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implemented getrandom instead of rand

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also made why2_generate_key's variables snake_case
This commit is contained in:
Václav Šmejkal 2024-02-22 22:04:48 +01:00
parent 20e805a8ad
commit 8fe73fafe9
Signed by: ENGO150
GPG Key ID: 4A57E86482968843
1 changed files with 12 additions and 38 deletions
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50
src/core/lib/utils/misc.c
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@ -24,7 +24,7 @@ along with this program. If not, see <https://www.gnu.org/licenses/>.
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/time.h>
#include <sys/random.h>
#include <ftw.h>
#include <curl/curl.h>
@ -34,8 +34,6 @@ along with this program. If not, see <https://www.gnu.org/licenses/>.
#include <why2/flags.h>
#include <why2/memory.h>
why2_bool seedSet = 0; //DO NOT FUCKING TOUCH THIS!!!
int multiply_cb(int a, int b) { return a * b; }
int subtract_cb(int a, int b) { return a - b; }
int sum_cb(int a, int b) { return a + b; }
@ -393,54 +391,30 @@ unsigned long why2_compare_time_micro(struct timeval startTime, struct timeval f
char *why2_generate_key(int key_length)
{
int numberBuffer;
int number_buffer;
unsigned int random_buffer;
char *key;
if (!seedSet)
{
why2_set_memory_identifier("core_key_generation_random");
//TRY TO MAKE RANDOM GENERATION REALLY "RANDOM"
FILE *fileBuffer;
fileBuffer = why2_fopen("/dev/urandom", "r");
if (fread(&numberBuffer, sizeof(numberBuffer), 1, fileBuffer) != 1)
{
if (!why2_get_flags().no_output) fprintf(stderr, "Reading file failed!\n");
why2_clean_memory("core_key_generation_random");
return NULL;
}
numberBuffer = abs(numberBuffer); //MAKE numberBuffer POSITIVE
srand(numberBuffer);
why2_deallocate(fileBuffer);
seedSet = 1;
why2_reset_memory_identifier();
}
key = why2_malloc(key_length + 1);
for (int i = 0; i < key_length; i++)
{
//GET RANDOM NUMBER
if (getrandom(&random_buffer, sizeof(unsigned int), GRND_NONBLOCK) == -1) why2_die("getrandom fn failed!");
//SET numberBuffer TO RANDOM NUMBER BETWEEN 0 AND 52
numberBuffer = (rand() % 52) + 1;
number_buffer = (random_buffer % 52) + 1;
//GET CHAR FROM numberBuffer
if (numberBuffer > 26)
if (number_buffer > 26)
{
numberBuffer += 70;
}
else
number_buffer += 70;
} else
{
numberBuffer += 64;
number_buffer += 64;
}
key[i] = (char) numberBuffer;
key[i] = (char) number_buffer;
}
key[key_length] = '\0';