enclave.cpp

int ecall_show_wallet(const char* master_password, wallet_t* wallet, size_t wallet_size) {

	//
	// OVERVIEW: 
	//	1. [ocall] load wallet
	// 	2. unseal wallet
	//	3. verify master-password
	//	4. return wallet to app
	//	5. exit enclave
	//
	//
	sgx_status_t ocall_status, sealing_status;
	int ocall_ret;



	// 1. load wallet
	size_t sealed_size = sizeof(sgx_sealed_data_t) + sizeof(wallet_t);
	uint8_t* sealed_data = (uint8_t*)malloc(sealed_size);
	ocall_status = ocall_load_wallet(&ocall_ret, sealed_data, sealed_size);
	if (ocall_ret != 0 || ocall_status != SGX_SUCCESS) {
		free(sealed_data);
		return ERR_CANNOT_LOAD_WALLET;
	}


	// 2. unseal loaded wallet
	uint32_t plaintext_size = sizeof(wallet_t);
    wallet_t* unsealed_wallet = (wallet_t*)malloc(plaintext_size);
    sealing_status = unseal_wallet((sgx_sealed_data_t*)sealed_data, unsealed_wallet, plaintext_size);
    free(sealed_data);
    if (sealing_status != SGX_SUCCESS) {
		free(unsealed_wallet);
		return ERR_FAIL_UNSEAL;
    }
    
    
	// 3. verify master-password
	if (strcmp(unsealed_wallet->master_password, master_password) != 0) {
		free(unsealed_wallet);
		return ERR_WRONG_MASTER_PASSWORD;
	}


	// 4. return wallet to app
	(* wallet) = *unsealed_wallet;
	free(unsealed_wallet);


	// 5. exit enclave
	return RET_SUCCESS;
}