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/*
* gd_security.c
*
* Implements buffer overflow check routines.
*
* Written 2004, Phil Knirsch.
* Based on netpbm fixes by Alan Cox.
*
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <stdio.h>
#include <stdlib.h>
#include <limits.h>
#include "gd.h"
int overflow2(int a, int b)
{
if(a <= 0 || b <= 0) {
php_gd_error("gd warning: one parameter to a memory allocation multiplication is negative or zero, failing operation gracefully\n");
return 1;
}
if(a > INT_MAX / b) {
php_gd_error("gd warning: product of memory allocation multiplication would exceed INT_MAX, failing operation gracefully\n");
return 1;
}
return 0;
}
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