144 lines
3.3 KiB
C
144 lines
3.3 KiB
C
/*
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* Public Key abstraction layer
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*
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* Copyright (C) 2006-2013, Brainspark B.V.
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*
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* This file is part of PolarSSL (http://www.polarssl.org)
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* Lead Maintainer: Paul Bakker <polarssl_maintainer at polarssl.org>
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*
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* All rights reserved.
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*
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* This program is free software; 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 program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* 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 along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include "polarssl/config.h"
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#include "polarssl/pk.h"
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#if defined(POLARSSL_RSA_C)
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#include "polarssl/rsa.h"
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#endif
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#if defined(POLARSSL_ECP_C)
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#include "polarssl/ecp.h"
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#endif
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#if defined(POLARSSL_ECDSA_C)
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#include "polarssl/ecdsa.h"
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#endif
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#include <stdlib.h>
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/*
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* Initialise a pk_context
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*/
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void pk_init( pk_context *ctx )
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{
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if( ctx == NULL )
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return;
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ctx->type = POLARSSL_PK_NONE;
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ctx->data = NULL;
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ctx->dont_free = 0;
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}
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/*
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* Free (the components of) a pk_context
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*/
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void pk_free( pk_context *ctx )
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{
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if( ctx == NULL )
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return;
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#if defined(POLARSSL_RSA_C)
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if( ctx->type == POLARSSL_PK_RSA )
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rsa_free( ctx->data );
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else
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#endif
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#if defined(POLARSSL_ECP_C)
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if( ctx->type == POLARSSL_PK_ECKEY || ctx->type == POLARSSL_PK_ECKEY_DH )
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ecp_keypair_free( ctx->data );
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else
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#endif
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#if defined(POLARSSL_ECDSA_C)
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if( ctx->type == POLARSSL_PK_ECDSA )
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ecdsa_free( ctx->data );
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else
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#endif
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{
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; /* guard for the else's above */
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}
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if( ! ctx->dont_free )
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free( ctx->data );
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ctx->type = POLARSSL_PK_NONE;
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ctx->data = NULL;
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}
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/*
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* Set a pk_context to a given type
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*/
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int pk_set_type( pk_context *ctx, pk_type_t type )
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{
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size_t size;
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if( ctx->type == type )
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return( 0 );
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if( ctx->type != POLARSSL_PK_NONE )
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return( POLARSSL_ERR_PK_TYPE_MISMATCH );
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#if defined(POLARSSL_RSA_C)
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if( type == POLARSSL_PK_RSA )
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size = sizeof( rsa_context );
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else
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#endif
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#if defined(POLARSSL_ECP_C)
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if( type == POLARSSL_PK_ECKEY || type == POLARSSL_PK_ECKEY_DH )
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size = sizeof( ecp_keypair );
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else
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#endif
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#if defined(POLARSSL_ECDSA_C)
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if( type == POLARSSL_PK_ECDSA )
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size = sizeof( ecdsa_context );
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else
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#endif
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return( POLARSSL_ERR_PK_TYPE_MISMATCH );
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if( ( ctx->data = malloc( size ) ) == NULL )
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return( POLARSSL_ERR_PK_MALLOC_FAILED );
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memset( ctx->data, 0, size );
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ctx->type = type;
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return( 0 );
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}
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#if defined(POLARSSL_RSA_C)
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/*
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* Wrap an RSA context in a PK context
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*/
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int pk_wrap_rsa( pk_context *ctx, const rsa_context *rsa)
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{
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if( ctx->type != POLARSSL_PK_NONE )
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return( POLARSSL_ERR_PK_TYPE_MISMATCH );
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ctx->type = POLARSSL_PK_RSA;
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ctx->data = (rsa_context *) rsa;
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ctx->dont_free = 1;
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return( 0 );
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}
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#endif
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