Copy Link
Add to Bookmark
Report
BFi numero 09 anno 3 file 21 di 21
==============================================================================
-------------[ BFi numero 9, anno 3 - 03/11/2000 - file 21 di 21 ]------------
==============================================================================
-[ MiSCELLANE0US ]------------------------------------------------------------
---[ SNiP V.2
--[ Language: C
- multi directory support
- directory analysis
- crc generator
- statistics information
<-| snip2/snip2.c |->
/*
* Name: SNiP II
* Date: Tue Aug 15 14:04:52 2000
* Author: pIGpEN [ pigpen@s0ftpj.org, deadhead@sikurezza.org ]
*
* SoftProject 2000 - Digital Sekurity for Y2k
* Sikurezza.org - Italian Security MailingList
*
* COFFEE-WARE LICENSE - This source code is like "THE BEER-WARE LICENSE" by
* Poul-Henning Kamp <phk@FreeBSD.ORG> but you can give me in return a coffee.
*
* Tested on: FreeBSD 4.0-RELEASE FreeBSD 4.0-RELEASE #45: Sat Au i386
*
* Snip for definition is coded during alcohol abuse ... This source can't have
* a good style, logical parts or sense... I apologize... snip! ;)
*
*/
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <stdlib.h>
#include <dirent.h>
#define BFIART "BFi"
#define DIRNAME "bfisrc"
#define BFISEP "<-| "
#define BFIEND "<-X->"
#define BFISEP_LEN strlen(BFISEP)
#define BFIEND_LEN strlen(BFIEND)
#define BUF_SIZE 1024
#ifndef S_ISDIR
# ifdef S_IFDIR
# define S_ISDIR(i) (((i) & S_IFMT) == S_IFDIR)
# else
# define S_ISDIR(i) (((i) & 0170000) == 0040000)
# endif
#endif
#ifndef S_ISREG
# ifdef S_IFREG
# define S_ISREG(i) (((i) & S_IFMT) == S_IFREG)
# else
# define S_ISREG(i) (((i) & 0170000) == 0100000)
# endif
#endif
int usage (char *cmd);
void dir2file (char *dirname);
void snip (char *filename);
int checktype (char *name);
void createsrc (FILE *in, FILE *out);
int makedir (const char *dirname);
unsigned long checkcrc (FILE *fp);
extern char *optarg;
struct {
int st_snipped;
int st_directory;
} snipstat;
int
main(int narg, char **arg)
{
return ( (narg!=2) ? usage(arg[0]) : checktype(arg[1]) );
}
int
usage(char *cmd)
{
printf( "\nSNiPv2\n"
"Usage: %s dir-or-file\n\n", cmd);
return 0;
}
int
checktype(char *name)
{
struct stat chk;
bzero(&snipstat, sizeof snipstat);
if (stat(name, &chk)) {
printf("Hmm %s doesn't exist\n", name);
exit(0);
}
if (S_ISDIR(chk.st_mode)) dir2file(name);
if (S_ISREG(chk.st_mode)) snip(name);
printf("\n%d snipped file\n", snipstat.st_snipped);
printf("%d directory created\n", snipstat.st_directory);
return 1;
}
void
dir2file(char *dirname)
{
DIR *dp;
struct dirent *de;
if (!(dp=opendir(dirname))) {
perror("[dir2file] opendir");
exit(0);
}
if (chdir(dirname) == -1) {
perror("[dir2file] chdir1");
exit(0);
}
while ((de=readdir(dp))) {
printf("[%s]: ", de->d_name);
switch(de->d_type) {
case DT_FIFO:
case DT_BLK:
case DT_LNK:
case DT_DIR:
case DT_SOCK: printf("skipping\n");
continue;
}
putchar('\n');
if (strstr(de->d_name, BFIART)) {
snip(de->d_name);
} else
printf("\tnot found\n");
}
closedir(dp);
}
void
snip(char *filename)
{
FILE *in, *out;
char buf[BUF_SIZE];
static int passed = 0;
