[openssl-users] unknown cipher?

Henderson, Karl KHenderson at verisign.com
Tue Jul 31 21:08:55 UTC 2018

Hi All,

I’m a bit confused. We’re trying to get some number of the relative efficiency of different cypher algorithms using the openssl tool.

When I type:

openssl ciphers -tls1_3 -stdname -V

I see this as one of the results:

          0x13,0x02 - TLS_AES_256_GCM_SHA384 - TLS_AES_256_GCM_SHA384  TLSv1.3 Kx=any      Au=any  Enc=AESGCM(256) Mac=AEAD

However, when I try to do a speed test on this algorithm

openssl speed -evp TLS_AES_256_GCM_SHA384

speed: TLS_AES_256_GCM_SHA384 is an unknown cipher or digest

What am I missing?

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