mirror of
https://github.com/RfidResearchGroup/proxmark3.git
synced 2025-08-19 21:03:48 -07:00
Extract gallagher encoding/decoding
Change input parameters to be `arg_u640` so that we can check they are the right lengths (and not have them silently truncated)
This commit is contained in:
Matt Moran
parent
ac216b6cbd
commit
f0b82c6311
7 changed files with 176 additions and 122 deletions
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@ -234,6 +234,7 @@ set (TARGET_SOURCES
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${PM3_ROOT}/client/src/mifare/desfiresecurechan.c
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${PM3_ROOT}/client/src/mifare/desfirecore.c
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${PM3_ROOT}/client/src/mifare/desfiretest.c
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${PM3_ROOT}/client/src/mifare/gallaghercore.c
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${PM3_ROOT}/client/src/uart/uart_posix.c
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${PM3_ROOT}/client/src/uart/uart_win32.c
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${PM3_ROOT}/client/src/ui/overlays.ui
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@ -612,6 +612,7 @@ SRCS = mifare/aiddesfire.c \
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mifare/desfirecore.c \
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mifare/desfiresecurechan.c \
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mifare/desfiretest.c \
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mifare/gallaghercore.c \
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mifare/mad.c \
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mifare/mfkey.c \
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mifare/mifare4.c \
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@ -99,6 +99,7 @@ add_library(pm3rrg_rdv4 SHARED
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${PM3_ROOT}/client/src/mifare/desfiresecurechan.c
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${PM3_ROOT}/client/src/mifare/desfirecore.c
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${PM3_ROOT}/client/src/mifare/desfiretest.c
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${PM3_ROOT}/client/src/mifare/gallaghercore.c
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${PM3_ROOT}/client/src/uart/uart_posix.c
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${PM3_ROOT}/client/src/uart/uart_win32.c
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${PM3_ROOT}/client/src/ui/overlays.ui
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@ -233,6 +233,7 @@ set (TARGET_SOURCES
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${PM3_ROOT}/client/src/mifare/desfiresecurechan.c
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${PM3_ROOT}/client/src/mifare/desfirecore.c
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${PM3_ROOT}/client/src/mifare/desfiretest.c
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${PM3_ROOT}/client/src/mifare/gallaghercore.c
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${PM3_ROOT}/client/src/uart/uart_posix.c
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${PM3_ROOT}/client/src/uart/uart_win32.c
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${PM3_ROOT}/client/src/ui/overlays.ui
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@ -9,7 +9,10 @@
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// ASK/MAN, RF/32, 96 bits long (unknown cs) (0x00088060)
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// sample Q5 , ASK RF/32, STT, 96 bits (3blocks) ( 0x9000F006)
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//-----------------------------------------------------------------------------
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// Modified by: Matt Moran (@DarkMatterMatt), 2021
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#include "cmdlfgallagher.h"
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#include "mifare/gallaghercore.h"
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#include <string.h> // memcpy
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#include <ctype.h> // tolower
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#include <stdio.h>
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@ -29,56 +32,6 @@
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static int CmdHelp(const char *Cmd);
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static void scramble(uint8_t *arr, uint8_t len) {
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uint8_t lut[] = {
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0xa3, 0xb0, 0x80, 0xc6, 0xb2, 0xf4, 0x5c, 0x6c, 0x81, 0xf1, 0xbb, 0xeb, 0x55, 0x67, 0x3c, 0x05,
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0x1a, 0x0e, 0x61, 0xf6, 0x22, 0xce, 0xaa, 0x8f, 0xbd, 0x3b, 0x1f, 0x5e, 0x44, 0x04, 0x51, 0x2e,
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0x4d, 0x9a, 0x84, 0xea, 0xf8, 0x66, 0x74, 0x29, 0x7f, 0x70, 0xd8, 0x31, 0x7a, 0x6d, 0xa4, 0x00,
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0x82, 0xb9, 0x5f, 0xb4, 0x16, 0xab, 0xff, 0xc2, 0x39, 0xdc, 0x19, 0x65, 0x57, 0x7c, 0x20, 0xfa,
