(Lianja) secp256k1 Key Generation and Keccak-256

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

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// 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.
loFortuna = createobject("CkPrng")
lcEntropy = loFortuna.GetEntropy(32,"base64")
llSuccess = loFortuna.AddEntropy(lcEntropy,"base64")

loEcc = createobject("CkEcc")

// Generate a random ECDSA private key on the secp256k1 curve.
loPrivKey = loEcc.GenEccKey("secp256k1",loFortuna)
if (loEcc.LastMethodSuccess <> .T.) then
    ? loEcc.LastErrorText
    release loFortuna
    release loEcc
    return
endif

? "Successfully generated a sec256k1 key."

release loPrivKey

// Show how to compute the Keccak-256 hash in a few ways.
loSb = createobject("CkStringBuilder")
loSb.Append("hello")

? "keccak-256: " + loSb.GetHash("keccak-256","hex_lower","utf-8")

// Output:
// keccak-256: 1c8aff950685c2ed4bc3174f3472287b56d9517b9c948127319a09a7a36deac8

// To keccak-256 hash binary data
loBd = createobject("CkBinData")
loBd.AppendEncoded("00010203040506","hex")

? "keccak-256: " + loBd.GetHash("keccak-256","hex_lower")

// Output:
// keccak-256: 801560412425120fa609be232d6fa71c7f64f42aee7977267687dcc0a2f5aa63


release loFortuna
release loEcc
release loSb
release loBd