Add test vector for Curve25519 from RFC7748

  ;

}

static void

test_crypto_curve25519_testvec(void *arg)

{

  (void)arg;

  char *mem_op_hex_tmp = NULL;

  /* From RFC 7748, section 6.1 */

  /* Alice's private key, a: */

  const char a16[] =

    "77076d0a7318a57d3c16c17251b26645df4c2f87ebc0992ab177fba51db92c2a";

  /* Alice's public key, X25519(a, 9): */

  const char a_pub16[] =

    "8520f0098930a754748b7ddcb43ef75a0dbf3a0d26381af4eba4a98eaa9b4e6a";

  /* Bob's private key, b: */

  const char b16[] =

    "5dab087e624a8a4b79e17f8b83800ee66f3bb1292618b6fd1c2f8b27ff88e0eb";

  /* Bob's public key, X25519(b, 9): */

  const char b_pub16[] =

    "de9edb7d7b7dc1b4d35b61c2ece435373f8343c85b78674dadfc7e146f882b4f";

  /* Their shared secret, K: */

  const char k16[] =

    "4a5d9d5ba4ce2de1728e3bf480350f25e07e21c947d19e3376f09b3c1e161742";

  uint8_t a[32], b[32], a_pub[32], b_pub[32], k1[32], k2[32];

  base16_decode((char*)a, sizeof(a), a16, strlen(a16));

  base16_decode((char*)b, sizeof(b), b16, strlen(b16));

  curve25519_basepoint_impl(a_pub, a);

  curve25519_basepoint_impl(b_pub, b);

  curve25519_impl(k1, a, b_pub);

  curve25519_impl(k2, b, a_pub);

  test_memeq_hex(a, a16);

  test_memeq_hex(b, b16);

  test_memeq_hex(a_pub, a_pub16);

  test_memeq_hex(b_pub, b_pub16);

  test_memeq_hex(k1, k16);

  test_memeq_hex(k2, k16);

 done:

  tor_free(mem_op_hex_tmp);

}

static void

test_crypto_curve25519_wrappers(void *arg)

{

  { "hkdf_sha256", test_crypto_hkdf_sha256, 0, NULL, NULL },

  { "curve25519_impl", test_crypto_curve25519_impl, 0, NULL, NULL },

  { "curve25519_impl_hibit", test_crypto_curve25519_impl, 0, NULL, (void*)"y"},

  { "curve25516_testvec", test_crypto_curve25519_testvec, 0, NULL, NULL },

  { "curve25519_basepoint",

    test_crypto_curve25519_basepoint, TT_FORK, NULL, NULL },

  { "curve25519_wrappers", test_crypto_curve25519_wrappers, 0, NULL, NULL },