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0x5a, 0x49, 0x13, 0xd0, 0xfb, 0xa8, 0x91, 0x73, 0xb1, 0x33, 0x18, 0xbe, 0x21, 0x72, 0x48, 0xb6,
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0xdb, 0xa0, 0x5d, 0xcc, 0xe6, 0x17, 0x27, 0xe5, 0xd4, 0x53, 0x42, 0xf3, 0xdd, 0x7b, 0x24, 0xac,
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0x2b, 0x58, 0x1e, 0xa7, 0xe7, 0x86, 0x40, 0xd3, 0x98, 0x97, 0x71, 0xcb, 0x3a, 0x0f, 0x01, 0x9b,
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0x6e, 0x1b, 0xfc, 0x34, 0xa6, 0xda, 0x07, 0x0c, 0xae, 0x37, 0xca, 0x54, 0xfd, 0x26, 0xfe, 0x0a,
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0x45, 0xa2, 0x2a, 0xc4, 0x12, 0x0d, 0xf5, 0x4f, 0x69, 0xe0, 0x8a, 0x77, 0x60, 0x3f, 0x99, 0x95,
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0xd2, 0x38, 0x36, 0x62, 0xb7, 0x32, 0x7e, 0x79, 0xc0, 0x46, 0x93, 0x2f, 0xa5, 0xba, 0x5b, 0xaf,
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0x52, 0x1d, 0xc3, 0x75, 0xcf, 0xd6, 0x4c, 0x83, 0xe8, 0x3d, 0x30, 0x4e, 0xbc, 0x08, 0x2d, 0x09,
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0x06, 0xd9, 0x25, 0x9e, 0x89, 0xf2, 0x96, 0x88, 0xc1, 0x8c, 0x94, 0x0b, 0x28, 0xf0, 0x47, 0x63,
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0xd5, 0xb3, 0x68, 0x56, 0x9c, 0xf9, 0x6f, 0x41, 0x50, 0x85, 0x8b, 0x9d, 0x59, 0xbf, 0x9f, 0xe2,
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0x8e, 0x6a, 0x11, 0x23, 0xa1, 0xcd, 0xb5, 0x7d, 0xc7, 0xa9, 0xc8, 0xef, 0xdf, 0x02, 0xb8, 0x03,
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0x6b, 0x35, 0x3e, 0x2c, 0x76, 0xc9, 0xde, 0x1c, 0x4b, 0xd1, 0xed, 0x14, 0xc5, 0xad, 0xe9, 0x64,
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0x4a, 0xec, 0x8d, 0xf7, 0x10, 0x43, 0x78, 0x15, 0x87, 0xe4, 0xd7, 0x92, 0xe1, 0xee, 0xe3, 0x90
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};
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for (int i = 0; i < len; i++) {
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arr[i] = lut[arr[i]];
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}
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}
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static void descramble(uint8_t *arr, uint8_t len) {
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uint8_t lut[] = {
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0x2f, 0x6e, 0xdd, 0xdf, 0x1d, 0x0f, 0xb0, 0x76, 0xad, 0xaf, 0x7f, 0xbb, 0x77, 0x85, 0x11, 0x6d,
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0xf4, 0xd2, 0x84, 0x42, 0xeb, 0xf7, 0x34, 0x55, 0x4a, 0x3a, 0x10, 0x71, 0xe7, 0xa1, 0x62, 0x1a,
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0x3e, 0x4c, 0x14, 0xd3, 0x5e, 0xb2, 0x7d, 0x56, 0xbc, 0x27, 0x82, 0x60, 0xe3, 0xae, 0x1f, 0x9b,
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0xaa, 0x2b, 0x95, 0x49, 0x73, 0xe1, 0x92, 0x79, 0x91, 0x38, 0x6c, 0x19, 0x0e, 0xa9, 0xe2, 0x8d,
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0x66, 0xc7, 0x5a, 0xf5, 0x1c, 0x80, 0x99, 0xbe, 0x4e, 0x41, 0xf0, 0xe8, 0xa6, 0x20, 0xab, 0x87,
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0xc8, 0x1e, 0xa0, 0x59, 0x7b, 0x0c, 0xc3, 0x3c, 0x61, 0xcc, 0x40, 0x9e, 0x06, 0x52, 0x1b, 0x32,
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0x8c, 0x12, 0x93, 0xbf, 0xef, 0x3b, 0x25, 0x0d, 0xc2, 0x88, 0xd1, 0xe0, 0x07, 0x2d, 0x70, 0xc6,
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0x29, 0x6a, 0x4d, 0x47, 0x26, 0xa3, 0xe4, 0x8b, 0xf6, 0x97, 0x2c, 0x5d, 0x3d, 0xd7, 0x96, 0x28,
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0x02, 0x08, 0x30, 0xa7, 0x22, 0xc9, 0x65, 0xf8, 0xb7, 0xb4, 0x8a, 0xca, 0xb9, 0xf2, 0xd0, 0x17,
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0xff, 0x46, 0xfb, 0x9a, 0xba, 0x8f, 0xb6, 0x69, 0x68, 0x8e, 0x21, 0x6f, 0xc4, 0xcb, 0xb3, 0xce,
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0x51, 0xd4, 0x81, 0x00, 0x2e, 0x9c, 0x74, 0x63, 0x45, 0xd9, 0x16, 0x35, 0x5f, 0xed, 0x78, 0x9f,
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0x01, 0x48, 0x04, 0xc1, 0x33, 0xd6, 0x4f, 0x94, 0xde, 0x31, 0x9d, 0x0a, 0xac, 0x18, 0x4b, 0xcd,
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0x98, 0xb8, 0x37, 0xa2, 0x83, 0xec, 0x03, 0xd8, 0xda, 0xe5, 0x7a, 0x6b, 0x53, 0xd5, 0x15, 0xa4,
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0x43, 0xe9, 0x90, 0x67, 0x58, 0xc0, 0xa5, 0xfa, 0x2a, 0xb1, 0x75, 0x50, 0x39, 0x5c, 0xe6, 0xdc,
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0x89, 0xfc, 0xcf, 0xfe, 0xf9, 0x57, 0x54, 0x64, 0xa8, 0xee, 0x23, 0x0b, 0xf1, 0xea, 0xfd, 0xdb,
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0xbd, 0x09, 0xb5, 0x5b, 0x05, 0x86, 0x13, 0xf3, 0x24, 0xc5, 0x3f, 0x44, 0x72, 0x7c, 0x7e, 0x36
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};
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for (int i = 0; i < len; i++) {
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arr[i] = lut[arr[i]];
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}
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}
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//see ASK/MAN Demod for what args are accepted
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int demodGallagher(bool verbose) {
