3 # :title: User management
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5 # rbot user management
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6 # Author:: Giuseppe Bilotta (giuseppe.bilotta@gmail.com)
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7 # Copyright:: Copyright (c) 2006 Giuseppe Bilotta
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16 # This module contains the actual Authentication stuff
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20 BotConfig.register BotConfigStringValue.new( 'auth.password',
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21 :default => 'rbotauth', :wizard => true,
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22 :desc => 'Password for the bot owner' )
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23 BotConfig.register BotConfigBooleanValue.new( 'auth.login_by_mask',
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25 :desc => 'Set false to prevent new botusers from logging in without a password when the user netmask is known')
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26 BotConfig.register BotConfigBooleanValue.new( 'auth.autologin',
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28 :desc => 'Set false to prevent new botusers from recognizing IRC users without a need to manually login')
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29 # BotConfig.register BotConfigIntegerValue.new( 'auth.default_level',
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30 # :default => 10, :wizard => true,
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31 # :desc => 'The default level for new/unknown users' )
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33 # Generate a random password of length _l_
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35 def Auth.random_password(l=8)
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38 pwd += (rand(26) + (rand(2) == 0 ? 65 : 97) ).chr
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44 # An Irc::Auth::Command defines a command by its "path":
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46 # base::command::subcommand::subsubcommand::subsubsubcommand
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50 attr_reader :command, :path
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52 # A method that checks if a given _cmd_ is in a form that can be
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53 # reduced into a canonical command path, and if so, returns it
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55 def sanitize_command_path(cmd)
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56 pre = cmd.to_s.downcase.gsub(/^\*?(?:::)?/,"").gsub(/::$/,"")
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57 return pre if pre.empty?
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58 return pre if pre =~ /^\S+(::\S+)*$/
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59 raise TypeError, "#{cmd.inspect} is not a valid command"
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62 # Creates a new Command from a given string; you can then access
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63 # the command as a symbol with the :command method and the whole
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66 # Command.new("core::auth::save").path => [:"*", :"core", :"core::auth", :"core::auth::save"]
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68 # Command.new("core::auth::save").command => :"core::auth::save"
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71 cmdpath = sanitize_command_path(cmd).split('::')
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72 seq = cmdpath.inject(["*"]) { |list, cmd|
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73 list << (list.length > 1 ? list.last + "::" : "") + cmd
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75 @path = seq.map { |k|
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78 @command = path.last
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79 debug "Created command #{@command.inspect} with path #{@path.join(', ')}"
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83 def to_irc_auth_command
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96 # Returns an Irc::Auth::Comand from the receiver
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97 def to_irc_auth_command
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98 Irc::Auth::Command.new(self)
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110 # This class describes a permission set
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111 class PermissionSet
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113 # Create a new (empty) PermissionSet
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119 # Inspection simply inspects the internal hash
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124 # Sets the permission for command _cmd_ to _val_,
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126 def set_permission(str, val)
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127 cmd = str.to_irc_auth_command
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130 @perm[cmd.command] = val
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132 @perm.delete(cmd.command)
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134 raise TypeError, "#{val.inspect} must be true or false" unless [true,false].include?(val)
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138 # Resets the permission for command _cmd_
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140 def reset_permission(cmd)
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141 set_permission(cmd, nil)
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144 # Tells if command _cmd_ is permitted. We do this by returning
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145 # the value of the deepest Command#path that matches.
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148 cmd = str.to_irc_auth_command
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150 cmd.path.reverse.each { |k|
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151 if @perm.has_key?(k)
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162 # This is the basic class for bot users: they have a username, a password,
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163 # a list of netmasks to match against, and a list of permissions.
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167 attr_reader :username
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168 attr_reader :password
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169 attr_reader :netmasks
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170 attr_writer :login_by_mask
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171 attr_writer :autologin
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173 # Create a new BotUser with given username
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174 def initialize(username)
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175 @username = BotUser.sanitize_username(username)
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177 @netmasks = NetmaskList.new
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179 reset_login_by_mask
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185 str = "<#{self.class}:#{'0x%08x' % self.object_id}:"
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186 str << " @username=#{@username.inspect}"
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187 str << " @netmasks=#{@netmasks.inspect}"
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188 str << " @perm=#{@perm.inspect}"
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189 str << " @login_by_mask=#{@login_by_mask}"
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190 str << " @autologin=#{@autologin}"
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194 # Convert into a hash
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197 :username => @username,
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198 :password => @password,
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199 :netmasks => @netmasks,
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201 :login_by_mask => @login_by_mask,
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202 :autologin => @autologin
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206 # Do we allow logging in without providing the password?
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212 # Reset the login-by-mask option
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214 def reset_login_by_mask
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215 @login_by_mask = Auth.manager.bot.config['auth.login_by_mask'] unless defined?(@login_by_mask)
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218 # Reset the autologin option
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220 def reset_autologin
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221 @autologin = Auth.manager.bot.config['auth.autologin'] unless defined?(@autologin)
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224 # Do we allow automatic logging in?
