1 /*******************************************************************************
2 * Copyright 2010-2018 Intel Corporation
3 * All Rights Reserved.
4 *
5 * If this software was obtained under the Intel Simplified Software License,
6 * the following terms apply:
7 *
8 * The source code, information and material ("Material") contained herein is
9 * owned by Intel Corporation or its suppliers or licensors, and title to such
10 * Material remains with Intel Corporation or its suppliers or licensors. The
11 * Material contains proprietary information of Intel or its suppliers and
12 * licensors. The Material is protected by worldwide copyright laws and treaty
13 * provisions. No part of the Material may be used, copied, reproduced,
14 * modified, published, uploaded, posted, transmitted, distributed or disclosed
15 * in any way without Intel's prior express written permission. No license under
16 * any patent, copyright or other intellectual property rights in the Material
17 * is granted to or conferred upon you, either expressly, by implication,
18 * inducement, estoppel or otherwise. Any license under such intellectual
19 * property rights must be express and approved by Intel in writing.
20 *
21 * Unless otherwise agreed by Intel in writing, you may not remove or alter this
22 * notice or any other notice embedded in Materials by Intel or Intel's
23 * suppliers or licensors in any way.
24 *
25 *
26 * If this software was obtained under the Apache License, Version 2.0 (the
27 * "License"), the following terms apply:
28 *
29 * You may not use this file except in compliance with the License. You may
30 * obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0
31 *
32 *
33 * Unless required by applicable law or agreed to in writing, software
34 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
35 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
36 *
37 * See the License for the specific language governing permissions and
38 * limitations under the License.
39 *******************************************************************************/
40
41 /*
42 // Intel(R) Integrated Performance Primitives. Cryptography Primitives.
43 // EC over GF(p^m) definitinons
44 //
45 // Context:
46 // cpGFpECGetSize()
47 //
48 */
49
50 #include "owndefs.h"
51 #include "owncp.h"
52 #include "pcpgfpecstuff.h"
53 #include "pcpeccp.h"
54
55
cpGFpECGetSize(int basicDeg,int basicElmBitSize)56 int cpGFpECGetSize(int basicDeg, int basicElmBitSize)
57 {
58 int ctxSize = 0;
59 int elemLen = basicDeg*BITS_BNU_CHUNK(basicElmBitSize);
60
61 int maxOrderBits = 1+ basicDeg*basicElmBitSize;
62 #if defined(_LEGACY_ECCP_SUPPORT_)
63 int maxOrderLen = BITS_BNU_CHUNK(maxOrderBits);
64 #endif
65
66 int modEngineCtxSize;
67 if(ippStsNoErr==gsModEngineGetSize(maxOrderBits, MONT_DEFAULT_POOL_LENGTH, &modEngineCtxSize)) {
68
69 ctxSize = sizeof(IppsGFpECState)
70 +elemLen*sizeof(BNU_CHUNK_T) /* EC coeff A */
71 +elemLen*sizeof(BNU_CHUNK_T) /* EC coeff B */
72 +elemLen*sizeof(BNU_CHUNK_T) /* generator G.x */
73 +elemLen*sizeof(BNU_CHUNK_T) /* generator G.y */
74 +elemLen*sizeof(BNU_CHUNK_T) /* generator G.z */
75 +modEngineCtxSize /* mont engine (R) */
76 +elemLen*sizeof(BNU_CHUNK_T) /* cofactor */
77 #if defined(_LEGACY_ECCP_SUPPORT_)
78 +2*elemLen*3*sizeof(BNU_CHUNK_T) /* regular and ephemeral public keys */
79 +2*maxOrderLen*sizeof(BNU_CHUNK_T) /* regular and ephemeral private keys */
80 #endif
81 +elemLen*sizeof(BNU_CHUNK_T)*3*EC_POOL_SIZE;
82 }
83 return ctxSize;
84 }
85