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

/*
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#include "arch.h"
#include "sgx_tcrypto.h"
#include "pek_pub_key.h"
#include "pve_qe_common.h"
#include <string.h>
#include "peksk_pub.hh"


//Function to verify the ECDSA signature of a PEK
//SHA1 value for integrity checking is not verified since the ECDSA verification could make sure the integrity at the sametime.
sgx_status_t check_pek_signature(const signed_pek_t& signed_pek, uint8_t *result)
{
    sgx_status_t status = SGX_SUCCESS;
    sgx_ecc_state_handle_t handle= 0;
    sgx_ec256_signature_t ec_signature;
    status = sgx_ecc256_open_context(&handle);
    if(SGX_SUCCESS!=status){
        return status;
    }
    se_static_assert(sizeof(ec_signature)==sizeof(signed_pek.pek_signature));
    memcpy(&ec_signature, signed_pek.pek_signature, sizeof(signed_pek.pek_signature));
    SWAP_ENDIAN_32B(ec_signature.x);
    SWAP_ENDIAN_32B(ec_signature.y);
    status = sgx_ecdsa_verify(reinterpret_cast<const uint8_t *>(&signed_pek),
        static_cast<uint32_t>(sizeof(signed_pek.n)+sizeof(signed_pek.e)),
        const_cast<sgx_ec256_public_t *>(&g_pek_pub_key_little_endian),
        &ec_signature,
        result,
        handle);
    (void)sgx_ecc256_close_context(handle);
    return status;
}