VB.NET

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. VB.NET

Dim success As Boolean = False

' 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 Chilkat.Prng
Dim entropy As String = fortuna.GetEntropy(32,"base64")
success = fortuna.AddEntropy(entropy,"base64")

Dim ecc As New Chilkat.Ecc

' Generate a random ECDSA private key on the secp256k1 curve.
Dim privKey As New Chilkat.PrivateKey
success = ecc.GenKey("secp256k1",fortuna,privKey)
If (success = False) Then
    Debug.WriteLine(ecc.LastErrorText)
    Exit Sub
End If


Debug.WriteLine("Successfully generated a sec256k1 key.")

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

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

' Output:
' keccak-256: 1c8aff950685c2ed4bc3174f3472287b56d9517b9c948127319a09a7a36deac8

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

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

' Output:
' keccak-256: 801560412425120fa609be232d6fa71c7f64f42aee7977267687dcc0a2f5aa63