mirror of
https://github.com/RfidResearchGroup/proxmark3.git
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838c15a643
CHG: change the auth_ex method to send usb package faster, REM: removed some bucketsort changes.
147 lines
5 KiB
C
Executable file
147 lines
5 KiB
C
Executable file
/* crypto1.c
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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MA 02110-1301, US
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Copyright (C) 2008-2008 bla <blapost@gmail.com>
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*/
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#include "crapto1.h"
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#include <stdlib.h>
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struct Crypto1State * crypto1_create(uint64_t key)
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{
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struct Crypto1State *s = malloc(sizeof(*s));
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if ( !s ) return NULL;
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s->odd = s->even = 0;
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int i;
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//for(i = 47;s && i > 0; i -= 2) {
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for(i = 47; i > 0; i -= 2) {
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s->odd = s->odd << 1 | BIT(key, (i - 1) ^ 7);
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s->even = s->even << 1 | BIT(key, i ^ 7);
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}
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return s;
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}
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void crypto1_destroy(struct Crypto1State *state)
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{
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free(state);
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}
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void crypto1_get_lfsr(struct Crypto1State *state, uint64_t *lfsr)
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{
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int i;
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for(*lfsr = 0, i = 23; i >= 0; --i) {
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*lfsr = *lfsr << 1 | BIT(state->odd, i ^ 3);
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*lfsr = *lfsr << 1 | BIT(state->even, i ^ 3);
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}
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}
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uint8_t crypto1_bit(struct Crypto1State *s, uint8_t in, int is_encrypted)
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{
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uint32_t feedin;
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uint32_t tmp;
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uint8_t ret = filter(s->odd);
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feedin = ret & !!is_encrypted;
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feedin ^= !!in;
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feedin ^= LF_POLY_ODD & s->odd;
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feedin ^= LF_POLY_EVEN & s->even;
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s->even = s->even << 1 | parity(feedin);
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tmp = s->odd;
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s->odd = s->even;
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s->even = tmp;
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return ret;
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}
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uint8_t crypto1_byte(struct Crypto1State *s, uint8_t in, int is_encrypted)
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{
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/*
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uint8_t i, ret = 0;
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for (i = 0; i < 8; ++i)
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ret |= crypto1_bit(s, BIT(in, i), is_encrypted) << i;
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*/
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// unfold loop 20161012
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uint8_t ret = 0;
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ret |= crypto1_bit(s, BIT(in, 0), is_encrypted) << 0;
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ret |= crypto1_bit(s, BIT(in, 1), is_encrypted) << 1;
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ret |= crypto1_bit(s, BIT(in, 2), is_encrypted) << 2;
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ret |= crypto1_bit(s, BIT(in, 3), is_encrypted) << 3;
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ret |= crypto1_bit(s, BIT(in, 4), is_encrypted) << 4;
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ret |= crypto1_bit(s, BIT(in, 5), is_encrypted) << 5;
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ret |= crypto1_bit(s, BIT(in, 6), is_encrypted) << 6;
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ret |= crypto1_bit(s, BIT(in, 7), is_encrypted) << 7;
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return ret;
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}
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uint32_t crypto1_word(struct Crypto1State *s, uint32_t in, int is_encrypted)
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{
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/*
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uint32_t i, ret = 0;
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for (i = 0; i < 32; ++i)
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ret |= crypto1_bit(s, BEBIT(in, i), is_encrypted) << (i ^ 24);
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*/
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//unfold loop 2016012
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uint32_t ret = 0;
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ret |= crypto1_bit(s, BEBIT(in, 0), is_encrypted) << (0 ^ 24);
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ret |= crypto1_bit(s, BEBIT(in, 1), is_encrypted) << (1 ^ 24);
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ret |= crypto1_bit(s, BEBIT(in, 2), is_encrypted) << (2 ^ 24);
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ret |= crypto1_bit(s, BEBIT(in, 3), is_encrypted) << (3 ^ 24);
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ret |= crypto1_bit(s, BEBIT(in, 4), is_encrypted) << (4 ^ 24);
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ret |= crypto1_bit(s, BEBIT(in, 5), is_encrypted) << (5 ^ 24);
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ret |= crypto1_bit(s, BEBIT(in, 6), is_encrypted) << (6 ^ 24);
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ret |= crypto1_bit(s, BEBIT(in, 7), is_encrypted) << (7 ^ 24);
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ret |= crypto1_bit(s, BEBIT(in, 8), is_encrypted) << (8 ^ 24);
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ret |= crypto1_bit(s, BEBIT(in, 9), is_encrypted) << (9 ^ 24);
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ret |= crypto1_bit(s, BEBIT(in, 10), is_encrypted) << (10 ^ 24);
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ret |= crypto1_bit(s, BEBIT(in, 11), is_encrypted) << (11 ^ 24);
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ret |= crypto1_bit(s, BEBIT(in, 12), is_encrypted) << (12 ^ 24);
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ret |= crypto1_bit(s, BEBIT(in, 13), is_encrypted) << (13 ^ 24);
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ret |= crypto1_bit(s, BEBIT(in, 14), is_encrypted) << (14 ^ 24);
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ret |= crypto1_bit(s, BEBIT(in, 15), is_encrypted) << (15 ^ 24);
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ret |= crypto1_bit(s, BEBIT(in, 16), is_encrypted) << (16 ^ 24);
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ret |= crypto1_bit(s, BEBIT(in, 17), is_encrypted) << (17 ^ 24);
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ret |= crypto1_bit(s, BEBIT(in, 18), is_encrypted) << (18 ^ 24);
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ret |= crypto1_bit(s, BEBIT(in, 19), is_encrypted) << (19 ^ 24);
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ret |= crypto1_bit(s, BEBIT(in, 20), is_encrypted) << (20 ^ 24);
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ret |= crypto1_bit(s, BEBIT(in, 21), is_encrypted) << (21 ^ 24);
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ret |= crypto1_bit(s, BEBIT(in, 22), is_encrypted) << (22 ^ 24);
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ret |= crypto1_bit(s, BEBIT(in, 23), is_encrypted) << (23 ^ 24);
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ret |= crypto1_bit(s, BEBIT(in, 24), is_encrypted) << (24 ^ 24);
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ret |= crypto1_bit(s, BEBIT(in, 25), is_encrypted) << (25 ^ 24);
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ret |= crypto1_bit(s, BEBIT(in, 26), is_encrypted) << (26 ^ 24);
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ret |= crypto1_bit(s, BEBIT(in, 27), is_encrypted) << (27 ^ 24);
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ret |= crypto1_bit(s, BEBIT(in, 28), is_encrypted) << (28 ^ 24);
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ret |= crypto1_bit(s, BEBIT(in, 29), is_encrypted) << (29 ^ 24);
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ret |= crypto1_bit(s, BEBIT(in, 30), is_encrypted) << (30 ^ 24);
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ret |= crypto1_bit(s, BEBIT(in, 31), is_encrypted) << (31 ^ 24);
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return ret;
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}
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/* prng_successor
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* helper used to obscure the keystream during authentication
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*/
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uint32_t prng_successor(uint32_t x, uint32_t n)
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{
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SWAPENDIAN(x);
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while(n--)
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x = x >> 1 | (x >> 16 ^ x >> 18 ^ x >> 19 ^ x >> 21) << 31;
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return SWAPENDIAN(x);
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}
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