mirror of
https://github.com/henrydcase/pqc.git
synced 2024-11-22 23:48:58 +00:00
ac2c20045c
* Add McEliece reference implementations * Add Vec implementations of McEliece * Add sse implementations * Add AVX2 implementations * Get rid of stuff not supported by Mac ABI * restrict to two cores * Ditch .data files * Remove .hidden from all .S files * speed up duplicate consistency tests by batching * make cpuinfo more robust * Hope to stabilize macos cpuinfo without ccache * Revert "Hope to stabilize macos cpuinfo without ccache" This reverts commit 6129c3cabe1abbc8b956bc87e902a698e32bf322. * Just hardcode what's available at travis * Fixed-size types in api.h * namespace all header files in mceliece * Ditch operations.h * Get rid of static inline functions * fixup! Ditch operations.h
96 lines
2.2 KiB
C
96 lines
2.2 KiB
C
/*
|
|
This file is for Benes network related functions
|
|
*/
|
|
|
|
#include "benes.h"
|
|
|
|
#include "params.h"
|
|
#include "transpose.h"
|
|
#include "util.h"
|
|
|
|
/* one layer of the benes network */
|
|
static void layer(uint64_t *data, uint64_t *bits, int lgs) {
|
|
int i, j, s;
|
|
|
|
uint64_t d;
|
|
|
|
s = 1 << lgs;
|
|
|
|
for (i = 0; i < 64; i += s * 2) {
|
|
for (j = i; j < i + s; j++) {
|
|
|
|
d = (data[j + 0] ^ data[j + s]);
|
|
d &= (*bits++);
|
|
data[j + 0] ^= d;
|
|
data[j + s] ^= d;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* input: r, sequence of bits to be permuted */
|
|
/* bits, condition bits of the Benes network */
|
|
/* rev, 0 for normal application; !0 for inverse */
|
|
/* output: r, permuted bits */
|
|
void PQCLEAN_MCELIECE348864F_VEC_benes(uint64_t *r, const unsigned char *bits, int rev) {
|
|
int i;
|
|
|
|
const unsigned char *cond_ptr;
|
|
int inc, low;
|
|
|
|
uint64_t cond[64];
|
|
|
|
//
|
|
|
|
if (rev == 0) {
|
|
inc = 256;
|
|
cond_ptr = bits;
|
|
} else {
|
|
inc = -256;
|
|
cond_ptr = bits + (2 * GFBITS - 2) * 256;
|
|
}
|
|
|
|
//
|
|
|
|
PQCLEAN_MCELIECE348864F_VEC_transpose_64x64(r, r);
|
|
|
|
for (low = 0; low <= 5; low++) {
|
|
for (i = 0; i < 64; i++) {
|
|
cond[i] = PQCLEAN_MCELIECE348864F_VEC_load4(cond_ptr + i * 4);
|
|
}
|
|
PQCLEAN_MCELIECE348864F_VEC_transpose_64x64(cond, cond);
|
|
layer(r, cond, low);
|
|
cond_ptr += inc;
|
|
}
|
|
|
|
PQCLEAN_MCELIECE348864F_VEC_transpose_64x64(r, r);
|
|
|
|
for (low = 0; low <= 5; low++) {
|
|
for (i = 0; i < 32; i++) {
|
|
cond[i] = PQCLEAN_MCELIECE348864F_VEC_load8(cond_ptr + i * 8);
|
|
}
|
|
layer(r, cond, low);
|
|
cond_ptr += inc;
|
|
}
|
|
for (low = 4; low >= 0; low--) {
|
|
for (i = 0; i < 32; i++) {
|
|
cond[i] = PQCLEAN_MCELIECE348864F_VEC_load8(cond_ptr + i * 8);
|
|
}
|
|
layer(r, cond, low);
|
|
cond_ptr += inc;
|
|
}
|
|
|
|
PQCLEAN_MCELIECE348864F_VEC_transpose_64x64(r, r);
|
|
|
|
for (low = 5; low >= 0; low--) {
|
|
for (i = 0; i < 64; i++) {
|
|
cond[i] = PQCLEAN_MCELIECE348864F_VEC_load4(cond_ptr + i * 4);
|
|
}
|
|
PQCLEAN_MCELIECE348864F_VEC_transpose_64x64(cond, cond);
|
|
layer(r, cond, low);
|
|
cond_ptr += inc;
|
|
}
|
|
|
|
PQCLEAN_MCELIECE348864F_VEC_transpose_64x64(r, r);
|
|
}
|
|
|