Add ROCA vulnerability test (RRG repository PR 76 by @merlokk) (#762)
[proxmark3-svn] / client / emv / cmdemv.c
index d9a43cb9a305fa972372720601934386490fec24..e7676501edf27a90bee12c5412cb07718381aef0 100644 (file)
@@ -8,14 +8,20 @@
 // EMV commands
 //-----------------------------------------------------------------------------
 
+#include "cmdemv.h"
+
 #include <ctype.h>
+#include "proxmark3.h"
+#include "cmdparser.h"
 #include "mifare.h"
-#include "cmdemv.h"
 #include "emvjson.h"
 #include "emv_pki.h"
+#include "emvcore.h"
 #include "test/cryptotest.h"
 #include "cliparser/cliparser.h"
-#include <jansson.h>
+#include "jansson.h"
+#include "emv_roca.h"
+
 
 #define TLV_ADD(tag, value)( tlvdb_change_or_add_node(tlvRoot, tag, sizeof(value) - 1, (const unsigned char *)value) )
 void ParamLoadDefaults(struct tlvdb *tlvRoot) {
@@ -323,10 +329,8 @@ int CmdEMVReadRecord(const char *cmd) {
                arg_lit0("kK",  "keep",    "keep field ON for next command"),
                arg_lit0("aA",  "apdu",    "show APDU reqests and responses"),
                arg_lit0("tT",  "tlv",     "TLV decode results of selected applets"),
-#ifdef WITH_SMARTCARD
                arg_lit0("wW",  "wired",   "Send data via contact (iso7816) interface. Contactless interface set by default."),
-#endif
-               arg_strx1(NULL,  NULL,     "<SFI 1byte HEX><SFIrec 1byte HEX>", NULL),
+               arg_strx1(NULL,  NULL,     "<SFI 1byte HEX><SFIrecord 1byte HEX>", NULL),
                arg_param_end
        };
        CLIExecWithReturn(cmd, argtable, true);
@@ -544,8 +548,11 @@ int CmdEMVInternalAuthenticate(const char *cmd) {
        int datalen = 0;
 
        CLIParserInit("emv intauth", 
-               "Generate Internal Authenticate command. Usually needs 4-byte random number. It returns data in TLV format .\nNeeds a EMV applet to be selected and GPO to be executed.", 
-               "Usage:\n\temv intauth -k 01020304 -> execute Internal Authenticate with 4-byte DDOLdata and keep field ON after command\n"
+               "Generate Internal Authenticate command. Usually needs 4-byte random number. It returns data in TLV format .\n"
+               "Needs a EMV applet to be selected and GPO to be executed.", 
+               
+               "Usage:\n"
+               "\temv intauth -k 01020304 -> execute Internal Authenticate with 4-byte DDOLdata and keep field ON after command\n"
                        "\temv intauth -t 01020304 -> execute Internal Authenticate with 4-byte DDOL data, show result in TLV\n"
                        "\temv intauth -pmt 9F 37 04 -> load params from file, make DDOL data from DDOL, Internal Authenticate with DDOL, show result in TLV"); 
 
@@ -720,7 +727,8 @@ int CmdEMVExec(const char *cmd) {
 
        CLIParserInit("emv exec", 
                "Executes EMV contactless transaction", 
-               "Usage:\n\temv exec -sat -> select card, execute MSD transaction, show APDU and TLV\n"
+               "Usage:\n"
+                       "\temv exec -sat -> select card, execute MSD transaction, show APDU and TLV\n"
                        "\temv exec -satc -> select card, execute CDA transaction, show APDU and TLV\n");
 
        void* argtable[] = {
@@ -735,9 +743,7 @@ int CmdEMVExec(const char *cmd) {
                arg_lit0("cC",  "qvsdccda", "Transaction type - qVSDC or M/Chip plus CDA (SDAD generation)."),
                arg_lit0("xX",  "vsdc",     "Transaction type - VSDC. For test only. Not a standart behavior."),
                arg_lit0("gG",  "acgpo",    "VISA. generate AC from GPO."),
-#ifdef WITH_SMARTCARD
                arg_lit0("wW",  "wired",   "Send data via contact (iso7816) interface. Contactless interface set by default."),
-#endif
                arg_param_end
        };
        CLIExecWithReturn(cmd, argtable, true);
@@ -762,6 +768,7 @@ int CmdEMVExec(const char *cmd) {
        if (arg_get_lit(11))
                channel = ECC_CONTACT;
 #endif
+       uint8_t psenum = (channel == ECC_CONTACT) ? 1 : 2;
        CLIParserFree();
        
