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https://github.com/corda/corda.git
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9441de4c38
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>
236 lines
9.2 KiB
C++
236 lines
9.2 KiB
C++
/*
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* Copyright (C) 2011-2016 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_tcrypto.h"
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#include "ippcp.h"
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#include "stdlib.h"
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#include "string.h"
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/* Rijndael AES-GCM
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* Parameters:
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* Return: sgx_status_t - SGX_SUCCESS or failure as defined sgx_error.h
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* Inputs: sgx_aes_gcm_128bit_key_t *p_key - Pointer to key used in encryption/decryption operation
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* uint8_t *p_src - Pointer to input stream to be encrypted/decrypted
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* uint32_t src_len - Length of input stream to be encrypted/decrypted
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* uint8_t *p_iv - Pointer to initialization vector to use
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* uint32_t iv_len - Length of initialization vector
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* uint8_t *p_aad - Pointer to input stream of additional authentication data
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* uint32_t aad_len - Length of additional authentication data stream
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* sgx_aes_gcm_128bit_tag_t *p_in_mac - Pointer to expected MAC in decryption process
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* Output: uint8_t *p_dst - Pointer to cipher text. Size of buffer should be >= src_len.
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* sgx_aes_gcm_128bit_tag_t *p_out_mac - Pointer to MAC generated from encryption process
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* NOTE: Wrapper is responsible for confirming decryption tag matches encryption tag */
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sgx_status_t sgx_rijndael128GCM_encrypt(const sgx_aes_gcm_128bit_key_t *p_key, const uint8_t *p_src, uint32_t src_len,
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uint8_t *p_dst, const uint8_t *p_iv, uint32_t iv_len, const uint8_t *p_aad, uint32_t aad_len,
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sgx_aes_gcm_128bit_tag_t *p_out_mac)
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{
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IppStatus error_code = ippStsNoErr;
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IppsAES_GCMState* pState = NULL;
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int ippStateSize = 0;
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if ((p_key == NULL) || ((src_len > 0) && (p_dst == NULL)) || ((src_len > 0) && (p_src == NULL))
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|| (p_out_mac == NULL) || (iv_len != SGX_AESGCM_IV_SIZE) || ((aad_len > 0) && (p_aad == NULL))
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|| (p_iv == NULL) || ((p_src == NULL) && (p_aad == NULL)))
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{
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return SGX_ERROR_INVALID_PARAMETER;
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}
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error_code = ippsAES_GCMGetSize(&ippStateSize);
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if (error_code != ippStsNoErr)
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{
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return SGX_ERROR_UNEXPECTED;
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}
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pState = (IppsAES_GCMState*)malloc(ippStateSize);
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if (pState == NULL)
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{
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return SGX_ERROR_OUT_OF_MEMORY;
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}
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error_code = ippsAES_GCMInit((const Ipp8u *)p_key, SGX_AESGCM_KEY_SIZE, pState, ippStateSize);
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if (error_code != ippStsNoErr)
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{
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// Clear temp State before free.
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memset_s(pState, ippStateSize, 0, ippStateSize);
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free(pState);
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switch (error_code)
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{
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case ippStsMemAllocErr: return SGX_ERROR_OUT_OF_MEMORY;
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case ippStsNullPtrErr:
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case ippStsLengthErr: return SGX_ERROR_INVALID_PARAMETER;
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default: return SGX_ERROR_UNEXPECTED;
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}
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}
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error_code = ippsAES_GCMStart(p_iv, SGX_AESGCM_IV_SIZE, p_aad, aad_len, pState);
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if (error_code != ippStsNoErr)
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{
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// Clear temp State before free.
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memset_s(pState, ippStateSize, 0, ippStateSize);
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free(pState);
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switch (error_code)
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{
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case ippStsNullPtrErr:
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case ippStsLengthErr: return SGX_ERROR_INVALID_PARAMETER;
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default: return SGX_ERROR_UNEXPECTED;
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}
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}
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if (src_len > 0) {
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error_code = ippsAES_GCMEncrypt(p_src, p_dst, src_len, pState);
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if (error_code != ippStsNoErr)
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{
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// Clear temp State before free.
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memset_s(pState, ippStateSize, 0, ippStateSize);
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free(pState);
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switch (error_code)
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{
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case ippStsNullPtrErr: return SGX_ERROR_INVALID_PARAMETER;
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default: return SGX_ERROR_UNEXPECTED;
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}
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}
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}
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error_code = ippsAES_GCMGetTag((Ipp8u *)p_out_mac, SGX_AESGCM_MAC_SIZE, pState);
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if (error_code != ippStsNoErr)
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{
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// Clear temp State before free.
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memset_s(p_dst, src_len, 0, src_len);
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memset_s(pState, ippStateSize, 0, ippStateSize);
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free(pState);
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switch (error_code)
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{
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case ippStsNullPtrErr:
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case ippStsLengthErr: return SGX_ERROR_INVALID_PARAMETER;
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default: return SGX_ERROR_UNEXPECTED;
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}
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}
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// Clear temp State before free.
