py-ecc

import os from py_ecc.secp256k1 import privtopub, ecsign, ecrecover, N # 1. Generate a private key # In a real application, use a cryptographically secure random source (e.g., from a KDF or secure RNG) privkey = int(os.urandom(32).hex(), 16) % N print(f"Private Key: {hex(privkey)}") # 2. Derive the public key pubkey = privtopub(privkey) print(f"Public Key (uncompressed, X, Y tuple): {pubkey}") # 3. Create a message hash (must be 32 bytes) msg_hash = int.from_bytes(os.urandom(32), 'big') print(f"Message Hash: {hex(msg_hash)}") # 4. Sign the message v, r, s = ecsign(msg_hash, privkey) print(f"Signature: v={v}, r={hex(r)}, s={hex(s)}") # 5. Recover the public key from the signature recovered_pubkey = ecrecover(msg_hash, v, r, s) print(f"Recovered Public Key: {recovered_pubkey}") # 6. Verify the signature assert recovered_pubkey == pubkey, "Signature verification failed!" print("Signature verification successful!")