mirror of
https://github.com/trezor/trezor-firmware.git
synced 2024-12-27 16:48:09 +00:00
74 lines
1.9 KiB
C
74 lines
1.9 KiB
C
#include <assert.h>
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#include <stdio.h>
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#include "bignum.h"
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#include "bip32.h"
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#include "ecdsa.h"
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#include "rand.h"
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/*
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* This program prints the contents of the ecdsa_curve.cp array.
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* The entry cp[i][j] contains the number (2*j+1)*16^i*G,
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* where G is the generator of the specified elliptic curve.
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*/
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int main(int argc, char **argv) {
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int i, j, k;
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if (argc != 2) {
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printf("Usage: %s CURVE_NAME\n", argv[0]);
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return 1;
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}
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const char *name = argv[1];
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const curve_info *info = get_curve_by_name(name);
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if (info == 0) {
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printf("Unknown curve '%s'\n", name);
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return 1;
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}
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const ecdsa_curve *curve = info->params;
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if (curve == 0) {
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printf("Unknown curve params");
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return 1;
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}
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curve_point ng = curve->G;
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curve_point pow2ig = curve->G;
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for (i = 0; i < 64; i++) {
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// invariants:
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// pow2ig = 16^i * G
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// ng = pow2ig
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printf("\t{\n");
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for (j = 0; j < 8; j++) {
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// invariants:
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// pow2ig = 16^i * G
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// ng = (2*j+1) * 16^i * G
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#ifndef NDEBUG
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curve_point checkresult;
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bignum256 a;
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bn_zero(&a);
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a.val[(4 * i) / BN_BITS_PER_LIMB] = ((uint32_t)2 * j + 1)
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<< ((4 * i) % BN_BITS_PER_LIMB);
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bn_normalize(&a);
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point_multiply(curve, &a, &curve->G, &checkresult);
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assert(point_is_equal(&checkresult, &ng));
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#endif
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printf("\t\t/* %2d*16^%d*G: */\n\t\t{{{", 2 * j + 1, i);
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// print x coordinate
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for (k = 0; k < 9; k++) {
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printf((k < 8 ? "0x%08x, " : "0x%04x"), ng.x.val[k]);
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}
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printf("}},\n\t\t {{");
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// print y coordinate
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for (k = 0; k < 9; k++) {
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printf((k < 8 ? "0x%08x, " : "0x%04x"), ng.y.val[k]);
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}
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if (j == 7) {
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printf("}}}\n\t},\n");
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} else {
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printf("}}},\n");
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point_add(curve, &pow2ig, &ng);
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}
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point_add(curve, &pow2ig, &ng);
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}
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pow2ig = ng;
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}
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return 0;
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}
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