        SetAPDULogging(showAPDU);
@@ -776,7 +783,7 @@ int CmdEMVExec(const char *cmd) {
                // PPSE
                PrintAndLogEx(NORMAL, "\n* PPSE.");
                SetAPDULogging(showAPDU);
-               res = EMVSearchPSE(channel, activateField, true, decodeTLV, tlvSelect);
+               res = EMVSearchPSE(channel, activateField, true, psenum, decodeTLV, tlvSelect);
 
                // check PPSE and select application id
                if (!res) { 
@@ -1212,12 +1219,14 @@ int CmdEMVScan(const char *cmd) {
        char *crelfname = (char *)relfname;
        int relfnamelen = 0;
 #ifdef WITH_SMARTCARD  
-       if (arg_get_lit(11))
+       if (arg_get_lit(11)) {
                channel = ECC_CONTACT;
+       }
        CLIGetStrWithReturn(12, relfname, &relfnamelen);
 #else
        CLIGetStrWithReturn(11, relfname, &relfnamelen);
 #endif
+       uint8_t psenum = (channel == ECC_CONTACT) ? 1 : 2;
        CLIParserFree();
        
        SetAPDULogging(showAPDU);
@@ -1292,7 +1301,7 @@ int CmdEMVScan(const char *cmd) {
                tlvdb_free(fci);
        }
 
-       res = EMVSearchPSE(channel, false, true, decodeTLV, tlvSelect);
+       res = EMVSearchPSE(channel, false, true, psenum, decodeTLV, tlvSelect);
 
        // check PPSE and select application id
        if (!res) { 
@@ -1502,7 +1511,225 @@ int CmdEMVTest(const char *cmd) {
        return ExecuteCryptoTests(true);
 }
 
