On: How to Use Secure Sockets in C on Linux

[Rygian]

I would have liked to see the logic on client side to decide if the certificate presented by the server is valid.

[Retr0id → Rygian]

I'm a little surprised the OpenSSL API doesn't force you to consider this by default, but indeed it does not: https://www.openssl.org/docs/manmaster/man3/SSL_CTX_new.html...

> On session establishment, by default, no peer credentials verification is done. This must be explicitly requested, typically using SSL_CTX_set_verify(3).

Aside: According to those docs, SSLv23_client_method() is deprecated.

[Severian → Retr0id]

Yeah, not verifying server cert or OCSP/CRLs is a problem. DNS attacks can redirect and you'd be none the wiser.

[ranger_danger → Rygian]

The page was updated to include that.

[Rygian → ranger_danger]

Well done!