Added a new filter type bineq that will create an equality filter and NOT force

convert data to UTF-8. This is required for proper binary data filters in Microsoft
Active Directory.

lib/net/ldap/filter.rb

@@ -23,7 +23,7 @@
 class Net::LDAP::Filter
   ##
   # Known filter types.
-  FilterTypes = [ :ne, :eq, :ge, :le, :and, :or, :not, :ex ]
+  FilterTypes = [ :ne, :eq, :ge, :le, :and, :or, :not, :ex, :bineq ]
 
   def initialize(op, left, right) #:nodoc:
     unless FilterTypes.include?(op)
@@ -65,6 +65,23 @@ class Net::LDAP::Filter
       new(:eq, attribute, value)
     end
 
+		##
+		# Creates a Filter object indicating a binary comparison.
+		# this prevents the search data from being forced into a UTF-8 string.
+		#
+		# This is primarily used for Microsoft Active Directory to compare
+		# GUID values.
+		#
+		#    # for guid represented as hex charecters
+		#    guid = "6a31b4a12aa27a41aca9603f27dd5116"
+		#    guid_bin = [guid].pack("H*")
+		#    f = Net::LDAP::Filter.bineq("objectGUID", guid_bin)
+		#
+		# This filter does not perform any escaping.
+		def bineq(attribute, value)
+			new(:bineq, attribute, value)
+		end
+
     ##
     # Creates a Filter object indicating extensible comparison. This Filter
     # object is currently considered EXPERIMENTAL.
@@ -399,6 +416,8 @@ class Net::LDAP::Filter
       "!(#{@left}=#{@right})"
     when :eq
       "#{@left}=#{@right}"
+		when :bineq
+			"#{@left}=#{@right}"
     when :ex
       "#{@left}:=#{@right}"
     when :ge
@@ -508,6 +527,9 @@ class Net::LDAP::Filter
       else # equality
         [@left.to_s.to_ber, unescape(@right).to_ber].to_ber_contextspecific(3)
       end
+		when :bineq
+			# make sure data is not forced to UTF-8
+			[@left.to_s.to_ber, unescape(@right).to_ber_bin].to_ber_contextspecific(3)
     when :ex
       seq = []