arcfour.rb in prawn-1.1.0

- old
+ new

@@ -1,5 +1,7 @@
+# encoding: utf-8
+
 # Implementation of the "ARCFOUR" algorithm ("alleged RC4 (tm)"). Implemented
 # as described at:
 # http://www.mozilla.org/projects/security/pki/nss/draft-kaukonen-cipher-arcfour-03.txt
 #
 # "RC4" is a trademark of RSA Data Security, Inc.
@@ -15,11 +17,11 @@
     key = key.unpack('c*') if key.is_a?(String)
 
     # 1. Allocate an 256 element array of 8 bit bytes to be used as an S-box
     # 2. Initialize the S-box.  Fill each entry first with it's index
     @sbox = (0..255).to_a
-    
+
     # 3. Fill another array of the same size (256) with the key, repeating
     #    bytes as necessary.
     s2 = []
     while s2.length < 256
       s2 += key
@@ -37,10 +39,10 @@
   end
 
   def encrypt(string)
     string.unpack('c*').map{|byte| byte ^ key_byte}.pack('c*')
   end
-  
+
   private
 
   # Produces the next byte of key material in the stream (3.2 Stream Generation)
   def key_byte
     @i = (@i + 1) % 256