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preprocessMatrices.c
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preprocessMatrices.c
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/*! @file preprocessMatrices.c
* @brief Utility program to generate lookup tables used for fast
* matrix multiplication. It outputs precomputed data to the data
* directory.
*
* This file is part of the reference implementation of the Picnic and Fish
* signature schemes, described in the paper:
*
* Post-Quantum Zero-Knowledge and Signatures from Symmetric-Key Primitives
* Melissa Chase and David Derler and Steven Goldfeder and Claudio Orlandi and
* Sebastian Ramacher and Christian Rechberger and Daniel Slamanig and Greg
* Zaverucha
* Cryptology ePrint Archive: Report 2017/279
* http://eprint.iacr.org/2017/279
*
* The code is provided under the MIT license, see LICENSE for
* more details.
*
*/
#include <stdlib.h>
#include <stdint.h>
#include <stdio.h>
#include <string.h>
#include "matrices_256_10_38.h"
#include "matrices_256_42_14.h"
#include "matrices_256_1_316.h"
#include "LowMCConstants.h"
#include "LowMC.h"
#include "picnic.h"
#include <graycode.h>
#define t 8
/* Function in picnic.c not exposed in picnic.h */
int picnicParamsToLowMCParams(picnic_params_t picnicParams, lowmcparams_t* lowmcParams);
static code* grayCode;
void xor (uint32_t * in1, uint32_t * in2, uint32_t * out, uint32_t numWords) {
for (uint32_t i = 0; i < numWords; i++) {
out[i] = in1[i] ^ in2[i];
}
}
void rotate(uint32_t input[STATE_SIZE_BITS][STATE_SIZE_WORDS],
uint32_t output[STATE_SIZE_BITS][STATE_SIZE_WORDS])
{
for (int i = 0; i < STATE_SIZE_BITS; i++) {
for (int j = 0; j < STATE_SIZE_BITS; j++) {
setBitInWordArray(output[STATE_SIZE_BITS - 1 - i], STATE_SIZE_BITS - 1 - j,
getBitFromWordArray(input[j], i));
}
}
}
void generateTable(size_t numRounds, size_t stateBits, size_t stateWords,
uint32_t matrices[numRounds][stateBits][stateWords],
const char* matrixName, FILE* fp, FILE* fp2)
{
int* ord = malloc((1 << t) * sizeof(int));
int* inc = malloc((1 << t) * sizeof(int));
m4ri_build_code(ord, inc, t);
uint32_t rotatedMat[stateBits][stateWords];
uint32_t**** lookupTable = malloc(numRounds * sizeof(uint32_t * **));
for (int i = 0; i < numRounds; i++) {
lookupTable[i] = malloc(stateBits / t * sizeof(uint32_t * *));
for (int j = 0; j < stateBits / t; j++) {
lookupTable[i][j] = malloc((1 << t) * sizeof(uint32_t*));
for (int k = 0; k < (1 << t); k++) {
lookupTable[i][j][k] = calloc(stateWords, sizeof(uint32_t));
}
}
}
for (int i = 0; i < numRounds; i++) {
rotate(matrices[i], rotatedMat);
for (int j = 0; j < stateBits / t; j++) {
memset(lookupTable[i][j][0], 0, stateWords * sizeof(uint32_t));
for (int k = 1; k < 1 << t; k++) {
xor (lookupTable[i][(stateBits / t) - 1 - j][ord[k - 1]],
rotatedMat[(j * t) + (inc[k - 1])],
lookupTable[i][(stateBits / t) - 1 - j][ord[k]],
stateWords);
}
}
}
for (int i = 0; i < numRounds; i++) {
for (int j = 0; j < stateBits / t; j++) {
for (int k = 0; k < (1 << t); k++) {
fwrite(lookupTable[i][j][k], sizeof(uint32_t), stateWords, fp);
}
}
}
int i, j, k, l;
fprintf(fp2, "uint32_t %sLookupTable2 [%zd][%zd][%d][%zd] = {", matrixName,
