mirror of
https://github.com/cuberite/polarssl.git
synced 2025-10-30 19:20:40 -04:00
288 lines
7.2 KiB
C
288 lines
7.2 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"
|
|
|
|
#if defined(POLARSSL_PK_C)
|
|
|
|
#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
|
|
|
|
/*
|
|
* Initialise a pk_context
|
|
*/
|
|
void pk_init( pk_context *ctx )
|
|
{
|
|
if( ctx == NULL )
|
|
return;
|
|
|
|
ctx->pk_info = NULL;
|
|
ctx->pk_ctx = NULL;
|
|
}
|
|
|
|
/*
|
|
* Free (the components of) a pk_context
|
|
*/
|
|
void pk_free( pk_context *ctx )
|
|
{
|
|
if( ctx == NULL || ctx->pk_info == NULL)
|
|
return;
|
|
|
|
ctx->pk_info->ctx_free_func( ctx->pk_ctx );
|
|
ctx->pk_ctx = NULL;
|
|
|
|
ctx->pk_info = NULL;
|
|
}
|
|
|
|
/*
|
|
* Get pk_info structure from type
|
|
*/
|
|
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
|
|
/* POLARSSL_PK_RSA_ALT ommited on purpose */
|
|
default:
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Initialise context
|
|
*/
|
|
int pk_init_ctx( pk_context *ctx, const pk_info_t *info )
|
|
{
|
|
if( ctx == NULL || info == NULL || ctx->pk_info != NULL )
|
|
return( POLARSSL_ERR_PK_BAD_INPUT_DATA );
|
|
|
|
if( ( ctx->pk_ctx = info->ctx_alloc_func() ) == NULL )
|
|
return( POLARSSL_ERR_PK_MALLOC_FAILED );
|
|
|
|
ctx->pk_info = info;
|
|
|
|
return( 0 );
|
|
}
|
|
|
|
/*
|
|
* Initialize an RSA-alt context
|
|
*/
|
|
int pk_init_ctx_rsa_alt( pk_context *ctx, void * key,
|
|
pk_rsa_alt_decrypt_func decrypt_func,
|
|
pk_rsa_alt_sign_func sign_func,
|
|
pk_rsa_alt_key_len_func key_len_func )
|
|
{
|
|
rsa_alt_context *rsa_alt;
|
|
const pk_info_t *info = &rsa_alt_info;
|
|
|
|
if( ctx == NULL || ctx->pk_info != NULL )
|
|
return( POLARSSL_ERR_PK_BAD_INPUT_DATA );
|
|
|
|
if( ( ctx->pk_ctx = info->ctx_alloc_func() ) == NULL )
|
|
return( POLARSSL_ERR_PK_MALLOC_FAILED );
|
|
|
|
ctx->pk_info = info;
|
|
|
|
rsa_alt = (rsa_alt_context *) ctx->pk_ctx;
|
|
|
|
rsa_alt->key = key;
|
|
rsa_alt->decrypt_func = decrypt_func;
|
|
rsa_alt->sign_func = sign_func;
|
|
rsa_alt->key_len_func = key_len_func;
|
|
|
|
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 or NONE context can't do anything */
|
|
if( ctx == NULL || ctx->pk_info == NULL )
|
|
return( 0 );
|
|
|
|
return( ctx->pk_info->can_do( type ) );
|
|
}
|
|
|
|
/*
|
|
* Helper for pk_sign and pk_verify
|
|
*/
|
|
static inline int pk_hashlen_helper( md_type_t md_alg, size_t *hash_len )
|
|
{
|
|
const md_info_t *md_info;
|
|
|
|
if( *hash_len != 0 )
|
|
return( 0 );
|
|
|
|
if( ( md_info = md_info_from_type( md_alg ) ) == NULL )
|
|
return( -1 );
|
|
|
|
*hash_len = md_info->size;
|
|
return( 0 );
|
|
}
|
|
|
|
/*
|
|
* Verify a signature
|
|
*/
|
|
int pk_verify( pk_context *ctx, md_type_t md_alg,
|
|
const unsigned char *hash, size_t hash_len,
|
|
const unsigned char *sig, size_t sig_len )
|
|
{
|
|
if( ctx == NULL || ctx->pk_info == NULL ||
|
|
pk_hashlen_helper( md_alg, &hash_len ) != 0 )
|
|
