Commit c1b17d4e authored by hark's avatar hark
parents aa013437 6c691b4e
USER_LIB_PATH=../arduino-build/libraries/
BOARD_TAG=atmega328
ARDUINO_LIBS=RadioHead SPI AESLib Wire LCDI2C_LK162
ARDUINO_LIBS=RadioHead SPI AESLib Wire LCDI2C_LK162 MemoryFree micro-ecc
include /usr/share/arduino/Arduino.mk
DEVICE_PATH = /dev/ttyUSB2
......
......@@ -5,7 +5,7 @@
// Implements a simplex (one-way) receiver with an Rx-B1 module
#include <stdarg.h>
#include <ecc.h>
#include <uECC.h>
#include <AESLib.h>
#include <RadioHead.h>
#include <RH_ASK.h>
......@@ -14,9 +14,11 @@
#include <string.h>
#include <Wire.h>
#include <LCDI2C_LK162-12.h>
#include <MemoryFree.h>
#define BLOCK_SIZE 16
#define NUM_BLOCKS 4
#define NUM_ECC_DIGITS 24 //size of privkey, curvesize in bytes
LCDI2C lcd = LCDI2C(2,16,0x50,0);
......@@ -26,33 +28,9 @@ aes_context ctx; // context for the cbc crypto stuff
RH_ASK driver(5000);
RHDatagram manager(driver, ADDRESS);
// pubkey in readable format
uint8_t pubkey[2][NUM_ECC_DIGITS];
//my pub-priv keypair
uint8_t privkey[NUM_ECC_DIGITS] = {0x4D, 0xDE, 0x17, 0xCE, 0xAC, 0x4F, 0x81, 0x25, 0xA9, 0xE5, 0xC1, 0x82, 0x79, 0x65, 0x71, 0x13, 0x47, 0xD6, 0xF4, 0x3B, 0x5E, 0x1F, 0x27, 0x53};
EccPoint localPubkey = {
{0xF3, 0xCD, 0x7D, 0x81, 0x15, 0x01, 0xC0, 0x3E, 0xB5, 0x56, 0x5B, 0xF1, 0x1A, 0x99, 0xFB, 0x0B, 0x20, 0x2B, 0x18, 0x82, 0xD3, 0x71, 0x6F, 0x1E},
{0x4B, 0x84, 0xC7, 0xDD, 0x67, 0x6B, 0xED, 0x45, 0x1A, 0x4B, 0x54, 0x5A, 0x19, 0xCA, 0x1B, 0x6F, 0x3B, 0x93, 0xBA, 0xF4, 0x2A, 0x9B, 0x65, 0x69}};
EccPoint remotePubkey;
void p(char *fmt, ... ){
char tmp[128]; // resulting string limited to 128 chars
va_list args;
va_start (args, fmt );
vsnprintf(tmp, 128, fmt, args);
va_end (args);
Serial.print(tmp);
}
void dump(char *text, uint8_t *d) {
int i ;
p("%-20s", text);
for (i = 0; i < NUM_ECC_DIGITS; ++i)
p("%02x ", d[NUM_ECC_DIGITS-i-1]);
Serial.print("\n");
}
// uECC keys
uint8_t privkey[25] = {0x50, 0xEA, 0x8F, 0x57, 0xFD, 0xBE, 0x75, 0xAE, 0x17, 0x70, 0xC6, 0xF0, 0x51, 0x11, 0x5C, 0xA, 0xF6, 0xFE, 0xCF, 0x4, 0xC9, 0xBD, 0xFC, 0x7D, 0xD6};
uint8_t pubkey[48] = {0x27, 0x8C, 0x41, 0x2C, 0x1F, 0xF2, 0xA9, 0xCB, 0x78, 0xC4, 0x1E, 0xBB, 0x2B, 0x32, 0x32, 0x34, 0xC3, 0x5B, 0xD1, 0x87, 0x52, 0x6C, 0xBD, 0x7F, 0x44, 0x73, 0xDC, 0xF0, 0xFC, 0x93, 0x97, 0x99, 0x46, 0x16, 0xE0, 0x8F, 0x65, 0xA4, 0xCB, 0x65, 0x59, 0xA8, 0xBF, 0xFD, 0xB4, 0x61, 0x23, 0xA8};
uint8_t* generateIV()
{
......@@ -87,34 +65,111 @@ char* decryptAES(uint8_t* p_secret, char* p_data, const aes_context ctx)
Serial.println("done");
return p_data;
}
/*
// calculate shared secret using remote public key and local private key
// returns the shared secret
uint8_t calcSharedSecret(EccPoint *p_pubkey, uint8_t p_privkey[NUM_ECC_DIGITS])
uint8_t calcSharedSecret(uint8_t *p_pubkey, uint8_t p_privkey[NUM_ECC_DIGITS], uECC_Curve curve)
