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zkbdf_eval.c
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zkbdf_eval.c
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/*
Name: zkbdf_eval.c
Author: Tan Teik Guan
Description: Eval function for VDF realization using ZKBoo. Modified from MPC_SHA256.c
*/
/*
============================================================================
Name : MPC_SHA256.c
Author : Sobuno
Version : 0.1
Description : MPC SHA256 for one block only
============================================================================
*/
#include <stdbool.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/time.h>
#include "shared.h"
#include <math.h>
#include "omp.h"
#define CH(e,f,g) ((e & f) ^ ((~e) & g))
int totalRandom = 0;
int totalSha = 0;
int totalSS = 0;
int totalHash = 0;
int NUM_ROUNDS = 100;
uint32_t rand32() {
uint32_t x;
x = rand() & 0xff;
x |= (rand() & 0xff) << 8;
x |= (rand() & 0xff) << 16;
x |= (rand() & 0xff) << 24;
return x;
}
void printbits(uint32_t n) {
if (n) {
printbits(n >> 1);
printf("%d", n & 1);
}
}
void mpc_XOR(uint32_t x[3], uint32_t y[3], uint32_t z[3]) {
z[0] = x[0] ^ y[0];
z[1] = x[1] ^ y[1];
z[2] = x[2] ^ y[2];
}
void mpc_AND(uint32_t x[3], uint32_t y[3], uint32_t z[3], unsigned char *randomness[3], int* randCount, View views[3], int* countY) {
uint32_t r[3] = { getRandom32(randomness[0], *randCount), getRandom32(randomness[1], *randCount), getRandom32(randomness[2], *randCount)};
*randCount += 4;
uint32_t t[3] = { 0 };
t[0] = (x[0] & y[1]) ^ (x[1] & y[0]) ^ (x[0] & y[0]) ^ r[0] ^ r[1];
t[1] = (x[1] & y[2]) ^ (x[2] & y[1]) ^ (x[1] & y[1]) ^ r[1] ^ r[2];
t[2] = (x[2] & y[0]) ^ (x[0] & y[2]) ^ (x[2] & y[2]) ^ r[2] ^ r[0];
z[0] = t[0];
z[1] = t[1];
z[2] = t[2];
views[0].y[*countY] = z[0];
views[1].y[*countY] = z[1];
views[2].y[*countY] = z[2];
(*countY)++;
}
void mpc_NEGATE(uint32_t x[3], uint32_t z[3]) {
z[0] = ~x[0];
z[1] = ~x[1];
z[2] = ~x[2];
}
void mpc_ADD(uint32_t x[3], uint32_t y[3], uint32_t z[3], unsigned char *randomness[3], int* randCount, View views[3], int* countY) {
uint32_t c[3] = { 0 };
uint32_t r[3] = { getRandom32(randomness[0], *randCount), getRandom32(randomness[1], *randCount), getRandom32(randomness[2], *randCount)};
*randCount += 4;
uint8_t a[3], b[3];
uint8_t t;
for(int i=0;i<31;i++)
{
a[0]=GETBIT(x[0]^c[0],i);
a[1]=GETBIT(x[1]^c[1],i);
a[2]=GETBIT(x[2]^c[2],i);
b[0]=GETBIT(y[0]^c[0],i);
b[1]=GETBIT(y[1]^c[1],i);
b[2]=GETBIT(y[2]^c[2],i);
t = (a[0]&b[1]) ^ (a[1]&b[0]) ^ GETBIT(r[1],i);
SETBIT(c[0],i+1, t ^ (a[0]&b[0]) ^ GETBIT(c[0],i) ^ GETBIT(r[0],i));
t = (a[1]&b[2]) ^ (a[2]&b[1]) ^ GETBIT(r[2],i);
SETBIT(c[1],i+1, t ^ (a[1]&b[1]) ^ GETBIT(c[1],i) ^ GETBIT(r[1],i));
t = (a[2]&b[0]) ^ (a[0]&b[2]) ^ GETBIT(r[0],i);
SETBIT(c[2],i+1, t ^ (a[2]&b[2]) ^ GETBIT(c[2],i) ^ GETBIT(r[2],i));
}
z[0]=x[0]^y[0]^c[0];
z[1]=x[1]^y[1]^c[1];
