improve SSL_CTX_set_tlsext_ticket_key_cb ref impl
improve reference implementation code in
SSL_CTX_set_tlsext_ticket_key_cb man page
change EVP_aes_128_cbc() to EVP_aes_256_cbc(), with the implication
of requiring longer keys. Updating this code brings the reference
implementation in line with implementation in openssl committed in 2016:
commit
05df5c20
Use AES256 for the default encryption algoritm for TLS session tickets
add comments where user-implementation is needed to complete code
CLA: trivial
Reviewed-by: Tomas Mraz <tmraz@fedoraproject.org>
Reviewed-by: Ben Kaduk <kaduk@mit.edu>
Reviewed-by: Matt Caswell <matt@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/12063)