require 'net/ssh/transport/hmac/abstract' module Net::SSH::Transport::HMAC if defined?(OpenSSL::Digest::SHA512) # need openssl support # The SHA-512 HMAC algorithm. This has a mac and key length of 64, and # uses the SHA-512 digest algorithm. class SHA2_512 < Abstract mac_length 64 key_length 64 digest_class OpenSSL::Digest::SHA512 end end end