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(void) verbose; // unused so far
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@ -113,6 +66,7 @@ int demodGallagher(bool verbose) {
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// bytes
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uint8_t arr[8] = {0};
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for (int i = 0, pos = 0; i < ARRAYLEN(arr); i++) {
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// first 16 bits are the 7FEA prefix, then every 9th bit is a checksum-bit for the preceding byte
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pos = 16 + (9 * i);
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arr[i] = bytebits_to_byte(g_DemodBuffer + pos, 8);
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}
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@ -121,22 +75,15 @@ int demodGallagher(bool verbose) {
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uint8_t crc = bytebits_to_byte(g_DemodBuffer + 16 + (9 * 8), 8);
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uint8_t calc_crc = CRC8Cardx(arr, ARRAYLEN(arr));
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descramble(arr, ARRAYLEN(arr));
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uint8_t region_code, issue_level;
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uint16_t facility_code;
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uint32_t card_number;
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// 4bit region code
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uint8_t rc = (arr[3] & 0x1E) >> 1;
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decodeCardholderCredentials(arr, ®ion_code, &facility_code, &card_number, &issue_level);
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// 16bit FC
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uint16_t fc = (arr[5] & 0x0F) << 12 | arr[1] << 4 | ((arr[7] >> 4) & 0x0F);
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// 24bit CN
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uint32_t cn = arr[0] << 16 | (arr[4] & 0x1F) << 11 | arr[2] << 3 | (arr[3] & 0xE0) >> 5;
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// 4bit issue level
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uint8_t il = arr[7] & 0x0F;
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PrintAndLogEx(SUCCESS, "GALLAGHER - Region: " _GREEN_("%u") " FC: " _GREEN_("%u") " CN: " _GREEN_("%u") " Issue Level: " _GREEN_("%u"), rc, fc, cn, il);
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PrintAndLogEx(SUCCESS, " Displayed: " _GREEN_("%C%u"), rc + 'A', fc);
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PrintAndLogEx(SUCCESS, "GALLAGHER - Region: " _GREEN_("%u") " Facility: " _GREEN_("%u") " Card No.: " _GREEN_("%u") " Issue Level: " _GREEN_("%u"),
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region_code, facility_code, card_number, issue_level);
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PrintAndLogEx(SUCCESS, " Displayed: " _GREEN_("%C%u"), region_code + 'A', facility_code);
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PrintAndLogEx(SUCCESS, " Raw: %08X%08X%08X", raw1, raw2, raw3);
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PrintAndLogEx(SUCCESS, " CRC: %02X - %02X (%s)", crc, calc_crc, (crc == calc_crc) ? "ok" : "fail");
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return PM3_SUCCESS;
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@ -185,34 +132,6 @@ static int CmdGallagherReader(const char *Cmd) {
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return PM3_SUCCESS;
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}
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static bool isValidGallagherParams(int8_t rc, int32_t fc, int32_t cn, int8_t il) {
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bool isValid = true;
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// if one is set, all must be set
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if (rc < 0 || fc < 0 || cn < 0 || il < 0) {
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PrintAndLogEx(FAILED, "If rc/fc/cn/il is specified, all must be set");
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isValid = false;
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}
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// validate input
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if (rc > 0x0f) {
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PrintAndLogEx(FAILED, "Region code must be less than 16 (4 bits)");
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isValid = false;
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}
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if (fc > 0xffff) {
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PrintAndLogEx(FAILED, "Facility code must be less than 65536 (2 bytes)");
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isValid = false;
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}
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if (cn > 0xffffff) {
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PrintAndLogEx(FAILED, "Card number must be less than 16777216 (3 bytes)");