z[2]=x[2]^y[2]^c[2];
views[0].y[*countY] = c[0];
views[1].y[*countY] = c[1];
views[2].y[*countY] = c[2];
*countY += 1;
}
void mpc_ADDK(uint32_t x[3], uint32_t y, uint32_t z[3], unsigned char *randomness[3], int* randCount, View views[3], int* countY) {
uint32_t c[3] = { 0 };
uint32_t r[3] = { getRandom32(randomness[0], *randCount), getRandom32(randomness[1], *randCount), getRandom32(randomness[2], *randCount)};
*randCount += 4;
uint8_t a[3], b[3];
uint8_t t;
for(int i=0;i<31;i++)
{
a[0]=GETBIT(x[0]^c[0],i);
a[1]=GETBIT(x[1]^c[1],i);
a[2]=GETBIT(x[2]^c[2],i);
b[0]=GETBIT(y^c[0],i);
b[1]=GETBIT(y^c[1],i);
b[2]=GETBIT(y^c[2],i);
t = (a[0]&b[1]) ^ (a[1]&b[0]) ^ GETBIT(r[1],i);
SETBIT(c[0],i+1, t ^ (a[0]&b[0]) ^ GETBIT(c[0],i) ^ GETBIT(r[0],i));
t = (a[1]&b[2]) ^ (a[2]&b[1]) ^ GETBIT(r[2],i);
SETBIT(c[1],i+1, t ^ (a[1]&b[1]) ^ GETBIT(c[1],i) ^ GETBIT(r[1],i));
t = (a[2]&b[0]) ^ (a[0]&b[2]) ^ GETBIT(r[0],i);
SETBIT(c[2],i+1, t ^ (a[2]&b[2]) ^ GETBIT(c[2],i) ^ GETBIT(r[2],i));
}
z[0]=x[0]^y^c[0];
z[1]=x[1]^y^c[1];
z[2]=x[2]^y^c[2];
views[0].y[*countY] = c[0];
views[1].y[*countY] = c[1];
views[2].y[*countY] = c[2];
*countY += 1;
}
int sha256(unsigned char* result, unsigned char* input, int numBits) {
uint32_t hA[8] = { 0x6a09e667, 0xbb67ae85, 0x3c6ef372, 0xa54ff53a,
0x510e527f, 0x9b05688c, 0x1f83d9ab, 0x5be0cd19 };
int remainingBits = numBits;
int chars;
int i;
while (remainingBits >= 0)
{
if (remainingBits > 447)
{
chars = 64;
remainingBits -= 512;
}
else
{
chars = remainingBits >> 3;
remainingBits = -1;
}
unsigned char* chunk = calloc(64, 1); //512 bits
memcpy(chunk, input, chars);
input += chars;
if (chars < 64)
{
chunk[chars] = 0x80;
chunk[60] = numBits >> 24;
chunk[61] = numBits >> 16;
chunk[62] = numBits >> 8;
chunk[63] = numBits;
}
uint32_t w[64];
for (i = 0; i < 16; i++) {
w[i] = (chunk[i * 4] << 24) | (chunk[i * 4 + 1] << 16)
| (chunk[i * 4 + 2] << 8) | chunk[i * 4 + 3];
}
uint32_t s0, s1;
for (i = 16; i < 64; i++) {
s0 = RIGHTROTATE(w[i - 15], 7) ^ RIGHTROTATE(w[i - 15], 18)
^ (w[i - 15] >> 3);
s1 = RIGHTROTATE(w[i - 2], 17) ^ RIGHTROTATE(w[i - 2], 19)
^ (w[i - 2] >> 10);
w[i] = w[i - 16] + s0 + w[i - 7] + s1;
}
uint32_t a, b, c, d, e, f, g, h, temp1, temp2, maj;
a = hA[0];
b = hA[1];
c = hA[2];
d = hA[3];
e = hA[4];
f = hA[5];
g = hA[6];
h = hA[7];
for (i = 0; i < 64; i++) {
s1 = RIGHTROTATE(e,6) ^ RIGHTROTATE(e, 11) ^ RIGHTROTATE(e, 25);
temp1 = h + s1 + CH(e, f, g) + k[i] + w[i];
s0 = RIGHTROTATE(a,2) ^ RIGHTROTATE(a, 13) ^ RIGHTROTATE(a, 22);
maj = (a & (b ^ c)) ^ (b & c);
temp2 = s0 + maj;
h = g;
g = f;
f = e;
e = d + temp1;
d = c;
c = b;
b = a;
a = temp1 + temp2;
}
hA[0] += a;
hA[1] += b;
hA[2] += c;
hA[3] += d;
hA[4] += e;
hA[5] += f;
hA[6] += g;
hA[7] += h;
}
for (i = 0; i < 8; i++) {
result[i * 4] = (hA[i] >> 24);
result[i * 4 + 1] = (hA[i] >> 16);
result[i * 4 + 2] = (hA[i] >> 8);
result[i * 4 + 3] = hA[i];
