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(Xojo Plugin) 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 Xojo Plugin Download

Xojo Plugin for Windows, Linux, Mac OS X, and ARM

// 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 Chilkat.CkGlobal
Dim success As Boolean
success = chilkatGlob.UnlockBundle("Anything for 30-day trial.")
If (success <> True) Then
    System.DebugLog(chilkatGlob.LastErrorText)
    Return
End If

Dim fortuna As New 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.
Dim strEntropy As String
strEntropy = fortuna.GetEntropy(32,"hex")
If (fortuna.LastMethodSuccess <> True) Then
    System.DebugLog(fortuna.LastErrorText)
    Return
End If

// Seed the PRNG with this entropy:
success = fortuna.AddEntropy(strEntropy,"hex")
If (success <> True) Then
    System.DebugLog(fortuna.LastErrorText)
    Return
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")

System.DebugLog("hex random bytes: " + strRandHex)
System.DebugLog("base64 random bytes: " + strRandBase64)
System.DebugLog("base58 random bytes: " + strRandBase58)

 

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