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isValid = false;
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}
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if (il > 0x0f) {
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PrintAndLogEx(FAILED, "Issue level must be less than 16 (4 bits)");
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isValid = false;
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}
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return isValid;
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}
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static void setBitsInBlocks(uint32_t *blocks, uint8_t *pos, uint32_t data, uint8_t data_len) {
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for (int i = data_len - 1; i >= 0; i--) {
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uint8_t blk = *pos / 32;
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@ -225,18 +144,8 @@ static void setBitsInBlocks(uint32_t *blocks, uint8_t *pos, uint32_t data, uint8
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static void createBlocks(uint32_t *blocks, uint8_t rc, uint16_t fc, uint32_t cn, uint8_t il) {
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// put data into the correct places (Gallagher obfuscation)
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uint8_t arr[8] = {0};
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arr[0] = (cn & 0xffffff) >> 16;
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arr[1] = (fc & 0xfff) >> 4;
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arr[2] = (cn & 0x7ff) >> 3;
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arr[3] = (cn & 0x7) << 5 | (rc & 0xf) << 1;
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arr[4] = (cn & 0xffff) >> 11;
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arr[5] = (fc & 0xffff) >> 12;
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arr[6] = 0;
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arr[7] = (fc & 0xf) << 4 | (il & 0xf);
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// more obfuscation
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scramble(arr, ARRAYLEN(arr));
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uint8_t arr[8] = { 0x00 };
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encodeCardholderCredentials(arr, rc, fc, cn, il);
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blocks[0] = blocks[1] = blocks[2] = 0;
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uint8_t pos = 0;
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@ -273,10 +182,10 @@ static int CmdGallagherClone(const char *Cmd) {
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arg_str0("r", "raw", "<hex>", "raw hex data. 12 bytes max"),
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arg_lit0(NULL, "q5", "optional - specify writing to Q5/T5555 tag"),
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arg_lit0(NULL, "em", "optional - specify writing to EM4305/4469 tag"),
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arg_int0(NULL, "rc", "<decimal>", "Region code. 4 bits max"),
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arg_int0(NULL, "fc", "<decimal>", "Facility code. 2 bytes max"),
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arg_int0(NULL, "cn", "<decimal>", "Card number. 3 bytes max"),
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arg_int0(NULL, "il", "<decimal>", "Issue level. 4 bits max"),
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arg_u64_0(NULL, "rc", "<decimal>", "Region code. 4 bits max"),
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arg_u64_0(NULL, "fc", "<decimal>", "Facility code. 2 bytes max"),
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arg_u64_0(NULL, "cn", "<decimal>", "Card number. 3 bytes max"),
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arg_u64_0(NULL, "il", "<decimal>", "Issue level. 4 bits max"),
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arg_param_end
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};
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CLIExecWithReturn(ctx, Cmd, argtable, false);
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@ -292,10 +201,10 @@ static int CmdGallagherClone(const char *Cmd) {
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bool q5 = arg_get_lit(ctx, 2);
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bool em = arg_get_lit(ctx, 3);
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int16_t region_code = arg_get_int_def(ctx, 4, -1);
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int32_t facility_code = arg_get_int_def(ctx, 5, -1);
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uint64_t card_number = arg_get_int_def(ctx, 6, -1);
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uint32_t issue_level = arg_get_int_def(ctx, 7, -1);
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uint64_t region_code = arg_get_u64_def(ctx, 4, -1); // uint16, will be validated later
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uint64_t facility_code = arg_get_u64_def(ctx, 5, -1); // uint32, will be validated later