}
return 0;
}
void mpc_RIGHTROTATE(uint32_t x[], int i, uint32_t z[]) {
z[0] = RIGHTROTATE(x[0], i);
z[1] = RIGHTROTATE(x[1], i);
z[2] = RIGHTROTATE(x[2], i);
}
void mpc_RIGHTSHIFT(uint32_t x[3], int i, uint32_t z[3]) {
z[0] = x[0] >> i;
z[1] = x[1] >> i;
z[2] = x[2] >> i;
}
void mpc_MAJ(uint32_t a[], uint32_t b[3], uint32_t c[3], uint32_t z[3], unsigned char *randomness[3], int* randCount, View views[3], int* countY) {
uint32_t t0[3];
uint32_t t1[3];
mpc_XOR(a, b, t0);
mpc_XOR(a, c, t1);
mpc_AND(t0, t1, z, randomness, randCount, views, countY);
mpc_XOR(z, a, z);
}
void mpc_CH(uint32_t e[], uint32_t f[3], uint32_t g[3], uint32_t z[3], unsigned char *randomness[3], int* randCount, View views[3], int* countY) {
uint32_t t0[3];
//e & (f^g) ^ g
mpc_XOR(f,g,t0);
mpc_AND(e,t0,t0, randomness, randCount, views, countY);
mpc_XOR(t0,g,z);
}
int mpc_sha256(unsigned char* results[3], unsigned char inputs[3][BLOCK_SIZE], int numBits, int addView, uint32_t hA[8][3], unsigned char *randomness[3], int* randCount, View views[3], int* countY) {
/*
if (numBits > 447) {
printf("Input too long, aborting!");
return -1;
}
*/
int chars = numBits >> 3;
unsigned char* chunks[3];
uint32_t w[64][3];
uint32_t msg[MSG_SIZE/4];
/*
if (addMsg)
{
for (int j=0;j<(numBits/32);j++)
{
msg[j] = (addMsg[j*4]<<24) | (addMsg[j*4+1]<<16) | (addMsg[j*4+2] << 8) | (addMsg[j*4+3]);
}
}
*/
for (int i =0; i<64;i++)
{
w[i][0]=w[i][1]=w[i][2] = 0;
}
for (int i = 0; i < 3; i++) {
chunks[i] = calloc(64, 1); //512 bits
memcpy(chunks[i], inputs[i], BLOCK_SIZE /*chars*/);
/*
chunks[i][chars] = 0x80;
//Last 8 chars used for storing length of input without padding, in big-endian.
//Since we only care for one block, we are safe with just using last 9 bits and 0'ing the rest
chunk[60] = numBits >> 24;
chunk[61] = numBits >> 16;
chunks[i][62] = numBits >> 8;
chunks[i][63] = numBits;
*/
if (addView)
memcpy(views[i].x, chunks[i], 64);
for (int j = 0; j < 16; j++) {
w[j][i] = (chunks[i][j * 4] << 24) | (chunks[i][j * 4 + 1] << 16)
| (chunks[i][j * 4 + 2] << 8) | chunks[i][j * 4 + 3];
}
free(chunks[i]);
}
uint32_t s0[3], s1[3];
uint32_t t0[3], t1[3];
for (int j = 16; j < 64; j++) {
//s0[i] = RIGHTROTATE(w[i][j-15],7) ^ RIGHTROTATE(w[i][j-15],18) ^ (w[i][j-15] >> 3);
mpc_RIGHTROTATE(w[j-15], 7, t0);
mpc_RIGHTROTATE(w[j-15], 18, t1);
mpc_XOR(t0, t1, t0);
mpc_RIGHTSHIFT(w[j-15], 3, t1);
mpc_XOR(t0, t1, s0);
//s1[i] = RIGHTROTATE(w[i][j-2],17) ^ RIGHTROTATE(w[i][j-2],19) ^ (w[i][j-2] >> 10);
mpc_RIGHTROTATE(w[j-2], 17, t0);
mpc_RIGHTROTATE(w[j-2], 19, t1);
mpc_XOR(t0, t1, t0);
mpc_RIGHTSHIFT(w[j-2], 10, t1);
mpc_XOR(t0, t1, s1);
//w[i][j] = w[i][j-16]+s0[i]+w[i][j-7]+s1[i];
mpc_ADD(w[j-16], s0, t1, randomness, randCount, views, countY);
mpc_ADD(w[j-7], t1, t1, randomness, randCount, views, countY);
mpc_ADD(t1, s1, w[j], randomness, randCount, views, countY);
}
