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- /*
- * Copyright (C) 2016 Intel Corporation. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * * Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * * Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in
- * the documentation and/or other materials provided with the
- * distribution.
- * * Neither the name of Intel Corporation nor the names of its
- * contributors may be used to endorse or promote products derived
- * from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- */
- #include "owndefs.h"
- #include "owncp.h"
- #include "pcpeccppoint.h"
- #include "pcpeccpmethod.h"
- #include "pcpeccpmethodcom.h"
- /*F*
- // Name: ippsECCPGenKeyPair
- //
- // Purpose: Generate (private,public) Key Pair
- //
- // Returns: Reason:
- // ippStsNullPtrErr NULL == pECC
- // NULL == pPrivate
- // NULL == pPublic
- //
- // ippStsContextMatchErr illegal pECC->idCtx
- // illegal pPrivate->idCtx
- // illegal pPublic->idCtx
- //
- // ippStsNoErr no errors
- //
- // Parameters:
- // pPrivate pointer to the resultant private key
- // pPublic pointer to the resultant public key
- // pECC pointer to the ECCP context
- //
- *F*/
- IPPFUN(IppStatus, ippsECCPGenKeyPair, (IppsBigNumState* pPrivate, IppsECCPPointState* pPublic,
- IppsECCPState* pECC,
- IppBitSupplier rndFunc, void* pRndParam))
- {
- IPP_BAD_PTR2_RET(pECC, rndFunc);
- /* use aligned EC context */
- pECC = (IppsECCPState*)( IPP_ALIGNED_PTR(pECC, ALIGN_VAL) );
- /* test ID */
- IPP_BADARG_RET(!ECP_VALID_ID(pECC), ippStsContextMatchErr);
- /* test private/public keys */
- IPP_BAD_PTR2_RET(pPrivate,pPublic);
- pPrivate = (IppsBigNumState*)( IPP_ALIGNED_PTR(pPrivate, ALIGN_VAL) );
- pPublic = (IppsECCPPointState*)( IPP_ALIGNED_PTR(pPublic, ALIGN_VAL) );
- IPP_BADARG_RET(!BN_VALID_ID(pPrivate), ippStsContextMatchErr);
- IPP_BADARG_RET((BN_ROOM(pPrivate)*BITSIZE(BNU_CHUNK_T)<ECP_ORDBITS(pECC)), ippStsSizeErr);
- IPP_BADARG_RET(!ECP_POINT_VALID_ID(pPublic), ippStsContextMatchErr);
- {
- /*
- // generate random private key X: 0 < X < R
- */
- int reqBitLen = ECP_ORDBITS(pECC);
- IppsBigNumState* pOrder = ECP_ORDER(pECC);
- int xSize;
- Ipp32u* pX = (Ipp32u*)BN_NUMBER(pPrivate);
- Ipp32u xMask = MAKEMASK32(reqBitLen);
- BN_SIGN(pPrivate) = ippBigNumPOS;
- do {
- xSize = BITS2WORD32_SIZE(reqBitLen);
- rndFunc(pX, reqBitLen, pRndParam);
- pX[xSize-1] &= xMask;
- FIX_BNU(pX, xSize);
- BN_SIZE(pPrivate) = INTERNAL_BNU_LENGTH(xSize);
- } while( (0 == cpBN_tst(pPrivate)) ||
- (0 <= cpBN_cmp(pPrivate, pOrder)) );
- /* calculate public key */
- ECP_METHOD(pECC)->MulBasePoint(pPrivate, pPublic, pECC, ECP_BNCTX(pECC));
- return ippStsNoErr;
- }
- }
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