diff options
Diffstat (limited to 'thirdparty/mbedtls/library/entropy.c')
| -rw-r--r-- | thirdparty/mbedtls/library/entropy.c | 56 |
1 files changed, 47 insertions, 9 deletions
diff --git a/thirdparty/mbedtls/library/entropy.c b/thirdparty/mbedtls/library/entropy.c index f8db1a5503..9f1a32bdc1 100644 --- a/thirdparty/mbedtls/library/entropy.c +++ b/thirdparty/mbedtls/library/entropy.c @@ -1,8 +1,14 @@ /* * Entropy accumulator implementation * - * Copyright (C) 2006-2016, ARM Limited, All Rights Reserved - * SPDX-License-Identifier: Apache-2.0 + * Copyright The Mbed TLS Contributors + * SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later + * + * This file is provided under the Apache License 2.0, or the + * GNU General Public License v2.0 or later. + * + * ********** + * Apache License 2.0: * * Licensed under the Apache License, Version 2.0 (the "License"); you may * not use this file except in compliance with the License. @@ -16,7 +22,26 @@ * 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) + * ********** + * + * ********** + * GNU General Public License v2.0 or later: + * + * 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. + * + * ********** */ #if !defined(MBEDTLS_CONFIG_FILE) @@ -121,6 +146,11 @@ void mbedtls_entropy_init( mbedtls_entropy_context *ctx ) void mbedtls_entropy_free( mbedtls_entropy_context *ctx ) { + /* If the context was already free, don't call free() again. + * This is important for mutexes which don't allow double-free. */ + if( ctx->accumulator_started == -1 ) + return; + #if defined(MBEDTLS_HAVEGE_C) mbedtls_havege_free( &ctx->havege_data ); #endif @@ -137,7 +167,7 @@ void mbedtls_entropy_free( mbedtls_entropy_context *ctx ) #endif ctx->source_count = 0; mbedtls_platform_zeroize( ctx->source, sizeof( ctx->source ) ); - ctx->accumulator_started = 0; + ctx->accumulator_started = -1; } int mbedtls_entropy_add_source( mbedtls_entropy_context *ctx, @@ -464,14 +494,20 @@ int mbedtls_entropy_update_nv_seed( mbedtls_entropy_context *ctx ) int mbedtls_entropy_write_seed_file( mbedtls_entropy_context *ctx, const char *path ) { int ret = MBEDTLS_ERR_ENTROPY_FILE_IO_ERROR; - FILE *f; + FILE *f = NULL; unsigned char buf[MBEDTLS_ENTROPY_BLOCK_SIZE]; - if( ( f = fopen( path, "wb" ) ) == NULL ) - return( MBEDTLS_ERR_ENTROPY_FILE_IO_ERROR ); - if( ( ret = mbedtls_entropy_func( ctx, buf, MBEDTLS_ENTROPY_BLOCK_SIZE ) ) != 0 ) + { + ret = MBEDTLS_ERR_ENTROPY_SOURCE_FAILED; goto exit; + } + + if( ( f = fopen( path, "wb" ) ) == NULL ) + { + ret = MBEDTLS_ERR_ENTROPY_FILE_IO_ERROR; + goto exit; + } if( fwrite( buf, 1, MBEDTLS_ENTROPY_BLOCK_SIZE, f ) != MBEDTLS_ENTROPY_BLOCK_SIZE ) { @@ -484,7 +520,9 @@ int mbedtls_entropy_write_seed_file( mbedtls_entropy_context *ctx, const char *p exit: mbedtls_platform_zeroize( buf, sizeof( buf ) ); - fclose( f ); + if( f != NULL ) + fclose( f ); + return( ret ); } |