fix emv search behavior
authorpwpiwi <pwpiwi@users.noreply.github.com>
Thu, 1 Aug 2019 14:58:22 +0000 (10:58 -0400)
committerGitHub <noreply@github.com>
Thu, 1 Aug 2019 14:58:22 +0000 (10:58 -0400)
(taken from PRs 261 and 262 by @merlokk on https://github.com/RfidResearchGroup/proxmark3)
+ whitespace fixes

client/emv/emvcore.c

index 46fc1b1e9f16eabcebe6c140095e0c794f2b1263..53c1c6115266cf2d7557a2d4a9a7b9572d29496f 100644 (file)
@@ -287,10 +287,10 @@ struct tlvdb *GetdCVVRawFromTrack2(const struct tlv *track2) {
 }
 
 
-int EMVExchangeEx(EMVCommandChannel channel, bool ActivateField, bool LeaveFieldON, uint8_t *apdu, int apdu_len, uint8_t *Result, size_t MaxResultLen, size_t *ResultLen, uint16_t *sw, struct tlvdb *tlv) 
+int EMVExchangeEx(EMVCommandChannel channel, bool ActivateField, bool LeaveFieldON, uint8_t *apdu, int apdu_len, uint8_t *Result, size_t MaxResultLen, size_t *ResultLen, uint16_t *sw, struct tlvdb *tlv)
 {
        *ResultLen = 0;
-       if (sw) *sw = 0;
+       if (sw) *sw = 0;
        uint16_t isw = 0;
        int res = 0;
 
@@ -314,7 +314,7 @@ int EMVExchangeEx(EMVCommandChannel channel, bool ActivateField, bool LeaveField
        }
 #else
        res = ExchangeAPDU14a(apdu, apdu_len, ActivateField, LeaveFieldON, Result, (int)MaxResultLen, (int *)ResultLen);
-#endif 
+#endif
 
        if (res) {
                return res;
@@ -338,7 +338,7 @@ int EMVExchangeEx(EMVCommandChannel channel, bool ActivateField, bool LeaveField
        if (res) return res;
 
        *ResultLen -= 2;
-       
+
        isw = Result[*ResultLen] * 0x0100 + Result[*ResultLen + 1];
        if (sw)
                *sw = isw;
@@ -359,11 +359,11 @@ int EMVExchangeEx(EMVCommandChannel channel, bool ActivateField, bool LeaveField
        return 0;
 }
 
-static int EMVExchange(EMVCommandChannel channel, bool LeaveFieldON, uint8_t *apdu, int apdu_len, uint8_t *Result, size_t MaxResultLen, size_t *ResultLen, uint16_t *sw, struct tlvdb *tlv) 
+static int EMVExchange(EMVCommandChannel channel, bool LeaveFieldON, uint8_t *apdu, int apdu_len, uint8_t *Result, size_t MaxResultLen, size_t *ResultLen, uint16_t *sw, struct tlvdb *tlv)
 {
        uint8_t APDU[APDU_COMMAND_LEN];
        memcpy(APDU, apdu, apdu_len);
-       APDU[apdu_len] = 0x00; 
+       APDU[apdu_len] = 0x00;
        if (channel == ECC_CONTACTLESS) {
                if (apdu_len == 5) {
                        // there is no Lc but an Le already
@@ -376,7 +376,7 @@ static int EMVExchange(EMVCommandChannel channel, bool LeaveFieldON, uint8_t *ap
        return EMVExchangeEx(channel, false, LeaveFieldON, APDU, apdu_len, Result, MaxResultLen, ResultLen, sw, tlv);
 }
 
