utils.py 文件源码

def sign_dict(dict_, private_key):
    """Serializes a dict to JSON and sign it using RSA."""
    try:
        with open(private_key) as fp:
            key = RSA.importKey(fp.read())
    except (FileNotFoundError, ValueError, IndexError, TypeError):
        raise ValueError('Invalid private key file.')

    signer = PKCS1_v1_5.new(key)

    # encodes message
    message = SHA256.new(json.dumps(dict_, sort_keys=True).encode())

    # sign
    signature = signer.sign(message)
    return base64.b64encode(signature).decode()