mirror of
https://github.com/dolphin-emu/dolphin.git
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9872473f70
PolarSSL has been renamed to "mbed TLS" and version 2.0 dropped backwards compatibility. This commit adds only the necessary files without any modifications, so it doesn't compile yet.
374 lines
10 KiB
C
374 lines
10 KiB
C
/*
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* Public Key abstraction layer
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*
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* Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
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* SPDX-License-Identifier: Apache-2.0
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*
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* Licensed under the Apache License, Version 2.0 (the "License"); you may
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* not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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* This file is part of mbed TLS (https://tls.mbed.org)
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*/
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#if !defined(MBEDTLS_CONFIG_FILE)
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#include "mbedtls/config.h"
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#else
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#include MBEDTLS_CONFIG_FILE
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#endif
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#if defined(MBEDTLS_PK_C)
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#include "mbedtls/pk.h"
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#include "mbedtls/pk_internal.h"
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#if defined(MBEDTLS_RSA_C)
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#include "mbedtls/rsa.h"
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#endif
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#if defined(MBEDTLS_ECP_C)
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#include "mbedtls/ecp.h"
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#endif
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#if defined(MBEDTLS_ECDSA_C)
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#include "mbedtls/ecdsa.h"
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#endif
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/* Implementation that should never be optimized out by the compiler */
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static void mbedtls_zeroize( void *v, size_t n ) {
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volatile unsigned char *p = v; while( n-- ) *p++ = 0;
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}
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/*
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* Initialise a mbedtls_pk_context
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*/
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void mbedtls_pk_init( mbedtls_pk_context *ctx )
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{
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if( ctx == NULL )
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return;
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ctx->pk_info = NULL;
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ctx->pk_ctx = NULL;
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}
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/*
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* Free (the components of) a mbedtls_pk_context
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*/
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void mbedtls_pk_free( mbedtls_pk_context *ctx )
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{
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if( ctx == NULL || ctx->pk_info == NULL )
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return;
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ctx->pk_info->ctx_free_func( ctx->pk_ctx );
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mbedtls_zeroize( ctx, sizeof( mbedtls_pk_context ) );
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}
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/*
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* Get pk_info structure from type
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*/
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const mbedtls_pk_info_t * mbedtls_pk_info_from_type( mbedtls_pk_type_t pk_type )
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{
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switch( pk_type ) {
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#if defined(MBEDTLS_RSA_C)
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case MBEDTLS_PK_RSA:
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return( &mbedtls_rsa_info );
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#endif
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#if defined(MBEDTLS_ECP_C)
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case MBEDTLS_PK_ECKEY:
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return( &mbedtls_eckey_info );
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case MBEDTLS_PK_ECKEY_DH:
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return( &mbedtls_eckeydh_info );
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#endif
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#if defined(MBEDTLS_ECDSA_C)
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case MBEDTLS_PK_ECDSA:
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return( &mbedtls_ecdsa_info );
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#endif
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/* MBEDTLS_PK_RSA_ALT omitted on purpose */
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default:
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return( NULL );
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}
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}
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/*
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* Initialise context
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*/
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int mbedtls_pk_setup( mbedtls_pk_context *ctx, const mbedtls_pk_info_t *info )
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{
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if( ctx == NULL || info == NULL || ctx->pk_info != NULL )
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return( MBEDTLS_ERR_PK_BAD_INPUT_DATA );
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if( ( ctx->pk_ctx = info->ctx_alloc_func() ) == NULL )
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return( MBEDTLS_ERR_PK_ALLOC_FAILED );
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ctx->pk_info = info;
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return( 0 );
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}
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#if defined(MBEDTLS_PK_RSA_ALT_SUPPORT)
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/*
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* Initialize an RSA-alt context
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*/
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int mbedtls_pk_setup_rsa_alt( mbedtls_pk_context *ctx, void * key,
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mbedtls_pk_rsa_alt_decrypt_func decrypt_func,
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mbedtls_pk_rsa_alt_sign_func sign_func,
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mbedtls_pk_rsa_alt_key_len_func key_len_func )
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{
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mbedtls_rsa_alt_context *rsa_alt;
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const mbedtls_pk_info_t *info = &mbedtls_rsa_alt_info;
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if( ctx == NULL || ctx->pk_info != NULL )
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return( MBEDTLS_ERR_PK_BAD_INPUT_DATA );
