+++ /dev/null
-/* -*-c-*-
- *
- * $Id: blowfish.c,v 1.4 1997/12/08 15:29:50 mdw Exp $
- *
- * Blowfish encryption routines
- *
- * (c) 1997 Mark Wooding
- */
-
-/*----- Licencing notice --------------------------------------------------*
- *
- * This file is part of `become'
- *
- * `Become' is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * `Become' 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 `become'; if not, write to the Free Software Foundation,
- * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- */
-
-/*----- Revision history --------------------------------------------------*
- *
- * $Log: blowfish.c,v $
- * Revision 1.4 1997/12/08 15:29:50 mdw
- * Formatting fixes. Very boring.
- *
- * Revision 1.3 1997/08/07 09:42:58 mdw
- * Fix address of the FSF.
- *
- * Revision 1.2 1997/08/04 10:24:20 mdw
- * Sources placed under CVS control.
- *
- * Revision 1.1 1997/07/21 13:47:53 mdw
- * Initial revision
- *
- */
-
-/*----- Header files ------------------------------------------------------*/
-
-/* --- ANSI headers --- */
-
-#include <stdio.h>
-
-/* --- Local headers --- */
-
-#include "config.h"
-#include "blowfish.h"
-#include "utils.h"
-
-/*----- Define the initial S-box values -----------------------------------*/
-
-#include "blowfish-sbox.h"
-
-/*----- Useful macros -----------------------------------------------------*/
-
-/* --- The Blowfish round function --- *
- *
- * This is why I like this cipher. The round function is microscopic. And
- * very fast.
- */
-
-#define ROUND(L, R, K) \
- ((L) ^= k->p[K], \
- (R) ^= ((((k->s0[((L) >> 24) & 0xFF]) + \
- k->s1[((L) >> 16) & 0xFF]) ^ \
- k->s2[((L) >> 8) & 0xFF]) + \
- k->s3[((L) >> 0) & 0xFF]))
-
-/*----- Main code ---------------------------------------------------------*/
-
-/* --- @blowfish_encrypt@ --- *
- *
- * Arguments: @const blowfish_key *k@ = pointer to key block
- * @const void *from@ = block to encrypt from
- * @void *to@ = block to encrypt to
- *
- * Returns: ---
- *
- * Use: Encrypts a block using the Blowfish algorithm.
- */
-
-void blowfish_encrypt(const blowfish_key *k, const void *from, void *to)
-{
- uint_32 l, r;
- const unsigned char *f = from;
- unsigned char *t = to;
-
- /* --- Extract left and right block halves --- */
-
- l = load32(f + 0);
- r = load32(f + 4);
-
- /* --- Now run the round function on these values --- */
-
- ROUND(l, r, 0);
- ROUND(r, l, 1);
- ROUND(l, r, 2);
- ROUND(r, l, 3);
- ROUND(l, r, 4);
- ROUND(r, l, 5);
- ROUND(l, r, 6);
- ROUND(r, l, 7);
- ROUND(l, r, 8);
- ROUND(r, l, 9);
- ROUND(l, r, 10);
- ROUND(r, l, 11);
- ROUND(l, r, 12);
- ROUND(r, l, 13);
- ROUND(l, r, 14);
- ROUND(r, l, 15);
-
- /* --- Final transformation --- */
-
- l ^= k->p[16];
- r ^= k->p[17];
-
- /* --- Store the encrypted value --- */
-
- store32(t + 0, r);
- store32(t + 4, l);
-}
-
-/* --- @blowfish_decrypt@ --- *
- *
- * Arguments: @const blowfish_key *k@ = pointer to key block
- * @const void *from@ = block to decrypt from
- * @void *to@ = block to decrypt to
- *
- * Returns: ---
- *
- * Use: Decrypts a block using the Blowfish algorithm.
