[python] Suppress InsecureRequestWarning: Unverified HTTPS request is being made in Python2.6

I am writing scripts in Python2.6 with use of pyVmomi and while using one of the connection methods:

service_instance = connect.SmartConnect(host=args.ip,
                                        user=args.user,
                                        pwd=args.password)

I get the following warning:

/usr/lib/python2.6/site-packages/requests/packages/urllib3/connectionpool.py:734: InsecureRequestWarning: Unverified HTTPS request is being made. Adding certificate verification is strongly advised. See: https://urllib3.readthedocs.org/en/latest/security.html
  InsecureRequestWarning)

What's interesting is that I do not have urllib3 installed with pip (but it's there in /usr/lib/python2.6/site-packages/requests/packages/urllib3/).

I have tried as suggested here

import urllib3
...
urllib3.disable_warnings()

but that didn't change anything.

Warning message

~/venv/lib/python3.4/site-packages/urllib3/connectionpool.py:857: InsecureRequestWarning: Unverified HTTPS request is being made. Adding certificate verification is strongly advised. See: https://urllib3.readthedocs.io/en/latest/advanced-usage.html#ssl-warnings InsecureRequestWarning)

In Debian 8 this steps works

1. In python3 code

import urllib3
urllib3.disable_warnings()

2. Install two packages on Debian

libssl1.0.0_1.0.2l-1_bpo8+1_amd64.deb

libssl-dev_1.0.2l-1_bpo8+1_amd64.deb

debian mirror

To build dependencies with new library

3. Create new venv for python project

python3 -m venv .venv
source .venv/bin/activate

Clean Install modules under python project inside virtual environment by

python3 -m pip install -e .

Per this github comment, one can disable urllib3 request warnings via requests in a 1-liner:

requests.packages.urllib3.disable_warnings()

This will suppress all warnings though, not just InsecureRequest (ie it will also suppress InsecurePlatform etc). In cases where we just want stuff to work, I find the conciseness handy.

The accepted answer doesn't work if some package vendors it's own copy of urllib3, in which case this will still work:

import warnings

warnings.filterwarnings('ignore', message='Unverified HTTPS request')

The HTTPS certificate verification security measure isn't something to be discarded light-heartedly. The Man-in-the-middle attack that it prevents safeguards you from a third party e.g. sipping a virus in or tampering with or stealing your data.
Even if you only intend to do that in a test environment, you can easily forget to undo it when moving elsewhere.

Instead, read the relevant section on the provided link and do as it says. The way specific for requests (which bundles with its own copy of urllib3), as per CA Certificates — Advanced Usage — Requests 2.8.1 documentation:

• requests ships with its own certificate bundle (but it can only be updated together with the module)
• it will use (since requests v2.4.0) the certifi package instead if it's installed
• In a test environment, you can easily slip a test certificate into certifi as per how do I update root certificates of certifi? . E.g. if you replace its bundle with just your test certificate, you will immediately see it if you forget to undo that when moving to production.

Finally, with today's government-backed global hacking operations like Tailored Access Operations and the Great Firewall of China that target network infrastructure, falling under a MITM attack is more probable than you think.

For impatient, a quick way to disable python unverified HTTPS warning:

export PYTHONWARNINGS="ignore:Unverified HTTPS request"

For Python 2.7

Add the environment variable PYTHONWARNINGS as key and the corresponding value to be ignored like:

os.environ['PYTHONWARNINGS']="ignore:Unverified HTTPS request"

I had a similar issue with PyVmomi Client. With Python Version 2.7.9, I have solved this issue with the following line of code:

default_sslContext = ssl._create_unverified_context()
self.client = \
                Client(<vcenterip>, username=<username>, password=<passwd>,
                       sslContext=default_sslContext )

Note that, for this to work, you need Python 2.7.9 atleast.

That's probably useful for someone, who uses unittest, if imported modules use request library. To suppress warnings in requests' vendored urllib3, add

warnings.filterwarnings('ignore', message='Unverified HTTPS request')

to setUp method in your testclass, i.e:

import unittest, warnings

class MyTests(unittest.TestCase):
    
    def setUp(self):
        warnings.filterwarnings('ignore', message='Unverified HTTPS request')
    
    (all test methods here)

This is the answer in 2017. urllib3 not a part of requests anymore

import urllib3
urllib3.disable_warnings(urllib3.exceptions.InsecureRequestWarning)

Suppress logs using standard python library 'logging'

Place this code on the top of your existing code

import logging
urllib3_logger = logging.getLogger('urllib3')
urllib3_logger.setLevel(logging.CRITICAL)

Why not using pyvmomi original function SmartConnectNoSSL. They added this function on June 14, 2016 and named it ConnectNoSSL, one day after they changed the name to SmartConnectNoSSL, use that instead of by passing the warning with unnecessary lines of code in your project?

Provides a standard method for connecting to a specified server without SSL verification. Useful when connecting to servers with self-signed certificates or when you wish to ignore SSL altogether

service_instance = connect.SmartConnectNoSSL(host=args.ip,
                                             user=args.user,
                                             pwd=args.password)