1 /* Copyright 2014, Kenneth MacKay. Licensed under the BSD 2-clause license. */ 2 3 #include "uECC.h" 4 5 #include <stdio.h> 6 #include <string.h> 7 8 #ifndef uECC_TEST_NUMBER_OF_ITERATIONS 9 #define uECC_TEST_NUMBER_OF_ITERATIONS 256 10 #endif 11 12 #if LPC11XX 13 14 #include "/Projects/lpc11xx/peripherals/uart.h" 15 #include "/Projects/lpc11xx/peripherals/time.h" 16 17 static uint64_t g_rand = 88172645463325252ull; 18 int fake_rng(uint8_t *dest, unsigned size) { 19 while(size) { 20 g_rand ^= (g_rand << 13); 21 g_rand ^= (g_rand >> 7); 22 g_rand ^= (g_rand << 17); 23 24 unsigned amount = (size > 8 ? 8 : size); 25 memcpy(dest, &g_rand, amount); 26 dest += amount; 27 size -= amount; 28 } 29 return 1; 30 } 31 32 #endif 33 34 void vli_print(char *str, uint8_t *vli, unsigned int size) { 35 printf("%s ", str); 36 while (size) { 37 printf("%02X ", (unsigned)vli[size - 1]); 38 --size; 39 } 40 printf("\n"); 41 } 42 43 int main() { 44 #if LPC11XX 45 uartInit(BAUD_115200); 46 initTime(); 47 48 uECC_set_rng(&fake_rng); 49 #endif 50 51 uint8_t public[uECC_BYTES * 2]; 52 uint8_t private[uECC_BYTES]; 53 uint8_t compressed_point[uECC_BYTES + 1]; 54 uint8_t decompressed_point[uECC_BYTES * 2]; 55 56 int i; 57 printf("Testing compression and decompression of %d random EC points\n", uECC_TEST_NUMBER_OF_ITERATIONS); 58 59 for (i = 0; i < uECC_TEST_NUMBER_OF_ITERATIONS; ++i) { 60 printf("."); 61 #if !LPC11XX 62 fflush(stdout); 63 #endif 64 65 /* Generate arbitrary EC point (public) on Curve */ 66 if (!uECC_make_key(public, private)) { 67 printf("uECC_make_key() failed\n"); 68 continue; 69 } 70 71 /* compress and decompress point */ 72 uECC_compress(public, compressed_point); 73 uECC_decompress(compressed_point, decompressed_point); 74 75 if (memcmp(public, decompressed_point, 2 * uECC_BYTES) != 0) { 76 printf("Original and decompressed points are not identical!\n"); 77 vli_print("Original point = ", public, 2 * uECC_BYTES); 78 vli_print("Compressed point = ", compressed_point, uECC_BYTES + 1); 79 vli_print("Decompressed point = ", decompressed_point, 2 * uECC_BYTES); 80 } 81 } 82 printf("\n"); 83 84 return 0; 85 } 86