mirror of
https://github.com/intel/linux-sgx
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Li, Xun
109 lines
4.0 KiB
C++
109 lines
4.0 KiB
C++
/*
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* Copyright (C) 2011-2020 Intel Corporation. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* * Neither the name of Intel Corporation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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/**
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* File: sgx_verify_report.cpp
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* Description:
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* API for report verification
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*/
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#include <sgx_random_buffers.h>
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#include <sgx_secure_align.h>
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#include "sgx_utils.h"
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#include "util.h"
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#include <stdlib.h>
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#include <string.h>
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#include "se_memcpy.h"
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#include "sgx_trts.h"
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#include "sgx_tcrypto.h"
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#include "se_cdefs.h"
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// add a version to tservice.
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SGX_ACCESS_VERSION(tservice, 3)
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sgx_status_t sgx_verify_report(const sgx_report_t *report)
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{
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sgx_mac_t mac;
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sgx_key_request_t key_request;
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sgx_status_t err = SGX_ERROR_UNEXPECTED;
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//check parameter
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if(!report||!sgx_is_within_enclave(report, sizeof(*report)))
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{
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return SGX_ERROR_INVALID_PARAMETER;
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}
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memset(&mac, 0, sizeof(sgx_mac_t));
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memset(&key_request, 0, sizeof(sgx_key_request_t));
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//prepare the key_request
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key_request.key_name = SGX_KEYSELECT_REPORT;
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memcpy_s(&key_request.key_id, sizeof(key_request.key_id), &report->key_id, sizeof(report->key_id));
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//randomly_placed_buffer<sgx_key_128bit_t, sizeof(sgx_key_128bit_t), 0x800> report_key_buf{};
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//auto *report_key = report_key_buf.randomize_object();
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using creport_key800 = randomly_placed_object<sgx::custom_alignment_aligned<sgx_key_128bit_t, sizeof(sgx_key_128bit_t), 0, sizeof(sgx_key_128bit_t)>, 0x800>;
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creport_key800 oreport_key_buf;
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auto* oreport_key = oreport_key_buf.instantiate_object();
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auto* report_key = &oreport_key->v;
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//get the report key
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// Since the key_request is not an input parameter by caller,
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// we suppose sgx_get_key would never return the following error code:
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// SGX_ERROR_INVALID_PARAMETER
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// SGX_ERROR_INVALID_ATTRIBUTE
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// SGX_ERROR_INVALID_CPUSVN
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// SGX_ERROR_INVALID_ISVSVN
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// SGX_ERROR_INVALID_KEYNAME
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err = sgx_get_key(&key_request, report_key);
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if(err != SGX_SUCCESS)
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{
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return err; // err must be SGX_ERROR_OUT_OF_MEMORY or SGX_ERROR_UNEXPECTED
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}
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//get the report mac
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err = sgx_rijndael128_cmac_msg((sgx_cmac_128bit_key_t*)report_key, (const uint8_t *)(&report->body), sizeof(sgx_report_body_t), &mac);
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memset_s (report_key, sizeof(sgx_key_128bit_t), 0, sizeof(sgx_key_128bit_t));
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if (SGX_SUCCESS != err)
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{
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if(err != SGX_ERROR_OUT_OF_MEMORY)
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err = SGX_ERROR_UNEXPECTED;
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return err;
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}
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if(consttime_memequal(mac, report->mac, sizeof(sgx_mac_t)) == 0)
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{
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return SGX_ERROR_MAC_MISMATCH;
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}
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else
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{
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return SGX_SUCCESS;
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}
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}
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