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https://github.com/intel/linux-sgx
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Li, Xun
e7bbc158fa
Supported the AEX (Asynchronous Enclave Exit) Notify feature. Supported Mbed-TLS Cryptography library (excluding SSL/TLS portion) in Enclave. Applied patches to OpenSSL 1.1.1t, fixed CVE-2023-1255, CVE-2023-0465 and CVE-2023-0466. Upgraded to Intel(R) Integrated Performance Primitives (IPP) Cryptography library version 2021.7. Upgraded Intel SGX Quote Verification Enclave to integrate updated SgxSSL. Enhanced the attestation local cache functionality by giving users the option to provide their own cache file. Enabled QPL/QCNL log in DCAP samples. Fixed bugs. Signed-off-by: Li, Xun <xun.li@intel.com>
105 lines
3.5 KiB
C++
105 lines
3.5 KiB
C++
/*
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* Copyright (C) 2011-2021 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 "Enclave.h"
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#include "Enclave_t.h" /* print_string */
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#include <stdarg.h>
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#include <stdio.h> /* vsnprintf */
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#include <string.h>
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#include <sgx_trts_exception.h>
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#include <sgx_trts_aex.h>
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#include <sgx_trts.h>
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#include "powers_of_two.h"
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void count_powers_of_two(uint64_t low, uint64_t high, uint32_t* count)
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{
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if(!count) return;
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const uint32_t local_count = count_powers_of_two(low,high);
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*count = local_count;
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}
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/*
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* printf:
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* Invokes OCALL to display the enclave buffer to the terminal.
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*/
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int printf(const char* fmt, ...)
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{
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char buf[BUFSIZ] = { '\0' };
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va_list ap;
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va_start(ap, fmt);
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vsnprintf(buf, BUFSIZ, fmt, ap);
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va_end(ap);
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ocall_print_string(buf);
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return (int)strnlen(buf, BUFSIZ - 1) + 1;
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}
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uint64_t g_aex_count = 0;
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static void my_aex_notify_handler(const sgx_exception_info_t *info, const void * args)
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{
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// This sample will not perform any additional mitigations beyond what the trts
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// does. It will do some simple counting.
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(void)info;
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(void)args;
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g_aex_count++;
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}
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// Count the number of powers of two between [low, high].
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// Also count the number of times our AEX-Notify handler was called.
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// If the function runs long enough, normal OS preemptive multitasking
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// should generate an AEX.
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// You can use additional threads and thread affinity to change the OS
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// behavior and induce more async enclave exits as needed.
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void count_powers_of_two_with_aex(uint64_t low, uint64_t high, uint32_t* count, uint64_t* aex_count)
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{
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if(!count) return;
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if(!aex_count) return;
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g_aex_count = 0;
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const char* args = NULL;
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sgx_aex_mitigation_node_t node;
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sgx_register_aex_handler(&node, my_aex_notify_handler, (const void*)args);
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sgx_set_ssa_aexnotify(1);
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const uint32_t local_count = count_powers_of_two(low,high);
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*count = local_count;
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sgx_set_ssa_aexnotify(0);
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sgx_unregister_aex_handler(my_aex_notify_handler);
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*aex_count = g_aex_count;
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}
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