+int CmdEMVRoca(const char *cmd) {
+       uint8_t AID[APDU_AID_LEN] = {0};
+       size_t AIDlen = 0;
+       uint8_t buf[APDU_RES_LEN] = {0};
+       size_t len = 0;
+       uint16_t sw = 0;
+       int res;
+               
+       CLIParserInit("emv roca", 
+               "Tries to extract public keys and run the ROCA test against them.\n", 
+               "Usage:\n"
+                       "\temv roca -w -> select CONTACT card and run test\n\temv roca -> select CONTACTLESS card and run test\n");
+
+       void* argtable[] = {
+               arg_param_begin,
+               arg_lit0("wW",  "wired",   "Send data via contact (iso7816) interface. Contactless interface set by default."),
+               arg_param_end
+       };
+       CLIExecWithReturn(cmd, argtable, true);
+       
+       EMVCommandChannel channel = ECC_CONTACTLESS;
+       if (arg_get_lit(1))
+               channel = ECC_CONTACT;
+
+       // select card
+       uint8_t psenum = (channel == ECC_CONTACT) ? 1 : 2;
+       
+       SetAPDULogging(false);
+       
+       // init applets list tree
+       const char *al = "Applets list";
+       struct tlvdb *tlvSelect = tlvdb_fixed(1, strlen(al), (const unsigned char *)al);
+
+       // EMV PPSE
+       PrintAndLogEx(NORMAL, "--> PPSE.");
+       res = EMVSearchPSE(channel, false, true, psenum, false, tlvSelect);
+
+       // check PPSE and select application id
+       if (!res) {     
+               TLVPrintAIDlistFromSelectTLV(tlvSelect);                
+       } else {
+               // EMV SEARCH with AID list
+               PrintAndLogEx(NORMAL, "--> AID search.");
+               if (EMVSearch(channel, false, true, false, tlvSelect)) {
+                       PrintAndLogEx(ERR, "Can't found any of EMV AID. Exit...");
+                       tlvdb_free(tlvSelect);
+                       DropField();
+                       return 3;
+               }
+
+               // check search and select application id
+               TLVPrintAIDlistFromSelectTLV(tlvSelect);
+       }
+
+       // EMV SELECT application
+       SetAPDULogging(false);
+       EMVSelectApplication(tlvSelect, AID, &AIDlen);
+
+       tlvdb_free(tlvSelect);
+
+       if (!AIDlen) {
+               PrintAndLogEx(INFO, "Can't select AID. EMV AID not found. Exit...");
+               DropField();
+               return 4;
+       }
+
+       // Init TLV tree
+       const char *alr = "Root terminal TLV tree";
+       struct tlvdb *tlvRoot = tlvdb_fixed(1, strlen(alr), (const unsigned char *)alr);
+
+       // EMV SELECT applet
+       PrintAndLogEx(NORMAL, "\n-->Selecting AID:%s.", sprint_hex_inrow(AID, AIDlen));
+       res = EMVSelect(channel, false, true, AID, AIDlen, buf, sizeof(buf), &len, &sw, tlvRoot);
+       
+       if (res) {      
+               PrintAndLogEx(ERR, "Can't select AID (%d). Exit...", res);
+               tlvdb_free(tlvRoot);
+               DropField();
+               return 5;
+       }
+
+       PrintAndLog("\n* Init transaction parameters.");
+       InitTransactionParameters(tlvRoot, true, TT_QVSDCMCHIP, false);
+
+       PrintAndLogEx(NORMAL, "-->Calc PDOL.");
+       struct tlv *pdol_data_tlv = dol_process(tlvdb_get(tlvRoot, 0x9f38, NULL), tlvRoot, 0x83);
+       if (!pdol_data_tlv){
+               PrintAndLogEx(ERR, "Can't create PDOL TLV.");
+               tlvdb_free(tlvRoot);
+               DropField();
+               return 6;
+       }
+       
+       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) {
+               PrintAndLogEx(ERR, "Can't create PDOL data.");
+               tlvdb_free(tlvRoot);
+               DropField();
+               return 6;
+       }
+       PrintAndLogEx(INFO, "PDOL data[%d]: %s", pdol_data_tlv_data_len, sprint_hex(pdol_data_tlv_data, pdol_data_tlv_data_len));
+
+       PrintAndLogEx(INFO, "-->GPO.");
+       res = EMVGPO(channel, true, pdol_data_tlv_data, pdol_data_tlv_data_len, buf, sizeof(buf), &len, &sw, tlvRoot);
+       
+       free(pdol_data_tlv_data);
+       free(pdol_data_tlv);
+       
+       if (res) {      
+               PrintAndLogEx(ERR, "GPO error(%d): %4x. Exit...", res, sw);
+               tlvdb_free(tlvRoot);
+               DropField();
+               return 7;
+       }
+       ProcessGPOResponseFormat1(tlvRoot, buf, len, false);
+       
+       PrintAndLogEx(INFO, "-->Read records from AFL.");
+       const struct tlv *AFL = tlvdb_get(tlvRoot, 0x94, NULL);
+       
+       while(AFL && AFL->len) {
+               if (AFL->len % 4) {
+                       PrintAndLogEx(ERR, "Wrong AFL length: %d", AFL->len);
+                       break;
+               }
+
+               for (int i = 0; i < AFL->len / 4; i++) {
