Refactoring uart interface (#341)

[proxmark3-svn] / client / cmdhficlass.c

diff --git a/client/cmdhficlass.c b/client/cmdhficlass.c
index 99070e18e8d847f0ecf0a61c22b29ce8fc7f9d47..7630b3a12f7b9b7d7e1b64849c81555d440ba417 100644 (file)
--- a/client/cmdhficlass.c
+++ b/client/cmdhficlass.c
@@ -33,8 +33,6 @@
 #include "usb_cmd.h"
 #include "cmdhfmfu.h"
 
 #include "usb_cmd.h"
 #include "cmdhfmfu.h"
 

-#define llX PRIx64
-

 static int CmdHelp(const char *Cmd);
 
 #define ICLASS_KEYS_MAX 8
 static int CmdHelp(const char *Cmd);
 
 #define ICLASS_KEYS_MAX 8


@@ -182,10 +180,10 @@ int CmdHFiClassSim(const char *Cmd) {
 
 int HFiClassReader(const char *Cmd, bool loop, bool verbose) {
        bool tagFound = false;
 
 int HFiClassReader(const char *Cmd, bool loop, bool verbose) {
        bool tagFound = false;

-       UsbCommand c = {CMD_READER_ICLASS, {FLAG_ICLASS_READER_CSN|
-                                       FLAG_ICLASS_READER_CONF|FLAG_ICLASS_READER_AA}};
+       UsbCommand c = {CMD_READER_ICLASS, {FLAG_ICLASS_READER_CSN |
+                   FLAG_ICLASS_READER_CC | FLAG_ICLASS_READER_CONF | FLAG_ICLASS_READER_AA |
+                   FLAG_ICLASS_READER_ONLY_ONCE | FLAG_ICLASS_READER_ONE_TRY } };

        // loop in client not device - else on windows have a communication error
        // loop in client not device - else on windows have a communication error

-       c.arg[0] |= FLAG_ICLASS_READER_ONLY_ONCE | FLAG_ICLASS_READER_ONE_TRY;

        UsbCommand resp;
        while(!ukbhit()){
                SendCommand(&c);
        UsbCommand resp;
        while(!ukbhit()){
                SendCommand(&c);


@@ -193,21 +191,34 @@ int HFiClassReader(const char *Cmd, bool loop, bool verbose) {
                        uint8_t readStatus = resp.arg[0] & 0xff;
                        uint8_t *data = resp.d.asBytes;
 
                        uint8_t readStatus = resp.arg[0] & 0xff;
                        uint8_t *data = resp.d.asBytes;
 

-                       if (verbose)
-                               PrintAndLog("Readstatus:%02x", readStatus);
-                       if( readStatus == 0){
-                               //Aborted
+                       // no tag found or button pressed
+                       if( (readStatus == 0 && !loop) || readStatus == 0xFF) {
+                               // abort

                                if (verbose) PrintAndLog("Quitting...");
                                return 0;
                        }
                                if (verbose) PrintAndLog("Quitting...");
                                return 0;
                        }

-                       if( readStatus & FLAG_ICLASS_READER_CSN){
-                               PrintAndLog("CSN: %s",sprint_hex(data,8));
+
+                       if( readStatus & FLAG_ICLASS_READER_CSN) {
+                               PrintAndLog("   CSN: %s",sprint_hex(data,8));

                                tagFound = true;
                        }
                                tagFound = true;
                        }

-                       if( readStatus & FLAG_ICLASS_READER_CC)  PrintAndLog("CC: %s",sprint_hex(data+16,8));
-                       if( readStatus & FLAG_ICLASS_READER_CONF){
+                       if( readStatus & FLAG_ICLASS_READER_CC) { 
+                               PrintAndLog("    CC: %s",sprint_hex(data+16,8));
+                       }
+                       if( readStatus & FLAG_ICLASS_READER_CONF) {

                                printIclassDumpInfo(data);
                        }
                                printIclassDumpInfo(data);
                        }

