Make sure entries are 8-bit

lib/rex/zip/archive.rb

@@ -65,7 +65,7 @@ class Archive
 	# Compress this archive and return the resulting zip file as a String.
 	#
 	def pack
-		ret = ''
+		ret = ''.unpack("C*").pack("C*")
 
 		# save the offests
 		offsets = []

lib/rex/zip/entry.rb

@@ -14,8 +14,8 @@ class Entry
 	attr_reader :data
 
 	def initialize(fname, data, compmeth, timestamp=nil, attrs=nil, xtra=nil, comment=nil)
-		@name = fname
-		@data = data
+		@name = fname.unpack("C*").pack("C*")
+		@data = data.unpack("C*").pack("C*")
 		@xtra = xtra
 		@xtra ||= ''
 		@comment = comment
@@ -37,7 +37,7 @@ class Entry
 	end
 
 	def data=(val)
-		@data = val
+		@data = val.unpack("C*").pack("C*")
 		compress
 	end
 
@@ -84,11 +84,9 @@ class Entry
 	# Return the compressed data in a format suitable for adding to an Archive
 	#
 	def pack
-		ret = ''
-
 		#  - lfh 1
 		lfh = LocalFileHdr.new(self)
-		ret << lfh.pack
+		ret = lfh.pack
 
 		#  - data 1
 		if (@compdata)