+                       uint8_t SFI = AFL->value[i * 4 + 0] >> 3;
+                       uint8_t SFIstart = AFL->value[i * 4 + 1];
+                       uint8_t SFIend = AFL->value[i * 4 + 2];
+                       uint8_t SFIoffline = AFL->value[i * 4 + 3];
+                       
+                       PrintAndLogEx(INFO, "--->SFI[%02x] start:%02x end:%02x offline:%02x", SFI, SFIstart, SFIend, SFIoffline);
+                       if (SFI == 0 || SFI == 31 || SFIstart == 0 || SFIstart > SFIend) {
+                               PrintAndLogEx(ERR, "SFI ERROR! Skipped...");
+                               continue;
+                       }
+                       
+                       for(int n = SFIstart; n <= SFIend; n++) {
+                               PrintAndLogEx(INFO, "---->SFI[%02x] %d", SFI, n);
+                               
+                               res = EMVReadRecord(channel, true, SFI, n, buf, sizeof(buf), &len, &sw, tlvRoot);
+                               if (res) {
+                                       PrintAndLogEx(ERR, "SFI[%02x]. APDU error %4x", SFI, sw);
+                                       continue;
+                               }
+                       }
+               }
+               
+               break;
+       }
+
+       // getting certificates
+       if (tlvdb_get(tlvRoot, 0x90, NULL)) {
+               PrintAndLogEx(INFO, "-->Recovering certificates.");
+               PKISetStrictExecution(false);
+
+               struct emv_pk *pk = get_ca_pk(tlvRoot);
+               if (!pk) {
+                       PrintAndLogEx(ERR, "ERROR: Key not found. Exit.");
+                       goto out;
+               }
+
+               struct emv_pk *issuer_pk = emv_pki_recover_issuer_cert(pk, tlvRoot);
+               if (!issuer_pk) {
+                       emv_pk_free(pk);
+                       PrintAndLogEx(WARNING, "WARNING: Issuer certificate not found. Exit.");
+                       goto out;
+               }
+       
+               PrintAndLogEx(SUCCESS, "Issuer PK recovered. RID %s IDX %02hhx CSN %s",
+                               sprint_hex(issuer_pk->rid, 5),
+                               issuer_pk->index,
+                               sprint_hex(issuer_pk->serial, 3)
+                               );
+
+
+               struct emv_pk *icc_pk = emv_pki_recover_icc_cert(issuer_pk, tlvRoot, NULL);
+               if (!icc_pk) {
+                       emv_pk_free(pk);
+                       emv_pk_free(issuer_pk);
+                       PrintAndLogEx(WARNING, "WARNING: ICC certificate not found. Exit.");
+                       goto out;
+               }
+               PrintAndLogEx(SUCCESS, "ICC PK recovered. RID %s IDX %02hhx CSN %s\n",
+                               sprint_hex(icc_pk->rid, 5),
+                               icc_pk->index,
+                               sprint_hex(icc_pk->serial, 3)
+                               );
+               
+               PrintAndLogEx(INFO, "ICC pk modulus: %s", sprint_hex_inrow(icc_pk->modulus, icc_pk->mlen));
+               
+               //      icc_pk->exp, icc_pk->elen
+               //      icc_pk->modulus, icc_pk->mlen
+               if (icc_pk->elen > 0 && icc_pk->mlen > 0) {
+                       if (emv_rocacheck(icc_pk->modulus, icc_pk->mlen, true)) {
+                               PrintAndLogEx(INFO, "ICC pk is a subject to ROCA vulnerability, insecure..");
+                       } else {
+                               PrintAndLogEx(INFO, "ICC pk is OK(");
+                       }
+               }               
+               
+               PKISetStrictExecution(true);
+       }
+
+out:
+       
+       // free tlv object
+       tlvdb_free(tlvRoot);
+
+       if ( channel == ECC_CONTACTLESS)
+               DropField();
+
+
+       return 0;
+}
+
 int CmdHelp(const char *Cmd);
+
 static command_t CommandTable[] =  {
        {"help",        CmdHelp,                    1,  "This help"},
        {"exec",        CmdEMVExec,                 0,  "Executes EMV contactless transaction."},
@@ -1516,6 +1743,7 @@ static command_t CommandTable[] =  {
        {"intauth",     CmdEMVInternalAuthenticate, 0,  "Internal authentication."},
        {"scan",        CmdEMVScan,                 0,  "Scan EMV card and save it contents to json file for emulator."},
        {"test",        CmdEMVTest,                 0,  "Crypto logic test."},
+       {"roca",        CmdEMVRoca,                 0,  "Extract public keys and run ROCA test"}, 
        {NULL,          NULL,                       0,  NULL}
 };
 
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