Huobi REST API - signing requests - Verification failure

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I have problem with Huobi (cryptoexchange) REST API request-signing. Rules are clear (e.g. here). Example for "v1/account/acounts" - GET with no params:

  1. URL params: AccessKeyId=dbye2sf5t7-d5829459-bf3aee27-67f62&SignatureMethod=HmacSHA256&SignatureVersion=2&Timestamp=2020-11-11T12%3A17%3A57

  2. Pre-signing text: GET\napi.huobi.pro\n/v1/account/accounts\nAccessKeyId=dbye2sf5t7-d5829459-bf3aee27-67f62&SignatureMethod=HmacSHA256&SignatureVersion=2&Timestamp=2020-11-11T12%3A17%3A57

  3. Hmac SHA256-Signature of Pre-signing text with private key (verified here): auZl70i2qsUb7+U9yYEEY1bwzLypWIM7qF1pBAJcvfc=

  4. URL to GET: https://api.huobi.pro/v1/account/accounts?AccessKeyId=dbye2sf5t7-d5829459-bf3aee27-67f62&SignatureMethod=HmacSHA256&SignatureVersion=2&Timestamp=2020-11-11T12%3A17%3A57&Signature=auZl70i2qsUb7%2BU9yYEEY1bwzLypWIM7qF1pBAJcvfc%3D

And the response is:

{"status":"error","err-code":"api-signature-not-valid","err-msg":"Signature not valid: Verification failure [校验失败]","data":null}

What I'm making wrong? I have searched thru many code-examples and no error found...

hmac sha256 signing rest
1 Answers

I had this problem with the same endpoint. I'm not sure what code you're using to sign your requests. Here's mine:

class HuobiAuth(requests.auth.AuthBase):
    def __init__(self, api_key: str, secret_key: str) -> None:
        self.api_key: str = api_key
        self.secret_key: str = secret_key

    @staticmethod
    def create_sign(p_params: Dict, method: str, host_url: str, request_path: str, secret_key: str):
        sorted_params = sorted(p_params.items(), key=lambda d: d[0], reverse=False)
        # encode_params = urllib.urlencode(sorted_params)
        encode_params = urllib.parse.urlencode(sorted_params)
        payload = [method, host_url, request_path, encode_params]
        payload = '\n'.join(payload)
        payload = payload.encode(encoding='UTF8')
        secret_key = secret_key.encode(encoding='UTF8')
        digest = hmac.new(secret_key, payload, digestmod=hashlib.sha256).digest()
        signature = base64.b64encode(digest)
        signature = signature.decode()
        return signature

    def __call__(self, request: requests.PreparedRequest) -> requests.PreparedRequest:
        timestamp = datetime.datetime.utcnow().strftime('%Y-%m-%dT%H:%M:%S')
        params_to_sign = {'AccessKeyId': self.api_key,
                          'SignatureMethod': 'HmacSHA256',
                          'SignatureVersion': '2',
                          'Timestamp': timestamp}
        host_name = urllib.parse.urlparse(request.url).hostname.lower()
        params_to_sign['Signature'] = self.create_sign(params_to_sign, request.method, host_name, request.path_url, self.secret_key)
        request.url += '?' + urllib.parse.urlencode(params_to_sign)
        return request

My original problem was that instead of using request.method I had a hardcoded "POST", which I must have copied from the original source.

Example usage:

requests.post(url, json=your_data, auth=HuobiAuth(key, secret))
user_1636680
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