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lowmc.c
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lowmc.c
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/*
* This file is part of the optimized implementation of the Picnic signature scheme.
* See the accompanying documentation for complete details.
*
* The code is provided under the MIT license, see LICENSE for
* more details.
* SPDX-License-Identifier: MIT
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include "io.h"
#include "lowmc.h"
#include "mzd_additional.h"
#if defined(WITH_KKW)
#include "bitstream.h"
#include "picnic3_impl.h"
#include "picnic3_types.h"
#endif
#if defined(WITH_OPT)
#include "simd.h"
#endif
#if !defined(_MSC_VER)
#include <stdalign.h>
#endif
#include <string.h>
#include <assert.h>
#if defined(WITH_LOWMC_128_128_20)
#include "lowmc_128_128_20.h"
#endif
#if defined(WITH_LOWMC_129_129_4)
#include "lowmc_129_129_4.h"
#endif
#if defined(WITH_LOWMC_192_192_4)
#include "lowmc_192_192_4.h"
#endif
#if defined(WITH_LOWMC_192_192_30)
#include "lowmc_192_192_30.h"
#endif
#if defined(WITH_LOWMC_256_256_38)
#include "lowmc_256_256_38.h"
#endif
#if defined(WITH_LOWMC_255_255_4)
#include "lowmc_255_255_4.h"
#endif
// clang-format off
#if defined(WITH_LOWMC_128_128_20) || defined(WITH_LOWMC_192_192_30) || defined(WITH_LOWMC_256_256_38)
// clang-format on
/* S-box for m = 10 */
static inline uint64_t sbox_layer_10_bitsliced_uint64(uint64_t in) {
// a, b, c
const uint64_t x0s = (in & MASK_X0I) << 2;
const uint64_t x1s = (in & MASK_X1I) << 1;
const uint64_t x2m = in & MASK_X2I;
// (b & c) ^ a
const uint64_t t0 = (x1s & x2m) ^ x0s;
// (c & a) ^ a ^ b
const uint64_t t1 = (x0s & x2m) ^ x0s ^ x1s;
// (a & b) ^ a ^ b ^c
const uint64_t t2 = (x0s & x1s) ^ x0s ^ x1s ^ x2m;
return (in & MASK_MASK) ^ (t0 >> 2) ^ (t1 >> 1) ^ t2;
}
/* S-box for m = 10 */
static inline void sbox_layer_10_uint64(uint64_t* d) {
*d = sbox_layer_10_bitsliced_uint64(*d);
}
#endif
#if !defined(NO_UINT64_FALLBACK)
#if defined(WITH_LOWMC_129_129_4)
/**
* S-box for m = 43
*/
static void sbox_uint64_lowmc_129_129_4(mzd_local_t* in) {
mzd_local_t x0m[1], x1m[1], x2m[1];
// a
mzd_and_uint64_192(x0m, mask_129_129_43_a, in);
// b
mzd_and_uint64_192(x1m, mask_129_129_43_b, in);
// c
mzd_and_uint64_192(x2m, mask_129_129_43_c, in);
mzd_shift_left_uint64_192(x0m, x0m, 2);
mzd_shift_left_uint64_192(x1m, x1m, 1);
mzd_local_t t0[1], t1[1], t2[1];
// b & c
mzd_and_uint64_192(t0, x1m, x2m);
// c & a
mzd_and_uint64_192(t1, x0m, x2m);
// a & b
mzd_and_uint64_192(t2, x0m, x1m);
// (b & c) ^ a
mzd_xor_uint64_192(t0, t0, x0m);
// (c & a) ^ a ^ b
mzd_xor_uint64_192(t1, t1, x0m);
mzd_xor_uint64_192(t1, t1, x1m);
// (a & b) ^ a ^ b ^c
mzd_xor_uint64_192(t2, t2, x0m);
mzd_xor_uint64_192(t2, t2, x1m);
mzd_xor_uint64_192(t2, t2, x2m);
mzd_shift_right_uint64_192(t0, t0, 2);
mzd_shift_right_uint64_192(t1, t1, 1);
mzd_xor_uint64_192(t2, t2, t1);
mzd_xor_uint64_192(in, t2, t0);
}
#endif
#if defined(WITH_LOWMC_192_192_4)
/**
* S-box for m = 64
*/
static void sbox_uint64_lowmc_192_192_4(mzd_local_t* in) {
mzd_local_t x0m[1], x1m[1], x2m[1];
// a
mzd_and_uint64_192(x0m, mask_192_192_64_a, in);
// b
mzd_and_uint64_192(x1m, mask_192_192_64_b, in);
// c
mzd_and_uint64_192(x2m, mask_192_192_64_c, in);
mzd_shift_left_uint64_192(x0m, x0m, 2);
