Companion

The certificate does not match the expected identity of the site that it was retrieved from.

The certificate has expired

Some other error occurred validating the certificate

The certificate's algorithm is considered insecure.

No flags set. Since: 2.74

The certificate's activation time is still in the future

The certificate has been revoked according to the #GTlsConnection's certificate revocation list.

The signing certificate authority is not known.

the combination of all of the above flags