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secured key generation

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I made generating 'random' numbers much much secured -> /dev/urandom
This commit is contained in:
Václav Šmejkal 2022-05-21 16:26:24 +02:00
parent f2da93818b
commit f4148b0de7
1 changed files with 8 additions and 4 deletions
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12
src/lib/encrypter.c
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@ -3,7 +3,6 @@
#include <stdio.h> #include <stdio.h>
#include <stdlib.h> #include <stdlib.h>
#include <string.h> #include <string.h>
#include <time.h>
#include <math.h> #include <math.h>
#include <why2/flags.h> #include <why2/flags.h>
@ -14,14 +13,18 @@ outputFlags encryptText(char *text, char *keyNew, inputFlags flags)
//CHECK FOR ACTIVE VERSION //CHECK FOR ACTIVE VERSION
if (!flags.skipCheck) checkVersion(flags); if (!flags.skipCheck) checkVersion(flags);
srand(time(0)); //TRY TO MAKE RANDOM GENERATION REALLY "RANDOM"
//VARIABLES //VARIABLES
char *key = malloc(sizeof(int) * getKeyLength()); char *key = malloc(sizeof(int) * getKeyLength());
char *returningText; char *returningText;
char *textBuffer; char *textBuffer;
int *textKeyChain = malloc(sizeof(int) * strlen(text)); int *textKeyChain = malloc(sizeof(int) * strlen(text));
int numberBuffer = 0; int numberBuffer;
FILE *fileBuffer;
//TRY TO MAKE RANDOM GENERATION REALLY "RANDOM"
fileBuffer = fopen("/dev/urandom", "r");
fread(&numberBuffer, 4, 1, fileBuffer);
srand(numberBuffer);
if (keyNew != NULL) if (keyNew != NULL)
{ {
@ -103,6 +106,7 @@ outputFlags encryptText(char *text, char *keyNew, inputFlags flags)
}; };
//DEALLOCATION //DEALLOCATION
fclose(fileBuffer);
free(textKeyChain); free(textKeyChain);
return output; return output;