static int GenerateSing(const Ipp8u* pMsg, int msgLen, /* message representation */
const Ipp8u* pSalt, int saltLen, /* fied string */
Ipp8u* pSign,
const IppsRSAPrivateKeyState* pPrvKey,
const IppsRSAPublicKeyState* pPubKey,
Ipp8u* pBuffer)
{
/* size of RSA modulus in bytes and chunks */
cpSize rsaBits = RSA_PRV_KEY_BITSIZE_N(pPrvKey);
cpSize k = BITS2WORD8_SIZE(rsaBits);
cpSize nsN = BITS_BNU_CHUNK(rsaBits);
/* EMSA-PKCS-v1_5 encoding */
int result = EMSA_PKCSv15(pMsg,msgLen, pSalt,saltLen, pSign, k);
if(result) {
/* align buffer */
BNU_CHUNK_T* pScratchBuffer = (BNU_CHUNK_T*)(IPP_ALIGNED_PTR(pBuffer, (int)sizeof(BNU_CHUNK_T)) );
/* temporary BNs */
__ALIGN8 IppsBigNumState bnC;
__ALIGN8 IppsBigNumState bnP;
/* make BNs */
BN_Make(pScratchBuffer, pScratchBuffer+nsN+1, nsN, &bnC);
pScratchBuffer += (nsN+1)*2;
BN_Make(pScratchBuffer, pScratchBuffer+nsN+1, nsN, &bnP);
pScratchBuffer += (nsN+1)*2;
/*
// private-key operation
*/
ippsSetOctString_BN(pSign, k, &bnC);
if(RSA_PRV_KEY1_VALID_ID(pPrvKey))
gsRSAprv_cipher(&bnP, &bnC, pPrvKey, pScratchBuffer);
else
gsRSAprv_cipher_crt(&bnP, &bnC, pPrvKey, pScratchBuffer);
ippsGetOctString_BN(pSign, k, &bnP);
/* check the result before send it out (fault attack mitigatioin) */
if(pPubKey) {
gsRSApub_cipher(&bnP, &bnP, pPubKey, pScratchBuffer);
/* check signature before send it out (fault attack mitigatioin) */
if(0!=cpBN_cmp(&bnP, &bnC)) {
PaddBlock(0, pSign, k);
result = 0;
}
}
}
return result;
}
//
*F*/
IPPFUN(IppStatus, ippsECCPPublicKey, (const IppsBigNumState* pPrivate,
IppsECCPPointState* pPublic,
IppsECCPState* pECC))
{
/* test pECC */
IPP_BAD_PTR1_RET(pECC);
/* use aligned EC context */
pECC = (IppsECCPState*)( IPP_ALIGNED_PTR(pECC, ALIGN_VAL) );
/* test ID */
IPP_BADARG_RET(!ECP_VALID_ID(pECC), ippStsContextMatchErr);
/* test public key */
IPP_BAD_PTR1_RET(pPublic);
pPublic = (IppsECCPPointState*)( IPP_ALIGNED_PTR(pPublic, ALIGN_VAL) );
IPP_BADARG_RET(!ECP_POINT_VALID_ID(pPublic), ippStsContextMatchErr);
/* test private keys */
IPP_BAD_PTR1_RET(pPrivate);
pPrivate = (IppsBigNumState*)( IPP_ALIGNED_PTR(pPrivate, ALIGN_VAL) );
IPP_BADARG_RET(!BN_VALID_ID(pPrivate), ippStsContextMatchErr);
IPP_BADARG_RET(!((0<cpBN_tst(pPrivate)) && (0>cpBN_cmp(pPrivate, ECP_ORDER(pECC))) ), ippStsIvalidPrivateKey);
/* calculates public key */
//ECP_METHOD(pECC)->MulPoint(ECP_GENC(pECC), pPrivate, pPublic, pECC, ECP_BNCTX(pECC));
ECP_METHOD(pECC)->MulBasePoint(pPrivate, pPublic, pECC, ECP_BNCTX(pECC));
return ippStsNoErr;
}
