X-Git-Url: https://git.distorted.org.uk/~mdw/secnet/blobdiff_plain/137d3b36ce3d121855364d3a28383ab86fbb9d7b..ae8cd973b817f81c075ab20e84d3239125146f24:/x448.c diff --git a/x448.c b/x448.c deleted file mode 100644 index c58335a..0000000 --- a/x448.c +++ /dev/null @@ -1,201 +0,0 @@ -/* - * x448.c: Hamburg's X448 key-exchange function - */ -/* - * This file is Free Software. It has been modified to as part of its - * incorporation into secnet. - * - * Copyright 2017 Mark Wooding - * - * You may redistribute this file and/or modify it under the terms of - * the permissive licence shown below. - * - * You may redistribute secnet as a whole and/or modify it under the - * terms of the GNU General Public License as published by the Free - * Software Foundation; either version 3, or (at your option) any - * later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, see - * https://www.gnu.org/licenses/gpl.html. - */ -/* - * Imported from Catacomb, and modified for Secnet (2017-04-30): - * - * * Use `fake-mLib-bits.h' in place of the real . - * - * * Remove the test rig code: a replacement is in a separate source file. - * - * * Strip out the key-management definitions. - * - * The file's original comment headers are preserved below. - */ -/* -*-c-*- - * - * The X448 key-agreement algorithm - * - * (c) 2017 Straylight/Edgeware - */ - -/*----- Licensing notice --------------------------------------------------* - * - * This file is part of Catacomb. - * - * Catacomb is free software; you can redistribute it and/or modify - * it under the terms of the GNU Library General Public License as - * published by the Free Software Foundation; either version 2 of the - * License, or (at your option) any later version. - * - * Catacomb is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU Library General Public License for more details. - * - * You should have received a copy of the GNU Library General Public - * License along with Catacomb; if not, write to the Free - * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, - * MA 02111-1307, USA. - */ - -/*----- Header files ------------------------------------------------------*/ - -#include "fake-mLib-bits.h" - -#include "montladder.h" -#include "fgoldi.h" -#include "x448.h" - -/*----- Important constants -----------------------------------------------*/ - -const octet x448_base[56] = { 5, 0, /* ... */ }; - -#define A0 39081 - -/*----- Main code ---------------------------------------------------------*/ - -/* --- @x448@ --- * - * - * Arguments: @octet zz[X448_OUTSZ]@ = where to put the result - * @const octet k[X448_KEYSZ]@ = pointer to private key - * @const octet qx[X448_PUBSZ]@ = pointer to public value - * - * Returns: --- - * - * Use: Calculates X448 of @k@ and @qx@. - */ - -void x448(octet zz[X448_OUTSZ], - const octet k[X448_KEYSZ], - const octet qx[X448_PUBSZ]) -{ - uint32 kw[14]; - fgoldi x1; - unsigned i; - - /* Load and clamp the key. The low bits are cleared to kill the small - * subgroups on the curve and its twist, and a high bit is set to guard - * against careless implementations, though this isn't one of those. - */ - for (i = 0; i < 14; i++) kw[i] = LOAD32_L(k + 4*i); - kw[0] &= 0xfffffffc; kw[13] |= 0x80000000; - - /* And run the ladder. */ - fgoldi_load(&x1, qx); -#define MULA0(z, x) do { fgoldi_mulconst((z), (x), A0); } while (0) - MONT_LADDER(fgoldi, MULA0, kw, 14, 32, &x1, &x1); -#undef MULA0 - fgoldi_store(zz, &x1); -} - -/*----- Test rig ----------------------------------------------------------*/ - -#ifdef TEST_RIG - -#include -#include -#include - -static int vrf_x448(dstr dv[]) -{ - dstr dz = DSTR_INIT; - int ok = 1; - - if (dv[0].len != 56) die(1, "bad key length"); - if (dv[1].len != 56) die(1, "bad public length"); - if (dv[2].len != 56) die(1, "bad result length"); - - dstr_ensure(&dz, 56); dz.len = 56; - x448((octet *)dz.buf, - (const octet *)dv[0].buf, - (const octet *)dv[1].buf); - if (memcmp(dz.buf, dv[2].buf, 56) != 0) { - ok = 0; - fprintf(stderr, "failed!"); - fprintf(stderr, "\n\t k = "); type_hex.dump(&dv[0], stderr); - fprintf(stderr, "\n\t p = "); type_hex.dump(&dv[1], stderr); - fprintf(stderr, "\n\twant = "); type_hex.dump(&dv[2], stderr); - fprintf(stderr, "\n\tcalc = "); type_hex.dump(&dz, stderr); - fprintf(stderr, "\n"); - } - - dstr_destroy(&dz); - return (ok); -} - -static int vrf_mct(dstr dv[]) -{ - octet b0[56], b1[56], *k = b0, *x = b1, *t; - unsigned long i, niter; - dstr d = DSTR_INIT; - int ok = 1; - - if (dv[0].len != sizeof(b0)) { fprintf(stderr, "k len\n"); exit(2); } - if (dv[1].len != sizeof(b1)) { fprintf(stderr, "x len\n"); exit(2); } - if (dv[3].len != sizeof(b0)) { fprintf(stderr, "result len\n"); exit(2); } - memcpy(b0, dv[0].buf, sizeof(b0)); - memcpy(b1, dv[1].buf, sizeof(b1)); - niter = *(unsigned long *)dv[2].buf; - dstr_ensure(&d, 56); d.len = 56; t = (octet *)d.buf; - - for (i = 0; i < niter; i++) { - x448(x, k, x); - t = x; x = k; k = t; - } - memcpy(d.buf, k, d.len); - - if (memcmp(d.buf, dv[3].buf, d.len) != 0) { - ok = 0; - fprintf(stderr, "failed..."); - fprintf(stderr, "\n\tinitial k = "); type_hex.dump(&dv[0], stderr); - fprintf(stderr, "\n\tinitial x = "); type_hex.dump(&dv[1], stderr); - fprintf(stderr, "\n\titerations = %lu", niter); - fprintf(stderr, "\n\texpected = "); type_hex.dump(&dv[3], stderr); - fprintf(stderr, "\n\tcalculated = "); type_hex.dump(&d, stderr); - fputc('\n', stderr); - } - - dstr_destroy(&d); - return (ok); -} - -static test_chunk tests[] = { - { "x448", vrf_x448, { &type_hex, &type_hex, &type_hex } }, - { "x448-mct", vrf_mct, - { &type_hex, &type_hex, &type_ulong, &type_hex } }, - { 0, 0, { 0 } } -}; - -int main(int argc, char *argv[]) -{ - test_run(argc, argv, tests, SRCDIR "/t/x448"); - return (0); -} - -#endif - -/*----- That's all, folks -------------------------------------------------*/