I have a python script that uses the VirusTotal API. It has been working with no problems, but all of a sudden when I run the script I am getting the following error:
urllib2.URLError: <urlopen error [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:590)>
I believe it may be our web proxy that is causing the issue. Is there a way to prevent it from verifying the cert? Here is the portion of the code that uses the API:
json_out = []
url = "https://www.virustotal.com/vtapi/v2/file/report"
parameters = {"resource": my_list,
"apikey": "<MY API KEY>"}
data = urllib.urlencode(parameters)
req = urllib2.Request(url, data)
response = urllib2.urlopen(req)
json_out.append (response.read())
I believe it may be our web proxy that is causing the issue. Is there a way to prevent it from verifying the cert?
If you assume that a SSL intercepting proxy is denying the connection then you have to fix the problem at the proxy, i.e. there is no way to instruct the proxy to not check the certificate from your application.
If instead you assume that there is a SSL intercepting proxy and thus the certificate you receive is not signed by a CA you trust then you should get the CA of the proxy and trust it in your application (see cafile parameter in the documentation). Disabling validation is almost never the right way. Instead fix it so that validation works.
There are two possibilities,
You are using a self-signed certificate. Browsers don not trust on such certificate, so be sure that you are using CA-signed trusted certificate.
If you are using CA-signed trusted the certificate that you should have to check for install CA chain certificates (Root and Intermediate certificate).
You can refer this article, it may help you. - https://access.redhat.com/articles/2039753
Related
I'm trying to send a GET request to a host with (supposedly) correct certificates.
It's a university task, and they gave me these certificates. (which are only valid for 30 seconds)
But the code below gives me the error that certificate verify failed: self signed certificate
The package I got from the host in response says that Fatal Error: Unknown CA.
What could cause the issue? Thanks!
context = ssl.SSLContext(ssl.PROTOCOL_TLSv1_2)
context.load_cert_chain('clientcert.pem', keyfile='clientkey.pem')
connection = http.client.HTTPSConnection(IP)
connection.request("GET", "/")
response = connection.getresponse()
print("response:", response)
The error message seems to be self-explanatory. Self-signed SSL certificates always cause security warnings/errors. You will either need to add your self-signed SSL as an exception or add the self-signed CA to OS trusted certificates pool.
You may also try using something identical to --insecure option in curl.
I have installed apache web server. Generated SSL for the apache website. Got cert file and key. I wrote a python snippet to validate the ssl file for the website. The certificate file path is stored in cer_auth. My code will access file in the cer_auth,validates it and provide the result. But it is showing error. How to solve it?
Here's the code:
import requests
host = '192.168.1.27'
host1 = 'https://'+host
#cer_auth = '/etc/ssl/certs/ca-certificates.crt'
cer_auth = '/home/paulsteven/Apache_SSL/apache-selfsigned.crt'
print(host1)
try:
requests.get(host1, verify= cer_auth)
print("SSL Certificate Verified")
except:
print("No SSL certificate")
Error i got:
https://192.168.1.27
/home/paulsteven/.local/lib/python3.5/site-packages/urllib3/connection.py:362: SubjectAltNameWarning: Certificate for 192.168.1.27 has no `subjectAltName`, falling back to check for a `commonName` for now. This feature is being removed by major browsers and deprecated by RFC 2818. (See https://github.com/shazow/urllib3/issues/497 for details.)
SubjectAltNameWarning
No SSL certificate
The old way of pointing certificates to hostnames was through the CommonName or CN field. This practice is rapidly changing due to changes in how browsers handle certificates. The current expectation is to have all hostnames and IPs in x509v3 extended fields in the certificate, named subjectAlternativeNames. The instructions you have followed were probably outdated.
Here's a mediocre guide into doing just that with OpenSSL
https://support.citrix.com/article/CTX135602
If you want to sign for some IP addresses, the field name is IP.1 instead of DNS.1 like in the link above.
I'm trying to solve the problem
requests.exceptions.SSLError: [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:579)
when I connect to a handle server.
I also used
ssl._create_default_https_context = ssl._create_unverified_context
as some user suggested, but I'm not able to fix the issue.
Any other solution?
Thanks
Does your server have a valid certificate, signed by a Certification Authority?
If it uses a self-signed certificate I would suggest that you save a copy of the public certificate in your Python project and pass the certificate name in the verify parameter on requests.
You can save the certificate by accessing the server on Firefox, clicking on the Lock icon near to the address bar, selecting the Certificate, then More details, then View Certificate, then export.
You will get a .pem file, let's say: "my_server_certificate.pem".
Then when you create your Session object on requests you can pass the parameter:
session = requests.Session()
session.verify = "my_server_certificate.pem"
I had similar problems when using charles proxy with my Python scripts. I hope this helps you solve your problem as well.
