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