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;
fake_rng(uint8_t * dest,unsigned size)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
vli_print(char * str,uint8_t * vli,unsigned int size)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
main()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