SSL certificate verification fails (CERTIFICATE_VERIFY_FAILED)

[overdue82]

I'm trying to do a backup of all files and media on my tumblr and my likes, but keep getting
<urlopen error [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed <_ssl.c:590>>

I already allowed the program in API application settings and copied the API Key to the tumblr_backup.py but now the problem above persists. Unless I filled something out on the application wrong? I didn't know what to put for the urls so I used mine tumblr url. This is how I filled out the API application.

• Application Name: backup tumblr posts
• Application Website: my tumblr url
• Application Description: backup tumblr posts
• Administrative contact email: my email
• Default callback URL: my tumblr url

[bbolli]

Try with option -S, please.

[bbolli]

If you're on macOS, see #226.

[cebtenzzre]

This is a related but different issue: Some builds of Python 2 don't support SNI (Server Name Indication) and will sometimes complain about certificate verification errors. There are three ways to work around this:

• You could try my fork, which handles this the same way requests does (requires pyOpenSSL)
• You could try installing Python 2 via homebrew (relevant SO post) (or on other platforms, just updating it), which might get you a build that supports SNI
• You can disable SSL certificate verification with -S

[overdue82]

Just a heads up. I'm on Windows and the problem resolved itself after I updated Python. I must've been using an old version and for whatever reason it was giving me verification errors. I don't know but it resolved after I updated.

Also using -S never worked with the tag "tumblr_backup.py username -S" or so I read on another similar thread. I tried that before updating and it give me an unknown error because it didn't recognize "-S". Unless I was doing that wrong. I don't know but like I said it resolved after the update. I'm only replying now because I kept getting email notifications.

[bbolli]

Also using -S never worked with the tag "tumblr_backup.py username -S"

Options generally go before the non-options, so the command should have been tumblr_backup.py -S username.

[cebtenzzre]

I'm reopening this issue so it can be tracked separately. Certificate verification errors are tracked here, TLS protocol version errors are tracked in #226.