1*0957b409SSimon J. Gerraty /*
2*0957b409SSimon J. Gerraty * Copyright (c) 2016 Thomas Pornin <pornin@bolet.org>
3*0957b409SSimon J. Gerraty *
4*0957b409SSimon J. Gerraty * Permission is hereby granted, free of charge, to any person obtaining
5*0957b409SSimon J. Gerraty * a copy of this software and associated documentation files (the
6*0957b409SSimon J. Gerraty * "Software"), to deal in the Software without restriction, including
7*0957b409SSimon J. Gerraty * without limitation the rights to use, copy, modify, merge, publish,
8*0957b409SSimon J. Gerraty * distribute, sublicense, and/or sell copies of the Software, and to
9*0957b409SSimon J. Gerraty * permit persons to whom the Software is furnished to do so, subject to
10*0957b409SSimon J. Gerraty * the following conditions:
11*0957b409SSimon J. Gerraty *
12*0957b409SSimon J. Gerraty * The above copyright notice and this permission notice shall be
13*0957b409SSimon J. Gerraty * included in all copies or substantial portions of the Software.
14*0957b409SSimon J. Gerraty *
15*0957b409SSimon J. Gerraty * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
16*0957b409SSimon J. Gerraty * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
17*0957b409SSimon J. Gerraty * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
18*0957b409SSimon J. Gerraty * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
19*0957b409SSimon J. Gerraty * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
20*0957b409SSimon J. Gerraty * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
21*0957b409SSimon J. Gerraty * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
22*0957b409SSimon J. Gerraty * SOFTWARE.
23*0957b409SSimon J. Gerraty */
24*0957b409SSimon J. Gerraty
25*0957b409SSimon J. Gerraty #include "inner.h"
26*0957b409SSimon J. Gerraty
27*0957b409SSimon J. Gerraty static inline void
add_round_key(uint32_t * q,const uint32_t * sk)28*0957b409SSimon J. Gerraty add_round_key(uint32_t *q, const uint32_t *sk)
29*0957b409SSimon J. Gerraty {
30*0957b409SSimon J. Gerraty q[0] ^= sk[0];
31*0957b409SSimon J. Gerraty q[1] ^= sk[1];
32*0957b409SSimon J. Gerraty q[2] ^= sk[2];
33*0957b409SSimon J. Gerraty q[3] ^= sk[3];
34*0957b409SSimon J. Gerraty q[4] ^= sk[4];
35*0957b409SSimon J. Gerraty q[5] ^= sk[5];
36*0957b409SSimon J. Gerraty q[6] ^= sk[6];
37*0957b409SSimon J. Gerraty q[7] ^= sk[7];
38*0957b409SSimon J. Gerraty }
39*0957b409SSimon J. Gerraty
40*0957b409SSimon J. Gerraty static inline void
shift_rows(uint32_t * q)41*0957b409SSimon J. Gerraty shift_rows(uint32_t *q)
42*0957b409SSimon J. Gerraty {
43*0957b409SSimon J. Gerraty int i;
44*0957b409SSimon J. Gerraty
45*0957b409SSimon J. Gerraty for (i = 0; i < 8; i ++) {
46*0957b409SSimon J. Gerraty uint32_t x;
47*0957b409SSimon J. Gerraty
48*0957b409SSimon J. Gerraty x = q[i];
49*0957b409SSimon J. Gerraty q[i] = (x & 0x000000FF)
50*0957b409SSimon J. Gerraty | ((x & 0x0000FC00) >> 2) | ((x & 0x00000300) << 6)
51*0957b409SSimon J. Gerraty | ((x & 0x00F00000) >> 4) | ((x & 0x000F0000) << 4)
52*0957b409SSimon J. Gerraty | ((x & 0xC0000000) >> 6) | ((x & 0x3F000000) << 2);