mzd_shift_left_uint64_192(x1m, x1m, 1);
mzd_local_t t0[1], t1[1], t2[1];
// b & c
mzd_and_uint64_192(t0, x1m, x2m);
// c & a
mzd_and_uint64_192(t1, x0m, x2m);
// a & b
mzd_and_uint64_192(t2, x0m, x1m);
// (b & c) ^ a
mzd_xor_uint64_192(t0, t0, x0m);
// (c & a) ^ a ^ b
mzd_xor_uint64_192(t1, t1, x0m);
mzd_xor_uint64_192(t1, t1, x1m);
// (a & b) ^ a ^ b ^c
mzd_xor_uint64_192(t2, t2, x0m);
mzd_xor_uint64_192(t2, t2, x1m);
mzd_xor_uint64_192(t2, t2, x2m);
mzd_shift_right_uint64_192(t0, t0, 2);
mzd_shift_right_uint64_192(t1, t1, 1);
mzd_xor_uint64_192(t2, t2, t1);
mzd_xor_uint64_192(in, t2, t0);
}
#endif
#if defined(WITH_LOWMC_255_255_4)
/**
* S-box for m = 85
*/
static void sbox_uint64_lowmc_255_255_4(mzd_local_t* in) {
mzd_local_t x0m[1], x1m[1], x2m[1];
// a
mzd_and_uint64_256(x0m, mask_255_255_85_a, in);
// b
mzd_and_uint64_256(x1m, mask_255_255_85_b, in);
// c
mzd_and_uint64_256(x2m, mask_255_255_85_c, in);
mzd_shift_left_uint64_256(x0m, x0m, 2);
mzd_shift_left_uint64_256(x1m, x1m, 1);
mzd_local_t t0[1], t1[1], t2[1];
// b & c
mzd_and_uint64_256(t0, x1m, x2m);
// c & a
mzd_and_uint64_256(t1, x0m, x2m);
// a & b
mzd_and_uint64_256(t2, x0m, x1m);
// (b & c) ^ a
mzd_xor_uint64_256(t0, t0, x0m);
// (c & a) ^ a ^ b
mzd_xor_uint64_256(t1, t1, x0m);
mzd_xor_uint64_256(t1, t1, x1m);
// (a & b) ^ a ^ b ^c
mzd_xor_uint64_256(t2, t2, x0m);
mzd_xor_uint64_256(t2, t2, x1m);
mzd_xor_uint64_256(t2, t2, x2m);
mzd_shift_right_uint64_256(t0, t0, 2);
mzd_shift_right_uint64_256(t1, t1, 1);
mzd_xor_uint64_256(t2, t2, t1);
mzd_xor_uint64_256(in, t2, t0);
}
#endif
#endif /* NO_UINT_FALLBACK */
#if defined(WITH_OPT)
#if defined(WITH_SSE2) || defined(WITH_NEON)
ATTR_TARGET_S128
static inline void sbox_s128_full(mzd_local_t* in, const mzd_local_t* mask_a,
const mzd_local_t* mask_b, const mzd_local_t* mask_c) {
word128 inm[2] = {mm128_load(&in->w64[0]), mm128_load(&in->w64[2])};
word128 x0m[2] = {mm128_load(&mask_a->w64[0]), mm128_load(&mask_a->w64[2])};
word128 x1m[2] = {mm128_load(&mask_b->w64[0]), mm128_load(&mask_b->w64[2])};
word128 x2m[2] = {mm128_load(&mask_c->w64[0]), mm128_load(&mask_c->w64[2])};
mm128_and_256(x0m, inm, x0m);
mm128_and_256(x1m, inm, x1m);
mm128_and_256(x2m, inm, x2m);
mm128_shift_left_256(x0m, x0m, 2);
mm128_shift_left_256(x1m, x1m, 1);
word128 t0[2], t1[2], t2[2];
mm128_and_256(t0, x1m, x2m);
mm128_and_256(t1, x0m, x2m);
mm128_and_256(t2, x0m, x1m);
mm128_xor_256(t0, t0, x0m);
mm128_xor_256(x0m, x0m, x1m);
mm128_xor_256(t1, t1, x0m);
mm128_xor_256(t2, t2, x0m);
mm128_xor_256(t2, t2, x2m);
mm128_shift_right_256(t0, t0, 2);
mm128_shift_right_256(t1, t1, 1);
mm128_xor_256(t0, t0, t1);
mm128_xor_256(inm, t0, t2);
mm128_store(&in->w64[0], inm[0]);
mm128_store(&in->w64[2], inm[1]);
}
#if defined(WITH_LOWMC_129_129_4)
ATTR_TARGET_S128
static inline void sbox_s128_lowmc_129_129_4(mzd_local_t* in) {
sbox_s128_full(in, mask_129_129_43_a, mask_129_129_43_b, mask_129_129_43_c);
}
#endif
#if defined(WITH_LOWMC_192_192_4)
ATTR_TARGET_S128
static inline void sbox_s128_lowmc_192_192_4(mzd_local_t* in) {
sbox_s128_full(in, mask_192_192_64_a, mask_192_192_64_b, mask_192_192_64_c);
}
#endif
#if defined(WITH_LOWMC_255_255_4)
ATTR_TARGET_S128
static inline void sbox_s128_lowmc_255_255_4(mzd_local_t* in) {
sbox_s128_full(in, mask_255_255_85_a, mask_255_255_85_b, mask_255_255_85_c);
}
#endif
#endif
