300 lines
6.5 KiB
C
300 lines
6.5 KiB
C
#include <sysinit.h>
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#include <stdlib.h>
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#include <string.h>
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#include <stdio.h>
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#include <stdint.h>
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#include "basic/basic.h"
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#include "lcd/render.h"
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#include "lcd/allfonts.h"
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#include "basic/ecc.h"
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#include "funk/nrf24l01p.h"
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#include "filesystem/ff.h"
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#include "filesystem/diskio.h"
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#include "funk/filetransfer.h"
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#include "lcd/print.h"
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uint8_t mac[5] = {1,2,3,2,1};
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void sendPublicKey(void)
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{
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uint8_t exp[2 + 4*NUMWORDS + 2];
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char buf[42];
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UINT readbytes;
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FIL file;
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if( f_open(&file, "pubx.key", FA_OPEN_EXISTING|FA_READ) ){
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return;
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}
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if( f_read(&file, buf, 41, &readbytes) || readbytes != 41 ){
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return;
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}
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f_close(&file);
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buf[41] = 0;
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exp[0] = 'P';
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bitstr_parse_export((char*)exp+2, buf);
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exp[1] = 'X';
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nrf_snd_pkt_crc(32, exp);
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delayms(10);
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if( f_open(&file, "puby.key", FA_OPEN_EXISTING|FA_READ) ){
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return;
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}
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if( f_read(&file, buf, 41, &readbytes) || readbytes != 41 ){
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return;
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}
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f_close(&file);
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buf[41] = 0;
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exp[1] = 'Y';
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bitstr_parse_export((char*)exp+2, buf);
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nrf_snd_pkt_crc(32, exp);
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delayms(10);
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}
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void sendR(uint8_t *rx, uint8_t *ry)
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{
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uint8_t exp[2 + 4*NUMWORDS + 2];
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exp[0] = 'R';
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for(int i=0; i<4*NUMWORDS; i++)
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exp[2+i] = rx[i];
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exp[1] = 'X';
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nrf_snd_pkt_crc(32, exp);
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delayms(10);
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exp[1] = 'Y';
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for(int i=0; i<4*NUMWORDS; i++)
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exp[2+i] = ry[i];
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nrf_snd_pkt_crc(32, exp);
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delayms(10);
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}
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int receiveKey(uint8_t type, uint8_t *x, uint8_t *y)
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{
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uint8_t buf[32];
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uint8_t n;
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n = nrf_rcv_pkt_time(1000, 32, buf);
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if( n == 32 && buf[0] == type && buf[1] == 'X' ){
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for(int i=0; i<NUMWORDS*4; i++)
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x[i] = buf[i+2];
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n = nrf_rcv_pkt_time(100, 32, buf);
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if( n == 32 && buf[0] ==type && buf[1] == 'Y' ){
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for(int i=0; i<NUMWORDS*4; i++)
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y[i] = buf[i+2];
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return 0;
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}
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}
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return -1;
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}
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int receivePublicKey(uint8_t *px, uint8_t *py)
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{
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return receiveKey('P',px,py);
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}
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int receiveR(uint8_t *rx, uint8_t *ry)
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{
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return receiveKey('R',rx,ry);
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}
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void sendMac(void)
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{
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uint8_t buf[32];
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buf[0] = 'M';
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buf[1] = 'C';
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buf[2] = mac[0];
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buf[3] = mac[1];
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buf[4] = mac[2];
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buf[5] = mac[3];
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buf[6] = mac[4];
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nrf_snd_pkt_crc(32, buf);
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delayms(10);
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}
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int receiveMac(uint8_t *mac)
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{
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uint8_t buf[32];
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uint8_t n;
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n = nrf_rcv_pkt_time(100, 32, buf);
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if( n == 32 && buf[0] == 'M' && buf[1] == 'C' ){
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for(int i=0; i<5; i++)
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mac[i] = buf[i+2];
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return 0;
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}
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return -1;
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}
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int sendKeys(void)
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{
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uint8_t done = 0;
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char key;
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while( !done ){
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lcdClear();
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lcdPrintln("Sending PUBKEY");lcdRefresh();
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sendPublicKey();
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sendMac();
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lcdPrintln("Done");
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lcdPrintln("Right=OK");
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lcdPrintln("Left=Retry");
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lcdPrintln("Down=Abort");
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lcdRefresh();
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while(1){
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key = getInput();
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delayms(20);
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if( key == BTN_LEFT ){
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break;
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}else if( key == BTN_RIGHT ){
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done = 1;