+                       if (readStatus & FLAG_ICLASS_READER_AA) {
+                               bool legacy = true;
+                               PrintAndLog(" AppIA: %s",sprint_hex(data+8*5,8));
+                               for (int i = 0; i<8; i++) {
+                                       if (data[8*5+i] != 0xFF) {
+                                               legacy = false;
+                                       } 
+                               }
+                               PrintAndLog("      : Possible iClass %s",(legacy) ? "(legacy tag)" : "(NOT legacy tag)");
+                       }
+

                        if (tagFound && !loop) return 1;
                } else {
                        if (verbose) PrintAndLog("Command execute timeout");
                        if (tagFound && !loop) return 1;
                } else {
                        if (verbose) PrintAndLog("Command execute timeout");


@@ -283,8 +294,13 @@ int CmdHFiClassELoad(const char *Cmd) {
        long fsize = ftell(f);
        fseek(f, 0, SEEK_SET);
 
        long fsize = ftell(f);
        fseek(f, 0, SEEK_SET);
 

-       uint8_t *dump = malloc(fsize);
+       if (fsize < 0) {
+               PrintAndLog("Error, when getting filesize");
+               fclose(f);
+               return 1;
+       }

 
 

+       uint8_t *dump = malloc(fsize);

 
        size_t bytes_read = fread(dump, 1, fsize, f);
        fclose(f);
 
        size_t bytes_read = fread(dump, 1, fsize, f);
        fclose(f);


@@ -368,10 +384,13 @@ int CmdHFiClassDecrypt(const char *Cmd) {
        //Open the tagdump-file
        FILE *f;
        char filename[FILE_PATH_SIZE];
        //Open the tagdump-file
        FILE *f;
        char filename[FILE_PATH_SIZE];

-       if(opt == 'f' && param_getstr(Cmd, 1, filename) > 0)
-       {
+       if(opt == 'f' && param_getstr(Cmd, 1, filename) > 0) {

                f = fopen(filename, "rb");
                f = fopen(filename, "rb");

-       }else{
+               if ( f == NULL ) {
+                       PrintAndLog("Could not find file %s", filename);
+                       return 1;
+               }
+       } else {

                return usage_hf_iclass_decrypt();
        }
 
                return usage_hf_iclass_decrypt();
        }
 


@@ -406,7 +425,7 @@ int CmdHFiClassDecrypt(const char *Cmd) {
        fclose(f);
 
        saveFile(outfilename,"bin", decrypted, blocknum*8);
        fclose(f);
 
        saveFile(outfilename,"bin", decrypted, blocknum*8);

-
+       free(decrypted);

        return 0;
 }
 
        return 0;
 }
 


@@ -591,7 +610,7 @@ int CmdHFiClassReader_Dump(const char *Cmd) {
                                errors = param_gethex(tempStr, 0, CreditKEY, dataLen);
                        } else if (dataLen == 1) {
                                keyNbr = param_get8(Cmd, cmdp+1);
                                errors = param_gethex(tempStr, 0, CreditKEY, dataLen);
                        } else if (dataLen == 1) {
                                keyNbr = param_get8(Cmd, cmdp+1);

-                               if (keyNbr <= ICLASS_KEYS_MAX) {
+                               if (keyNbr < ICLASS_KEYS_MAX) {

                                        memcpy(CreditKEY, iClass_Key_Table[keyNbr], 8);
                                } else {
                                        PrintAndLog("\nERROR: Credit KeyNbr is invalid\n");
                                        memcpy(CreditKEY, iClass_Key_Table[keyNbr], 8);
                                } else {
                                        PrintAndLog("\nERROR: Credit KeyNbr is invalid\n");


@@ -625,7 +644,7 @@ int CmdHFiClassReader_Dump(const char *Cmd) {
                                errors = param_gethex(tempStr, 0, KEY, dataLen);
                        } else if (dataLen == 1) {
                                keyNbr = param_get8(Cmd, cmdp+1);
                                errors = param_gethex(tempStr, 0, KEY, dataLen);
                        } else if (dataLen == 1) {
                                keyNbr = param_get8(Cmd, cmdp+1);

-                               if (keyNbr <= ICLASS_KEYS_MAX) {
+                               if (keyNbr < ICLASS_KEYS_MAX) {

