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Merge pull request #78 from merlokk/emv_pse_directories

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Emv pse directories (SFI)
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Iceman 2019-01-05 18:30:57 +01:00 • committed by GitHub
commit 2812017a14
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3 changed files with 159 additions and 34 deletions
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153
client/emv/emvcore.c
View file

@ -332,60 +332,145 @@ int EMVSelectPSE(EMVCommandChannel channel, bool ActivateField, bool LeaveFieldO
return res; return res;
} }
int EMVSelectWithRetry(EMVCommandChannel channel, bool ActivateField, bool LeaveFieldON, uint8_t *AID, size_t AIDLen, uint8_t *Result, size_t MaxResultLen, size_t *ResultLen, uint16_t *sw, struct tlvdb *tlv) {
int retrycnt = 0;
int res = 0;
do {
res = EMVSelect(channel, false, true, AID, AIDLen, Result, MaxResultLen, ResultLen, sw, tlv);
// retry if error and not returned sw error
if (res && res != 5) {
if (++retrycnt < 3){
continue;
} else {
// card select error, proxmark error
if (res == 1) {
PrintAndLogEx(WARNING, "Exit...");
return 1;
}
retrycnt = 0;
PrintAndLogEx(NORMAL, "Retry failed [%s]. Skiped...", sprint_hex_inrow(AID, AIDLen));
return res;
}
}
} while (res && res != 5);
return res;
}
int EMVCheckAID(EMVCommandChannel channel, bool decodeTLV, struct tlvdb *tlvdbelm, struct tlvdb *tlv){
uint8_t data[APDU_RES_LEN] = {0};
size_t datalen = 0;
int res = 0;
uint16_t sw = 0;
while (tlvdbelm) {
const struct tlv *tgAID = tlvdb_get_inchild(tlvdbelm, 0x4f, NULL);
if (tgAID) {
res = EMVSelectWithRetry(channel, false, true, (uint8_t *)tgAID->value, tgAID->len, data, sizeof(data), &datalen, &sw, tlv);
// if returned sw error
if (res == 5) {
// next element
tlvdbelm = tlvdb_find_next(tlvdbelm, 0x61);
continue;
}
if (res)
break;
// all is ok
if (decodeTLV){
PrintAndLogEx(NORMAL, "%s:", sprint_hex_inrow(tgAID->value, tgAID->len));
TLVPrintFromBuffer(data, datalen);
}
}
tlvdbelm = tlvdb_find_next(tlvdbelm, 0x61);
}
return res;
}
int EMVSearchPSE(EMVCommandChannel channel, bool ActivateField, bool LeaveFieldON, uint8_t PSENum, bool decodeTLV, struct tlvdb *tlv) { int EMVSearchPSE(EMVCommandChannel channel, bool ActivateField, bool LeaveFieldON, uint8_t PSENum, bool decodeTLV, struct tlvdb *tlv) {
uint8_t data[APDU_RES_LEN] = {0}; uint8_t data[APDU_RES_LEN] = {0};
size_t datalen = 0; size_t datalen = 0;
uint8_t sfidata[0x11][APDU_RES_LEN] = {0};
size_t sfidatalen[0x11] = {0};
uint16_t sw = 0; uint16_t sw = 0;
int res; int res;
bool fileFound = false;
// select PPSE // select PPSE
res = EMVSelectPSE(channel, ActivateField, true, PSENum, data, sizeof(data), &datalen, &sw); res = EMVSelectPSE(channel, ActivateField, true, PSENum, data, sizeof(data), &datalen, &sw);
if (!res){ if (!res){
if (sw != 0x9000) {
PrintAndLogEx(FAILED, "Select PSE error. APDU error: %04x.", sw);
return 1;
}
struct tlvdb *t = NULL; struct tlvdb *t = NULL;
t = tlvdb_parse_multi(data, datalen); t = tlvdb_parse_multi(data, datalen);
if (t) { if (t) {
int retrycnt = 0; // PSE/PPSE with SFI
struct tlvdb *ttmp = tlvdb_find_path(t, (tlv_tag_t[]){0x6f, 0xa5, 0xbf0c, 0x61, 0x00}); struct tlvdb *tsfi = tlvdb_find_path(t, (tlv_tag_t[]){0x6f, 0xa5, 0x88, 0x00});
if (!ttmp) if (tsfi) {
PrintAndLogEx(FAILED, "PPSE don't have records."); uint8_t sfin = 0;
tlv_get_uint8(tlvdb_get_tlv(tsfi), &sfin);
while (ttmp) { PrintAndLogEx(INFO, "* PPSE get SFI: 0x%02x.", sfin);
const struct tlv *tgAID = tlvdb_get_inchild(ttmp, 0x4f, NULL);
if (tgAID) { for (uint8_t ui = 0x01; ui <= 0x10; ui++) {
res = EMVSelect(channel, false, true, (uint8_t *)tgAID->value, tgAID->len, data, sizeof(data), &datalen, &sw, tlv); PrintAndLogEx(INFO, "* * Get SFI: 0x%02x. num: 0x%02x", sfin, ui);
res = EMVReadRecord(channel, true, sfin, ui, sfidata[ui], APDU_RES_LEN, &sfidatalen[ui], &sw, NULL);
// retry if error and not returned sw error
if (res && res != 5) { // end of records
if (++retrycnt < 3){ if (sw == 0x6a83) {
continue; sfidatalen[ui] = 0;
} else { PrintAndLogEx(INFO, "* * PPSE get SFI. End of records.");
// card select error, proxmark error break;
if (res == 1) { }
PrintAndLogEx(WARNING, "Exit...");
return 1; // error catch!
} if (sw != 0x9000) {
sfidatalen[ui] = 0;
retrycnt = 0; PrintAndLogEx(FAILED, "PPSE get Error. APDU error: %04x.", sw);
PrintAndLogEx(NORMAL, "Retry failed [%s]. Skiped...", sprint_hex_inrow(tgAID->value, tgAID->len)); break;
}
// next element
ttmp = tlvdb_find_next(ttmp, 0x61);
continue;
} }
retrycnt = 0;
// all is ok
if (decodeTLV){ if (decodeTLV){
PrintAndLogEx(NORMAL, "%s:", sprint_hex_inrow(tgAID->value, tgAID->len)); TLVPrintFromBuffer(sfidata[ui], sfidatalen[ui]);
TLVPrintFromBuffer(data, datalen); }
}
for (uint8_t ui = 0x01; ui <= 0x10; ui++) {
if (sfidatalen[ui]) {
struct tlvdb *tsfi = NULL;
tsfi = tlvdb_parse_multi(sfidata[ui], sfidatalen[ui]);
if (tsfi) {
struct tlvdb *tsfitmp = tlvdb_find_path(tsfi, (tlv_tag_t[]){0x70, 0x61, 0x00});
if (!tsfitmp) {
PrintAndLogEx(FAILED, "SFI 0x%02d don't have records.", sfidatalen[ui]);
continue;
}
res = EMVCheckAID(channel, decodeTLV, tsfitmp, tlv);
fileFound = true;
}
tlvdb_free(tsfi);
} }
} }
ttmp = tlvdb_find_next(ttmp, 0x61);
} }
// PSE/PPSE plain (wo SFI)
struct tlvdb *ttmp = tlvdb_find_path(t, (tlv_tag_t[]){0x6f, 0xa5, 0xbf0c, 0x61, 0x00});
if (ttmp) {
res = EMVCheckAID(channel, decodeTLV, ttmp, tlv);
fileFound = true;
}
if (!fileFound)
PrintAndLogEx(FAILED, "PPSE don't have records.");
tlvdb_free(t); tlvdb_free(t);
} else { } else {
PrintAndLogEx(WARNING, "PPSE ERROR: Can't get TLV from response."); PrintAndLogEx(WARNING, "PPSE ERROR: Can't get TLV from response.");