uint32_t a[3] = { hA[0][0],hA[0][1],hA[0][2] };
uint32_t b[3] = { hA[1][0],hA[1][1],hA[1][2] };
uint32_t c[3] = { hA[2][0],hA[2][1],hA[2][2] };
uint32_t d[3] = { hA[3][0],hA[3][1],hA[3][2] };
uint32_t e[3] = { hA[4][0],hA[4][1],hA[4][2] };
uint32_t f[3] = { hA[5][0],hA[5][1],hA[5][2] };
uint32_t g[3] = { hA[6][0],hA[6][1],hA[6][2] };
uint32_t h[3] = { hA[7][0],hA[7][1],hA[7][2] };
uint32_t temp1[3], temp2[3], maj[3];
for (int i = 0; i < 64; i++) {
//s1 = RIGHTROTATE(e,6) ^ RIGHTROTATE(e,11) ^ RIGHTROTATE(e,25);
mpc_RIGHTROTATE(e, 6, t0);
mpc_RIGHTROTATE(e, 11, t1);
mpc_XOR(t0, t1, t0);
mpc_RIGHTROTATE(e, 25, t1);
mpc_XOR(t0, t1, s1);
//ch = (e & f) ^ ((~e) & g);
//temp1 = h + s1 + CH(e,f,g) + k[i]+w[i];
//t0 = h + s1
mpc_ADD(h, s1, t0, randomness, randCount, views, countY);
mpc_CH(e, f, g, t1, randomness, randCount, views, countY);
//t1 = t0 + t1 (h+s1+ch)
mpc_ADD(t0, t1, t1, randomness, randCount, views, countY);
mpc_ADDK(t1, k[i], t1, randomness, randCount, views, countY);
mpc_ADD(t1, w[i], temp1, randomness, randCount, views, countY);
//s0 = RIGHTROTATE(a,2) ^ RIGHTROTATE(a,13) ^ RIGHTROTATE(a,22);
mpc_RIGHTROTATE(a, 2, t0);
mpc_RIGHTROTATE(a, 13, t1);
mpc_XOR(t0, t1, t0);
mpc_RIGHTROTATE(a, 22, t1);
mpc_XOR(t0, t1, s0);
mpc_MAJ(a, b, c, maj, randomness, randCount, views, countY);
//temp2 = s0+maj;
mpc_ADD(s0, maj, temp2, randomness, randCount, views, countY);
memcpy(h, g, sizeof(uint32_t) * 3);
memcpy(g, f, sizeof(uint32_t) * 3);
memcpy(f, e, sizeof(uint32_t) * 3);
//e = d+temp1;
mpc_ADD(d, temp1, e, randomness, randCount, views, countY);
memcpy(d, c, sizeof(uint32_t) * 3);
memcpy(c, b, sizeof(uint32_t) * 3);
memcpy(b, a, sizeof(uint32_t) * 3);
//a = temp1+temp2;
mpc_ADD(temp1, temp2, a, randomness, randCount, views, countY);
}
/*
uint32_t hHa[8][3] = { { hA[0],hA[0],hA[0] }, { hA[1],hA[1],hA[1] }, { hA[2],hA[2],hA[2] }, { hA[3],hA[3],hA[3] },
{ hA[4],hA[4],hA[4] }, { hA[5],hA[5],hA[5] }, { hA[6],hA[6],hA[6] }, { hA[7],hA[7],hA[7] } };
*/
uint32_t hHa[8][3];
mpc_ADD(hA[0], a, hHa[0], randomness, randCount, views, countY);
mpc_ADD(hA[1], b, hHa[1], randomness, randCount, views, countY);
mpc_ADD(hA[2], c, hHa[2], randomness, randCount, views, countY);
mpc_ADD(hA[3], d, hHa[3], randomness, randCount, views, countY);
mpc_ADD(hA[4], e, hHa[4], randomness, randCount, views, countY);
mpc_ADD(hA[5], f, hHa[5], randomness, randCount, views, countY);
mpc_ADD(hA[6], g, hHa[6], randomness, randCount, views, countY);
mpc_ADD(hA[7], h, hHa[7], randomness, randCount, views, countY);
for (int i = 0; i < 8; i++)
{
hA[i][0] = hHa[i][0];
hA[i][1] = hHa[i][1];
hA[i][2] = hHa[i][2];
}
for (int i = 0; i < 8; i++) {
mpc_RIGHTSHIFT(hHa[i], 24, t0);
results[0][i * 4] = t0[0];
results[1][i * 4] = t0[1];
results[2][i * 4] = t0[2];
mpc_RIGHTSHIFT(hHa[i], 16, t0);
results[0][i * 4 + 1] = t0[0];
results[1][i * 4 + 1] = t0[1];
results[2][i * 4 + 1] = t0[2];
