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#--
# =============================================================================
# Copyright (c) 2004,2005 Jamis Buck (jamis@37signals.com)
# All rights reserved.
#
# This source file is distributed as part of the Net::SSH Secure Shell Client
# library for Ruby. This file (and the library as a whole) may be used only as
# allowed by either the BSD license, or the Ruby license (or, by association
# with the Ruby license, the GPL). See the "doc" subdirectory of the Net::SSH
# distribution for the texts of these licenses.
# -----------------------------------------------------------------------------
# net-ssh website : http://net-ssh.rubyforge.org
# project website: http://rubyforge.org/projects/net-ssh
# =============================================================================
#++
require 'net/ssh/errors'
require 'net/ssh/userauth/constants'
module Net
module SSH
module UserAuth
module Methods
# Implements the "password" SSH authentication method.
class Password
include Net::SSH::UserAuth::Constants
# The messenger to use when communicating.
attr_writer :messenger
# Create a new Password authenticator. It will use the given buffers
# factory to create new buffer instances.
def initialize( buffers )
@buffers = buffers
end
# Attempt to authenticate the given user for the given service. The
# data hash must specify a <tt>:password</tt> value, otherwise this
# will always return false.
def authenticate( next_service, username, data={} )
return false unless data[:password]
msg = @buffers.writer
msg.write_byte USERAUTH_REQUEST
msg.write_string username
msg.write_string next_service
msg.write_string "password"
msg.write_bool false
msg.write_string data[:password]
@messenger.send_message msg
message = @messenger.wait_for_message
case message.message_type
when USERAUTH_SUCCESS
return true
when USERAUTH_FAILURE, USERAUTH_PASSWD_CHANGEREQ
return false
else
raise Net::SSH::Exception,
"unexpected reply to USERAUTH_REQUEST: #{message.inspect}"
end
end
end
end
end
end
end
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