]> git.zerfleddert.de Git - proxmark3-svn/blobdiff - client/emv/cmdemv.c
Merge pull request #555 from Arnie97/master
[proxmark3-svn] / client / emv / cmdemv.c
index 3c3c1f1129b86509c89c877398b22e737e9c451a..c53b02af1a1dd1e4e58225a0f2dc905332e312ae 100644 (file)
@@ -8,7 +8,9 @@
 // EMV commands
 //-----------------------------------------------------------------------------
 
+#include <ctype.h>
 #include "cmdemv.h"
+#include "test/cryptotest.h"
 
 int UsageCmdHFEMVSelect(void) {
        PrintAndLog("HELP :  Executes select applet command:\n");
@@ -68,7 +70,7 @@ int CmdHFEMVSelect(const char *cmd) {
                                        return 1;
                }
 
-               if (isxdigit(c)) {
+               if (isxdigit((unsigned char)c)) {
                        switch(param_gethex_to_eol(cmd, cmdp, data, sizeof(data), &datalen)) {
                        case 1:
                                PrintAndLog("Invalid HEX value.");
@@ -277,34 +279,48 @@ int CmdHFEMVPPSE(const char *cmd) {
 
 int UsageCmdHFEMVExec(void) {
        PrintAndLog("HELP :  Executes EMV contactless transaction:\n");
-       PrintAndLog("Usage:  hf emv exec [-s][-a][-t]\n");
+       PrintAndLog("Usage:  hf emv exec [-s][-a][-t][-f][-v][-c][-x][-g]\n");
        PrintAndLog("  Options:");
        PrintAndLog("  -s       : select card");
        PrintAndLog("  -a       : show APDU reqests and responses\n");
        PrintAndLog("  -t       : TLV decode results\n");
        PrintAndLog("  -f       : force search AID. Search AID instead of execute PPSE.\n");
+       PrintAndLog("  -v       : transaction type - qVSDC or M/Chip.\n");
+       PrintAndLog("  -c       : transaction type - qVSDC or M/Chip plus CDA (SDAD generation).\n");
+       PrintAndLog("  -x       : transaction type - VSDC. For test only. Not a standart behavior.\n");
+       PrintAndLog("  -g       : VISA. generate AC from GPO\n");
+       PrintAndLog("By default : transaction type - MSD.\n");
        PrintAndLog("Samples:");
-       PrintAndLog(" hf emv pse -s -> select card");
-       PrintAndLog(" hf emv pse -s -t -a -> select card, show responses in TLV, show APDU");
+       PrintAndLog(" hf emv exec -s -a -t -> execute MSD transaction");
+       PrintAndLog(" hf emv exec -s -a -t -c -> execute CDA transaction");
        return 0;
 }
 
 #define TLV_ADD(tag, value)( tlvdb_add(tlvRoot, tlvdb_fixed(tag, sizeof(value) - 1, (const unsigned char *)value)) )
+#define dreturn(n) {free(pdol_data_tlv);tlvdb_free(tlvSelect);tlvdb_free(tlvRoot);DropField();return n;}
 
 int CmdHFEMVExec(const char *cmd) {
        bool activateField = false;
        bool showAPDU = false;
        bool decodeTLV = false;
        bool forceSearch = false;
+       enum TransactionType TrType = TT_MSD;
+       bool GenACGPO = false;
 
        uint8_t buf[APDU_RES_LEN] = {0};
        size_t len = 0;
        uint16_t sw = 0;
        uint8_t AID[APDU_AID_LEN] = {0};
        size_t AIDlen = 0;
+       uint8_t ODAiList[4096];
+       size_t ODAiListLen = 0;
        
        int res;
        
