PowerBuilder

Fortuna PRNG Generate Random Encoded

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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.) PowerBuilder

integer li_rc
integer li_Success
oleobject loo_Fortuna
string ls_StrEntropy
string ls_StrRandHex
string ls_StrRandBase64
string ls_StrRandBase58

li_Success = 0

// This example assumes the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

li_Success = 0

loo_Fortuna = create oleobject
li_rc = loo_Fortuna.ConnectToNewObject("Chilkat.Prng")
if li_rc < 0 then
    destroy loo_Fortuna
    MessageBox("Error","Connecting to COM object failed")
    return
end if

// 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.
ls_StrEntropy = loo_Fortuna.GetEntropy(32,"hex")
if loo_Fortuna.LastMethodSuccess <> 1 then
    Write-Debug loo_Fortuna.LastErrorText
    destroy loo_Fortuna
    return
end if

// Seed the PRNG with this entropy:
li_Success = loo_Fortuna.AddEntropy(ls_StrEntropy,"hex")
if li_Success <> 1 then
    Write-Debug loo_Fortuna.LastErrorText
    destroy loo_Fortuna
    return
end if

// Generate some random data:
ls_StrRandHex = loo_Fortuna.GenRandom(16,"hex")
ls_StrRandBase64 = loo_Fortuna.GenRandom(22,"base64")
ls_StrRandBase58 = loo_Fortuna.GenRandom(32,"base58")

Write-Debug "hex random bytes: " + ls_StrRandHex
Write-Debug "base64 random bytes: " + ls_StrRandBase64
Write-Debug "base58 random bytes: " + ls_StrRandBase58


destroy loo_Fortuna