(CkPython) Generating Repeatable Random Data for Testing/Debugging

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

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import sys
import chilkat

# All Chilkat classes can be unlocked at once at the beginning of a program
# by calling UnlockBundle.  It requires a Bundle unlock code.
chilkatGlob = chilkat.CkGlobal()
success = chilkatGlob.UnlockBundle("Anything for 30-day trial.")
if (success != True):
    print(chilkatGlob.lastErrorText())
    sys.exit()

fortuna = chilkat.CkPrng()

# 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")

print("hex random bytes: " + strRandHex)
print("base64 random bytes: " + strRandBase64)
print("base58 random bytes: " + strRandBase58)

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

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")

print("hex random bytes: " + strRandHex)
print("base64 random bytes: " + strRandBase64)
print("base58 random bytes: " + strRandBase58)