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mbedTLS: add version 2.1.1
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.
This commit is contained in:
Tillmann Karras
216
Externals/mbedtls/library/entropy_poll.c
vendored
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216
Externals/mbedtls/library/entropy_poll.c
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/*
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* Platform-specific and custom entropy polling functions
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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_ENTROPY_C)
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#include "mbedtls/entropy.h"
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#include "mbedtls/entropy_poll.h"
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#if defined(MBEDTLS_TIMING_C)
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#include <string.h>
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#include "mbedtls/timing.h"
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#endif
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#if defined(MBEDTLS_HAVEGE_C)
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#include "mbedtls/havege.h"
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#endif
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#if !defined(MBEDTLS_NO_PLATFORM_ENTROPY)
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#if defined(_WIN32) && !defined(EFIX64) && !defined(EFI32)
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#if !defined(_WIN32_WINNT)
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#define _WIN32_WINNT 0x0400
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#endif
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#include <windows.h>
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#include <wincrypt.h>
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int mbedtls_platform_entropy_poll( void *data, unsigned char *output, size_t len,
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size_t *olen )
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{
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HCRYPTPROV provider;
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((void) data);
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*olen = 0;
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if( CryptAcquireContext( &provider, NULL, NULL,
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PROV_RSA_FULL, CRYPT_VERIFYCONTEXT ) == FALSE )
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{
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return( MBEDTLS_ERR_ENTROPY_SOURCE_FAILED );
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}
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if( CryptGenRandom( provider, (DWORD) len, output ) == FALSE )
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return( MBEDTLS_ERR_ENTROPY_SOURCE_FAILED );
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CryptReleaseContext( provider, 0 );
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*olen = len;
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return( 0 );
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}
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#else /* _WIN32 && !EFIX64 && !EFI32 */
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/*
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* Test for Linux getrandom() support.
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* Since there is no wrapper in the libc yet, use the generic syscall wrapper
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* available in GNU libc and compatible libc's (eg uClibc).
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*/
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#if defined(__linux__) && defined(__GLIBC__)
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#include <unistd.h>
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#include <sys/syscall.h>
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#if defined(SYS_getrandom)
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#define HAVE_GETRANDOM
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static int getrandom_wrapper( void *buf, size_t buflen, unsigned int flags )
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{
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/* MemSan cannot understand that the syscall writes to the buffer */
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#if defined(__has_feature)
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#if __has_feature(memory_sanitizer)
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memset( buf, 0, buflen );
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#endif
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#endif
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return( syscall( SYS_getrandom, buf, buflen, flags ) );
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}
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#include <sys/utsname.h>
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/* Check if version is at least 3.17.0 */
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static int check_version_3_17_plus( void )
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{
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int minor;
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struct utsname un;
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const char *ver;
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/* Get version information */
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uname(&un);
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ver = un.release;
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/* Check major version; assume a single digit */
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if( ver[0] < '3' || ver[0] > '9' || ver [1] != '.' )
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return( -1 );
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if( ver[0] - '0' > 3 )
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return( 0 );
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/* Ok, so now we know major == 3, check minor.
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* Assume 1 or 2 digits. */
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if( ver[2] < '0' || ver[2] > '9' )
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return( -1 );
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minor = ver[2] - '0';
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if( ver[3] >= '0' && ver[3] <= '9' )
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minor = 10 * minor + ver[3] - '0';
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else if( ver [3] != '.' )
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return( -1 );
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if( minor < 17 )
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return( -1 );
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return( 0 );
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}
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static int has_getrandom = -1;
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#endif /* SYS_getrandom */
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#endif /* __linux__ */
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#include <stdio.h>
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int mbedtls_platform_entropy_poll( void *data,
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unsigned char *output, size_t len, size_t *olen )
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{
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FILE *file;
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size_t read_len;
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((void) data);
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#if defined(HAVE_GETRANDOM)
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if( has_getrandom == -1 )
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has_getrandom = ( check_version_3_17_plus() == 0 );
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if( has_getrandom )
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{
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int ret;
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if( ( ret = getrandom_wrapper( output, len, 0 ) ) < 0 )
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return( MBEDTLS_ERR_ENTROPY_SOURCE_FAILED );
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*olen = ret;
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return( 0 );
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}
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#endif /* HAVE_GETRANDOM */
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*olen = 0;
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file = fopen( "/dev/urandom", "rb" );
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if( file == NULL )
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return( MBEDTLS_ERR_ENTROPY_SOURCE_FAILED );
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read_len = fread( output, 1, len, file );
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if( read_len != len )
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{
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fclose( file );
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return( MBEDTLS_ERR_ENTROPY_SOURCE_FAILED );
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}
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fclose( file );
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*olen = len;
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return( 0 );
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}
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#endif /* _WIN32 && !EFIX64 && !EFI32 */
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#endif /* !MBEDTLS_NO_PLATFORM_ENTROPY */
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#if defined(MBEDTLS_TIMING_C)
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int mbedtls_hardclock_poll( void *data,
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unsigned char *output, size_t len, size_t *olen )
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{
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unsigned long timer = mbedtls_timing_hardclock();
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((void) data);
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*olen = 0;
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if( len < sizeof(unsigned long) )
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return( 0 );
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memcpy( output, &timer, sizeof(unsigned long) );
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*olen = sizeof(unsigned long);
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return( 0 );
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}
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#endif /* MBEDTLS_TIMING_C */
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#if defined(MBEDTLS_HAVEGE_C)
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int mbedtls_havege_poll( void *data,
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unsigned char *output, size_t len, size_t *olen )
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{
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mbedtls_havege_state *hs = (mbedtls_havege_state *) data;
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*olen = 0;
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if( mbedtls_havege_random( hs, output, len ) != 0 )
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return( MBEDTLS_ERR_ENTROPY_SOURCE_FAILED );
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*olen = len;
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return( 0 );
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}
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#endif /* MBEDTLS_HAVEGE_C */
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#endif /* MBEDTLS_ENTROPY_C */
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