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230 # Restore from hash
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232 @username = h[:username] if h.has_key?(:username)
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233 @password = h[:password] if h.has_key?(:password)
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234 @netmasks = h[:netmasks] if h.has_key?(:netmasks)
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235 @perm = h[:perm] if h.has_key?(:perm)
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236 @login_by_mask = h[:login_by_mask] if h.has_key?(:login_by_mask)
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237 @autologin = h[:autologin] if h.has_key?(:autologin)
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240 # This method sets the password if the proposed new password
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242 def password=(pwd=nil)
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245 raise InvalidPassword, "#{pwd} contains invalid characters" if pwd !~ /^[A-Za-z0-9]+$/
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246 raise InvalidPassword, "#{pwd} too short" if pwd.length < 4
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248 rescue InvalidPassword => e
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251 raise InvalidPassword, "Exception #{e.inspect} while checking #{pwd}"
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258 # Resets the password by creating a new onw
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260 @password = Auth.random_password
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263 # Sets the permission for command _cmd_ to _val_ on channel _chan_
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265 def set_permission(cmd, val, chan="*")
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266 k = chan.to_s.to_sym
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267 @perm[k] = PermissionSet.new unless @perm.has_key?(k)
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268 @perm[k].set_permission(cmd, val)
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271 # Resets the permission for command _cmd_ on channel _chan_
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273 def reset_permission(cmd, chan ="*")
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274 set_permission(cmd, nil, chan)
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277 # Checks if BotUser is allowed to do something on channel _chan_,
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278 # or on all channels if _chan_ is nil
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280 def permit?(cmd, chan=nil)
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282 k = chan.to_s.to_sym
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287 if @perm.has_key?(k)
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288 allow = @perm[k].permit?(cmd)
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295 def add_netmask(mask)
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296 @netmasks << mask.to_irc_netmask
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299 # Removes a Netmask
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301 def delete_netmask(mask)
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302 m = mask.to_irc_netmask
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303 @netmasks.delete(m)
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306 # Removes all <code>Netmask</code>s
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309 @netmasks = NetmaskList.new
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312 # This method checks if BotUser has a Netmask that matches _user_
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315 user = usr.to_irc_user
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317 @netmasks.each { |n|
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318 if user.matches?(n)
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326 # This method gets called when User _user_ wants to log in.
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327 # It returns true or false depending on whether the password
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328 # is right. If it is, the Netmask of the user is added to the
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329 # list of acceptable Netmask unless it's already matched.
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330 def login(user, password)
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331 if password == @password or (password.nil? and (@login_by_mask || @autologin) and knows?(user))
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332 add_netmask(user) unless knows?(user)
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333 debug "#{user} logged in as #{self.inspect}"
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340 # # This method gets called when User _user_ has logged out as this BotUser
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342 # delete_netmask(user) if knows?(user)
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345 # This method sanitizes a username by chomping, downcasing
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346 # and replacing any nonalphanumeric character with _
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348 def BotUser.sanitize_username(name)
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349 return name.to_s.chomp.downcase.gsub(/[^a-z0-9]/,"_")
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355 # This is the default BotUser: it's used for all users which haven't
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356 # identified with the bot
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358 class DefaultBotUserClass < BotUser
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360 private :login, :add_netmask, :delete_netmask
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364 # The default BotUser is named 'everyone'
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367 reset_login_by_mask
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370 @default_perm = PermissionSet.new
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373 # This method returns without changing anything
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375 def login_by_mask=(val)
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376 debug "Tried to change the login-by-mask for default bot user, ignoring"
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377 return @login_by_mask
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380 # The default botuser allows logins by mask
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382 def reset_login_by_mask
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383 @login_by_mask = true
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386 # This method returns without changing anything
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388 def autologin=(val)
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389 debug "Tried to change the autologin for default bot user, ignoring"
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393 # The default botuser doesn't allow autologin (meaningless)
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395 def reset_autologin
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399 # Sets the default permission for the default user (i.e. the ones
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400 # set by the BotModule writers) on all channels
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402 def set_default_permission(cmd, val)
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403 @default_perm.set_permission(Command.new(cmd), val)
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404 debug "Default permissions now:\n#{@default_perm.inspect}"
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407 # default knows everybody
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410 return true if user.to_irc_user
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413 # We always allow logging in as the default user
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414 def login(user, password)
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418 # Resets the NetmaskList
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421 add_netmask("*!*@*")
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424 # DefaultBotUser will check the default_perm after checking
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426 # or on all channels if _chan_ is nil
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428 def permit?(cmd, chan=nil)
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429 allow = super(cmd, chan)
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430 if allow.nil? && chan.nil?