return( POLARSSL_ERR_PK_BAD_INPUT_DATA );
|
|
|
|
if( ctx->pk_info->verify_func == NULL )
|
|
return( POLARSSL_ERR_PK_TYPE_MISMATCH );
|
|
|
|
return( ctx->pk_info->verify_func( ctx->pk_ctx, md_alg, hash, hash_len,
|
|
sig, sig_len ) );
|
|
}
|
|
|
|
/*
|
|
* Make a signature
|
|
*/
|
|
int pk_sign( pk_context *ctx, md_type_t md_alg,
|
|
const unsigned char *hash, size_t hash_len,
|
|
unsigned char *sig, size_t *sig_len,
|
|
int (*f_rng)(void *, unsigned char *, size_t), void *p_rng )
|
|
{
|
|
if( ctx == NULL || ctx->pk_info == NULL ||
|
|
pk_hashlen_helper( md_alg, &hash_len ) != 0 )
|
|
return( POLARSSL_ERR_PK_BAD_INPUT_DATA );
|
|
|
|
if( ctx->pk_info->sign_func == NULL )
|
|
return( POLARSSL_ERR_PK_TYPE_MISMATCH );
|
|
|
|
return( ctx->pk_info->sign_func( ctx->pk_ctx, md_alg, hash, hash_len,
|
|
sig, sig_len, f_rng, p_rng ) );
|
|
}
|
|
|
|
/*
|
|
* Decrypt message
|
|
*/
|
|
int pk_decrypt( pk_context *ctx,
|
|
const unsigned char *input, size_t ilen,
|
|
unsigned char *output, size_t *olen, size_t osize,
|
|
int (*f_rng)(void *, unsigned char *, size_t), void *p_rng )
|
|
{
|
|
if( ctx == NULL || ctx->pk_info == NULL )
|
|
return( POLARSSL_ERR_PK_BAD_INPUT_DATA );
|
|
|
|
if( ctx->pk_info->decrypt_func == NULL )
|
|
return( POLARSSL_ERR_PK_TYPE_MISMATCH );
|
|
|
|
return( ctx->pk_info->decrypt_func( ctx->pk_ctx, input, ilen,
|
|
output, olen, osize, f_rng, p_rng ) );
|
|
}
|
|
|
|
/*
|
|
* Encrypt message
|
|
*/
|
|
int pk_encrypt( pk_context *ctx,
|
|
const unsigned char *input, size_t ilen,
|
|
unsigned char *output, size_t *olen, size_t osize,
|
|
int (*f_rng)(void *, unsigned char *, size_t), void *p_rng )
|
|
{
|
|
if( ctx == NULL || ctx->pk_info == NULL )
|
|
return( POLARSSL_ERR_PK_BAD_INPUT_DATA );
|
|
|
|
if( ctx->pk_info->encrypt_func == NULL )
|
|
return( POLARSSL_ERR_PK_TYPE_MISMATCH );
|
|
|
|
return( ctx->pk_info->encrypt_func( ctx->pk_ctx, input, ilen,
|
|
output, olen, osize, f_rng, p_rng ) );
|
|
}
|
|
|
|
/*
|
|
* Get key size in bits
|
|
*/
|
|
size_t pk_get_size( const pk_context *ctx )
|
|
{
|
|
if( ctx == NULL || ctx->pk_info == NULL )
|
|
return( 0 );
|
|
|
|
return( ctx->pk_info->get_size( ctx->pk_ctx ) );
|
|
}
|
|
|
|
/*
|
|
* Export debug information
|
|
*/
|
|
int pk_debug( const pk_context *ctx, pk_debug_item *items )
|
|
{
|
|
if( ctx == NULL || ctx->pk_info == NULL )
|
|
return( POLARSSL_ERR_PK_BAD_INPUT_DATA );
|
|
|
|
ctx->pk_info->debug_func( ctx->pk_ctx, items );
|
|
return( 0 );
|
|
}
|
|
|
|
/*
|
|
* Access the PK type name
|
|
*/
|
|
const char * pk_get_name( const pk_context *ctx )
|
|
{
|
|
if( ctx == NULL || ctx->pk_info == NULL )
|
|
return( "invalid PK" );
|
|
|
|
return( ctx->pk_info->name );
|
|
}
|
|
|
|
/*
|
|
* Access the PK type
|
|
*/
|
|
pk_type_t pk_get_type( const pk_context *ctx )
|
|
{
|
|
if( ctx == NULL || ctx->pk_info == NULL )
|
|
return( POLARSSL_PK_NONE );
|
|
|
|
return( ctx->pk_info->type );
|
|
}
|
|
|
|
#endif /* POLARSSL_PK_C */
|