Merge pull request #44 from emargolis/master

Added support for new secp224r1 curve.

Author: kmackay

asm_arm.inc

@@ -1,5 +1,6 @@
 #define DEC_5 4
 #define DEC_6 5
+#define DEC_7 6
 #define DEC_8 7
 
 #define DEC(N) uECC_CONCAT(DEC_, N)

asm_avr.inc

@@ -1,5 +1,6 @@
 #define DEC_20 19
 #define DEC_24 23
+#define DEC_28 27
 #define DEC_32 31
 
 #define DEC(N) uECC_CONCAT(DEC_, N)

test/test_compress.c

@@ -0,0 +1,85 @@
+/* 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;
+}