Install/Build openssl with following ciphers - TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384, TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384, TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256

[Matt Caswell]

On 10/05/2021 06:38, Mario Ds Briggs wrote:
> In the openssl libs that i have installed on ubuntu/rhel/mac-os, i dont 
> find the following ciphers when i run 'openssl ciphers' command
> TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384, 
> TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384, 
> TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, 
> TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256

These are the standard IETF names for these ciphersuites. OpenSSL calls 
them something slightly different. So for example 
"TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384" is known as 
"ECDHE-ECDSA-AES256-GCM-SHA384" in OpenSSL.

Most likely you are using a version of OpenSSL that does have support 
for these ciphersuites, but you are not seeing it in the "ciphers" 
output because of the above. You can get "ciphers" to display the 
standard name as well as the OpenSSL name using the command below:

$ openssl ciphers -v -stdname


Matt