d76a26e086
Keep applying the windows entropy patch (UWP support).
Remove no longer needed padlock patch.
Update thirdparty README to reflect changes, and new source inclusion
criteria.
(cherry picked from commit e375cbd094)
386 lines
11 KiB
C
386 lines
11 KiB
C
/*
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* Platform abstraction layer
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*
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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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#include "common.h"
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#if defined(MBEDTLS_PLATFORM_C)
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#include "mbedtls/platform.h"
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#include "mbedtls/platform_util.h"
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#include "mbedtls/error.h"
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/* The compile time configuration of memory allocation via the macros
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* MBEDTLS_PLATFORM_{FREE/CALLOC}_MACRO takes precedence over the runtime
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* configuration via mbedtls_platform_set_calloc_free(). So, omit everything
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* related to the latter if MBEDTLS_PLATFORM_{FREE/CALLOC}_MACRO are defined. */
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#if defined(MBEDTLS_PLATFORM_MEMORY) && \
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!( defined(MBEDTLS_PLATFORM_CALLOC_MACRO) && \
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defined(MBEDTLS_PLATFORM_FREE_MACRO) )
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#if !defined(MBEDTLS_PLATFORM_STD_CALLOC)
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static void *platform_calloc_uninit( size_t n, size_t size )
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{
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((void) n);
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((void) size);
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return( NULL );
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}
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#define MBEDTLS_PLATFORM_STD_CALLOC platform_calloc_uninit
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#endif /* !MBEDTLS_PLATFORM_STD_CALLOC */
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#if !defined(MBEDTLS_PLATFORM_STD_FREE)
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static void platform_free_uninit( void *ptr )
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{
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((void) ptr);
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}
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#define MBEDTLS_PLATFORM_STD_FREE platform_free_uninit
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#endif /* !MBEDTLS_PLATFORM_STD_FREE */
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static void * (*mbedtls_calloc_func)( size_t, size_t ) = MBEDTLS_PLATFORM_STD_CALLOC;
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static void (*mbedtls_free_func)( void * ) = MBEDTLS_PLATFORM_STD_FREE;
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void * mbedtls_calloc( size_t nmemb, size_t size )
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{
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return (*mbedtls_calloc_func)( nmemb, size );
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}
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void mbedtls_free( void * ptr )
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{
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(*mbedtls_free_func)( ptr );
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}
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int mbedtls_platform_set_calloc_free( void * (*calloc_func)( size_t, size_t ),
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void (*free_func)( void * ) )
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{
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mbedtls_calloc_func = calloc_func;
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mbedtls_free_func = free_func;
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return( 0 );
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}
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#endif /* MBEDTLS_PLATFORM_MEMORY &&
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!( defined(MBEDTLS_PLATFORM_CALLOC_MACRO) &&
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defined(MBEDTLS_PLATFORM_FREE_MACRO) ) */
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#if defined(MBEDTLS_PLATFORM_HAS_NON_CONFORMING_SNPRINTF)
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#include <stdarg.h>
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int mbedtls_platform_win32_snprintf( char *s, size_t n, const char *fmt, ... )
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{
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int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
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va_list argp;
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va_start( argp, fmt );
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ret = mbedtls_vsnprintf( s, n, fmt, argp );
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va_end( argp );
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return( ret );
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}
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#endif
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#if defined(MBEDTLS_PLATFORM_SNPRINTF_ALT)
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#if !defined(MBEDTLS_PLATFORM_STD_SNPRINTF)
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/*
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* Make dummy function to prevent NULL pointer dereferences
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*/
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static int platform_snprintf_uninit( char * s, size_t n,
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const char * format, ... )
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{
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((void) s);
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((void) n);
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((void) format);
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return( 0 );
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}
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#define MBEDTLS_PLATFORM_STD_SNPRINTF platform_snprintf_uninit
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#endif /* !MBEDTLS_PLATFORM_STD_SNPRINTF */
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int (*mbedtls_snprintf)( char * s, size_t n,
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const char * format,
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... ) = MBEDTLS_PLATFORM_STD_SNPRINTF;
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int mbedtls_platform_set_snprintf( int (*snprintf_func)( char * s, size_t n,
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const char * format,
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... ) )
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{
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mbedtls_snprintf = snprintf_func;
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return( 0 );
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}
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#endif /* MBEDTLS_PLATFORM_SNPRINTF_ALT */
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#if defined(MBEDTLS_PLATFORM_HAS_NON_CONFORMING_VSNPRINTF)
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#include <stdarg.h>
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int mbedtls_platform_win32_vsnprintf( char *s, size_t n, const char *fmt, va_list arg )
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{
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int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
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/* Avoid calling the invalid parameter handler by checking ourselves */
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if( s == NULL || n == 0 || fmt == NULL )
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return( -1 );
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#if defined(_TRUNCATE)
