Function ccp_configure_session_aead

dpdk/drivers/crypto/ccp/ccp_crypto.c:1105–1166

}

static int
ccp_configure_session_aead(struct ccp_session *sess,
			   const struct rte_crypto_sym_xform *xform)
{
	const struct rte_crypto_aead_xform *aead_xform = NULL;
	size_t i;

	aead_xform = &xform->aead;

	sess->cipher.key_length = aead_xform->key.length;
	rte_memcpy(sess->cipher.key, aead_xform->key.data,
		   aead_xform->key.length);

	if (aead_xform->op == RTE_CRYPTO_AEAD_OP_ENCRYPT) {
		sess->cipher.dir = CCP_CIPHER_DIR_ENCRYPT;
		sess->auth.op = CCP_AUTH_OP_GENERATE;
	} else {
		sess->cipher.dir = CCP_CIPHER_DIR_DECRYPT;
		sess->auth.op = CCP_AUTH_OP_VERIFY;
	}
	sess->aead_algo = aead_xform->algo;
	sess->auth.aad_length = aead_xform->aad_length;
	sess->auth.digest_length = aead_xform->digest_length;

	/* set iv parameters */
	sess->iv.offset = aead_xform->iv.offset;
	sess->iv.length = aead_xform->iv.length;

	switch (aead_xform->algo) {
	case RTE_CRYPTO_AEAD_AES_GCM:
		sess->cipher.algo = CCP_CIPHER_ALGO_AES_GCM;
		sess->cipher.um.aes_mode = CCP_AES_MODE_GCTR;
		sess->cipher.engine = CCP_ENGINE_AES;
		if (sess->cipher.key_length == 16)
			sess->cipher.ut.aes_type = CCP_AES_TYPE_128;
		else if (sess->cipher.key_length == 24)
			sess->cipher.ut.aes_type = CCP_AES_TYPE_192;
		else if (sess->cipher.key_length == 32)
			sess->cipher.ut.aes_type = CCP_AES_TYPE_256;
		else {
			CCP_LOG_ERR("Invalid aead key length");
			return -1;
		}
		for (i = 0; i < sess->cipher.key_length; i++)
			sess->cipher.key_ccp[sess->cipher.key_length - i - 1] =
				sess->cipher.key[i];
		sess->auth.algo = CCP_AUTH_ALGO_AES_GCM;
		sess->auth.engine = CCP_ENGINE_AES;
		sess->auth.um.aes_mode = CCP_AES_MODE_GHASH;
		sess->auth.ctx_len = CCP_SB_BYTES;
		sess->auth.offset = 0;
		sess->auth.block_size = AES_BLOCK_SIZE;
		sess->cmd_id = CCP_CMD_COMBINED;
		break;
	default:
		CCP_LOG_ERR("Unsupported aead algo");
		return -ENOTSUP;
	}