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hf 14a config: better options

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This commit is contained in:
Philippe Teuwen 2020-09-07 10:24:04 +02:00
commit 2fc36d73c9
3 changed files with 106 additions and 52 deletions
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57
armsrc/iso14443a.c
View file

@ -124,8 +124,8 @@ static uint32_t LastProxToAirDuration;
/* /*
Default HF 14a config is set to: Default HF 14a config is set to:
forceanticol = false forceanticol = 0 (auto)
obeybadbcc = false forcebcc = 0 (expect valid BCC)
forcecl2 = 0 (auto) forcecl2 = 0 (auto)
forcecl3 = 0 (auto) forcecl3 = 0 (auto)
*/ */
@ -133,10 +133,10 @@ static hf14a_config hf14aconfig = { 0, 0, 0, 0 } ;
void printHf14aConfig(void) { void printHf14aConfig(void) {
DbpString(_CYAN_("HF 14a config")); DbpString(_CYAN_("HF 14a config"));
Dbprintf("[a] Force std anticol.....%s", (hf14aconfig.forceanticol) ? _RED_("Yes") " (even if bad ATQA)" : _GREEN_("No")); Dbprintf("[a] Anticol override......%s%s%s", (hf14aconfig.forceanticol==0) ? _GREEN_("No") " (follow standard)" : "", (hf14aconfig.forceanticol==1) ? _RED_("Yes: Always do anticol") : "", (hf14aconfig.forceanticol==2) ? _RED_("Yes: Always skip anticol") : "");
Dbprintf("[b] Force obey bad BCC....%s", (hf14aconfig.obeybadbcc) ? _RED_("Yes") : _GREEN_("No")); Dbprintf("[b] BCC override..........%s%s%s", (hf14aconfig.forcebcc==0) ? _GREEN_("No") " (follow standard)" : "", (hf14aconfig.forcebcc==1) ? _RED_("Yes: Always do CL2") : "", (hf14aconfig.forcebcc==2) ? _RED_("Yes: Always use card BCC") : "");
Dbprintf("[2] Force CL2 override ...%s%s%s", (hf14aconfig.forcecl2==0) ? _GREEN_("No") : "", (hf14aconfig.forcecl2==1) ? _RED_("Yes: Always do CL2") : "", (hf14aconfig.forcecl2==-1) ? _RED_("Yes: Always skip CL2") : ""); Dbprintf("[2] CL2 override..........%s%s%s", (hf14aconfig.forcecl2==0) ? _GREEN_("No") " (follow standard)" : "", (hf14aconfig.forcecl2==1) ? _RED_("Yes: Always do CL2") : "", (hf14aconfig.forcecl2==2) ? _RED_("Yes: Always skip CL2") : "");
Dbprintf("[3] Force CL3 override ...%s%s%s", (hf14aconfig.forcecl3==0) ? _GREEN_("No") : "", (hf14aconfig.forcecl3==1) ? _RED_("Yes: Always do CL3") : "", (hf14aconfig.forcecl3==-1) ? _RED_("Yes: Always skip CL3") : ""); Dbprintf("[3] CL3 override..........%s%s%s", (hf14aconfig.forcecl3==0) ? _GREEN_("No") " (follow standard)" : "", (hf14aconfig.forcecl3==1) ? _RED_("Yes: Always do CL3") : "", (hf14aconfig.forcecl3==2) ? _RED_("Yes: Always skip CL3") : "");
} }
/** /**
@ -149,13 +149,13 @@ void printHf14aConfig(void) {
*/ */
void setHf14aConfig(hf14a_config *hc) { void setHf14aConfig(hf14a_config *hc) {
if (hc->forceanticol > -1) if ((hc->forceanticol >= 0) && (hc->forceanticol <= 2))
hf14aconfig.forceanticol = (hc->forceanticol > 0) ? 1 : 0; hf14aconfig.forceanticol = hc->forceanticol;
if (hc->obeybadbcc > -1) if ((hc->forcebcc >= 0) && (hc->forcebcc <= 2))
hf14aconfig.obeybadbcc = (hc->obeybadbcc > 0) ? 1 : 0; hf14aconfig.forcebcc = hc->forcebcc;
if ((hc->forcecl2 >= -1) && (hc->forcecl2 <= 1)) if ((hc->forcecl2 >= 0) && (hc->forcecl2 <= 2))
hf14aconfig.forcecl2 = hc->forcecl2; hf14aconfig.forcecl2 = hc->forcecl2;