-int EMVSelect(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 EMVSelect(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)
 {
        uint8_t Select_APDU[APDU_COMMAND_LEN] = {0x00, ISO7816_SELECT_FILE, 0x04, 0x00, AIDLen, 0x00};
        memcpy(Select_APDU + 5, AID, AIDLen);
@@ -397,7 +397,7 @@ int EMVSelectPSE(EMVCommandChannel channel, bool ActivateField, bool LeaveFieldO
                        param_gethex_to_eol(PSElist[1], 0, buf, sizeof(buf), &len);
                        break;
                case 2:
-               
+
                        param_gethex_to_eol(PSElist[0], 0, buf, sizeof(buf), &len);
                        break;
                default:
@@ -427,11 +427,11 @@ int EMVSelectWithRetry(EMVCommandChannel channel, bool ActivateField, bool Leave
                                        PrintAndLogEx(WARNING, "Exit...");
                                        return 1;
                                }
-                               
+
                                retrycnt = 0;
                                PrintAndLogEx(NORMAL, "Retry failed [%s]. Skiped...", sprint_hex_inrow(AID, AIDLen));
                                return res;
-                       }       
+                       }
                }
        } while (res && res != 5);
 
@@ -456,7 +456,7 @@ int EMVCheckAID(EMVCommandChannel channel, bool decodeTLV, struct tlvdb *tlvdbel
                                tlvdbelm = tlvdb_find_next(tlvdbelm, 0x61);
                                continue;
                        }
-                       
+
                        if (res)
                                break;
 
@@ -482,7 +482,7 @@ int EMVSearchPSE(EMVCommandChannel channel, bool ActivateField, bool LeaveFieldO
        bool fileFound = false;
 
        char *PSE_or_PPSE = PSENum == 1 ? "PSE" : "PPSE";
-       
+
        // select PPSE
        res = EMVSelectPSE(channel, ActivateField, true, PSENum, data, sizeof(data), &datalen, &sw);
 
@@ -491,7 +491,7 @@ int EMVSearchPSE(EMVCommandChannel channel, bool ActivateField, bool LeaveFieldO
                        PrintAndLogEx(FAILED, "Select PSE error. APDU error: %04x.", sw);
                        return 1;
                }
-               
+
                struct tlvdb *t = NULL;
                t = tlvdb_parse_multi(data, datalen);
                if (t) {
@@ -501,18 +501,18 @@ int EMVSearchPSE(EMVCommandChannel channel, bool ActivateField, bool LeaveFieldO
                                uint8_t sfin = 0;
                                tlv_get_uint8(tlvdb_get_tlv(tsfi), &sfin);
                                PrintAndLogEx(INFO, "* PPSE get SFI: 0x%02x.", sfin);
-                               
+
                                for (uint8_t ui = 0x01; ui <= 0x10; ui++) {
                                        PrintAndLogEx(INFO, "* * Get SFI: 0x%02x. num: 0x%02x", sfin, ui);
                                        res = EMVReadRecord(channel, true, sfin, ui, sfidata[ui], APDU_RESPONSE_LEN, &sfidatalen[ui], &sw, NULL);
-                                       
+
                                        // end of records
                                        if (sw == 0x6a83) {
                                                sfidatalen[ui] = 0;
                                                PrintAndLogEx(INFO, "* * PPSE get SFI. End of records.");
                                                break;
                                        }
-                                       
+
                                        // error catch!
                                        if (sw != 0x9000) {
                                                sfidatalen[ui] = 0;
@@ -535,7 +535,7 @@ int EMVSearchPSE(EMVCommandChannel channel, bool ActivateField, bool LeaveFieldO
                                                                PrintAndLogEx(FAILED, "SFI 0x%02d doesn't have any records.", sfidatalen[ui]);
                                                                continue;
                                                        }
-                                                       res = EMVCheckAID(channel, decodeTLV, tsfitmp, tlv);                                                    
+                                                       res = EMVCheckAID(channel, decodeTLV, tsfitmp, tlv);
                                                        fileFound = true;
                                                }
                                                tlvdb_free(tsfi);
@@ -550,7 +550,7 @@ int EMVSearchPSE(EMVCommandChannel channel, bool ActivateField, bool LeaveFieldO
                                res = EMVCheckAID(channel, decodeTLV, ttmp, tlv);
                                fileFound = true;
                        }
-                       
+
                        if (!fileFound)
                                PrintAndLogEx(FAILED, "PPSE doesn't have any records.");
 