if (!passed) {
makedir(DIRNAME);
passed = 1;
}
if (!(in=fopen(filename,"r"))) {
perror("[snip] fopen()");
exit(0);
}
chdir(DIRNAME);
while (fgets(buf, BUF_SIZE, in)) {
if (!strncmp(buf, BFISEP, BFISEP_LEN)) {
char *ptr;
buf[strlen(buf) - 1] = 0;
/*
* create directories like in extract
*/
if ((ptr = strchr(buf + BFISEP_LEN, '/'))) {
while(ptr) {
*ptr = 0;
if(makedir(buf + BFISEP_LEN) != -1)
snipstat.st_directory++;
*ptr = '/';
ptr = strchr(ptr + 1, '/');
}
}
ptr = strchr(buf + BFISEP_LEN, ' ');
/*
* create file
*/
*ptr = 0;
if (!(out = fopen(buf + BFISEP_LEN, "wb+"))) {
perror("[snip] fopen(outfile)\n");
exit(0);
}
printf("\tfilename [%s] ", buf + BFISEP_LEN);
createsrc(in, out);
*ptr = ' ';
/*
* check crc
*/
if ((ptr = strstr(ptr, "crc32: "))) {
char *ptr_crc;
u_long crc, gencrc;
ptr += strlen("crc32: ");
if ((ptr_crc = strchr(ptr, ' '))) {
*ptr_crc = 0;
crc = strtoul(ptr, NULL, 10);
gencrc = checkcrc(out);
if(crc == gencrc)
printf(" CRC32 ok");
else
printf(" CRC32 error: %lu",
gencrc);
*ptr_crc = ' ';
} else {
printf("no end of crc in snip hdr\n");
exit(0);
}
}
putchar('\n');
fclose(out);
}
}
chdir("..");
fclose(in);
}
void
createsrc(FILE *in, FILE *out)
{
char buf[BUF_SIZE];
snipstat.st_snipped++;
while (fgets(buf, BUF_SIZE, in) && strncmp(buf, BFIEND, BFIEND_LEN))
fprintf(out, "%s", buf);
}
int
makedir(const char *dirname)
{
return (mkdir(dirname, 0755));
}
static const u_int32_t crctab[256] = {
0x00000000, 0x77073096, 0xee0e612c, 0x990951ba,
0x076dc419, 0x706af48f, 0xe963a535, 0x9e6495a3,
0x0edb8832, 0x79dcb8a4, 0xe0d5e91e, 0x97d2d988,
0x09b64c2b, 0x7eb17cbd, 0xe7b82d07, 0x90bf1d91,
0x1db71064, 0x6ab020f2, 0xf3b97148, 0x84be41de,
0x1adad47d, 0x6ddde4eb, 0xf4d4b551, 0x83d385c7,
0x136c9856, 0x646ba8c0, 0xfd62f97a, 0x8a65c9ec,
0x14015c4f, 0x63066cd9, 0xfa0f3d63, 0x8d080df5,
0x3b6e20c8, 0x4c69105e, 0xd56041e4, 0xa2677172,
0x3c03e4d1, 0x4b04d447, 0xd20d85fd, 0xa50ab56b,
0x35b5a8fa, 0x42b2986c, 0xdbbbc9d6, 0xacbcf940,
0x32d86ce3, 0x45df5c75, 0xdcd60dcf, 0xabd13d59,
0x26d930ac, 0x51de003a, 0xc8d75180, 0xbfd06116,
0x21b4f4b5, 0x56b3c423, 0xcfba9599, 0xb8bda50f,
0x2802b89e, 0x5f058808, 0xc60cd9b2, 0xb10be924,
0x2f6f7c87, 0x58684c11, 0xc1611dab, 0xb6662d3d,
0x76dc4190, 0x01db7106, 0x98d220bc, 0xefd5102a,
0x71b18589, 0x06b6b51f, 0x9fbfe4a5, 0xe8b8d433,
0x7807c9a2, 0x0f00f934, 0x9609a88e, 0xe10e9818,
0x7f6a0dbb, 0x086d3d2d, 0x91646c97, 0xe6635c01,
0x6b6b51f4, 0x1c6c6162, 0x856530d8, 0xf262004e,
0x6c0695ed, 0x1b01a57b, 0x8208f4c1, 0xf50fc457,
0x65b0d9c6, 0x12b7e950, 0x8bbeb8ea, 0xfcb9887c,
0x62dd1ddf, 0x15da2d49, 0x8cd37cf3, 0xfbd44c65,
0x4db26158, 0x3ab551ce, 0xa3bc0074, 0xd4bb30e2,
0x4adfa541, 0x3dd895d7, 0xa4d1c46d, 0xd3d6f4fb,
0x4369e96a, 0x346ed9fc, 0xad678846, 0xda60b8d0,
0x44042d73, 0x33031de5, 0xaa0a4c5f, 0xdd0d7cc9,
0x5005713c, 0x270241aa, 0xbe0b1010, 0xc90c2086,
0x5768b525, 0x206f85b3, 0xb966d409, 0xce61e49f,
0x5edef90e, 0x29d9c998, 0xb0d09822, 0xc7d7a8b4,
0x59b33d17, 0x2eb40d81, 0xb7bd5c3b, 0xc0ba6cad,
0xedb88320, 0x9abfb3b6, 0x03b6e20c, 0x74b1d29a,
0xead54739, 0x9dd277af, 0x04db2615, 0x73dc1683,
0xe3630b12, 0x94643b84, 0x0d6d6a3e, 0x7a6a5aa8,