- */
-
-void blowfish_decrypt(const blowfish_key *k, const void *from, void *to)
-{
- uint_32 l, r;
- const unsigned char *f = from;
- unsigned char *t = to;
-
- /* --- Extract left and right block halves --- */
-
- l = load32(f + 0);
- r = load32(f + 4);
-
- /* --- Now run the round function on these values --- */
-
- ROUND(l, r, 17);
- ROUND(r, l, 16);
- ROUND(l, r, 15);
- ROUND(r, l, 14);
- ROUND(l, r, 13);
- ROUND(r, l, 12);
- ROUND(l, r, 11);
- ROUND(r, l, 10);
- ROUND(l, r, 9);
- ROUND(r, l, 8);
- ROUND(l, r, 7);
- ROUND(r, l, 6);
- ROUND(l, r, 5);
- ROUND(r, l, 4);
- ROUND(l, r, 3);
- ROUND(r, l, 2);
-
- /* --- Final transformation --- */
-
- l ^= k->p[1];
- r ^= k->p[0];
-
- /* --- Store the decrypted value --- */
-
- store32(t + 0, r);
- store32(t + 4, l);
-}
-
-/* --- @blowfish__qcrypt@ --- *
- *
- * Arguments: @const blowfish_key *k@ = pointer to a key block
- * @uint_32 *p@ = pointer to block to mangle
- *
- * Returns: ---
- *
- * Use: Mangles a block using the Blowfish algorithm.
- */
-
-static void blowfish__qcrypt(blowfish_key *k, uint_32 *p)
-{
- uint_32 l = p[0], r = p[1];
-
- /* --- Run the round function --- */
-
- ROUND(l, r, 0);
- ROUND(r, l, 1);
- ROUND(l, r, 2);
- ROUND(r, l, 3);
- ROUND(l, r, 4);
- ROUND(r, l, 5);
- ROUND(l, r, 6);
- ROUND(r, l, 7);
- ROUND(l, r, 8);
- ROUND(r, l, 9);
- ROUND(l, r, 10);
- ROUND(r, l, 11);
- ROUND(l, r, 12);
- ROUND(r, l, 13);
- ROUND(l, r, 14);
- ROUND(r, l, 15);
-
- /* --- Output transformation --- */
-
- l ^= k->p[16];
- r ^= k->p[17];
-
- /* --- Store the new values --- */
-
- p[0] = r;
- p[1] = l;
-}
-
-/* --- @blowfish__buildKey@ --- *
- *
- * Arguments: @blowfish_key *k@ = pointer to a key block to set up
- *
- * Returns: ---
- *
- * Use: Sets up the P-array and S-boxes once a key has been mixed
- * into the P-array. Use a local copy of the Blowfish
- * encryption routine, to avoid penalising the main code too
- * much with having to veneer onto a general args-in-words
- * function, and to avoid me messing about with transforming
- * values backwards and forwards between char arrays and
- * integers.
- */
-
-static void blowfish__buildKey(blowfish_key *k)
-{
- uint_32 b[2] = { 0, 0 };
- int i;
-
- /* --- First, run through the P-array --- */
-
- for (i = 0; i < 18; i += 2) {
- blowfish__qcrypt(k, b);
- k->p[i] = b[0];
- k->p[i + 1] = b[1];
- }
-
- /* --- Now do the S-boxes --- */
-
- for (i = 0; i < 256; i += 2) {
- blowfish__qcrypt(k, b);
- k->s0[i] = b[0];
- k->s0[i + 1] = b[1];
- }
-
- for (i = 0; i < 256; i += 2) {
- blowfish__qcrypt(k, b);
- k->s1[i] = b[0];
- k->s1[i + 1] = b[1];
- }
-
- for (i = 0; i < 256; i += 2) {
- blowfish__qcrypt(k, b);
- k->s2[i] = b[0];
- k->s2[i + 1] = b[1];
- }
-
- for (i = 0; i < 256; i += 2) {
- blowfish__qcrypt(k, b);
- k->s3[i] = b[0];
- k->s3[i + 1] = b[1];
- }
-}
-
-/* --- @blowfish_setKey@ --- *
- *
- * Arguments: @blowfish_key *kb@ = pointer to key block to fill
- * @void *k@ = pointer to key data
- * @size_t sz@ = length of data in bytes
- *
- * Returns: ---
- *
- * Use: Expands a key which isn't represented as a number of whole
- * words. This is a nonstandard extension, although it can be
- * used to support 40-bit keys, which some governments might
- * find more palatable than 160-bit (or 448-bit!) keys.
