guettli guettli - 1 year ago 120
Python Question

pip: cert failed, but curl works

We installed the our root cert on the client, and the https connection works for


But if we try to use
, it fails:

Could not fetch URL https://installserver:40443/pypi/simple/pep8/:
There was a problem confirming the ssl certificate:
<urlopen error [Errno 1] _ssl.c:499: error:14090086:SSL
routines:SSL3_GET_SERVER_CERTIFICATE:certificate verify failed>

The cert is on the client. See:

(foo_fm_qti)foo_fm_qti@vis-work:~$ curl -v https://installserver:40443/pypi/simple/pep8/
* About to connect() to installserver port 40443 (#0)
* Trying connected
* Connected to installserver ( port 40443 (#0)
* successfully set certificate verify locations:
* CAfile: none
CApath: /etc/ssl/certs/
* SSLv3, TLS handshake, Client hello (1):
* SSLv3, TLS alert, Client hello (1):
* SSLv3, TLS handshake, Server hello (2):
* SSLv3, TLS handshake, CERT (11):
* SSLv3, TLS handshake, Server key exchange (12):
* SSLv3, TLS handshake, Server finished (14):
* SSLv3, TLS handshake, Client key exchange (16):
* SSLv3, TLS change cipher, Client hello (1):
* SSLv3, TLS handshake, Finished (20):
* SSLv3, TLS change cipher, Client hello (1):
* SSLv3, TLS handshake, Finished (20):
* SSL connection using DHE-RSA-AES256-SHA
* Server certificate:
* subject: C=DE; ST=Sachsen; L=Chemnitz; O=FOO-COM GmbH; OU=DV;;
* start date: 2013-09-09 10:47:50 GMT
* expire date: 2019-05-24 10:47:50 GMT
* subjectAltName: installserver matched
* issuer: C=DE; ST=Sachsen; L=Chemnitz; O=FOO-COM GmbH; CN=FOO-COM Root CA;
* SSL certificate verify ok.
> GET /pypi/simple/pep8/ HTTP/1.1

Version: pip 1.4.1

Answer Source

Unfortunately pip does not use the system certs, but curl does.

I found a solution:

pip --cert /etc/ssl/certs/FOO_Root_CA.pem install pep8

This is not nice (curl and other libraries find the cert without adding a parameter) but works.

If you don't want to use the command line argument, you can set the cert in ~/.pip/pip.conf:

cert = /etc/ssl/certs/Foo_Root_CA.pem
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