projects / u / mdw / catacomb / blame
| Commit | Line | Data |
|---|---|---|
| 8dd8c294 | 1 | /* -*-c-*- |
| 2 | * | |
| 8dd8c294 | 3 | * Check the Serpent S-boxes |
| 4 | * | |
| 5 | * (c) 2000 Straylight/Edgeware | |
| 6 | */ | |
| 7 | ||
| 45c0fd36 | 8 | /*----- Licensing notice --------------------------------------------------* |
| 8dd8c294 | 9 | * |
| 10 | * This file is part of Catacomb. | |
| 11 | * | |
| 12 | * Catacomb is free software; you can redistribute it and/or modify | |
| 13 | * it under the terms of the GNU Library General Public License as | |
| 14 | * published by the Free Software Foundation; either version 2 of the | |
| 15 | * License, or (at your option) any later version. | |
| 45c0fd36 | 16 | * |
| 8dd8c294 | 17 | * Catacomb is distributed in the hope that it will be useful, |
| 18 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 20 | * GNU Library General Public License for more details. | |
| 45c0fd36 | 21 | * |
| 8dd8c294 | 22 | * You should have received a copy of the GNU Library General Public |
| 23 | * License along with Catacomb; if not, write to the Free | |
| 24 | * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, | |
| 25 | * MA 02111-1307, USA. | |
| 26 | */ | |
| 27 | ||
| 8dd8c294 | 28 | /*----- Header files ------------------------------------------------------*/ |
| 29 | ||
| 30 | #include <stdio.h> | |
| 31 | #include <stdlib.h> | |
| 32 | #include <string.h> | |
| 33 | ||
| 34 | #include <mLib/bits.h> | |
| 35 | ||
| 36 | #include "serpent-sbox.h" | |
| 37 | ||
| 38 | /*----- S-box tables ------------------------------------------------------*/ | |
| 39 | ||
| 40 | static const octet s[8][16] = { | |
| 45c0fd36 MW |
41 | { 3, 8, 15, 1, 10, 6, 5, 11, 14, 13, 4, 2, 7, 0, 9, 12 }, |
| 42 | { 15, 12, 2, 7, 9, 0, 5, 10, 1, 11, 14, 8, 6, 13, 3, 4 }, | |
| 43 | { 8, 6, 7, 9, 3, 12, 10, 15, 13, 1, 14, 4, 0, 11, 5, 2 }, | |
| 44 | { 0, 15, 11, 8, 12, 9, 6, 3, 13, 1, 2, 4, 10, 7, 5, 14 }, | |
| 45 | { 1, 15, 8, 3, 12, 0, 11, 6, 2, 5, 4, 10, 9, 14, 7, 13 }, | |
| 46 | { 15, 5, 2, 11, 4, 10, 9, 12, 0, 3, 14, 8, 13, 6, 7, 1 }, | |
| 47 | { 7, 2, 12, 5, 8, 4, 6, 11, 14, 9, 1, 15, 13, 3, 10, 0 }, | |
| 48 | { 1, 13, 15, 0, 14, 8, 2, 11, 7, 4, 12, 10, 9, 3, 5, 6 } | |
| 8dd8c294 | 49 | }; |
| 50 | ||
| 51 | /*----- Main code ---------------------------------------------------------*/ | |
| 52 | ||
| 53 | /* --- @check@ --- * | |
| 54 | * | |
| 55 | * Arguments: @unsigned a, b, c, d@ = four bitslice output registers | |
| 56 | * @const octet *p@ = pointer to S-box | |
| 57 | * | |
| 58 | * Returns: Zero if OK, nonzero on failure. | |
| 59 | * | |
| 60 | * Use: Checks that an S-box output is correct. | |
| 61 | */ | |
| 62 | ||
| 63 | static int check(unsigned a, unsigned b, unsigned c, unsigned d, | |
| 64 | const octet *p) | |
| 65 | { | |
| 66 | octet buf[16]; | |
| 67 | octet *q = buf; | |
| 68 | unsigned i; | |
| 69 | ||
| 70 | for (i = 0; i < 16; i++) { | |
| 71 | *q++ = (a & 1) | ((b & 1) << 1) | ((c & 1) << 2) | ((d & 1) << 3); | |
| 72 | a >>= 1; b >>= 1; c >>= 1; d >>= 1; | |
| 73 | } | |
| 74 | return (memcmp(buf, p, sizeof(buf))); | |
| 75 | } | |
| 76 | ||
| 77 | #define CHECK(i) do { \ | |
| 78 | unsigned a = 0xaaaa, b = 0xcccc, c = 0xf0f0, d = 0xff00; \ | |
| 79 | S##i(a, b, c, d); \ | |
| 80 | if (check(a, b, c, d, s[i])) { \ | |
| 81 | fprintf(stderr, "failure in S%i\n", i); \ | |
| 82 | rc = EXIT_FAILURE; \ | |
| 83 | } \ | |
| 84 | IS##i(a, b, c, d); \ | |
| 85 | if (a != 0xaaaa || b != 0xcccc || c != 0xf0f0 || d != 0xff00) { \ | |
| 86 | fprintf(stderr, "failure in IS%i\n", i); \ | |
| 87 | rc = EXIT_FAILURE; \ | |
| 88 | } \ | |
| 89 | } while (0) | |
| 90 | ||
| 91 | int main(void) | |
| 92 | { | |
| 93 | int rc = 0; | |
| 94 | CHECK(0); CHECK(1); CHECK(2); CHECK(3); | |
| 95 | CHECK(4); CHECK(5); CHECK(6); CHECK(7); | |
| 96 | return (rc); | |
| 97 | } | |
| 98 | ||
| 99 | /*----- That's all, folks -------------------------------------------------*/ |