Blake2b with key

Blumenthal, Uri - 0553 - MITLL uri at
Tue Oct 8 15:03:45 UTC 2019

 >   > Is keyed blake2b supported in openssl-dgst (latest OpenSSL release)?
 >   No, sorry.  It has been added for upcoming OpenSSL 3.0, though.
Doesn't look like it's there:

$ openssl3 version
OpenSSL 3.0.0-dev xx XXX xxxx (Library: OpenSSL 3.0.0-dev xx XXX xxxx)
$ echo -n "hello" | openssl3 dgst -blake2b512
BLAKE2b512(stdin)= e4cfa39a3d37be31c59609e807970799caa68a19bfaa15135f165085e01d41a65ba1e1b146aeb6bd0092b49eac214c103ccfa3a365954bbbe52f74a2b3620c94
$ echo -n "hello" | openssl3 dgst -blake2b512 -mac blake2bmac -macopt key:secret
Algorithm blake2bmac not found

Besides, how does one print a list of supported MAC algorithms?


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