aboutsummaryrefslogtreecommitdiff
path: root/ext/ipp/sources/ippcp/pcpgfpecgetpointoctstring.c
diff options
context:
space:
mode:
Diffstat (limited to 'ext/ipp/sources/ippcp/pcpgfpecgetpointoctstring.c')
-rw-r--r--ext/ipp/sources/ippcp/pcpgfpecgetpointoctstring.c107
1 files changed, 107 insertions, 0 deletions
diff --git a/ext/ipp/sources/ippcp/pcpgfpecgetpointoctstring.c b/ext/ipp/sources/ippcp/pcpgfpecgetpointoctstring.c
new file mode 100644
index 0000000..a47ec18
--- /dev/null
+++ b/ext/ipp/sources/ippcp/pcpgfpecgetpointoctstring.c
@@ -0,0 +1,107 @@
+/*******************************************************************************
+* Copyright 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.
+*******************************************************************************/
+
+/*
+//
+// Purpose:
+// Intel(R) Integrated Performance Primitives. Cryptography Primitives.
+// EC over GF(p) Operations
+//
+// Context:
+// ippsGFpECGetPointOctString()
+//
+*/
+#include "pcpgfpecessm2.h"
+#include "pcpgfpecstuff.h"
+
+/*F*
+// Name: ippsGFpECGetPointOctString
+//
+// Purpose: Converts a point on EC into x||y octstring
+//
+// Returns: Reason:
+// ippStsNullPtrErr pPoint == NULL / pEC == NULL / pStr == NULL
+// ippStsContextMatchErr pEC, pPoint invalid context
+// ippStsNotSupportedModeErr pGFE->extdegree > 1
+// ippStsSizeErr strLen is not equal to double GFp element
+// ippStsOutOfRangeErr the point does not belong to the EC
+// ippStsPointAtInfinity a point on infinity cannot be converted to a string
+// ippStsNoErr no errors
+//
+// Parameters:
+// pStr pointer to the string to read from
+// strLen length of the string
+// pPoint pointer to output point
+// pEC EC ctx
+//
+*F*/
+IPPFUN(IppStatus, ippsGFpECGetPointOctString, (const IppsGFpECPoint* pPoint,
+ Ipp8u* pStr, int strLen, IppsGFpECState* pEC)) {
+ IPP_BAD_PTR3_RET(pPoint, pEC, pStr);
+ IPP_BADARG_RET(pPoint->idCtx != idCtxGFPPoint, ippStsContextMatchErr);
+ IPP_BADARG_RET(pEC->idCtx != idCtxGFPEC, ippStsContextMatchErr);
+ IPP_BADARG_RET(!pEC->subgroup, ippStsContextMatchErr);
+ IPP_BADARG_RET(1 < pEC->pGF->pGFE->extdegree, ippStsNotSupportedModeErr);
+
+ {
+ gsModEngine* pGFE = pEC->pGF->pGFE;
+ int elemLen = BITS2WORD8_SIZE(pGFE->modBitLen);
+ IPP_BADARG_RET(strLen != elemLen * 2, ippStsSizeErr);
+ IPP_BADARG_RET(pPoint->elementSize != pGFE->modLen, ippStsOutOfRangeErr);
+
+ {
+ int finitePoint;
+ IppsGFpElement ptX, ptY;
+
+ cpGFpElementConstruct(&ptX, cpGFpGetPool(1, pGFE), pGFE->modLen);
+ cpGFpElementConstruct(&ptY, cpGFpGetPool(1, pGFE), pGFE->modLen);
+ finitePoint = gfec_GetPoint(ptX.pData, ptY.pData, pPoint, pEC);
+ if (finitePoint) {
+ ippsGFpGetElementOctString(&ptX, pStr, elemLen, pEC->pGF);
+ pStr += elemLen;
+ ippsGFpGetElementOctString(&ptY, pStr, elemLen, pEC->pGF);
+ }
+
+ cpGFpReleasePool(2, pGFE); /* release ptX and ptY from the pool */
+
+ return finitePoint ? ippStsNoErr : ippStsPointAtInfinity;
+ }
+ }
+}