#if defined(WITH_AVX2)
ATTR_TARGET_AVX2
static inline void sbox_s256_lowmc_full(mzd_local_t* in, const word256 mask_a, const word256 mask_b,
const word256 mask_c) {
const word256 min = mm256_load(in);
// a
word256 x0m = mm256_and(min, mask_a);
// b
word256 x1m = mm256_and(min, mask_b);
// c
word256 x2m = mm256_and(min, mask_c);
x0m = mm256_rotate_left(x0m, 2);
x1m = mm256_rotate_left(x1m, 1);
// b & c
word256 t0 = mm256_and(x1m, x2m);
// a & c
word256 t1 = mm256_and(x0m, x2m);
// a & b
word256 t2 = mm256_and(x0m, x1m);
// (b & c) ^ a
t0 = mm256_xor(t0, x0m);
// a ^ b
x0m = mm256_xor(x0m, x1m);
// a ^ b ^ (a & c)
t1 = mm256_xor(t1, x0m);
// a ^ b ^ c ^ (a & b)
t2 = mm256_xor(mm256_xor(t2, x0m), x2m);
t0 = mm256_rotate_right(t0, 2);
t1 = mm256_rotate_right(t1, 1);
mm256_store(in, mm256_xor(mm256_xor(t0, t1), t2));
}
#if defined(WITH_LOWMC_129_129_4)
ATTR_TARGET_AVX2
static inline void sbox_s256_lowmc_129_129_4(mzd_local_t* in) {
sbox_s256_lowmc_full(in,
mm256_set_4(MASK_129_129_43_A_0, MASK_129_129_43_A_1, MASK_129_129_43_A_2,
MASK_129_129_43_A_3),
mm256_set_4(MASK_129_129_43_B_0, MASK_129_129_43_B_1, MASK_129_129_43_B_2,
MASK_129_129_43_B_3),
mm256_set_4(MASK_129_129_43_C_0, MASK_129_129_43_C_1, MASK_129_129_43_C_2,
MASK_129_129_43_C_3));
}
#endif
#if defined(WITH_LOWMC_192_192_4)
ATTR_TARGET_AVX2
static inline void sbox_s256_lowmc_192_192_4(mzd_local_t* in) {
sbox_s256_lowmc_full(in,
mm256_set_4(MASK_192_192_64_A_0, MASK_192_192_64_A_1, MASK_192_192_64_A_2,
MASK_192_192_64_A_3),
mm256_set_4(MASK_192_192_64_B_0, MASK_192_192_64_B_1, MASK_192_192_64_B_2,
MASK_192_192_64_B_3),
mm256_set_4(MASK_192_192_64_C_0, MASK_192_192_64_C_1, MASK_192_192_64_C_2,
MASK_192_192_64_C_3));
}
#endif
#if defined(WITH_LOWMC_255_255_4)
ATTR_TARGET_AVX2
static inline void sbox_s256_lowmc_255_255_4(mzd_local_t* in) {
sbox_s256_lowmc_full(in,
mm256_set_4(MASK_255_255_85_A_0, MASK_255_255_85_A_1, MASK_255_255_85_A_2,
MASK_255_255_85_A_3),
mm256_set_4(MASK_255_255_85_B_0, MASK_255_255_85_B_1, MASK_255_255_85_B_2,
MASK_255_255_85_B_3),
mm256_set_4(MASK_255_255_85_C_0, MASK_255_255_85_C_1, MASK_255_255_85_C_2,
MASK_255_255_85_C_3));
}
#endif
#endif /* WITH_AVX2 */
#endif /* WITH_OPT */
#if defined(WITH_KKW)
#if !defined(NO_UINT64_FALLBACK)
#define picnic3_aux_sbox_bitsliced(LOWMC_N, XOR, AND, SHL, SHR, bitmask_a, bitmask_b, bitmask_c) \
do { \
mzd_local_t a[1], b[1], c[1]; \
/* a */ \
AND(a, bitmask_a, statein); \
/* b */ \
AND(b, bitmask_b, statein); \
/* c */ \
AND(c, bitmask_c, statein); \
\
SHL(a, a, 2); \
SHL(b, b, 1); \
mzd_local_t d[1], e[1], f[1]; \
/* a */ \
AND(d, bitmask_a, stateout); \
/* b */ \
AND(e, bitmask_b, stateout); \
/* c */ \
AND(f, bitmask_c, stateout); \
\
SHL(d, d, 2); \
SHL(e, e, 1); \
\
mzd_local_t fresh_output_ab[1], fresh_output_bc[1], fresh_output_ca[1]; \
XOR(fresh_output_ab, a, b); \
XOR(fresh_output_ca, e, fresh_output_ab); \
XOR(fresh_output_bc, d, a); \
XOR(fresh_output_ab, fresh_output_ab, c); \
XOR(fresh_output_ab, fresh_output_ab, f); \
\
mzd_local_t t0[1], t1[1], t2[1], aux[1]; \
SHR(t2, fresh_output_ca, 2); \
SHR(t1, fresh_output_bc, 1); \
XOR(t2, t2, t1); \
XOR(aux, t2, fresh_output_ab); \
/* a & b */ \
AND(t0, a, b); \
/* b & c */ \
AND(t1, b, c); \
/* c & a */ \
AND(t2, c, a); \
SHR(t2, t2, 2); \
SHR(t1, t1, 1); \
XOR(t2, t2, t1); \
XOR(t2, t2, t0); \