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if( ( ctx->pk_ctx = info->ctx_alloc_func() ) == NULL )
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return( MBEDTLS_ERR_PK_ALLOC_FAILED );
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ctx->pk_info = info;
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rsa_alt = (mbedtls_rsa_alt_context *) ctx->pk_ctx;
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rsa_alt->key = key;
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rsa_alt->decrypt_func = decrypt_func;
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rsa_alt->sign_func = sign_func;
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rsa_alt->key_len_func = key_len_func;
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return( 0 );
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}
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#endif /* MBEDTLS_PK_RSA_ALT_SUPPORT */
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/*
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* Tell if a PK can do the operations of the given type
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*/
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int mbedtls_pk_can_do( const mbedtls_pk_context *ctx, mbedtls_pk_type_t type )
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{
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/* null or NONE context can't do anything */
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if( ctx == NULL || ctx->pk_info == NULL )
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return( 0 );
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return( ctx->pk_info->can_do( type ) );
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}
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/*
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* Helper for mbedtls_pk_sign and mbedtls_pk_verify
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*/
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static inline int pk_hashlen_helper( mbedtls_md_type_t md_alg, size_t *hash_len )
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{
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const mbedtls_md_info_t *md_info;
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if( *hash_len != 0 )
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return( 0 );
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if( ( md_info = mbedtls_md_info_from_type( md_alg ) ) == NULL )
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return( -1 );
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*hash_len = mbedtls_md_get_size( md_info );
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return( 0 );
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}
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/*
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* Verify a signature
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*/
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int mbedtls_pk_verify( mbedtls_pk_context *ctx, mbedtls_md_type_t md_alg,
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const unsigned char *hash, size_t hash_len,
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const unsigned char *sig, size_t sig_len )
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{
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if( ctx == NULL || ctx->pk_info == NULL ||
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pk_hashlen_helper( md_alg, &hash_len ) != 0 )
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return( MBEDTLS_ERR_PK_BAD_INPUT_DATA );
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if( ctx->pk_info->verify_func == NULL )
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return( MBEDTLS_ERR_PK_TYPE_MISMATCH );
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return( ctx->pk_info->verify_func( ctx->pk_ctx, md_alg, hash, hash_len,
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sig, sig_len ) );
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}
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/*
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* Verify a signature with options
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*/
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int mbedtls_pk_verify_ext( mbedtls_pk_type_t type, const void *options,
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mbedtls_pk_context *ctx, mbedtls_md_type_t md_alg,
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const unsigned char *hash, size_t hash_len,
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const unsigned char *sig, size_t sig_len )
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{
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if( ctx == NULL || ctx->pk_info == NULL )
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return( MBEDTLS_ERR_PK_BAD_INPUT_DATA );
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if( ! mbedtls_pk_can_do( ctx, type ) )
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return( MBEDTLS_ERR_PK_TYPE_MISMATCH );
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if( type == MBEDTLS_PK_RSASSA_PSS )
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{
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#if defined(MBEDTLS_RSA_C) && defined(MBEDTLS_PKCS1_V21)
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int ret;
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const mbedtls_pk_rsassa_pss_options *pss_opts;
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if( options == NULL )
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return( MBEDTLS_ERR_PK_BAD_INPUT_DATA );
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pss_opts = (const mbedtls_pk_rsassa_pss_options *) options;
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if( sig_len < mbedtls_pk_get_len( ctx ) )
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return( MBEDTLS_ERR_RSA_VERIFY_FAILED );
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ret = mbedtls_rsa_rsassa_pss_verify_ext( mbedtls_pk_rsa( *ctx ),
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NULL, NULL, MBEDTLS_RSA_PUBLIC,
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md_alg, (unsigned int) hash_len, hash,
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pss_opts->mgf1_hash_id,
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pss_opts->expected_salt_len,
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sig );
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if( ret != 0 )
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return( ret );
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if( sig_len > mbedtls_pk_get_len( ctx ) )
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return( MBEDTLS_ERR_PK_SIG_LEN_MISMATCH );
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return( 0 );
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#else
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return( MBEDTLS_ERR_PK_FEATURE_UNAVAILABLE );
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#endif
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}
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/* General case: no options */
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if( options != NULL )
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return( MBEDTLS_ERR_PK_BAD_INPUT_DATA );
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return( mbedtls_pk_verify( ctx, md_alg, hash, hash_len, sig, sig_len ) );
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}
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/*
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* Make a signature
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*/
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int mbedtls_pk_sign( mbedtls_pk_context *ctx, mbedtls_md_type_t md_alg,
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const unsigned char *hash, size_t hash_len,
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unsigned char *sig, size_t *sig_len,
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int (*f_rng)(void *, unsigned char *, size_t), void *p_rng )
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{
