X-Git-Url: https://www.irasnyder.com/gitweb/?p=aes.git;a=blobdiff_plain;f=aes.hpp;h=5d2acd8346c505490ad48c43cbd83e5d9fc39b53;hp=43808d4433c6f048b8ab67c185ec6d5948740db5;hb=f06d505218bd3f8c05e9c64f0705bfa3066f665c;hpb=4bfbc559f6d8e186f8b95b48ae9603ee32dbb17d

diff --git a/aes.hpp b/aes.hpp
index 43808d4..5d2acd8 100644
--- a/aes.hpp
+++ b/aes.hpp
@@ -29,9 +29,21 @@ class AES
 		byteArray decrypt (const byteArray& ciphertext) const;
 
 	private:
-		unsigned int Nb;
-		unsigned int Nk;
-		unsigned int Nr;
+		/* Block size in words -- Always constant in AES.
+		 *
+		 * We also might as well make this static and share it between
+		 * all instances of AES. */
+		static const unsigned int Nb = 4;
+
+		/* Key size in words -- can be 4, 6, or 8.
+		 *
+		 * Once it is set by the constructor, it will never change */
+		const unsigned int Nk;
+
+		/* Number of rounds -- depends on key size.
+		 *
+		 * Once it is set by the constructor, it will never change */
+		const unsigned int Nr;
 
 		wordArray keySchedule;