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431 allow = @default_perm.permit?(cmd)
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438 # Returns the only instance of DefaultBotUserClass
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440 def Auth.defaultbotuser
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441 return DefaultBotUserClass.instance
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444 # This is the BotOwner: he can do everything
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446 class BotOwnerClass < BotUser
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451 @login_by_mask = false
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456 def permit?(cmd, chan=nil)
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462 # Returns the only instance of BotOwnerClass
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465 return BotOwnerClass.instance
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469 # This is the AuthManagerClass singleton, used to manage User/BotUser connections and
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472 class AuthManagerClass
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476 attr_reader :everyone
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477 attr_reader :botowner
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479 # The instance manages two <code>Hash</code>es: one that maps
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480 # <code>Irc::User</code>s onto <code>BotUser</code>s, and the other that maps
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481 # usernames onto <code>BotUser</code>
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483 @everyone = Auth::defaultbotuser
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484 @botowner = Auth::botowner
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488 def bot_associate(bot)
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489 raise "Cannot associate with a new bot! Save first" if defined?(@has_changes) && @has_changes
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496 # This variable is set to true when there have been changes
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497 # to the botusers list, so that we know when to save
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498 @has_changes = false
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502 @has_changes = true
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506 @has_changes = false
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513 # resets the hashes
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515 @botusers = Hash.new
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516 @allbotusers = Hash.new
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517 [everyone, botowner].each { |x|
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518 @allbotusers[x.username.to_sym] = x
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522 def load_array(ary, forced)
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523 raise "Won't load with unsaved changes" if @has_changes and not forced
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526 raise TypeError, "#{x} should be a Hash" unless x.kind_of?(Hash)
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531 get_botuser(u).from_hash(x)
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537 @allbotusers.values.map { |x|
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542 # checks if we know about a certain BotUser username
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543 def include?(botusername)
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544 @allbotusers.has_key?(botusername.to_sym)
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547 # Maps <code>Irc::User</code> to BotUser
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548 def irc_to_botuser(ircuser)
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549 logged = @botusers[ircuser.to_irc_user]
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550 return logged if logged
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551 return autologin(ircuser)
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554 # creates a new BotUser
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555 def create_botuser(name, password=nil)
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556 n = BotUser.sanitize_username(name)
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558 raise "BotUser #{n} exists" if include?(k)
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559 bu = BotUser.new(n)
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560 bu.password = password
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561 @allbotusers[k] = bu
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564 # returns the botuser with name _name_
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565 def get_botuser(name)
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566 @allbotusers.fetch(BotUser.sanitize_username(name).to_sym)
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569 # Logs Irc::User _user_ in to BotUser _botusername_ with password _pwd_
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571 # raises an error if _botusername_ is not a known BotUser username
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573 # It is possible to autologin by Netmask, on request
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575 def login(user, botusername, pwd=nil)
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576 ircuser = user.to_irc_user
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577 n = BotUser.sanitize_username(botusername)
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579 raise "No such BotUser #{n}" unless include?(k)
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580 if @botusers.has_key?(ircuser)
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581 return true if @botusers[ircuser].name = n
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583 # @botusers[ircuser].logout(ircuser)
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585 bu = @allbotusers[k]
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586 if bu.login(ircuser, pwd)
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587 @botusers[ircuser] = bu
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593 # Tries to auto-login Irc::User _user_ by looking at the known botusers that allow autologin
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594 # and trying to login without a password
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596 def autologin(user)
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597 ircuser = user.to_irc_user
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598 debug "Trying to autlogin #{ircuser}"
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599 return @botusers[ircuser] if @botusers.has_key?(ircuser)
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600 @allbotusers.each { |n, bu|
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601 debug "Checking with #{n}"
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602 return bu if bu.autologin? and login(ircuser, n)
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607 # Checks if User _user_ can do _cmd_ on _chan_.
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609 # Permission are checked in this order, until a true or false
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611 # * associated BotUser on _chan_
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612 # * associated BotUser on all channels
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613 # * everyone on _chan_
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614 # * everyone on all channels
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616 def permit?(user, cmdtxt, channel=nil)
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617 if user.class <= BotUser
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620 botuser = irc_to_botuser(user)
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622 cmd = cmdtxt.to_irc_auth_command
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634 allow = botuser.permit?(cmd, chan) if chan
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635 return allow unless allow.nil?
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636 allow = botuser.permit?(cmd)
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637 return allow unless allow.nil?
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639 unless botuser == everyone
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640 allow = everyone.permit?(cmd, chan) if chan
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641 return allow unless allow.nil?
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642 allow = everyone.permit?(cmd)
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643 return allow unless allow.nil?
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646 raise "Could not check permission for user #{user.inspect} to run #{cmdtxt.inspect} on #{chan.inspect}"
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649 # Checks if command _cmd_ is allowed to User _user_ on _chan_
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650 def allow?(cmdtxt, user, chan=nil)
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651 permit?(user, cmdtxt, chan)
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656 # Returns the only instance of AuthManagerClass
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658 def Auth.authmanager
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659 return AuthManagerClass.instance
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