+       struct tlvdb *tlvSelect = NULL;
+       struct tlvdb *tlvRoot = NULL;
+       struct tlv *pdol_data_tlv = NULL;
+
        if (strlen(cmd) < 1) {
                UsageCmdHFEMVExec();
                return 0;
@@ -317,7 +333,7 @@ int CmdHFEMVExec(const char *cmd) {
                        switch (param_getchar_indx(cmd, 1, cmdp)) {
                                case 'h':
                                case 'H':
-                                       UsageCmdHFEMVPPSE();
+                                       UsageCmdHFEMVExec();
                                        return 0;
                                case 's':
                                case 'S':
@@ -335,6 +351,22 @@ int CmdHFEMVExec(const char *cmd) {
                                case 'F':
                                        forceSearch = true;
                                        break;
+                               case 'x':
+                               case 'X':
+                                       TrType = TT_VSDC;
+                                       break;
+                               case 'v':
+                               case 'V':
+                                       TrType = TT_QVSDCMCHIP;
+                                       break;
+                               case 'c':
+                               case 'C':
+                                       TrType = TT_CDA;
+                                       break;
+                               case 'g':
+                               case 'G':
+                                       GenACGPO = true;
+                                       break;
                                default:
                                        PrintAndLog("Unknown parameter '%c'", param_getchar_indx(cmd, 1, cmdp));
                                        return 1;
@@ -344,7 +376,6 @@ int CmdHFEMVExec(const char *cmd) {
 
        
        // init applets list tree
-       struct tlvdb *tlvSelect = NULL;
        const char *al = "Applets list";
        tlvSelect = tlvdb_fixed(1, strlen(al), (const unsigned char *)al);
 
@@ -368,8 +399,7 @@ int CmdHFEMVExec(const char *cmd) {
                PrintAndLog("\n* Search AID in list.");
                SetAPDULogging(false);
                if (EMVSearch(activateField, true, decodeTLV, tlvSelect)) {
-                       tlvdb_free(tlvSelect);
-                       return 2;
+                       dreturn(2);
                }
 
                // check search and select application id
@@ -378,14 +408,13 @@ int CmdHFEMVExec(const char *cmd) {
        }
        
        // Init TLV tree
-       struct tlvdb *tlvRoot = NULL;
        const char *alr = "Root terminal TLV tree";
        tlvRoot = tlvdb_fixed(1, strlen(alr), (const unsigned char *)alr);
        
        // check if we found EMV application on card
        if (!AIDlen) {
                PrintAndLog("Can't select AID. EMV AID not found");
-               return 2;
+               dreturn(2);
        }
        
        // Select
@@ -395,20 +424,40 @@ int CmdHFEMVExec(const char *cmd) {
        
        if (res) {      
                PrintAndLog("Can't select AID (%d). Exit...", res);
-               return 3;
+               dreturn(3);
        }
        
        if (decodeTLV)
                TLVPrintFromBuffer(buf, len);
        PrintAndLog("* Selected.");
        
-PrintAndLog("-----BREAK.");
-return 0;
        PrintAndLog("\n* Init transaction parameters.");
 
     //9F66:(Terminal Transaction Qualifiers (TTQ)) len:4
-       TLV_ADD(0x9F66, "\x26\x00\x00\x00"); // E6
-    //9F02:(Amount, Authorised (Numeric)) len:6
+       char *qVSDC = "\x26\x00\x00\x00";
+       if (GenACGPO) {
+               qVSDC = "\x26\x80\x00\x00";
+       }
+       switch(TrType) {
+               case TT_MSD:
+                       TLV_ADD(0x9F66, "\x86\x00\x00\x00"); // MSD
+                       break;
+               // not standard for contactless. just for test.
+               case TT_VSDC:  
+                       TLV_ADD(0x9F66, "\x46\x00\x00\x00"); // VSDC
+                       break;
+               case TT_QVSDCMCHIP:
+                       TLV_ADD(0x9F66, qVSDC); // qVSDC
+                       break;
+               case TT_CDA:
+                       TLV_ADD(0x9F66, qVSDC); // qVSDC (VISA CDA not enabled)
+                       break;
+               default:
+                       TLV_ADD(0x9F66, "\x26\x00\x00\x00"); // qVSDC
+                       break;
+       }
+       
+    //9F02:(Amount, authorized (Numeric)) len:6
        TLV_ADD(0x9F02, "\x00\x00\x00\x00\x01\x00");
     //9F1A:(Terminal Country Code) len:2
        TLV_ADD(0x9F1A, "ru");
@@ -421,53 +470,82 @@ return 0;
        TLV_ADD(0x9C,   "\x00");
        // 9F37 Unpredictable Number len:4
        TLV_ADD(0x9F37, "\x01\x02\x03\x04");
+       // 9F6A Unpredictable Number (MSD for UDOL) len:4
+       TLV_ADD(0x9F6A, "\x01\x02\x03\x04");
 
-       TLVPrintFromTLV(tlvRoot);
+       TLVPrintFromTLV(tlvRoot); // TODO delete!!!
        
