123 lines
3.3 KiB
C
123 lines
3.3 KiB
C
/**
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* @file ecc_curve.c
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* @version $Format:%h%d$
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*
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* ECC curve data getter functions.
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*/
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/*
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* Copyright (c) 2013-2018 Rambus Inc.
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* Copyright (c) PeerSec Networks, 2002-2011
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* All Rights Reserved
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*
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* The latest version of this code is available at http://www.matrixssl.org
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*
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* This software is open source; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This General Public License does NOT permit incorporating this software
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* into proprietary programs. If you are unable to comply with the GPL, a
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* commercial license for this software may be purchased from Rambus at
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* http://www.rambus.com/
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*
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* This program is distributed in WITHOUT ANY WARRANTY; without even the
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* implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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* See the GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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* http://www.gnu.org/copyleft/gpl.html
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*/
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/******************************************************************************/
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#include "../cryptoImpl.h"
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# ifdef USE_ECC
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/******************************************************************************/
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/**
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ECC key size in bytes.
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@return Public key size in bytes if key->type is public, otherwise private size.
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@note ECC public keys are twice as many bytes as private keys.
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*/
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uint8_t psEccSize(const psEccKey_t *key)
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{
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if (key && key->curve)
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{
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return key->curve->size * 2;
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}
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return 0;
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}
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int32_t getEccParamByOid(uint32_t oid, const psEccCurve_t **curve)
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{
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int i = 0;
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*curve = NULL;
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while (eccCurves[i].size > 0)
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{
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if (oid == eccCurves[i].OIDsum)
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{
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*curve = &eccCurves[i];
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return 0;
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}
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i++;
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}
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return PS_FAIL;
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}
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int32_t getEccParamByName(const char *curveName,
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const psEccCurve_t **curve)
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{
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int i = 0;
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*curve = NULL;
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while (eccCurves[i].size > 0)
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{
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if (Strcmp(curveName, eccCurves[i].name) == 0)
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{
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*curve = &eccCurves[i];
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return 0;
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}
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i++;
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}
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return PS_FAIL;
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}
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/**
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Return a list of all supported curves.
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This method will put the largest bit strength first in the list, because
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of their order in the eccCurves[] array.
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*/
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void psGetEccCurveIdList(unsigned char *curveList, uint8_t *len)
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{
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psSize_t listLen = 0, i = 0;
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while (eccCurves[i].size > 0)
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{
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if (listLen < (*len - 2))
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{
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# if defined(USE_SM2) && defined(USE_SM3)
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if (eccCurves[i].curveId == IANA_CURVESM2)
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{
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curveList[listLen++] = (30 & 0xFF00) >> 8;
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curveList[listLen++] = 30 & 0xFF;
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}
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else
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# endif
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{
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curveList[listLen++] = (eccCurves[i].curveId & 0xFF00) >> 8;
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curveList[listLen++] = eccCurves[i].curveId & 0xFF;
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}
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}
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i++;
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}
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*len = listLen;
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}
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#endif /* USE_ECC */
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