Does a strict host verification, looking the server up in the known host files to see if a key has already been seen for this server. If this server does not appear in any host file, an exception will be raised (HostKeyUnknown). This is in contrast to the “Strict” class, which will silently add the key to your known_hosts file. If the server does appear at least once, but the key given does not match any known for the server, an exception will be raised (HostKeyMismatch). Otherwise, this returns true.
# File lib/net/ssh/verifiers/secure.rb, line 15 def verify(arguments) host_keys = arguments[:session].host_keys # We've never seen this host before, so raise an exception. if host_keys.empty? process_cache_miss(host_keys, arguments, HostKeyUnknown, "is unknown") end # If we found any matches, check to see that the key type and # blob also match. found = host_keys.any? do |key| key.ssh_type == arguments[:key].ssh_type && key.to_blob == arguments[:key].to_blob end # If a match was found, return true. Otherwise, raise an exception # indicating that the key was not recognized. unless found process_cache_miss(host_keys, arguments, HostKeyMismatch, "does not match") end found end