        PrintAndLog("\n* Calc PDOL.");
-       struct tlv *pdol_data_tlv = dol_process(tlvdb_get(tlvRoot, 0x9f38, NULL), tlvRoot, 0x83);
+       pdol_data_tlv = dol_process(tlvdb_get(tlvRoot, 0x9f38, NULL), tlvRoot, 0x83);
        if (!pdol_data_tlv){
                PrintAndLog("ERROR: can't create PDOL TLV.");
-               return 4;
+               dreturn(4);
        }
        
        size_t pdol_data_tlv_data_len;
        unsigned char *pdol_data_tlv_data = tlv_encode(pdol_data_tlv, &pdol_data_tlv_data_len);
        if (!pdol_data_tlv_data) {
                PrintAndLog("ERROR: can't create PDOL data.");
-               return 4;
+               dreturn(4);
        }
        PrintAndLog("PDOL data[%d]: %s", pdol_data_tlv_data_len, sprint_hex(pdol_data_tlv_data, pdol_data_tlv_data_len));
 
-//PrintAndLog("-----BREAK.");
-//return 0;
        PrintAndLog("\n* GPO.");
        res = EMVGPO(true, pdol_data_tlv_data, pdol_data_tlv_data_len, buf, sizeof(buf), &len, &sw, tlvRoot);
        
-       free(pdol_data_tlv);
+       free(pdol_data_tlv_data);
+       //free(pdol_data_tlv); --- free on exit.
        
        if (res) {      
                PrintAndLog("GPO error(%d): %4x. Exit...", res, sw);
-               return 5;
+               dreturn(5);
        }
 
        // process response template format 1 [id:80  2b AIP + x4b AFL] and format 2 [id:77 TLV]
        if (buf[0] == 0x80) {
-               
-               
-               
                if (decodeTLV){
                        PrintAndLog("GPO response format1:");
                        TLVPrintFromBuffer(buf, len);
                }
-       } else {
-               
-               
                
+               if (len < 4 || (len - 4) % 4) {
+                       PrintAndLog("ERROR: GPO response format1 parsing error. length=%d", len);
+               } else {
+                       // AIP
+                       struct tlvdb * f1AIP = tlvdb_fixed(0x82, 2, buf + 2);
+                       tlvdb_add(tlvRoot, f1AIP);
+                       if (decodeTLV){
+                               PrintAndLog("\n* * Decode response format 1 (0x80) AIP and AFL:");
+                               TLVPrintFromTLV(f1AIP);
+                       }
+
+                       // AFL
+                       struct tlvdb * f1AFL = tlvdb_fixed(0x94, len - 4, buf + 2 + 2);
+                       tlvdb_add(tlvRoot, f1AFL);
+                       if (decodeTLV)
+                               TLVPrintFromTLV(f1AFL);
+               }               
+       } else {
                if (decodeTLV)
                        TLVPrintFromBuffer(buf, len);
        }
        
+       // extract PAN from track2
+       {
+               const struct tlv *track2 = tlvdb_get(tlvRoot, 0x57, NULL);
+               if (!tlvdb_get(tlvRoot, 0x5a, NULL) && track2 && track2->len >= 8) {
+                       struct tlvdb *pan = GetPANFromTrack2(track2);
+                       if (pan) {
+                               tlvdb_add(tlvRoot, pan); 
+                               
+                               const struct tlv *pantlv = tlvdb_get(tlvRoot, 0x5a, NULL);      
+                               PrintAndLog("\n* * Extracted PAN from track2: %s", sprint_hex(pantlv->value, pantlv->len));
+                       } else {
+                               PrintAndLog("\n* * WARNING: Can't extract PAN from track2.");
+                       }
+               }
+       }
+       
        PrintAndLog("\n* Read records from AFL.");
        const struct tlv *AFL = tlvdb_get(tlvRoot, 0x94, NULL);
        if (!AFL || !AFL->len) {
@@ -506,9 +584,23 @@ return 0;
                                        PrintAndLog("");
                                }
                                