I am trying to connect to the Visa Direct API, but i am not passing the basic SSL certificate authetification, here is my code:
import requests
headers = { 'Content-Type' : 'Application/json' }
url = 'https://sandbox.visa.com/rsrv_vpp/v1/acnl'
payload = {"SystemsTraceAuditNumber":565690,
"RetrievalReferenceNumber":"505012455690",
"AcquiringBin":409999,
"AcquirerCountryCode":"840",
"PrimaryAccountNumber":"4895070000008881"}
r = requests.post(url, data=json.dumps(payload),
cert =('/etc/ssl/certs/sandbox_cert.pem'), headers=headers,
auth=('370df57a-a8aa-4446-a23e-44a0ef06ea09',
'6023e518-c36c-47a8-b16e-c8a5b3a941ef'))
Ass you can see i am using request and passing the cert argument along with the API user and password info but i keep getting the error:
requests.exceptions.SSLError: [Errno 1] _ssl.c:510: error:14090086:SSL routines:SSL3_GET_SERVER_CERTIFICATE:certificate verify failed
I get a SSL error when I try to open https://sandbox.visa.com/rsrv_vpp/v1/acnl in Google Chrome.
The Visa Docs say
SSL Server Authentication
The SSL server certificate installed on sandbox.visa.com servers is a
Visa issued self-signed certificate. Client applications need to add
the sandbox.visa.com SSL certificate to their local trust store to
prevent SSL Handshake errors at runtime.
Ensure that your application that connects to the Visa Direct API is
configured (or built) to use the trusted certificate store as a trust
store, and not a key store.
Verify that the application is configured to use the right password
associated with the trust store file.
It looks like you need to do do some SSL Authentication before you can connect to Visa.
I am trying to write a pycurl script to access a secured site (HTTPS).
c = pycurl.Curl()
c.setopt(pycurl.USERAGENT, 'Mozilla/5.0 (Windows NT 6.1; WOW64; rv:8.0) Gecko/20100101 Firefox/8.0')
c.setopt(pycurl.URL, 'https://for-example-securedsite')
c.setopt(pycurl.COOKIEFILE, 'cookie.txt')
c.setopt(pycurl.COOKIEJAR, 'cookies.txt')
c.setopt(pycurl.WRITEDATA, file("page.html","wb"))
I am getting the below error..
pycurl.error: (60, 'SSL certificate problem, verify that the CA cert is OK. Details:\nerror:14090086:SSL routines:SSL3_GET_SERVER_CERTIFICATE:certificate verify failed')
The code failed, as it failed to get the SSL cert.
The error went away if I add the below lines to my code.
c.setopt(pycurl.SSL_VERIFYPEER, 0)
c.setopt(pycurl.SSL_VERIFYHOST, 0)
The above code will skip the certificate verification. But its subjected to 'man in middle' attack.
I know I have the SSL certificate in my local certificate store. Do anyone know how to export my certificate and use it my code.. Some sample codes will be awesome..
Thanks for your time!
You are right, the way you are doing it subjects you to a man-in-the-middle attack, especially in light of the most recent SSL vulnerabilities. You can resolve it as follows:
import pycurl
curl = pycurl.Curl()
curl.setopt(pycurl.URL, "https://your-secure-website.com/")
curl.setopt(pycurl.SSL_VERIFYPEER, 1)
curl.setopt(pycurl.SSL_VERIFYHOST, 2)
curl.setopt(pycurl.CAINFO, "/path/to/updated-certificate-chain.crt")
curl.perform()
curl by default comes with an outdated certificate list. Whether you want to update it or just use your own certs for testing, make sure to place the updated-certificate-chain.crt file in an accessible location and use the pycurl.CAINFO option to point to it.
Also make sure pycurl.SSL_VERIFYHOST is set to 2, the highest security check setting.
It happened to me using python 3 in windows, getting this error :
(60, 'SSL certificate problem: unable to get local issuer certificate')
The final two solutions :
1 - adding a certificate, curl.setopt(pycurl.CAINFO, "c:\certs\ssl.cert")
OR
2 - ignoring the ssl verification using :
curl.setopt(pycurl.SSL_VERIFYPEER, 0)
curl.setopt(pycurl.SSL_VERIFYHOST, 0)
# for all python users in windows.
Have you read the cURL documentation about SSL certificates? This seems to directly address your question...in particular, item 2:
2. Get a CA certificate that can verify the remote server and use the proper
option to point out this CA cert for verification when connecting. For
libcurl hackers: curl_easy_setopt(curl, CURLOPT_CAPATH, capath);
It looks like the pycurl module contains the CAPATH option, so this should be simple to implement in your code.
The Solution to this problem lies in providing the curl object access to the 'https' based protocol url's via insecure argument In a cmd terminal we exclusively input the arg '-k'
In Pycurl we have to set the same option to the curl object by the methods as below, with minimal level of security i.e '0'.
c.setopt(pycurl.SSL_VERIFYPEER, 0)
c.setopt(pycurl.SSL_VERIFYHOST, 0)
allow the insecure connection
After which, access to the SSL is made without any obstruction