                                        memcpy(KEY, iClass_Key_Table[keyNbr], 8);
                                } else {
                                        PrintAndLog("\nERROR: Credit KeyNbr is invalid\n");
                                        memcpy(KEY, iClass_Key_Table[keyNbr], 8);
                                } else {
                                        PrintAndLog("\nERROR: Credit KeyNbr is invalid\n");


@@ -771,10 +790,10 @@ int CmdHFiClassReader_Dump(const char *Cmd) {
        if (have_debit_key) memcpy(tag_data+(3*8),div_key,8);
        if (have_credit_key) memcpy(tag_data+(4*8),c_div_key,8);
        // print the dump
        if (have_debit_key) memcpy(tag_data+(3*8),div_key,8);
        if (have_credit_key) memcpy(tag_data+(4*8),c_div_key,8);
        // print the dump

-       printf("CSN   |00| %02X %02X %02X %02X %02X %02X %02X %02X |\n",tag_data[0],tag_data[1],tag_data[2]
-                 ,tag_data[3],tag_data[4],tag_data[5],tag_data[6],tag_data[7]);
-       printIclassDumpContents(tag_data, 1, (gotBytes/8)-1, gotBytes-8);
-
+       printf("------+--+-------------------------+\n");
+       printf("CSN   |00| %s|\n",sprint_hex(tag_data, 8));
+       printIclassDumpContents(tag_data, 1, (gotBytes/8), gotBytes);
+       

        if (filename[0] == 0){
                snprintf(filename, FILE_PATH_SIZE,"iclass_tagdump-%02x%02x%02x%02x%02x%02x%02x%02x",
                    tag_data[0],tag_data[1],tag_data[2],tag_data[3],
        if (filename[0] == 0){
                snprintf(filename, FILE_PATH_SIZE,"iclass_tagdump-%02x%02x%02x%02x%02x%02x%02x%02x",
                    tag_data[0],tag_data[1],tag_data[2],tag_data[3],


@@ -884,7 +903,7 @@ int CmdHFiClass_WriteBlock(const char *Cmd) {
                                errors = param_gethex(tempStr, 0, KEY, dataLen);
                        } else if (dataLen == 1) {
                                keyNbr = param_get8(Cmd, cmdp+1);
                                errors = param_gethex(tempStr, 0, KEY, dataLen);
                        } else if (dataLen == 1) {
                                keyNbr = param_get8(Cmd, cmdp+1);

-                               if (keyNbr <= ICLASS_KEYS_MAX) {
+                               if (keyNbr < ICLASS_KEYS_MAX) {

                                        memcpy(KEY, iClass_Key_Table[keyNbr], 8);
                                } else {
                                        PrintAndLog("\nERROR: Credit KeyNbr is invalid\n");
                                        memcpy(KEY, iClass_Key_Table[keyNbr], 8);
                                } else {
                                        PrintAndLog("\nERROR: Credit KeyNbr is invalid\n");


@@ -933,7 +952,7 @@ int usage_hf_iclass_clone(void) {
 }
 
 int CmdHFiClassCloneTag(const char *Cmd) {
 }
 
 int CmdHFiClassCloneTag(const char *Cmd) {

-       char filename[FILE_PATH_SIZE];
+       char filename[FILE_PATH_SIZE] = {0};

        char tempStr[50]={0};
        uint8_t KEY[8]={0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00};
        uint8_t keyNbr = 0;
        char tempStr[50]={0};
        uint8_t KEY[8]={0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00};
        uint8_t keyNbr = 0;


@@ -987,7 +1006,7 @@ int CmdHFiClassCloneTag(const char *Cmd) {
                                errors = param_gethex(tempStr, 0, KEY, dataLen);
                        } else if (dataLen == 1) {
                                keyNbr = param_get8(Cmd, cmdp+1);
                                errors = param_gethex(tempStr, 0, KEY, dataLen);
                        } else if (dataLen == 1) {
                                keyNbr = param_get8(Cmd, cmdp+1);

-                               if (keyNbr <= ICLASS_KEYS_MAX) {
+                               if (keyNbr < ICLASS_KEYS_MAX) {

