How to fix SSL Certificate Problem in Pidgin and MSN

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Just did an auto update. Among the list of things was an SSL update and now I can no longer connect to my MSN account in Pidgeon. I get an error "unable to validate certificate, the certificate for Omega.contacts.msn.com could not be validated. The certificate chain present is invalid."

Solution 1

How to replace your certficate (the GUI method):

Go to pidgin's Tools->Certificates to remove the old certificate. Don't close this window yet. (You can, but it is easier to not)

With your browser, go to https://omega.contacts.msn.com. It will give you "Directory Listing Denied"

With Firefox, if you click on the lock in the lower right corner, you get a dialog box, where you can click on View Certificate. On its Details tab, you can export the certificate to a file.

Now, back on the pidgin Tools->Certificates dialog, you can add this certificate

Solution 2

1. Close Pid­gin
2. Find your cer­tifi­cates folder (Win­dows: %appdata%\.purple) (Linux: /home/.purple)
3. Delete every­thing in the cer­tifi­cate folder.
4. Restart pid­gin and even­tu­ally you should get a new cer­tifi­cate that works.

P.S: Win­dows users who aren’t fami­lar with %app­data% just type %appdata%\.purple in your address bar and press enter.

Solution 3

The first thing is to remove the invalid cer­tifi­cate. This can be done from Tools->Certificates.

After that, you might try to just recon­nect and it might get a valid cer­tifi­cate, and you are done.

In case you are not, if run­ning on Linux, you can do:

echo QUIT | openssl s_client –con­nect omega?.con?tacts?.msn?.com:443 | openssl x509 > omega?.con?tacts?.msn?.com

And copy that file to: ~/.purple/certificates/x509/tls_peers

If you use windows 7

Go to C:\Users\{USER}\AppData\Roaming\.purple\certificates\x509\tls_peers\

delete the omega?.con?tacts?.msn?.com file and restart pidgin

Source from here

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