{
Serial.print("Calculating shared secret...");
uint8_t secret[NUM_ECC_DIGITS];
ecdh_shared_secret(secret, p_pubkey, p_privkey, NULL);
//dump("secret", secret);
uint8_t secret[24];
unsigned long a = millis();
int r = uECC_shared_secret(p_pubkey, p_privkey, secret, curve);
unsigned long b = millis();
Serial.print("Shared secret 1 in "); Serial.println(b-a);
if (!r) {
Serial.print("shared_secret() failed (1)\n");
return 0;
}
return *secret;
}
*/
static int RNG(uint8_t *dest, unsigned size) {
// Use the least-significant bits from the ADC for an unconnected pin (or connected to a source of
// random noise). This can take a long time to generate random data if the result of analogRead(0)
// doesn't change very frequently.
while (size) {
uint8_t val = 0;
for (unsigned i = 0; i < 8; ++i) {
int init = analogRead(0);
int count = 0;
while (analogRead(0) == init) {
++count;
}
if (count == 0) {
val = (val << 1) | (init & 0x01);
} else {
val = (val << 1) | (count & 0x01);
}
}
*dest = val;
++dest;
--size;
}
// NOTE: it would be a good idea to hash the resulting random data using SHA-256 or similar.
return 1;
}
void generateKeys()
{
const struct uECC_Curve_t * curve = uECC_secp192r1();
uint8_t private1[25];
uint8_t public1[48];
uint8_t secret1[24];
unsigned long a = millis();
uECC_make_key(public1, private1, curve);
unsigned long b = millis();
Serial.print("Generated keypair in "); Serial.print(b-a); Serial.println("Milliseconds");
Serial.println("Public key:");
for( int i = 0 ; i < sizeof(public1); i++){
Serial.print("0x");
Serial.print(public1[i], HEX);
Serial.print(", ");
}
Serial.println("");
Serial.println("Private key:");
for( int i = 0 ; i < sizeof(private1); i++){
Serial.print("0x");
Serial.print(private1[i], HEX);
Serial.print(", ");
}
Serial.println("");
}
void setup()
{
lcd.init();
lcd.println("dit is een pager");
Serial.begin(9600); // Debugging only
Serial.println("hoi");
Serial.println("RX init");
if (!manager.init())
Serial.println("init failed");
randomSeed(analogRead(0));
// randomSeed(analogRead(0));
Serial.print("freeMemory()=");
Serial.println(freeMemory());
uECC_set_rng(&RNG);
}
void hashSecret(uint8_t *p_secret)
{
Serial.println("Secret:");
for( int i=0; i < NUM_ECC_DIGITS; i++){
Serial.print(p_secret[i]);
Serial.print(" ");
}
Serial.println("");
}
void loop()
{
// generateKeys(); function to generate keys, have to make a program for this to run on a computer
// crypto vars //
uint8_t sharedSecret;
uint8_t remotePubkey[48];
uint8_t sharedSecret[NUM_ECC_DIGITS];
const struct uECC_Curve_t * curve = uECC_secp192r1();
// Radio vars //
uint8_t* receivedData;
......@@ -132,48 +187,42 @@ void loop()
Serial.print(id);
Serial.println(" : ");
if (id == 50){ // receiving a public key...