                                        memcpy(KEY, iClass_Key_Table[keyNbr], 8);
                                } else {
                                        PrintAndLog("\nERROR: Credit KeyNbr is invalid\n");
                                        memcpy(KEY, iClass_Key_Table[keyNbr], 8);
                                } else {
                                        PrintAndLog("\nERROR: Credit KeyNbr is invalid\n");


@@ -1038,6 +1057,7 @@ int CmdHFiClassCloneTag(const char *Cmd) {
 
        if (startblock<5) {
                PrintAndLog("You cannot write key blocks this way. yet... make your start block > 4");
 
        if (startblock<5) {
                PrintAndLog("You cannot write key blocks this way. yet... make your start block > 4");

+               fclose(f);

                return 0;
        }
        // now read data from the file from block 6 --- 19
                return 0;
        }
        // now read data from the file from block 6 --- 19


@@ -1046,7 +1066,11 @@ int CmdHFiClassCloneTag(const char *Cmd) {
        // else we have to create a share memory
        int i;
        fseek(f,startblock*8,SEEK_SET);
        // else we have to create a share memory
        int i;
        fseek(f,startblock*8,SEEK_SET);

-       fread(tag_data,sizeof(iclass_block_t),endblock - startblock + 1,f);
+       if ( fread(tag_data,sizeof(iclass_block_t),endblock - startblock + 1,f) == 0 ) {
+               PrintAndLog("File reading error.");
+               fclose(f);
+               return 2;
+       }

 
        uint8_t MAC[4]={0x00,0x00,0x00,0x00};
        uint8_t div_key[8]={0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00};
 
        uint8_t MAC[4]={0x00,0x00,0x00,0x00};
        uint8_t div_key[8]={0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00};


@@ -1084,12 +1108,19 @@ int CmdHFiClassCloneTag(const char *Cmd) {
        return 1;
 }
 
        return 1;
 }
 

-static int ReadBlock(uint8_t *KEY, uint8_t blockno, uint8_t keyType, bool elite, bool rawkey, bool verbose) {
+static int ReadBlock(uint8_t *KEY, uint8_t blockno, uint8_t keyType, bool elite, bool rawkey, bool verbose, bool auth) {

        uint8_t MAC[4]={0x00,0x00,0x00,0x00};
        uint8_t div_key[8]={0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00};
 
        uint8_t MAC[4]={0x00,0x00,0x00,0x00};
        uint8_t div_key[8]={0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00};
 

-       if (!select_and_auth(KEY, MAC, div_key, (keyType==0x18), elite, rawkey, verbose))
-               return 0;
+       if (auth) {
+               if (!select_and_auth(KEY, MAC, div_key, (keyType==0x18), elite, rawkey, verbose))
+                       return 0;
+       } else {
+               uint8_t CSN[8]={0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00};
+               uint8_t CCNR[12]={0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00};
+               if (!select_only(CSN, CCNR, (keyType==0x18), verbose))
+                       return 0;
+       }

 
        UsbCommand resp;
        UsbCommand w = {CMD_ICLASS_READBLOCK, {blockno}};
 
        UsbCommand resp;
        UsbCommand w = {CMD_ICLASS_READBLOCK, {blockno}};


@@ -1135,6 +1166,7 @@ int CmdHFiClass_ReadBlock(const char *Cmd) {
        bool elite = false;
        bool rawkey = false;
        bool errors = false;
        bool elite = false;
        bool rawkey = false;
        bool errors = false;

+       bool auth = false;

        uint8_t cmdp = 0;
        while(param_getchar(Cmd, cmdp) != 0x00)
        {
        uint8_t cmdp = 0;
        while(param_getchar(Cmd, cmdp) != 0x00)
        {


@@ -1163,12 +1195,13 @@ int CmdHFiClass_ReadBlock(const char *Cmd) {
                        break;
                case 'k':
                case 'K':
                        break;
                case 'k':
                case 'K':

+                       auth = true;

