This should do it: openssl s_server -cert /path/to/cert -key /path/to/key -cipher eNULL@SECLEVEL=0 -no_tls1_3 >From the client side: openssl s_client -cipher eNULL@SECLEVEL=0 Matt On 27/08/2020 05:32, vishwas k.n. wrote: > Hello All, > > Could someone please let me know what is the right way to enable > null-ciphers in openssl. I want to do some performance evaluations with > openssl and as a part of the exercise, want to tabulate performance with > null encryption ciphers too. > > Want to get this working with openssl s_server to begin with. > > I have come across various answers where people have suggested: > 1. specify the cipher list using SSL_CTX_set_cipher_list with cipher > list being only eNULL. > 2. SSL_CTX_set_security_level with level=0. > Have tried doing this from the client side but to no avail. > > On the server side, I have added -cipher "COMPLEMENTOFALL" to s_server > to add the null ciphers. > > Is there a config option that needs to be enabled or a code change to go > with ? > > thanks, > -vishwas.