+                               // Build Input list for Offline Data Authentication
+                               // EMV 4.3 book3 10.3, page 96
                                if (SFIoffline) {
-                                       // here will be offline records storing...
-                                       // dont foget: if (sfi < 11)
+                                       if (SFI < 11) {
+                                               const unsigned char *abuf = buf;
+                                               size_t elmlen = len;
+                                               struct tlv e;
+                                               if (tlv_parse_tl(&abuf, &elmlen, &e)) {
+                                                       memcpy(&ODAiList[ODAiListLen], &buf[len - elmlen], elmlen);
+                                                       ODAiListLen += elmlen;
+                                               } else {
+                                                       PrintAndLog("ERROR SFI[%02x]. Creating input list for Offline Data Authentication error.", SFI);
+                                               }
+                                       } else {
+                                               memcpy(&ODAiList[ODAiListLen], buf, len);
+                                               ODAiListLen += len;
+                                       }
                                }
                        }
                }
@@ -516,13 +608,218 @@ return 0;
                break;
        }       
        
-       // additional contacless EMV commands (fDDA, CDA, external authenticate)
+       // copy Input list for Offline Data Authentication
+       if (ODAiListLen) {
+               struct tlvdb *oda = tlvdb_fixed(0x21, ODAiListLen, ODAiList); // not a standard tag
+               tlvdb_add(tlvRoot, oda); 
+               PrintAndLog("* Input list for Offline Data Authentication added to TLV. len=%d \n", ODAiListLen);
+       }
+       
+       // get AIP
+       const struct tlv *AIPtlv = tlvdb_get(tlvRoot, 0x82, NULL);      
+       uint16_t AIP = AIPtlv->value[0] + AIPtlv->value[1] * 0x100;
+       PrintAndLog("* * AIP=%04x", AIP);
+
+       // SDA
+       if (AIP & 0x0040) {
+               PrintAndLog("\n* SDA");
+               trSDA(tlvRoot);
+       }
+
+       // DDA
+       if (AIP & 0x0020) {
+               PrintAndLog("\n* DDA");
+               trDDA(decodeTLV, tlvRoot);
+       }       
        
+       // transaction check
+       
+       // qVSDC
+       if (TrType == TT_QVSDCMCHIP|| TrType == TT_CDA){
+               // 9F26: Application Cryptogram
+               const struct tlv *AC = tlvdb_get(tlvRoot, 0x9F26, NULL);
+               if (AC) {
+                       PrintAndLog("\n--> qVSDC transaction.");
+                       PrintAndLog("* AC path");
+                       
+                       // 9F36: Application Transaction Counter (ATC)
+                       const struct tlv *ATC = tlvdb_get(tlvRoot, 0x9F36, NULL);
+                       if (ATC) {
+                       
+                               // 9F10: Issuer Application Data - optional
+                               const struct tlv *IAD = tlvdb_get(tlvRoot, 0x9F10, NULL);
+
+                               // print AC data
+                               PrintAndLog("ATC: %s", sprint_hex(ATC->value, ATC->len));
+                               PrintAndLog("AC: %s", sprint_hex(AC->value, AC->len));
+                               if (IAD){
+                                       PrintAndLog("IAD: %s", sprint_hex(IAD->value, IAD->len));
+                                       
+                                       if (IAD->len >= IAD->value[0] + 1) {
+                                               PrintAndLog("\tKey index:  0x%02x", IAD->value[1]);
+                                               PrintAndLog("\tCrypto ver: 0x%02x(%03d)", IAD->value[2], IAD->value[2]);
+                                               PrintAndLog("\tCVR:", sprint_hex(&IAD->value[3], IAD->value[0] - 2));
+                                               struct tlvdb * cvr = tlvdb_fixed(0x20, IAD->value[0] - 2, &IAD->value[3]);
+                                               TLVPrintFromTLVLev(cvr, 1);
+                                       }
+                               } else {
+                                       PrintAndLog("WARNING: IAD not found.");
+                               }
+                               
+                       } else {
+                               PrintAndLog("ERROR AC: Application Transaction Counter (ATC) not found.");
+                       }
+               }
+       }
        