                        dataLen = param_getstr(Cmd, cmdp+1, tempStr);
                        if (dataLen == 16) { 
                                errors = param_gethex(tempStr, 0, KEY, dataLen);
                        } else if (dataLen == 1) {
                                keyNbr = param_get8(Cmd, cmdp+1);
                        dataLen = param_getstr(Cmd, cmdp+1, tempStr);
                        if (dataLen == 16) { 
                                errors = param_gethex(tempStr, 0, KEY, dataLen);
                        } else if (dataLen == 1) {
                                keyNbr = param_get8(Cmd, cmdp+1);

-                               if (keyNbr <= ICLASS_KEYS_MAX) {
+                               if (keyNbr < ICLASS_KEYS_MAX) {

                                        memcpy(KEY, iClass_Key_Table[keyNbr], 8);
                                } else {
                                        PrintAndLog("\nERROR: Credit KeyNbr is invalid\n");
                                        memcpy(KEY, iClass_Key_Table[keyNbr], 8);
                                } else {
                                        PrintAndLog("\nERROR: Credit KeyNbr is invalid\n");


@@ -1193,9 +1226,10 @@ int CmdHFiClass_ReadBlock(const char *Cmd) {
                if(errors) return usage_hf_iclass_readblock();
        }
 
                if(errors) return usage_hf_iclass_readblock();
        }
 

-       if (cmdp < 4) return usage_hf_iclass_readblock();
-
-       return ReadBlock(KEY, blockno, keyType, elite, rawkey, true);
+       if (cmdp < 2) return usage_hf_iclass_readblock();
+       if (!auth)
+               PrintAndLog("warning: no authentication used with read, only a few specific blocks can be read accurately without authentication.");
+       return ReadBlock(KEY, blockno, keyType, elite, rawkey, true, auth);

 }
 
 int CmdHFiClass_loclass(const char *Cmd) {
 }
 
 int CmdHFiClass_loclass(const char *Cmd) {


@@ -1209,7 +1243,7 @@ int CmdHFiClass_loclass(const char *Cmd) {
                PrintAndLog("f <filename>  Bruteforce iclass dumpfile");
                PrintAndLog("                   An iclass dumpfile is assumed to consist of an arbitrary number of");
                PrintAndLog("                   malicious CSNs, and their protocol responses");
                PrintAndLog("f <filename>  Bruteforce iclass dumpfile");
                PrintAndLog("                   An iclass dumpfile is assumed to consist of an arbitrary number of");
                PrintAndLog("                   malicious CSNs, and their protocol responses");

-               PrintAndLog("                   The the binary format of the file is expected to be as follows: ");
+               PrintAndLog("                   The binary format of the file is expected to be as follows: ");

                PrintAndLog("                   <8 byte CSN><8 byte CC><4 byte NR><4 byte MAC>");
                PrintAndLog("                   <8 byte CSN><8 byte CC><4 byte NR><4 byte MAC>");
                PrintAndLog("                   <8 byte CSN><8 byte CC><4 byte NR><4 byte MAC>");
                PrintAndLog("                   <8 byte CSN><8 byte CC><4 byte NR><4 byte MAC>");
                PrintAndLog("                   <8 byte CSN><8 byte CC><4 byte NR><4 byte MAC>");
                PrintAndLog("                   <8 byte CSN><8 byte CC><4 byte NR><4 byte MAC>");


@@ -1244,7 +1278,6 @@ int CmdHFiClass_loclass(const char *Cmd) {
 }
 
 void printIclassDumpContents(uint8_t *iclass_dump, uint8_t startblock, uint8_t endblock, size_t filesize) {
 }
 
 void printIclassDumpContents(uint8_t *iclass_dump, uint8_t startblock, uint8_t endblock, size_t filesize) {

-       uint8_t blockdata[8];

        uint8_t mem_config;
        memcpy(&mem_config, iclass_dump + 13,1);
        uint8_t maxmemcount;
        uint8_t mem_config;
        memcpy(&mem_config, iclass_dump + 13,1);
        uint8_t maxmemcount;


@@ -1259,18 +1292,19 @@ void printIclassDumpContents(uint8_t *iclass_dump, uint8_t startblock, uint8_t e
                startblock = 6;
        if ((endblock > maxmemcount) || (endblock == 0))
                endblock = maxmemcount;
                startblock = 6;
        if ((endblock > maxmemcount) || (endblock == 0))
                endblock = maxmemcount;

