mirror of
https://github.com/DarkFlippers/unleashed-firmware.git
synced 2024-12-30 16:56:41 +03:00
9bf11d9fd2
* fbt: assets builder for apps WIP * fbt: automatically building private fap assets * docs: details on how to use image assets * fbt: renamed fap_assets -> fap_icons * fbt: support for fap_extbuild field * docs: info on fap_extbuild * fbt: added --proxy-env parame ter * fbt: made firmware_cdb & updater_cdb targets always available * fbt: renamed fap_icons -> fap_icon_assets * fbt: deprecated firmware_* target names for faps; new alias is "fap_APPID" * fbt: changed intermediate file locations for external apps * fbt: support for fap_private_libs; docs: updates * restored mbedtls as global lib * scripts: lint.py: skip "lib" subfolder * fbt: Sanity checks for building advanced faps as part of fw * docs: info on fap_private_libs; fbt: optimized *.fam indexing * fbt: cleanup; samples: added sample_icons app * fbt: moved example app to applications/examples * linter fix * docs: readme fixes * added applications/examples/application.fam stub * docs: more info on private libs Co-authored-by: あく <alleteam@gmail.com>
233 lines
7.9 KiB
C
233 lines
7.9 KiB
C
//-----------------------------------------------------------------------------
|
||
// Borrowed initially from https://github.com/holiman/loclass
|
||
// Copyright (C) 2014 Martin Holst Swende
|
||
// Copyright (C) Proxmark3 contributors. See AUTHORS.md for details.
|
||
//
|
||
// This program 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 3 of the License, 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.
|
||
//
|
||
// See LICENSE.txt for the text of the license.
|
||
//-----------------------------------------------------------------------------
|
||
// WARNING
|
||
//
|
||
// THIS CODE IS CREATED FOR EXPERIMENTATION AND EDUCATIONAL USE ONLY.
|
||
//
|
||
// USAGE OF THIS CODE IN OTHER WAYS MAY INFRINGE UPON THE INTELLECTUAL
|
||
// PROPERTY OF OTHER PARTIES, SUCH AS INSIDE SECURE AND HID GLOBAL,
|
||
// AND MAY EXPOSE YOU TO AN INFRINGEMENT ACTION FROM THOSE PARTIES.
|
||
//
|
||
// THIS CODE SHOULD NEVER BE USED TO INFRINGE PATENTS OR INTELLECTUAL PROPERTY RIGHTS.
|
||
//-----------------------------------------------------------------------------
|
||
// It is a reconstruction of the cipher engine used in iClass, and RFID techology.
|
||
//
|
||
// The implementation is based on the work performed by
|
||
// Flavio D. Garcia, Gerhard de Koning Gans, Roel Verdult and
|
||
// Milosch Meriac in the paper "Dismantling IClass".
|
||
//-----------------------------------------------------------------------------
|
||
#include "optimized_elite.h"
|
||
|
||
#include <stdint.h>
|
||
#include <stdbool.h>
|
||
#include <string.h>
|
||
#include <mbedtls/des.h>
|
||
#include "optimized_ikeys.h"
|
||
|
||
/**
|
||
* @brief Permutes a key from standard NIST format to Iclass specific format
|
||
* from http://www.proxmark.org/forum/viewtopic.php?pid=11220#p11220
|
||
*
|
||
* If you loclass_permute [6c 8d 44 f9 2a 2d 01 bf] you get [8a 0d b9 88 bb a7 90 ea] as shown below.
