(Visual Basic 6.0) secp256k1 Key Generation and Keccak-256

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

Chilkat ActiveX Downloads ActiveX for 32-bit and 64-bit Windows

' 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.
Dim fortuna As New ChilkatPrng
Dim entropy As String
entropy = fortuna.GetEntropy(32,"base64")
Dim success As Long
success = fortuna.AddEntropy(entropy,"base64")

Dim ecc As New ChilkatEcc

' Generate a random ECDSA private key on the secp256k1 curve.
Dim privKey As PrivateKey
Set privKey = ecc.GenEccKey("secp256k1",fortuna)
If (ecc.LastMethodSuccess <> 1) Then
    Debug.Print ecc.LastErrorText
    Exit Sub
End If

Debug.Print "Successfully generated a sec256k1 key."

' Show how to compute the Keccak-256 hash in a few ways.
Dim sb As New ChilkatStringBuilder
success = sb.Append("hello")

Debug.Print "keccak-256: " & sb.GetHash("keccak-256","hex_lower","utf-8")

' Output:
' keccak-256: 1c8aff950685c2ed4bc3174f3472287b56d9517b9c948127319a09a7a36deac8

' To keccak-256 hash binary data
Dim bd As New ChilkatBinData
success = bd.AppendEncoded("00010203040506","hex")

Debug.Print "keccak-256: " & bd.GetHash("keccak-256","hex_lower")

' Output:
' keccak-256: 801560412425120fa609be232d6fa71c7f64f42aee7977267687dcc0a2f5aa63