XOR(aux, aux, t2); \
\
bitstream_t parity_tape = {{tapes->parity_tapes}, tapes->pos}; \
bitstream_t last_party_tape = {{tapes->tape[15]}, tapes->pos}; \
\
/* calculate aux_bits to fix and_helper */ \
mzd_from_bitstream(&parity_tape, t0, (LOWMC_N + 63) / (sizeof(uint64_t) * 8), LOWMC_N); \
XOR(aux, aux, t0); \
mzd_from_bitstream(&last_party_tape, t1, (LOWMC_N + 63) / (sizeof(uint64_t) * 8), LOWMC_N); \
XOR(aux, aux, t1); \
\
last_party_tape.position = tapes->pos; \
mzd_to_bitstream(&last_party_tape, aux, (LOWMC_N + 63) / (sizeof(uint64_t) * 8), LOWMC_N); \
bitstream_t aux_tape = {{tapes->aux_bits}, tapes->aux_pos}; \
mzd_to_bitstream(&aux_tape, aux, (LOWMC_N + 63) / (sizeof(uint64_t) * 8), LOWMC_N); \
\
tapes->aux_pos += LOWMC_N; \
} while (0)
#if defined(WITH_LOWMC_129_129_4)
static void sbox_aux_uint64_lowmc_129_129_4(mzd_local_t* statein, mzd_local_t* stateout,
randomTape_t* tapes) {
picnic3_aux_sbox_bitsliced(LOWMC_129_129_4_N, mzd_xor_uint64_192, mzd_and_uint64_192,
mzd_shift_left_uint64_192, mzd_shift_right_uint64_192,
mask_129_129_43_a, mask_129_129_43_b, mask_129_129_43_c);
}
#endif
#if defined(WITH_LOWMC_192_192_4)
static void sbox_aux_uint64_lowmc_192_192_4(mzd_local_t* statein, mzd_local_t* stateout,
randomTape_t* tapes) {
picnic3_aux_sbox_bitsliced(LOWMC_192_192_4_N, mzd_xor_uint64_192, mzd_and_uint64_192,
mzd_shift_left_uint64_192, mzd_shift_right_uint64_192,
mask_192_192_64_a, mask_192_192_64_b, mask_192_192_64_c);
}
#endif
#if defined(WITH_LOWMC_255_255_4)
static void sbox_aux_uint64_lowmc_255_255_4(mzd_local_t* statein, mzd_local_t* stateout,
randomTape_t* tapes) {
picnic3_aux_sbox_bitsliced(LOWMC_255_255_4_N, mzd_xor_uint64_256, mzd_and_uint64_256,
mzd_shift_left_uint64_256, mzd_shift_right_uint64_256,
mask_255_255_85_a, mask_255_255_85_b, mask_255_255_85_c);
}
#endif
#endif /* !NO_UINT64_FALLBACK */
#endif /* WITH_KKW */
#if !defined(NO_UINT64_FALLBACK)
// uint64 based implementation
#define IMPL uint64
#include "lowmc_129_129_4_fns_uint64.h"
#include "lowmc.c.i"
#include "lowmc_192_192_4_fns_uint64.h"
#include "lowmc.c.i"
#include "lowmc_255_255_4_fns_uint64.h"
#include "lowmc.c.i"
#include "lowmc_128_128_20_fns_uint64.h"
#include "lowmc.c.i"
#include "lowmc_192_192_30_fns_uint64.h"
#include "lowmc.c.i"
#include "lowmc_256_256_38_fns_uint64.h"
#include "lowmc.c.i"
#endif
#if defined(WITH_OPT)
#if defined(WITH_SSE2) || defined(WITH_NEON)
#define FN_ATTR ATTR_TARGET_S128
#undef IMPL
#define IMPL s128
#if defined(WITH_KKW)
#define picnic3_aux_sbox_bitsliced_mm128(LOWMC_N, XOR, AND, SHL, SHR, bitmask_a, bitmask_b, \
bitmask_c) \
do { \
word128 bita[2] = {mm128_load(&bitmask_a->w64[0]), mm128_load(&bitmask_a->w64[2])}; \
word128 bitb[2] = {mm128_load(&bitmask_b->w64[0]), mm128_load(&bitmask_b->w64[2])}; \
word128 bitc[2] = {mm128_load(&bitmask_c->w64[0]), mm128_load(&bitmask_c->w64[2])}; \
\
word128 aux[2] = {mm128_load(&statein->w64[0]), mm128_load(&statein->w64[2])}; \
\
word128 a[2]; \
word128 b[2]; \
word128 c[2]; \
/* a */ \
AND(a, bita, aux); \
/* b */ \
AND(b, bitb, aux); \
/* c */ \
AND(c, bitc, aux); \
\
SHL(a, a, 2); \
SHL(b, b, 1); \
\
aux[0] = mm128_load(&stateout->w64[0]); \
aux[1] = mm128_load(&stateout->w64[2]); \
word128 d[2]; \
word128 e[2]; \
word128 f[2]; \
/* a */ \
AND(d, bita, aux); \
/* b */ \
AND(e, bitb, aux); \