- */
-
-void blowfish_setKey(blowfish_key *kb, const void *k, size_t sz)
-{
- int i, j, l;
- const unsigned char *p = k;
- uint_32 a;
-
- memcpy(kb, &blowfish__init, sizeof(blowfish__init));
-
- j = 0;
- for (i = 0; i < 18; i++) {
- a = 0;
- for (l = 0; l < 4; l++) {
- a = (a << 8) | p[j];
- j++;
- if (j >= sz)
- j = 0;
- }
- kb->p[i] ^= a;
- }
-
- blowfish__buildKey(kb);
-}
-
-/*----- Test rig ----------------------------------------------------------*/
-
-#ifdef TEST_RIG
-
-int main(void)
-{
- /* --- Stage one: ECB tests --- */
-
- {
- static struct {
- uint_32 k[2];
- uint_32 p[2];
- uint_32 c[2];
- } table[] = {
- { { 0x00000000u, 0x00000000u },
- { 0x00000000u, 0x00000000u },
- { 0x4EF99745u, 0x6198DD78u } },
-
- { { 0xFFFFFFFFu, 0xFFFFFFFFu },
- { 0xFFFFFFFFu, 0xFFFFFFFFu },
- { 0x51866FD5u, 0xB85ECB8Au } },
-
- { { 0x30000000u, 0x00000000u },
- { 0x10000000u, 0x00000001u },
- { 0x7D856F9Au, 0x613063F2u } },
-
- { { 0x11111111u, 0x11111111u },
- { 0x11111111u, 0x11111111u },
- { 0x2466DD87u, 0x8B963C9Du } },
-
- { { 0x01234567u, 0x89ABCDEFu },
- { 0x11111111u, 0x11111111u },
- { 0x61F9C380u, 0x2281B096u } },
-
- { { 0x11111111u, 0x11111111u },
- { 0x01234567u, 0x89ABCDEFu },
- { 0x7D0CC630u, 0xAFDA1EC7u } },
-
- { { 0x00000000u, 0x00000000u },
- { 0x00000000u, 0x00000000u },
- { 0x4EF99745u, 0x6198DD78u } },
-
- { { 0xFEDCBA98u, 0x76543210u },
- { 0x01234567u, 0x89ABCDEFu },
- { 0x0ACEAB0Fu, 0xC6A0A28Du } },
-
- { { 0x7CA11045u, 0x4A1A6E57u },
- { 0x01A1D6D0u, 0x39776742u },
- { 0x59C68245u, 0xEB05282Bu } },
-
- { { 0x0131D961u, 0x9DC1376Eu },
- { 0x5CD54CA8u, 0x3DEF57DAu },
- { 0xB1B8CC0Bu, 0x250F09A0u } },
-
- { { 0x07A1133Eu, 0x4A0B2686u },
- { 0x0248D438u, 0x06F67172u },
- { 0x1730E577u, 0x8BEA1DA4u } },
-
- { { 0x3849674Cu, 0x2602319Eu },
- { 0x51454B58u, 0x2DDF440Au },
- { 0xA25E7856u, 0xCF2651EBu } },
-
- { { 0x04B915BAu, 0x43FEB5B6u },
- { 0x42FD4430u, 0x59577FA2u },
- { 0x353882B1u, 0x09CE8F1Au } },
-
- { { 0x0113B970u, 0xFD34F2CEu },
- { 0x059B5E08u, 0x51CF143Au },
- { 0x48F4D088u, 0x4C379918u } },
-
- { { 0x0170F175u, 0x468FB5E6u },
- { 0x0756D8E0u, 0x774761D2u },
- { 0x432193B7u, 0x8951FC98u } },
-
- { { 0x43297FADu, 0x38E373FEu },
- { 0x762514B8u, 0x29BF486Au },
- { 0x13F04154u, 0xD69D1AE5u } },
-
- { { 0x07A71370u, 0x45DA2A16u },
- { 0x3BDD1190u, 0x49372802u },
- { 0x2EEDDA93u, 0xFFD39C79u } },
-
- { { 0x04689104u, 0xC2FD3B2Fu },
- { 0x26955F68u, 0x35AF609Au },
- { 0xD887E039u, 0x3C2DA6E3u } },
-
- { { 0x37D06BB5u, 0x16CB7546u },
- { 0x164D5E40u, 0x4F275232u },
- { 0x5F99D04Fu, 0x5B163969u } },
