def authenticate(next_service, username, password=nil)
return false unless password
send_message(userauth_request(username, next_service, "password", false, password))
message = session.next_message
case message.type
when USERAUTH_SUCCESS
debug { "password succeeded" }
return true
when USERAUTH_FAILURE
debug { "password failed" }
return false
when USERAUTH_PASSWD_CHANGEREQ
debug { "password change request received, failing" }
return false
else
raise Net::SSH::Exception, "unexpected reply to USERAUTH_REQUEST: #{message.type} (#{message.inspect})"
end
end