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win32: add a method to trigger the Crypto API to complete a certificate chain...
win32: add a method to trigger the Crypto API to complete a certificate chain I started a thread[1] on the mailing list awhile ago, but the short version is that Windows doesn't ship with a full list of certificates[2]. Even if the server sends the whole chain, if Windows doesn't have the appropriate certificate pre-installed in its "Third-Party Root Certification Authorities" store, connections mysteriously fail with: abort: error: [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:661) Windows expects the application to call the methods invoked here as part of the certificate verification, triggering a call out to Windows update if necessary, to complete the trust chain. The python bug to add this support[3] hasn't had any recent activity, and isn't targeting py27 anyway. The only work around that I could find (besides figuring out the certificate and walking through the import wizard) is to browse to the site in Internet Explorer. Opening the page with FireFox or Chrome didn't work. That's a pretty obscure way to fix a pretty obscure problem. We go to great lengths to demystify various SSL errors, but this case is clearly lacking. Let's try to make things easier to diagnose and fix. When I had trouble figuring out how to get ctypes to work with all of the API pointers, I found that there are other python projects[4] using this API to achieve the same thing. [1] https://www.mercurial-scm.org/pipermail/mercurial-devel/2017-April/096501.html [2] https://support.microsoft.com/en-us/help/931125/how-to-get-a-root-certificate-update-for-windows [3] https://bugs.python.org/issue20916 [4] https://github.com/nvaccess/nvda/blob/3b86bce2066b1934df14b96f2e83369900860ecf/source/updateCheck.py#L511

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client-key.pem
30 lines | 1.7 KiB | application/pgp-keys | AscLexer
-----BEGIN RSA PRIVATE KEY-----
Proc-Type: 4,ENCRYPTED
DEK-Info: AES-256-CBC,ADE9D82AA8D8023CD4E9B67FECD9FE08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-----END RSA PRIVATE KEY-----