numRounds, stateBits / t, 1 << t, stateWords);
for (i = 0; i < numRounds; i++) {
fprintf(fp2, "{");
for (j = 0; j < stateBits / t; j++) {
fprintf(fp2, "{");
for (k = 0; k < (1 << t); k++) {
fprintf(fp2, "{");
for (l = 0; l < stateWords; l++) {
fprintf(fp2, "0x%x", lookupTable[i][j][k][l]);
if (l != stateWords - 1) {
fprintf(fp2, ",");
}
}
fprintf(fp2, "}");
if (k != (1 << t) - 1) {
fprintf(fp2, ", \n");
}
}
fprintf(fp2, "}");
if (j != (stateBits / t) - 1) {
fprintf(fp2, ", \n");
}
}
fprintf(fp2, "}");
if (i != numRounds - 1) {
fprintf(fp2, ", \n");
}
}
fprintf(fp2, "};\n");
for (int i = 0; i < numRounds; i++) {
for (int j = 0; j < stateBits / t; j++) {
for (int k = 0; k < (1 << t); k++) {
free(lookupTable[i][j][k]);
}
free(lookupTable[i][j]);
}
free(lookupTable[i]);
}
free(lookupTable);
}
void writeRoundConstants(size_t numRounds, size_t stateWords, uint32_t roundConstants[numRounds][stateWords], FILE* fp)
{
for (int i = 0; i < numRounds; i++) {
//for(int j = 0; j < stateWords;j++) {
fwrite(&roundConstants[i], sizeof(uint32_t), stateWords, fp);
}
//}
}
void generatelookupTables(picnic_params_t picnic_params)
{
lowmcparams_t params = { 0 };
picnicParamsToLowMCParams(picnic_params, ¶ms);
FILE * fp;
char filename[100];
sprintf(filename, "data/lookupTables_%d_%d_%d.bin", params.stateSizeBits, params.numSboxes, params.numRounds);
char filename2[100];
sprintf(filename2, "data/lookupTables_%d_%d_%d.h", params.stateSizeBits, params.numSboxes, params.numRounds);
fp = fopen(filename, "wb");
FILE * fp2;
fp2 = fopen(filename2, "w+");
if (fp == NULL || fp2 == NULL) {
printf("Failed to open '%s' or '%s' for writing\n", filename, filename2);
exit(-1);
}
switch (picnic_params) {
case LowMC_256_256_42_14_FS:
// fall through
case LowMC_256_256_42_14_UR:
generateTable(params.numRounds, params.stateSizeBits, params.stateSizeWords,
linearMatrices_256_42_14, "linearMatrices", fp, fp2);
generateTable(params.numRounds + 1, params.stateSizeBits, params.stateSizeWords,
keyMatrices_256_42_14, "keyMatrices", fp, fp2);
writeRoundConstants(params.numRounds, params.stateSizeWords, roundConstants256_42_14, fp);
break;
case LowMC_256_256_1_316_FS:
// fall through
case LowMC_256_256_1_316_UR:
generateTable(params.numRounds, params.stateSizeBits, params.stateSizeWords,
linearMatrices_256_1_316, "linearMatrices", fp, fp2);
generateTable(params.numRounds + 1, params.stateSizeBits, params.stateSizeWords,
keyMatrices_256_1_316, "keyMatrices", fp, fp2);
writeRoundConstants(params.numRounds, params.stateSizeWords, roundConstants256_1_316, fp);
break;
case LowMC_256_256_10_38_FS:
// fall through
case LowMC_256_256_10_38_UR:
generateTable(params.numRounds, params.stateSizeBits, params.stateSizeWords,
linearMatrices_256_10_38, "linearMatrices", fp, fp2);
generateTable(params.numRounds + 1, params.stateSizeBits, params.stateSizeWords,
keyMatrices_256_10_38, "keyMatrices", fp, fp2);
writeRoundConstants(params.numRounds, params.stateSizeWords, roundConstants256_10_38, fp);
break;
}
fclose(fp);
}
int main()
{
for (picnic_params_t params = 1; params < PARAMETER_SET_MAX_INDEX; params++) {
generatelookupTables(params);
}
}