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hf 14a info: add ATR fingerprinting

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This commit is contained in:
Philippe Teuwen
2025-09-20 12:32:03 +02:00
parent 7a81838f7d
commit f93c9977ad
6 changed files with 79 additions and 59 deletions
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CHANGELOG.md
+1
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@@ -3,6 +3,7 @@ All notable changes to this project will be documented in this file.
This project uses the changelog in accordance with [keepchangelog](http://keepachangelog.com/). Please use this to write notable changes, which is not the same as git commit log...
## [unreleased][unreleased]
- Added ATR fingerprinting to `hf 14a info` (@doegox)
## [Phrack.4.20728][2025-09-11]
- Change `lf t55xx restore` - now skips writing block0 if its all zeros (@iceman1001)
client/atr_scrap_pcsctools.py
+3
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@@ -48,6 +48,7 @@ C_HEADER="""//------------------------------------------------------------------
#define ATRS_H__
#include <stddef.h>
#include <stdint.h>
typedef struct atr_s {
const char *bytes;
@@ -55,6 +56,8 @@ typedef struct atr_s {
} atr_t;
const char *getAtrInfo(const char *atr_str);
void atsToEmulatedAtr(uint8_t *ats, uint8_t *atr, int *atrLen);
void atqbToEmulatedAtr(uint8_t *atqb, uint8_t cid, uint8_t *atr, int *atrLen);
// atr_t array is expected to be NULL terminated
const static atr_t AtrTable[] = {
client/src/atrs.c
+59
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@@ -67,3 +67,62 @@ const char *getAtrInfo(const char *atr_str) {
return AtrTable[ARRAYLEN(AtrTable) - 1].desc;
}
}
void atsToEmulatedAtr(uint8_t *ats, uint8_t *atr, int *atrLen) {
uint8_t historicalLen = 0;
uint8_t offset = 2;
if (ats[0] < 2) {
historicalLen = 0;
} else {
if ((ats[1] & 64) != 0) {
offset++;
}
if ((ats[1] & 32) != 0) {
offset++;
}
if ((ats[1] & 16) != 0) {
offset++;
}
if (offset >= ats[0]) {
historicalLen = 0;
} else {
historicalLen = ats[0] - offset;
}
}
atr[0] = 0x3B;
atr[1] = 0x80 | historicalLen;
atr[2] = 0x80;
atr[3] = 0x01;
uint8_t tck = atr[1] ^ atr[2] ^ atr[3];
for (uint8_t i = 0; i < historicalLen; ++i) {
atr[4 + i] = ats[offset + i];
tck = tck ^ ats[offset + i];
}
atr[4 + historicalLen] = tck;
*atrLen = 5 + historicalLen;
}
void atqbToEmulatedAtr(uint8_t *atqb, uint8_t cid, uint8_t *atr, int *atrLen) {
atr[0] = 0x3B;
atr[1] = 0x80 | 8;
atr[2] = 0x80;
atr[3] = 0x01;
memcpy(atr + 4, atqb, 7);
atr[11] = cid >> 4;
uint8_t tck = 0;
for (int i = 1; i < 12; ++i) {
tck = tck ^ atr[i];
}
atr[12] = tck;
*atrLen = 13;
}
client/src/atrs.h
+3
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@@ -23,6 +23,7 @@
#define ATRS_H__
#include <stddef.h>
#include <stdint.h>
typedef struct atr_s {
const char *bytes;
@@ -30,6 +31,8 @@ typedef struct atr_s {
} atr_t;
const char *getAtrInfo(const char *atr_str);
void atsToEmulatedAtr(uint8_t *ats, uint8_t *atr, int *atrLen);
void atqbToEmulatedAtr(uint8_t *atqb, uint8_t cid, uint8_t *atr, int *atrLen);
// atr_t array is expected to be NULL terminated
const static atr_t AtrTable[] = {
client/src/cmdhf14a.c
+13 -1
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@@ -2946,7 +2946,7 @@ int infoHF14A(bool verbose, bool do_nack_test, bool do_aid_search) {
if ((card.ats[0] > pos) && (card.ats_len >= card.ats[0] + 2)) {
uint8_t calen = card.ats[0] - pos;
PrintAndLogEx(NORMAL, "");
PrintAndLogEx(INFO, "-------------------- " _CYAN_("Historical bytes") " ----------------------------");
PrintAndLogEx(INFO, "-------------------- " _CYAN_("Historical bytes") " ---------------------------");
if (card.ats[pos] == 0xC1) {
PrintAndLogEx(INFO, " %s", sprint_hex(card.ats + pos, calen));
@@ -3024,6 +3024,18 @@ int infoHF14A(bool verbose, bool do_nack_test, bool do_aid_search) {
, sprint_ascii(card.ats + pos, calen)
);
}
PrintAndLogEx(NORMAL, "");
PrintAndLogEx(INFO, "------------------ " _CYAN_("ATR fingerprinting") " ---------------------------");
uint8_t atr[256] = {0};
int atrLen = 0;
atsToEmulatedAtr(card.ats, atr, &atrLen);
char *copy = str_dup(getAtrInfo(sprint_hex_inrow(atr, atrLen)));
char *token = strtok(copy, "\n");
while (token != NULL) {
PrintAndLogEx(INFO, " %s", token);
token = strtok(NULL, "\n");
}
free(copy);
}
}
}
client/src/cmdsmartcard.c
-58
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@@ -1212,64 +1212,6 @@ static int CmdSmartBruteforceSFI(const char *Cmd) {
return PM3_SUCCESS;
}
static void atsToEmulatedAtr(uint8_t *ats, uint8_t *atr, int *atrLen) {
uint8_t historicalLen = 0;
uint8_t offset = 2;
if (ats[0] < 2) {
historicalLen = 0;
} else {
if ((ats[1] & 64) != 0) {
offset++;
}
if ((ats[1] & 32) != 0) {
offset++;
}
if ((ats[1] & 16) != 0) {
offset++;
}
if (offset >= ats[0]) {
historicalLen = 0;
} else {
historicalLen = ats[0] - offset;
}
}
atr[0] = 0x3B;
atr[1] = 0x80 | historicalLen;
atr[2] = 0x80;
atr[3] = 0x01;
uint8_t tck = atr[1] ^ atr[2] ^ atr[3];
for (uint8_t i = 0; i < historicalLen; ++i) {
atr[4 + i] = ats[offset + i];
tck = tck ^ ats[offset + i];
}
atr[4 + historicalLen] = tck;
*atrLen = 5 + historicalLen;
}
static void atqbToEmulatedAtr(uint8_t *atqb, uint8_t cid, uint8_t *atr, int *atrLen) {
atr[0] = 0x3B;
atr[1] = 0x80 | 8;
atr[2] = 0x80;
atr[3] = 0x01;
memcpy(atr + 4, atqb, 7);
atr[11] = cid >> 4;
uint8_t tck = 0;
for (int i = 1; i < 12; ++i) {
tck = tck ^ atr[i];
}
atr[12] = tck;
*atrLen = 13;
}
static int CmdPCSC(const char *Cmd) {
CLIParserContext *ctx;
CLIParserInit(&ctx, "smart pcsc",