Google服务器到服务器应用程序的pyjwt无效JWT(Invalid JWT with pyjwt for Google Server to Server Applications)

在使用Python Oauthlib未能使用Python Oauthlib对服务器应用程序进行身份验证之后，我现在尝试使用pyjwt直接生成jwt，然后按照Google文档中的说明使用curl对其进行测试，但由于我现在收到： 无效的JWT：令牌必须是一个短期令牌，并且在合理的时间范围内 。

安装pyjwt后Python 3中的代码：

>>> from datetime import datetime, timedelta >>> import json >>> import jwt >>> json_file = json.load(open("google-project-credentials.json")) >>> dt_now = datetime.datetime.utcnow() >>> payload = { 'iss' : json_file['client_email'], 'scope' : 'https://www.googleapis.com/auth/tasks', 'aud' : 'https://www.googleapis.com/oauth2/v4/token', 'exp' : int((dt_now + datetime.timedelta(hours=1)).timestamp()), 'iat': int(dt_now.timestamp()) } >>> jwt.encode(payload, json_file['private_key'], algorithm='RS256') b'PYJWT_RESULT_HERE'

然后，如Google文档中所述，我在bash中运行curl并粘贴上一个结果：

$ curl -d 'grant_type=urn%3Aietf%3Aparams%3Aoauth%3Agrant-type%3Ajwt-bearer&assertion=PYJWT_RESULT_HERE' https://www.googleapis.com/oauth2/v4/token

然后我收到以下错误：

{ "error": "invalid_grant", "error_description": "Invalid JWT: Token must be a short-lived token and in a reasonable timeframe" }

我究竟做错了什么？

谢谢！

After failing to authenticate for Google Server to Server Applications using Python Oauthlib, I am now trying to generate directly the jwt with pyjwt then test it with curl as stated in Google documentation, but it does not work either since I now receive: Invalid JWT: Token must be a short-lived token and in a reasonable timeframe.

The code in Python 3 after installing pyjwt:

>>> from datetime import datetime, timedelta >>> import json >>> import jwt >>> json_file = json.load(open("google-project-credentials.json")) >>> dt_now = datetime.datetime.utcnow() >>> payload = { 'iss' : json_file['client_email'], 'scope' : 'https://www.googleapis.com/auth/tasks', 'aud' : 'https://www.googleapis.com/oauth2/v4/token', 'exp' : int((dt_now + datetime.timedelta(hours=1)).timestamp()), 'iat': int(dt_now.timestamp()) } >>> jwt.encode(payload, json_file['private_key'], algorithm='RS256') b'PYJWT_RESULT_HERE'

Then, as stated in Google documentation, I run curl in bash and paste the previous result:

$ curl -d 'grant_type=urn%3Aietf%3Aparams%3Aoauth%3Agrant-type%3Ajwt-bearer&assertion=PYJWT_RESULT_HERE' https://www.googleapis.com/oauth2/v4/token

Then I receive the following error:

{ "error": "invalid_grant", "error_description": "Invalid JWT: Token must be a short-lived token and in a reasonable timeframe" }

What am I doing wrong?

Thanks!

最满意答案

实际上，如错误消息中所述，问题出现在错误生成的时代（我还不完全理解为什么）：

>>> from datetime import datetime >>> from calendar import timegm >>> import json >>> import jwt >>> json_file = json.load(open("google-project-credentials.json")) >>> payload = { 'iss' : json_file['client_email'], 'scope' : 'https://www.googleapis.com/auth/tasks', 'aud' : 'https://www.googleapis.com/oauth2/v4/token', 'exp' : timegm(datetime.utcnow().utctimetuple()) + 600, 'iat' : timegm(datetime.utcnow().utctimetuple()) } >>> jwt.encode(payload, json_file['private_key'], algorithm='RS256') b'PYJWT_RESULT_HERE'

然后在Bash控制台中：

$ curl -d 'grant_type=urn%3Aietf%3Aparams%3Aoauth%3Agrant-type%3Ajwt-bearer&assertion=PYJWT_RESULT_HERE' https://www.googleapis.com/oauth2/v4/token { "access_token": "GOOGLE_ACCESS_TOKEN_YEAH", "token_type": "Bearer", "expires_in": 3600 }

我真的很惊讶没有得到更多的帮助，因为我认为Google会参与其中;-(在开源项目中，支持实际上更好！

Actually, as stated in the error message, the problem was in the epoch that was incorrectly generated (I don't completely understand why yet):

>>> from datetime import datetime >>> from calendar import timegm >>> import json >>> import jwt >>> json_file = json.load(open("google-project-credentials.json")) >>> payload = { 'iss' : json_file['client_email'], 'scope' : 'https://www.googleapis.com/auth/tasks', 'aud' : 'https://www.googleapis.com/oauth2/v4/token', 'exp' : timegm(datetime.utcnow().utctimetuple()) + 600, 'iat' : timegm(datetime.utcnow().utctimetuple()) } >>> jwt.encode(payload, json_file['private_key'], algorithm='RS256') b'PYJWT_RESULT_HERE'

Then in a Bash console:

$ curl -d 'grant_type=urn%3Aietf%3Aparams%3Aoauth%3Agrant-type%3Ajwt-bearer&assertion=PYJWT_RESULT_HERE' https://www.googleapis.com/oauth2/v4/token { "access_token": "GOOGLE_ACCESS_TOKEN_YEAH", "token_type": "Bearer", "expires_in": 3600 }

I was actually surprised not to receive more help on that matter since I thought Google would be involved ;-( On open-source project, the support is actually better!

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