/* c */ \
AND(f, bitc, aux); \
\
SHL(d, d, 2); \
SHL(e, e, 1); \
\
word128 fresh_output_ab[2]; \
word128 fresh_output_bc[2]; \
word128 fresh_output_ca[2]; \
XOR(fresh_output_ab, a, b); \
XOR(fresh_output_ca, e, fresh_output_ab); \
XOR(fresh_output_bc, d, a); \
XOR(fresh_output_ab, fresh_output_ab, c); \
XOR(fresh_output_ab, fresh_output_ab, f); \
\
word128 t0[2]; \
word128 t1[2]; \
word128 t2[2]; \
SHR(t2, fresh_output_ca, 2); \
SHR(t1, fresh_output_bc, 1); \
XOR(t2, t2, t1); \
XOR(aux, t2, fresh_output_ab); \
\
/* a & b */ \
AND(t0, a, b); \
/* b & c */ \
AND(t1, b, c); \
/* c & a */ \
AND(t2, c, a); \
SHR(t2, t2, 2); \
SHR(t1, t1, 1); \
XOR(t2, t2, t1); \
XOR(t2, t2, t0); \
XOR(aux, aux, t2); \
\
bitstream_t parity_tape = {{tapes->parity_tapes}, tapes->pos}; \
bitstream_t last_party_tape = {{tapes->tape[15]}, tapes->pos}; \
\
/* calculate aux_bits to fix and_helper */ \
w128_from_bitstream(&parity_tape, t0, (LOWMC_N + 63) / (sizeof(uint64_t) * 8), LOWMC_N); \
XOR(aux, aux, t0); \
w128_from_bitstream(&last_party_tape, t1, (LOWMC_N + 63) / (sizeof(uint64_t) * 8), LOWMC_N); \
XOR(aux, aux, t1); \
\
last_party_tape.position = tapes->pos; \
w128_to_bitstream(&last_party_tape, aux, (LOWMC_N + 63) / (sizeof(uint64_t) * 8), LOWMC_N); \
bitstream_t aux_tape = {{tapes->aux_bits}, tapes->aux_pos}; \
w128_to_bitstream(&aux_tape, aux, (LOWMC_N + 63) / (sizeof(uint64_t) * 8), LOWMC_N); \
\
tapes->aux_pos += LOWMC_N; \
} while (0)
#if defined(WITH_LOWMC_129_129_4)
ATTR_TARGET_S128
static void sbox_aux_s128_lowmc_129_129_4(mzd_local_t* statein, mzd_local_t* stateout,
randomTape_t* tapes) {
picnic3_aux_sbox_bitsliced_mm128(LOWMC_129_129_4_N, mm128_xor_256, mm128_and_256,
mm128_shift_left_256, mm128_shift_right_256, mask_129_129_43_a,
mask_129_129_43_b, mask_129_129_43_c);
}
#endif
#if defined(WITH_LOWMC_192_192_4)
ATTR_TARGET_S128
static void sbox_aux_s128_lowmc_192_192_4(mzd_local_t* statein, mzd_local_t* stateout,
randomTape_t* tapes) {
picnic3_aux_sbox_bitsliced_mm128(LOWMC_192_192_4_N, mm128_xor_256, mm128_and_256,
mm128_shift_left_256, mm128_shift_right_256, mask_192_192_64_a,
mask_192_192_64_b, mask_192_192_64_c);
}
#endif
#if defined(WITH_LOWMC_255_255_4)
ATTR_TARGET_S128
static void sbox_aux_s128_lowmc_255_255_4(mzd_local_t* statein, mzd_local_t* stateout,
randomTape_t* tapes) {
picnic3_aux_sbox_bitsliced_mm128(LOWMC_255_255_4_N, mm128_xor_256, mm128_and_256,
mm128_shift_left_256, mm128_shift_right_256, mask_255_255_85_a,
mask_255_255_85_b, mask_255_255_85_c);
}
#endif
#endif
#include "lowmc_129_129_4_fns_s128.h"
#include "lowmc.c.i"
#include "lowmc_192_192_4_fns_s128.h"
#include "lowmc.c.i"
#include "lowmc_255_255_4_fns_s128.h"
#include "lowmc.c.i"
#include "lowmc_128_128_20_fns_s128.h"
#include "lowmc.c.i"
#include "lowmc_192_192_30_fns_s128.h"
#include "lowmc.c.i"
#include "lowmc_256_256_38_fns_s128.h"
#include "lowmc.c.i"
#endif
#if defined(WITH_AVX2)
#undef FN_ATTR
#define FN_ATTR ATTR_TARGET_AVX2
#undef IMPL
#define IMPL s256
#if defined(WITH_KKW)
#define picnic3_aux_sbox_bitsliced_mm256(LOWMC_N, bitmask_a, bitmask_b, bitmask_c) \
do { \
const word256 bita = bitmask_a, bitb = bitmask_b, bitc = bitmask_c; \
word256 aux = mm256_load(statein->w64); \
/* a */ \
word256 a = mm256_and(bita, aux); \
/* b */ \
word256 b = mm256_and(bitb, aux); \
/* c */ \
