ruby-net-ldap/lib/net/ldap/psw.rb

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# Copyright (C) 2006 by Francis Cianfrocca. All Rights Reserved.
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require 'digest/sha1'
require 'digest/md5'

module Net
  class LDAP
    class Password
      class << self
        # Generate a password-hash suitable for inclusion in an LDAP
        # attribute. Pass a hash type (currently supported: :md5 and :sha)
        # and a plaintext password. This function will return a hashed
        # representation.
        #
        # STUB: This is here to fulfill the requirements of an RFC, which
        # one?
        #
        # TODO, gotta do salted-sha and (maybe) salted-md5.
        # Should we provide sha1 as a synonym for sha1? I vote no because
        # then should you also provide ssha1 for symmetry?
        def generate(type, str)
          digest, digest_name = case type
                                when :md5
                                  [Digest::MD5.new, 'MD5']
                                when :sha
                                  [Digest::SHA1.new, 'SHA']
                                else
                                  raise Net::LDAP::LdapError.new("unsupported password-hash type (#{type})")
                                end

          digest << str.to_s
          return "{#{digest_name}}#{[digest.digest].pack('m').chomp }"
        end
      end
    end
  end 
end