mirror of
https://github.com/intel/linux-sgx
synced 2026-06-08 14:49:32 +00:00
Li, Xun
128 lines
4.5 KiB
C++
128 lines
4.5 KiB
C++
/*
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* Copyright (C) 2011-2018 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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#include "sgx_trts.h"
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#include "sgx_tseal.h"
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#include <string.h>
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#include "t_pairing_blob.h"
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ae_error_t UnsealPairingBlob(const pairing_blob_t* pPairingBlob, pairing_data_t* pPairingData)
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{
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ae_error_t status = PSE_PAIRING_BLOB_UNSEALING_ERROR;
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if (!pPairingBlob || !pPairingData)
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{
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return status;
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}
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do
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{
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// Verify that the pairing blob definition hasn't changed
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if (pPairingBlob->plaintext.seal_blob_type != PSE_SEAL_PAIRING_BLOB ||
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pPairingBlob->plaintext.pairing_blob_version != PSE_PAIRING_BLOB_VERSION)
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break;
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if (!sgx_is_within_enclave(pPairingData, sizeof(pairing_data_t)))
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break;
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memset_s(pPairingData, sizeof(*pPairingData), 0, sizeof(*pPairingData));
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uint32_t encrypted_data_len = sizeof(se_secret_pairing_data_t);
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uint32_t additional_MACtext_len = sizeof(se_plaintext_pairing_data_t);
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if (sgx_get_encrypt_txt_len((const sgx_sealed_data_t*)&pPairingBlob->sealed_pairing_data) != encrypted_data_len)
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break;
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if (sgx_get_add_mac_txt_len((const sgx_sealed_data_t*)&pPairingBlob->sealed_pairing_data) != additional_MACtext_len)
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break;
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sgx_status_t seStatus = sgx_unseal_data(
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(const sgx_sealed_data_t*)&pPairingBlob->sealed_pairing_data,
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(uint8_t*)&pPairingData->plaintext, &additional_MACtext_len,
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(uint8_t*)&pPairingData->secret_data, &encrypted_data_len);
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if ((SGX_SUCCESS != seStatus) ||
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(sizeof(se_secret_pairing_data_t) != encrypted_data_len) ||
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sizeof(se_plaintext_pairing_data_t) != additional_MACtext_len)
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{
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break;
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}
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status = AE_SUCCESS;
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} while (false);
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return status;
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}
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ae_error_t SealPairingBlob(pairing_data_t* pPairingData, pairing_blob_t* pPairingBlob)
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{
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const uint32_t encrypted_data_len = sizeof(se_secret_pairing_data_t);
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const uint32_t additional_MACtext_len = sizeof(se_plaintext_pairing_data_t);
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ae_error_t status = PSE_PAIRING_BLOB_SEALING_ERROR;
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if (!pPairingData || !pPairingBlob)
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{
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return status;
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}
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do
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{
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if (!sgx_is_within_enclave(pPairingData, sizeof(pairing_data_t)))
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break;
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memset_s(pPairingBlob, sizeof(*pPairingBlob), 0, sizeof(*pPairingBlob));
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pPairingData->plaintext.seal_blob_type = PSE_SEAL_PAIRING_BLOB;
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pPairingData->plaintext.pairing_blob_version = PSE_PAIRING_BLOB_VERSION;
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UINT32 sealed_data_size = sgx_calc_sealed_data_size(additional_MACtext_len, encrypted_data_len);
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sgx_status_t seStatus = sgx_seal_data(
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additional_MACtext_len, (uint8_t*)&pPairingData->plaintext,
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encrypted_data_len, (uint8_t*)&pPairingData->secret_data,
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sealed_data_size, (sgx_sealed_data_t*)&pPairingBlob->sealed_pairing_data);
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if (SGX_SUCCESS != seStatus)
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break;
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status = AE_SUCCESS;
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} while (false);
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return status;
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}
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