for (int i = 0 ; i < NUM_ECC_DIGITS ; i++){
remotePubkey.x[i] = buf[i];
//Serial.println(remotePubkey.x[i]);
}
for (int i = NUM_ECC_DIGITS ; i < NUM_ECC_DIGITS*2 ; i++){
remotePubkey.y[i-NUM_ECC_DIGITS] = buf[i];
//Serial.println(remotePubkey.y[i-NUM_ECC_DIGITS]);
}
}
if (id == 51){ // receiving an encrypted message...
Serial.println("Storing received message");
receivedData = buf;
}
}
if( ecc_valid_public_key(&remotePubkey) == 1 ){
Serial.println("Valid public key received");
sharedSecret = calcSharedSecret(&remotePubkey, privkey);
Serial.println("Done!");
}
Serial.println((char*)receivedData);
/*
// Crypto //
char* data = "Hallo dit is een testbericht jwz";
if (id == 50){ // receiving a public key...
for (int i = 0 ; i < NUM_ECC_DIGITS*2 ; i++){
remotePubkey[i] = buf[i];
//Serial.println(remotePubkey.x[i]);
}
}
if (id == 51){ // receiving an encrypted message...
Serial.println("Storing received message");
receivedData = buf;
Serial.println((char*)receivedData);
}
}
if(uECC_valid_public_key(remotePubkey, curve) == 1){
Serial.println("Valid pubkey");
uECC_shared_secret(remotePubkey, privkey, sharedSecret, curve);
hashSecret(sharedSecret);
}
else
Serial.println("Invalid pubkey");
uint8_t sharedSecret = calcSharedSecret(&remotePubkey, privkey);
char* encryptedData;
/* // CBC Crypto //
char* decryptedData;
// uint8_t* iv = generateIV();
// uint8_t* iv = generateIV();
uint8_t iv[16] = {4,9,4,9,4,9,4,9,4,9,4,9,4,9,4,9};
ctx = aes128_cbc_enc_start(&sharedSecret, iv);
encryptedData = encryptAES(&sharedSecret, data, ctx);
ctx = aes128_cbc_enc_start(&sharedSecret, iv);
decryptedData = decryptAES(&sharedSecret, encryptedData, ctx);
ctx = aes128_cbc_dec_start(&sharedSecret, iv);
decryptedData = decryptAES(&sharedSecret, ((char*)receivedData), ctx);
Serial.print("decrypted data:");
Serial.println(decryptedData);
Serial.println ("");
*/
/*
// single block crypto //
aes128_dec_single(&sharedSecret, receivedData);
Serial.println((char*)receivedData);
*/
}
BOARD_TAG=atmega328
USER_LIB_PATH=../libs/
ARDUINO_LIBS=RadioHead SPI AESLib
ARDUINO_LIBS=RadioHead SPI AESLib micro-ecc
include /usr/share/arduino/Arduino.mk
DEVICE_PATH = /dev/ttyUSB1
......