37
client/emv/tlv.c
View file

@ -534,3 +534,40 @@ struct tlvdb *tlvdb_elm_get_parent(struct tlvdb *tlvdb)
{ {
return tlvdb->parent; return tlvdb->parent;
} }
bool tlv_get_uint8(const struct tlv *etlv, uint8_t *value)
{
*value = 0;
if (etlv)
{
if (etlv->len == 0)
return true;
if (etlv->len == 1)
{
*value = etlv->value[0];
return true;
}
}
return false;
}
bool tlv_get_int(const struct tlv *etlv, int *value)
{
*value = 0;
if (etlv)
{
if (etlv->len == 0)
return true;
if (etlv->len <= 4)
{
for (int i = 0; i < etlv->len; i++)
{
*value += etlv->value[i] * (1 << (i * 8));
}
return true;
}
}
return false;
}

3
client/emv/tlv.h
View file

@ -61,4 +61,7 @@ unsigned char *tlv_encode(const struct tlv *tlv, size_t *len);
bool tlv_is_constructed(const struct tlv *tlv); bool tlv_is_constructed(const struct tlv *tlv);
bool tlv_equal(const struct tlv *a, const struct tlv *b); bool tlv_equal(const struct tlv *a, const struct tlv *b);
bool tlv_get_uint8(const struct tlv *etlv, uint8_t *value);
bool tlv_get_int(const struct tlv *etlv, int *value);
#endif #endif