Kai Liu / Mbed 2 deprecated mbed_microECC

Micro-ECC is an open source implementation for ECC running in an embedded microcontroller. This is a port for mbed. Please do more test and update assembly optimization for Cortex-M, aka, ARM-thumb.

Dependencies:   mbed uECC

main.cpp@0:f83fc7ecf97b, 2017-09-07 (annotated)

Committer:
allankliu
Date:
Thu Sep 07 12:10:39 2017 +0000
Revision:
0:f83fc7ecf97b
Child:
2:a2a77f01dd26
Init version

Who changed what in which revision?

UserRevisionLine numberNew contents of line
allankliu 0:f83fc7ecf97b 1 /*
allankliu 0:f83fc7ecf97b 2 * Micro-ECC ported to mbed platform
allankliu 0:f83fc7ecf97b 3 * Original Author: Ken MacKay
allankliu 0:f83fc7ecf97b 4 * Original Project: https://github.com/kmackay/micro-ecc
allankliu 0:f83fc7ecf97b 5 * Ported by: Allan K Liu
allankliu 0:f83fc7ecf97b 6 *
allankliu 0:f83fc7ecf97b 7 * Micro-ECC is ported to mbed to evalute its performance
allankliu 0:f83fc7ecf97b 8 * Micro-ECC is optimized for ARM/ARM-thumb/ARM-thumb2/AVR platform
allankliu 0:f83fc7ecf97b 9 * Micro-ECC mbed version disabled thumb/thumb2 optimization because of its GCC syntax.
allankliu 0:f83fc7ecf97b 10 * PS: I am not good at assembly for those projects.
allankliu 0:f83fc7ecf97b 11 */
allankliu 0:f83fc7ecf97b 12
allankliu 0:f83fc7ecf97b 13 #include "mbed.h"
allankliu 0:f83fc7ecf97b 14 #include "uECC.h"
allankliu 0:f83fc7ecf97b 15
allankliu 0:f83fc7ecf97b 16 Serial pc(USBTX, USBRX);
allankliu 0:f83fc7ecf97b 17 AnalogIn rnd(A1);
allankliu 0:f83fc7ecf97b 18 Timer t;
allankliu 0:f83fc7ecf97b 19
allankliu 0:f83fc7ecf97b 20 void dumprand()
allankliu 0:f83fc7ecf97b 21 {
allankliu 0:f83fc7ecf97b 22 uint8_t buf[16];
allankliu 0:f83fc7ecf97b 23
allankliu 0:f83fc7ecf97b 24 pc.printf("plain_random:");
allankliu 0:f83fc7ecf97b 25 for(int i=0; i<16; i++){
allankliu 0:f83fc7ecf97b 26 buf[i] = rand();
allankliu 0:f83fc7ecf97b 27 pc.printf("%02X",buf[i]);
allankliu 0:f83fc7ecf97b 28 }
allankliu 0:f83fc7ecf97b 29 pc.printf("\r\n");
allankliu 0:f83fc7ecf97b 30
allankliu 0:f83fc7ecf97b 31 }
allankliu 0:f83fc7ecf97b 32
allankliu 0:f83fc7ecf97b 33 static int RNG(uint8_t *dest, unsigned size) {
allankliu 0:f83fc7ecf97b 34 // Use the least-significant bits from the ADC for an unconnected pin (or connected to a source of
allankliu 0:f83fc7ecf97b 35 // random noise). This can take a long time to generate random data if the result of analogRead(0)
allankliu 0:f83fc7ecf97b 36 // doesn't change very frequently.
allankliu 0:f83fc7ecf97b 37 pc.printf("Random:\r\n");
allankliu 0:f83fc7ecf97b 38 while (size) {
allankliu 0:f83fc7ecf97b 39 uint8_t val = 0;
allankliu 0:f83fc7ecf97b 40 for (unsigned i = 0; i < 8; ++i) {
allankliu 0:f83fc7ecf97b 41 //int init = rnd.read();
allankliu 0:f83fc7ecf97b 42 int init = rand();
allankliu 0:f83fc7ecf97b 43 pc.printf("%04X",init);
allankliu 0:f83fc7ecf97b 44 int count = 0;
allankliu 0:f83fc7ecf97b 45 //while (rnd.read() == init) {
allankliu 0:f83fc7ecf97b 46 while (rand() == init) {
allankliu 0:f83fc7ecf97b 47 ++count;
allankliu 0:f83fc7ecf97b 48 }
allankliu 0:f83fc7ecf97b 49
allankliu 0:f83fc7ecf97b 50 if (count == 0) {
allankliu 0:f83fc7ecf97b 51 val = (val << 1) | (init & 0x01);
allankliu 0:f83fc7ecf97b 52 } else {
allankliu 0:f83fc7ecf97b 53 val = (val << 1) | (count & 0x01);
allankliu 0:f83fc7ecf97b 54 }
allankliu 0:f83fc7ecf97b 55 }
allankliu 0:f83fc7ecf97b 56 *dest = val;
allankliu 0:f83fc7ecf97b 57 ++dest;
allankliu 0:f83fc7ecf97b 58 --size;
allankliu 0:f83fc7ecf97b 59 pc.printf("\r\n");
allankliu 0:f83fc7ecf97b 60 }
allankliu 0:f83fc7ecf97b 61
allankliu 0:f83fc7ecf97b 62 // NOTE: it would be a good idea to hash the resulting random data using SHA-256 or similar.
allankliu 0:f83fc7ecf97b 63 return 1;