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uint64_t card_number = arg_get_u64_def(ctx, 6, -1); // uint64
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uint64_t issue_level = arg_get_u64_def(ctx, 7, -1); // uint32, will be validated later
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CLIParserFree(ctx);
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bool use_raw = raw_len > 0;
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@ -316,7 +225,7 @@ static int CmdGallagherClone(const char *Cmd) {
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PrintAndLogEx(FAILED, "Can't specify both raw and rc/fc/cn/il at the same time");
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return PM3_EINVARG;
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}
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if (!isValidGallagherParams(region_code, facility_code, card_number, issue_level)) {
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if (!isValidGallagherCredentials(region_code, facility_code, card_number, issue_level)) {
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return PM3_EINVARG;
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}
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}
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@ -373,10 +282,10 @@ static int CmdGallagherSim(const char *Cmd) {
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void *argtable[] = {
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arg_param_begin,
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arg_str0("r", "raw", "<hex>", "raw hex data. 12 bytes max"),
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arg_int0(NULL, "rc", "<decimal>", "Region code. 4 bits max"),
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arg_int0(NULL, "fc", "<decimal>", "Facility code. 2 bytes max"),
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arg_int0(NULL, "cn", "<decimal>", "Card number. 3 bytes max"),
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arg_int0(NULL, "il", "<decimal>", "Issue level. 4 bits max"),
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arg_u64_0(NULL, "rc", "<decimal>", "Region code. 4 bits max"),
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arg_u64_0(NULL, "fc", "<decimal>", "Facility code. 2 bytes max"),
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arg_u64_0(NULL, "cn", "<decimal>", "Card number. 3 bytes max"),
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arg_u64_0(NULL, "il", "<decimal>", "Issue level. 4 bits max"),
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arg_param_end
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};
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CLIExecWithReturn(ctx, Cmd, argtable, false);
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@ -391,10 +300,10 @@ static int CmdGallagherSim(const char *Cmd) {
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return PM3_EINVARG;
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}
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int16_t region_code = arg_get_int_def(ctx, 2, -1);
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int32_t facility_code = arg_get_int_def(ctx, 3, -1);
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uint64_t card_number = arg_get_int_def(ctx, 4, -1);
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uint32_t issue_level = arg_get_int_def(ctx, 5, -1);
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uint64_t region_code = arg_get_u64_def(ctx, 2, -1); // uint16, will be validated later
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uint64_t facility_code = arg_get_u64_def(ctx, 3, -1); // uint32, will be validated later
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uint64_t card_number = arg_get_u64_def(ctx, 4, -1); // uint64
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uint64_t issue_level = arg_get_u64_def(ctx, 5, -1); // uint32, will be validated later
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CLIParserFree(ctx);
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bool use_raw = raw_len > 0;
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|
|
@ -410,7 +319,7 @@ static int CmdGallagherSim(const char *Cmd) {
|
|||
PrintAndLogEx(FAILED, "Can't specify both raw and rc/fc/cn/il at the same time");
|
||||
return PM3_EINVARG;
|
||||
}
|
||||
if (!isValidGallagherParams(region_code, facility_code, card_number, issue_level)) {
|
||||
if (!isValidGallagherCredentials(region_code, facility_code, card_number, issue_level)) {
|
||||
return PM3_EINVARG;
|
||||
}
|
||||
}
|
||||
|
|
|
|||
119
client/src/mifare/gallaghercore.c
Normal file
119
client/src/mifare/gallaghercore.c
Normal file
|
|
@ -0,0 +1,119 @@
|
|||
/**
|
||||
* Matt Moran (@DarkMatterMatt), 2021
|
||||
* -----------------------------------------------------------------------------
|
||||
* This program is free software: you can redistribute it and/or modify it
|
||||
* under the terms of the GNU Lesser General Public License as published by the
|
||||
* Free Software Foundation, either version 3 of the License, or (at your
|
||||
* option) any later version.