0xe40ecf0b, 0x9309ff9d, 0x0a00ae27, 0x7d079eb1,
0xf00f9344, 0x8708a3d2, 0x1e01f268, 0x6906c2fe,
0xf762575d, 0x806567cb, 0x196c3671, 0x6e6b06e7,
0xfed41b76, 0x89d32be0, 0x10da7a5a, 0x67dd4acc,
0xf9b9df6f, 0x8ebeeff9, 0x17b7be43, 0x60b08ed5,
0xd6d6a3e8, 0xa1d1937e, 0x38d8c2c4, 0x4fdff252,
0xd1bb67f1, 0xa6bc5767, 0x3fb506dd, 0x48b2364b,
0xd80d2bda, 0xaf0a1b4c, 0x36034af6, 0x41047a60,
0xdf60efc3, 0xa867df55, 0x316e8eef, 0x4669be79,
0xcb61b38c, 0xbc66831a, 0x256fd2a0, 0x5268e236,
0xcc0c7795, 0xbb0b4703, 0x220216b9, 0x5505262f,
0xc5ba3bbe, 0xb2bd0b28, 0x2bb45a92, 0x5cb36a04,
0xc2d7ffa7, 0xb5d0cf31, 0x2cd99e8b, 0x5bdeae1d,
0x9b64c2b0, 0xec63f226, 0x756aa39c, 0x026d930a,
0x9c0906a9, 0xeb0e363f, 0x72076785, 0x05005713,
0x95bf4a82, 0xe2b87a14, 0x7bb12bae, 0x0cb61b38,
0x92d28e9b, 0xe5d5be0d, 0x7cdcefb7, 0x0bdbdf21,
0x86d3d2d4, 0xf1d4e242, 0x68ddb3f8, 0x1fda836e,
0x81be16cd, 0xf6b9265b, 0x6fb077e1, 0x18b74777,
0x88085ae6, 0xff0f6a70, 0x66063bca, 0x11010b5c,
0x8f659eff, 0xf862ae69, 0x616bffd3, 0x166ccf45,
0xa00ae278, 0xd70dd2ee, 0x4e048354, 0x3903b3c2,
0xa7672661, 0xd06016f7, 0x4969474d, 0x3e6e77db,
0xaed16a4a, 0xd9d65adc, 0x40df0b66, 0x37d83bf0,
0xa9bcae53, 0xdebb9ec5, 0x47b2cf7f, 0x30b5ffe9,
0xbdbdf21c, 0xcabac28a, 0x53b39330, 0x24b4a3a6,
0xbad03605, 0xcdd70693, 0x54de5729, 0x23d967bf,
0xb3667a2e, 0xc4614ab8, 0x5d681b02, 0x2a6f2b94,
0xb40bbe37, 0xc30c8ea1, 0x5a05df1b, 0x2d02ef8d,
};
unsigned long
checkcrc(FILE *fp)
{
register unsigned long crc;
int c;
crc = 0xFFFFFFFF;
if (fseek(fp, 0, SEEK_SET) == -1) {
perror("fseek");
exit(0);
}
while( (c = getc(fp)) != EOF )
crc = ((crc >> 8) & 0x00FFFFFF) ^ crctab[(crc ^ c) & 0xFF];
return (crc ^ 0xFFFFFFFF);
}
<-X->
--[ Perl Script
- multidirectory support
- directory analysis
<-| snip2/snip2.pl |->
#!/usr/bin/perl
#
# S0FTPj Y2k - Tue Aug 15 12:48:53 2000
#
# SNiP II - an extractor for Butchered From Inside
#
#
$bfidir = "bfisrc";
sub create_file
{
local($file) = @_;
$found = 0;
open(IN_FILE, $file) || die "Unable to open $file\n";
chdir($bfidir);
while (<IN_FILE>) {
if (/^\<-\|/) {
$snipfile = substr($_, 4);
$snipfile = substr($snipfile,0,index($snipfile, ' '));
@dirs = split('/',$snipfile);
$ndir = 1;
while ($dirs[$ndir]) {
mkdir($dirs[0], 0755);
$dirs[0] .= '/'.$dirs[$ndir++];
}
print "\t$snipfile\n";
open(OUT_FILE, ">$snipfile");
$found = 1;
next;
}
if (/^\<-X->/) {
close(OUT_FILE);
$found = 0;
}
print OUT_FILE $_ if($found);
}
close(IN_FILE);
chdir("..");
return 0;
}
if (!$ARGV[0]) {
print "Usage: snip2 filename-or-directory\n";
exit(0);
}
$mode = (stat($ARGV[0]))[2];
if (($mode & 0170000) == 0040000) {
opendir(DIR, $ARGV[0]) || die "Unable to open directory\n";
chdir($ARGV[0]);
mkdir($bfidir, 0755);
while ($file = readdir(DIR)) {
print "$file\n";
&create_file($file);
}
closedir(DIR);
chdir("..");
} else {
mkdir($bfidir, 0755);
&create_file($ARGV[0]);
}
<-X->
==============================================================================
---------------------------------[ EOF 21/21 ]--------------------------------
==============================================================================