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if( ctx == NULL || ctx->pk_info == NULL ||
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pk_hashlen_helper( md_alg, &hash_len ) != 0 )
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return( MBEDTLS_ERR_PK_BAD_INPUT_DATA );
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if( ctx->pk_info->sign_func == NULL )
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return( MBEDTLS_ERR_PK_TYPE_MISMATCH );
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return( ctx->pk_info->sign_func( ctx->pk_ctx, md_alg, hash, hash_len,
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sig, sig_len, f_rng, p_rng ) );
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}
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/*
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* Decrypt message
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*/
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int mbedtls_pk_decrypt( mbedtls_pk_context *ctx,
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const unsigned char *input, size_t ilen,
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unsigned char *output, size_t *olen, size_t osize,
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int (*f_rng)(void *, unsigned char *, size_t), void *p_rng )
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{
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if( ctx == NULL || ctx->pk_info == NULL )
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return( MBEDTLS_ERR_PK_BAD_INPUT_DATA );
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if( ctx->pk_info->decrypt_func == NULL )
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return( MBEDTLS_ERR_PK_TYPE_MISMATCH );
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return( ctx->pk_info->decrypt_func( ctx->pk_ctx, input, ilen,
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output, olen, osize, f_rng, p_rng ) );
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}
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/*
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* Encrypt message
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*/
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int mbedtls_pk_encrypt( mbedtls_pk_context *ctx,
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const unsigned char *input, size_t ilen,
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unsigned char *output, size_t *olen, size_t osize,
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int (*f_rng)(void *, unsigned char *, size_t), void *p_rng )
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{
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if( ctx == NULL || ctx->pk_info == NULL )
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return( MBEDTLS_ERR_PK_BAD_INPUT_DATA );
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if( ctx->pk_info->encrypt_func == NULL )
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return( MBEDTLS_ERR_PK_TYPE_MISMATCH );
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return( ctx->pk_info->encrypt_func( ctx->pk_ctx, input, ilen,
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output, olen, osize, f_rng, p_rng ) );
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}
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/*
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* Check public-private key pair
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*/
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int mbedtls_pk_check_pair( const mbedtls_pk_context *pub, const mbedtls_pk_context *prv )
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{
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if( pub == NULL || pub->pk_info == NULL ||
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prv == NULL || prv->pk_info == NULL ||
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prv->pk_info->check_pair_func == NULL )
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{
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return( MBEDTLS_ERR_PK_BAD_INPUT_DATA );
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}
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if( prv->pk_info->type == MBEDTLS_PK_RSA_ALT )
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{
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if( pub->pk_info->type != MBEDTLS_PK_RSA )
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return( MBEDTLS_ERR_PK_TYPE_MISMATCH );
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}
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else
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{
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if( pub->pk_info != prv->pk_info )
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return( MBEDTLS_ERR_PK_TYPE_MISMATCH );
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}
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return( prv->pk_info->check_pair_func( pub->pk_ctx, prv->pk_ctx ) );
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}
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/*
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* Get key size in bits
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*/
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size_t mbedtls_pk_get_bitlen( const mbedtls_pk_context *ctx )
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{
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if( ctx == NULL || ctx->pk_info == NULL )
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return( 0 );
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return( ctx->pk_info->get_bitlen( ctx->pk_ctx ) );
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}
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/*
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* Export debug information
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*/
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int mbedtls_pk_debug( const mbedtls_pk_context *ctx, mbedtls_pk_debug_item *items )
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{
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if( ctx == NULL || ctx->pk_info == NULL )
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return( MBEDTLS_ERR_PK_BAD_INPUT_DATA );
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if( ctx->pk_info->debug_func == NULL )
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return( MBEDTLS_ERR_PK_TYPE_MISMATCH );
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ctx->pk_info->debug_func( ctx->pk_ctx, items );
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return( 0 );
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}
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/*
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* Access the PK type name
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*/
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const char *mbedtls_pk_get_name( const mbedtls_pk_context *ctx )
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{
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if( ctx == NULL || ctx->pk_info == NULL )
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return( "invalid PK" );
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return( ctx->pk_info->name );
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}
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/*
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* Access the PK type
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*/
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mbedtls_pk_type_t mbedtls_pk_get_type( const mbedtls_pk_context *ctx )
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{
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if( ctx == NULL || ctx->pk_info == NULL )
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return( MBEDTLS_PK_NONE );
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return( ctx->pk_info->type );
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}
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#endif /* MBEDTLS_PK_C */
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