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# encoding: UTF-8
require 'sha1'
require 'xmlrpc/client'
require 'timeout'
module Mauve
#
# Base class for authentication.
#
class Authentication
ORDER = []
# Autenticates a user.
#
# @param [String] login
# @param [String] password
#
# @return [FalseClass] Always returns false.
def authenticate(login, password)
raise ArgumentError.new("Login must be a string, not a #{login.class}") if String != login.class
raise ArgumentError.new("Password must be a string, not a #{password.class}") if String != password.class
raise ArgumentError.new("Login or/and password is/are empty.") if login.empty? || password.empty?
return false unless Mauve::Configuration.current.people.has_key?(login)
false
end
# @return [Log4r::Logger]
def logger
self.class.logger
end
# @return [Log4r::Logger]
def self.logger
@logger ||= Log4r::Logger.new(self.to_s)
end
# This calls all classes in the ORDER array one by one. If all classes
# fail, a 5 second sleep rate-limits authentication attempts.
#
# @param [String] login
# @param [String] password
#
# @return [Boolean] Success or failure.
#
def self.authenticate(login, password)
result = false
ORDER.any? do |klass|
auth = klass.new
result = begin
auth.authenticate(login, password)
rescue StandardError => ex
logger.error "#{ex.class}: #{ex.to_s} during #{auth.class} for #{login}"
logger.debug ex.backtrace.join("\n")
false
end
logger.info "Authenticated #{login} using #{auth.class.to_s}" if true == result
result
end
unless true == result
logger.info "Authentication for #{login} failed"
# Rate limit
sleep 5
end
result
end
end
# This is the Bytemark authentication mechansim.
#
class AuthBytemark < Authentication
Mauve::Authentication::ORDER << self
# Set up the Bytemark authenticator
#
# @todo allow configuration of where the server is.
#
# @param [String] srv Authentication server name
# @param [String] port Port overwhich authentication should take place
#
# @return [Mauve::AuthBytemark]
#
def initialize (srv='auth.bytemark.co.uk', port=443)
raise ArgumentError.new("Server must be a String, not a #{srv.class}") if String != srv.class
raise ArgumentError.new("Port must be a Fixnum, not a #{port.class}") if Fixnum != port.class
@srv = srv
@port = port
@timeout = 7
self
end
# Tests to see if a server is alive, alive-o.
#
# @deprecated Not really needed.
#
# @return [Boolean]
def ping
begin
Timeout.timeout(@timeout) do
s = TCPSocket.open(@srv, @port)
s.close()
return true
end
rescue Timeout::Error => ex
return false
rescue => ex
return false
end
return false
end
# Authenticate against the Bytemark server
#
# @param [String] login
# @param [String] password
#
# @return [Boolean]
def authenticate(login, password)
super
client = XMLRPC::Client.new(@srv,"/",@port,nil,nil,nil,nil,true,@timeout).proxy("bytemark.auth")
begin
challenge = client.getChallengeForUser(login)
response = Digest::SHA1.new.update(challenge).update(password).hexdigest
client.login(login, response)
return true
rescue XMLRPC::FaultException => fault
logger.warn "Authentication for #{login} failed: #{fault.faultCode}: #{fault.faultString}"
return false
rescue IOError => ex
logger.warn "#{ex.class} during auth for #{login} (#{ex.to_s})"
return false
end
end
end
# This is the local authentication mechansim, i.e. against the values in the
# Mauve config file.
#
class AuthLocal < Authentication
Mauve::Authentication::ORDER << self
# Authenticate against the local configuration
#
# @param [String] login
# @param [String] password
#
# @return [Boolean]
def authenticate(login,password)
super
Digest::SHA1.hexdigest(password) == Mauve::Configuration.current.people[login].password
end
end
end
|
