libsodium/test/default/scalarmult7.c

#include <stdio.h>
#include <string.h>
#define TEST_NAME "scalarmult7"
#include "cmptest.h"

unsigned char p1[32] = {
    0x72, 0x20, 0xf0, 0x09, 0x89, 0x30, 0xa7, 0x54,
    0x74, 0x8b, 0x7d, 0xdc, 0xb4, 0x3e, 0xf7, 0x5a,
    0x0d, 0xbf, 0x3a, 0x0d, 0x26, 0x38, 0x1a, 0xf4,
    0xeb, 0xa4, 0xa9, 0x8e, 0xaa, 0x9b, 0x4e, 0xea
};

unsigned char p2[32] = {
    0x85, 0x20, 0xf0, 0x09, 0x89, 0x30, 0xa7, 0x54,
    0x74, 0x8b, 0x7d, 0xdc, 0xb4, 0x3e, 0xf7, 0x5a,
    0x0d, 0xbf, 0x3a, 0x0d, 0x26, 0x38, 0x1a, 0xf4,
    0xeb, 0xa4, 0xa9, 0x8e, 0xaa, 0x9b, 0x4e, 0x6a
};

unsigned char scalar[32];
unsigned char out1[32];
unsigned char out2[32];

int main(void)
{
  int i;

  scalar[0] = 1U;
  crypto_scalarmult_curve25519(out1, scalar, p1);
  crypto_scalarmult_curve25519(out2, scalar, p2);
  printf("%d\n", memcmp(out1, out2, sizeof out1));

  return 0;
}