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Diffstat (limited to 'thirdparty/mbedtls/library/platform.c')
| -rw-r--r-- | thirdparty/mbedtls/library/platform.c | 336 |
1 files changed, 336 insertions, 0 deletions
diff --git a/thirdparty/mbedtls/library/platform.c b/thirdparty/mbedtls/library/platform.c new file mode 100644 index 0000000000..76df7fac18 --- /dev/null +++ b/thirdparty/mbedtls/library/platform.c @@ -0,0 +1,336 @@ +/* + * Platform abstraction layer + * + * Copyright (C) 2006-2016, ARM Limited, All Rights Reserved + * SPDX-License-Identifier: Apache-2.0 + * + * Licensed under the Apache License, Version 2.0 (the "License"); you may + * not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT + * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + * + * This file is part of mbed TLS (https://tls.mbed.org) + */ + +#if !defined(MBEDTLS_CONFIG_FILE) +#include "mbedtls/config.h" +#else +#include MBEDTLS_CONFIG_FILE +#endif + +#if defined(MBEDTLS_PLATFORM_C) + +#include "mbedtls/platform.h" + +#if defined(MBEDTLS_ENTROPY_NV_SEED) && \ + !defined(MBEDTLS_PLATFORM_NO_STD_FUNCTIONS) && defined(MBEDTLS_FS_IO) +/* Implementation that should never be optimized out by the compiler */ +static void mbedtls_zeroize( void *v, size_t n ) { + volatile unsigned char *p = (unsigned char*)v; while( n-- ) *p++ = 0; +} +#endif + +#if defined(MBEDTLS_PLATFORM_MEMORY) +#if !defined(MBEDTLS_PLATFORM_STD_CALLOC) +static void *platform_calloc_uninit( size_t n, size_t size ) +{ + ((void) n); + ((void) size); + return( NULL ); +} + +#define MBEDTLS_PLATFORM_STD_CALLOC platform_calloc_uninit +#endif /* !MBEDTLS_PLATFORM_STD_CALLOC */ + +#if !defined(MBEDTLS_PLATFORM_STD_FREE) +static void platform_free_uninit( void *ptr ) +{ + ((void) ptr); +} + +#define MBEDTLS_PLATFORM_STD_FREE platform_free_uninit +#endif /* !MBEDTLS_PLATFORM_STD_FREE */ + +void * (*mbedtls_calloc)( size_t, size_t ) = MBEDTLS_PLATFORM_STD_CALLOC; +void (*mbedtls_free)( void * ) = MBEDTLS_PLATFORM_STD_FREE; + +int mbedtls_platform_set_calloc_free( void * (*calloc_func)( size_t, size_t ), + void (*free_func)( void * ) ) +{ + mbedtls_calloc = calloc_func; + mbedtls_free = free_func; + return( 0 ); +} +#endif /* MBEDTLS_PLATFORM_MEMORY */ + +#if defined(_WIN32) +#include <stdarg.h> +int mbedtls_platform_win32_snprintf( char *s, size_t n, const char *fmt, ... ) +{ + int ret; + va_list argp; + + /* Avoid calling the invalid parameter handler by checking ourselves */ + if( s == NULL || n == 0 || fmt == NULL ) + return( -1 ); + + va_start( argp, fmt ); +#if defined(_TRUNCATE) + ret = _vsnprintf_s( s, n, _TRUNCATE, fmt, argp ); +#else + ret = _vsnprintf( s, n, fmt, argp ); + if( ret < 0 || (size_t) ret == n ) + { + s[n-1] = '\0'; + ret = -1; + } +#endif + va_end( argp ); + + return( ret ); +} +#endif + +#if defined(MBEDTLS_PLATFORM_SNPRINTF_ALT) +#if !defined(MBEDTLS_PLATFORM_STD_SNPRINTF) +/* + * Make dummy function to prevent NULL pointer dereferences + */ +static int platform_snprintf_uninit( char * s, size_t n, + const char * format, ... ) +{ + ((void) s); + ((void) n); + ((void) format); + return( 0 ); +} + +#define MBEDTLS_PLATFORM_STD_SNPRINTF platform_snprintf_uninit +#endif /* !MBEDTLS_PLATFORM_STD_SNPRINTF */ + +int (*mbedtls_snprintf)( char * s, size_t n, + const char * format, + ... ) = MBEDTLS_PLATFORM_STD_SNPRINTF; + +int mbedtls_platform_set_snprintf( int (*snprintf_func)( char * s, size_t n, + const char * format, + ... ) ) +{ + mbedtls_snprintf = snprintf_func; + return( 0 ); +} +#endif /* MBEDTLS_PLATFORM_SNPRINTF_ALT */ + +#if defined(MBEDTLS_PLATFORM_PRINTF_ALT) +#if !defined(MBEDTLS_PLATFORM_STD_PRINTF) +/* + * Make dummy function to prevent NULL pointer dereferences + */ +static int platform_printf_uninit( const char *format, ... ) +{ + ((void) format); + return( 0 ); +} + +#define MBEDTLS_PLATFORM_STD_PRINTF platform_printf_uninit +#endif /* !MBEDTLS_PLATFORM_STD_PRINTF */ + +int (*mbedtls_printf)( const char *, ... ) = MBEDTLS_PLATFORM_STD_PRINTF; + +int mbedtls_platform_set_printf( int (*printf_func)( const char *, ... ) ) +{ + mbedtls_printf = printf_func; + return( 0 ); +} +#endif /* MBEDTLS_PLATFORM_PRINTF_ALT */ + +#if defined(MBEDTLS_PLATFORM_FPRINTF_ALT) +#if !defined(MBEDTLS_PLATFORM_STD_FPRINTF) +/* + * Make dummy function to prevent NULL pointer dereferences + */ +static int platform_fprintf_uninit( FILE *stream, const char *format, ... ) +{ + ((void) stream); + ((void) format); + return( 0 ); +} + +#define MBEDTLS_PLATFORM_STD_FPRINTF platform_fprintf_uninit +#endif /* !MBEDTLS_PLATFORM_STD_FPRINTF */ + +int (*mbedtls_fprintf)( FILE *, const char *, ... ) = + MBEDTLS_PLATFORM_STD_FPRINTF; + +int mbedtls_platform_set_fprintf( int (*fprintf_func)( FILE *, const char *, ... ) ) +{ + mbedtls_fprintf = fprintf_func; + return( 0 ); +} +#endif /* MBEDTLS_PLATFORM_FPRINTF_ALT */ + +#if defined(MBEDTLS_PLATFORM_EXIT_ALT) +#if !defined(MBEDTLS_PLATFORM_STD_EXIT) +/* + * Make dummy function to prevent NULL pointer dereferences + */ +static void platform_exit_uninit( int status ) +{ + ((void) status); +} + +#define MBEDTLS_PLATFORM_STD_EXIT platform_exit_uninit +#endif /* !MBEDTLS_PLATFORM_STD_EXIT */ + +void (*mbedtls_exit)( int status ) = MBEDTLS_PLATFORM_STD_EXIT; + +int mbedtls_platform_set_exit( void (*exit_func)( int status ) ) +{ + mbedtls_exit = exit_func; + return( 0 ); +} +#endif /* MBEDTLS_PLATFORM_EXIT_ALT */ + +#if defined(MBEDTLS_HAVE_TIME) + +#if defined(MBEDTLS_PLATFORM_TIME_ALT) +#if !defined(MBEDTLS_PLATFORM_STD_TIME) +/* + * Make dummy function to prevent NULL pointer dereferences + */ +static mbedtls_time_t platform_time_uninit( mbedtls_time_t* timer ) +{ + ((void) timer); + return( 0 ); +} + +#define MBEDTLS_PLATFORM_STD_TIME platform_time_uninit +#endif /* !MBEDTLS_PLATFORM_STD_TIME */ + +mbedtls_time_t (*mbedtls_time)( mbedtls_time_t* timer ) = MBEDTLS_PLATFORM_STD_TIME; + +int mbedtls_platform_set_time( mbedtls_time_t (*time_func)( mbedtls_time_t* timer ) ) +{ + mbedtls_time = time_func; + return( 0 ); +} +#endif /* MBEDTLS_PLATFORM_TIME_ALT */ + +#endif /* MBEDTLS_HAVE_TIME */ + +#if defined(MBEDTLS_ENTROPY_NV_SEED) +#if !defined(MBEDTLS_PLATFORM_NO_STD_FUNCTIONS) && defined(MBEDTLS_FS_IO) +/* Default implementations for the platform independent seed functions use + * standard libc file functions to read from and write to a pre-defined filename + */ +int mbedtls_platform_std_nv_seed_read( unsigned char *buf, size_t buf_len ) +{ + FILE *file; + size_t n; + + if( ( file = fopen( MBEDTLS_PLATFORM_STD_NV_SEED_FILE, "rb" ) ) == NULL ) + return( -1 ); + + if( ( n = fread( buf, 1, buf_len, file ) ) != buf_len ) + { + fclose( file ); + mbedtls_zeroize( buf, buf_len ); + return( -1 ); + } + + fclose( file ); + return( (int)n ); +} + +int mbedtls_platform_std_nv_seed_write( unsigned char *buf, size_t buf_len ) +{ + FILE *file; + size_t n; + + if( ( file = fopen( MBEDTLS_PLATFORM_STD_NV_SEED_FILE, "w" ) ) == NULL ) + return -1; + + if( ( n = fwrite( buf, 1, buf_len, file ) ) != buf_len ) + { + fclose( file ); + return -1; + } + + fclose( file ); + return( (int)n ); +} +#endif /* MBEDTLS_PLATFORM_NO_STD_FUNCTIONS */ + +#if defined(MBEDTLS_PLATFORM_NV_SEED_ALT) +#if !defined(MBEDTLS_PLATFORM_STD_NV_SEED_READ) +/* + * Make dummy function to prevent NULL pointer dereferences + */ +static int platform_nv_seed_read_uninit( unsigned char *buf, size_t buf_len ) +{ + ((void) buf); + ((void) buf_len); + return( -1 ); +} + +#define MBEDTLS_PLATFORM_STD_NV_SEED_READ platform_nv_seed_read_uninit +#endif /* !MBEDTLS_PLATFORM_STD_NV_SEED_READ */ + +#if !defined(MBEDTLS_PLATFORM_STD_NV_SEED_WRITE) +/* + * Make dummy function to prevent NULL pointer dereferences + */ +static int platform_nv_seed_write_uninit( unsigned char *buf, size_t buf_len ) +{ + ((void) buf); + ((void) buf_len); + return( -1 ); +} + +#define MBEDTLS_PLATFORM_STD_NV_SEED_WRITE platform_nv_seed_write_uninit +#endif /* !MBEDTLS_PLATFORM_STD_NV_SEED_WRITE */ + +int (*mbedtls_nv_seed_read)( unsigned char *buf, size_t buf_len ) = + MBEDTLS_PLATFORM_STD_NV_SEED_READ; +int (*mbedtls_nv_seed_write)( unsigned char *buf, size_t buf_len ) = + MBEDTLS_PLATFORM_STD_NV_SEED_WRITE; + +int mbedtls_platform_set_nv_seed( + int (*nv_seed_read_func)( unsigned char *buf, size_t buf_len ), + int (*nv_seed_write_func)( unsigned char *buf, size_t buf_len ) ) +{ + mbedtls_nv_seed_read = nv_seed_read_func; + mbedtls_nv_seed_write = nv_seed_write_func; + return( 0 ); +} +#endif /* MBEDTLS_PLATFORM_NV_SEED_ALT */ +#endif /* MBEDTLS_ENTROPY_NV_SEED */ + +#if !defined(MBEDTLS_PLATFORM_SETUP_TEARDOWN_ALT) +/* + * Placeholder platform setup that does nothing by default + */ +int mbedtls_platform_setup( mbedtls_platform_context *ctx ) +{ + (void)ctx; + + return( 0 ); +} + +/* + * Placeholder platform teardown that does nothing by default + */ +void mbedtls_platform_teardown( mbedtls_platform_context *ctx ) +{ + (void)ctx; +} +#endif /* MBEDTLS_PLATFORM_SETUP_TEARDOWN_ALT */ + +#endif /* MBEDTLS_PLATFORM_C */ |