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ret = vsnprintf_s( s, n, _TRUNCATE, fmt, arg );
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#else
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ret = vsnprintf( s, n, fmt, arg );
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if( ret < 0 || (size_t) ret == n )
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{
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s[n-1] = '\0';
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ret = -1;
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}
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#endif
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return( ret );
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}
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#endif
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#if defined(MBEDTLS_PLATFORM_VSNPRINTF_ALT)
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#if !defined(MBEDTLS_PLATFORM_STD_VSNPRINTF)
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/*
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* Make dummy function to prevent NULL pointer dereferences
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*/
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static int platform_vsnprintf_uninit( char * s, size_t n,
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const char * format, va_list arg )
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{
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((void) s);
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((void) n);
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((void) format);
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((void) arg);
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return( -1 );
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}
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#define MBEDTLS_PLATFORM_STD_VSNPRINTF platform_vsnprintf_uninit
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#endif /* !MBEDTLS_PLATFORM_STD_VSNPRINTF */
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int (*mbedtls_vsnprintf)( char * s, size_t n,
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const char * format,
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va_list arg ) = MBEDTLS_PLATFORM_STD_VSNPRINTF;
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int mbedtls_platform_set_vsnprintf( int (*vsnprintf_func)( char * s, size_t n,
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const char * format,
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va_list arg ) )
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{
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mbedtls_vsnprintf = vsnprintf_func;
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return( 0 );
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}
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#endif /* MBEDTLS_PLATFORM_VSNPRINTF_ALT */
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#if defined(MBEDTLS_PLATFORM_PRINTF_ALT)
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#if !defined(MBEDTLS_PLATFORM_STD_PRINTF)
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/*
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* Make dummy function to prevent NULL pointer dereferences
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*/
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static int platform_printf_uninit( const char *format, ... )
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{
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((void) format);
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return( 0 );
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}
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#define MBEDTLS_PLATFORM_STD_PRINTF platform_printf_uninit
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#endif /* !MBEDTLS_PLATFORM_STD_PRINTF */
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int (*mbedtls_printf)( const char *, ... ) = MBEDTLS_PLATFORM_STD_PRINTF;
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int mbedtls_platform_set_printf( int (*printf_func)( const char *, ... ) )
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{
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mbedtls_printf = printf_func;
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return( 0 );
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}
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#endif /* MBEDTLS_PLATFORM_PRINTF_ALT */
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#if defined(MBEDTLS_PLATFORM_FPRINTF_ALT)
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#if !defined(MBEDTLS_PLATFORM_STD_FPRINTF)
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/*
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* Make dummy function to prevent NULL pointer dereferences
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*/
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static int platform_fprintf_uninit( FILE *stream, const char *format, ... )
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{
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((void) stream);
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((void) format);
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return( 0 );
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}
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#define MBEDTLS_PLATFORM_STD_FPRINTF platform_fprintf_uninit
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#endif /* !MBEDTLS_PLATFORM_STD_FPRINTF */
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int (*mbedtls_fprintf)( FILE *, const char *, ... ) =
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MBEDTLS_PLATFORM_STD_FPRINTF;
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int mbedtls_platform_set_fprintf( int (*fprintf_func)( FILE *, const char *, ... ) )
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{
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mbedtls_fprintf = fprintf_func;
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return( 0 );
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}
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#endif /* MBEDTLS_PLATFORM_FPRINTF_ALT */
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#if defined(MBEDTLS_PLATFORM_EXIT_ALT)
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#if !defined(MBEDTLS_PLATFORM_STD_EXIT)
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/*
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* Make dummy function to prevent NULL pointer dereferences
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*/
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static void platform_exit_uninit( int status )
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{
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((void) status);
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}
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#define MBEDTLS_PLATFORM_STD_EXIT platform_exit_uninit
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#endif /* !MBEDTLS_PLATFORM_STD_EXIT */
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void (*mbedtls_exit)( int status ) = MBEDTLS_PLATFORM_STD_EXIT;
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int mbedtls_platform_set_exit( void (*exit_func)( int status ) )
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{
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mbedtls_exit = exit_func;
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return( 0 );
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}
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#endif /* MBEDTLS_PLATFORM_EXIT_ALT */
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#if defined(MBEDTLS_HAVE_TIME)
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#if defined(MBEDTLS_PLATFORM_TIME_ALT)
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#if !defined(MBEDTLS_PLATFORM_STD_TIME)
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/*
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* Make dummy function to prevent NULL pointer dereferences
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*/
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static mbedtls_time_t platform_time_uninit( mbedtls_time_t* timer )
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{
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((void) timer);
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return( 0 );