+       // Mastercard M/CHIP
+       if (GetCardPSVendor(AID, AIDlen) == CV_MASTERCARD && (TrType == TT_QVSDCMCHIP || TrType == TT_CDA)){
+               const struct tlv *CDOL1 = tlvdb_get(tlvRoot, 0x8c, NULL);
+               if (CDOL1 && GetCardPSVendor(AID, AIDlen) == CV_MASTERCARD) { // and m/chip transaction flag
+                       PrintAndLog("\n--> Mastercard M/Chip transaction.");
+
+                       PrintAndLog("* * Generate challenge");
+                       res = EMVGenerateChallenge(true, buf, sizeof(buf), &len, &sw, tlvRoot);
+                       if (res) {
+                               PrintAndLog("ERROR GetChallenge. APDU error %4x", sw);
+                               dreturn(6);
+                       }
+                       if (len < 4) {
+                               PrintAndLog("ERROR GetChallenge. Wrong challenge length %d", len);
+                               dreturn(6);
+                       }
+                       
+                       // ICC Dynamic Number
+                       struct tlvdb * ICCDynN = tlvdb_fixed(0x9f4c, len, buf);
+                       tlvdb_add(tlvRoot, ICCDynN);
+                       if (decodeTLV){
+                               PrintAndLog("\n* * ICC Dynamic Number:");
+                               TLVPrintFromTLV(ICCDynN);
+                       }
+                       
+                       PrintAndLog("* * Calc CDOL1");
+                       struct tlv *cdol_data_tlv = dol_process(tlvdb_get(tlvRoot, 0x8c, NULL), tlvRoot, 0x01); // 0x01 - dummy tag
+                       if (!cdol_data_tlv){
+                               PrintAndLog("ERROR: can't create CDOL1 TLV.");
+                               dreturn(6);
+                       }
+                       PrintAndLog("CDOL1 data[%d]: %s", cdol_data_tlv->len, sprint_hex(cdol_data_tlv->value, cdol_data_tlv->len));
+                       
+                       PrintAndLog("* * AC1");
+                       // EMVAC_TC + EMVAC_CDAREQ --- to get SDAD
+                       res = EMVAC(true, (TrType == TT_CDA) ? EMVAC_TC + EMVAC_CDAREQ : EMVAC_TC, (uint8_t *)cdol_data_tlv->value, cdol_data_tlv->len, buf, sizeof(buf), &len, &sw, tlvRoot);
+                       
+                       if (res) {      
+                               PrintAndLog("AC1 error(%d): %4x. Exit...", res, sw);
+                               dreturn(7);
+                       }
+                       
+                       if (decodeTLV)
+                               TLVPrintFromBuffer(buf, len);
+                       
+                       // CDA
+                       PrintAndLog("\n* CDA:");
+                       struct tlvdb *ac_tlv = tlvdb_parse_multi(buf, len);
+                       res = trCDA(tlvRoot, ac_tlv, pdol_data_tlv, cdol_data_tlv);
+                       if (res) {      
+                               PrintAndLog("CDA error (%d)", res);
+                       }
+                       free(ac_tlv);
+                       free(cdol_data_tlv);
+                       
+                       PrintAndLog("\n* M/Chip transaction result:");
+                       // 9F27: Cryptogram Information Data (CID)
+                       const struct tlv *CID = tlvdb_get(tlvRoot, 0x9F27, NULL);
+                       if (CID) {
+                               emv_tag_dump(CID, stdout, 0);
+                               PrintAndLog("------------------------------");
+                               if (CID->len > 0) {
+                                       switch(CID->value[0] & EMVAC_AC_MASK){
+                                               case EMVAC_AAC:
+                                                       PrintAndLog("Transaction DECLINED.");
+                                                       break;
+                                               case EMVAC_TC:
+                                                       PrintAndLog("Transaction approved OFFLINE.");
+                                                       break;
+                                               case EMVAC_ARQC:
+                                                       PrintAndLog("Transaction approved ONLINE.");
+                                                       break;
+                                               default:
+                                                       PrintAndLog("ERROR: CID transaction code error %2x", CID->value[0] & EMVAC_AC_MASK);