......@@ -5,7 +5,7 @@
// Implements a simplex (one-way) transmitter with an TX-C1 module
#include <ecc.h>
#include <uECC.h>
#include <AESLib.h>
#include <RadioHead.h>
#include <RH_ASK.h>
......@@ -16,38 +16,16 @@
#define NUM_BLOCKS 4
#define ADDRESS 5
#define NUM_ECC_DIGITS 24 //size of privkey, curvesize in bytes
aes_context ctx;
RH_ASK driver(5000);
RHDatagram manager(driver, ADDRESS);
//my pub-priv keypair
uint8_t privkey[NUM_ECC_DIGITS] = {0x14, 0x14, 0x92, 0x2D, 0x2E, 0x00, 0x87, 0x16, 0x2D, 0x43, 0x0E, 0xC1, 0x8A, 0xD0, 0x0A, 0x1E, 0xEE, 0x89, 0x4F, 0x17, 0x3F, 0xB1, 0x1B, 0x5A};
EccPoint localPubkey = {
{0x90, 0x6F, 0xFC, 0xC8, 0x07, 0xA8, 0x93, 0x9C, 0x3B, 0xDC, 0xAF, 0xF1, 0x8D, 0xA9, 0x96, 0xF8, 0xC2, 0x3B, 0x85, 0x3E, 0x5C, 0x65, 0xDE, 0x32},
{0xE1, 0xB1, 0x28, 0x7F, 0xD3, 0xB0, 0x94, 0x24, 0x69, 0x95, 0xDE, 0x76, 0x40, 0x15, 0x6E, 0xAE, 0x74, 0xE9, 0x56, 0x94, 0xA7, 0xE4, 0x63, 0xEF}};
//other pubkey
EccPoint remotePubkey = {
{0xF3, 0xCD, 0x7D, 0x81, 0x15, 0x01, 0xC0, 0x3E, 0xB5, 0x56, 0x5B, 0xF1, 0x1A, 0x99, 0xFB, 0x0B, 0x20, 0x2B, 0x18, 0x82, 0xD3, 0x71, 0x6F, 0x1E},
{0x4B, 0x84, 0xC7, 0xDD, 0x67, 0x6B, 0xED, 0x45, 0x1A, 0x4B, 0x54, 0x5A, 0x19, 0xCA, 0x1B, 0x6F, 0x3B, 0x93, 0xBA, 0xF4, 0x2A, 0x9B, 0x65, 0x69}};
void p(char *fmt, ... ){
char tmp[128]; // resulting string limited to 128 chars
va_list args;
va_start (args, fmt );
vsnprintf(tmp, 128, fmt, args);
va_end (args);
Serial.print(tmp);
}
// uECC keys
uint8_t privkey[25] = {0xED, 0x3F, 0xB6, 0xB, 0x20, 0x3F, 0x54, 0xEE, 0xCF, 0xAF, 0xFC, 0xB6, 0x1F, 0x89, 0x1, 0x4, 0x5B, 0xFF, 0x67, 0xEF, 0xDA, 0xFF, 0xD7, 0xD2, 0xD6};
uint8_t pubkey[48] = {0xC3, 0xFB, 0xBD, 0xF3, 0x31, 0x6E, 0x12, 0x63, 0x6A, 0x5F, 0x2, 0xAB, 0x18, 0xF0, 0xF3, 0x43, 0xB3, 0x18, 0xA2, 0x6D, 0x60, 0x28, 0xC4, 0x5F, 0x33, 0x5E, 0x4D, 0xEC, 0x99, 0xA6, 0xF, 0x42, 0xFE, 0x55, 0xD6, 0x2C, 0x78, 0x8A, 0x4C, 0x22, 0xCC, 0x17, 0xF2, 0x6E, 0x4B, 0xC4, 0xFD, 0x22};
void dump(char *text, uint8_t *d) {
int i;
p("%-20s", text);
for (i = 0; i < NUM_ECC_DIGITS; ++i)
p("%02x ", d[NUM_ECC_DIGITS-i-1]);
Serial.print("\n");
}
uint8_t remotePubkey[48] = {0x27, 0x8C, 0x41, 0x2C, 0x1F, 0xF2, 0xA9, 0xCB, 0x78, 0xC4, 0x1E, 0xBB, 0x2B, 0x32, 0x32, 0x34, 0xC3, 0x5B, 0xD1, 0x87, 0x52, 0x6C, 0xBD, 0x7F, 0x44, 0x73, 0xDC, 0xF0, 0xFC, 0x93, 0x97, 0x99, 0x46, 0x16, 0xE0, 0x8F, 0x65, 0xA4, 0xCB, 0x65, 0x59, 0xA8, 0xBF, 0xFD, 0xB4, 0x61, 0x23, 0xA8};
uint8_t* generateIV()
{
......@@ -82,67 +60,88 @@ char* decryptAES(uint8_t* p_secret, char* p_data, const aes_context ctx)
Serial.println("done");
return p_data;
}
/*
// calculate shared secret using remote public key and local private key