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}
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#define MBEDTLS_PLATFORM_STD_TIME platform_time_uninit
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#endif /* !MBEDTLS_PLATFORM_STD_TIME */
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mbedtls_time_t (*mbedtls_time)( mbedtls_time_t* timer ) = MBEDTLS_PLATFORM_STD_TIME;
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int mbedtls_platform_set_time( mbedtls_time_t (*time_func)( mbedtls_time_t* timer ) )
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{
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mbedtls_time = time_func;
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return( 0 );
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}
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#endif /* MBEDTLS_PLATFORM_TIME_ALT */
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#endif /* MBEDTLS_HAVE_TIME */
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#if defined(MBEDTLS_ENTROPY_NV_SEED)
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#if !defined(MBEDTLS_PLATFORM_NO_STD_FUNCTIONS) && defined(MBEDTLS_FS_IO)
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/* Default implementations for the platform independent seed functions use
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* standard libc file functions to read from and write to a pre-defined filename
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*/
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int mbedtls_platform_std_nv_seed_read( unsigned char *buf, size_t buf_len )
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{
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FILE *file;
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size_t n;
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if( ( file = fopen( MBEDTLS_PLATFORM_STD_NV_SEED_FILE, "rb" ) ) == NULL )
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return( -1 );
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if( ( n = fread( buf, 1, buf_len, file ) ) != buf_len )
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{
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fclose( file );
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mbedtls_platform_zeroize( buf, buf_len );
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return( -1 );
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}
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fclose( file );
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return( (int)n );
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}
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int mbedtls_platform_std_nv_seed_write( unsigned char *buf, size_t buf_len )
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{
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FILE *file;
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size_t n;
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if( ( file = fopen( MBEDTLS_PLATFORM_STD_NV_SEED_FILE, "w" ) ) == NULL )
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return -1;
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if( ( n = fwrite( buf, 1, buf_len, file ) ) != buf_len )
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{
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fclose( file );
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return -1;
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}
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fclose( file );
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return( (int)n );
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}
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#endif /* MBEDTLS_PLATFORM_NO_STD_FUNCTIONS */
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#if defined(MBEDTLS_PLATFORM_NV_SEED_ALT)
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#if !defined(MBEDTLS_PLATFORM_STD_NV_SEED_READ)
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/*
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* Make dummy function to prevent NULL pointer dereferences
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*/
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static int platform_nv_seed_read_uninit( unsigned char *buf, size_t buf_len )
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{
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((void) buf);
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((void) buf_len);
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return( -1 );
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}
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#define MBEDTLS_PLATFORM_STD_NV_SEED_READ platform_nv_seed_read_uninit
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#endif /* !MBEDTLS_PLATFORM_STD_NV_SEED_READ */
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#if !defined(MBEDTLS_PLATFORM_STD_NV_SEED_WRITE)
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/*
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* Make dummy function to prevent NULL pointer dereferences
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*/
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static int platform_nv_seed_write_uninit( unsigned char *buf, size_t buf_len )
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{
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((void) buf);
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((void) buf_len);
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return( -1 );
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}
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#define MBEDTLS_PLATFORM_STD_NV_SEED_WRITE platform_nv_seed_write_uninit
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#endif /* !MBEDTLS_PLATFORM_STD_NV_SEED_WRITE */
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int (*mbedtls_nv_seed_read)( unsigned char *buf, size_t buf_len ) =
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MBEDTLS_PLATFORM_STD_NV_SEED_READ;
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int (*mbedtls_nv_seed_write)( unsigned char *buf, size_t buf_len ) =
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MBEDTLS_PLATFORM_STD_NV_SEED_WRITE;
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int mbedtls_platform_set_nv_seed(
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int (*nv_seed_read_func)( unsigned char *buf, size_t buf_len ),
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int (*nv_seed_write_func)( unsigned char *buf, size_t buf_len ) )
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{
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mbedtls_nv_seed_read = nv_seed_read_func;
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mbedtls_nv_seed_write = nv_seed_write_func;
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return( 0 );
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}
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#endif /* MBEDTLS_PLATFORM_NV_SEED_ALT */
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#endif /* MBEDTLS_ENTROPY_NV_SEED */
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#if !defined(MBEDTLS_PLATFORM_SETUP_TEARDOWN_ALT)
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/*
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* Placeholder platform setup that does nothing by default
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*/
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int mbedtls_platform_setup( mbedtls_platform_context *ctx )
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{
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(void)ctx;
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return( 0 );
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}
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/*
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* Placeholder platform teardown that does nothing by default
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*/
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void mbedtls_platform_teardown( mbedtls_platform_context *ctx )
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{
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(void)ctx;
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}
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#endif /* MBEDTLS_PLATFORM_SETUP_TEARDOWN_ALT */
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#endif /* MBEDTLS_PLATFORM_C */
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