CHG: Some testing of timings on 14443b,

[proxmark3-svn] / client / cmdanalyse.c

diff --git a/client/cmdanalyse.c b/client/cmdanalyse.c
index ff6c0d4e03c0ac7c88ea2dae19e728ef009ebc95..f2efd3a64a14db905c3d4c2a69be1b898ee4d078 100644 (file)
--- a/client/cmdanalyse.c
+++ b/client/cmdanalyse.c
@@ -25,13 +25,105 @@ int usage_analyse_lcr(void) {
        PrintAndLog("expected output: Target (BA) requires final LRC XOR byte value: 5A");
        return 0;
 }
        PrintAndLog("expected output: Target (BA) requires final LRC XOR byte value: 5A");
        return 0;
 }

+
+int usage_analyse_checksum(void) {
+       PrintAndLog("The bytes will be added with eachother and than limited with the applied mask");
+       PrintAndLog("Finally compute ones' complement of the least significant bytes");
+       PrintAndLog("");
+       PrintAndLog("Usage:  analyse chksum [h] b <bytes> m <mask>");
+       PrintAndLog("Options:");
+       PrintAndLog("           h          This help");
+       PrintAndLog("           b <bytes>  bytes to calc missing XOR in a LCR");
+       PrintAndLog("           m <mask>   bit mask to limit the outpuyt");
+       PrintAndLog("");
+       PrintAndLog("Samples:");
+       PrintAndLog("           analyse chksum b 137AF00A0A0D m FF");
+       PrintAndLog("expected output: 0x61");
+       return 0;
+}
+
+int usage_analyse_crc(void){
+       PrintAndLog("A stub method to test different crc implementations inside the PM3 sourcecode. Just because you figured out the poly, doesn't mean you get the desired output");
+       PrintAndLog("");
+       PrintAndLog("Usage:  analyse crc [h] <bytes>");
+       PrintAndLog("Options:");
+       PrintAndLog("           h          This help");
+       PrintAndLog("           <bytes>    bytes to calc crc");
+       PrintAndLog("");
+       PrintAndLog("Samples:");
+       PrintAndLog("           analyse crc 137AF00A0A0D");
+       return 0;
+}
+

 static uint8_t calculateLRC( uint8_t* bytes, uint8_t len) {
     uint8_t LRC = 0;
     for (uint8_t i = 0; i < len; i++)
         LRC ^= bytes[i];
     return LRC;
 }
 static uint8_t calculateLRC( uint8_t* bytes, uint8_t len) {
     uint8_t LRC = 0;
     for (uint8_t i = 0; i < len; i++)
         LRC ^= bytes[i];
     return LRC;
 }

-       
+
+static uint8_t calcSumCrumbAdd( uint8_t* bytes, uint8_t len, uint32_t mask) {
+    uint8_t sum = 0;
+    for (uint8_t i = 0; i < len; i++) {
+        sum += CRUMB(bytes[i], 0);
+               sum += CRUMB(bytes[i], 2);
+               sum += CRUMB(bytes[i], 4);
+               sum += CRUMB(bytes[i], 6);
+       }
+       sum &= mask;    
+    return sum;
+}
+static uint8_t calcSumCrumbAddOnes( uint8_t* bytes, uint8_t len, uint32_t mask) {
+       return ~calcSumCrumbAdd(bytes, len, mask);
+}
+static uint8_t calcSumNibbleAdd( uint8_t* bytes, uint8_t len, uint32_t mask) {
+    uint8_t sum = 0;
+    for (uint8_t i = 0; i < len; i++) {
+        sum += NIBBLE_LOW(bytes[i]);
+               sum += NIBBLE_HIGH(bytes[i]);
+       }
+       sum &= mask;    
+    return sum;
+}
+static uint8_t calcSumNibbleAddOnes( uint8_t* bytes, uint8_t len, uint32_t mask){
+       return ~calcSumNibbleAdd(bytes, len, mask);
+}
+
+static uint8_t calcSumByteAdd( uint8_t* bytes, uint8_t len, uint32_t mask) {
+    uint8_t sum = 0;
+    for (uint8_t i = 0; i < len; i++)
+        sum += bytes[i];
+       sum &= mask;    
+    return sum;
+}
+// Ones complement
+static uint8_t calcSumByteAddOnes( uint8_t* bytes, uint8_t len, uint32_t mask) {
+       return ~calcSumByteAdd(bytes, len, mask);
+}
+
+static uint8_t calcSumByteSub( uint8_t* bytes, uint8_t len, uint32_t mask) {
+    uint8_t sum = 0;
+    for (uint8_t i = 0; i < len; i++)
+        sum -= bytes[i];
+       sum &= mask;    
+    return sum;
+}
+static uint8_t calcSumByteSubOnes( uint8_t* bytes, uint8_t len, uint32_t mask){
+       return ~calcSumByteSub(bytes, len, mask);
+}
+static uint8_t calcSumNibbleSub( uint8_t* bytes, uint8_t len, uint32_t mask) {
+    uint8_t sum = 0;
+    for (uint8_t i = 0; i < len; i++) {
+        sum -= NIBBLE_LOW(bytes[i]);
+               sum -= NIBBLE_HIGH(bytes[i]);
+       }
+       sum &= mask;    
+    return sum;
+}
+static uint8_t calcSumNibbleSubOnes( uint8_t* bytes, uint8_t len, uint32_t mask) {
+       return ~calcSumNibbleSub(bytes, len, mask);
+}
+