// returns the shared secret
uint8_t calcSharedSecret(EccPoint *p_pubkey, uint8_t p_privkey[NUM_ECC_DIGITS])
uint8_t * calcSharedSecret(uint8_t *p_pubkey, uint8_t *p_privkey, uECC_Curve curve)
{
Serial.println("Calculating shared secret...");
uint8_t secret[NUM_ECC_DIGITS];
ecdh_shared_secret(secret, p_pubkey, p_privkey, NULL);
//dump("secret", secret);
return *secret;
Serial.print("Calculating shared secret...");
uint8_t secret[24];
unsigned long a = millis();
int r = uECC_shared_secret(p_pubkey, p_privkey, secret, curve);
unsigned long b = millis();
Serial.print("Shared secret 1 in "); Serial.println(b-a);
if (!r) {
Serial.print("shared_secret() failed (1)\n");
return 0;
}
return secret;
}
*/
void setup()
{
Serial.begin(9600); // Debugging only
Serial.println("het werkt");
Serial.println("TX init");
if (!manager.init())
Serial.println("init failed");
}
void sendPubkey()
{
char* msg = "pubkey";
uint8_t pubkey[NUM_ECC_DIGITS*2];
for(uint8_t i = 0; i < NUM_ECC_DIGITS; i++){
pubkey[i] = localPubkey.x[i];
}
for(uint8_t i = NUM_ECC_DIGITS; i < NUM_ECC_DIGITS*2; i++){
pubkey[i] = localPubkey.y[i-NUM_ECC_DIGITS];
}
manager.setHeaderId(50);
manager.sendto((uint8_t *)pubkey, 48, 2);
manager.waitPacketSent();
Serial.println("sending public key...");
}
void sendMessage()
void sendMessage(char* msg)
{
Serial.println("Sending message...");
char* msg = "hallo";
//char* msg = "hallo";
manager.setHeaderId(51);
manager.sendto((uint8_t *)msg, 48, 2);
// manager.sendto((uint8_t *)msg, 48, 2);
manager.waitPacketSent();
}
void hashSecret(uint8_t *p_secret)
{
Serial.println("Secret:");
for( int i=0; i < NUM_ECC_DIGITS; i++){
Serial.print(p_secret[i]);
Serial.print(" ");
}
Serial.println("");
}
void loop()
{
// crypto vars //
uint8_t sharedSecret;
char* data = "Hallo";
char* encryptedData;
uint8_t iv[16] = {4,9,4,9,4,9,4,9,4,9,4,9,4,9,4,9};
uint8_t sharedSecret[24];
const struct uECC_Curve_t * curve = uECC_secp192r1();
// char* data = "Hallo";
// char* encryptedData;
// uint8_t iv[16] = {4,9,4,9,4,9,4,9,4,9,4,9,4,9,4,9};
sendPubkey();
sharedSecret = calcSharedSecret(&remotePubkey, privkey);
ctx = aes128_cbc_enc_start(&sharedSecret, iv);
if(uECC_valid_public_key(remotePubkey, curve) == 1){
Serial.println("Valid pubkey");
uECC_shared_secret(remotePubkey, privkey, sharedSecret, curve);
hashSecret(sharedSecret);
}
else
Serial.println("Invalid pubkey");
// ctx = aes128_cbc_enc_start(&sharedSecret, iv);
// encryptedData = encryptAES(&sharedSecret, data, ctx);
delay(10000);
sendMessage();
delay(5000);
//
// delay(10000);
// sendMessage(data);
// delay(5000);
}
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