if ((hc->forcecl3 >= -1) && (hc->forcecl3 <= 1)) if ((hc->forcecl3 >= 0) && (hc->forcecl3 <= 2))
hf14aconfig.forcecl3 = hc->forcecl3; hf14aconfig.forcecl3 = hc->forcecl3;
} }
@ -2401,10 +2401,12 @@ int iso14443a_select_card(uint8_t *uid_ptr, iso14a_card_select_t *p_card, uint32
memset(uid_ptr, 0, 10); memset(uid_ptr, 0, 10);
} }
if ( ! hf14aconfig.forceanticol ) { if ( hf14aconfig.forceanticol == 0 ) {
// check for proprietary anticollision: // check for proprietary anticollision:
if ((resp[0] & 0x1F) == 0) return 3; if ((resp[0] & 0x1F) == 0) return 3;
} } else if ( hf14aconfig.forceanticol == 2 ) {
return 3; // force skipping anticol
} // else force executing
// OK we will select at least at cascade 1, lets see if first byte of UID was 0x88 in // OK we will select at least at cascade 1, lets see if first byte of UID was 0x88 in
// which case we need to make a cascade 2 request and select - this is a long UID // which case we need to make a cascade 2 request and select - this is a long UID
@ -2419,8 +2421,10 @@ int iso14443a_select_card(uint8_t *uid_ptr, iso14a_card_select_t *p_card, uint32
if (anticollision) { if (anticollision) {
// SELECT_ALL // SELECT_ALL
ReaderTransmit(sel_all, sizeof(sel_all), NULL); ReaderTransmit(sel_all, sizeof(sel_all), NULL);
if (!ReaderReceive(resp, resp_par)) return 0; if (!ReaderReceive(resp, resp_par)) {
Dbprintf("Card didn't answer to CL%i select all", cascade_level + 1);
return 0;
}
if (Demod.collisionPos) { // we had a collision and need to construct the UID bit by bit if (Demod.collisionPos) { // we had a collision and need to construct the UID bit by bit
memset(uid_resp, 0, 5); memset(uid_resp, 0, 5);
uint16_t uid_resp_bits = 0; uint16_t uid_resp_bits = 0;
@ -2474,11 +2478,14 @@ int iso14443a_select_card(uint8_t *uid_ptr, iso14a_card_select_t *p_card, uint32
memcpy(sel_uid + 2, uid_resp, 5); // the UID received during anticollision with original BCC memcpy(sel_uid + 2, uid_resp, 5); // the UID received during anticollision with original BCC
uint8_t bcc = sel_uid[2] ^ sel_uid[3] ^ sel_uid[4] ^ sel_uid[5]; // calculate BCC uint8_t bcc = sel_uid[2] ^ sel_uid[3] ^ sel_uid[4] ^ sel_uid[5]; // calculate BCC
if (sel_uid[6] != bcc) { if (sel_uid[6] != bcc) {
Dbprintf("BCC%d incorrect, got 0x%02x, expected 0x%02x. Will use " NOLF, cascade_level, sel_uid[6], bcc); Dbprintf("BCC%d incorrect, got 0x%02x, expected 0x%02x", cascade_level, sel_uid[6], bcc);
if (! hf14aconfig.obeybadbcc) { if (hf14aconfig.forcebcc==0) {
Dbprintf("Aborting");
return 0;
} else if (hf14aconfig.forcebcc==1) {
sel_uid[6] = bcc; sel_uid[6] = bcc;
} } // else use card BCC
Dbprintf("0x%02x", sel_uid[6]); Dbprintf("Using BCC=" _YELLOW_("0x%02x") " to perform anticollision", sel_uid[6]);
} }
} else { } else {
memcpy(sel_uid + 2, uid_resp, 4); // the provided UID memcpy(sel_uid + 2, uid_resp, 4); // the provided UID
@ -2489,20 +2496,22 @@ int iso14443a_select_card(uint8_t *uid_ptr, iso14a_card_select_t *p_card, uint32
ReaderTransmit(sel_uid, sizeof(sel_uid), NULL); ReaderTransmit(sel_uid, sizeof(sel_uid), NULL);
// Receive the SAK // Receive the SAK
if (!ReaderReceive(resp, resp_par)) return 0; if (!ReaderReceive(resp, resp_par)) {
