Visual FoxPro

secp256k1 Key Generation and Keccak-256

See more ECC Examples

Starting in v11.0.0, Chilkat supports both secp256k1 key generation and Keccak-256 directly. These algorithms are typically used for Bitcoin and Ethereum. Visual FoxPro

LOCAL lnSuccess
LOCAL loFortuna
LOCAL lcEntropy
LOCAL loEcc
LOCAL loPrivKey
LOCAL loSb
LOCAL loBd

lnSuccess = 0

* 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('Chilkat.Prng')
lcEntropy = loFortuna.GetEntropy(32,"base64")
lnSuccess = loFortuna.AddEntropy(lcEntropy,"base64")

loEcc = CreateObject('Chilkat.Ecc')

* Generate a random ECDSA private key on the secp256k1 curve.
loPrivKey = CreateObject('Chilkat.PrivateKey')
lnSuccess = loEcc.GenKey("secp256k1",loFortuna,loPrivKey)
IF (lnSuccess = 0) THEN
    ? loEcc.LastErrorText
    RELEASE loFortuna
    RELEASE loEcc
    RELEASE loPrivKey
    CANCEL
ENDIF

? "Successfully generated a sec256k1 key."

* Show how to compute the Keccak-256 hash in a few ways.
loSb = CreateObject('Chilkat.StringBuilder')
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('Chilkat.BinData')
loBd.AppendEncoded("00010203040506","hex")

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

* Output:
* keccak-256: 801560412425120fa609be232d6fa71c7f64f42aee7977267687dcc0a2f5aa63

RELEASE loFortuna
RELEASE loEcc
RELEASE loPrivKey
RELEASE loSb
RELEASE loBd