-
- { { 0x1F08260Du, 0x1AC2465Eu },
- { 0x6B056E18u, 0x759F5CCAu },
- { 0x4A057A3Bu, 0x24D3977Bu } },
-
- { { 0x58402364u, 0x1ABA6176u },
- { 0x004BD6EFu, 0x09176062u },
- { 0x452031C1u, 0xE4FADA8Eu } },
-
- { { 0x02581616u, 0x4629B007u },
- { 0x480D3900u, 0x6EE762F2u },
- { 0x7555AE39u, 0xF59B87BDu } },
-
- { { 0x49793EBCu, 0x79B3258Fu },
- { 0x437540C8u, 0x698F3CFAu },
- { 0x53C55F9Cu, 0xB49FC019u } },
-
- { { 0x4FB05E15u, 0x15AB73A7u },
- { 0x072D43A0u, 0x77075292u },
- { 0x7A8E7BFAu, 0x937E89A3u } },
-
- { { 0x49E95D6Du, 0x4CA229BFu },
- { 0x02FE5577u, 0x8117F12Au },
- { 0xCF9C5D7Au, 0x4986ADB5u } },
-
- { { 0x018310DCu, 0x409B26D6u },
- { 0x1D9D5C50u, 0x18F728C2u },
- { 0xD1ABB290u, 0x658BC778u } },
-
- { { 0x1C587F1Cu, 0x13924FEFu },
- { 0x30553228u, 0x6D6F295Au },
- { 0x55CB3774u, 0xD13EF201u } },
-
- { { 0x01010101u, 0x01010101u },
- { 0x01234567u, 0x89ABCDEFu },
- { 0xFA34EC48u, 0x47B268B2u } },
-
- { { 0x1F1F1F1Fu, 0x0E0E0E0Eu },
- { 0x01234567u, 0x89ABCDEFu },
- { 0xA7907951u, 0x08EA3CAEu } },
-
- { { 0xE0FEE0FEu, 0xF1FEF1FEu },
- { 0x01234567u, 0x89ABCDEFu },
- { 0xC39E072Du, 0x9FAC631Du } },
-
- { { 0x00000000u, 0x00000000u },
- { 0xFFFFFFFFu, 0xFFFFFFFFu },
- { 0x014933E0u, 0xCDAFF6E4u } },
-
- { { 0xFFFFFFFFu, 0xFFFFFFFFu },
- { 0x00000000u, 0x00000000u },
- { 0xF21E9A77u, 0xB71C49BCu } },
-
- { { 0x01234567u, 0x89ABCDEFu },
- { 0x00000000u, 0x00000000u },
- { 0x24594688u, 0x5754369Au } },
-
- { { 0xFEDCBA98u, 0x76543210u },
- { 0xFFFFFFFFu, 0xFFFFFFFFu },
- { 0x6B5C5A9Cu, 0x5D9E0A5Au } }
- };
-
- int f = 1;
- int i;
-
- printf("*** stage one: ");
- fflush(stdout);
-
- for (i = 0; i < sizeof(table) / sizeof(table[0]); i++) {
- char kb[8], p[8], c[8];
- blowfish_key k;
-
- store32(kb + 0, table[i].k[0]);
- store32(kb + 4, table[i].k[1]);
- blowfish_setKey(&k, kb, 8);
-
- store32(p + 0, table[i].p[0]);
- store32(p + 4, table[i].p[1]);
- blowfish_encrypt(&k, p, c);
-
- if (load32(c + 0) != table[i].c[0] ||
- load32(c + 4) != table[i].c[1]) {
- printf("\n"
- "!!! bad encryption\n"
- " key = %08lx-%08lx\n"
- " plaintext = %08lx-%08lx\n"
- " expected ciphertext = %08lx-%08lx\n"
- " calculated ciphertext = %08lx-%08lx\n",
- (unsigned long)table[i].k[0],
- (unsigned long)table[i].k[1],
- (unsigned long)table[i].p[0],
- (unsigned long)table[i].p[1],
- (unsigned long)table[i].c[0],
- (unsigned long)table[i].c[1],
- (unsigned long)load32(c + 0),
- (unsigned long)load32(c + 4));
- f = 0;
- }
-
- blowfish_decrypt(&k, c, p);
- if (load32(p + 0) != table[i].p[0] ||
- load32(p + 4) != table[i].p[1]) {