Dbprintf("Card didn't answer to select");
return 0;
}
sak = resp[0]; sak = resp[0];
// Test if more parts of the uid are coming // Test if more parts of the uid are coming
do_cascade = (((sak & 0x04) /* && uid_resp[0] == 0x88 */) > 0); do_cascade = (((sak & 0x04) /* && uid_resp[0] == 0x88 */) > 0);
if (cascade_level==0) { if (cascade_level==0) {
if (hf14aconfig.forcecl2==-1) { if (hf14aconfig.forcecl2==2) {
do_cascade = false; do_cascade = false;
} else if (hf14aconfig.forcecl2==1) { } else if (hf14aconfig.forcecl2==1) {
do_cascade = true; do_cascade = true;
} // else 0==auto } // else 0==auto
} else if (cascade_level==1) { } else if (cascade_level==1) {
if (hf14aconfig.forcecl3==-1) { if (hf14aconfig.forcecl3==2) {
do_cascade = false; do_cascade = false;
} else if (hf14aconfig.forcecl3==1) { } else if (hf14aconfig.forcecl3==1) {
do_cascade = true; do_cascade = true;

93
client/src/cmdhf14a.c
View file

@ -169,19 +169,19 @@ static uint16_t frameLength = 0;
uint16_t atsFSC[] = {16, 24, 32, 40, 48, 64, 96, 128, 256}; uint16_t atsFSC[] = {16, 24, 32, 40, 48, 64, 96, 128, 256};
static int usage_hf_14a_config(void) { static int usage_hf_14a_config(void) {
PrintAndLogEx(NORMAL, "Usage: hf 14a config [a 0|1] [b 0|1]"); PrintAndLogEx(NORMAL, "Usage: hf 14a config [a 0|1|2] [b 0|1|2] [2 0|1|2] [3 0|1|2]");
PrintAndLogEx(NORMAL, "Options:"); PrintAndLogEx(NORMAL, "Options:");
PrintAndLogEx(NORMAL, " h This help"); PrintAndLogEx(NORMAL, " h This help");
PrintAndLogEx(NORMAL, " a 0|1 Force standard anticollision sequence even if ATQA tells not to do it"); PrintAndLogEx(NORMAL, " a 0|1|2 ATQA<>anticollision: 0=follow standard 1=execute anticol 2=skip anticol");
PrintAndLogEx(NORMAL, " b 0|1 Obey bad BCC in anticollision sequence"); PrintAndLogEx(NORMAL, " b 0|1|2 BCC: 0=follow standard 1=use fixed BCC 2=use card BCC");
PrintAndLogEx(NORMAL, " 2 0|1|-1 Override CL2 decision: 0=auto, 1=always perform CL2, -1=never perform CL2"); PrintAndLogEx(NORMAL, " 2 0|1|2 SAK<>CL2: 0=follow standard 1=execute CL2 2=skip CL2");
PrintAndLogEx(NORMAL, " 3 0|1|-1 Override CL3 decision: 0=auto, 1=always perform CL3, -1=never perform CL3"); PrintAndLogEx(NORMAL, " 3 0|1|2 SAK<>CL3: 0=follow standard 1=execute CL3 2=skip CL3");
PrintAndLogEx(NORMAL, "Examples:"); PrintAndLogEx(NORMAL, "Examples:");
PrintAndLogEx(NORMAL, _YELLOW_(" hf 14a config ")" Print current configuration"); PrintAndLogEx(NORMAL, _YELLOW_(" hf 14a config ")" Print current configuration");
PrintAndLogEx(NORMAL, _YELLOW_(" hf 14a config a ")" Force standard anticollision"); PrintAndLogEx(NORMAL, _YELLOW_(" hf 14a config a 1 ")" Force execution of anticollision");
PrintAndLogEx(NORMAL, _YELLOW_(" hf 14a config a 0 ")" Restore ATQA interpretation"); PrintAndLogEx(NORMAL, _YELLOW_(" hf 14a config a 0 ")" Restore ATQA interpretation");
PrintAndLogEx(NORMAL, _YELLOW_(" hf 14a config b ")" Force obey bad BCC in anticollision"); PrintAndLogEx(NORMAL, _YELLOW_(" hf 14a config b 1 ")" Force fix of bad BCC in anticollision");
PrintAndLogEx(NORMAL, _YELLOW_(" hf 14a config b 0 ")" Restore BCC computation in anticollision"); PrintAndLogEx(NORMAL, _YELLOW_(" hf 14a config b 0 ")" Restore BCC check");
