Question

我正在尝试验证已签名的消息，但我不断收到错误消息；

AttributeError：'_io.BufferedReader'对象没有属性'n'

我真的不知道是什么原因导致了这个错误

首先，我对AES加密的数据进行签名，然后对它进行base64编码。然后在运行脚本时将打印出的json.dump管道传输到文件

def get_signature(message):
    h = SHA256.new(message)
    signature = pkcs1_15.new(priv_keyObj).sign(h)
    return signature

ENCODING = 'utf-8'

print(json.dumps({
    'EncryptedString':      base64.standard_b64encode(encrypted_data).decode(ENCODING),
    'SignedDataString':     base64.standard_b64encode(get_signature(encrypted_data)).decode(ENCODING),
}))

我首先将文件读取为json，然后当我验证时，我读取了base64编码的味精并开始进行b64解码；

def verify_signature(message, signature):
    h = SHA256.new(message)
    try:
        pkcs1_15.new(pub_key_new).verify(h, signature)
        print("The signature is valid.")
    except (ValueError, TypeError):
        print("The signature is not valid.")

verify_signature(base64.standard_b64decode(data['EncryptedString']), base64.standard_b64decode(data['SignedDataString']))

我试图使这个问题简单易懂-请告诉我是否需要提供更多信息。

完整的追溯是;

>Traceback (most recent call last):

>  File "C:/PATH/Scipts/crypto/decrypt.py", line 9, in <module>
    print(default_decrypt(read_json_file(filename)).decode("utf-8"))

>  File "C:\PATH\Scipts\crypto\crypt_helper_new.py", line 127, in default_decrypt
    verify_signature(base64.standard_b64decode(data['EncryptedString']),
 base64.standard_b64decode(data['SignedDataString']))
encoded msg:  <class 'str'>

>  File "C:\PATH\Scipts\crypto\crypt_helper_new.py", line 65, in verify_signature
    pkcs1_15.new(pub_key_new).verify(h, signature)
message:  b'S\xacU\x14\xb2E\xec\x08\xc3\x83\x18\x8ey\x98\x069'

>  File "C:\PATH\AppData\Local\Programs\Python\Python36\lib\site-packages\Crypto\Signature\pkcs1_15.py", line 106, in verify
    modBits = Crypto.Util.number.size(self._key.n)

> AttributeError: '_io.BufferedReader' object has no attribute 'n'

Answer 1

您不能将缓冲区直接传递给该函数。您应该从文件中读取字节以创建密钥对象：

pub_key_new = RSA.import_key(open('foo.pub').read())

self._key（即pub_key_new）的类型应为：

<class 'Crypto.PublicKey.RSA.RsaKey'>

验证时PyCryptodome-AttributeError：“ _ io.BufferedReader”对象没有属性“ n”

1 个答案: