lib/crypto: Remove xor cipher on Text.

It could be counter intuitive because of unicode. Explicitly casting to `Bytes`
first will be clearer.

Signed-off-by: Philippe Pepos Petitclerc <ppeposp@gmail.com>

diff --git a/lib/crypto.nit b/lib/crypto.nit
index e258af7..2abe5d7 100644 (file)
--- a/lib/crypto.nit
+++ b/lib/crypto.nit
@@ -154,33 +154,6 @@ redef class Text
                end
                return arr.to_s
        end
-
-       # Returns `self` xored with `key`
-       #
-       # The shortest of the two is cycled through until the longest has been
-       # completely xored.
-       #
-       #     assert "goodmorning".xor(" ".to_bytes) == "GOODMORNING"
-       fun xor(key: SequenceRead[Byte]): Text do
-               var xored = new Bytes.with_capacity(bytelen.max(key.length))
-
-               var shortest: SequenceRead[Byte]
-               var longest: SequenceRead[Byte]
-
-               if key.length > self.length then
-                       shortest = self.to_bytes
-                       longest = key
-               else
-                       shortest = key
-                       longest = self.to_bytes
-               end
-
-               for i in longest.length.times do
-                       xored.add(longest[i] ^ shortest[i % shortest.length])
-               end
-
-               return xored.to_s
-       end
 end
 
 redef class Bytes