mpc_RIGHTSHIFT(hHa[i], 8, t0);
results[0][i * 4 + 2] = t0[0];
results[1][i * 4 + 2] = t0[1];
results[2][i * 4 + 2] = t0[2];
results[0][i * 4 + 3] = hHa[i][0];
results[1][i * 4 + 3] = hHa[i][1];
results[2][i * 4 + 3] = hHa[i][2];
}
return 0;
}
int writeToFile(char filename[], void* data, int size, int numItems) {
FILE *file;
file = fopen(filename, "wb");
if (!file) {
printf("Unable to open file!");
return 1;
}
fwrite(data, size, numItems, file);
fclose(file);
return 0;
}
int secretShare(unsigned char* input, int numBytes, unsigned char output[3][numBytes]) {
if(RAND_bytes(output[0], numBytes) != 1) {
printf("RAND_bytes failed crypto, aborting\n");
}
if(RAND_bytes(output[1], numBytes) != 1) {
printf("RAND_bytes failed crypto, aborting\n");
}
for (int j = 0; j < numBytes; j++) {
output[2][j] = input[j] ^ output[0][j] ^ output[1][j];
}
return 0;
}
int mpc_hmac_sha256(unsigned char* results[3], unsigned char ek[3][BLOCK_SIZE], int numBytes, char * Cha, unsigned char *randomness[3], int* randCount, View views[3], int* countY)
{
unsigned char shares[3][BLOCK_SIZE];
uint32_t hA[8][3];
int i;
unsigned char* innerhash[3],*outerhash[3];
innerhash[0] = malloc(32);
innerhash[1] = malloc(32);
innerhash[2] = malloc(32);
outerhash[0] = malloc(32);
outerhash[1] = malloc(32);
outerhash[2] = malloc(32);
if (strlen(Cha) > MSG_SIZE)
{
printf("Input too long, aborting!");
return -1;
}
for (i=0;i<8;i++)
hA[i][0] = hA[i][1] = hA[i][2] = ihA[i];
memset(shares[0],0,sizeof(shares[0]));
memset(shares[1],0,sizeof(shares[1]));
memset(shares[2],0,sizeof(shares[2]));
for (i = 0; i < BLOCK_SIZE;i++)
{
shares[0][i] = ek[0][i] ^ 0x36;
shares[1][i] = ek[1][i] ^ 0x36;
shares[2][i] = ek[2][i] ^ 0x36;
}
mpc_sha256(innerhash, shares, 512, 0, hA, randomness, randCount, views, countY);
memset(shares[0],0,sizeof(shares[0]));
memset(shares[1],0,sizeof(shares[1]));
memset(shares[2],0,sizeof(shares[2]));
for (i = 0; i < strlen(Cha);i++)
{
shares[0][i] = Cha[i];
shares[1][i] = Cha[i];
shares[2][i] = Cha[i];
}
shares[0][strlen(Cha)] = shares[1][strlen(Cha)] = shares[2][strlen(Cha)] = 0x80;
shares[0][61] = shares[1][61] = shares[2][61] = (((strlen(Cha)* 8)+512) >> 16) & 0xFF;
shares[0][62] = shares[1][62] = shares[2][62] = (((strlen(Cha)* 8)+512) >> 8) & 0xFF;
shares[0][63] = shares[1][63] = shares[2][63] = ((strlen(Cha)* 8)+512) & 0xFF;
mpc_sha256(innerhash, shares, 512, 0, hA, randomness, randCount, views, countY);
for (i=0;i<8;i++)
hA[i][0] = hA[i][1] = hA[i][2] = ihA[i];
memset(shares,0,3*BLOCK_SIZE);
for (i = 0; i < BLOCK_SIZE;i++)
{
shares[0][i] = ek[0][i] ^ 0x5c;
shares[1][i] = ek[1][i] ^ 0x5c;
shares[2][i] = ek[2][i] ^ 0x5c;
}
mpc_sha256(outerhash, shares, 512, 0, hA, randomness, randCount, views, countY);
memset(shares,0,3*BLOCK_SIZE);
for (i = 0; i < 32;i++)
{
shares[0][i] = innerhash[0][i];
shares[1][i] = innerhash[1][i];
shares[2][i] = innerhash[2][i];
}
