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wolf_main.c
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wolf_main.c
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/* wolf_main.c
*
* Copyright (C) 2006-2024 wolfSSL Inc.
*
* This file is part of wolfSSL.
*
* wolfSSL 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.
*
* wolfSSL 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 02110-1335, USA
*/
#include <wolfssl/wolfcrypt/settings.h>
#include <wolfssl/wolfcrypt/random.h> /* for CUSTOM_RAND_TYPE */
#include <stdint.h>
#include <stdio.h>
#include <stdarg.h>
#include <string.h>
/* TIME CODE */
/* TODO: Implement real RTC */
/* Optionally you can define NO_ASN_TIME to disable all cert time checks */
static int gTimeMs;
static int hw_get_time_sec(void)
{
#warning Must implement your own time source if validating certificates
return ++gTimeMs;
}
/* This is used by wolfCrypt asn.c for cert time checking */
unsigned long my_time(unsigned long* timer)
{
(void)timer;
return hw_get_time_sec();
}
#ifndef WOLFCRYPT_ONLY
/* This is used by TLS only */
unsigned int LowResTimer(void)
{
return hw_get_time_sec();
}
#endif
#ifndef NO_CRYPT_BENCHMARK
/* This is used by wolfCrypt benchmark tool only */
double current_time(int reset)
{
double timeNow;
int timeMs = gTimeMs;
(void)reset;
timeNow = (timeMs / 1000); // sec
timeNow += (double)(timeMs % 1000) / 1000; // ms
return timeNow;
}
#endif
/* RNG CODE */
/* TODO: Implement real RNG */
static unsigned int gCounter;
unsigned int hw_rand(void)
{
#warning Must implement your own random source
return ++gCounter;
}
unsigned int my_rng_seed_gen(void)
{
return hw_rand();
}
int my_rng_gen_block(unsigned char* output, unsigned int sz)
{
uint32_t i = 0;
while (i < sz)
{
/* If not aligned or there is odd/remainder */
if( (i + sizeof(CUSTOM_RAND_TYPE)) > sz ||
((uint32_t)&output[i] % sizeof(CUSTOM_RAND_TYPE)) != 0
) {
/* Single byte at a time */
output[i++] = (unsigned char)my_rng_seed_gen();
}
else {
/* Use native 8, 16, 32 or 64 copy instruction */
*((CUSTOM_RAND_TYPE*)&output[i]) = my_rng_seed_gen();
i += sizeof(CUSTOM_RAND_TYPE);
}
}
return 0;
}
#ifdef XMALLOC_OVERRIDE
void *myMalloc(size_t n, void* heap, int type)
{
(void)n;
(void)heap;
(void)type;
#warning Must implement your own malloc
return NULL;
}
void myFree(void *p, void* heap, int type)
{
(void)p;
(void)heap;
(void)type;
#warning Must implement your own free
}
/* Required for normal math (!USE_FAST_MATH) */
void *myRealloc(void *p, size_t n, void* heap, int type)
{
(void)p;
(void)n;
(void)heap;
(void)type;
#warning Must implement your own realloc
return NULL;
}
#endif /* XMALLOC_OVERRIDE */