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diff --git a/ext/ipp/sources/ippcp/pcpbngetref.c b/ext/ipp/sources/ippcp/pcpbngetref.c
new file mode 100644
index 0000000..fa45b68
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+++ b/ext/ipp/sources/ippcp/pcpbngetref.c
@@ -0,0 +1,114 @@
+/*******************************************************************************
+* Copyright 2002-2018 Intel Corporation
+* All Rights Reserved.
+*
+* If this  software was obtained  under the  Intel Simplified  Software License,
+* the following terms apply:
+*
+* The source code,  information  and material  ("Material") contained  herein is
+* owned by Intel Corporation or its  suppliers or licensors,  and  title to such
+* Material remains with Intel  Corporation or its  suppliers or  licensors.  The
+* Material  contains  proprietary  information  of  Intel or  its suppliers  and
+* licensors.  The Material is protected by  worldwide copyright  laws and treaty
+* provisions.  No part  of  the  Material   may  be  used,  copied,  reproduced,
+* modified, published,  uploaded, posted, transmitted,  distributed or disclosed
+* in any way without Intel's prior express written permission.  No license under
+* any patent,  copyright or other  intellectual property rights  in the Material
+* is granted to  or  conferred  upon  you,  either   expressly,  by implication,
+* inducement,  estoppel  or  otherwise.  Any  license   under such  intellectual
+* property rights must be express and approved by Intel in writing.
+*
+* Unless otherwise agreed by Intel in writing,  you may not remove or alter this
+* notice or  any  other  notice   embedded  in  Materials  by  Intel  or Intel's
+* suppliers or licensors in any way.
+*
+*
+* If this  software  was obtained  under the  Apache License,  Version  2.0 (the
+* "License"), the following terms apply:
+*
+* You may  not use this  file except  in compliance  with  the License.  You may
+* obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0
+*
+*
+* Unless  required  by   applicable  law  or  agreed  to  in  writing,  software
+* distributed under the License  is distributed  on an  "AS IS"  BASIS,  WITHOUT
+* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+*
+* See the   License  for the   specific  language   governing   permissions  and
+* limitations under the License.
+*******************************************************************************/
+
+/* 
+//               Intel(R) Integrated Performance Primitives
+//                   Cryptographic Primitives (ippcp)
+// 
+//  Contents:
+//     ippsBigNumGetSize()
+//     ippsBigNumInit()
+// 
+//     ippsSet_BN()
+//     ippsGet_BN()
+//     ippsGetSize_BN()
+//     ippsExtGet_BN()
+//     ippsRef_BN()
+// 
+//     ippsCmpZero_BN()
+//     ippsCmp_BN()
+// 
+//     ippsAdd_BN()
+//     ippsSub_BN()
+//     ippsMul_BN()
+//     ippsMAC_BN_I()
+//     ippsDiv_BN()
+//     ippsMod_BN()
+//     ippsGcd_BN()
+//     ippsModInv_BN()
+// 
+//     cpPackBigNumCtx(), cpUnpackBigNumCtx()
+// 
+// 
+*/
+
+#include "owndefs.h"
+#include "owncp.h"
+#include "pcpbn.h"
+#include "pcptool.h"
+
+
+/*F*
+//    Name: ippsRef_BN
+//
+// Purpose: Get BigNum info.
+//
+// Returns:                   Reason:
+//    ippStsNullPtrErr           pBN == NULL
+//    ippStsContextMatchErr      !BN_VALID_ID(pBN)
+//    ippStsNoErr                no errors
+//
+// Parameters:
+//    pSgn     pointer to the sign
+//    pBitSize pointer to the data size (in bits)
+//    ppData   pointer to the data buffer
+//    pBN      BigNum ctx
+//
+*F*/
+IPPFUN(IppStatus, ippsRef_BN, (IppsBigNumSGN* pSgn, int* pBitSize, Ipp32u** const ppData,
+                               const IppsBigNumState *pBN))
+{
+   IPP_BAD_PTR1_RET(pBN);
+
+   pBN = (IppsBigNumState*)( IPP_ALIGNED_PTR(pBN, BN_ALIGNMENT) );
+   IPP_BADARG_RET(!BN_VALID_ID(pBN), ippStsContextMatchErr);
+
+   if(pSgn)
+      *pSgn = BN_SIGN(pBN);
+   if(pBitSize) {
+      cpSize bitLen = BITSIZE_BNU(BN_NUMBER(pBN), BN_SIZE(pBN));
+      *pBitSize = bitLen? bitLen : 1;
+   }
+
+   if(ppData)
+      *ppData = (Ipp32u*)BN_NUMBER(pBN);
+
+   return ippStsNoErr;
+}