allankliu 0:f83fc7ecf97b 64 }
allankliu 0:f83fc7ecf97b 65
allankliu 0:f83fc7ecf97b 66 void dumphex(const char* name, uint8_t* buf, uint8_t size){
allankliu 0:f83fc7ecf97b 67 pc.printf(name);
allankliu 0:f83fc7ecf97b 68 for(int i=0; i<size; i++){
allankliu 0:f83fc7ecf97b 69 pc.printf("%02X",buf[i]);
allankliu 0:f83fc7ecf97b 70 }
allankliu 0:f83fc7ecf97b 71 pc.printf("\r\n");
allankliu 0:f83fc7ecf97b 72 }
allankliu 0:f83fc7ecf97b 73
allankliu 0:f83fc7ecf97b 74 void loop(){
allankliu 0:f83fc7ecf97b 75 const struct uECC_Curve_t * curve = uECC_secp160r1();
allankliu 0:f83fc7ecf97b 76 int r;
allankliu 0:f83fc7ecf97b 77 long d;
allankliu 0:f83fc7ecf97b 78
allankliu 0:f83fc7ecf97b 79 uint8_t private1[21];
allankliu 0:f83fc7ecf97b 80 uint8_t private2[21];
allankliu 0:f83fc7ecf97b 81
allankliu 0:f83fc7ecf97b 82 uint8_t public1[40];
allankliu 0:f83fc7ecf97b 83 uint8_t public2[40];
allankliu 0:f83fc7ecf97b 84
allankliu 0:f83fc7ecf97b 85 uint8_t secret1[20];
allankliu 0:f83fc7ecf97b 86 uint8_t secret2[20];
allankliu 0:f83fc7ecf97b 87
allankliu 0:f83fc7ecf97b 88 pc.printf("Start ECC computation\r\n");
allankliu 0:f83fc7ecf97b 89 pc.printf("make key 1\r\n");
allankliu 0:f83fc7ecf97b 90 t.start();
allankliu 0:f83fc7ecf97b 91 uECC_make_key(public1, private1, curve);
allankliu 0:f83fc7ecf97b 92 dumphex("public1: ", public1, sizeof(public1));
allankliu 0:f83fc7ecf97b 93 dumphex("private1: ", private1, sizeof(private1));
allankliu 0:f83fc7ecf97b 94 t.stop(); d = t.read_ms();
allankliu 0:f83fc7ecf97b 95 t.reset(); t.start();
allankliu 0:f83fc7ecf97b 96 pc.printf("time: %dms\r\n",d);
allankliu 0:f83fc7ecf97b 97
allankliu 0:f83fc7ecf97b 98 pc.printf("make key 2\r\n");
allankliu 0:f83fc7ecf97b 99 t.start();
allankliu 0:f83fc7ecf97b 100 uECC_make_key(public2, private2, curve);
allankliu 0:f83fc7ecf97b 101 dumphex("public2: ", public2, sizeof(public2));
allankliu 0:f83fc7ecf97b 102 dumphex("private2: ", private2, sizeof(private2));
allankliu 0:f83fc7ecf97b 103 t.stop(); d = t.read_ms();
allankliu 0:f83fc7ecf97b 104 t.reset(); t.start();
allankliu 0:f83fc7ecf97b 105 pc.printf("time: %dms\r\n",d);
allankliu 0:f83fc7ecf97b 106
allankliu 0:f83fc7ecf97b 107 pc.printf("make share secret 1\r\n");
allankliu 0:f83fc7ecf97b 108 t.start();
allankliu 0:f83fc7ecf97b 109 r = uECC_shared_secret(public2, private1, secret1, curve);
allankliu 0:f83fc7ecf97b 110 pc.printf("r: %04X\r\n",r);
allankliu 0:f83fc7ecf97b 111 t.stop(); d = t.read_ms();
allankliu 0:f83fc7ecf97b 112 t.reset(); t.start();
allankliu 0:f83fc7ecf97b 113 pc.printf("time: %dms\r\n",d);
allankliu 0:f83fc7ecf97b 114
allankliu 0:f83fc7ecf97b 115 pc.printf("make share secret 2\r\n");
allankliu 0:f83fc7ecf97b 116 t.start();
allankliu 0:f83fc7ecf97b 117 r = uECC_shared_secret(public1, private2, secret2, curve);
allankliu 0:f83fc7ecf97b 118 pc.printf("r: %04X\r\n",r);
allankliu 0:f83fc7ecf97b 119 t.stop(); d = t.read_ms();
allankliu 0:f83fc7ecf97b 120 t.reset(); t.start();
allankliu 0:f83fc7ecf97b 121 pc.printf("time: %dms\r\n",d);
allankliu 0:f83fc7ecf97b 122
allankliu 0:f83fc7ecf97b 123 pc.printf("\r\n\r\n");
allankliu 0:f83fc7ecf97b 124 wait(1);
allankliu 0:f83fc7ecf97b 125 }
allankliu 0:f83fc7ecf97b 126
allankliu 0:f83fc7ecf97b 127 int main() {
allankliu 0:f83fc7ecf97b 128 pc.baud(115200);
allankliu 0:f83fc7ecf97b 129 dumprand();
allankliu 0:f83fc7ecf97b 130 wait(1);
allankliu 0:f83fc7ecf97b 131 pc.printf("\r\n\r\nmicroECC test\r\n");
allankliu 0:f83fc7ecf97b 132 uECC_set_rng(&RNG);
allankliu 0:f83fc7ecf97b 133 pc.printf("\r\n");
allankliu 0:f83fc7ecf97b 134
allankliu 0:f83fc7ecf97b 135 while(1) {
allankliu 0:f83fc7ecf97b 136 loop();
allankliu 0:f83fc7ecf97b 137 }
allankliu 0:f83fc7ecf97b 138 }