python httplib2证书验证失败

Question

我已经尽了我所能让这个工作。。。

我正在为一个基于python的任务程序（称为GTG）开发一个插件。我在Opensuse Linux上运行Gnome。

代码（Python2.7）：

def initialize(self):
    """
    Intialize backend: try to authenticate. If it fails, request an authorization.
    """
    super(Backend, self).initialize()
    path = os.path.join(CoreConfig().get_data_dir(), 'backends/gtask', 'storage_file-%s' % self.get_id())
    # Try to create leading directories that path
    path_dir = os.path.dirname(path)
    if not os.path.isdir(path_dir):
        os.makedirs(path_dir)

    self.storage = Storage(path)
    self.authenticate()

def authenticate(self):
    """ Try to authenticate by already existing credences or request an authorization """
    self.authenticated = False

    credentials = self.storage.get()
    if credentials is None or credentials.invalid == True:
        self.request_authorization()
    else:
        self.apply_credentials(credentials)
        # Request periodic import, avoid waiting a long time
        # self.start_get_tasks()

def apply_credentials(self, credentials):
    """ Finish authentication or request for an authorization by applying the credentials """


    http = httplib2.Http(ca_certs = '/etc/ssl/certs/ca_certs.pem', disable_ssl_certificate_validation=True)

    http = credentials.authorize(http)

    # Build a service object for interacting with the API.
    self.service = build_service(serviceName='tasks', version='v1', http=http, developerKey='AIzaSyAmUlk8_iv-rYDEcJ2NyeC_KVPNkrsGcqU')
    # self.service = build_service(serviceName='tasks', version='v1')
    self.authenticated = True

def _authorization_step2(self, code):
    credentials = self.flow.step2_exchange(code)
    # credential = self.flow.step2_exchange(code)

    self.storage.put(credentials)
    credentials.set_store(self.storage)

    return credentials

def request_authorization(self):
    """ Make the first step of authorization and open URL for allowing the access """

    self.flow = OAuth2WebServerFlow(client_id=self.CLIENT_ID,
        client_secret=self.CLIENT_SECRET,
        scope='https://www.googleapis.com/auth/tasks',
        redirect_uri='http://localhost:8080',
        user_agent='GTG')


    oauth_callback = 'oob'
    auth_uri = self.flow.step1_get_authorize_url(oauth_callback)
    # credentials = self.flow.step2_exchange(code)



    # url = self.flow.step1_get_authorize_url(oauth_callback)
    browser_thread = threading.Thread(target=lambda: webbrowser.open_new(auth_uri))
    browser_thread.daemon = True
    browser_thread.start()

    # Request the code from user
    BackendSignals().interaction_requested(self.get_id(), _(
        "You need to <b>authorize GTG</b> to access your tasks on <b>Google</b>.\n"
        "<b>Check your browser</b>, and follow the steps there.\n"
        "When you are done, press 'Continue'."),
        BackendSignals().INTERACTION_TEXT,
        "on_authentication_step")


def on_authentication_step(self, step_type="", code=""):

    if step_type == "get_ui_dialog_text":
        return _("Code request"), _("Paste the code Google has given you"
                "here")
    elif step_type == "set_text":
        try:

            credentials = self._authorization_step2(code)
        except FlowExchangeError, e:
            # Show an error to user and end
            self.quit(disable = True)
            BackendSignals().backend_failed(self.get_id(), 
                        BackendSignals.ERRNO_AUTHENTICATION)
            return

        self.apply_credentials(credentials)
        # Request periodic import, avoid waiting a long time
        self.start_get_tasks()

浏览器窗口打开，我看到一个来自谷歌的代码。程序打开一个小窗口，我可以在其中输入来自Google的代码。当这种情况发生时，我在控制台中得到：

 No handlers could be found for logger "oauth2client.util"
Created new window in existing browser session.
[522:549:0108/063825:ERROR:nss_util.cc(821)] After loading Root Certs, loaded==false: NSS error code: -8018

但是SSL图标在Chrome中是绿色的。。。

当我提交代码时，我得到：

    Exception in thread Thread-10:
Traceback (most recent call last):
  File "/usr/lib64/python2.7/threading.py", line 810, in __bootstrap_inner
    self.run()
  File "/usr/lib64/python2.7/threading.py", line 763, in run
    self.__target(*self.__args, **self.__kwargs)
  File "/usr/lib/python2.7/site-packages/GTG/backends/backend_gtask.py", line 204, in on_authentication_step
    credentials = self._authorization_step2(code)
  File "/usr/lib/python2.7/site-packages/GTG/backends/backend_gtask.py", line 151, in _authorization_step2
    credentials = self.flow.step2_exchange(code)
  File "/usr/lib/python2.7/site-packages/oauth2client/util.py", line 132, in positional_wrapper
    return wrapped(*args, **kwargs)
  File "/usr/lib/python2.7/site-packages/oauth2client/client.py", line 1283, in step2_exchange
    headers=headers)
  File "/usr/lib/python2.7/site-packages/httplib2/__init__.py", line 1586, in request
    (response, content) = self._request(conn, authority, uri, request_uri, method, body, headers, redirections, cachekey)
  File "/usr/lib/python2.7/site-packages/httplib2/__init__.py", line 1328, in _request
    (response, content) = self._conn_request(conn, request_uri, method, body, headers)
  File "/usr/lib/python2.7/site-packages/httplib2/__init__.py", line 1250, in _conn_request
    conn.connect()
  File "/usr/lib/python2.7/site-packages/httplib2/__init__.py", line 1037, in connect
    raise SSLHandshakeError(e)
SSLHandshakeError: [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:581)

文件名为backend_gtask.py。。。

我已尝试导入此处所述的证书：How to update cacerts.txt of httplib2 for Github?

我已经试过禁用验证（httplib2.Http（disable_ssl_certificate_validation=True））如网络上所述

我已经更新了python包（这似乎让事情变得更糟）

我在/etc/ssl之间来回复制了ca_certs.pem。。。和/usr/lib/python2.7/。。。

当我在浏览器中访问auth页面时，它显示证书已验证。。。

我还能查什么？

短测试代码：

from oauth2client.client import OAuth2WebServerFlow
from oauth2client.tools import run
from oauth2client.file import Storage

CLIENT_ID = 'id'
CLIENT_SECRET = 'secret'

flow = OAuth2WebServerFlow(client_id=CLIENT_ID,
                           client_secret=CLIENT_SECRET,
                           scope='https://www.googleapis.com/auth/tasks',
                           redirect_uri='http://localhost:8080')

storage = Storage('creds.data')

credentials = run(flow, storage)

print "access_token: %s" % credentials.access_token

在这里发现：https://github.com/burnash/gspread/wiki/How-to-get-OAuth-access-token-in-console%3F

Answer 1

好的。。。 非常感谢Steffen Ullrich。

httplib2 0.9版尝试使用系统证书，而不是以前随附的certs.txt文件。它还执行验证。

httplib2可以接受一些有用的参数——特别是ca证书。使用它指向ssl安装中的实际*.pem文件。我不能是一个文件夹，必须是一个真正的文件。

我在插件的初始化中使用了以下内容：

self.http = httplib2.Http(ca_certs = '/etc/ssl/ca-bundle.pem')

然后，对于随后对httplib或google客户端库的所有调用，我将预先构建的http对象作为如下参数传递：

credentials = self.flow.step2_exchange(code, self.http)

self.http = credentials.authorize(self.http)

现在ssl连接与新的httplib2一起工作。。。

我最终要确保插件可以在任何系统上找到证书，但至少我知道问题出在哪里。

再次感谢Steffen Ullrich带我走过这段路。