require 'net/ssh/transport/hmac/md5' require 'net/ssh/transport/hmac/md5_96' require 'net/ssh/transport/hmac/sha1' require 'net/ssh/transport/hmac/sha1_96' require 'net/ssh/transport/hmac/none' # Implements a simple factory interface for fetching hmac implementations, or # for finding the key lengths for hmac implementations.s module Net::SSH::Transport::HMAC # The mapping of SSH hmac algorithms to their implementations MAP = { 'hmac-md5' => MD5, 'hmac-md5-96' => MD5_96, 'hmac-sha1' => SHA1, 'hmac-sha1-96' => SHA1_96, 'none' => None } # Retrieves a new hmac instance of the given SSH type (+name+). If +key+ is # given, the new instance will be initialized with that key. def self.get(name, key="") impl = MAP[name] or raise ArgumentError, "hmac not found: #{name.inspect}" impl.new(key) end # Retrieves the key length for the hmac of the given SSH type (+name+). def self.key_length(name) impl = MAP[name] or raise ArgumentError, "hmac not found: #{name.inspect}" impl.key_length end end