mirror of
https://github.com/yuzu-emu/mbedtls.git
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127 lines
4.1 KiB
C
127 lines
4.1 KiB
C
/*
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* Copyright The Mbed TLS Contributors
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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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/**
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* \file common.h
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*
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* \brief Common functions and macros used by MPS
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*/
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#ifndef MBEDTLS_MPS_COMMON_H
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#define MBEDTLS_MPS_COMMON_H
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#include <stdio.h>
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/**
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* \name SECTION: MPS Configuration
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*
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* \{
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*/
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/*! This flag enables/disables assertions on the internal state of MPS.
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*
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* Assertions are sanity checks that should never trigger when MPS
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* is used within the bounds of its API and preconditions.
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*
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* Enabling this increases security by limiting the scope of
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* potential bugs, but comes at the cost of increased code size.
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*
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* Note: So far, there is no guiding principle as to what
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* expected conditions merit an assertion, and which don't.
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*
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* Comment this to disable assertions.
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*/
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#define MBEDTLS_MPS_ENABLE_ASSERTIONS
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/*! This flag controls whether tracing for MPS should be enabled. */
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//#define MBEDTLS_MPS_TRACE
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#if defined(MBEDTLS_MPS_ENABLE_ASSERTIONS)
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#define MBEDTLS_MPS_ASSERT_RAW( cond, string ) \
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do \
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{ \
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if( !(cond) ) \
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{ \
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TRACE( trace_error, string ); \
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RETURN( MBEDTLS_ERR_MPS_INTERNAL_ERROR ); \
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} \
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} while( 0 )
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#else /* MBEDTLS_MPS_ENABLE_ASSERTIONS */
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#define MBEDTLS_MPS_ASSERT_RAW( cond, string ) do {} while( 0 )
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#endif /* MBEDTLS_MPS_ENABLE_ASSERTIONS */
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/* \} name SECTION: MPS Configuration */
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/**
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* \name SECTION: Common types
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*
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* Various common types used throughout MPS.
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* \{
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*/
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/** \brief The type of buffer sizes and offsets used in MPS structures.
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*
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* This is an unsigned integer type that should be large enough to
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* hold the length of any buffer resp. message processed by MPS.
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*
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* The reason to pick a value as small as possible here is
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* to reduce the size of MPS structures.
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*
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* \warning Care has to be taken when using a narrower type
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* than ::mbedtls_mps_size_t here because of
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* potential truncation during conversion.
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*
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* \warning Handshake messages in TLS may be up to 2^24 ~ 16Mb in size.
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* If mbedtls_mps_[opt_]stored_size_t is smaller than that, the
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* maximum handshake message is restricted accordingly.
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*
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* For now, we use the default type of size_t throughout, and the use of
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* smaller types or different types for ::mbedtls_mps_size_t and
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* ::mbedtls_mps_stored_size_t is not yet supported.
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*
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*/
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typedef size_t mbedtls_mps_stored_size_t;
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#define MBEDTLS_MPS_SIZE_MAX ( (mbedtls_mps_size_t) -1 )
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/** \brief The type of buffer sizes and offsets used in the MPS API
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* and implementation.
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*
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* This must be at least as wide as ::mbedtls_stored_size_t but
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* may be chosen to be strictly larger if more suitable for the
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* target architecture.
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*
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* For example, in a test build for ARM Thumb, using uint_fast16_t
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* instead of uint16_t reduced the code size from 1060 Byte to 962 Byte,
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* so almost 10%.
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*/
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typedef size_t mbedtls_mps_size_t;
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#if (mbedtls_mps_size_t) -1 > (mbedtls_mps_stored_size_t) -1
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#error "Misconfiguration of mbedtls_mps_size_t and mbedtls_mps_stored_size_t."
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#endif
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/* \} SECTION: Common types */
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#endif /* MBEDTLS_MPS_COMMON_H */
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