(Ruby) secp256k1 Key Generation and Keccak-256

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Note: This example requires Chilkat v11.0.0 or greater.

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require 'chilkat'

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

# Create a Fortuna PRNG and seed it with system entropy.
# This will be our source of random data for generating the ECDSA private key.
fortuna = Chilkat::CkPrng.new()
entropy = fortuna.getEntropy(32,"base64")
success = fortuna.AddEntropy(entropy,"base64")

ecc = Chilkat::CkEcc.new()

# Generate a random ECDSA private key on the secp256k1 curve.
# privKey is a CkPrivateKey
privKey = ecc.GenEccKey("secp256k1",fortuna)
if (ecc.get_LastMethodSuccess() != true)
    print ecc.lastErrorText() + "\n";
    exit
end

print "Successfully generated a sec256k1 key." + "\n";

# Show how to compute the Keccak-256 hash in a few ways.
sb = Chilkat::CkStringBuilder.new()
sb.Append("hello")

print "keccak-256: " + sb.getHash("keccak-256","hex_lower","utf-8") + "\n";

# Output:
# keccak-256: 1c8aff950685c2ed4bc3174f3472287b56d9517b9c948127319a09a7a36deac8

# To keccak-256 hash binary data
bd = Chilkat::CkBinData.new()
bd.AppendEncoded("00010203040506","hex")

print "keccak-256: " + bd.getHash("keccak-256","hex_lower") + "\n";

# Output:
# keccak-256: 801560412425120fa609be232d6fa71c7f64f42aee7977267687dcc0a2f5aa63