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108 lines
3 KiB
Ruby
108 lines
3 KiB
Ruby
#
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# httpauth/basicauth.rb -- HTTP basic access authentication
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#
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# Author: IPR -- Internet Programming with Ruby -- writers
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# Copyright (c) 2003 Internet Programming with Ruby writers. All rights
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# reserved.
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#
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# $IPR: basicauth.rb,v 1.5 2003/02/20 07:15:47 gotoyuzo Exp $
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require 'webrick/config'
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require 'webrick/httpstatus'
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require 'webrick/httpauth/authenticator'
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module WEBrick
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module HTTPAuth
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##
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# Basic Authentication for WEBrick
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#
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# Use this class to add basic authentication to a WEBrick servlet.
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#
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# Here is an example of how to set up a BasicAuth:
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#
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# config = { :Realm => 'BasicAuth example realm' }
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#
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# htpasswd = WEBrick::HTTPAuth::Htpasswd.new 'my_password_file'
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# htpasswd.set_passwd config[:Realm], 'username', 'password'
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# htpasswd.flush
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#
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# config[:UserDB] = htpasswd
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#
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# basic_auth = WEBrick::HTTPAuth::BasicAuth.new config
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class BasicAuth
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include Authenticator
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AuthScheme = "Basic"
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##
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# Used by UserDB to create a basic password entry
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def self.make_passwd(realm, user, pass)
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pass ||= ""
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pass.crypt(Utils::random_string(2))
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end
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attr_reader :realm, :userdb, :logger
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##
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# Creates a new BasicAuth instance.
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#
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# See WEBrick::Config::BasicAuth for default configuration entries
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#
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# You must supply the following configuration entries:
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#
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# :Realm:: The name of the realm being protected.
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# :UserDB:: A database of usernames and passwords.
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# A WEBrick::HTTPAuth::Htpasswd instance should be used.
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def initialize(config, default=Config::BasicAuth)
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check_init(config)
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@config = default.dup.update(config)
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end
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##
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# Authenticates a +req+ and returns a 401 Unauthorized using +res+ if
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# the authentication was not correct.
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def authenticate(req, res)
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unless basic_credentials = check_scheme(req)
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challenge(req, res)
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end
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userid, password = basic_credentials.unpack("m*")[0].split(":", 2)
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password ||= ""
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if userid.empty?
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error("user id was not given.")
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challenge(req, res)
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end
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unless encpass = @userdb.get_passwd(@realm, userid, @reload_db)
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error("%s: the user is not allowed.", userid)
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challenge(req, res)
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end
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if password.crypt(encpass) != encpass
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error("%s: password unmatch.", userid)
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challenge(req, res)
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end
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info("%s: authentication succeeded.", userid)
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req.user = userid
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end
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##
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# Returns a challenge response which asks for for authentication
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# information
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def challenge(req, res)
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res[@response_field] = "#{@auth_scheme} realm=\"#{@realm}\""
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raise @auth_exception
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end
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end
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##
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# Basic authentication for proxy servers. See BasicAuth for details.
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class ProxyBasicAuth < BasicAuth
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include ProxyAuthenticator
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end
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end
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end
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