@@ -579,14 +579,16 @@ int EMVSearch(EMVCommandChannel channel, bool ActivateField, bool LeaveFieldON,
        int retrycnt = 0;
        for(int i = 0; i < AIDlistLen; i ++) {
                param_gethex_to_eol(AIDlist[i].aid, 0, aidbuf, sizeof(aidbuf), &aidlen);
-               res = EMVSelect(channel, (i == 0) ? ActivateField : false, (i == AIDlistLen - 1) ? LeaveFieldON : true, aidbuf, aidlen, data, sizeof(data), &datalen, &sw, tlv);
+               res = EMVSelect(channel, (i == 0) ? ActivateField : false, true, aidbuf, aidlen, data, sizeof(data), &datalen, &sw, tlv);
                // retry if error and not returned sw error
                if (res && res != 5) {
                        if (++retrycnt < 3){
                                i--;
                        } else {
-                               // (1) - card select error, proxmark error OR (200) - result length = 0
-                               if (res == 1 || res == 200) {
+                               // (1) - card select error, (4) reply timeout, (200) - result length = 0
+                               if (res == 1 || res == 4 || res == 200) {
+                                       if (!LeaveFieldON)
+                                               DropFieldEx(channel);
                                        PrintAndLogEx(WARNING, "Exit...");
                                        return 1;
                                }
@@ -610,6 +612,9 @@ int EMVSearch(EMVCommandChannel channel, bool ActivateField, bool LeaveFieldON,
                }
        }
 
+       if (!LeaveFieldON)
+               DropFieldEx(channel);
+
        return 0;
 }
 
@@ -652,12 +657,12 @@ int EMVSelectApplication(struct tlvdb *tlv, uint8_t *AID, size_t *AIDlen) {
        return 0;
 }
 
-int EMVGPO(EMVCommandChannel channel, bool LeaveFieldON, uint8_t *PDOL, size_t PDOLLen, uint8_t *Result, size_t MaxResultLen, size_t *ResultLen, uint16_t *sw, struct tlvdb *tlv) 
+int EMVGPO(EMVCommandChannel channel, bool LeaveFieldON, uint8_t *PDOL, size_t PDOLLen, uint8_t *Result, size_t MaxResultLen, size_t *ResultLen, uint16_t *sw, struct tlvdb *tlv)
 {
        uint8_t GPO_APDU[APDU_COMMAND_LEN] = {0x80, ISO7816_GET_PROCESSING_OPTIONS, 0x00, 0x00, PDOLLen, 0x00};
        memcpy(GPO_APDU + 5, PDOL, PDOLLen);
        int apdulen = 5 + PDOLLen;
-       
+
        return EMVExchange(channel, LeaveFieldON, GPO_APDU, apdulen, Result, MaxResultLen, ResultLen, sw, tlv);
 }
 
@@ -677,14 +682,14 @@ int EMVAC(EMVCommandChannel channel, bool LeaveFieldON, uint8_t RefControl, uint
        uint8_t CDOL_APDU[APDU_COMMAND_LEN] = {0x80, 0xae, RefControl, 0x00, CDOLLen, 0x00};
        memcpy(CDOL_APDU + 5, CDOL, CDOLLen);
        int apdulen = 5 + CDOLLen;
-       
+
        return EMVExchange(channel, LeaveFieldON, CDOL_APDU, apdulen, Result, MaxResultLen, ResultLen, sw, tlv);
 }
 