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break;
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}else if( key == BTN_DOWN ){
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return -1;
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}
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}
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}
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return 0;
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}
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int receiveKeys(uint8_t *px, uint8_t *py, uint8_t *mac)
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{
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uint8_t done = 0;
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char key;
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while( !done ){
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lcdClear();
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lcdPrintln("Recv. PUBKEY");
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lcdPrintln("Down=Abort");
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lcdRefresh();
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key = getInput();
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delayms(20);
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if( key == BTN_DOWN ){
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return -1;
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}
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if( receivePublicKey(px,py) )
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continue;
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if( receiveMac(mac) )
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continue;
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lcdClear();
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lcdPrintln("Got PUBKEY"); lcdRefresh();
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lcdPrintln("Hash:");
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lcdPrintln("Right=OK");
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lcdPrintln("Left=Retry");
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lcdPrintln("Down=Abort");
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lcdRefresh();
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while(1){
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key = getInput();
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delayms(20);
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if( key == BTN_LEFT ){
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break;
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}else if( key == BTN_RIGHT ){
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done = 1;
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break;
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}else if( key == BTN_DOWN ){
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return -1;
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}
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}
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}
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return 0;
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}
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void receiveFile(void)
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{
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if( sendKeys() )
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return;
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char priv[42];
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UINT readbytes;
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FIL file;
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if( f_open(&file, "priv.key", FA_OPEN_EXISTING|FA_READ) ){
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return;
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}
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if( f_read(&file, priv, 41, &readbytes) || readbytes != 41 ){
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return;
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}
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f_close(&file);
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priv[41] = 0;
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uint8_t done = 0;
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uint8_t key;
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uint8_t k1[16], k2[16], rx[4*NUMWORDS], ry[4*NUMWORDS];
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while( !done ){
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lcdClear();
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lcdPrintln("Receiving file");
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lcdPrintln("Down=Abort");
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lcdRefresh();
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key = getInput();
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delayms(20);
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if( key == BTN_DOWN ){
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return -1;
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}
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if( receiveR(rx,ry) )
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continue;
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lcdPrintln("Creating key");
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lcdRefresh();
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ECIES_decryptkeygen(rx, ry, k1, k2, priv);
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if( filetransfer_receive(mac,(uint32_t*)k1) < 0 )
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continue;
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lcdPrintln("Right=OK");
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lcdPrintln("Left=Retry");
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lcdPrintln("Down=Abort");
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lcdRefresh();
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while(1){
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key = getInput();
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delayms(20);
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if( key == BTN_LEFT ){
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break;
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}else if( key == BTN_RIGHT ){
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done = 1;
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break;
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}else if( key == BTN_DOWN ){
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return -1;
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}
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}
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}
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}
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void sendFile(char *filename)
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{
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uint8_t px[4*NUMWORDS];
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uint8_t py[4*NUMWORDS];
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uint8_t mac[5];
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if( receiveKeys(px, py, mac) )
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return;
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uint8_t done = 0;
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uint8_t key;
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uint8_t k1[16], k2[16], rx[4*NUMWORDS], ry[4*NUMWORDS];
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lcdClear();
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lcdPrintln("Creating key"); lcdRefresh();
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ECIES_encyptkeygen(px, py, k1, k2, rx, ry);
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while( !done ){
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lcdPrintln("Sending file");lcdRefresh();
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sendR(rx,ry);
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delayms(3000);
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filetransfer_send((uint8_t*)filename, 0, mac, (uint32_t*)k1);
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lcdPrintln("Done");
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lcdPrintln("Right=OK");
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lcdPrintln("Left=Retry");
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lcdRefresh();
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while(1){
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key = getInput();
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delayms(20);
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if( key == BTN_LEFT ){
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break;
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}else if( key == BTN_RIGHT ){
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done = 1;
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break;
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}
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}
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lcdClear();
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}
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}
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