| /* Copyright 2014, Kenneth MacKay. Licensed under the BSD 2-clause license. */ |
| |
| #include "uECC.h" |
| |
| #include <stdio.h> |
| #include <string.h> |
| |
| #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(uint8_t *vli, unsigned int size) { |
| while (size) { |
| printf("%02X ", (unsigned)vli[size - 1]); |
| --size; |
| } |
| } |
| |
| int main() { |
| #if LPC11XX |
| uartInit(BAUD_115200); |
| initTime(); |
| |
| uECC_set_rng(&fake_rng); |
| #endif |
| |
| int i; |
| uint8_t private1[uECC_BYTES]; |
| uint8_t private2[uECC_BYTES]; |
| uint8_t public1[uECC_BYTES * 2]; |
| uint8_t public2[uECC_BYTES * 2]; |
| uint8_t secret1[uECC_BYTES]; |
| uint8_t secret2[uECC_BYTES]; |
| |
| printf("Testing 256 random private key pairs\n"); |
| |
| for (i = 0; i < 256; ++i) { |
| printf("."); |
| #if !LPC11XX |
| fflush(stdout); |
| #endif |
| |
| if (!uECC_make_key(public1, private1) || !uECC_make_key(public2, private2)) { |
| printf("uECC_make_key() failed\n"); |
| return 1; |
| } |
| |
| if (!uECC_shared_secret(public2, private1, secret1)) { |
| printf("shared_secret() failed (1)\n"); |
| return 1; |
| } |
| |
| if (!uECC_shared_secret(public1, private2, secret2)) { |
| printf("shared_secret() failed (2)\n"); |
| return 1; |
| } |
| |
| if (memcmp(secret1, secret2, sizeof(secret1)) != 0) { |
| printf("Shared secrets are not identical!\n"); |
| printf("Shared secret 1 = "); |
| vli_print(secret1, uECC_BYTES); |
| printf("\n"); |
| printf("Shared secret 2 = "); |
| vli_print(secret2, uECC_BYTES); |
| printf("\n"); |
| printf("Private key 1 = "); |
| vli_print(private1, uECC_BYTES); |
| printf("\n"); |
| printf("Private key 2 = "); |
| vli_print(private2, uECC_BYTES); |
| printf("\n"); |
| } |
| } |
| printf("\n"); |
| |
| return 0; |
| } |