mbedtls/library/pk.c
Manuel Pégourié-Gonnard c6ac8870d5 Nicer interface between PK and debug.
Finally get rid of pk_context.type member, too.
2013-08-20 20:46:04 +02:00

174 lines
3.9 KiB
C

/*
* Public Key abstraction layer
*
* Copyright (C) 2006-2013, Brainspark B.V.
*
* This file is part of PolarSSL (http://www.polarssl.org)
* Lead Maintainer: Paul Bakker <polarssl_maintainer at polarssl.org>
*
* All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "polarssl/config.h"
#include "polarssl/pk.h"
#include "polarssl/pk_wrap.h"
#if defined(POLARSSL_RSA_C)
#include "polarssl/rsa.h"
#endif
#if defined(POLARSSL_ECP_C)
#include "polarssl/ecp.h"
#endif
#if defined(POLARSSL_ECDSA_C)
#include "polarssl/ecdsa.h"
#endif
#if defined(POLARSSL_MEMORY_C)
#include "polarssl/memory.h"
#else
#define polarssl_malloc malloc
#define polarssl_free free
#endif
#include <stdlib.h>
/*
* Initialise a pk_context
*/
void pk_init( pk_context *ctx )
{
if( ctx == NULL )
return;
ctx->info = NULL;
ctx->data = NULL;
}
/*
* Free (the components of) a pk_context
*/
void pk_free( pk_context *ctx )
{
if( ctx == NULL || ctx->info == NULL)
return;
ctx->info->ctx_free_func( ctx->data );
ctx->data = NULL;
ctx->info = NULL;
}
/*
* Get pk_info structure from type
*/
static const pk_info_t * pk_info_from_type( pk_type_t pk_type )
{
switch( pk_type ) {
#if defined(POLARSSL_RSA_C)
case POLARSSL_PK_RSA:
return &rsa_info;
#endif
#if defined(POLARSSL_ECP_C)
case POLARSSL_PK_ECKEY:
return &eckey_info;
case POLARSSL_PK_ECKEY_DH:
return &eckeydh_info;
#endif
#if defined(POLARSSL_ECDSA_C)
case POLARSSL_PK_ECDSA:
return &ecdsa_info;
#endif
default:
return NULL;
}
}
/*
* Set a pk_context to a given type
*/
int pk_set_type( pk_context *ctx, pk_type_t type )
{
const pk_info_t *info;
if( ctx->info != NULL )
{
if( ctx->info->type == type )
return 0;
return( POLARSSL_ERR_PK_TYPE_MISMATCH );
}
if( ( info = pk_info_from_type( type ) ) == NULL )
return( POLARSSL_ERR_PK_TYPE_MISMATCH );
if( ( ctx->data = info->ctx_alloc_func() ) == NULL )
return( POLARSSL_ERR_PK_MALLOC_FAILED );
ctx->info = info;
return( 0 );
}
/*
* Tell if a PK can do the operations of the given type
*/
int pk_can_do( pk_context *ctx, pk_type_t type )
{
/* null of NONE context can't do anything */
if( ctx == NULL || ctx->info == NULL )
return( 0 );
return( ctx->info->can_do( type ) );
}
/*
* Verify a signature
*/
int pk_verify( pk_context *ctx,
const unsigned char *hash, const md_info_t *md_info,
const unsigned char *sig, size_t sig_len )
{
if( ctx == NULL || ctx->info == NULL )
return( POLARSSL_ERR_PK_TYPE_MISMATCH ); // TODO
return( ctx->info->verify_func( ctx->data, hash, md_info, sig, sig_len ) );
}
/*
* Get key size in bits
*/
size_t pk_get_size( const pk_context *ctx )
{
if( ctx == NULL || ctx->info == NULL )
return( 0 );
return( ctx->info->get_size( ctx->data ) );
}
/*
* Export debug information
*/
int pk_debug( const pk_context *ctx, pk_debug_item *items )
{
if( ctx == NULL || ctx->info == NULL )
return( POLARSSL_ERR_PK_TYPE_MISMATCH ); // TODO
ctx->info->debug_func( ctx->data, items );
return( 0 );
}