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- /*
- * Copyright (C) 2011-2017 Intel Corporation. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * * Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * * Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in
- * the documentation and/or other materials provided with the
- * distribution.
- * * Neither the name of Intel Corporation nor the names of its
- * contributors may be used to endorse or promote products derived
- * from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- */
- #include "sgx_memset_s.h"
- #include "sgx_tcrypto.h"
- #include "aeerror.h"
- #include "tlv_common.h"
- #include "pek_pub_key.h"
- #include "peksk_pub.hh"
- ae_error_t aesm_check_pek_signature(const signed_pek_t& signed_pek, const extended_epid_group_blob_t& xegb)
- {
- uint8_t result = SGX_EC_INVALID_SIGNATURE;
- uint32_t i;
- sgx_status_t sgx_code;
- const uint8_t *p = (const uint8_t *)&xegb;
- for (i = 0; i < sizeof(xegb); i++){
- if (p[i] != 0){
- break;
- }
- }
- if (i == sizeof(xegb)){//if all bytes of xegb is 0, using hardcoded PEKSK public key
- sgx_code = check_pek_signature(signed_pek, (const sgx_ec256_public_t*)&g_pek_pub_key_little_endian, &result);
- }
- else{
- sgx_code = check_pek_signature(signed_pek, reinterpret_cast<const sgx_ec256_public_t*>(xegb.pek_sk), &result);
- }
- if(sgx_code == SGX_ERROR_OUT_OF_MEMORY)
- return AE_OUT_OF_MEMORY_ERROR;
- else if(sgx_code != SGX_SUCCESS)
- return AE_FAILURE; //unknown error code
- else if(result != SGX_EC_VALID)//sgx_code is SGX_SUCCESS
- return PVE_MSG_ERROR; //signature verification failed
- else
- return AE_SUCCESS;//PEK Singatue verified successfully
- }
- ae_error_t aesm_verify_xegb(const extended_epid_group_blob_t& signed_xegb)
- {
- uint8_t result = SGX_EC_INVALID_SIGNATURE;
- sgx_status_t sgx_code = verify_xegb(signed_xegb, &result);
- if (sgx_code == SGX_ERROR_INVALID_PARAMETER)
- return AE_INVALID_PARAMETER;
- else if(sgx_code == SGX_ERROR_OUT_OF_MEMORY)
- return AE_OUT_OF_MEMORY_ERROR;
- else if (sgx_code != SGX_SUCCESS)
- return AE_FAILURE; //unknown error code
- else if (result != SGX_EC_VALID)//sgx_code is SGX_SUCCESS
- return AE_INVALID_PARAMETER; //signature verification failed
- else
- return AE_SUCCESS;//XEGB Signature verified successfully
- }
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