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memset_s(pState, ippStateSize, 0, ippStateSize);
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free(pState);
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return SGX_SUCCESS;
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}
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sgx_status_t sgx_rijndael128GCM_decrypt(const sgx_aes_gcm_128bit_key_t *p_key, const uint8_t *p_src,
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uint32_t src_len, uint8_t *p_dst, const uint8_t *p_iv, uint32_t iv_len,
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const uint8_t *p_aad, uint32_t aad_len, const sgx_aes_gcm_128bit_tag_t *p_in_mac)
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{
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IppStatus error_code = ippStsNoErr;
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uint8_t l_tag[SGX_AESGCM_MAC_SIZE];
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IppsAES_GCMState* pState = NULL;
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int ippStateSize = 0;
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if ((p_key == NULL) || ((src_len > 0) && (p_dst == NULL)) || ((src_len > 0) && (p_src == NULL))
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|| (p_in_mac == NULL) || (iv_len != SGX_AESGCM_IV_SIZE) || ((aad_len > 0) && (p_aad == NULL))
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|| (p_iv == NULL) || ((p_src == NULL) && (p_aad == NULL)))
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{
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return SGX_ERROR_INVALID_PARAMETER;
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}
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// Autenthication Tag returned by Decrypt to be compared with Tag created during seal
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memset(&l_tag, 0, SGX_AESGCM_MAC_SIZE);
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error_code = ippsAES_GCMGetSize(&ippStateSize);
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if (error_code != ippStsNoErr)
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{
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return SGX_ERROR_UNEXPECTED;
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}
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pState = (IppsAES_GCMState*)malloc(ippStateSize);
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if (pState == NULL)
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{
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return SGX_ERROR_OUT_OF_MEMORY;
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}
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error_code = ippsAES_GCMInit((const Ipp8u *)p_key, SGX_AESGCM_KEY_SIZE, pState, ippStateSize);
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if (error_code != ippStsNoErr)
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{
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// Clear temp State before free.
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memset_s(pState, ippStateSize, 0, ippStateSize);
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free(pState);
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switch (error_code)
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{
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case ippStsMemAllocErr: return SGX_ERROR_OUT_OF_MEMORY;
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case ippStsNullPtrErr:
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case ippStsLengthErr: return SGX_ERROR_INVALID_PARAMETER;
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default: return SGX_ERROR_UNEXPECTED;
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}
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}
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error_code = ippsAES_GCMStart(p_iv, SGX_AESGCM_IV_SIZE, p_aad, aad_len, pState);
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if (error_code != ippStsNoErr)
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{
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// Clear temp State before free.
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memset_s(pState, ippStateSize, 0, ippStateSize);
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free(pState);
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switch (error_code)
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{
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case ippStsNullPtrErr:
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case ippStsLengthErr: return SGX_ERROR_INVALID_PARAMETER;
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default: return SGX_ERROR_UNEXPECTED;
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}
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}
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if (src_len > 0) {
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error_code = ippsAES_GCMDecrypt(p_src, p_dst, src_len, pState);
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if (error_code != ippStsNoErr)
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{
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// Clear temp State before free.
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memset_s(pState, ippStateSize, 0, ippStateSize);
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free(pState);
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switch (error_code)
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{
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case ippStsNullPtrErr: return SGX_ERROR_INVALID_PARAMETER;
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default: return SGX_ERROR_UNEXPECTED;
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}
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}
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}
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error_code = ippsAES_GCMGetTag((Ipp8u *)l_tag, SGX_AESGCM_MAC_SIZE, pState);
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if (error_code != ippStsNoErr)
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{
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// Clear temp State before free.
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memset_s(p_dst, src_len, 0, src_len);
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memset_s(pState, ippStateSize, 0, ippStateSize);
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free(pState);
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switch (error_code)
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{
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case ippStsNullPtrErr:
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case ippStsLengthErr: return SGX_ERROR_INVALID_PARAMETER;
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default: return SGX_ERROR_UNEXPECTED;
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}
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}
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// Clear temp State before free.
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memset_s(pState, ippStateSize, 0, ippStateSize);
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free(pState);
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// Verify current data tag = data tag generated when sealing the data blob
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if (consttime_memequal(p_in_mac, &l_tag, SGX_AESGCM_MAC_SIZE) == 0)
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{
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memset_s(p_dst, src_len, 0, src_len);
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memset_s(&l_tag, SGX_AESGCM_MAC_SIZE, 0, SGX_AESGCM_MAC_SIZE);
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return SGX_ERROR_MAC_MISMATCH;
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}
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memset_s(&l_tag, SGX_AESGCM_MAC_SIZE, 0, SGX_AESGCM_MAC_SIZE);
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return SGX_SUCCESS;
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}
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