#
# httpauth/htdigest.rb -- Apache compatible htdigest file
#
# Author: IPR -- Internet Programming with Ruby -- writers
# Copyright (c) 2003 Internet Programming with Ruby writers. All rights
# reserved.
#
# $IPR: htdigest.rb,v 1.4 2003/07/22 19:20:45 gotoyuzo Exp $
require 'webrick/httpauth/userdb'
require 'webrick/httpauth/digestauth'
require 'tempfile'
module WEBrick
module HTTPAuth
##
# Htdigest accesses apache-compatible digest password files. Passwords are
# matched to a realm where they are valid. For security, the path for a
# digest password database should be stored outside of the paths available
# to the HTTP server.
#
# Htdigest is intended for use with WEBrick::HTTPAuth::DigestAuth and
# stores passwords using cryptographic hashes.
#
# htpasswd = WEBrick::HTTPAuth::Htdigest.new 'my_password_file'
# htpasswd.set_passwd 'my realm', 'username', 'password'
# htpasswd.flush
class Htdigest
include UserDB
##
# Open a digest password database at +path+
def initialize(path)
@path = path
@mtime = Time.at(0)
@digest = Hash.new
@mutex = Mutex::new
@auth_type = DigestAuth
open(@path,"a").close unless File::exist?(@path)
reload
end
##
# Reloads passwords from the database
def reload
mtime = File::mtime(@path)
if mtime > @mtime
@digest.clear
open(@path){|io|
while line = io.gets
line.chomp!
user, realm, pass = line.split(/:/, 3)
unless @digest[realm]
@digest[realm] = Hash.new
end
@digest[realm][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 if !tmp.closed?
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
if hash = @digest[realm]
hash[user]
end
end
##
# Sets a password in the database for +user+ in +realm+ to +pass+.
def set_passwd(realm, user, pass)
@mutex.synchronize{
unless @digest[realm]
@digest[realm] = Hash.new
end
@digest[realm][user] = make_passwd(realm, user, pass)
}
end
##
# Removes a password from the database for +user+ in +realm+.
def delete_passwd(realm, user)
if hash = @digest[realm]
hash.delete(user)
end
end
##
# Iterate passwords in the database.
def each # :yields: [user, realm, password_hash]
@digest.keys.sort.each{|realm|
hash = @digest[realm]
hash.keys.sort.each{|user|
yield([user, realm, hash[user]])
}
}
end
end
end
end
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