How do I disable the security certificate check in Python requests

Question

I am using

import requests
requests.post(url='https://foo.example', data={'bar':'baz'})

but I get a request.exceptions.SSLError. The website has an expired certficate, but I am not sending sensitive data, so it doesn't matter to me. I would imagine there is an argument like 'verifiy=False' that I could use, but I can't seem to find it.

Answer 1

From the documentation:

requests can also ignore verifying the SSL certificate if you set verify to False.

>>> requests.get('https://kennethreitz.com', verify=False)
<Response [200]>

If you're using a third-party module and want to disable the checks, here's a context manager that monkey patches requests and changes it so that verify=False is the default and suppresses the warning.

import warnings
import contextlib

import requests
from urllib3.exceptions import InsecureRequestWarning

old_merge_environment_settings = requests.Session.merge_environment_settings

@contextlib.contextmanager
def no_ssl_verification():
    opened_adapters = set()

    def merge_environment_settings(self, url, proxies, stream, verify, cert):
        # Verification happens only once per connection so we need to close
        # all the opened adapters once we're done. Otherwise, the effects of
        # verify=False persist beyond the end of this context manager.
        opened_adapters.add(self.get_adapter(url))

        settings = old_merge_environment_settings(self, url, proxies, stream, verify, cert)
        settings['verify'] = False

        return settings

    requests.Session.merge_environment_settings = merge_environment_settings

    try:
        with warnings.catch_warnings():
            warnings.simplefilter('ignore', InsecureRequestWarning)
            yield
    finally:
        requests.Session.merge_environment_settings = old_merge_environment_settings

        for adapter in opened_adapters:
            try:
                adapter.close()
            except:
                pass

Here's how you use it:

with no_ssl_verification():
    requests.get('https://wrong.host.badssl.example/')
    print('It works')

    requests.get('https://wrong.host.badssl.example/', verify=True)
    print('Even if you try to force it to')

requests.get('https://wrong.host.badssl.example/', verify=False)
print('It resets back')

session = requests.Session()
session.verify = True

with no_ssl_verification():
    session.get('https://wrong.host.badssl.example/', verify=True)
    print('Works even here')

try:
    requests.get('https://wrong.host.badssl.example/')
except requests.exceptions.SSLError:
    print('It breaks')

try:
    session.get('https://wrong.host.badssl.example/')
except requests.exceptions.SSLError:
    print('It breaks here again')

Note that this code closes all open adapters that handled a patched request once you leave the context manager. This is because requests maintains a per-session connection pool and certificate validation happens only once per connection so unexpected things like this will happen:

>>> import requests
>>> session = requests.Session()
>>> session.get('https://wrong.host.badssl.example/', verify=False)
/usr/local/lib/python3.7/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)
<Response [200]>
>>> session.get('https://wrong.host.badssl.example/', verify=True)
/usr/local/lib/python3.7/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)
<Response [200]>

Answer 2

Use requests.packages.urllib3.disable_warnings() and verify=False on requests methods.

Note that you can either import urllib3 directly or import it from requests.packages.urllib3 to be use to use the same version as the one in requests.

import requests

import urllib3  
# or if this does not work with the previous import:
# from requests.packages import urllib3  

# Suppress only the single warning from urllib3.
urllib3.disable_warnings(category=urllib3.exceptions.InsecureRequestWarning)

# Set `verify=False` on `requests.post`.
requests.post(url='https://example.com', data={'bar':'baz'}, verify=False)

And if you want to suppress the warning from urllib3 only when used by the requests methods, you can use it in a context manager:

with urllib3.warnings.catch_warnings():
   urllib3.disable_warnings(urllib3.exceptions.InsecureRequestWarning)

   requests.post(url='https://example.com', data={'bar':'baz'}, verify=False)

Answer 3

To add to Blender's answer, you can disable SSL certificate validation for all requests using Session.verify = False

import requests

session = requests.Session()
session.verify = False
session.post(url='https://example.com', data={'bar':'baz'})

Note that urllib3, (which Requests uses), strongly discourages making unverified HTTPS requests and will raise an InsecureRequestWarning.