shares[0][32] = shares[1][32] = shares[2][32] = 0x80;
shares[0][62] = shares[1][62] = shares[2][62] = 3;
mpc_sha256(results, shares, 512, 0, hA, randomness, randCount, views, countY);
free(innerhash[0]);
free(innerhash[1]);
free(innerhash[2]);
free(outerhash[0]);
free(outerhash[1]);
free(outerhash[2]);
return 0;
}
a commit(int numBytes, unsigned char shares[3][BLOCK_SIZE], char * Cha, unsigned char *randomness[3], unsigned char rs[3][4], View views[3]) {
unsigned char* hashes[3];
hashes[0] = malloc(32);
hashes[1] = malloc(32);
hashes[2] = malloc(32);
int* randCount = calloc(1, sizeof(int));
int* countY = calloc(1, sizeof(int));
uint32_t hA[8][3];
int i;
for (i=0;i<8;i++)
hA[i][0] = hA[i][1] = hA[i][2] = ihA[i];
*countY = 0;
shares[0][numBytes] = shares[1][numBytes] = shares[2][numBytes] = 0x80;
shares[0][62] = shares[1][62] = shares[2][62] = ((numBytes * 8) >> 8) & 0xFF;
shares[0][63] = shares[1][63] = shares[2][63] = (numBytes * 8) & 0xFF;
mpc_sha256(hashes, shares, numBytes * 8, 1, hA, randomness, randCount, views, countY);
unsigned char * hmac[3];
hmac[0] = malloc(32);
hmac[1] = malloc(32);
hmac[2] = malloc(32);
shares[0][numBytes] = shares[1][numBytes] = shares[2][numBytes] = shares[0][62] = shares[1][62] = shares[2][62] = shares[0][63] = shares[1][63] = shares[2][63] = 0;
mpc_hmac_sha256(hmac, shares, numBytes, Cha, randomness, randCount, views, countY);
//Explicitly add y to view
free(randCount);
for(int i = 0; i<8; i++) {
views[0].y[*countY] = (hashes[0][i * 4] << 24) | (hashes[0][i * 4 + 1] << 16)
| (hashes[0][i * 4 + 2] << 8) | hashes[0][i * 4 + 3];
views[1].y[*countY] = (hashes[1][i * 4] << 24) | (hashes[1][i * 4 + 1] << 16)
| (hashes[1][i * 4 + 2] << 8) | hashes[1][i * 4 + 3];
views[2].y[*countY] = (hashes[2][i * 4] << 24) | (hashes[2][i * 4 + 1] << 16)
| (hashes[2][i * 4 + 2] << 8) | hashes[2][i * 4 + 3];
*countY += 1;
}
for(int i = 0; i<8; i++) {
views[0].y[*countY] = (hmac[0][i * 4] << 24) | (hmac[0][i * 4 + 1] << 16)
| (hmac[0][i * 4 + 2] << 8) | hmac[0][i * 4 + 3];
views[1].y[*countY] = (hmac[1][i * 4] << 24) | (hmac[1][i * 4 + 1] << 16)
| (hmac[1][i * 4 + 2] << 8) | hmac[1][i * 4 + 3];
views[2].y[*countY] = (hmac[2][i * 4] << 24) | (hmac[2][i * 4 + 1] << 16)
| (hmac[2][i * 4 + 2] << 8) | hmac[2][i * 4 + 3];
*countY += 1;
}
free(countY);
free(hashes[0]);
free(hashes[1]);
free(hashes[2]);
free(hmac[0]);
free(hmac[1]);
free(hmac[2]);
uint32_t* result11 = malloc(32);
uint32_t* result21 = malloc(32);
output(views[0], result11,result21);
uint32_t* result12 = malloc(32);
uint32_t* result22 = malloc(32);
output(views[1], result12, result22);
uint32_t* result13 = malloc(32);
uint32_t* result23 = malloc(32);
output(views[2], result13,result23);
a a;
memcpy(a.yp1[0], result11, 32);
memcpy(a.yp1[1], result12, 32);
memcpy(a.yp1[2], result13, 32);
memcpy(a.yp2[0], result21, 32);
memcpy(a.yp2[1], result22, 32);