 int CmdAnalyseLCR(const char *Cmd) {
        uint8_t data[50];
        char cmdp = param_getchar(Cmd, 0);
 int CmdAnalyseLCR(const char *Cmd) {
        uint8_t data[50];
        char cmdp = param_getchar(Cmd, 0);


@@ -45,17 +137,116 @@ int CmdAnalyseLCR(const char *Cmd) {
        PrintAndLog("Target [%02X] requires final LRC XOR byte value: 0x%02X",data[len-1] ,finalXor);
        return 0;
 }
        PrintAndLog("Target [%02X] requires final LRC XOR byte value: 0x%02X",data[len-1] ,finalXor);
        return 0;
 }

+int CmdAnalyseCRC(const char *Cmd) {
+
+       char cmdp = param_getchar(Cmd, 0);
+       if (strlen(Cmd) == 0 || cmdp == 'h' || cmdp == 'H') return usage_analyse_crc();
+       
+       int len = strlen(Cmd);
+       if ( len & 1 ) return usage_analyse_crc();
+       
+       // add 1 for null terminator.
+       uint8_t *data = malloc(len+1);
+       if ( data == NULL ) return 1;
+
+       if ( param_gethex(Cmd, 0, data, len)) {
+               free(data);
+               return usage_analyse_crc();
+       }
+       len >>= 1;      
+
+       //PrintAndLog("\nTests with '%s' hex bytes", sprint_hex(data, len));
+       
+       PrintAndLog("\nTests of reflection. Two current methods in source code");       
+       PrintAndLog("   reflect(0x3e23L,3) is %04X == 0x3e26", reflect(0x3e23L,3) );
+       PrintAndLog("  SwapBits(0x3e23L,3) is %04X == 0x3e26", SwapBits(0x3e23L,3) );
+       PrintAndLog("  0xB400 == %04X", reflect( (1 << 16 | 0xb400),16) );
+
+       //
+       // Test of CRC16,  '123456789' string.
+       //
+       PrintAndLog("\nTests with '123456789' string");
+       uint8_t dataStr[] = { 0x31,0x32,0x33,0x34,0x35,0x36,0x37,0x38,0x39 };
+       uint8_t legic8 = CRC8Legic(dataStr, sizeof(dataStr));
+       
+       PrintAndLog("LEGIC: CRC16: %X", CRC16Legic(dataStr, sizeof(dataStr), legic8));
+
+       //these below has been tested OK.
+       PrintAndLog("Confirmed CRC Implementations");
+       PrintAndLog("LEGIC: CRC8 : %X (0xC6 expected)", legic8);
+       PrintAndLog("MAXIM: CRC8 : %X (0xA1 expected)", CRC8Maxim(dataStr, sizeof(dataStr)));
+       PrintAndLog("DNP  : CRC16: %X (0x82EA expected)", CRC16_DNP(dataStr, sizeof(dataStr))); 
+       PrintAndLog("CCITT: CRC16: %X (0xE5CC expected)", CRC16_CCITT(dataStr, sizeof(dataStr)));       
+
+       free(data);
+       return 0;
+}
+int CmdAnalyseCHKSUM(const char *Cmd){
+       
+       uint8_t data[50];
+       uint8_t cmdp = 0;
+       uint32_t mask = 0xFF;
+       bool errors = false;
+       int len = 0;
+       memset(data, 0x0, sizeof(data));
+       
+       while(param_getchar(Cmd, cmdp) != 0x00) {
+               switch(param_getchar(Cmd, cmdp)) {
+               case 'b':
+               case 'B':
+                       param_gethex_ex(Cmd, cmdp+1, data, &len);
+                       if ( len%2 ) errors = true;
+                       len >>= 1;      
