python - 无法在 iconomi 的 python 中使用 sha512 签署消息

Question

我正在尝试通过 API 发送经过身份验证的消息 iconomi.com 。 我习惯在处理其他交换 API 时对消息进行签名，但无法使用此特定 API 进行身份验证。

我读了official documentation身份验证:

You generate the ICN-SIGN header by creating a sha512 HMAC using the base64-decoded secret key on the prehash string timestamp + method + requestPath + body (where + represents string concatenation) and base64-encode the output, where:

the timestamp value is the same as the ICN-TIMESTAMP header. the body is the request body string or omitted if there is no request body (typically for GET requests). method must always be in upper case

Example: base64_encode(HMAC_SHA512(secret_key, timestamp + upper_case(method) + requestPath + body))

我还在official github上找到了一个java客户端示例。 ，请参阅下面的 java 签名生成:

private String generateServerDigest(String method, String uri, long timestamp, String body) {
    //return timestamp + request.getMethodValue() + uri + body;
    String checkDigestString = timestamp + method + uri + body;//  "GET+/v1/daa-list+123123123"; //timestamp in epoch milliseconds

    // hash server composited digest with algorithm and apikeys secret
    SecretKeySpec signingKey = new SecretKeySpec(apiSecret.getBytes(), "HmacSHA512");
    Mac mac;
    try {
        mac = Mac.getInstance(signingKey.getAlgorithm());
        mac.init(signingKey);
    } catch (NoSuchAlgorithmException | InvalidKeyException e) {
        log.warn("Could not ={}", signingKey.getAlgorithm());
        return null;
    }

    return Base64.getEncoder().encodeToString(mac.doFinal(checkDigestString.getBytes()));
}

请注意，checkDigestString代码timestamp + method + uri + body和注释GET+/v1/daa-list+123123123在官方文档中已经不同.

---

这是我的 python 实现尝试:

def sign(timestamp,method,requestPath,body):
    global api_secret
    base64_decoded_secret_key = base64.b64decode(api_secret)
    content_to_hash = (str(timestamp) + method.upper() + requestPath + body).encode('utf-8')
    sign_digest = hmac.new(base64_decoded_secret_key, content_to_hash , hashlib.sha512).digest()    
    return base64.b64encode(sign_digest).decode('utf-8')

当我使用 requestPath = "/v1/user/balance" (需要进行身份验证)尝试此签名方法时，它失败而没有错误......

---

是否有同时使用 java 和 python 的人可以帮助我将此签名方法转换为 python ？

Answer 1

此代码适用于 GET:

import time,requests
import hashlib,hmac,base64

api_key = "my api key"
api_secret = "my api secret"

defaut_encoding = "utf8"

uri = "https://api.iconomi.com"
requestPath = "/v1/user/balance"
api_url_target = uri+requestPath # https://api.iconomi.com/v1/user/balance
method="GET"
body=""
icn_timestamp = int(1000.*time.time())

message = (str(icn_timestamp) + method.upper() + requestPath + body).encode(defaut_encoding)
signature_digest = hmac.new(api_secret.encode(defaut_encoding), message, hashlib.sha512).digest() #here digest is byte
b64_signature_digest= base64.b64encode(signature_digest).decode(defaut_encoding)

headers_sign= {
    "ICN-API-KEY":api_key,
    "ICN-SIGN":b64_signature_digest,
    "ICN-TIMESTAMP":str(icn_timestamp)
}

s=requests.session()
res = s.get(api_url_target,headers=headers_sign,timeout=3, verify=True).content
print (res)

更新@Karl 评论，此代码适用于 POST:

import time,requests
import hashlib,hmac,base64,json

api_key = "my api key"
api_secret = "my api secret"
ticker = "my ticker strategy"


defaut_encoding = "utf8"

uri = "https://api.iconomi.com"
requestPath = "/v1/strategies/"+ticker+"/structure"
api_url_target = uri+requestPath # https://api.iconomi.com/v1/strategies/{my ticker strategy}/structure
method="POST"
body="{'ticker': ticker, 'values': [{'rebalancedWeight': 1., 'targetWeight':1., 'assetTicker': 'XMR', 'assetName': 'Monero', 'assetCategory': 'Privacy'}]}"
icn_timestamp = int(1000.*time.time())

message = (str(icn_timestamp) + method.upper() + requestPath + body).encode(defaut_encoding)
signature_digest = hmac.new(api_secret.encode(defaut_encoding), message, hashlib.sha512).digest() #here digest is byte
b64_signature_digest= base64.b64encode(signature_digest).decode(defaut_encoding)

headers_sign= {
    "ICN-API-KEY":api_key,
    "ICN-SIGN":b64_signature_digest,
    "ICN-TIMESTAMP":str(icn_timestamp)
}

s=requests.session()
res = s.post(api_url_target,headers=headers_sign,json = json.loads(body), timeout=3, verify=True).content
print (res)