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* Easy POC code. We need some LD_PRELOAD shit instead.

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This commit is contained in:
Sam Hocevar
2006-12-14 14:23:07 +00:00
committed by sam
parent 6021b30c33
commit 48650e6bbe
5 changed files with 257 additions and 3 deletions
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configure.ac
+1 -1
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@@ -25,7 +25,7 @@ if test "$build" != "$host" -a "${PKG_CONFIG_LIBDIR}" = ""; then
export PKG_CONFIG_LIBDIR=/dev/null
fi
AC_CHECK_HEADERS(getopt.h)
AC_CHECK_HEADERS(inttypes.h stdint.h getopt.h)
AC_CHECK_FUNCS(getopt_long,
[AC_DEFINE(HAVE_GETOPT_LONG, 1, Define to 1 if you have the `getopt_long' function.)],
src/Makefile.am
+1 -1
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@@ -1,4 +1,4 @@
bin_PROGRAMS = zzuf
zzuf_SOURCES = zzuf.c
zzuf_SOURCES = zzuf.c random.c
src/random.c
+46
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@@ -0,0 +1,46 @@
/*
* zzuf - general purpose fuzzer
* Copyright (c) 2006 Sam Hocevar <sam@zoy.org>
* All Rights Reserved
*
* $Id$
*
* This program is free software. It comes without any warranty, to
* the extent permitted by applicable law. You can redistribute it
* and/or modify it under the terms of the Do What The Fuck You Want
* To Public License, Version 2, as published by Sam Hocevar. See
* http://sam.zoy.org/wtfpl/COPYING for more details.
*/
/*
* random.c: pseudorandom number generator
*/
#include "config.h"
#if defined HAVE_STDINT_H
# include <stdint.h>
#elif defined HAVE_INTTYPES_H
# include <inttypes.h>
#endif
#include <stdlib.h>
#include "random.h"
void zzuf_srand(uint64_t seed)
{
uint32_t a = seed & 0xffffffff;
uint32_t b = seed >> 32;
srand((a ^ 0x12345678) * (b ^ 0x87654321));
}
uint64_t zzuf_rand(uint64_t max)
{
if(max <= RAND_MAX)
return rand() % max;
/* Could be better, but do we care? */
return (uint64_t)((max * 1.0) * (rand() / (RAND_MAX + 1.0)));
}
src/random.h
+21
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@@ -0,0 +1,21 @@
/*
* zzuf - general purpose fuzzer
* Copyright (c) 2006 Sam Hocevar <sam@zoy.org>
* All Rights Reserved
*
* $Id$
*
* This program is free software. It comes without any warranty, to
* the extent permitted by applicable law. You can redistribute it
* and/or modify it under the terms of the Do What The Fuck You Want
* To Public License, Version 2, as published by Sam Hocevar. See
* http://sam.zoy.org/wtfpl/COPYING for more details.
*/
/*
* random.h: pseudorandom number generator
*/
void zzuf_srand(uint64_t);
uint64_t zzuf_rand(uint64_t);
src/zzuf.c
+188 -1
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@@ -1 +1,188 @@
int main(void) { return 0; }
/*
* zzuf - general purpose fuzzer
* Copyright (c) 2006 Sam Hocevar <sam@zoy.org>
* All Rights Reserved
*
* $Id$
*
* This program is free software. It comes without any warranty, to
* the extent permitted by applicable law. You can redistribute it
* and/or modify it under the terms of the Do What The Fuck You Want
* To Public License, Version 2, as published by Sam Hocevar. See
* http://sam.zoy.org/wtfpl/COPYING for more details.
*/
/*
* main.c: main program
*/
#include "config.h"
#if defined HAVE_STDINT_H
# include <stdint.h>
#elif defined HAVE_INTTYPES_H
# include <inttypes.h>
#endif
#if defined(HAVE_GETOPT_H)
# include <getopt.h>
#endif
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include "random.h"
static void version(void);
#if defined(HAVE_GETOPT_H)
static void usage(void);
#endif
int main(int argc, char *argv[])
{
char *input = NULL, *output = NULL;
FILE *in, *out;
char *data;
long int i, todo, size, seed = -1;
float percent = -1.0;
#if defined(HAVE_GETOPT_H)
for(;;)
{
# ifdef HAVE_GETOPT_LONG
# define MOREINFO "Try `%s --help' for more information.\n"
int option_index = 0;
static struct option long_options[] =
{
/* Long option, needs arg, flag, short option */
{ "input", 1, NULL, 'i' },
{ "output", 1, NULL, 'o' },
{ "seed", 1, NULL, 's' },
{ "percent", 1, NULL, 'p' },
{ "help", 0, NULL, 'h' },
{ "version", 0, NULL, 'v' },
};
int c = getopt_long(argc, argv, "i:o:s:p:hv",
long_options, &option_index);
# else
# define MOREINFO "Try `%s -h' for more information.\n"
int c = getopt(argc, argv, "i:o:s:p:hv");
# endif
if(c == -1)
break;
switch(c)
{
case 'i': /* --input */
input = optarg;
break;
case 'o': /* --output */
output = optarg;
break;
case 's': /* --seed */
seed = atol(optarg);
break;
case 'p': /* --percent */
percent = atof(optarg);
break;
case 'h': /* --help */
usage();
return 0;
case 'v': /* --version */
version();
return 0;
default:
printf("%s: invalid option -- %c\n", argv[0], c);
printf(MOREINFO, argv[0]);
return 1;
}
}
#else
# define MOREINFO "Usage: %s message...\n"
int optind = 1;
#endif
/* Open the files */
if(input)
{
in = fopen(input, "rb");
if(!in)
{
fprintf(stderr, "could not open `%s'\n", input);
return 1;
}
}
else
in = stdin;
if(output)
{
out = fopen(output, "wb");
if(!out)
{
fprintf(stderr, "could not open `%s' for writing\n", output);
return 1;
}
}
else
out = stdout;
/* Checking parameters */
if(seed == -1)
{
unsigned long int a = getpid();
seed = (0x7931fea7 * a) ^ (0xb7390af7 + a);
fprintf(stderr, "no seed specified, using %lu\n", seed);
}
if(percent == -1.0)
{
percent = 0.1;
fprintf(stderr, "no percent specified, using %g\n", percent);
}
/* Read file contents */
fseek(in, 0, SEEK_END);
size = ftell(in);
data = malloc(size);
fseek(in, 0, SEEK_SET);
fread(data, size, 1, in);
fclose(in);
/* Randomise shit */
zzuf_srand(seed);
todo = percent * 0.01 * size;
while(todo--)
{
i = zzuf_rand(size);
data[i] ^= 1 << zzuf_rand(8);
}
/* Write result */
fwrite(data, size, 1, out);
fclose(out);
return 0;
}
static void version(void)
{
printf("zzuf %s by Sam Hocevar <sam@zoy.org>\n", VERSION);
}
#if defined(HAVE_GETOPT_H)
static void usage(void)
{
printf("Usage: zuff [ -vh ] [ -i input ] [ -o output ]\n");
printf(" [ -p percent ] [ -s seed ]\n");
# ifdef HAVE_GETOPT_LONG
printf(" -h, --help display this help and exit\n");
printf(" -v, --version output version information and exit\n");
# else
printf(" -h display this help and exit\n");
printf(" -v output version information and exit\n");
# endif
}
#endif