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Robert Ransom
fe1137be6f
SSL_*_app_data uses ex_data index 0, which will be the first one allocated by SSL_get_ex_new_index. Thus, if we ever started using the ex_data feature for some other purpose, or a library linked to Tor ever started using OpenSSL's ex_data feature, Tor would break in spectacular and mysterious ways. Using the SSL_*_ex_data functions directly now may save us from that particular form of breakage in the future. But I would not be surprised if using OpenSSL's ex_data functions at all (directly or not) comes back to bite us on our backends quite hard. The specified behaviour of dup_func in the man page is stupid, and crypto/ex_data.c is a horrific mess.
Tor protects your privacy on the internet by hiding the connection
between your Internet address and the services you use. We believe Tor
is reasonably secure, but please ensure you read the instructions and
configure it properly.
To build Tor from source:
./configure && make && make install
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https://wiki.torproject.org/noreply/TheOnionRouter/TorFAQ