|
||||
* -----------------------------------------------------------------------------
|
||||
* Common functionality for low/high-frequency GALLAGHER tag encoding & decoding.
|
||||
*/
|
||||
#include "gallaghercore.h"
|
||||
#include "common.h"
|
||||
#include "ui.h"
|
||||
|
||||
static void scramble(uint8_t *arr, uint8_t len) {
|
||||
uint8_t lut[] = {
|
||||
0xa3, 0xb0, 0x80, 0xc6, 0xb2, 0xf4, 0x5c, 0x6c, 0x81, 0xf1, 0xbb, 0xeb, 0x55, 0x67, 0x3c, 0x05,
|
||||
0x1a, 0x0e, 0x61, 0xf6, 0x22, 0xce, 0xaa, 0x8f, 0xbd, 0x3b, 0x1f, 0x5e, 0x44, 0x04, 0x51, 0x2e,
|
||||
0x4d, 0x9a, 0x84, 0xea, 0xf8, 0x66, 0x74, 0x29, 0x7f, 0x70, 0xd8, 0x31, 0x7a, 0x6d, 0xa4, 0x00,
|
||||
0x82, 0xb9, 0x5f, 0xb4, 0x16, 0xab, 0xff, 0xc2, 0x39, 0xdc, 0x19, 0x65, 0x57, 0x7c, 0x20, 0xfa,
|
||||
0x5a, 0x49, 0x13, 0xd0, 0xfb, 0xa8, 0x91, 0x73, 0xb1, 0x33, 0x18, 0xbe, 0x21, 0x72, 0x48, 0xb6,
|
||||
0xdb, 0xa0, 0x5d, 0xcc, 0xe6, 0x17, 0x27, 0xe5, 0xd4, 0x53, 0x42, 0xf3, 0xdd, 0x7b, 0x24, 0xac,
|
||||
0x2b, 0x58, 0x1e, 0xa7, 0xe7, 0x86, 0x40, 0xd3, 0x98, 0x97, 0x71, 0xcb, 0x3a, 0x0f, 0x01, 0x9b,
|
||||
0x6e, 0x1b, 0xfc, 0x34, 0xa6, 0xda, 0x07, 0x0c, 0xae, 0x37, 0xca, 0x54, 0xfd, 0x26, 0xfe, 0x0a,
|
||||
0x45, 0xa2, 0x2a, 0xc4, 0x12, 0x0d, 0xf5, 0x4f, 0x69, 0xe0, 0x8a, 0x77, 0x60, 0x3f, 0x99, 0x95,
|
||||
0xd2, 0x38, 0x36, 0x62, 0xb7, 0x32, 0x7e, 0x79, 0xc0, 0x46, 0x93, 0x2f, 0xa5, 0xba, 0x5b, 0xaf,
|
||||
0x52, 0x1d, 0xc3, 0x75, 0xcf, 0xd6, 0x4c, 0x83, 0xe8, 0x3d, 0x30, 0x4e, 0xbc, 0x08, 0x2d, 0x09,
|
||||
0x06, 0xd9, 0x25, 0x9e, 0x89, 0xf2, 0x96, 0x88, 0xc1, 0x8c, 0x94, 0x0b, 0x28, 0xf0, 0x47, 0x63,
|
||||
0xd5, 0xb3, 0x68, 0x56, 0x9c, 0xf9, 0x6f, 0x41, 0x50, 0x85, 0x8b, 0x9d, 0x59, 0xbf, 0x9f, 0xe2,
|
||||
0x8e, 0x6a, 0x11, 0x23, 0xa1, 0xcd, 0xb5, 0x7d, 0xc7, 0xa9, 0xc8, 0xef, 0xdf, 0x02, 0xb8, 0x03,
|
||||
0x6b, 0x35, 0x3e, 0x2c, 0x76, 0xc9, 0xde, 0x1c, 0x4b, 0xd1, 0xed, 0x14, 0xc5, 0xad, 0xe9, 0x64,
|
||||
0x4a, 0xec, 0x8d, 0xf7, 0x10, 0x43, 0x78, 0x15, 0x87, 0xe4, 0xd7, 0x92, 0xe1, 0xee, 0xe3, 0x90
|
||||
};
|
||||
|
||||
for (int i = 0; i < len; i++) {
|
||||
arr[i] = lut[arr[i]];
|
||||
}
|
||||
}
|
||||
|
||||
static void descramble(uint8_t *arr, uint8_t len) {
|
||||
uint8_t lut[] = {
|
||||
0x2f, 0x6e, 0xdd, 0xdf, 0x1d, 0x0f, 0xb0, 0x76, 0xad, 0xaf, 0x7f, 0xbb, 0x77, 0x85, 0x11, 0x6d,
|
||||
0xf4, 0xd2, 0x84, 0x42, 0xeb, 0xf7, 0x34, 0x55, 0x4a, 0x3a, 0x10, 0x71, 0xe7, 0xa1, 0x62, 0x1a,
|
||||
0x3e, 0x4c, 0x14, 0xd3, 0x5e, 0xb2, 0x7d, 0x56, 0xbc, 0x27, 0x82, 0x60, 0xe3, 0xae, 0x1f, 0x9b,
|
||||
