85 lines
2.6 KiB
C
85 lines
2.6 KiB
C
/**
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* @file dh_export.c
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* @version $Format:%h%d$
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*
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* Diffie-Hellman: Public key export.
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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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#if defined USE_MATRIX_DH || defined USE_CL_DH
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/******************************************************************************/
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/**
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Export a public psDhKey_t struct to a raw binary format.
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@param pool Memory pool
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@param[in] key Pointer to DH key to export
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@param[out] out Pointer to buffer to write raw public DH key
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@param[in,out] outlen On input, the number of bytes available in 'out',
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on successful return, the number of bytes written to 'out'.
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@return < on failure
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*/
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int32_t psDhExportPubKey(psPool_t *pool, const psDhKey_t *key,
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unsigned char *out, psSize_t *outlen)
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{
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unsigned char *c;
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int16_t pad;
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int32_t rc;
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if (*outlen < key->size)
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{
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return PS_ARG_FAIL;
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}
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c = out;
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pad = key->size - pstm_unsigned_bin_size(&key->pub);
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if (pad > 0)
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{
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Memset(c, 0x0, pad);
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c += pad;
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}
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else if (pad < 0)
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{
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return PS_FAIL;
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}
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if ((rc = pstm_to_unsigned_bin(pool, &key->pub, c)) < 0)
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{
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return rc;
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}
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*outlen = key->size;
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return PS_SUCCESS;
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}
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#endif /* USE_MATRIX_DH || USE_CL_DH */
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/******************************************************************************/
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