corda/sdk/tseal/tSeal_util.cpp
Angie Chinchilla 9441de4c38 Initial release of Intel SGX for Linux.
This release is used in conjunction with the linux-sgx-driver Intial release:
https://github.com/01org/linux-sgx-driver
commit-id: 0e865ce5e6b297a787bcdc12d98bada8174be6d7

Intel-id: 33399

Signed-off-by: Angie Chinchilla <angie.v.chinchilla@intel.com>
2016-06-23 18:51:53 -04:00

64 lines
2.6 KiB
C++

/*
* Copyright (C) 2011-2016 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_tseal.h"
#ifndef UINT32_MAX
#define UINT32_MAX 0xffffffffU
#endif
uint32_t sgx_calc_sealed_data_size(const uint32_t add_mac_txt_size, const uint32_t txt_encrypt_size)
{
if(add_mac_txt_size > UINT32_MAX - txt_encrypt_size)
return UINT32_MAX;
uint32_t payload_size = add_mac_txt_size + txt_encrypt_size; //Calculate the payload size
if(payload_size > UINT32_MAX - sizeof(sgx_sealed_data_t))
return UINT32_MAX;
return (uint32_t)(sizeof(sgx_sealed_data_t) + payload_size);
}
uint32_t sgx_get_add_mac_txt_len(const sgx_sealed_data_t* p_sealed_data)
{
if(p_sealed_data == NULL)
return UINT32_MAX;
uint32_t data_size = p_sealed_data->aes_data.payload_size - p_sealed_data->plain_text_offset;
if (data_size > p_sealed_data->aes_data.payload_size)
return UINT32_MAX;
return data_size;
}
uint32_t sgx_get_encrypt_txt_len(const sgx_sealed_data_t* p_sealed_data)
{
return ((p_sealed_data == NULL) ? UINT32_MAX : p_sealed_data->plain_text_offset);
}