0xaa, 0x2b, 0x95, 0x49, 0x73, 0xe1, 0x92, 0x79, 0x91, 0x38, 0x6c, 0x19, 0x0e, 0xa9, 0xe2, 0x8d,
|
||||
0x66, 0xc7, 0x5a, 0xf5, 0x1c, 0x80, 0x99, 0xbe, 0x4e, 0x41, 0xf0, 0xe8, 0xa6, 0x20, 0xab, 0x87,
|
||||
0xc8, 0x1e, 0xa0, 0x59, 0x7b, 0x0c, 0xc3, 0x3c, 0x61, 0xcc, 0x40, 0x9e, 0x06, 0x52, 0x1b, 0x32,
|
||||
0x8c, 0x12, 0x93, 0xbf, 0xef, 0x3b, 0x25, 0x0d, 0xc2, 0x88, 0xd1, 0xe0, 0x07, 0x2d, 0x70, 0xc6,
|
||||
0x29, 0x6a, 0x4d, 0x47, 0x26, 0xa3, 0xe4, 0x8b, 0xf6, 0x97, 0x2c, 0x5d, 0x3d, 0xd7, 0x96, 0x28,
|
||||
0x02, 0x08, 0x30, 0xa7, 0x22, 0xc9, 0x65, 0xf8, 0xb7, 0xb4, 0x8a, 0xca, 0xb9, 0xf2, 0xd0, 0x17,
|
||||
0xff, 0x46, 0xfb, 0x9a, 0xba, 0x8f, 0xb6, 0x69, 0x68, 0x8e, 0x21, 0x6f, 0xc4, 0xcb, 0xb3, 0xce,
|
||||
0x51, 0xd4, 0x81, 0x00, 0x2e, 0x9c, 0x74, 0x63, 0x45, 0xd9, 0x16, 0x35, 0x5f, 0xed, 0x78, 0x9f,
|
||||
0x01, 0x48, 0x04, 0xc1, 0x33, 0xd6, 0x4f, 0x94, 0xde, 0x31, 0x9d, 0x0a, 0xac, 0x18, 0x4b, 0xcd,
|
||||
0x98, 0xb8, 0x37, 0xa2, 0x83, 0xec, 0x03, 0xd8, 0xda, 0xe5, 0x7a, 0x6b, 0x53, 0xd5, 0x15, 0xa4,
|
||||
0x43, 0xe9, 0x90, 0x67, 0x58, 0xc0, 0xa5, 0xfa, 0x2a, 0xb1, 0x75, 0x50, 0x39, 0x5c, 0xe6, 0xdc,
|
||||
0x89, 0xfc, 0xcf, 0xfe, 0xf9, 0x57, 0x54, 0x64, 0xa8, 0xee, 0x23, 0x0b, 0xf1, 0xea, 0xfd, 0xdb,
|
||||
0xbd, 0x09, 0xb5, 0x5b, 0x05, 0x86, 0x13, 0xf3, 0x24, 0xc5, 0x3f, 0x44, 0x72, 0x7c, 0x7e, 0x36
|
||||
};
|
||||
|
||||
for (int i = 0; i < len; i++) {
|
||||
arr[i] = lut[arr[i]];
|
||||
}
|
||||
}
|
||||
|
||||
void decodeCardholderCredentials(uint8_t *eight_bytes, uint8_t *region_code, uint16_t *facility_code, uint32_t *card_number, uint8_t *issue_level) {
|
||||
uint8_t *arr = eight_bytes;
|
||||
|
||||
descramble(arr, 8);
|
||||
|
||||
// 4bit region code
|
||||
*region_code = (arr[3] & 0x1E) >> 1;
|
||||
|
||||
// 16bit facility code
|
||||
*facility_code = (arr[5] & 0x0F) << 12 | arr[1] << 4 | ((arr[7] >> 4) & 0x0F);
|
||||
|
||||
// 24bit card number
|
||||
*card_number = arr[0] << 16 | (arr[4] & 0x1F) << 11 | arr[2] << 3 | (arr[3] & 0xE0) >> 5;
|
||||
|
||||
// 4bit issue level
|
||||
*issue_level = arr[7] & 0x0F;
|
||||
}
|
||||
|
||||
void encodeCardholderCredentials(uint8_t *eight_bytes, uint8_t region_code, uint16_t facility_code, uint32_t card_number, uint8_t issue_level) {
|
||||
// put data into the correct places (Gallagher obfuscation)
|
||||
eight_bytes[0] = (card_number & 0xffffff) >> 16;
|
||||
eight_bytes[1] = (facility_code & 0xfff) >> 4;
|
||||
eight_bytes[2] = (card_number & 0x7ff) >> 3;
|
||||
eight_bytes[3] = (card_number & 0x7) << 5 | (region_code & 0xf) << 1;
|
||||
eight_bytes[4] = (card_number & 0xffff) >> 11;
