From d522f00fa80c91da25aff834f446c285e4654e7b Mon Sep 17 00:00:00 2001
From: Kévin Le Gouguec <kevin.legouguec@airbus.com>
Date: Tue, 26 Mar 2019 15:20:53 +0100
Subject: [implem-vhdl] Déplacement dans SOUMISSION_NIST
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---
 src/add_vhdltbc/encrypt/sbox.vhd | 82 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 82 insertions(+)
 create mode 100644 src/add_vhdltbc/encrypt/sbox.vhd

(limited to 'src/add_vhdltbc/encrypt/sbox.vhd')

diff --git a/src/add_vhdltbc/encrypt/sbox.vhd b/src/add_vhdltbc/encrypt/sbox.vhd
new file mode 100644
index 0000000..7eee9d8
--- /dev/null
+++ b/src/add_vhdltbc/encrypt/sbox.vhd
@@ -0,0 +1,82 @@
+library IEEE;
+library work;
+use IEEE.std_logic_1164.all;
+use work.crypt_pack.all;
+
+entity sbox is
+  port(
+    sbox_i  : in  bit8;
+    sbox_o : out bit8
+    );
+end sbox;
+
+
+
+architecture sbox_arch of sbox is
+
+component inner_sbox_a
+	port (
+    sbox_i  : in  std_logic_vector(3 downto 0);
+    sbox_o 	: out std_logic_vector(3 downto 0)
+	);
+end component;
+
+component inner_sbox_b
+	port (
+    sbox_i  : in  std_logic_vector(3 downto 0);
+    sbox_o 	: out std_logic_vector(3 downto 0)
+	);
+end component;
+
+component inner_sbox_c
+	port (
+    sbox_i  : in  std_logic_vector(3 downto 0);
+    sbox_o 	: out std_logic_vector(3 downto 0)
+	);
+end component;
+
+signal a,a1,b,b1,c : std_logic_vector(3 downto 0);
+
+begin
+
+inner_sbox_a_t : inner_sbox_a
+port map( 
+    sbox_i => sbox_i(3 downto 0),
+    sbox_o =>  a
+);
+
+a1 <= a xor sbox_i(7 downto 4);
+
+inner_sbox_b_t : inner_sbox_b
+port map( 
+    sbox_i => a1,
+    sbox_o => b
+);
+
+b1 <= b xor sbox_i(3 downto 0);
+
+inner_sbox_c_t : inner_sbox_c
+port map( 
+    sbox_i => b1,
+    sbox_o => c
+);
+          
+sbox_o(7 downto 4) <= c xor a1;
+sbox_o (3 downto 0) <= b1;
+			 
+end sbox_arch;
+
+configuration sbox_conf of sbox is 
+	for sbox_arch
+		for  inner_sbox_a_t : inner_sbox_a
+			use entity work.inner_sbox_a( inner_sbox_a_arch );
+		end for;
+		for  inner_sbox_b_t : inner_sbox_b
+			use entity work.inner_sbox_b( inner_sbox_b_arch );
+		end for;
+		for  inner_sbox_c_t : inner_sbox_c
+			use entity work.inner_sbox_c( inner_sbox_c_arch );
+		end for;
+	end for;
+end configuration sbox_conf ;
+
-- 
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