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#include <string.h>
#include "test.h"
#include "amcl/schnorr.h"
/* Schnorr's Proof challenge unit test */
#define LINE_LEN 256
#define IDLEN 16
#define ADLEN 16
int main(int argc, char **argv)
if (argc != 2)
printf("usage: ./test_schnorr_challenge [path to test vector file]\n");
int test_run = 0;
FILE *fp;
char line[LINE_LEN] = {0};
const char *TESTline = "TEST = ";
int testNo = 0;
char v[SFS_SECP256K1+1];
octet V = {0, sizeof(v), v};
const char *Vline = "V = ";
char id[IDLEN];
octet ID = {0, sizeof(id), id};
const char *IDline = "ID = ";
char ad[ADLEN];
octet AD = {0, sizeof(ad), ad};
octet *AD_ptr = NULL;
const char *ADline = "AD = ";
char c[SFS_SECP256K1+1];
octet C = {0, sizeof(c), c};
const char *Cline = "C = ";
char e_golden[SGS_SECP256K1];
octet E_GOLDEN = {0, sizeof(e_golden), e_golden};
const char *Eline = "E = ";
char e[SGS_SECP256K1];
octet E = {0, sizeof(e), e};
// Line terminating a test vector
const char *last_line = ADline;
/* Test happy path using test vectors */
fp = fopen(argv[1], "r");
if (fp == NULL)
printf("ERROR opening test vector file\n");
while (fgets(line, LINE_LEN, fp) != NULL)
scan_int(&testNo, line, TESTline);
// Read ID and AD
scan_OCTET(fp, &ID, line, IDline);
scan_OCTET(fp, &AD, line, ADline);
// Read inputs
scan_OCTET(fp, &V, line, Vline);
scan_OCTET(fp, &C, line, Cline);
// Read ground truth
scan_OCTET(fp, &E_GOLDEN, line, Eline);
if (!strncmp(line, last_line, strlen(last_line)))
// Also input AD if it is not empty
if (AD.len > 0)
AD_ptr = &AD;
SCHNORR_challenge(&V, &C, &ID, AD_ptr, &E);
compare_OCT(fp, testNo, "SCHNORR_challenge", &E, &E_GOLDEN);
// Mark that at least one test vector was executed
test_run = 1;
// Restore AD_ptr
AD_ptr = NULL;
if (test_run == 0)
printf("ERROR no test vector was executed\n");