+                       cmdp += 2;
+                       break;
+               case 'm':
+               case 'M':                
+                       mask = param_get32ex(Cmd, cmdp+1, 0, 16);
+                       cmdp += 2;
+                       break;
+               case 'h':
+               case 'H':
+                       return usage_analyse_checksum();
+               default:
+                       PrintAndLog("Unknown parameter '%c'", param_getchar(Cmd, cmdp));
+                       errors = true;
+                       break;
+               }
+               if(errors) break;
+       }
+       //Validations
+       if(errors) return usage_analyse_checksum();
+       
+       PrintAndLog("\nByte Add        | 0x%X", calcSumByteAdd(data, len, mask));
+       PrintAndLog("Nibble Add      | 0x%X", calcSumNibbleAdd(data, len, mask));
+       PrintAndLog("Crumb Add       | 0x%X", calcSumCrumbAdd(data, len, mask));
+       
+       PrintAndLog("\nByte Subtract   | 0x%X", calcSumByteSub(data, len, mask));
+       PrintAndLog("Nibble Subtract | 0x%X", calcSumNibbleSub(data, len, mask));
+       
+       PrintAndLog("\nCHECKSUM - One's complement");
+       PrintAndLog("Byte Add        | 0x%X", calcSumByteAddOnes(data, len, mask));
+       PrintAndLog("Nibble Add      | 0x%X", calcSumNibbleAddOnes(data, len, mask));
+       PrintAndLog("Crumb Add       | 0x%X", calcSumCrumbAddOnes(data, len, mask));
+
+       PrintAndLog("Byte Subtract   | 0x%X", calcSumByteSubOnes(data, len, mask));
+       PrintAndLog("Nibble Subtract | 0x%X", calcSumNibbleSubOnes(data, len, mask));
+       
+       return 0;
+}

 
 int CmdAnalyseDates(const char *Cmd){
        // look for datestamps in a given array of bytes
 
 int CmdAnalyseDates(const char *Cmd){
        // look for datestamps in a given array of bytes

-       PrintAndLog("To be implemented.  If you feel to contribute!");
+       PrintAndLog("To be implemented. Feel free to contribute!");

        return 0;
 }
 
 static command_t CommandTable[] = {
        {"help",        CmdHelp,            1, "This help"},
        return 0;
 }
 
 static command_t CommandTable[] = {
        {"help",        CmdHelp,            1, "This help"},

-       {"lcr",         CmdAnalyseLCR,          0, "Generate final byte for XOR LRC"},
-       {"dates",       CmdAnalyseDates,        0, "Look for datestamps in a given array of bytes"},
+       {"lcr",         CmdAnalyseLCR,          1, "Generate final byte for XOR LRC"},
+       {"crc",         CmdAnalyseCRC,          1, "Stub method for CRC evaluations"},
+       {"chksum",      CmdAnalyseCHKSUM,       1, "Checksum with adding, masking and one's complement"},
+       {"dates",       CmdAnalyseDates,        1, "Look for datestamps in a given array of bytes"},

        {NULL, NULL, 0, NULL}
 };
 
        {NULL, NULL, 0, NULL}
 };