From e46fe044301490953e98776b70e0acd1117e2b20 Mon Sep 17 00:00:00 2001 From: Craig Young Date: Mon, 13 Jul 2015 18:46:42 -0400 Subject: [PATCH] Introducing a stand-alone mode for working with NFC (ISO14443a) tag UIDs. --- CHANGELOG.md | 3 + armsrc/Makefile | 2 +- armsrc/appmain.c | 226 +++++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 230 insertions(+), 1 deletion(-) diff --git a/CHANGELOG.md b/CHANGELOG.md index edf0a310..dc015c92 100644 --- a/CHANGELOG.md +++ b/CHANGELOG.md @@ -4,6 +4,9 @@ This project uses the changelog in accordance with [keepchangelog](http://keepac ## [unreleased][unreleased] +### Added +- ISO14443a stand-alone operation with ARM CFLAG="WITH_ISO14443a_StandAlone". This code can read & emulate two banks of 14a tag UIDs and write to "magic" cards (Craig Young) + ### Added - AWID26 command context added as 'lf awid' containing realtime demodulation as well as cloning/simulation based on tag numbers (Craig Young) diff --git a/armsrc/Makefile b/armsrc/Makefile index 141cf0ec..a59fa073 100644 --- a/armsrc/Makefile +++ b/armsrc/Makefile @@ -10,7 +10,7 @@ APP_INCLUDES = apps.h #remove one of the following defines and comment out the relevant line #in the next section to remove that particular feature from compilation -APP_CFLAGS = -DWITH_LF -DWITH_ISO15693 -DWITH_ISO14443a -DWITH_ISO14443b -DWITH_ICLASS -DWITH_LEGICRF -DWITH_HITAG -DWITH_CRC -DON_DEVICE \ +APP_CFLAGS = -DWITH_ISO14443a_StandAlone -DWITH_LF -DWITH_ISO15693 -DWITH_ISO14443a -DWITH_ISO14443b -DWITH_ICLASS -DWITH_LEGICRF -DWITH_HITAG -DWITH_CRC -DON_DEVICE \ -fno-strict-aliasing -ffunction-sections -fdata-sections #-DWITH_LCD diff --git a/armsrc/appmain.c b/armsrc/appmain.c index 37899f57..40df5f5f 100644 --- a/armsrc/appmain.c +++ b/armsrc/appmain.c @@ -29,6 +29,11 @@ #include "LCD.h" #endif +// Craig Young - 14a stand-alone code +#ifdef WITH_ISO14443a_StandAlone + #include "iso14443a.h" +#endif + #define abs(x) ( ((x)<0) ? -(x) : (x) ) //============================================================================= @@ -294,6 +299,7 @@ void SendVersion(void) } #ifdef WITH_LF +#ifndef WITH_ISO14443a_StandAlone // samy's sniff and repeat routine void SamyRun() { @@ -440,7 +446,219 @@ void SamyRun() } } #endif +#endif +#ifdef WITH_ISO14443a +#ifdef WITH_ISO14443a_StandAlone +void StandAloneMode14a() +{ + DbpString("Stand-alone mode! No PC necessary."); + FpgaDownloadAndGo(FPGA_BITSTREAM_HF); + + // 3 possible options? no just 1 for now +#undef OPTS +#define OPTS 2 + // Oooh pretty -- notify user we're in elite samy mode now + LED(LED_RED, 200); + LED(LED_ORANGE, 200); + LED(LED_GREEN, 200); + LED(LED_ORANGE, 200); + LED(LED_RED, 200); + LED(LED_ORANGE, 200); + LED(LED_GREEN, 200); + LED(LED_ORANGE, 200); + LED(LED_RED, 200); + + int selected = 0; + int playing = 0; + int cardRead[OPTS] = {0}; + uint8_t readUID[10] = {0}; + int uid_1st[OPTS]={0}; + int uid_2nd[OPTS]={0}; + + LED(selected + 1, 0); + + for (;;) + { + usb_poll(); + WDT_HIT(); + + // Was our button held down or pressed? + int button_pressed = BUTTON_HELD(1000); + + SpinDelay(300); + + // Button was held for a second, begin recording + if (button_pressed > 0 && cardRead[selected] == 0) + { + LEDsoff(); + LED(selected + 1, 0); + LED(LED_RED2, 0); + + // record + Dbprintf("Enabling iso14443a reader mode for [Bank: %u]...", selected); + + // wait for button to be released + while(BUTTON_PRESS()) + WDT_HIT(); + /* need this delay to prevent catching some weird data */ + SpinDelay(500); + /* Code for reading from 14a tag */ + uint8_t uid[10] ={0}; + uint32_t cuid; + iso14443a_setup(FPGA_HF_ISO14443A_READER_MOD); + + for ( ; ; ) + { + if (!iso14443a_select_card(uid, NULL, &cuid)) + continue; + else + { + Dbprintf("Read UID:"); Dbhexdump(10,uid,0); + memcpy(readUID,uid,10*sizeof(uint8_t)); + uint8_t *dst = (uint8_t *)&uid_1st[selected]; + // Set UID byte order + for (int i=0; i<4; i++) + dst[i] = uid[3-i]; + dst = (uint8_t *)&uid_2nd[selected]; + for (int i=0; i<4; i++) + dst[i] = uid[7-i]; + break; + } + } + LEDsoff(); + LED(LED_GREEN, 200); + LED(LED_ORANGE, 200); + LED(LED_GREEN, 200); + LED(LED_ORANGE, 200); + + LEDsoff(); + LED(selected + 1, 0); + // Finished recording + + // If we were previously playing, set playing off + // so next button push begins playing what we recorded + playing = 