returned in an encoded string (using an encoding such as hex, base64, base58, etc.)

Chilkat ActiveX Downloads

ActiveX for 32-bit and 64-bit Windows

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<%
' All Chilkat classes can be unlocked at once at the beginning of a program
' by calling UnlockBundle.  It requires a Bundle unlock code.
' For versions of Chilkat < 10.0.0, use CreateObject("Chilkat_9_5_0.Global")
set chilkatGlob = Server.CreateObject("Chilkat.Global")
success = chilkatGlob.UnlockBundle("Anything for 30-day trial.")
If (success <> 1) Then
    Response.Write "<pre>" & Server.HTMLEncode( chilkatGlob.LastErrorText) & "</pre>"
    Response.End
End If

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

' Before beginning to generate random data, 
' the PRNG (Pseudo Random Number Generator) should
' be seeded with real random data (also known as "entropy").

' Note: Accumulating real random data can be difficult
' and time-consuming to collect.  It is for this reason
' that pseudorandom data (i.e. a PRNG) is used.  The pseudorandom data generator
' is seeded with entropy.  In addition, new entropy can (and should)
' be periodically added as more pseudorandom data is generated.

' Get 32 bytes of system entropy.  On Linux/Unix systems, this reads
' from /dev/random.  On MS Windows systems, it uses the Crypto API's 
' CryptGenRandom function.
strEntropy = fortuna.GetEntropy(32,"hex")
If (fortuna.LastMethodSuccess <> 1) Then
    Response.Write "<pre>" & Server.HTMLEncode( fortuna.LastErrorText) & "</pre>"
    Response.End
End If

' Seed the PRNG with this entropy:
success = fortuna.AddEntropy(strEntropy,"hex")
If (success <> 1) Then
    Response.Write "<pre>" & Server.HTMLEncode( fortuna.LastErrorText) & "</pre>"
    Response.End
End If

' Generate some random data:
strRandHex = fortuna.GenRandom(16,"hex")
strRandBase64 = fortuna.GenRandom(22,"base64")
strRandBase58 = fortuna.GenRandom(32,"base58")

Response.Write "<pre>" & Server.HTMLEncode( "hex random bytes: " & strRandHex) & "</pre>"
Response.Write "<pre>" & Server.HTMLEncode( "base64 random bytes: " & strRandBase64) & "</pre>"
Response.Write "<pre>" & Server.HTMLEncode( "base58 random bytes: " & strRandBase58) & "</pre>"

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