>       From: owner-openssl-us...@openssl.org On Behalf Of ikuzar
>       Sent: Monday, 14 March, 2011 11:48

>       I 'd like to know how to desable data compression procedure. 
> The compression flag is set to "yes" in tcp stream.

It isn't really "in" the "stream". SSL optional compression is 
negotiated during the handshake, along with the ciphersuite, and 
then applies to all subsequent data until/unless renegotiated.

>       In fact, I would like to observe difference between plain text 
> ( by setting NULL-SHA ) and cipher text ( by setting AES256-SHA ) 
> using wireshark. I cannot make this observation if data is compressed. 

Option SSL_OP_NO_COMPRESSION is commented as 
/* Don't use compression even if supported */
and is used in what looks like the right places.

Alternatively, if either client or server is using an openssl 
built without zlib available, it won't agree to compression.



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