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emrtd: Add BAC check

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Ave 2020-12-06 04:48:38 +03:00
parent 885f4b52fd
commit 84a1059d93
1 changed files with 30 additions and 11 deletions
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37
client/src/cmdhfemrtd.c
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@ -48,9 +48,7 @@ static uint16_t get_sw(uint8_t *d, uint8_t n) {
return d[n] * 0x0100 + d[n + 1]; return d[n] * 0x0100 + d[n + 1];
} }
static int select_file(const char *select_by, const char *file_id) { static int select_file(const char *select_by, const char *file_id, bool activate_field, bool keep_field_on) {
bool activate_field = true;
bool keep_field_on = true;
uint8_t response[PM3_CMD_DATA_SIZE]; uint8_t response[PM3_CMD_DATA_SIZE];
int resplen = 0; int resplen = 0;
@ -70,7 +68,6 @@ static int select_file(const char *select_by, const char *file_id) {
} }
if (resplen < 2) { if (resplen < 2) {
DropField();
return false; return false;
} }
PrintAndLogEx(INFO, "Response: %s", sprint_hex(response, resplen)); PrintAndLogEx(INFO, "Response: %s", sprint_hex(response, resplen));
@ -78,7 +75,6 @@ static int select_file(const char *select_by, const char *file_id) {
uint16_t sw = get_sw(response, resplen); uint16_t sw = get_sw(response, resplen);
if (sw != 0x9000) { if (sw != 0x9000) {
PrintAndLogEx(ERR, "Selecting file failed (%04x - %s).", sw, GetAPDUCodeDescription(sw >> 8, sw & 0xff)); PrintAndLogEx(ERR, "Selecting file failed (%04x - %s).", sw, GetAPDUCodeDescription(sw >> 8, sw & 0xff));
DropField();
return false; return false;
} }
return true; return true;
@ -159,7 +155,6 @@ static int _read_binary(int offset, int bytes_to_read, uint8_t *dataout, int max
uint16_t sw = get_sw(response, resplen); uint16_t sw = get_sw(response, resplen);
if (sw != 0x9000) { if (sw != 0x9000) {
PrintAndLogEx(ERR, "Reading binary failed (%04x - %s).", sw, GetAPDUCodeDescription(sw >> 8, sw & 0xff)); PrintAndLogEx(ERR, "Reading binary failed (%04x - %s).", sw, GetAPDUCodeDescription(sw >> 8, sw & 0xff));
DropField();
return false; return false;
} }
return true; return true;
@ -202,18 +197,42 @@ static int read_file(uint8_t *dataout, int maxdataoutlen, int *dataoutlen) {
} }
int infoHF_EMRTD(void) { int infoHF_EMRTD(void) {
// const uint8_t *data
if (select_file(P1_SELECT_BY_EF, EF_CARDACCESS)) {
uint8_t response[PM3_CMD_DATA_SIZE]; uint8_t response[PM3_CMD_DATA_SIZE];
int resplen = 0; int resplen = 0;
// bool BAC = true;
// Select and read EF_CardAccess
if (select_file(P1_SELECT_BY_EF, EF_CARDACCESS, true, true)) {
read_file(response, sizeof(response), &resplen); read_file(response, sizeof(response), &resplen);
PrintAndLogEx(INFO, "EF_CardAccess: %s", sprint_hex(response, resplen)); PrintAndLogEx(INFO, "EF_CardAccess: %s", sprint_hex(response, resplen));
} else { } else {
PrintAndLogEx(INFO, "PACE unsupported. Will not read EF_CardAccess."); PrintAndLogEx(INFO, "PACE unsupported. Will not read EF_CardAccess.");
} }
// Select MRTD applet
if (select_file(P1_SELECT_BY_NAME, AID_MRTD, false, true) == false) {
PrintAndLogEx(ERR, "Couldn't select the MRTD application.");
return PM3_ESOFT;
}
// Select EF_COM
if (select_file(P1_SELECT_BY_EF, EF_COM, false, true) == false) {
// BAC = true;
PrintAndLogEx(INFO, "Basic Access Control is enforced. Will attempt auth.");
} else {
// BAC = false;
// Select EF_DG1
select_file(P1_SELECT_BY_EF, EF_DG1, false, true);
if (read_file(response, sizeof(response), &resplen) == false) {
// BAC = true;
PrintAndLogEx(INFO, "Basic Access Control is enforced. Will attempt auth.");
} else {
// BAC = false;
PrintAndLogEx(INFO, "EF_DG1: %s", sprint_hex(response, resplen));
}
}
DropField(); DropField();
return PM3_SUCCESS; return PM3_SUCCESS;
} }