81 lines
3.3 KiB
C
81 lines
3.3 KiB
C
/*********************************************************************************
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* Copyright (c) 2013, 2014, 2015, 2021 Thomas Daede, Cory Fields, Pieter Wuille *
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* Distributed under the MIT software license, see the accompanying *
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* file COPYING or https://www.opensource.org/licenses/mit-license.php. *
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*********************************************************************************/
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#include <inttypes.h>
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#include <stdio.h>
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#include "../include/secp256k1.h"
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#include "assumptions.h"
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#include "util.h"
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#include "group.h"
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#include "ecmult_gen.h"
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#include "ecmult_gen_compute_table_impl.h"
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int main(int argc, char **argv) {
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const char outfile[] = "src/precomputed_ecmult_gen.c";
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FILE* fp;
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int bits;
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(void)argc;
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(void)argv;
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fp = fopen(outfile, "w");
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if (fp == NULL) {
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fprintf(stderr, "Could not open %s for writing!\n", outfile);
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return -1;
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}
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fprintf(fp, "/* This file was automatically generated by precompute_ecmult_gen. */\n");
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fprintf(fp, "/* See ecmult_gen_impl.h for details about the contents of this file. */\n");
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fprintf(fp, "#if defined HAVE_CONFIG_H\n");
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fprintf(fp, "# include \"libsecp256k1-config.h\"\n");
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fprintf(fp, "#endif\n");
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fprintf(fp, "#include \"../include/secp256k1.h\"\n");
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fprintf(fp, "#include \"group.h\"\n");
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fprintf(fp, "#include \"ecmult_gen.h\"\n");
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fprintf(fp, "#include \"precomputed_ecmult_gen.h\"\n");
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fprintf(fp, "#ifdef EXHAUSTIVE_TEST_ORDER\n");
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fprintf(fp, "# error Cannot compile precomputed_ecmult_gen.c in exhaustive test mode\n");
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fprintf(fp, "#endif /* EXHAUSTIVE_TEST_ORDER */\n");
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fprintf(fp, "#define S(a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p) SECP256K1_GE_STORAGE_CONST(0x##a##u,0x##b##u,0x##c##u,0x##d##u,0x##e##u,0x##f##u,0x##g##u,0x##h##u,0x##i##u,0x##j##u,0x##k##u,0x##l##u,0x##m##u,0x##n##u,0x##o##u,0x##p##u)\n");
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fprintf(fp, "const rustsecp256k1_v0_5_0_ge_storage rustsecp256k1_v0_5_0_ecmult_gen_prec_table[ECMULT_GEN_PREC_N(ECMULT_GEN_PREC_BITS)][ECMULT_GEN_PREC_G(ECMULT_GEN_PREC_BITS)] = {\n");
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for (bits = 2; bits <= 8; bits *= 2) {
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int g = ECMULT_GEN_PREC_G(bits);
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int n = ECMULT_GEN_PREC_N(bits);
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int inner, outer;
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rustsecp256k1_v0_5_0_ge_storage* table = checked_malloc(&default_error_callback, n * g * sizeof(rustsecp256k1_v0_5_0_ge_storage));
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rustsecp256k1_v0_5_0_ecmult_gen_compute_table(table, &rustsecp256k1_v0_5_0_ge_const_g, bits);
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fprintf(fp, "#if ECMULT_GEN_PREC_BITS == %d\n", bits);
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for(outer = 0; outer != n; outer++) {
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fprintf(fp,"{");
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for(inner = 0; inner != g; inner++) {
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fprintf(fp, "S(%"PRIx32",%"PRIx32",%"PRIx32",%"PRIx32",%"PRIx32",%"PRIx32",%"PRIx32",%"PRIx32
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",%"PRIx32",%"PRIx32",%"PRIx32",%"PRIx32",%"PRIx32",%"PRIx32",%"PRIx32",%"PRIx32")",
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SECP256K1_GE_STORAGE_CONST_GET(table[outer * g + inner]));
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if (inner != g - 1) {
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fprintf(fp,",\n");
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}
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}
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if (outer != n - 1) {
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fprintf(fp,"},\n");
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} else {
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fprintf(fp,"}\n");
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}
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}
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fprintf(fp, "#endif\n");
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free(table);
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}
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fprintf(fp, "};\n");
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fprintf(fp, "#undef S\n");
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fclose(fp);
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return 0;
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}
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