53*0957b409SSimon J. Gerraty }
54*0957b409SSimon J. Gerraty }
55*0957b409SSimon J. Gerraty
56*0957b409SSimon J. Gerraty static inline uint32_t
rotr16(uint32_t x)57*0957b409SSimon J. Gerraty rotr16(uint32_t x)
58*0957b409SSimon J. Gerraty {
59*0957b409SSimon J. Gerraty return (x << 16) | (x >> 16);
60*0957b409SSimon J. Gerraty }
61*0957b409SSimon J. Gerraty
62*0957b409SSimon J. Gerraty static inline void
mix_columns(uint32_t * q)63*0957b409SSimon J. Gerraty mix_columns(uint32_t *q)
64*0957b409SSimon J. Gerraty {
65*0957b409SSimon J. Gerraty uint32_t q0, q1, q2, q3, q4, q5, q6, q7;
66*0957b409SSimon J. Gerraty uint32_t r0, r1, r2, r3, r4, r5, r6, r7;
67*0957b409SSimon J. Gerraty
68*0957b409SSimon J. Gerraty q0 = q[0];
69*0957b409SSimon J. Gerraty q1 = q[1];
70*0957b409SSimon J. Gerraty q2 = q[2];
71*0957b409SSimon J. Gerraty q3 = q[3];
72*0957b409SSimon J. Gerraty q4 = q[4];
73*0957b409SSimon J. Gerraty q5 = q[5];
74*0957b409SSimon J. Gerraty q6 = q[6];
75*0957b409SSimon J. Gerraty q7 = q[7];
76*0957b409SSimon J. Gerraty r0 = (q0 >> 8) | (q0 << 24);
77*0957b409SSimon J. Gerraty r1 = (q1 >> 8) | (q1 << 24);
78*0957b409SSimon J. Gerraty r2 = (q2 >> 8) | (q2 << 24);
79*0957b409SSimon J. Gerraty r3 = (q3 >> 8) | (q3 << 24);
80*0957b409SSimon J. Gerraty r4 = (q4 >> 8) | (q4 << 24);
81*0957b409SSimon J. Gerraty r5 = (q5 >> 8) | (q5 << 24);
82*0957b409SSimon J. Gerraty r6 = (q6 >> 8) | (q6 << 24);
83*0957b409SSimon J. Gerraty r7 = (q7 >> 8) | (q7 << 24);
84*0957b409SSimon J. Gerraty
85*0957b409SSimon J. Gerraty q[0] = q7 ^ r7 ^ r0 ^ rotr16(q0 ^ r0);
86*0957b409SSimon J. Gerraty q[1] = q0 ^ r0 ^ q7 ^ r7 ^ r1 ^ rotr16(q1 ^ r1);
87*0957b409SSimon J. Gerraty q[2] = q1 ^ r1 ^ r2 ^ rotr16(q2 ^ r2);
88*0957b409SSimon J. Gerraty q[3] = q2 ^ r2 ^ q7 ^ r7 ^ r3 ^ rotr16(q3 ^ r3);
89*0957b409SSimon J. Gerraty q[4] = q3 ^ r3 ^ q7 ^ r7 ^ r4 ^ rotr16(q4 ^ r4);
90*0957b409SSimon J. Gerraty q[5] = q4 ^ r4 ^ r5 ^ rotr16(q5 ^ r5);
91*0957b409SSimon J. Gerraty q[6] = q5 ^ r5 ^ r6 ^ rotr16(q6 ^ r6);
92*0957b409SSimon J. Gerraty q[7] = q6 ^ r6 ^ r7 ^ rotr16(q7 ^ r7);
93*0957b409SSimon J. Gerraty }
94*0957b409SSimon J. Gerraty
95*0957b409SSimon J. Gerraty /* see inner.h */
96*0957b409SSimon J. Gerraty void
br_aes_ct_bitslice_encrypt(unsigned num_rounds,const uint32_t * skey,uint32_t * q)97*0957b409SSimon J. Gerraty br_aes_ct_bitslice_encrypt(unsigned num_rounds,
98*0957b409SSimon J. Gerraty const uint32_t *skey, uint32_t *q)
99*0957b409SSimon J. Gerraty {
100*0957b409SSimon J. Gerraty unsigned u;
101*0957b409SSimon J. Gerraty
102*0957b409SSimon J. Gerraty add_round_key(q, skey);
103*0957b409SSimon J. Gerraty for (u = 1; u < num_rounds; u ++) {
104*0957b409SSimon J. Gerraty br_aes_ct_bitslice_Sbox(q);
105*0957b409SSimon J. Gerraty shift_rows(q);
106*0957b409SSimon J. Gerraty mix_columns(q);
107*0957b409SSimon J. Gerraty add_round_key(q, skey + (u << 3));
108*0957b409SSimon J. Gerraty }
109*0957b409SSimon J. Gerraty br_aes_ct_bitslice_Sbox(q);
110*0957b409SSimon J. Gerraty shift_rows(q);
111*0957b409SSimon J. Gerraty add_round_key(q, skey + (num_rounds << 3));
112*0957b409SSimon J. Gerraty }
113