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# frozen_string_literal: false
#
# httpauth/htpasswd -- Apache compatible htpasswd file
#
# Author: IPR -- Internet Programming with Ruby -- writers
# Copyright (c) 2003 Internet Programming with Ruby writers. All rights
# reserved.
#
# $IPR: htpasswd.rb,v 1.4 2003/07/22 19:20:45 gotoyuzo Exp $
require_relative 'userdb'
require_relative 'basicauth'
require 'tempfile'
module WEBrick
module HTTPAuth
##
# Htpasswd accesses apache-compatible password files. Passwords are
# matched to a realm where they are valid. For security, the path for a
# password database should be stored outside of the paths available to the
# HTTP server.
#
# Htpasswd is intended for use with WEBrick::HTTPAuth::BasicAuth.
#
# To create an Htpasswd database with a single user:
#
# htpasswd = WEBrick::HTTPAuth::Htpasswd.new 'my_password_file'
# htpasswd.set_passwd 'my realm', 'username', 'password'
# htpasswd.flush
class Htpasswd
include UserDB
##
# Open a password database at +path+
def initialize(path, password_hash: nil)
@path = path
@mtime = Time.at(0)
@passwd = Hash.new
@auth_type = BasicAuth
@password_hash = password_hash
case @password_hash
when nil
# begin
# require "string/crypt"
# rescue LoadError
# warn("Unable to load string/crypt, proceeding with deprecated use of String#crypt, consider using password_hash: :bcrypt")
# end
@password_hash = :crypt
when :crypt
# require "string/crypt"
when :bcrypt
require "bcrypt"
else
raise ArgumentError, "only :crypt and :bcrypt are supported for password_hash keyword argument"
end
File.open(@path,"a").close unless File.exist?(@path)
reload
end
##
# Reload passwords from the database
def reload
mtime = File::mtime(@path)
if mtime > @mtime
@passwd.clear
File.open(@path){|io|
while line = io.gets
line.chomp!
case line
when %r!\A[^:]+:[a-zA-Z0-9./]{13}\z!
if @password_hash == :bcrypt
raise StandardError, ".htpasswd file contains crypt password, only bcrypt passwords supported"
end
user, pass = line.split(":")
when %r!\A[^:]+:\$2[aby]\$\d{2}\$.{53}\z!
if @password_hash == :crypt
raise StandardError, ".htpasswd file contains bcrypt password, only crypt passwords supported"
end
user, pass = line.split(":")
when /:\$/, /:{SHA}/
raise NotImplementedError,
'MD5, SHA1 .htpasswd file not supported'
else
raise StandardError, 'bad .htpasswd file'
end
@passwd[user] = pass
end
}
@mtime = mtime
end
end
##
# Flush the password database. If +output+ is given the database will
# be written there instead of to the original path.
def flush(output=nil)
output ||= @path
tmp = Tempfile.create("htpasswd", File::dirname(output))
renamed = false
begin
each{|item| tmp.puts(item.join(":")) }
tmp.close
File::rename(tmp.path, output)
renamed = true
ensure
tmp.close
File.unlink(tmp.path) if !renamed
end
end
##
# Retrieves a password from the database for +user+ in +realm+. If
# +reload_db+ is true the database will be reloaded first.
def get_passwd(realm, user, reload_db)
reload() if reload_db
@passwd[user]
end
##
# Sets a password in the database for +user+ in +realm+ to +pass+.
def set_passwd(realm, user, pass)
if @password_hash == :bcrypt
# Cost of 5 to match Apache default, and because the
# bcrypt default of 10 will introduce significant delays
# for every request.
@passwd[user] = BCrypt::Password.create(pass, :cost=>5)
else
@passwd[user] = make_passwd(realm, user, pass)
end
end
##
# Removes a password from the database for +user+ in +realm+.
def delete_passwd(realm, user)
@passwd.delete(user)
end
##
# Iterate passwords in the database.
def each # :yields: [user, password]
@passwd.keys.sort.each{|user|
yield([user, @passwd[user]])
}
end
end
end
end
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