all repos — TinyCrypT @ a2a1d74db0953d9f68d7cd1e8d62d50f0ac3c0d0

Short and sweet classical cryptographic primitives

test.c (view raw)

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#include "tinycrypt/x25519.h"
#include <stdint.h>
#include <stdio.h>

int
main (int argc, char **argv)
{
  const uint8_t SCALAR[]
      = { 0x4b, 0x66, 0xe9, 0xd4, 0xd1, 0xb4, 0x67, 0x3c, 0x5a, 0xd2, 0x26,
          0x91, 0x95, 0x7d, 0x6a, 0xf5, 0xc1, 0x1b, 0x64, 0x21, 0xe0, 0xea,
          0x01, 0xd4, 0x2c, 0xa4, 0x16, 0x9e, 0x79, 0x18, 0xba, 0x0d };
  const uint8_t U[]
      = { 0xe5, 0x21, 0x0f, 0x12, 0x78, 0x68, 0x11, 0xd3, 0xf4, 0xb7, 0x95,
          0x9d, 0x05, 0x38, 0xae, 0x2c, 0x31, 0xdb, 0xe7, 0x10, 0x6f, 0xc0,
          0x3c, 0x3e, 0xfc, 0x4c, 0xd5, 0x49, 0xc7, 0x15, 0xa4, 0x93 };
  const uint8_t EXPECTED[]
      = { 0x95, 0xcb, 0xde, 0x94, 0x76, 0xe8, 0x90, 0x7d, 0x7a, 0xad, 0xe4,
          0x5c, 0xb4, 0xb8, 0x73, 0xf8, 0x8b, 0x59, 0x5a, 0x68, 0x79, 0x9f,
          0xa1, 0x52, 0xe6, 0xf8, 0xf7, 0x64, 0x7a, 0xac, 0x79, 0x57 };
  uint8_t actual[sizeof (EXPECTED)];
  tct_x25519 (SCALAR, U, actual);
  for (unsigned int i = 0; i < sizeof (actual); ++i)
    {
      printf ("%02x", actual[i]);
    }
  printf ("\n");

  for (unsigned int i = 0; i < sizeof (actual); ++i)
    {
      printf ("%02x", EXPECTED[i]);
    }
  printf ("\n");
  return 0;
}