deployments/attestation/common/attestation_sp.c

/*
 * Copyright (c) 2021, Arm Limited and Contributors. All rights reserved.
 *
 * SPDX-License-Identifier: BSD-3-Clause
 */

#include <rpc/ffarpc/endpoint/ffarpc_call_ep.h>
#include <protocols/rpc/common/packed-c/status.h>
#include <config/ramstore/config_ramstore.h>
#include <config/loader/sp/sp_config_loader.h>
#include <service/attestation/provider/attest_provider.h>
#include <service/attestation/provider/serializer/packed-c/packedc_attest_provider_serializer.h>
#include <service/attestation/claims/claims_register.h>
#include <service/attestation/claims/sources/event_log/event_log_claim_source.h>
#include <service/attestation/claims/sources/boot_seed_generator/boot_seed_generator.h>
#include <service/attestation/claims/sources/null_lifecycle/null_lifecycle_claim_source.h>
#include <service/attestation/claims/sources/instance_id/instance_id_claim_source.h>
#include <service/attestation/claims/sources/implementation_id/implementation_id_claim_source.h>
#include <service/attestation/key_mngr/local/local_attest_key_mngr.h>
#include <service/crypto/client/psa/psa_crypto_client.h>
#include <service_locator.h>
#include <psa/crypto.h>
#include <ffa_api.h>
#include <sp_api.h>
#include <sp_rxtx.h>
#include <trace.h>

uint16_t own_id = 0; /* !!Needs refactoring as parameter to ffarpc_caller_init */


static int sp_init(uint16_t *own_sp_id);
static void locate_crypto_service(void);

void __noreturn sp_main(struct ffa_init_info *init_info)
{
	/* Service provider objects */
	struct attest_provider attest_provider;
	struct rpc_interface *attest_iface;
	struct ffa_call_ep ffarpc_call_ep;
	struct sp_msg req_msg;

	/* Claim source objects */
	struct claim_source *claim_source;
	struct event_log_claim_source event_log_claim_source;
	struct boot_seed_generator boot_seed_claim_source;
	struct null_lifecycle_claim_source lifecycle_claim_source;
	struct instance_id_claim_source instance_id_claim_source;
	struct implementation_id_claim_source implementation_id_claim_source;

	/*********************************************************
	 * Boot phase
	 *********************************************************/
	if (sp_init(&own_id) != 0) goto fatal_error;

	config_ramstore_init();
	sp_config_load(init_info);

	/**
	 * Locate crypto service endpoint and establish RPC session
	 */
	locate_crypto_service();

	/**
	 * Register claim sources for deployment
	 */
	claims_register_init();

	/* Boot measurement claim source */
	claim_source = event_log_claim_source_init_from_config(&event_log_claim_source);
	claims_register_add_claim_source(CLAIM_CATEGORY_BOOT_MEASUREMENT, claim_source);

	/* Boot seed claim source */
	claim_source = boot_seed_generator_init(&boot_seed_claim_source);
	claims_register_add_claim_source(CLAIM_CATEGORY_DEVICE, claim_source);

	/* Lifecycle state claim source */
	claim_source = null_lifecycle_claim_source_init(&lifecycle_claim_source);
	claims_register_add_claim_source(CLAIM_CATEGORY_DEVICE, claim_source);

	/* Instance ID claim source */
	claim_source = instance_id_claim_source_init(&instance_id_claim_source);
	claims_register_add_claim_source(CLAIM_CATEGORY_DEVICE, claim_source);

		/* Implementation ID claim source */
	claim_source = implementation_id_claim_source_init(&implementation_id_claim_source,
		"trustedfirmware.org.ts.attestation_sp");
	claims_register_add_claim_source(CLAIM_CATEGORY_DEVICE, claim_source);

	/**
	 * Initialize the service provider
	 */
	local_attest_key_mngr_init(LOCAL_ATTEST_KEY_MNGR_VOLATILE_IAK);
	attest_iface = attest_provider_init(&attest_provider);

	attest_provider_register_serializer(&attest_provider,
		TS_RPC_ENCODING_PACKED_C, packedc_attest_provider_serializer_instance());

	ffa_call_ep_init(&ffarpc_call_ep, attest_iface);

	/*********************************************************
	 * End of boot phase
	 *********************************************************/
	sp_msg_wait(&req_msg);

	while (1) {

		struct sp_msg resp_msg;

		ffa_call_ep_receive(&ffarpc_call_ep, &req_msg, &resp_msg);

		resp_msg.source_id = req_msg.destination_id;
		resp_msg.destination_id = req_msg.source_id;

		sp_msg_send_direct_resp(&resp_msg, &req_msg);
	}

fatal_error:
	/* SP is not viable */
	EMSG("Attestation SP error");
	while (1) {}
}

void sp_interrupt_handler(uint32_t interrupt_id)
{
	(void)interrupt_id;
}

static int sp_init(uint16_t *own_sp_id)
{
	int status = -1;
	ffa_result ffa_res;
	sp_result sp_res;
	static uint8_t tx_buffer[4096] __aligned(4096);
	static uint8_t rx_buffer[4096] __aligned(4096);

	sp_res = sp_rxtx_buffer_map(tx_buffer, rx_buffer, sizeof(rx_buffer));
	if (sp_res == SP_RESULT_OK) {
		ffa_res = ffa_id_get(own_sp_id);
		if (ffa_res == FFA_OK) {
			status = 0;
		}
	}

	return status;
}

void locate_crypto_service(void)
{
	service_locator_init();

	int status;

	/* todo - add option to use configurable crypto service location */
	struct service_context *crypto_service_context =
		service_locator_query("sn:ffa:d9df52d5-16a2-4bb2-9aa4-d26d3b84e8c0:0", &status);

	if (crypto_service_context) {

		struct rpc_caller *caller;

		if (service_context_open(crypto_service_context, TS_RPC_ENCODING_PACKED_C, &caller)) {

			psa_crypto_client_init(caller);
		}
	}

	psa_crypto_init();
}