|
||
*
|
||
* 1 0 1 1 1 1 1 1 bf
|
||
* 0 0 0 0 0 0 0 1 01
|
||
* 0 0 1 0 1 1 0 1 2d
|
||
* 0 0 1 0 1 0 1 0 2a
|
||
* 1 1 1 1 1 0 0 1 f9
|
||
* 0 1 0 0 0 1 0 0 44
|
||
* 1 0 0 0 1 1 0 1 8d
|
||
* 0 1 1 0 1 1 0 0 6c
|
||
*
|
||
* 8 0 b 8 b a 9 e
|
||
* a d 9 8 b 7 0 a
|
||
*
|
||
* @param key
|
||
* @param dest
|
||
*/
|
||
void loclass_permutekey(const uint8_t key[8], uint8_t dest[8]) {
|
||
int i;
|
||
for(i = 0; i < 8; i++) {
|
||
dest[i] = (((key[7] & (0x80 >> i)) >> (7 - i)) << 7) |
|
||
(((key[6] & (0x80 >> i)) >> (7 - i)) << 6) |
|
||
(((key[5] & (0x80 >> i)) >> (7 - i)) << 5) |
|
||
(((key[4] & (0x80 >> i)) >> (7 - i)) << 4) |
|
||
(((key[3] & (0x80 >> i)) >> (7 - i)) << 3) |
|
||
(((key[2] & (0x80 >> i)) >> (7 - i)) << 2) |
|
||
(((key[1] & (0x80 >> i)) >> (7 - i)) << 1) |
|
||
(((key[0] & (0x80 >> i)) >> (7 - i)) << 0);
|
||
}
|
||
}
|
||
/**
|
||
* Permutes a key from iclass specific format to NIST format
|
||
* @brief loclass_permutekey_rev
|
||
* @param key
|
||
* @param dest
|
||
*/
|
||
void loclass_permutekey_rev(const uint8_t key[8], uint8_t dest[8]) {
|
||
int i;
|
||
for(i = 0; i < 8; i++) {
|
||
dest[7 - i] = (((key[0] & (0x80 >> i)) >> (7 - i)) << 7) |
|
||
(((key[1] & (0x80 >> i)) >> (7 - i)) << 6) |
|
||
(((key[2] & (0x80 >> i)) >> (7 - i)) << 5) |
|
||
(((key[3] & (0x80 >> i)) >> (7 - i)) << 4) |
|
||
(((key[4] & (0x80 >> i)) >> (7 - i)) << 3) |
|
||
(((key[5] & (0x80 >> i)) >> (7 - i)) << 2) |
|
||
(((key[6] & (0x80 >> i)) >> (7 - i)) << 1) |
|
||
(((key[7] & (0x80 >> i)) >> (7 - i)) << 0);
|
||
}
|
||
}
|
||
|
||
/**
|
||
* Helper function for loclass_hash1
|
||
* @brief loclass_rr
|
||
* @param val
|
||
* @return
|
||
*/
|
||
static uint8_t loclass_rr(uint8_t val) {
|
||
return val >> 1 | ((val & 1) << 7);
|
||
}
|
||
|
||
/**
|
||
* Helper function for loclass_hash1
|
||
* @brief rl
|
||
* @param val
|
||
* @return
|
||
*/
|
||
static uint8_t loclass_rl(uint8_t val) {
|
||
return val << 1 | ((val & 0x80) >> 7);
|
||
}
|
||
|
||
/**
|
||
* Helper function for loclass_hash1
|
||
* @brief loclass_swap
|
||
* @param val
|
||
* @return
|
||
*/
|
||
static uint8_t loclass_swap(uint8_t val) {
|
||
return ((val >> 4) & 0xFF) | ((val & 0xFF) << 4);
|
||
}
|
||
|
||
/**
|
||
* Hash1 takes CSN as input, and determines what bytes in the keytable will be used
|
||
* when constructing the K_sel.
|
||
* @param csn the CSN used
|
||
* @param k output
|
||
*/
|
||
void loclass_hash1(const uint8_t csn[], uint8_t k[]) {
|
||
k[0] = csn[0] ^ csn[1] ^ csn[2] ^ csn[3] ^ csn[4] ^ csn[5] ^ csn[6] ^ csn[7];
|
||
k[1] = csn[0] + csn[1] + csn[2] + csn[3] + csn[4] + csn[5] + csn[6] + csn[7];
|
||
k[2] = loclass_rr(loclass_swap(csn[2] + k[1]));
|
||
k[3] = loclass_rl(loclass_swap(csn[3] + k[0]));
|
||
k[4] = ~loclass_rr(csn[4] + k[2]) + 1;
|
||
k[5] = ~loclass_rl(csn[5] + k[3]) + 1;
|
||
k[6] = loclass_rr(csn[6] + (k[4] ^ 0x3c));
|
||
k[7] = loclass_rl(csn[7] + (k[5] ^ 0xc3));
|
||
|
||
k[7] &= 0x7F;
|
||
k[6] &= 0x7F;
|
||
k[5] &= 0x7F;
|
||
k[4] &= 0x7F;
|
||
k[3] &= 0x7F;
|
||
k[2] &= 0x7F;
|
||
k[1] &= 0x7F;
|
||