memcpy(a.yp2[2], result23, 32);
free(result11);
free(result12);
free(result13);
free(result21);
free(result22);
free(result23);
return a;
}
z prove(int e, unsigned char keys[3][16], unsigned char rs[3][4], View views[3]) {
z z;
memcpy(z.ke, keys[e], 16);
memcpy(z.ke1, keys[(e + 1) % 3], 16);
z.ve = views[e];
z.ve1 = views[(e + 1) % 3];
memcpy(z.re, rs[e],4);
memcpy(z.re1, rs[(e + 1) % 3],4);
return z;
}
int GetNextSelected(int size,unsigned char * data, int *dataPtr)
{
int value=0;
int modulo = size;
while (size > 0)
{
value <<=8;
value += (int) data[*dataPtr];
size >>=8;
(*dataPtr)++;
}
if (!(value & 0x01)) // will return odd number
value++;
return (int) value % modulo;
}
Merkle * BuildMerkleTree(int NumRounds,z * zs)
{
int i;
Merkle * tempNode;
Merkle * startNode = NULL;
Merkle * childNode;
Merkle * prevNode;
int done = 0;
int odd = 0;
unsigned char datablock[64];
if ((!zs) || (NumRounds < 2))
return NULL;
prevNode = NULL;
for (i=0; i < NumRounds;i++)
{
tempNode = malloc(sizeof(Merkle));
if (i==0)
startNode = tempNode;
sha256(tempNode->data,(unsigned char *)&(zs[i]),sizeof(z) * 8);
tempNode->parent = NULL;
tempNode->type = 0;
tempNode->next = NULL;
tempNode->previous = prevNode;
if (prevNode)
prevNode->next = tempNode;
if (!odd)
{
tempNode->sibling = NULL;
odd = 1;
}
else
{
prevNode->sibling = tempNode;
tempNode->sibling = prevNode;
odd = 0;
}
prevNode = tempNode;
}
while (!done)
{
childNode = startNode;
while (childNode->parent)
childNode = childNode->parent;
if (!childNode->sibling)
{
done = 1;
continue;
}
odd = 0;
prevNode = NULL;
while (childNode != NULL)
{
tempNode = malloc(sizeof(Merkle));
tempNode->type = 1;
childNode->parent = tempNode;
tempNode->previous = prevNode;
if (prevNode)
prevNode->next = tempNode;
tempNode->next = NULL;
tempNode->parent = NULL;
if (!odd)
{
tempNode->sibling = NULL;
odd = 1;
}
else
{
prevNode->sibling = tempNode;
tempNode->sibling = prevNode;
odd = 0;
}
if (childNode->sibling)
{
childNode->sibling->parent = tempNode;
memcpy(datablock,childNode->data,32);
memcpy(&(datablock[32]),childNode->sibling->data,32);
sha256(tempNode->data,datablock,64*8);
childNode = childNode->sibling->next;
}
else
{
memset(datablock,0,sizeof(datablock));
memcpy(datablock,childNode->data,32);
sha256(tempNode->data,datablock,64*8);
childNode = childNode->sibling;
}
prevNode = tempNode;
}
}
return startNode;
}
void DestroyMerkleTree(Merkle * startNode)
{
Merkle * tempNode;
if (startNode->parent)
DestroyMerkleTree(startNode->parent);
startNode->parent = NULL;
while (startNode)
{
tempNode = startNode->next;
free(startNode);
startNode = tempNode;
}
return;
}
#define NUM_LOOPS 1
int main(int argc, char * argv[]) {
setbuf(stdout, NULL);
srand((unsigned) time(NULL));
init_EVP();
openmp_thread_setup();
char CHALLENGE[BLOCK_SIZE];
char ek[BLOCK_SIZE]; //eval key is 447 bits
//
if (argc != 4)
{
