X-Git-Url: http://git.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/blobdiff_plain/aabb719dc4e9af383e20c79647612755957bca00..1477ba8a3c34f9b7eb624167251efea927755194:/armsrc/BigBuf.c diff --git a/armsrc/BigBuf.c b/armsrc/BigBuf.c index 18db66f3..ce97e41f 100644 --- a/armsrc/BigBuf.c +++ b/armsrc/BigBuf.c @@ -13,10 +13,19 @@ #include "proxmark3.h" #include "apps.h" #include "string.h" +#include "util.h" // BigBuf is the large multi-purpose buffer, typically used to hold A/D samples or traces. // Also used to hold various smaller buffers and the Mifare Emulator Memory. +/* BigBuf memory layout: +Pointer to highest available memory: BigBuf_hi + + high BIGBUF_SIZE + reserved = BigBuf_malloc() subtracts amount from BigBuf_hi, + low 0x00 +*/ + // declare it as uint32_t to achieve alignment to 4 Byte boundary static uint32_t BigBuf[BIGBUF_SIZE/sizeof(uint32_t)]; @@ -27,8 +36,9 @@ static uint16_t BigBuf_hi = BIGBUF_SIZE; static uint8_t *emulator_memory = NULL; // trace related variables -static uint16_t traceLen = 0; -int tracing = 1; //Last global one.. todo static? +static uint32_t traceLen = 0; +static bool tracing = true; + // get the address of BigBuf uint8_t *BigBuf_get_addr(void) @@ -40,10 +50,11 @@ uint8_t *BigBuf_get_addr(void) // get the address of the emulator memory. Allocate part of Bigbuf for it, if not yet done uint8_t *BigBuf_get_EM_addr(void) { - if (emulator_memory == NULL) { // not yet allocated + // not yet allocated + if (emulator_memory == NULL) { emulator_memory = BigBuf_malloc(CARD_MEMORY_SIZE); } - + return emulator_memory; } @@ -51,20 +62,38 @@ uint8_t *BigBuf_get_EM_addr(void) // clear ALL of BigBuf void BigBuf_Clear(void) { - memset(BigBuf,0,BIGBUF_SIZE); - Dbprintf("Buffer cleared (%i bytes)",BIGBUF_SIZE); + BigBuf_Clear_ext(true); } +// clear ALL of BigBuf +void BigBuf_Clear_ext(bool verbose) +{ + memset(BigBuf, 0, BIGBUF_SIZE); + if (verbose) + Dbprintf("Buffer cleared (%i bytes)", BIGBUF_SIZE); +} + + +void BigBuf_Clear_EM(void){ + memset(BigBuf_get_EM_addr(), 0, CARD_MEMORY_SIZE); +} + + +void BigBuf_Clear_keep_EM(void) +{ + memset(BigBuf, 0, BigBuf_hi); +} + // allocate a chunk of memory from BigBuf. We allocate high memory first. The unallocated memory // at the beginning of BigBuf is always for traces/samples uint8_t *BigBuf_malloc(uint16_t chunksize) { - if (BigBuf_hi - chunksize < 0) { - return NULL; // no memory left + if (BigBuf_hi - chunksize < 0) { + return NULL; // no memory left } else { - chunksize = (chunksize + 3) & 0xfffc; // round to next multiple of 4 - BigBuf_hi -= chunksize; // aligned to 4 Byte boundary + chunksize = (chunksize + 3) & 0xfffc; // round to next multiple of 4 + BigBuf_hi -= chunksize; // aligned to 4 Byte boundary return (uint8_t *)BigBuf + BigBuf_hi; } } @@ -88,6 +117,16 @@ void BigBuf_free_keep_EM(void) } } +void BigBuf_print_status(void) +{ + Dbprintf("Memory"); + Dbprintf(" BIGBUF_SIZE.............%d", BIGBUF_SIZE); + Dbprintf(" Available memory........%d", BigBuf_hi); + Dbprintf("Tracing"); + Dbprintf(" tracing ................%d", tracing); + Dbprintf(" traceLen ...............%d", traceLen); +} + // return the maximum trace length (i.e. the unallocated size of BigBuf) uint16_t BigBuf_max_traceLen(void) @@ -95,17 +134,22 @@ uint16_t BigBuf_max_traceLen(void) return BigBuf_hi; } + void clear_trace() { - uint8_t *trace = BigBuf_get_addr(); - uint16_t max_traceLen = BigBuf_max_traceLen(); - memset(trace, 0x44, max_traceLen); traceLen = 0; } + void set_tracing(bool enable) { tracing = enable; } + +bool get_tracing(void) { + return tracing; +} + + /** * Get the number of bytes traced * @return @@ -115,6 +159,7 @@ uint16_t BigBuf_get_traceLen(void) return traceLen; } + /** This is a function to store traces. All protocols can use this generic tracer-function. The traces produced by calling this function can be fetched on the client-side @@ -124,19 +169,19 @@ uint16_t