|
||||
eight_bytes[5] = (facility_code & 0xffff) >> 12;
|
||||
eight_bytes[6] = 0;
|
||||
eight_bytes[7] = (facility_code & 0xf) << 4 | (issue_level & 0xf);
|
||||
|
||||
// more obfuscation
|
||||
scramble(eight_bytes, 8);
|
||||
}
|
||||
|
||||
bool isValidGallagherCredentials(uint64_t region_code, uint64_t facility_code, uint64_t card_number, uint64_t issue_level) {
|
||||
bool isValid = true;
|
||||
|
||||
// validate input
|
||||
if (region_code > 0x0f) {
|
||||
PrintAndLogEx(FAILED, "Region code must be 0 <= rc <= 15 (4 bits), received: %d", region_code);
|
||||
isValid = false;
|
||||
}
|
||||
if (facility_code > 0xffff) {
|
||||
PrintAndLogEx(FAILED, "Facility code must be 0 <= fc <= 65535 (2 bytes), received: %d", facility_code);
|
||||
isValid = false;
|
||||
}
|
||||
if (card_number > 0xffffff) {
|
||||
PrintAndLogEx(FAILED, "Card number must be 0 <= cn <= 16777215 (3 bytes), received: %d", card_number);
|
||||
isValid = false;
|
||||
}
|
||||
if (issue_level > 0x0f) {
|
||||
PrintAndLogEx(FAILED, "Issue level must be 0 <= il <= 15 (4 bits), received: %d", issue_level);
|
||||
isValid = false;
|
||||
}
|
||||
return isValid;
|
||||
}
|
||||
22
client/src/mifare/gallaghercore.h
Normal file
22
client/src/mifare/gallaghercore.h
Normal file
|
|
@ -0,0 +1,22 @@
|
|||
/**
|
||||
* Matt Moran (@DarkMatterMatt), 2021
|
||||
* -----------------------------------------------------------------------------
|
||||
* This program is free software: you can redistribute it and/or modify it
|
||||
* under the terms of the GNU Lesser General Public License as published by the
|
||||
* Free Software Foundation, either version 3 of the License, or (at your
|
||||
* option) any later version.
|
||||
* -----------------------------------------------------------------------------
|
||||
* Common functionality for low/high-frequency GALLAGHER tag encoding & decoding.
|
||||
*/
|
||||
#ifndef MIFARE_GALLAGHERCORE_H__
|
||||
#define MIFARE_GALLAGHERCORE_H__
|
||||
|
||||
#include "common.h"
|
||||
|
||||
void encodeCardholderCredentials(uint8_t *eight_bytes, uint8_t region_code, uint16_t facility_code, uint32_t card_number, uint8_t issue_level);
|
||||
|
||||
void decodeCardholderCredentials(uint8_t *eight_bytes, uint8_t *region_code, uint16_t *facility_code, uint32_t *card_number, uint8_t *issue_level);
|
||||
|
||||
bool isValidGallagherCredentials(uint64_t region_code, uint64_t facility_code, uint64_t card_number, uint64_t issue_level);
|
||||
|
||||
#endif
|
||||
Loading…
Add table
Add a link
Reference in a new issue