return PM3_SUCCESS; return PM3_SUCCESS;
} }
@ -292,41 +292,86 @@ static int CmdHf14AConfig(const char *Cmd) {
hf14a_config config = { hf14a_config config = {
.forceanticol = -1, .forceanticol = -1,
.obeybadbcc = -1, .forcebcc = -1,
.forcecl2 = -2, .forcecl2 = -1,
.forcecl3 = -2 .forcecl3 = -1
}; };
bool errors = false; bool errors = false;
char cl[3] = {0};
uint8_t cmdp = 0; uint8_t cmdp = 0;
while (param_getchar(Cmd, cmdp) != 0x00 && !errors) { while (param_getchar(Cmd, cmdp) != 0x00 && !errors) {
switch (param_getchar(Cmd, cmdp)) { switch (param_getchar(Cmd, cmdp)) {
case 'h': case 'h':
return usage_hf_14a_config(); return usage_hf_14a_config();
case 'a': case 'a':
config.forceanticol = (param_getchar(Cmd, cmdp + 1) == '1'); switch (param_getchar(Cmd, cmdp + 1)) {
case '0':
config.forceanticol = 0;
break;
case '1':
config.forceanticol = 1;
break;
case '2':
config.forceanticol = 2;
break;
default:
PrintAndLogEx(WARNING, "Unknown value '%c'", param_getchar(Cmd, cmdp + 1));
errors = 1;
break;
}
cmdp += 2; cmdp += 2;
break; break;
case 'b': case 'b':
config.obeybadbcc = (param_getchar(Cmd, cmdp + 1) == '1'); switch (param_getchar(Cmd, cmdp + 1)) {
case '0':
config.forcebcc = 0;
break;
case '1':
config.forcebcc = 1;
break;
case '2':
config.forcebcc = 2;
break;
default:
PrintAndLogEx(WARNING, "Unknown value '%c'", param_getchar(Cmd, cmdp + 1));
errors = 1;
break;
}
cmdp += 2; cmdp += 2;
break; break;
case '2': case '2':
param_getstr(Cmd, cmdp + 1, cl, sizeof(cl)); switch (param_getchar(Cmd, cmdp + 1)) {
if (strcmp(cl, "-1") == 0) { case '0':
config.forcecl2 = -1; config.forcecl2 = 0;
} else { break;
config.forcecl2 = strcmp(cl, "1") == 0; case '1':
config.forcecl2 = 1;
break;
case '2':
config.forcecl2 = 2;
break;
default:
PrintAndLogEx(WARNING, "Unknown value '%c'", param_getchar(Cmd, cmdp + 1));
errors = 1;
break;
} }
cmdp += 2; cmdp += 2;
break; break;
case '3': case '3':
param_getstr(Cmd, cmdp + 1, cl, sizeof(cl)); switch (param_getchar(Cmd, cmdp + 1)) {
if (strcmp(cl, "-1") == 0) { case '0':
config.forcecl3 = -1; config.forcecl3 = 0;
} else { break;
config.forcecl3 = strcmp(cl, "1") == 0; case '1':
config.forcecl3 = 1;
break;
case '2':
config.forcecl3 = 2;
break;
default:
PrintAndLogEx(WARNING, "Unknown value '%c'", param_getchar(Cmd, cmdp + 1));
errors = 1;
break;
} }
cmdp += 2; cmdp += 2;
break; break;

8
include/pm3_cmd.h
View file

@ -124,10 +124,10 @@ typedef struct {
// A struct used to send hf14a-configs over USB // A struct used to send hf14a-configs over USB
typedef struct { typedef struct {
int8_t forceanticol; // bool but also -1 if to be ignored int8_t forceanticol; // 0:auto 1:force executing anticol 2:force skipping anticol
int8_t obeybadbcc; // bool but also -1 if to be ignored int8_t forcebcc; // 0:expect valid BCC 1:force using computed BCC 2:force using card BCC
int8_t forcecl2; // 0:auto 1:force executing CL2 -1:force skipping CL2 int8_t forcecl2; // 0:auto 1:force executing CL2 2:force skipping CL2
int8_t forcecl3; // 0:auto 1:force executing CL3 -1:force skipping CL3 int8_t forcecl3; // 0:auto 1:force executing CL3 2:force skipping CL3
} PACKED hf14a_config; } PACKED hf14a_config;
// Tracelog Header struct // Tracelog Header struct