-       if (endblock > filemaxblock)
+
+       // remember endblock need to relate to zero-index arrays.
+       if (endblock > filemaxblock-1)

                endblock = filemaxblock;
                endblock = filemaxblock;

+       

        int i = startblock;
        int i = startblock;

-       int j;
-       while (i <= endblock){
-               printf("Block |%02X| ",i);
-               memcpy(blockdata,iclass_dump + (i * 8),8);
-               for (j = 0;j < 8;j++)
-                       printf("%02X ",blockdata[j]);
-               printf("|\n");
+       printf("------+--+-------------------------+\n");
+       while (i <= endblock) {
+               uint8_t *blk = iclass_dump + (i * 8);
+               printf("Block |%02X| %s|\n", i, sprint_hex(blk, 8) );   

                i++;
        }
                i++;
        }

+       printf("------+--+-------------------------+\n");

 }
 
 int usage_hf_iclass_readtagfile() {
 }
 
 int usage_hf_iclass_readtagfile() {


@@ -1305,13 +1339,19 @@ int CmdHFiClassReadTagFile(const char *Cmd) {
        long fsize = ftell(f);
        fseek(f, 0, SEEK_SET);
 
        long fsize = ftell(f);
        fseek(f, 0, SEEK_SET);
 

-       uint8_t *dump = malloc(fsize);
+       if ( fsize < 0 ) {
+               PrintAndLog("Error, when getting filesize");
+               fclose(f);
+               return 1;
+       }

 
 

+       uint8_t *dump = malloc(fsize);

 
        size_t bytes_read = fread(dump, 1, fsize, f);
        fclose(f);
        uint8_t *csn = dump;
 
        size_t bytes_read = fread(dump, 1, fsize, f);
        fclose(f);
        uint8_t *csn = dump;

-       printf("CSN   [00] | %02X %02X %02X %02X %02X %02X %02X %02X |\n",csn[0],csn[1],csn[2],csn[3],csn[4],csn[5],csn[6],csn[7]);
+       printf("------+--+-------------------------+\n");
+       printf("CSN   |00| %s|\n", sprint_hex(csn, 8) );

        //    printIclassDumpInfo(dump);
        printIclassDumpContents(dump,startblock,endblock,bytes_read);
        free(dump);
        //    printIclassDumpInfo(dump);
        printIclassDumpContents(dump,startblock,endblock,bytes_read);
        free(dump);


@@ -1332,7 +1372,7 @@ uint64_t hexarray_to_uint64(uint8_t *key) {
        for (int i = 0;i < 8;i++)
                sprintf(&temp[(i *2)],"%02X",key[i]);
        temp[16] = '\0';
        for (int i = 0;i < 8;i++)
                sprintf(&temp[(i *2)],"%02X",key[i]);
        temp[16] = '\0';

-       if (sscanf(temp,"%016"llX,&uint_key) < 1)
+       if (sscanf(temp,"%016" SCNx64,&uint_key) < 1)

                return 0;
        return uint_key;
 }
                return 0;
        return uint_key;
 }


@@ -1431,7 +1471,7 @@ int CmdHFiClassCalcNewKey(const char *Cmd) {
                                errors = param_gethex(tempStr, 0, NEWKEY, dataLen);
                        } else if (dataLen == 1) {
                                keyNbr = param_get8(Cmd, cmdp+1);
                                errors = param_gethex(tempStr, 0, NEWKEY, dataLen);
                        } else if (dataLen == 1) {
                                keyNbr = param_get8(Cmd, cmdp+1);

-                               if (keyNbr <= ICLASS_KEYS_MAX) {
+                               if (keyNbr < ICLASS_KEYS_MAX) {

                                        memcpy(NEWKEY, iClass_Key_Table[keyNbr], 8);
                                } else {
                                        PrintAndLog("\nERROR: NewKey Nbr is invalid\n");
                                        memcpy(NEWKEY, iClass_Key_Table[keyNbr], 8);
                                } else {
                                        PrintAndLog("\nERROR: NewKey Nbr is invalid\n");


