replaced run method with encrypt and decrypt method

README

@@ -24,7 +24,7 @@ Then, build a new <tt>RubyDES::Ctx</tt> object and supply the data and key block
 
 Finally, let it rip.
 
-  encrypted_data = des.run(:encrypt)
+  encrypted_data = des.encrypt
 
 You will then be returned a DES encrypted block that is completely secure against eavesdropping 
 (if it were still 1997).
@@ -36,7 +36,7 @@ fashion as before.
 
 And run the DES with the key schedule reversed.
 
-  decrypted_data = un_des.run(:decrypt)
+  decrypted_data = un_des.decrypt
 
 You can then check to see if it all worked.
 

lib/ruby-des.rb

@@ -36,6 +36,16 @@ def initialize(data, key)
       @key  = key
     end
 
+    def encrypt
+      self.run(:encrypt)
+    end
+
+    def decrypt
+      self.run(:decrypt)
+    end
+
+    protected
+
     def run(operation)
       l = [] # l[0] is the IP_1_L permutation of the data block, l[1..16] are the results of each round of encryption.
       r = [] # r[0] is the IP_1_R permutation of the data block, r[1..16] are the results of each round of encryption.

test/ctx_test.rb

@@ -9,11 +9,11 @@ def setup
   end
 
   def test_run
-    encrypted = RubyDES::Ctx.new(@data, @key).run(:encrypt)
+    encrypted = RubyDES::Ctx.new(@data, @key).encrypt
 
     assert_equal ctx(:encrypted_bit_array), encrypted.bit_array
 
-    decrypted = RubyDES::Ctx.new(encrypted, @key).run(:decrypt)
+    decrypted = RubyDES::Ctx.new(encrypted, @key).decrypt
 
     assert_equal ctx(:decrypted_bit_array), decrypted.bit_array
   end