cwyang/aes_gcm.c

## aes_gcm.c
// src/plugins/crypto_native/aes_gcm.c

static void test_aes_gcm()
{
  u8 src[32] = {0}, dst[32] = {0}, check[32] = {0};
  u8 aad[32] = {0}, iv[12] = {0}, tag[16] = {0}, key[32];
  aes_key_size_t ks = AES_KEY_256;
  aes_gcm_key_data_t kd;

  // prepare key
  for (int i = 0; i < 32; i++)
    key[i] = i;
  clib_aes_gcm_key_expand (&kd, key, ks);

  for (i32 len = 32; len >= 0; len -= 16)
    {
      clib_warning("testing for len %d", len);
      aes_gcm (src, dst,
               aad, iv, tag, len, 32, 16,
               &kd, AES_KEY_ROUNDS (ks),
               AES_GCM_OP_ENCRYPT);
      int rv = aes_gcm (dst, check,
                        aad, iv, tag, len, 32, 16,
                        &kd, AES_KEY_ROUNDS (ks),
                        AES_GCM_OP_DECRYPT);
      int rv2 = memcmp(src, check, len);
      ASSERT(rv2 == 0);
      ASSERT(rv != 0);
      clib_warning("testing for len %d OK!", len);
    }
}

...

crypto_native aes_gcm_init() {
    crypto_native_main_t *cm = &crypto_native_main;

    test_aes_gcm();
    ...
}
	// src/plugins/crypto_native/aes_gcm.c

	static void test_aes_gcm()
	{
	u8 src[32] = {0}, dst[32] = {0}, check[32] = {0};
	u8 aad[32] = {0}, iv[12] = {0}, tag[16] = {0}, key[32];
	aes_key_size_t ks = AES_KEY_256;
	aes_gcm_key_data_t kd;

	// prepare key
	for (int i = 0; i < 32; i++)
	key[i] = i;
	clib_aes_gcm_key_expand (&kd, key, ks);

	for (i32 len = 32; len >= 0; len -= 16)
	{
	clib_warning("testing for len %d", len);
	aes_gcm (src, dst,
	aad, iv, tag, len, 32, 16,
	&kd, AES_KEY_ROUNDS (ks),
	AES_GCM_OP_ENCRYPT);
	int rv = aes_gcm (dst, check,
	aad, iv, tag, len, 32, 16,
	&kd, AES_KEY_ROUNDS (ks),
	AES_GCM_OP_DECRYPT);
	int rv2 = memcmp(src, check, len);
	ASSERT(rv2 == 0);
	ASSERT(rv != 0);
	clib_warning("testing for len %d OK!", len);
	}
	}

	...

	crypto_native aes_gcm_init() {
	crypto_native_main_t *cm = &crypto_native_main;

	test_aes_gcm();
	...
	}