1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
|
-- Implementation of the Lilliput-TBC tweakable block cipher by the
-- Lilliput-AE team, hereby denoted as "the implementer".
--
-- For more information, feedback or questions, refer to our website:
-- https://paclido.fr/lilliput-ae
--
-- To the extent possible under law, the implementer has waived all copyright
-- and related or neighboring rights to the source code in this file.
-- http://creativecommons.org/publicdomain/zero/1.0/
library IEEE;
library work;
use IEEE.numeric_std.all;
use IEEE.std_logic_1164.all;
use work.crypt_pack.all;
entity fsm_chiffrement is
port (
start_i : in std_logic;
clock_i : in std_logic;
reset_i : in std_logic;
decrypt_i : in std_logic;
compteur_o : out std_logic_vector(7 downto 0) ;
liliput_on_out : out std_logic;
data_out_valid_o : out std_logic;
permutation_o : out std_logic;
invert_o : out std_logic;
mux_keyschdule_o : out std_logic;
mux_chiffrement_o : out std_logic
);
end fsm_chiffrement;
architecture fsm_chiffrement_arch of fsm_chiffrement is
type state is (etat_initial,initroundkey, e_firstround, e_loopround, d_initfirst,d_initloop,d_initlast,d_firstround, d_loopround, lastround);
signal present, futur : state;
signal compteur : integer range 0 to ROUND+1;
begin
compteur_o <= std_logic_vector(to_unsigned(compteur,8));
process_0 : process(clock_i,reset_i)
begin
if reset_i = '0' then
present <= etat_initial;
compteur <= 0;
elsif clock_i'event and clock_i ='1' then
present <= futur;
if( present =d_loopround or present =d_firstround or present =d_initlast) then
compteur <= compteur -1;
elsif (present = initroundkey or present =d_initloop or present =d_initfirst or present = e_firstround or present =e_loopround ) then
compteur <= compteur+1;
else
compteur <= 0;
end if;
end if;
end process process_0;
process_1 : process(present, start_i,decrypt_i,compteur)
begin
case present is
when etat_initial =>
if start_i = '1' then
futur <= initroundkey;
else
futur <= present;
end if;
when initroundkey =>
if decrypt_i = '0' then
futur <= e_loopround;
elsif decrypt_i = '1' then
futur <= d_initloop;
end if;
when e_firstround =>
futur <= e_loopround;
when e_loopround =>
if compteur = ROUND-1 then
futur <= lastround;
else
futur <= present;
end if;
when d_initfirst =>
futur <= d_initloop;
when d_initloop =>
if compteur = ROUND-2 then
futur <= d_initlast;
else
futur <= present;
end if;
when d_initlast =>
futur <= d_firstround;
when d_firstround =>
futur <= d_loopround;
when d_loopround =>
if compteur = 0 then
futur <= lastround;
else
futur <= present;
end if;
when lastround =>
futur <= etat_initial;
end case;
end process process_1;
process_2 : process(present)
begin
case present is
when etat_initial =>
liliput_on_out <= '0';
data_out_valid_o <= '0';
permutation_o <= '0';
mux_keyschdule_o <= '1';
mux_chiffrement_o <= '1';
invert_o <= '0';
when initroundkey =>
liliput_on_out <= '0';
data_out_valid_o <= '0';
permutation_o <= '0';
mux_keyschdule_o <= '1';
mux_chiffrement_o <= '1';
invert_o <= '0';
when e_firstround =>
liliput_on_out <= '1';
data_out_valid_o <= '0';
permutation_o <= '1';
mux_keyschdule_o <= '0';
mux_chiffrement_o <= '0';
invert_o <= '0';
when e_loopround =>
liliput_on_out <= '1';
data_out_valid_o <= '0';
permutation_o <= '1';
mux_keyschdule_o <= '0';
mux_chiffrement_o <= '0';
invert_o <= '0';
when d_initfirst =>
liliput_on_out <= '0';
data_out_valid_o <= '0';
permutation_o <= '0';
mux_keyschdule_o <= '0';
mux_chiffrement_o <= '1';
invert_o <= '0';
when d_initloop =>
liliput_on_out <= '0';
data_out_valid_o <= '0';
permutation_o <= '0';
mux_keyschdule_o <= '0';
mux_chiffrement_o <= '1';
invert_o <= '0';
when d_initlast =>
liliput_on_out <= '0';
data_out_valid_o <= '0';
permutation_o <= '0';
mux_keyschdule_o <= '0';
mux_chiffrement_o <= '1';
invert_o <= '1';
when d_firstround =>
liliput_on_out <= '1';
data_out_valid_o <= '0';
permutation_o <= '1';
mux_keyschdule_o <= '0';
mux_chiffrement_o <= '0';
invert_o <= '1';
when d_loopround =>
liliput_on_out <= '1';
data_out_valid_o <= '0';
permutation_o <= '1';
mux_keyschdule_o <= '0';
mux_chiffrement_o <= '0';
invert_o <= '1';
when lastround =>
liliput_on_out <= '1';
data_out_valid_o <= '1';
permutation_o <= '0';
mux_keyschdule_o <= '0';
mux_chiffrement_o <= '0';
invert_o <= '0';
end case;
end process process_2;
end architecture fsm_chiffrement_arch;
|