-int EMVGenerateChallenge(EMVCommandChannel channel, bool LeaveFieldON, uint8_t *Result, size_t MaxResultLen, size_t *ResultLen, uint16_t *sw, struct tlvdb *tlv) 
+int EMVGenerateChallenge(EMVCommandChannel channel, bool LeaveFieldON, uint8_t *Result, size_t MaxResultLen, size_t *ResultLen, uint16_t *sw, struct tlvdb *tlv)
 {
        uint8_t get_challenge_APDU[APDU_COMMAND_LEN] = {0x00, ISO7816_GET_CHALLENGE, 0x00, 0x00};
-       
+
        int res = EMVExchange(channel, LeaveFieldON, get_challenge_APDU, 4, Result, MaxResultLen, ResultLen, sw, tlv);
        if (*sw == 0x6700) {
                PrintAndLogEx(INFO, ">>> trying to reissue command withouth Le...");
@@ -693,12 +698,12 @@ int EMVGenerateChallenge(EMVCommandChannel channel, bool LeaveFieldON, uint8_t *
        return res;
 }
 
-int EMVInternalAuthenticate(EMVCommandChannel channel, bool LeaveFieldON, uint8_t *DDOL, size_t DDOLLen, uint8_t *Result, size_t MaxResultLen, size_t *ResultLen, uint16_t *sw, struct tlvdb *tlv) 
+int EMVInternalAuthenticate(EMVCommandChannel channel, bool LeaveFieldON, uint8_t *DDOL, size_t DDOLLen, uint8_t *Result, size_t MaxResultLen, size_t *ResultLen, uint16_t *sw, struct tlvdb *tlv)
 {
        uint8_t authenticate_APDU[APDU_COMMAND_LEN] = {0x00, ISO7816_INTERNAL_AUTHENTICATE, 0x00, 0x00, DDOLLen, 0x00};
        memcpy(authenticate_APDU + 5, DDOL, DDOLLen);
        int apdulen = 5 + DDOLLen;
-       
+
        return EMVExchange(channel, LeaveFieldON, authenticate_APDU, apdulen, Result, MaxResultLen, ResultLen, sw, tlv);
 }
 
@@ -707,7 +712,7 @@ int MSCComputeCryptoChecksum(EMVCommandChannel channel, bool LeaveFieldON, uint8
        uint8_t checksum_APDU[APDU_COMMAND_LEN] = {0x80, 0x2a, 0x8e, 0x80, UDOLlen, 0x00};
        memcpy(checksum_APDU + 5, UDOL, UDOLlen);
        int apdulen = 5 + UDOLlen;
-       
+
        return EMVExchange(channel, LeaveFieldON, checksum_APDU, apdulen, Result, MaxResultLen, ResultLen, sw, tlv);
 }
 
@@ -790,7 +795,7 @@ int trDDA(EMVCommandChannel channel, bool decodeTLV, struct tlvdb *tlv) {
        }
 
        const struct tlv *sda_tlv = tlvdb_get(tlv, 0x21, NULL);
-/*     if (!sda_tlv || sda_tlv->len < 1) { it may be 0!!!!
+/*  if (!sda_tlv || sda_tlv->len < 1) { it may be 0!!!!
                emv_pk_free(pk);
                PrintAndLogEx(WARNING, "Error: Can't find input list for Offline Data Authentication. Exit.");
                return 3;
@@ -940,13 +945,13 @@ int trDDA(EMVCommandChannel channel, bool decodeTLV, struct tlvdb *tlv) {
                                // parse response 0x80
                                struct tlvdb *t80 = tlvdb_parse_multi(buf, len);
                                const struct tlv * t80tlv = tlvdb_get_tlv(t80);
-                               
+
                                // 9f4b Signed Dynamic Application Data
                                dda_db = tlvdb_fixed(0x9f4b, t80tlv->len, t80tlv->value);
                                tlvdb_add(tlv, dda_db);
-                               
+
                                tlvdb_free(t80);
-                               
+
                                if (decodeTLV){
                                        PrintAndLogEx(NORMAL, "* * Decode response format 1:");
                                        TLVPrintFromTLV(dda_db);
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