mirror of
https://github.com/DarkFlippers/unleashed-firmware
synced 2024-11-27 15:00:46 +00:00
eafeefb843
* rfal: add new data exchange function * core: add FURI_BIT to common defines * furi_hal_nfc: add data exchange with custom patiry bits * lib: extend nfc common API * assets: add mf classic dictionary * lib: introduce mifare classic library * nfc: add dictionary reader helper * nfc worker: add worker events, add mifare classic read * nfc: rework scenes with worker events * nfc: add read mifare classic GUI * nfc device: add mifare classic save * nfc: add dictionary open fail scene * nfc: mention resources * stream: fix stream read line * subghz: rework file read with fixed stream_read_line * furi_hal_nfc: decrease communication timeout * nfc: rework keys load from dictionary with file_stream * nfc: add read mifare classic suggestion * nfc: fix mifare classic read view * nfc: fix index size * nfc: add switch to no dictionary found scene * nfc: add mifare classic load * nfc: improve read mifare classic design * mifare_classic: add proxmark3 mention * nfc: format sources * nfc: fix typos, add documentation
75 lines
2.1 KiB
C
75 lines
2.1 KiB
C
#include "crypto1.h"
|
|
#include "nfc_util.h"
|
|
#include <furi.h>
|
|
|
|
// Algorithm from https://github.com/RfidResearchGroup/proxmark3.git
|
|
|
|
#define SWAPENDIAN(x) (x = (x >> 8 & 0xff00ff) | (x & 0xff00ff) << 8, x = x >> 16 | x << 16)
|
|
#define LF_POLY_ODD (0x29CE5C)
|
|
#define LF_POLY_EVEN (0x870804)
|
|
|
|
#define BEBIT(x, n) FURI_BIT(x, (n) ^ 24)
|
|
|
|
void crypto1_reset(Crypto1* crypto1) {
|
|
furi_assert(crypto1);
|
|
crypto1->even = 0;
|
|
crypto1->odd = 0;
|
|
}
|
|
|
|
void crypto1_init(Crypto1* crypto1, uint64_t key) {
|
|
furi_assert(crypto1);
|
|
crypto1->even = 0;
|
|
crypto1->odd = 0;
|
|
for(int8_t i = 47; i > 0; i -= 2) {
|
|
crypto1->odd = crypto1->odd << 1 | FURI_BIT(key, (i - 1) ^ 7);
|
|
crypto1->even = crypto1->even << 1 | FURI_BIT(key, i ^ 7);
|
|
}
|
|
}
|
|
|
|
uint32_t crypto1_filter(uint32_t in) {
|
|
uint32_t out = 0;
|
|
out = 0xf22c0 >> (in & 0xf) & 16;
|
|
out |= 0x6c9c0 >> (in >> 4 & 0xf) & 8;
|
|
out |= 0x3c8b0 >> (in >> 8 & 0xf) & 4;
|
|
out |= 0x1e458 >> (in >> 12 & 0xf) & 2;
|
|
out |= 0x0d938 >> (in >> 16 & 0xf) & 1;
|
|
return FURI_BIT(0xEC57E80A, out);
|
|
}
|
|
|
|
uint8_t crypto1_bit(Crypto1* crypto1, uint8_t in, int is_encrypted) {
|
|
furi_assert(crypto1);
|
|
uint8_t out = crypto1_filter(crypto1->odd);
|
|
uint32_t feed = out & (!!is_encrypted);
|
|
feed ^= !!in;
|
|
feed ^= LF_POLY_ODD & crypto1->odd;
|
|
feed ^= LF_POLY_EVEN & crypto1->even;
|
|
crypto1->even = crypto1->even << 1 | (nfc_util_even_parity32(feed));
|
|
|
|
FURI_SWAP(crypto1->odd, crypto1->even);
|
|
return out;
|
|
}
|
|
|
|
uint8_t crypto1_byte(Crypto1* crypto1, uint8_t in, int is_encrypted) {
|
|
furi_assert(crypto1);
|
|
uint8_t out = 0;
|
|
for(uint8_t i = 0; i < 8; i++) {
|
|
out |= crypto1_bit(crypto1, FURI_BIT(in, i), is_encrypted) << i;
|
|
}
|
|
return out;
|
|
}
|
|
|
|
uint8_t crypto1_word(Crypto1* crypto1, uint32_t in, int is_encrypted) {
|
|
furi_assert(crypto1);
|
|
uint32_t out = 0;
|
|
for(uint8_t i = 0; i < 32; i++) {
|
|
out |= crypto1_bit(crypto1, BEBIT(in, i), is_encrypted) << (24 ^ i);
|
|
}
|
|
return out;
|
|
}
|
|
|
|
uint32_t prng_successor(uint32_t x, uint32_t n) {
|
|
SWAPENDIAN(x);
|
|
while(n--) x = x >> 1 | (x >> 16 ^ x >> 18 ^ x >> 19 ^ x >> 21) << 31;
|
|
|
|
return SWAPENDIAN(x);
|
|
}
|