bitcoinlib 使用 python 签署原始文本消息

Question

我正在尝试使用 Python 库 bitcoinlib 签署原始消息，例如“Hello World”。目标是为可验证的消息生成 Base64 编码的签名。然而，bitcoinlib 似乎并没有提供直接签署消息的简单方法。

这是我尝试过的：

使用bitcoinlib.keys.Key：我尝试使用密钥对象进行签名，但它不直接支持对任意消息进行签名。 使用bitcoinlib.transactions.Transaction：此类设计用于签署比特币交易，但它不支持签署原始消息。

问题：

Transaction.inputs_add() 不是有效的方法。 Transaction.sign() 不接受消息作为参数。 看来 bitcoinlib 主要是为处理交易而不是任意消息而设计的。 预期行为：我想对“Hello World”之类的原始消息进行签名，并使用 bitcoinlib 获得有效的 base64 编码签名。有没有更好的方法可以使用 bitcoinlib 来实现此目的，或者我是否需要不同的库？

附加信息：

Python版本：3.11 bitcoinlib 版本：0.6.0

from bitcoinlib.keys import Key
from bitcoinlib.transactions import Transaction

class BitcoinClient:
    def __init__(self, private_key_wif: str) -> None:
        """
        Initialize the BitcoinClient with a WIF private key.

        :param private_key_wif: The private key in Wallet Import Format (WIF).
        """
        self.key = Key(import_key=private_key_wif)
        self.address = self.key.address()

    def get_address(self) -> str:
        """
        Get the Bitcoin address associated with the private key.

        :return: Bitcoin address as a string.
        """
        return self.address

    def sign_message(self, message: str) -> str:
        """
        Sign a message using the private key.

        :param message: The message to be signed.
        :return: The signature as a base64-encoded string.
        """
        tx = Transaction(network=self.key.network)
        tx.inputs_add(self.key.address())
        signature = tx.sign(self.key, message=message)
        return signature

    def verify_message(self, message: str, signature: str) -> bool:
        """
        Verify a signed message.

        :param message: The original message.
        :param signature: The base64-encoded signature to verify.
        :return: True if the signature is valid, False otherwise.
        """
        tx = Transaction(network=self.key.network)
        return tx.verify_message(self.key.address(), message=message, signature=signature)

if __name__ == "__main__":
    # Expected address and signature for testing
    address_from_priv = ''
    # Signed message type which i should see
    signed = 'AUCozKGE8DkRwCIKgJdzwIY6nQ4lYkUlFnQqry5sDaKa9rHrpIUoIyD9I+nkRA0tCf1nwlfCeqUmMl6aSDBaLwn6'

    # Your WIF private key and message
    private_key_wif = ""
    message = "Hello world!"

    # Initialize the BitcoinClient
    try:
        signer = BitcoinClient(private_key_wif)

        # Sign the message
        signature = signer.sign_message(message)

        # Get the Bitcoin address
        address = signer.get_address()

        # Verify the signature
        is_valid = signer.verify_message(message, signature)

        # Output the results
        print(f"Bitcoin Address: {address}")
        print(f"Signature: {signature}")
        print(f"Is signature valid: {is_valid}")
        print(f"Is signature matching expected: {signature == signed}")
        print(f"Is address matching expected: {address == address_from_priv}")
    except ValueError as e:
        print(f"Error: {e}")

Answer 1

bitcoinlib

用于签署任意消息，您将不得不使用不同的库。

from bitcoinlib.keys import Key
from bitcoinlib.transactions import Transaction
from hashlib import sha256
import base64


class BitcoinClient:
    def __init__(self, private_key_wif: str) -> None:
        """
        Initialize the BitcoinClient with a WIF private key.

        :param private_key_wif: The private key in Wallet Import Format (WIF).
        """
        self.key = Key(import_key=private_key_wif)
        self.address = self.key.address()

    def get_address(self) -> str:
        """
        Get the Bitcoin address associated with the private key.

        :return: Bitcoin address as a string.
        """
        return self.address

    def sign_message(self, message: str) -> str:
        """
        Sign a message using the private key.

        :param message: The message to be signed.
        :return: The signature as a base64-encoded string.
        """
        # Hash the message using SHA-256
        message_hash = sha256(message.encode()).digest()

        # Sign the hashed message
        signature = self.key.sign(message_hash)

        # Encode the signature in base64
        return base64.b64encode(signature).decode()

    def verify_message(self, message: str, signature: str) -> bool:
        """
        Verify a signed message.

        :param message: The original message.
        :param signature: The base64-encoded signature to verify.
        :return: True if the signature is valid, False otherwise.
        """
        # Hash the message using SHA-256
        message_hash = sha256(message.encode()).digest()

        # Decode the signature from base64
        signature_bytes = base64.b64decode(signature)

        # Verify the signature against the hashed message
        return self.key.verify(signature_bytes, message_hash)


if __name__ == "__main__":
    # Expected address and signature for testing
    address_from_priv = ''
    # Signed message type which I should see
    signed = 'AUCozKGE8DkRwCIKgJdzwIY6nQ4lYkUlFnQqry5sDaKa9rHrpIUoIyD9I+nkRA0tCf1nwlfCeqUmMl6aSDBaLwn6'

    # Your WIF private key and message
    private_key_wif = ""
    message = "Hello world!"

    # Initialize the BitcoinClient
    try:
        signer = BitcoinClient(private_key_wif)

        # Sign the message
        signature = signer.sign_message(message)

        # Get the Bitcoin address
        address = signer.get_address()

        # Verify the signature
        is_valid = signer.verify_message(message, signature)

        # Output the results
        print(f"Bitcoin Address: {address}")
        print(f"Signature: {signature}")
        print(f"Is signature valid: {is_valid}")
        print(f"Is signature matching expected: {signature == signed}")
        print(f"Is address matching expected: {address == address_from_priv}")
    except ValueError as e:
        print(f"Error: {e}")

另外，你的代码并不愚蠢：D