k[0] &= 0x7F;
|
||
}
|
||
/**
|
||
Definition 14. Define the rotate key function loclass_rk : (F 82 ) 8 × N → (F 82 ) 8 as
|
||
loclass_rk(x [0] . . . x [7] , 0) = x [0] . . . x [7]
|
||
loclass_rk(x [0] . . . x [7] , n + 1) = loclass_rk(loclass_rl(x [0] ) . . . loclass_rl(x [7] ), n)
|
||
**/
|
||
static void loclass_rk(uint8_t* key, uint8_t n, uint8_t* outp_key) {
|
||
memcpy(outp_key, key, 8);
|
||
uint8_t j;
|
||
while(n-- > 0) {
|
||
for(j = 0; j < 8; j++) outp_key[j] = loclass_rl(outp_key[j]);
|
||
}
|
||
return;
|
||
}
|
||
|
||
static mbedtls_des_context loclass_ctx_enc;
|
||
static mbedtls_des_context loclass_ctx_dec;
|
||
|
||
static void loclass_desdecrypt_iclass(uint8_t* iclass_key, uint8_t* input, uint8_t* output) {
|
||
uint8_t key_std_format[8] = {0};
|
||
loclass_permutekey_rev(iclass_key, key_std_format);
|
||
mbedtls_des_setkey_dec(&loclass_ctx_dec, key_std_format);
|
||
mbedtls_des_crypt_ecb(&loclass_ctx_dec, input, output);
|
||
}
|
||
|
||
static void loclass_desencrypt_iclass(uint8_t* iclass_key, uint8_t* input, uint8_t* output) {
|
||
uint8_t key_std_format[8] = {0};
|
||
loclass_permutekey_rev(iclass_key, key_std_format);
|
||
mbedtls_des_setkey_enc(&loclass_ctx_enc, key_std_format);
|
||
mbedtls_des_crypt_ecb(&loclass_ctx_enc, input, output);
|
||
}
|
||
|
||
/**
|
||
* @brief Insert uint8_t[8] custom master key to calculate hash2 and return key_select.
|
||
* @param key unpermuted custom key
|
||
* @param loclass_hash1 loclass_hash1
|
||
* @param key_sel output key_sel=h[loclass_hash1[i]]
|
||
*/
|
||
void hash2(uint8_t* key64, uint8_t* outp_keytable) {
|
||
/**
|
||
*Expected:
|
||
* High Security Key Table
|
||
|
||
00 F1 35 59 A1 0D 5A 26 7F 18 60 0B 96 8A C0 25 C1
|
||
10 BF A1 3B B0 FF 85 28 75 F2 1F C6 8F 0E 74 8F 21
|
||
20 14 7A 55 16 C8 A9 7D B3 13 0C 5D C9 31 8D A9 B2
|
||
30 A3 56 83 0F 55 7E DE 45 71 21 D2 6D C1 57 1C 9C
|
||
40 78 2F 64 51 42 7B 64 30 FA 26 51 76 D3 E0 FB B6
|
||
50 31 9F BF 2F 7E 4F 94 B4 BD 4F 75 91 E3 1B EB 42
|
||
60 3F 88 6F B8 6C 2C 93 0D 69 2C D5 20 3C C1 61 95
|
||
70 43 08 A0 2F FE B3 26 D7 98 0B 34 7B 47 70 A0 AB
|
||
|
||
**** The 64-bit HS Custom Key Value = 5B7C62C491C11B39 ******/
|
||
uint8_t key64_negated[8] = {0};
|
||
uint8_t z[8][8] = {{0}, {0}};
|
||
uint8_t temp_output[8] = {0};
|
||
|
||
//calculate complement of key
|
||
int i;
|
||
for(i = 0; i < 8; i++) key64_negated[i] = ~key64[i];
|
||
|
||
// Once again, key is on iclass-format
|
||
loclass_desencrypt_iclass(key64, key64_negated, z[0]);
|
||
|
||
uint8_t y[8][8] = {{0}, {0}};
|
||
|
||
// y[0]=DES_dec(z[0],~key)
|
||
// Once again, key is on iclass-format
|
||
loclass_desdecrypt_iclass(z[0], key64_negated, y[0]);
|
||
|
||
for(i = 1; i < 8; i++) {
|
||
loclass_rk(key64, i, temp_output);
|
||
loclass_desdecrypt_iclass(temp_output, z[i - 1], z[i]);
|
||
loclass_desencrypt_iclass(temp_output, y[i - 1], y[i]);
|
||
}
|
||
|
||
if(outp_keytable != NULL) {
|
||
for(i = 0; i < 8; i++) {
|
||
memcpy(outp_keytable + i * 16, y[i], 8);
|
||
memcpy(outp_keytable + 8 + i * 16, z[i], 8);
|
||
}
|
||
}
|
||
}
|