Go

Generating Repeatable Random Data for Testing/Debugging

See more PRNG Examples

Demonstrates how to use the Fortuna PRNG to generate random-looking but repeatable non-random data for the purpose of testing and debugging. Go

    success := false

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

    success = false

    fortuna := chilkat.NewPrng()

    // Normally an application would seed the PRNG with entropy from
    // some real random source.  However, sometimes we want the same
    // random sequence of bytes for testing and debugging purposes.
    // This a reason why GetEntropy and AddEntropy are two different methods.
    // An application could omit the call to GetEntropy, and instead pass
    // non-random data to AddEntropy. For example:

    // Seed the PRNG with non-entropy, so we get a repeatable sequence.
    // Note: AddEntropy can be called any number of times.
    success = fortuna.AddEntropy("01020304","hex")
    success = fortuna.AddEntropy("hello world","ascii")

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

    fmt.Println("hex random bytes: ", *strRandHex)
    fmt.Println("base64 random bytes: ", *strRandBase64)
    fmt.Println("base58 random bytes: ", *strRandBase58)

    // Try it again with a different object to verify that the same results are obtained:
    fortuna2 := chilkat.NewPrng()

    success = fortuna2.AddEntropy("01020304","hex")
    success = fortuna2.AddEntropy("hello world","ascii")

    strRandHex = fortuna2.GenRandom(16,"hex")
    strRandBase64 = fortuna2.GenRandom(22,"base64")
    strRandBase58 = fortuna2.GenRandom(32,"base58")

    fmt.Println("hex random bytes: ", *strRandHex)
    fmt.Println("base64 random bytes: ", *strRandBase64)
    fmt.Println("base58 random bytes: ", *strRandBase58)

    fortuna.DisposePrng()
    fortuna2.DisposePrng()