(PureBasic) 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 PureBasic Module Download Chilkat PureBasic Module

IncludeFile "CkPrng.pb"
IncludeFile "CkGlobal.pb"

Procedure ChilkatExample()

    ; All Chilkat classes can be unlocked at once at the beginning of a program
    ; by calling UnlockBundle.  It requires a Bundle unlock code.
    chilkatGlob.i = CkGlobal::ckCreate()
    If chilkatGlob.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    success.i = CkGlobal::ckUnlockBundle(chilkatGlob,"Anything for 30-day trial.")
    If success <> 1
        Debug CkGlobal::ckLastErrorText(chilkatGlob)
        CkGlobal::ckDispose(chilkatGlob)
        ProcedureReturn
    EndIf

    fortuna.i = CkPrng::ckCreate()
    If fortuna.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    ; 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.s = CkPrng::ckGetEntropy(fortuna,32,"hex")
    If CkPrng::ckLastMethodSuccess(fortuna) <> 1
        Debug CkPrng::ckLastErrorText(fortuna)
        CkGlobal::ckDispose(chilkatGlob)
        CkPrng::ckDispose(fortuna)
        ProcedureReturn
    EndIf

    ; Seed the PRNG with this entropy:
    success = CkPrng::ckAddEntropy(fortuna,strEntropy,"hex")
    If success <> 1
        Debug CkPrng::ckLastErrorText(fortuna)
        CkGlobal::ckDispose(chilkatGlob)
        CkPrng::ckDispose(fortuna)
        ProcedureReturn
    EndIf

    ; Generate some random data:
    strRandHex.s = CkPrng::ckGenRandom(fortuna,16,"hex")
    strRandBase64.s = CkPrng::ckGenRandom(fortuna,22,"base64")
    strRandBase58.s = CkPrng::ckGenRandom(fortuna,32,"base58")

    Debug "hex random bytes: " + strRandHex
    Debug "base64 random bytes: " + strRandBase64
    Debug "base58 random bytes: " + strRandBase58


    CkGlobal::ckDispose(chilkatGlob)
    CkPrng::ckDispose(fortuna)


    ProcedureReturn
EndProcedure