starkbank-ecdsa

import hashlib from starkbank_ecdsa import PrivateKey, PublicKey, Ecdsa # 1. Generate a new private key private_key = PrivateKey.generate() print(f"Private Key: {private_key.toPem().decode().strip()}") # 2. Get the corresponding public key public_key = private_key.public_key() print(f"Public Key: {public_key.toPem().decode().strip()}") # 3. Data to sign (must be a 32-byte hash) message = "This is a test message for ECDSA signing and verification." message_hash = hashlib.sha256(message.encode()).digest() print(f"Message hash (bytes): {message_hash.hex()}") # 4. Sign the message hash signature = Ecdsa.sign(message_hash, private_key) print(f"Signature (hex): {signature.toHex()}") # 5. Verify the signature is_valid = Ecdsa.verify(message_hash, signature, public_key) print(f"Signature is valid: {is_valid}") # Example of invalid signature (tampered message) invalid_message_hash = hashlib.sha256(b"tampered message").digest() is_invalid = Ecdsa.verify(invalid_message_hash, signature, public_key) print(f"Signature with tampered message is valid: {is_invalid}")