- printf("\n"
- "!!! bad decryption\n"
- " key = %08lx-%08lx\n"
- " ciphertext = %08lx-%08lx\n"
- " expected plaintext = %08lx-%08lx\n"
- " calculated plaintext = %08lx-%08lx\n",
- (unsigned long)table[i].k[0],
- (unsigned long)table[i].k[1],
- (unsigned long)table[i].c[0],
- (unsigned long)table[i].c[1],
- (unsigned long)table[i].p[0],
- (unsigned long)table[i].p[1],
- (unsigned long)load32(p + 0),
- (unsigned long)load32(p + 4));
- f = 0;
- }
-
- putchar('.');
- fflush(stdout);
- }
- putchar('\n');
- if (f)
- printf("*** stage one ok\n");
- }
-
- /* --- Stage 2: key scheduling --- */
-
- {
- static struct {
- uint_32 c[2];
- } table[] = {
- {{ 0xF9AD597Cu, 0x49DB005Eu }},
- {{ 0xE91D21C1u, 0xD961A6D6u }},
- {{ 0xE9C2B70Au, 0x1BC65CF3u }},
- {{ 0xBE1E6394u, 0x08640F05u }},
- {{ 0xB39E4448u, 0x1BDB1E6Eu }},
- {{ 0x9457AA83u, 0xB1928C0Du }},
- {{ 0x8BB77032u, 0xF960629Du }},
- {{ 0xE87A244Eu, 0x2CC85E82u }},
- {{ 0x15750E7Au, 0x4F4EC577u }},
- {{ 0x122BA70Bu, 0x3AB64AE0u }},
- {{ 0x3A833C9Au, 0xFFC537F6u }},
- {{ 0x9409DA87u, 0xA90F6BF2u }},
- {{ 0x884F8062u, 0x5060B8B4u }},
- {{ 0x1F85031Cu, 0x19E11968u }},
- {{ 0x79D9373Au, 0x714CA34Fu }},
- {{ 0x93142887u, 0xEE3BE15Cu }},
- {{ 0x03429E83u, 0x8CE2D14Bu }},
- {{ 0xA4299E27u, 0x469FF67Bu }},
- {{ 0xAFD5AED1u, 0xC1BC96A8u }},
- {{ 0x10851C0Eu, 0x3858DA9Fu }},
- {{ 0xE6F51ED7u, 0x9B9DB21Fu }},
- {{ 0x64A6E14Au, 0xFD36B46Fu }},
- {{ 0x80C7D7D4u, 0x5A5479ADu }},
- {{ 0x05044B62u, 0xFA52D080u }},
- };
-
- unsigned char kk[] = {
- 0xF0, 0xE1, 0xD2, 0xC3, 0xB4, 0xA5, 0x96, 0x87,
- 0x78, 0x69, 0x5A, 0x4B, 0x3C, 0x2D, 0x1E, 0x0F,
- 0x00, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77
- };
-
- int i;
- int f = 1;
-
- printf("*** stage two: ");
- fflush(stdout);
-
- for (i = 0; i < sizeof(kk); i++) {
- blowfish_key k;
- unsigned char p[8] = { 0xFE, 0xDC, 0xBA, 0x98,
- 0x76, 0x54, 0x32, 0x10 };
-
- blowfish_setKey(&k, kk, i + 1);
- blowfish_encrypt(&k, p, p);
-
- if (load32(p + 0) != table[i].c[0] ||
- load32(p + 4) != table[i].c[1]) {
- printf("!!! bad encryption\n"
- " key length = %i\n"
- " expected = %08lx-%08lx\n"
- " calculated = %08lx-%08lx\n",
- i + 1,
- (unsigned long)table[i].c[0],
- (unsigned long)table[i].c[1],
- (unsigned long)load32(p + 0),
- (unsigned long)load32(p + 4));
- f = 0;
- }
-
- putchar('.');
- fflush(stdout);
- }
-
- putchar('\n');
-
- if (f)
- printf("*** stage two ok\n");
- }
-
- return (0);
-
-}
-
-#endif
-
-/*----- That's all, folks -------------------------------------------------*/
~mdw / become / blobdiff