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(Visual Basic 6.0) 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

' All Chilkat classes can be unlocked at once at the beginning of a program
' by calling UnlockBundle.  It requires a Bundle unlock code.
Dim chilkatGlob As New ChilkatGlobal
Dim success As Long
success = chilkatGlob.UnlockBundle("Anything for 30-day trial.")
If (success <> 1) Then
    Debug.Print chilkatGlob.LastErrorText
    Exit Sub
End If

Dim fortuna As New ChilkatPrng

' 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.
Dim strEntropy As String
strEntropy = fortuna.GetEntropy(32,"hex")
If (fortuna.LastMethodSuccess <> 1) Then
    Debug.Print fortuna.LastErrorText
    Exit Sub
End If

' Seed the PRNG with this entropy:
success = fortuna.AddEntropy(strEntropy,"hex")
If (success <> 1) Then
    Debug.Print fortuna.LastErrorText
    Exit Sub
End If

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

Debug.Print "hex random bytes: " & strRandHex
Debug.Print "base64 random bytes: " & strRandBase64
Debug.Print "base58 random bytes: " & strRandBase58

 

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