| /* Copyright 2014, Kenneth MacKay. Licensed under the BSD 2-clause license. */ |
| |
| #include "uECC.h" |
| |
| #include <stdio.h> |
| #include <string.h> |
| |
| #ifndef uECC_TEST_NUMBER_OF_ITERATIONS |
| #define uECC_TEST_NUMBER_OF_ITERATIONS 256 |
| #endif |
| |
| #if LPC11XX |
| |
| #include "/Projects/lpc11xx/peripherals/uart.h" |
| #include "/Projects/lpc11xx/peripherals/time.h" |
| |
| static uint64_t g_rand = 88172645463325252ull; |
| int fake_rng(uint8_t *dest, unsigned size) { |
| while(size) { |
| g_rand ^= (g_rand << 13); |
| g_rand ^= (g_rand >> 7); |
| g_rand ^= (g_rand << 17); |
| |
| unsigned amount = (size > 8 ? 8 : size); |
| memcpy(dest, &g_rand, amount); |
| dest += amount; |
| size -= amount; |
| } |
| return 1; |
| } |
| |
| #endif |
| |
| void vli_print(char *str, uint8_t *vli, unsigned int size) { |
| printf("%s ", str); |
| while (size) { |
| printf("%02X ", (unsigned)vli[size - 1]); |
| --size; |
| } |
| printf("\n"); |
| } |
| |
| int main() { |
| #if LPC11XX |
| uartInit(BAUD_115200); |
| initTime(); |
| |
| uECC_set_rng(&fake_rng); |
| #endif |
| |
| uint8_t public[uECC_BYTES * 2]; |
| uint8_t private[uECC_BYTES]; |
| uint8_t compressed_point[uECC_BYTES + 1]; |
| uint8_t decompressed_point[uECC_BYTES * 2]; |
| |
| int i; |
| printf("Testing compression and decompression of %d random EC points\n", uECC_TEST_NUMBER_OF_ITERATIONS); |
| |
| for (i = 0; i < uECC_TEST_NUMBER_OF_ITERATIONS; ++i) { |
| printf("."); |
| #if !LPC11XX |
| fflush(stdout); |
| #endif |
| |
| /* Generate arbitrary EC point (public) on Curve */ |
| if (!uECC_make_key(public, private)) { |
| printf("uECC_make_key() failed\n"); |
| continue; |
| } |
| |
| /* compress and decompress point */ |
| uECC_compress(public, compressed_point); |
| uECC_decompress(compressed_point, decompressed_point); |
| |
| if (memcmp(public, decompressed_point, 2 * uECC_BYTES) != 0) { |
| printf("Original and decompressed points are not identical!\n"); |
| vli_print("Original point = ", public, 2 * uECC_BYTES); |
| vli_print("Compressed point = ", compressed_point, uECC_BYTES + 1); |
| vli_print("Decompressed point = ", decompressed_point, 2 * uECC_BYTES); |
| } |
| } |
| printf("\n"); |
| |
| return 0; |
| } |