0; + + cardRead[selected] = 1; + + } +/* MF UID clone */ + else if (button_pressed > 0 && cardRead[selected] == 1) + { + LEDsoff(); + LED(selected + 1, 0); + LED(LED_ORANGE, 250); + + // record + Dbprintf("Preparing to Clone card [Bank: %x]; uid: %08x", selected, uid_1st[selected]); + + // wait for button to be released + while(BUTTON_PRESS()) + { + // Delay cloning until card is in place + WDT_HIT(); + } + Dbprintf("Starting clone. [Bank: %u]", selected); + // need this delay to prevent catching some weird data + SpinDelay(500); + // Begin clone function here: + /* Example from client/mifarehost.c for commanding a block write for "magic Chinese" cards: + UsbCommand c = {CMD_MIFARE_CSETBLOCK, {wantWipe, params & (0xFE | (uid == NULL ? 0:1)), blockNo}}; + memcpy(c.d.asBytes, data, 16); + SendCommand(&c); + + Block read is similar: + UsbCommand c = {CMD_MIFARE_CGETBLOCK, {params, 0, blockNo}}; + We need to imitate that call with blockNo 0 to set a uid. + + The get and set commands are handled in this file: + // Work with "magic Chinese" card + case CMD_MIFARE_CSETBLOCK: + MifareCSetBlock(c->arg[0], c->arg[1], c->arg[2], c->d.asBytes); + break; + case CMD_MIFARE_CGETBLOCK: + MifareCGetBlock(c->arg[0], c->arg[1], c->arg[2], c->d.asBytes); + // + break; + + mfCSetUID provides example logic for UID set workflow: + -Read block0 from card in field with MifareCGetBlock() + -Configure new values without replacing reserved bytes + memcpy(block0, uid, 4); // Copy UID bytes from byte array + // Mifare UID BCC + block0[4] = block0[0]^block0[1]^block0[2]^block0[3]; // BCC on byte 5 + Bytes 5-7 are reserved SAK and ATQA for mifare classic + -Use mfCSetBlock(0, block0, oldUID, wantWipe, CSETBLOCK_SINGLE_OPER) to write it + */ + uint8_t oldBlock0[16] = {0}, newBlock0[16] = {0}, testBlock0[16] = {0}; + // arg0 = Flags == CSETBLOCK_SINGLE_OPER=0x1F, arg1=returnSlot, arg2=blockNo + MifareCGetBlock(0x1F, 1, 0, oldBlock0); + Dbprintf("UID from target tag: %02X%02X%02X%02X", oldBlock0[0],oldBlock0[1],oldBlock0[2],oldBlock0[3]); + memcpy(newBlock0,oldBlock0,16); + // Copy uid_1st for bank (2nd is for longer UIDs not supported if classic) + newBlock0[0] = uid_1st[selected]>>24; + newBlock0[1] = 0xFF & (uid_1st[selected]>>16); + newBlock0[2] = 0xFF & (uid_1st[selected]>>8); + newBlock0[3] = 0xFF & (uid_1st[selected]); + newBlock0[4] = newBlock0[0]^newBlock0[1]^newBlock0[2]^newBlock0[3]; + // arg0 = needWipe, arg1 = workFlags, arg2 = blockNo, datain + MifareCSetBlock(0, 0xFF,0, newBlock0); + MifareCGetBlock(0x1F, 1, 0, testBlock0); + if (memcmp(testBlock0,newBlock0,16)==0) + { + DbpString("Cloned successfull!"); + cardRead[selected] = 0; // Only if the card was cloned successfully should we clear it + } + LEDsoff(); + LED(selected + 1, 0); + // Finished recording + + // If we were previously playing, set playing off + // so next button push begins playing what we recorded + playing = 0; + + } + // Change where to record (or begin playing) + else if (button_pressed && cardRead[selected]) + { + // Next option if we were previously playing + if (playing) + selected = (selected + 1) % OPTS; + playing = !playing; + + LEDsoff(); + LED(selected + 1, 0); + + // Begin transmitting + if (playing) + { + LED(LED_GREEN, 0); + DbpString("Playing"); + while (!BUTTON_HELD(500)) { // Loop simulating tag until the button is held a half-sec + Dbprintf("Simulating ISO14443a tag with uid[0]: %08x, uid[1]: %08x [Bank: %u]", uid_1st[selected],uid_2nd[selected],selected); + SimulateIso14443aTag(1,uid_1st[selected],uid_2nd[selected],NULL); + } + //cardRead[selected] = 1; + Dbprintf("Done playing [Bank: %u]",selected); + + /* We pressed a button so ignore it here with a delay */ + SpinDelay(300); + + // when done, we're done playing, move to next option + selected = (selected + 1) % OPTS; + playing = !playing; + LEDsoff(); + LED(selected + 1, 0); + } + else + while(BUTTON_PRESS()) + WDT_HIT(); + } + } +} +#endif +#endif /* OBJECTIVE Listen and detect an external reader. Determine the best location @@ -1031,8 +1249,16 @@ void __attribute__((noreturn)) AppMain(void) WDT_HIT(); #ifdef WITH_LF +#ifndef WITH_ISO14443a_StandAlone if (BUTTON_HELD(1000) > 0) SamyRun(); +#endif +#endif +#ifdef WITH_ISO14443a +#ifdef WITH_ISO14443a_StandAlone + if (BUTTON_HELD(1000) > 0) + StandAloneMode14a(); +#endif #endif } } -- 2.39.5