+                                                       break;
+                                       }
+                               } else {
+                                       PrintAndLog("ERROR: Wrong CID length %d", CID->len);
+                               }
+                       } else {
+                               PrintAndLog("ERROR: CID(9F27) not found.");
+                       }
+               
+               }
+       }
+               
+       // MSD
+       if (AIP & 0x8000 && TrType == TT_MSD) { 
+               PrintAndLog("\n--> MSD transaction.");
+               
+               PrintAndLog("* MSD dCVV path. Check dCVV");
+
+               const struct tlv *track2 = tlvdb_get(tlvRoot, 0x57, NULL);
+               if (track2) {
+                       PrintAndLog("Track2: %s", sprint_hex(track2->value, track2->len));
+
+                       struct tlvdb *dCVV = GetdCVVRawFromTrack2(track2);
+                       PrintAndLog("dCVV raw data:");
+                       TLVPrintFromTLV(dCVV);
+                       
+                       if (GetCardPSVendor(AID, AIDlen) == CV_MASTERCARD) {
+                               PrintAndLog("\n* Mastercard calculate UDOL");
+
+                               // UDOL (9F69)
+                               const struct tlv *UDOL = tlvdb_get(tlvRoot, 0x9F69, NULL);
+                               // UDOL(9F69) default: 9F6A (Unpredictable number) 4 bytes
+                               const struct tlv defUDOL = {
+                                       .tag = 0x01,
+                                       .len = 3,
+                                       .value = (uint8_t *)"\x9f\x6a\x04",
+                               };
+                               if (!UDOL)
+                                       PrintAndLog("Use default UDOL.");
+
+                               struct tlv *udol_data_tlv = dol_process(UDOL ? UDOL : &defUDOL, tlvRoot, 0x01); // 0x01 - dummy tag
+                               if (!udol_data_tlv){
+                                       PrintAndLog("ERROR: can't create UDOL TLV.");
+                                       dreturn(8);
+                               }
+
+                               PrintAndLog("UDOL data[%d]: %s", udol_data_tlv->len, sprint_hex(udol_data_tlv->value, udol_data_tlv->len));
+                               
+                               PrintAndLog("\n* Mastercard compute cryptographic checksum(UDOL)");
+                               
+                               res = MSCComputeCryptoChecksum(true, (uint8_t *)udol_data_tlv->value, udol_data_tlv->len, buf, sizeof(buf), &len, &sw, tlvRoot);
+                               if (res) {
+                                       PrintAndLog("ERROR Compute Crypto Checksum. APDU error %4x", sw);
+                                       free(udol_data_tlv);
+                                       dreturn(9);
+                               }
+                               
+                               if (decodeTLV) {
+                                       TLVPrintFromBuffer(buf, len);
+                                       PrintAndLog("");
+                               }
+                               free(udol_data_tlv);
+
+                       }
+               } else {
+                       PrintAndLog("ERROR MSD: Track2 data not found.");
+               }
+       }
+
        // DropField
        DropField();
        
        // Destroy TLV's
+       free(pdol_data_tlv);
        tlvdb_free(tlvSelect);
        tlvdb_free(tlvRoot);
 
@@ -531,6 +828,10 @@ return 0;
        return 0;
 }
 
+int CmdHFEMVTest(const char *cmd) {
+       return ExecuteCryptoTests(true);
+}
+
 int CmdHelp(const char *Cmd);
 static command_t CommandTable[] =  {
        {"help",        CmdHelp,                1,      "This help"},
@@ -538,6 +839,7 @@ static command_t CommandTable[] =  {
        {"pse",         CmdHFEMVPPSE,   0,      "Execute PPSE. It selects 2PAY.SYS.DDF01 or 1PAY.SYS.DDF01 directory."},
        {"search",      CmdHFEMVSearch, 0,      "Try to select all applets from applets list and print installed applets."},
        {"select",      CmdHFEMVSelect, 0,      "Select applet."},
+       {"test",        CmdHFEMVTest,   0,      "Crypto logic test."},
        {NULL, NULL, 0, NULL}
 };
 
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