printf("Usage: %s <number of rounds (e.g. 20, 40, 60, 80, 100)> <challenge (Max %d char)> <eval key (Max %d char)>\n",argv[0],MSG_SIZE,MSG_SIZE);
return -1;
}
NUM_ROUNDS = atoi(argv[1]);
if ((NUM_ROUNDS & 0x01) || (NUM_ROUNDS < 4))
{
printf("Number of rounds should be even and > 4\n");
return -1;
}
unsigned char garbage[4];
if(RAND_bytes(garbage, 4) != 1) {
printf("RAND_bytes failed crypto, aborting\n");
return 0;
}
memset(CHALLENGE,0,sizeof(CHALLENGE));
strncpy(CHALLENGE,argv[2],MSG_SIZE); //55 is max length as we only support 447 bits = 55.875 bytes
memset(ek,0,sizeof(ek));
strncpy(ek,argv[3],MSG_SIZE);
int i = strlen(ek);
printf("ek length: %d\n", i);
printf("Iterations of ZKBdf: %d\n", NUM_ROUNDS);
unsigned char input[BLOCK_SIZE]; // 512 bits
memset(input,0,sizeof(input));
memcpy(input,ek,sizeof(input));
struct timeval begin, delta;
gettimeofday(&begin,NULL);
unsigned char rs[NUM_ROUNDS][3][4];
unsigned char keys[NUM_ROUNDS][3][16];
a as[NUM_ROUNDS];
View localViews[NUM_ROUNDS][3];
int totalCrypto = 0;
z* zs;
for(int loops=0;loops<NUM_LOOPS;loops++)
{
//Generating keys
if(RAND_bytes((unsigned char *) keys, NUM_ROUNDS*3*16) != 1) {
printf("RAND_bytes failed crypto, aborting\n");
return 0;
}
if(RAND_bytes((unsigned char *)rs, NUM_ROUNDS*3*4) != 1) {
printf("RAND_bytes failed crypto, aborting\n");
return 0;
}
//Sharing secrets
unsigned char shares[NUM_ROUNDS][3][BLOCK_SIZE];
memset(shares,0,NUM_ROUNDS*3*BLOCK_SIZE);
if(RAND_bytes((unsigned char *)shares, NUM_ROUNDS*3*BLOCK_SIZE) != 1) {
printf("RAND_bytes failed crypto, aborting\n");
return 0;
}
#pragma omp parallel for
for(int k=0; k<NUM_ROUNDS; k++) {
for (int j = 0; j < i; j++) {
shares[k][2][j] = input[j] ^ shares[k][0][j] ^ shares[k][1][j];
}
for (int j = i; j < BLOCK_SIZE; j++) {
shares[k][2][j] = shares[k][0][j] = shares[k][1][j] = 0;
}
}
unsigned char *randomness[NUM_ROUNDS][3];
int es[NUM_ROUNDS];
uint32_t finalHash1[8];
uint32_t finalHash2[8];
zs = malloc(sizeof(z)*NUM_ROUNDS);
int r;
for (r=0;r<NUM_ROUNDS;r++)
{
unsigned char plaintext[16];
memset(plaintext,0x30,sizeof(plaintext));
if (r!=0)
{
SHA256_CTX ctx;
unsigned char prevroundhash[SHA256_DIGEST_LENGTH];
SHA256_Init(&ctx);
SHA256_Update(&ctx, &(zs[r-1]), sizeof(z));
SHA256_Final(prevroundhash, &ctx);
memcpy(plaintext,prevroundhash,sizeof(plaintext));
}
//Generating randomness
// #pragma omp parallel for
// for(int k=0; k<(NUM_ROUNDS); k++) {
for(int j = 0; j<3; j++) {
randomness[r][j] = malloc((ySize*4)*sizeof(unsigned char));
getAllRandomness(keys[r][j], plaintext, randomness[r][j]);
}
// }
//Running MPC-SHA2
// #pragma omp parallel for
// for(int k=0; k<NUM_ROUNDS; k++) {
as[r] = commit(i, shares[r], CHALLENGE, randomness[r], rs[r], localViews[r]);
for(int j=0; j<3; j++) {
free(randomness[r][j]);
}
// }
//Committing
// #pragma omp parallel for
// for(int k=0; k<(NUM_ROUNDS); k++) {
unsigned char hash1[SHA256_DIGEST_LENGTH];