BigBuf_get_traceLen(void) **/ bool RAMFUNC LogTrace(const uint8_t *btBytes, uint16_t iLen, uint32_t timestamp_start, uint32_t timestamp_end, uint8_t *parity, bool readerToTag) { - if (!tracing) return FALSE; + if (!tracing) return false; uint8_t *trace = BigBuf_get_addr(); - uint16_t num_paritybytes = (iLen-1)/8 + 1; // number of valid paritybytes in *parity - uint16_t duration = timestamp_end - timestamp_start; + uint32_t num_paritybytes = (iLen-1)/8 + 1; // number of valid paritybytes in *parity + uint32_t duration = timestamp_end - timestamp_start; // Return when trace is full uint16_t max_traceLen = BigBuf_max_traceLen(); if (traceLen + sizeof(iLen) + sizeof(timestamp_start) + sizeof(duration) + num_paritybytes + iLen >= max_traceLen) { - tracing = FALSE; // don't trace any more - return FALSE; + tracing = false; // don't trace any more + return false; } // Traceformat: // 32 bits timestamp (little endian) @@ -166,46 +211,85 @@ bool RAMFUNC LogTrace(const uint8_t *btBytes, uint16_t iLen, uint32_t timestamp_ // data bytes if (btBytes != NULL && iLen != 0) { - memcpy(trace + traceLen, btBytes, iLen); + for (int i = 0; i < iLen; i++) { + trace[traceLen++] = *btBytes++; + } } - traceLen += iLen; // parity bytes - if (parity != NULL && iLen != 0) { - memcpy(trace + traceLen, parity, num_paritybytes); - } - traceLen += num_paritybytes; - - if(traceLen +4 < max_traceLen) - { //If it hadn't been cleared, for whatever reason.. - memset(trace+traceLen,0x44, 4); + if (num_paritybytes != 0) { + if (parity != NULL) { + for (int i = 0; i < num_paritybytes; i++) { + trace[traceLen++] = *parity++; + } + } else { + for (int i = 0; i < num_paritybytes; i++) { + trace[traceLen++] = 0x00; + } + } } - return TRUE; + return true; } -int LogTraceHitag(const uint8_t * btBytes, int iBits, int iSamples, uint32_t dwParity, int bReader) + + +int LogTraceHitag(const uint8_t * btBytes, int iBits, int iSamples, uint32_t dwParity, int readerToTag) { - static uint16_t traceLen = 0; + /** + Todo, rewrite the logger to use the generic functionality instead. It should be noted, however, + that this logger takes number of bits as argument, not number of bytes. + **/ + + if (!tracing) return false; + uint8_t *trace = BigBuf_get_addr(); + uint16_t iLen = nbytes(iBits); // Return when trace is full - if (traceLen + sizeof(rsamples) + sizeof(dwParity) + sizeof(iBits) + nbytes(iBits) > BigBuf_max_traceLen()) return FALSE; + if (traceLen + sizeof(rsamples) + sizeof(dwParity) + sizeof(iBits) + iLen > BigBuf_max_traceLen()) { + return false; + } + + //Hitag traces appear to use this traceformat: + // 32 bits timestamp (little endian,Highest Bit used as readerToTag flag) + // 32 bits parity + // 8 bits size (number of bits in the trace entry, not number of bytes) + // y Bytes data + + - // Trace the random, i'm curious rsamples += iSamples; trace[traceLen++] = ((rsamples >> 0) & 0xff); trace[traceLen++] = ((rsamples >> 8) & 0xff); trace[traceLen++] = ((rsamples >> 16) & 0xff); trace[traceLen++] = ((rsamples >> 24) & 0xff); - if (!bReader) { - trace[traceLen - 1] |= 0x80; + + if (!readerToTag) { + trace[traceLen - 1] |= 0x80; } + trace[traceLen++] = ((dwParity >> 0) & 0xff); trace[traceLen++] = ((dwParity >> 8) & 0xff); trace[traceLen++] = ((dwParity >> 16) & 0xff); trace[traceLen++] = ((dwParity >> 24) & 0xff); trace[traceLen++] = iBits; - memcpy(trace + traceLen, btBytes, nbytes(iBits)); - traceLen += nbytes(iBits); - return TRUE; + + for (int i = 0; i < iLen; i++) { + trace[traceLen++] = *btBytes++; + } + + return true; +} + + +// Emulator memory +uint8_t emlSet(uint8_t *data, uint32_t offset, uint32_t length){ + uint8_t* mem = BigBuf_get_EM_addr(); + if (offset+length < CARD_MEMORY_SIZE) { + memcpy(mem+offset, data, length); + return 0; + } else { + Dbprintf("Error, trying to set memory outside of bounds! %d > %d", (offset+length), CARD_MEMORY_SIZE); + return 1; + } }