#include <sysinit.h> #include <stdlib.h> #include <string.h> #include <stdio.h> #include <stdint.h> #include "basic/basic.h" #include "lcd/render.h" #include "lcd/allfonts.h" #include "basic/ecc.h" #include "funk/nrf24l01p.h" #include "filesystem/ff.h" #include "filesystem/diskio.h" #include "funk/filetransfer.h" #include "lcd/print.h" #include <string.h> #include "funk/nrf24l01p.h" #include "funk/filetransfer.h" #include "funk/rftransfer.h" #include "basic/basic.h" #include "basic/xxtea.h" #include "filesystem/ff.h" #include "funk/rftransfer.h" #include "funk/nrf24l01p.h" #include <basic/basic.h> #include <basic/random.h> #include <core/systick/systick.h> //#include <lcd/print.h> #include "usetable.h" //#include "lcd/print.h" uint8_t mac[5] = {1,2,3,2,1}; void ram(void) { char file[13]; selectFile(file,"TXT"); sendFile(file); } void sendR(uint8_t *rx, uint8_t *ry) { uint8_t exp[2 + 4*NUMWORDS + 2]; exp[0] = 'R'; for(int i=0; i<4*NUMWORDS; i++) exp[2+i] = rx[i]; exp[1] = 'X'; nrf_snd_pkt_crc(32, exp); delayms(10); exp[1] = 'Y'; for(int i=0; i<4*NUMWORDS; i++) exp[2+i] = ry[i]; nrf_snd_pkt_crc(32, exp); delayms(10); } int receiveKey(uint8_t type, uint8_t *x, uint8_t *y) { uint8_t buf[32]; uint8_t n; n = nrf_rcv_pkt_time(1000, 32, buf); if( n == 32 && buf[0] == type && buf[1] == 'X' ){ for(int i=0; i<NUMWORDS*4; i++) x[i] = buf[i+2]; n = nrf_rcv_pkt_time(100, 32, buf); if( n == 32 && buf[0] ==type && buf[1] == 'Y' ){ for(int i=0; i<NUMWORDS*4; i++) y[i] = buf[i+2]; return 0; } } return -1; } int receivePublicKey(uint8_t *px, uint8_t *py) { return receiveKey('P',px,py); } void sendMac(void) { uint8_t buf[32]; buf[0] = 'M'; buf[1] = 'C'; buf[2] = mac[0]; buf[3] = mac[1]; buf[4] = mac[2]; buf[5] = mac[3]; buf[6] = mac[4]; nrf_snd_pkt_crc(32, buf); delayms(10); } int receiveMac(uint8_t *mac) { uint8_t buf[32]; uint8_t n; n = nrf_rcv_pkt_time(100, 32, buf); if( n == 32 && buf[0] == 'M' && buf[1] == 'C' ){ for(int i=0; i<5; i++) mac[i] = buf[i+2]; return 0; } return -1; } int receiveKeys(uint8_t *px, uint8_t *py, uint8_t *mac) { uint8_t done = 0; char key; while( !done ){ lcdClear(); lcdPrintln("Recv. PUBKEY"); lcdPrintln("Down=Abort"); lcdRefresh(); key = getInput(); delayms(20); if( key == BTN_DOWN ){ return -1; } if( receivePublicKey(px,py) ) continue; if( receiveMac(mac) ) continue; lcdClear(); lcdPrintln("Got PUBKEY"); lcdRefresh(); lcdPrintln("Hash:"); lcdPrintln("Right=OK"); lcdPrintln("Left=Retry"); lcdPrintln("Down=Abort"); lcdRefresh(); while(1){ key = getInput(); delayms(20); if( key == BTN_LEFT ){ break; }else if( key == BTN_RIGHT ){ done = 1; break; }else if( key == BTN_DOWN ){ return -1; } } } return 0; } void sendFile(char *filename) { uint8_t px[4*NUMWORDS]; uint8_t py[4*NUMWORDS]; uint8_t mac[5]; if( receiveKeys(px, py, mac) ) return; uint8_t done = 0; uint8_t key; uint8_t k1[16], k2[16], rx[4*NUMWORDS], ry[4*NUMWORDS]; lcdClear(); lcdPrintln("Creating key"); lcdRefresh(); ECIES_encyptkeygen(px, py, k1, k2, rx, ry); while( !done ){ lcdPrintln("Sending file");lcdRefresh(); sendR(rx,ry); delayms(3000); filetransfer_send((uint8_t*)filename, 0, mac, (uint32_t*)k1); lcdPrintln("Done"); lcdPrintln("Right=OK"); lcdPrintln("Left=Retry"); lcdRefresh(); while(1){ key = getInput(); delayms(20); if( key == BTN_LEFT ){ break; }else if( key == BTN_RIGHT ){ done = 1; break; } } lcdClear(); } } //TODO: use a proper MAC to sign the message int filetransfer_send(uint8_t *filename, uint16_t size, uint8_t *mac, uint32_t const k[4]) { uint8_t buf[MAXSIZE]; FIL file; FRESULT res; UINT readbytes; if( size > MAXSIZE ) return 1; //File to big res=f_open(&file, (const char*)filename, FA_OPEN_EXISTING|FA_READ); if( res ) return res; //res = f_read(&file, (char *)buf, size, &readbytes); for(uint16_t i=0; i<MAXSIZE; i++) buf[i] = 0; res = f_read(&file, (char *)buf, MAXSIZE, &readbytes); size = readbytes; if( res ) return res; if( size != readbytes) return 1; //Error while reading uint16_t wordcount = (size+3)/4; //uint8_t macbuf[5]; uint8_t metadata[32]; if( strlen((char*)filename) < 20 ) strcpy((char*)metadata, (char*)filename); else return 1; //File name too long metadata[20] = size >> 8; metadata[21] = size & 0xFF; //nrf_get_tx_max(5,macbuf); //nrf_set_tx_mac(5, mac); nrf_snd_pkt_crc_encr(32, metadata, k); delayms(20); xxtea_encode_words((uint32_t *)buf, wordcount, k); rftransfer_send(wordcount*4, buf); //nrf_set_tx_mac(5, macbuf); return 0; } #define MAXPACKET 32 void rftransfer_send(uint16_t size, uint8_t *data) { uint8_t buf[MAXPACKET]; buf[0] = 'L'; buf[1] = size >> 8; buf[2] = size & 0xFF; uint16_t rand = getRandom() & 0xFFFF; buf[3] = rand >> 8; buf[4] = rand & 0xFF; nrf_snd_pkt_crc(32,buf); //setup packet delayms(20); uint16_t index = 0; uint8_t i; uint16_t crc = crc16(data,size); while(size){ buf[0] = 'D'; buf[1] = index >> 8; buf[2] = index & 0xFF; buf[3] = rand >> 8; buf[4] = rand & 0xFF; for(i=5; i<MAXPACKET-2 && size>0; i++,size--){ buf[i] = *data++; } index++; nrf_snd_pkt_crc(32,buf); //data packet delayms(20); } buf[0] = 'C'; buf[1] = crc >> 8; buf[2] = crc & 0xFF; buf[3] = rand >> 8; buf[4] = rand & 0xFF; nrf_snd_pkt_crc(32,buf); //setup packet delayms(20); }