Add bin and edit workflow

bin/gems/webrick-1.9.1/lib/webrick/httpauth/basicauth.rb

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