static void sample_ipp_secure_free_BN(IppsBigNumState *pBN, int size_in_bytes)
{
if(pBN == NULL || size_in_bytes <= 0 || size_in_bytes/sizeof(Ipp32u) <= 0)
{
if(pBN)
{
free(pBN);
}
return;
}
int bn_size = 0;
// Get the size of the IppsBigNumState context in bytes
// Since we have checked the size_in_bytes before and the &bn_size is not NULL, ippsBigNumGetSize never returns failure
ippsBigNumGetSize(size_in_bytes/(int)sizeof(Ipp32u), &bn_size);
if (bn_size <= 0)
{
free(pBN);
return;
}
// Clear the buffer before free.
memset_s(pBN, bn_size, 0, bn_size);
free(pBN);
return;
}
void sgx_ipp_secure_free_BN(IppsBigNumState *pBN, int size_in_bytes)
{
if (pBN == NULL || size_in_bytes <= 0 || ((size_in_bytes % sizeof(Ipp32u)) != 0))
{
if (pBN)
{
free(pBN);
}
return;
}
int bn_size = 0;
// Get the size of the IppsBigNumState context in bytes
// Since we have checked the size_in_bytes before and the &bn_size is not NULL, ippsBigNumGetSize never returns failure
IppStatus error_code = ippsBigNumGetSize(size_in_bytes/(int)sizeof(Ipp32u), &bn_size);
if (error_code != ippStsNoErr)
{
free(pBN);
return;
}
// Clear the buffer before free.
memset_s(pBN, bn_size, 0, bn_size);
free(pBN);
return;
}
IppsBigNumState* bnNew(const char* sBN, const int size){
// get the size of the Big Number context
int ctxSize;
const int strSize = (const int)(strlen(sBN)+7)/8;
if ( strSize > size ){
std::cerr << "Caution in IppsBigNumState* bnNew(const char* sBN, int size):\n\t size of string number representation greater then params size supplied\n";
std::cerr << sBN << std::endl;
}
IppStatus res;
res = ippsBigNumGetSize(size, &ctxSize);
if (res != ippStsNoErr )
std::cerr << res;
// allocate the Big Number context
IppsBigNumState* pBN = (IppsBigNumState*) ( new Ipp8u[ctxSize] );
// and initialize one
res = ippsBigNumInit(size, pBN);
if (res != ippStsNoErr )
std::cerr << res;
Ipp8u* octetStr = new Ipp8u[(strlen(sBN)-1)/2+1+1];
strtoIpp8u( sBN, octetStr);
res = ippsSetOctString_BN(octetStr, (int)(strlen(sBN)-1)/2+1, pBN);
if (res != ippStsNoErr )
std::cerr << res;
delete[] octetStr;
// return pointer to the Big Number context for future use
return pBN;
}
IppStatus sgx_ipp_newBN(const Ipp32u *p_data, int size_in_bytes, IppsBigNumState **p_new_BN)
{
IppsBigNumState *pBN = 0;
int bn_size = 0;
if (p_new_BN == NULL || (size_in_bytes <= 0) || ((size_in_bytes % sizeof(Ipp32u)) != 0))
return ippStsBadArgErr;
// Get the size of the IppsBigNumState context in bytes
IppStatus error_code = ippsBigNumGetSize(size_in_bytes/(int)sizeof(Ipp32u), &bn_size);
if (error_code != ippStsNoErr)
{
*p_new_BN = 0;
return error_code;
}
pBN = (IppsBigNumState *)malloc(bn_size);
if (!pBN)
{
error_code = ippStsMemAllocErr;
*p_new_BN = 0;
return error_code;
}
// Initialize context and partition allocated buffer
error_code = ippsBigNumInit(size_in_bytes/(int)sizeof(Ipp32u), pBN);
if (error_code != ippStsNoErr)
{
free(pBN);
*p_new_BN = 0;
return error_code;
}
if (p_data)
{
error_code = ippsSet_BN(IppsBigNumPOS, size_in_bytes/(int)sizeof(Ipp32u), p_data, pBN);
if (error_code != ippStsNoErr)
{
*p_new_BN = 0;
