SSL Certificate Verify Failed

[bySam]

Long story short

I get a SSL certificate verification error running aiohttp despite being able to connect to the website using Firefox and cURL.

Expected behaviour

To get my response

Actual behaviour

See Long Story Short

Steps to reproduce

`    with aiohttp.Timeout(10):
        session = aiohttp.ClientSession()
        url = 'https://api.lootbox.eu/pc/us/'
        async with session.get(url) as response:
            if response.status == 200:
                rtxt = await response.text()`

Your environment

Windows 10, Python 3.5.2

[asvetlov]

I don't know what's wrong with certificates for your site but you may disable certificate checks by passing verify_ssl=False to connector ctor:

session = aiohhtp.ClientSession(connector=aiohttp.TCPConnector(verify_ssl=False))

[mickeyl]

FWIW, (sadly) there are a lot of embedded systems out there which contain invalid SSL certificates. Systems which we can't update / are not under our maintenance. For these cases it's good that we can disable certification validation with aiohttp.

[asvetlov]

For your pleasure

[monkeym4ster]

Navigate to
cd /Applications/Python\ 3.7/

Click on Install Certificates.command

This should solve it.

[john-shine]

Better with certifi module:

import ssl
import certifi

sslcontext = ssl.create_default_context(cafile=certifi.where())
with aiohttp.Timeout(10):
        ......
        async with session.get(url, ssl=sslcontext) as response:
            ......

[kerchner]

On my Mac with Python 3.8, running this resolved it:
/System/Volumes/Data/Applications/Python 3.8/Install Certificates.command

[lk-jeffpeck]

For anyone still looking for this and using conda, also check your conda version:
conda/conda-build#2255

[Cowm00]

FYI, verify_ssl is deprecated, use ssl=False instead:
connector=aiohttp.TCPConnector(ssl=False)

[merrymercy]

@monkeym4ster It works! Thanks

[VAUsIGT]

"SSL: CERTIFICATE_VERIFY_FAILED" - the bot tries to contact the site, but sees an unknown certificate on it. You need to manually upload this certificate to trusted:

1. On the website, click on the lock (next to the url) --> find a valid certificate --> in the advanced tab, export it in the ".crt" format
2. Open "MMC" via start. Next, file --> add snap-in --> certificates --> add --> my account (then also add for local PC) --> open certificates - local PC through the root of the console --> action --> all tasks --> next and overview --> find the certificate downloaded in paragraph 1 --> done!

[hayotech]

Navigate to cd /Applications/Python\ 3.7/

Click on Install Certificates.command

This should solve it.

This solved the problem %100. Thanks!