Answer 4

Also can be done with a environment variable:

export CURL_CA_BUNDLE=""

Answer 5

If you are writing a scraper and really don't care about the SSL certificate you can set it global:

import ssl

ssl._create_default_https_context = ssl._create_unverified_context

DO NOT USE IN PRODUCTION

edit, comment from @Misty

Not working. Requests now uses urllib3, which create its own SSLContext. You can override cert_reqs instead

ssl.SSLContext.verify_mode = property(lambda self: ssl.CERT_NONE, lambda self, newval: None)

Answer 6

If you want to send exactly post request with verify=False option, fastest way is to use this code:

import requests

requests.api.request('post', url, data={'bar':'baz'}, json=None, verify=False)

Answer 7

What has worked for me Due verify=False Bug

Due to a bug on session.verify=False that makes urllib* ignore
that when a environment variable (CURL_CA_BUNDLE) is set. So we set it to nothing.

import requests, os
session = requests.Session()
session.verify = False
session.trust_env = False
os.environ['CURL_CA_BUNDLE']="" # or whaever other is interfering with 
session.post(url='https://example.com', data={'bar':'baz'})

Not sure I need trust_env

Answer 8

You can disable ssl verification globally and also disable the warnings using the below approach in the entry file of your code

import requests

# disable ssl warning
requests.packages.urllib3.disable_warnings()

# override the methods which you use
requests.post = lambda url, **kwargs: requests.request(
    method="POST", url=url, verify=False, **kwargs
)

requests.get = lambda url, **kwargs: requests.request(
    method="GET", url=url, verify=False, **kwargs
)

Answer 9

Bit late to the party.

In python 3.8 and requests (2.28.2) it is possible to disable those warnings on urllib3(https://urllib3.readthedocs.io/en/1.26.x/advanced-usage.html#ssl-warnings) via requests i.e.

import requests
requests.urllib3.disable_warnings()

Answer 10

python 3.6+

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

Answer 11

If you work with websockets package then ssl package provides ssl._create_unverified_context() method, that disables certificates verification. I had to use it for my websocket app that uses self singed ssl certificates.

Example

import ssl


ctx = ssl._create_unverified_context()
url = f"wss://localhost:8001/ws/v1/alert"

async with websockets.connect(url, ssl=ctx) as websocket:
    pass

Answer 12

first import ssl then make a variable like this with three lines of code in your python script file-

ctx = ssl.create_default_context()
ctx.check_hostname = False
ctx.verify_mode = ssl.CERT_NONE

An Example that I have use in html parsing with beautifulsoup was like this -

import urllib.request,urllib.parse,urllib.error

from bs4 import BeautifulSoup
import ssl

ctx = ssl.create_default_context()
ctx.check_hostname = False
ctx.verify_mode = ssl.CERT_NONE


url = input('Enter - ')
html = urllib.request.urlopen(url, context=ctx).read()
soup = BeautifulSoup(html, 'html.parser')

Answer 13

If you want to disable SSL verification globally (not a good idea, but it has its uses), as Authlib states:

You can force all requests to disable SSL verification by setting your environment variable CURL_CA_BUNDLE="".

However, requests uses the enviroment variable REQUESTS_CA_BUNDLE in order to list all CAs, but you can force it to "fall back" on CURL_CA_BUNDLE.

In their documentation:

This list of trusted CAs can also be specified through the REQUESTS_CA_BUNDLE environment variable. If REQUESTS_CA_BUNDLE is not set, CURL_CA_BUNDLE will be used as fallback.

So, you can just change the enviroment variables at the begining of your script:

import os

os.environ['REQUESTS_CA_BUNDLE'] = ""
os.environ['CURL_CA_BUNDLE'] = ""  # in most instances you don't even need this