free(pBN);
return error_code;
}
}
*p_new_BN = pBN;
return error_code;
}
IppsBigNumState* bnNew(const int size, const Ipp8u *pData){
// get the size of the Big Number context
int ctxSize;
IppStatus res;
res = ippsBigNumGetSize(size, &ctxSize);
if (res != ippStsNoErr )
std::cerr << res;
// allocate the Big Number context
IppsBigNumState* pBN = (IppsBigNumState*) ( new Ipp8u[ctxSize] );
// and initialize one
res = ippsBigNumInit(size, pBN);
if (res != ippStsNoErr )
std::cerr << res;
res = ippsSetOctString_BN(pData, 4*size, pBN);
if (res != ippStsNoErr )
std::cerr << res;
// return pointer to the Big Number context for future use
return pBN;
}
extern "C" IppStatus newBN(const Ipp32u *data, int size_in_bytes, IppsBigNumState **p_new_BN)
{
IppsBigNumState *pBN = 0;
int bn_size = 0;
if (p_new_BN == NULL || size_in_bytes <= 0 || size_in_bytes % sizeof(Ipp32u))
return ippStsBadArgErr;
/* Get the size of the IppsBigNumState context in bytes */
IppStatus error_code = ippsBigNumGetSize(size_in_bytes / (int)sizeof(Ipp32u), &bn_size);
if (error_code != ippStsNoErr) {
*p_new_BN = 0;
return error_code;
}
pBN = (IppsBigNumState *)malloc(bn_size);
if (!pBN) {
error_code = ippStsMemAllocErr;
*p_new_BN = 0;
return error_code;
}
/* Initializes context and partitions allocated buffer */
error_code = ippsBigNumInit(size_in_bytes / (int)sizeof(Ipp32u), pBN);
if (error_code != ippStsNoErr) {
SAFE_FREE_MM(pBN);
*p_new_BN = 0;
return error_code;
}
if (data) {
error_code = ippsSet_BN(IppsBigNumPOS, size_in_bytes / (int)sizeof(Ipp32u), data, pBN);
if (error_code != ippStsNoErr) {
SAFE_FREE_MM(pBN);
*p_new_BN = 0;
return error_code;
}
}
*p_new_BN = pBN;
return error_code;
}
IppsBigNumState* bnNew(const int size, const Ipp32u* pData){
// get the size of the Big Number context
int ctxSize;
IppStatus res;
res = ippsBigNumGetSize(size, &ctxSize);
if (res != ippStsNoErr )
std::cerr << res;
// allocate the Big Number context
IppsBigNumState* pBN = (IppsBigNumState*) ( new Ipp8u[ctxSize] );
// and initialize one
res = ippsBigNumInit(size, pBN);
if (res != ippStsNoErr )
std::cerr << res;
// if any data was supplied, then set up the Big Number value
if(pData){
res = ippsSet_BN(IppsBigNumPOS, size, pData, pBN);
if (res != ippStsNoErr )
std::cerr << res;
}
// return pointer to the Big Number context for future use
return pBN;
}
extern "C" void secure_free_BN(IppsBigNumState *pBN, int size_in_bytes)
{
if (pBN == NULL || size_in_bytes <= 0 || size_in_bytes % sizeof(Ipp32u)) {
if (pBN) {
free(pBN);
}
return;
}
int bn_size = 0;
/* Get the size of the IppsBigNumState context in bytes
* Since we have checked the size_in_bytes before and the &bn_size is not NULL,
* ippsBigNumGetSize never returns failure
*/
if (ippsBigNumGetSize(size_in_bytes / (int)sizeof(Ipp32u), &bn_size) != ippStsNoErr) {
free(pBN);
return;
}
/* Clear the buffer before free. */
memset_s(pBN, bn_size, 0, bn_size);
free(pBN);
return;
}
void bnCopy(IppsBigNumState *pDest, const IppsBigNumState *pSource, const int size){
int iCtxSize;
ippsBigNumGetSize (size, &iCtxSize );
memcpy( pDest, pSource, iCtxSize ) ;
}
