linux-sgx-trts-modified/psw/ae/common/pve_pub_key.cpp

/*
 * Copyright (C) 2011-2018 Intel Corporation. All rights reserved.
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 * modification, are permitted provided that the following conditions
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 *     from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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 */

#include "byte_order.h"
#include "epid_pve_type.h"
#include "sgx_tcrypto.h"
#include "ipp_wrapper.h"


static void get_provision_server_rsa_key_little_endian_order(const signed_pek_t& pek, signed_pek_t& little_endian_key)
{
    uint32_t i;
    for(i=0;i<sizeof(pek.n);i++){
        little_endian_key.n[i] = pek.n[sizeof(pek.n)-1-i];
    }
    for(i=0;i<sizeof(pek.e);i++){
        little_endian_key.e[i] = pek.e[sizeof(pek.e)-1-i];
    }
}



//Function to get the rsa public key of backend server for IPP functions
//The output rsa_pub_key should be released by function free_rsa_key
IppStatus get_provision_server_rsa_pub_key_in_ipp_format(const signed_pek_t& pek, IppsRSAPublicKeyState **rsa_pub_key)
{
    signed_pek_t little_endian_key;
    get_provision_server_rsa_key_little_endian_order(pek, little_endian_key);
    return create_rsa_pub_key(RSA_3072_KEY_BYTES,
                       sizeof(little_endian_key.e),
                       reinterpret_cast<const Ipp32u*>(little_endian_key.n),
                       reinterpret_cast<const Ipp32u *>(&little_endian_key.e),
                       rsa_pub_key);
}