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Diffstat (limited to 'sys/crypto/rc5/rc5.c')
-rw-r--r-- | sys/crypto/rc5/rc5.c | 219 |
1 files changed, 0 insertions, 219 deletions
diff --git a/sys/crypto/rc5/rc5.c b/sys/crypto/rc5/rc5.c deleted file mode 100644 index 99a8ac6..0000000 --- a/sys/crypto/rc5/rc5.c +++ /dev/null @@ -1,219 +0,0 @@ -/* $FreeBSD$ */ -/* $KAME: rc5.c,v 1.3 2000/03/27 04:36:36 sumikawa Exp $ */ - -/* - * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. - * All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 3. Neither the name of the project nor the names of its contributors - * may be used to endorse or promote products derived from this software - * without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - */ -#include <crypto/rc5/rc5.h> - - -void -set_rc5_expandkey(e_key, key, keylen, rounds) - RC5_WORD *e_key; - u_int8_t *key; - size_t keylen; - int rounds; -{ - int i, j, k, LL, t, T; - RC5_WORD L[256/WW]; - RC5_WORD A, B; - - LL = (keylen + WW - 1) / WW; - - bzero(L, sizeof(RC5_WORD)*LL); - - for (i = 0; i < keylen; i++) { - t = (key[i] & 0xff) << (8*(i%4)); - L[i/WW] = L[i/WW] + t; - } - - T = 2 * (rounds + 1); - e_key[0] = Pw; - for (i = 1; i < T; i++) - e_key[i] = e_key[i-1] + Qw; - - i = j = 0; - A = B = 0; - if (LL > T) - k = 3 * LL; - else - k = 3 * T; - - for (; k > 0; k--) { - A = ROTL(e_key[i]+A+B, 3, W); - e_key[i] = A; - B = ROTL(L[j]+A+B, A+B, W); - L[j] = B; - - i = (i + 1) % T; - j = (j + 1) % LL; - } -} - - -/* - * - */ -void -rc5_encrypt_round16(out, in, e_key) - u_int8_t *out; - const u_int8_t *in; - const RC5_WORD *e_key; -{ - RC5_WORD A, B; - const RC5_WORD *e_keyA, *e_keyB; - - A = in[0] & 0xff; - A += (in[1] & 0xff) << 8; - A += (in[2] & 0xff) << 16; - A += (in[3] & 0xff) << 24; - B = in[4] & 0xff; - B += (in[5] & 0xff) << 8; - B += (in[6] & 0xff) << 16; - B += (in[7] & 0xff) << 24; - - e_keyA = e_key; - e_keyB = e_key + 1; - - A += *e_keyA; e_keyA += 2; - B += *e_keyB; e_keyB += 2; - - A = ROTL(A^B, B, W) + *e_keyA; e_keyA += 2; - B = ROTL(B^A, A, W) + *e_keyB; e_keyB += 2; - A = ROTL(A^B, B, W) + *e_keyA; e_keyA += 2; - B = ROTL(B^A, A, W) + *e_keyB; e_keyB += 2; - A = ROTL(A^B, B, W) + *e_keyA; e_keyA += 2; - B = ROTL(B^A, A, W) + *e_keyB; e_keyB += 2; - A = ROTL(A^B, B, W) + *e_keyA; e_keyA += 2; - B = ROTL(B^A, A, W) + *e_keyB; e_keyB += 2; /* round 4 */ - A = ROTL(A^B, B, W) + *e_keyA; e_keyA += 2; - B = ROTL(B^A, A, W) + *e_keyB; e_keyB += 2; - A = ROTL(A^B, B, W) + *e_keyA; e_keyA += 2; - B = ROTL(B^A, A, W) + *e_keyB; e_keyB += 2; - A = ROTL(A^B, B, W) + *e_keyA; e_keyA += 2; - B = ROTL(B^A, A, W) + *e_keyB; e_keyB += 2; - A = ROTL(A^B, B, W) + *e_keyA; e_keyA += 2; - B = ROTL(B^A, A, W) + *e_keyB; e_keyB += 2; /* round 8 */ - A = ROTL(A^B, B, W) + *e_keyA; e_keyA += 2; - B = ROTL(B^A, A, W) + *e_keyB; e_keyB += 2; - A = ROTL(A^B, B, W) + *e_keyA; e_keyA += 2; - B = ROTL(B^A, A, W) + *e_keyB; e_keyB += 2; - A = ROTL(A^B, B, W) + *e_keyA; e_keyA += 2; - B = ROTL(B^A, A, W) + *e_keyB; e_keyB += 2; - A = ROTL(A^B, B, W) + *e_keyA; e_keyA += 2; - B = ROTL(B^A, A, W) + *e_keyB; e_keyB += 2; /* round 12 */ - A = ROTL(A^B, B, W) + *e_keyA; e_keyA += 2; - B = ROTL(B^A, A, W) + *e_keyB; e_keyB += 2; - A = ROTL(A^B, B, W) + *e_keyA; e_keyA += 2; - B = ROTL(B^A, A, W) + *e_keyB; e_keyB += 2; - A = ROTL(A^B, B, W) + *e_keyA; e_keyA += 2; - B = ROTL(B^A, A, W) + *e_keyB; e_keyB += 2; - A = ROTL(A^B, B, W) + *e_keyA; e_keyA += 2; - B = ROTL(B^A, A, W) + *e_keyB; e_keyB += 2; /* round 16 */ - - out[0] = A & 0xff; - out[1] = (A >> 8) & 0xff; - out[2] = (A >> 16) & 0xff; - out[3] = (A >> 24) & 0xff; - out[4] = B & 0xff; - out[5] = (B >> 8) & 0xff; - out[6] = (B >> 16) & 0xff; - out[7] = (B >> 24) & 0xff; -} - - -/* - * - */ -void -rc5_decrypt_round16(out, in, e_key) - u_int8_t *out; - const u_int8_t *in; - const RC5_WORD *e_key; -{ - RC5_WORD A, B; - const RC5_WORD *e_keyA, *e_keyB; - - A = in[0] & 0xff; - A += (in[1] & 0xff) << 8; - A += (in[2] & 0xff) << 16; - A += (in[3] & 0xff) << 24; - B = in[4] & 0xff; - B += (in[5] & 0xff) << 8; - B += (in[6] & 0xff) << 16; - B += (in[7] & 0xff) << 24; - - e_keyA = e_key + 2*16; - e_keyB = e_key + 2*16 + 1; - - B = ROTR(B-*e_keyB, A, W) ^ A; e_keyB -= 2; - A = ROTR(A-*e_keyA, B, W) ^ B; e_keyA -= 2; - B = ROTR(B-*e_keyB, A, W) ^ A; e_keyB -= 2; - A = ROTR(A-*e_keyA, B, W) ^ B; e_keyA -= 2; - B = ROTR(B-*e_keyB, A, W) ^ A; e_keyB -= 2; - A = ROTR(A-*e_keyA, B, W) ^ B; e_keyA -= 2; - B = ROTR(B-*e_keyB, A, W) ^ A; e_keyB -= 2; - A = ROTR(A-*e_keyA, B, W) ^ B; e_keyA -= 2; /* round 4 */ - B = ROTR(B-*e_keyB, A, W) ^ A; e_keyB -= 2; - A = ROTR(A-*e_keyA, B, W) ^ B; e_keyA -= 2; - B = ROTR(B-*e_keyB, A, W) ^ A; e_keyB -= 2; - A = ROTR(A-*e_keyA, B, W) ^ B; e_keyA -= 2; - B = ROTR(B-*e_keyB, A, W) ^ A; e_keyB -= 2; - A = ROTR(A-*e_keyA, B, W) ^ B; e_keyA -= 2; - B = ROTR(B-*e_keyB, A, W) ^ A; e_keyB -= 2; - A = ROTR(A-*e_keyA, B, W) ^ B; e_keyA -= 2; /* round 8 */ - B = ROTR(B-*e_keyB, A, W) ^ A; e_keyB -= 2; - A = ROTR(A-*e_keyA, B, W) ^ B; e_keyA -= 2; - B = ROTR(B-*e_keyB, A, W) ^ A; e_keyB -= 2; - A = ROTR(A-*e_keyA, B, W) ^ B; e_keyA -= 2; - B = ROTR(B-*e_keyB, A, W) ^ A; e_keyB -= 2; - A = ROTR(A-*e_keyA, B, W) ^ B; e_keyA -= 2; - B = ROTR(B-*e_keyB, A, W) ^ A; e_keyB -= 2; - A = ROTR(A-*e_keyA, B, W) ^ B; e_keyA -= 2; /* round 12 */ - B = ROTR(B-*e_keyB, A, W) ^ A; e_keyB -= 2; - A = ROTR(A-*e_keyA, B, W) ^ B; e_keyA -= 2; - B = ROTR(B-*e_keyB, A, W) ^ A; e_keyB -= 2; - A = ROTR(A-*e_keyA, B, W) ^ B; e_keyA -= 2; - B = ROTR(B-*e_keyB, A, W) ^ A; e_keyB -= 2; - A = ROTR(A-*e_keyA, B, W) ^ B; e_keyA -= 2; - B = ROTR(B-*e_keyB, A, W) ^ A; e_keyB -= 2; - A = ROTR(A-*e_keyA, B, W) ^ B; e_keyA -= 2; /* round 16 */ - - B = B - *e_keyB; - A = A - *e_keyA; - - out[0] = A & 0xff; - out[1] = (A >> 8) & 0xff; - out[2] = (A >> 16) & 0xff; - out[3] = (A >> 24) & 0xff; - out[4] = B & 0xff; - out[5] = (B >> 8) & 0xff; - out[6] = (B >> 16) & 0xff; - out[7] = (B >> 24) & 0xff; -} - |