[B<-bytes> I<num>]
[B<-mr>]
{- $OpenSSL::safe::opt_r_synopsis -}
-{- $OpenSSL::safe::opt_engine_synopsis -}
-{- $OpenSSL::safe::opt_provider_synopsis -}
+{- $OpenSSL::safe::opt_engine_synopsis -}{- $OpenSSL::safe::opt_provider_synopsis -}
[I<algorithm> ...]
=for openssl ifdef hmac cmac multi async_jobs engine