word256 c = mm256_and(bitc, aux); \
\
a = mm256_rotate_left(a, 2); \
b = mm256_rotate_left(b, 1); \
\
aux = mm256_load(stateout->w64); \
/* d */ \
word256 d = mm256_and(bita, aux); \
/* e */ \
word256 e = mm256_and(bitb, aux); \
/* f */ \
word256 f = mm256_and(bitc, aux); \
\
d = mm256_rotate_left(d, 2); \
e = mm256_rotate_left(e, 1); \
\
word256 fresh_output_ab = mm256_xor(a, b); \
word256 fresh_output_ca = mm256_xor(e, fresh_output_ab); \
word256 fresh_output_bc = mm256_xor(d, a); \
fresh_output_ab = mm256_xor(fresh_output_ab, mm256_xor(c, f)); \
\
word256 t2 = mm256_rotate_right(fresh_output_ca, 2); \
word256 t1 = mm256_rotate_right(fresh_output_bc, 1); \
t2 = mm256_xor(t2, t1); \
aux = mm256_xor(t2, fresh_output_ab); \
\
/* a & b */ \
word256 t0 = mm256_and(a, b); \
/* b & c */ \
t1 = mm256_and(b, c); \
/* c & a */ \
t2 = mm256_and(c, a); \
t2 = mm256_rotate_right(t2, 2); \
t1 = mm256_rotate_right(t1, 1); \
aux = mm256_xor(mm256_xor(aux, t2), mm256_xor(t0, t1)); \
\
bitstream_t parity_tape = {{tapes->parity_tapes}, tapes->pos}; \
bitstream_t last_party_tape = {{tapes->tape[15]}, tapes->pos}; \
\
/* calculate aux_bits to fix and_helper */ \
t0 = w256_from_bitstream(&parity_tape, (LOWMC_N + 63) / (sizeof(uint64_t) * 8), LOWMC_N); \
t1 = w256_from_bitstream(&last_party_tape, (LOWMC_N + 63) / (sizeof(uint64_t) * 8), LOWMC_N); \
aux = mm256_xor(aux, mm256_xor(t0, t1)); \
\
last_party_tape.position = tapes->pos; \
w256_to_bitstream(&last_party_tape, aux, (LOWMC_N + 63) / (sizeof(uint64_t) * 8), LOWMC_N); \
bitstream_t aux_tape = {{tapes->aux_bits}, tapes->aux_pos}; \
w256_to_bitstream(&aux_tape, aux, (LOWMC_N + 63) / (sizeof(uint64_t) * 8), LOWMC_N); \
\
tapes->aux_pos += LOWMC_N; \
} while (0)
#if defined(WITH_LOWMC_129_129_4)
ATTR_TARGET_AVX2
static void sbox_aux_s256_lowmc_129_129_4(mzd_local_t* statein, mzd_local_t* stateout,
randomTape_t* tapes) {
picnic3_aux_sbox_bitsliced_mm256(LOWMC_129_129_4_N,
mm256_set_4(MASK_129_129_43_A_0, MASK_129_129_43_A_1,
MASK_129_129_43_A_2, MASK_129_129_43_A_3),
mm256_set_4(MASK_129_129_43_B_0, MASK_129_129_43_B_1,
MASK_129_129_43_B_2, MASK_129_129_43_B_3),
mm256_set_4(MASK_129_129_43_C_0, MASK_129_129_43_C_1,
MASK_129_129_43_C_2, MASK_129_129_43_C_3));
}
#endif
#if defined(WITH_LOWMC_192_192_4)
ATTR_TARGET_AVX2
static void sbox_aux_s256_lowmc_192_192_4(mzd_local_t* statein, mzd_local_t* stateout,
randomTape_t* tapes) {
picnic3_aux_sbox_bitsliced_mm256(LOWMC_192_192_4_N,
mm256_set_4(MASK_192_192_64_A_0, MASK_192_192_64_A_1,
MASK_192_192_64_A_2, MASK_192_192_64_A_3),
mm256_set_4(MASK_192_192_64_B_0, MASK_192_192_64_B_1,
MASK_192_192_64_B_2, MASK_192_192_64_B_3),
mm256_set_4(MASK_192_192_64_C_0, MASK_192_192_64_C_1,
MASK_192_192_64_C_2, MASK_192_192_64_C_3));
}
#endif
#if defined(WITH_LOWMC_255_255_4)
ATTR_TARGET_AVX2
static void sbox_aux_s256_lowmc_255_255_4(mzd_local_t* statein, mzd_local_t* stateout,
randomTape_t* tapes) {
picnic3_aux_sbox_bitsliced_mm256(LOWMC_255_255_4_N,
mm256_set_4(MASK_255_255_85_A_0, MASK_255_255_85_A_1,
MASK_255_255_85_A_2, MASK_255_255_85_A_3),
mm256_set_4(MASK_255_255_85_B_0, MASK_255_255_85_B_1,
MASK_255_255_85_B_2, MASK_255_255_85_B_3),
mm256_set_4(MASK_255_255_85_C_0, MASK_255_255_85_C_1,
MASK_255_255_85_C_2, MASK_255_255_85_C_3));
}
#endif
#endif
#include "lowmc_129_129_4_fns_s256.h"
#include "lowmc.c.i"