@@ -1450,7 +1490,7 @@ int CmdHFiClassCalcNewKey(const char *Cmd) {
                                errors = param_gethex(tempStr, 0, OLDKEY, dataLen);
                        } else if (dataLen == 1) {
                                keyNbr = param_get8(Cmd, cmdp+1);
                                errors = param_gethex(tempStr, 0, OLDKEY, dataLen);
                        } else if (dataLen == 1) {
                                keyNbr = param_get8(Cmd, cmdp+1);

-                               if (keyNbr <= ICLASS_KEYS_MAX) {
+                               if (keyNbr < ICLASS_KEYS_MAX) {

                                        memcpy(OLDKEY, iClass_Key_Table[keyNbr], 8);
                                } else {
                                        PrintAndLog("\nERROR: Credit KeyNbr is invalid\n");
                                        memcpy(OLDKEY, iClass_Key_Table[keyNbr], 8);
                                } else {
                                        PrintAndLog("\nERROR: Credit KeyNbr is invalid\n");


@@ -1498,6 +1538,12 @@ static int loadKeys(char *filename) {
        long fsize = ftell(f);
        fseek(f, 0, SEEK_SET);
 
        long fsize = ftell(f);
        fseek(f, 0, SEEK_SET);
 

+       if ( fsize < 0 ) {
+               PrintAndLog("Error, when getting filesize");
+               fclose(f);
+               return 1;
+       }
+

        uint8_t *dump = malloc(fsize);
 
        size_t bytes_read = fread(dump, 1, fsize, f);
        uint8_t *dump = malloc(fsize);
 
        size_t bytes_read = fread(dump, 1, fsize, f);


@@ -1590,8 +1636,8 @@ int CmdHFiClassManageKeys(const char *Cmd) {
                case 'n':
                case 'N':
                        keyNbr = param_get8(Cmd, cmdp+1);
                case 'n':
                case 'N':
                        keyNbr = param_get8(Cmd, cmdp+1);

-                       if (keyNbr < 0) {
-                               PrintAndLog("Wrong block number");
+                       if (keyNbr >= ICLASS_KEYS_MAX) {
+                               PrintAndLog("Invalid block number");

                                errors = true;
                        }
                        cmdp += 2;
                                errors = true;
                        }
                        cmdp += 2;


@@ -1666,7 +1712,7 @@ static command_t CommandTable[] =
        {"loclass",     CmdHFiClass_loclass,            1,      "[options..] Use loclass to perform bruteforce of reader attack dump"},
        {"managekeys",  CmdHFiClassManageKeys,          1,      "[options..] Manage the keys to use with iClass"},
        {"readblk",     CmdHFiClass_ReadBlock,          0,      "[options..] Authenticate and Read iClass block"},
        {"loclass",     CmdHFiClass_loclass,            1,      "[options..] Use loclass to perform bruteforce of reader attack dump"},
        {"managekeys",  CmdHFiClassManageKeys,          1,      "[options..] Manage the keys to use with iClass"},
        {"readblk",     CmdHFiClass_ReadBlock,          0,      "[options..] Authenticate and Read iClass block"},

-       {"reader",      CmdHFiClassReader,              0,      "            Read an iClass tag"},
+       {"reader",      CmdHFiClassReader,              0,      "            Look for iClass tags until a key or the pm3 button is pressed"},

        {"readtagfile", CmdHFiClassReadTagFile,         1,      "[options..] Display Content from tagfile"},
        {"replay",      CmdHFiClassReader_Replay,       0,      "<mac>       Read an iClass tag via Reply Attack"},
        {"sim",         CmdHFiClassSim,                 0,      "[options..] Simulate iClass tag"},
        {"readtagfile", CmdHFiClassReadTagFile,         1,      "[options..] Display Content from tagfile"},
        {"replay",      CmdHFiClassReader_Replay,       0,      "<mac>       Read an iClass tag via Reply Attack"},
        {"sim",         CmdHFiClassSim,                 0,      "[options..] Simulate iClass tag"},