C++ (Cpp) aes_gcm_init_hash_subkeyの例

コード例 #1

ファイル: aes-gcm.c プロジェクト: michaeljclark/aes-gcm

/**
 * aes_gcm_ad - GCM-AD_K(IV, C, A, T)
 */
int aes_gcm_ad(const aes_uchar *key, size_t key_len, const aes_uchar *iv, size_t iv_len,
	       const aes_uchar *crypt, size_t crypt_len,
	       const aes_uchar *aad, size_t aad_len, const aes_uchar *tag, aes_uchar *plain)
{
	aes_uchar H[AES_BLOCK_SIZE];
	aes_uchar J0[AES_BLOCK_SIZE];
	aes_uchar S[16], T[16];
	void *aes;

	aes = aes_gcm_init_hash_subkey(key, key_len, H);
	if (aes == NULL)
		return -1;

	aes_gcm_prepare_j0(iv, iv_len, H, J0);

	/* P = GCTR_K(inc_32(J_0), C) */
	aes_gcm_gctr(aes, J0, crypt, crypt_len, plain);

	aes_gcm_ghash(H, aad, aad_len, crypt, crypt_len, S);

	/* T' = MSB_t(GCTR_K(J_0, S)) */
	aes_gctr(aes, J0, S, sizeof(S), T);

	aes_encrypt_deinit(aes);

	if (memcmp(tag, T, 16) != 0) {
		aes_printf(MSG_EXCESSIVE, "GCM: Tag mismatch");
		return -1;
	}

	return 0;
}

コード例 #2

ファイル: aes-gcm.c プロジェクト: DamonHD/OpenTRV

/**
 * aes_gcm_ae - GCM-AE_K(IV, P, A)
 */
int aes_gcm_ae(
           void *aes, // DHD20150614
           const u8 *key, size_t key_len, const u8 *iv, size_t iv_len,
	       const u8 *plain, size_t plain_len,
	       const u8 *aad, size_t aad_len, u8 *crypt, u8 *tag)
{
	u8 H[AES_BLOCK_SIZE];
	u8 J0[AES_BLOCK_SIZE];
	u8 S[16];
//	void *aes;

//	aes =
	aes_gcm_init_hash_subkey(
			aes, // DHD20150614
			key, key_len, H);
//	if (aes == NULL)
//		return -1;

	aes_gcm_prepare_j0(iv, iv_len, H, J0);

	/* C = GCTR_K(inc_32(J_0), P) */
	aes_gcm_gctr(aes, J0, plain, plain_len, crypt);

	aes_gcm_ghash(H, aad, aad_len, crypt, plain_len, S);

	/* T = MSB_t(GCTR_K(J_0, S)) */
	aes_gctr(aes, J0, S, sizeof(S), tag);

	/* Return (C, T) */

	aes_encrypt_deinit(aes);

	return 0;
}

コード例 #3

ファイル: aes-gcm.c プロジェクト: michaeljclark/aes-gcm

/**
 * aes_gcm_ae - GCM-AE_K(IV, P, A)
 */
int aes_gcm_ae(const aes_uchar *key, size_t key_len, const aes_uchar *iv, size_t iv_len,
	       const aes_uchar *plain, size_t plain_len,
	       const aes_uchar *aad, size_t aad_len, aes_uchar *crypt, aes_uchar *tag)
{
	aes_uchar H[AES_BLOCK_SIZE];
	aes_uchar J0[AES_BLOCK_SIZE];
	aes_uchar S[16];
	void *aes;

	aes = aes_gcm_init_hash_subkey(key, key_len, H);
	if (aes == NULL)
		return -1;

	aes_gcm_prepare_j0(iv, iv_len, H, J0);

	/* C = GCTR_K(inc_32(J_0), P) */
	aes_gcm_gctr(aes, J0, plain, plain_len, crypt);

	aes_gcm_ghash(H, aad, aad_len, crypt, plain_len, S);

	/* T = MSB_t(GCTR_K(J_0, S)) */
	aes_gctr(aes, J0, S, sizeof(S), tag);

	/* Return (C, T) */

	aes_encrypt_deinit(aes);

	return 0;
}

コード例 #4

ファイル: aes-gcm.c プロジェクト: DamonHD/OpenTRV

/**
 * aes_gcm_ad - GCM-AD_K(IV, C, A, T)
 */
int aes_gcm_ad(
		   void *aes, // DHD20150614
		   const u8 *key, size_t key_len, const u8 *iv, size_t iv_len,
	       const u8 *crypt, size_t crypt_len,
	       const u8 *aad, size_t aad_len, const u8 *tag, u8 *plain)
{
	u8 H[AES_BLOCK_SIZE];
	u8 J0[AES_BLOCK_SIZE];
	u8 S[16], T[16];
//	void *aes;

//	aes =
	aes_gcm_init_hash_subkey(
			aes, // DHD20150614
			key, key_len, H);
//	if (aes == NULL)
//		return -1;

	aes_gcm_prepare_j0(iv, iv_len, H, J0);

	/* P = GCTR_K(inc_32(J_0), C) */
	aes_gcm_gctr(aes, J0, crypt, crypt_len, plain);

	aes_gcm_ghash(H, aad, aad_len, crypt, crypt_len, S);

	/* T' = MSB_t(GCTR_K(J_0, S)) */
	aes_gctr(aes, J0, S, sizeof(S), T);

	aes_encrypt_deinit(aes);

	if (os_memcmp_const(tag, T, 16) != 0) {
		/* printf("GCM: Tag mismatch\n"); */
		return -1;
	}

	return 0;
}