#include "lowmc_192_192_4_fns_s256.h"
#include "lowmc.c.i"
#include "lowmc_255_255_4_fns_s256.h"
#include "lowmc.c.i"
#include "lowmc_128_128_20_fns_s256.h"
#include "lowmc.c.i"
#include "lowmc_192_192_30_fns_s256.h"
#include "lowmc.c.i"
#include "lowmc_256_256_38_fns_s256.h"
#include "lowmc.c.i"
#endif
#endif
void lowmc_compute(const lowmc_parameters_t* lowmc, const lowmc_key_t* key, const mzd_local_t* x,
mzd_local_t* y) {
const uint32_t lowmc_id = lowmc_get_id(lowmc);
#if defined(WITH_OPT)
#if defined(WITH_AVX2)
/* AVX2 enabled instances */
if (CPU_SUPPORTS_AVX2) {
switch (lowmc_id) {
#if defined(WITH_ZKBPP)
/* Instances with partial Sbox layer */
#if defined(WITH_LOWMC_128_128_20)
case LOWMC_ID(128, 10):
lowmc_s256_lowmc_128_128_20(key, x, y);
return;
#endif
#if defined(WITH_LOWMC_192_192_30)
case LOWMC_ID(192, 10):
lowmc_s256_lowmc_192_192_30(key, x, y);
return;
#endif
#if defined(WITH_LOWMC_256_256_38)
case LOWMC_ID(256, 10):
lowmc_s256_lowmc_256_256_38(key, x, y);
return;
#endif
#endif
/* Instances with full Sbox layer */
#if defined(WITH_LOWMC_129_129_4)
case LOWMC_ID(129, 43):
lowmc_s256_lowmc_129_129_4(key, x, y);
return;
#endif
#if defined(WITH_LOWMC_192_192_4)
case LOWMC_ID(192, 64):
lowmc_s256_lowmc_192_192_4(key, x, y);
return;
#endif
#if defined(WITH_LOWMC_255_255_4)
case LOWMC_ID(255, 85):
lowmc_s256_lowmc_255_255_4(key, x, y);
return;
#endif
}
}
#endif
#if defined(WITH_SSE2) || defined(WITH_NEON)
/* SSE2/NEON enabled instances */
if (CPU_SUPPORTS_SSE2 || CPU_SUPPORTS_NEON) {
switch (lowmc_id) {
#if defined(WITH_ZKBPP)
/* Instances with partial Sbox layer */
#if defined(WITH_LOWMC_128_128_20)
case LOWMC_ID(128, 10):
lowmc_s128_lowmc_128_128_20(key, x, y);
return;
#endif
#if defined(WITH_LOWMC_192_192_30)
case LOWMC_ID(192, 10):
lowmc_s128_lowmc_192_192_30(key, x, y);
return;
#endif
#if defined(WITH_LOWMC_256_256_38)
case LOWMC_ID(256, 10):
lowmc_s128_lowmc_256_256_38(key, x, y);
return;
#endif
#endif
/* Instances with full Sbox layer */
#if defined(WITH_LOWMC_129_129_4)
case LOWMC_ID(129, 43):
lowmc_s128_lowmc_129_129_4(key, x, y);
return;
#endif
#if defined(WITH_LOWMC_192_192_4)
case LOWMC_ID(192, 64):
lowmc_s128_lowmc_192_192_4(key, x, y);
return;
#endif
#if defined(WITH_LOWMC_255_255_4)
case LOWMC_ID(255, 85):
lowmc_s128_lowmc_255_255_4(key, x, y);
return;
#endif
}
}
#endif
#endif
#if !defined(NO_UINT64_FALLBACK)
/* uint64_t implementations */
switch (lowmc_id) {
#if defined(WITH_ZKBPP)
/* Instances with partial Sbox layer */
#if defined(WITH_LOWMC_128_128_20)
case LOWMC_ID(128, 10):
lowmc_uint64_lowmc_128_128_20(key, x, y);
return;
#endif
#if defined(WITH_LOWMC_192_192_30)
case LOWMC_ID(192, 10):
lowmc_uint64_lowmc_192_192_30(key, x, y);
return;
#endif
#if defined(WITH_LOWMC_256_256_38)
case LOWMC_ID(256, 10):
lowmc_uint64_lowmc_256_256_38(key, x, y);
return;
#endif
#endif
/* Instances with full Sbox layer */
#if defined(WITH_LOWMC_129_129_4)
case LOWMC_ID(129, 43):
lowmc_uint64_lowmc_129_129_4(key, x, y);
return;
#endif
#if defined(WITH_LOWMC_192_192_4)
case LOWMC_ID(192, 64):
lowmc_uint64_lowmc_192_192_4(key, x, y);
return;
#endif
#if defined(WITH_LOWMC_255_255_4)
case LOWMC_ID(255, 85):
lowmc_uint64_lowmc_255_255_4(key, x, y);
return;
#endif
}
#endif
UNREACHABLE;
}
#if defined(PICNIC_STATIC)
// This function is only used by the LowMC benchmark.
lowmc_implementation_f lowmc_get_implementation(const lowmc_parameters_t* lowmc) {
const uint32_t lowmc_id = lowmc_get_id(lowmc);
#if defined(WITH_OPT)
#if defined(WITH_AVX2)
/* AVX2 enabled instances */
if (CPU_SUPPORTS_AVX2) {
switch (lowmc_id) {
#if defined(WITH_ZKBPP)
/* Instances with partial Sbox layer */
#if defined(WITH_LOWMC_128_128_20)
case LOWMC_ID(128, 10):
return lowmc_s256_lowmc_128_128_20;
#endif
#if defined(WITH_LOWMC_192_192_30)
case LOWMC_ID(192, 10):
return lowmc_s256_lowmc_192_192_30;
#endif
#if defined(WITH_LOWMC_256_256_38)
case LOWMC_ID(256, 10):
return lowmc_s256_lowmc_256_256_38;
#endif
#endif
/* Instances with full Sbox layer */
#if defined(WITH_LOWMC_129_129_4)
case LOWMC_ID(129, 43):
return lowmc_s256_lowmc_129_129_4;
#endif
#if defined(WITH_LOWMC_192_192_4)
case LOWMC_ID(192, 64):
return lowmc_s256_lowmc_192_192_4;
#endif
#if defined(WITH_LOWMC_255_255_4)
case LOWMC_ID(255, 85):
return lowmc_s256_lowmc_255_255_4;
#endif
}
}
#endif
#if defined(WITH_SSE2) || defined(WITH_NEON)
/* SSE2/NEON enabled instances */
if (CPU_SUPPORTS_SSE2 || CPU_SUPPORTS_NEON) {
switch (lowmc_id) {
#if defined(WITH_ZKBPP)
/* Instances with partial Sbox layer */
#if defined(WITH_LOWMC_128_128_20)
case LOWMC_ID(128, 10):
return lowmc_s128_lowmc_128_128_20;
#endif
#if defined(WITH_LOWMC_192_192_30)
case LOWMC_ID(192, 10):
return lowmc_s128_lowmc_192_192_30;
#endif
#if defined(WITH_LOWMC_256_256_38)
case LOWMC_ID(256, 10):
return lowmc_s128_lowmc_256_256_38;
#endif
#endif
/* Instances with full Sbox layer */
#if defined(WITH_LOWMC_129_129_4)
case LOWMC_ID(129, 43):
return lowmc_s128_lowmc_129_129_4;
#endif
#if defined(WITH_LOWMC_192_192_4)
case LOWMC_ID(192, 64):
return lowmc_s128_lowmc_192_192_4;
#endif
#if defined(WITH_LOWMC_255_255_4)
case LOWMC_ID(255, 85):
return lowmc_s128_lowmc_255_255_4;
#endif
}
}
#endif
#endif
#if !defined(NO_UINT64_FALLBACK)
/* uint64_t implementations */
switch (lowmc_id) {
#if defined(WITH_ZKBPP)
/* Instances with partial Sbox layer */
#if defined(WITH_LOWMC_128_128_20)
case LOWMC_ID(128, 10):
return lowmc_uint64_lowmc_128_128_20;
#endif
#if defined(WITH_LOWMC_192_192_30)
case LOWMC_ID(192, 10):
return lowmc_uint64_lowmc_192_192_30;
#endif
#if defined(WITH_LOWMC_256_256_38)
case LOWMC_ID(256, 10):
return lowmc_uint64_lowmc_256_256_38;
#endif
#endif
/* Instances with full Sbox layer */
#if defined(WITH_LOWMC_129_129_4)
case LOWMC_ID(129, 43):
return lowmc_uint64_lowmc_129_129_4;
#endif
#if defined(WITH_LOWMC_192_192_4)
case LOWMC_ID(192, 64):
return lowmc_uint64_lowmc_192_192_4;
#endif
#if defined(WITH_LOWMC_255_255_4)
case LOWMC_ID(255, 85):
return lowmc_uint64_lowmc_255_255_4;
#endif
}
#endif
UNREACHABLE;
return NULL;
}
#endif
#if defined(WITH_ZKBPP)
void lowmc_record_state(const lowmc_parameters_t* lowmc, const lowmc_key_t* key,
const mzd_local_t* x, recorded_state_t* state) {
const uint32_t lowmc_id = lowmc_get_id(lowmc);
#if defined(WITH_OPT)
#if defined(WITH_AVX2)
/* AVX2 enabled instances */
if (CPU_SUPPORTS_AVX2) {
switch (lowmc_id) {
/* Instances with partial Sbox layer */
#if defined(WITH_LOWMC_128_128_20)
case LOWMC_ID(128, 10):
lowmc_store_s256_lowmc_128_128_20(key, x, state);
return;
#endif
#if defined(WITH_LOWMC_192_192_30)
case LOWMC_ID(192, 10):
lowmc_store_s256_lowmc_192_192_30(key, x, state);
return;