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/*
* [cdump 0.1 by PoWeR_PoRK of netric (http://www.netric.org)]
*  
*  Simple pipe driven utility for creating c-style char decs from binary
*  input. Can be of use for embedding shellcode etc in c sourcefiles.
*  Do "./shdump -h" for a usage overview.
*/

#include <stdio.h>

char usage[] =
"Usage: ./cdump [-h][-n <var name>][-u][-s <linesize>][-c [-cu]]n"
"Pipe driven utility for coverting binary data to c char declaration.n"
"Example: cat binfile | ./shdump -u -s 20 >> bin.cn"
"This adds the contents of binfile to bin.c in char declaration formatnn"

"-h <var name> See this usage overviewn"
"-n            Name of the char identifier (maxsize=30, default=foobar)n"
"-u            Set this to uppercase the hex outputn"
"-s <linesize> Set the maximum line size per byte input (default=10)n"
"-c            Comment the byte offsets into the outputn"
"-cu           Set this to uppercase hex chars in byte offset commentn";

int main(int argc, char **argv[])
{
  int i = -2,oldi, lsize = 10, ucase = 0, npar = 1, cc = 1, cmt = 0, cucase = 0;
  unsigned long place = 0;
  char c, vname[31];
  vname[30] = 0;
  strncpy(&vname, "foobar", 30);
 
  if(argc > 1){
    if(!strncmp(argv[1], "-h", 2)){
      printf("%s", &usage);
      exit(0);
    }
  
    while(npar <= 5 && npar <= (argc - 1)){
      if(!strncmp(argv[npar], "-n", 2)){      
        strncpy(&vname, argv[npar+1], 30);
        npar+=2;
      }else if(!strncmp(argv[npar], "-u", 2)){
        ucase = 1;
        npar++;
      }else if(!strncmp(argv[npar], "-s", 2)){
        lsize = atoi(argv[npar+1]);
        npar+=2;
      }else if(!strncmp(argv[npar], "-c", 2)){
        cmt = 1;
        npar++;
        if(npar <= (argc - 1)){
          if(!strncmp(argv[npar], "-cu", 3)){
            cucase = 1;
            npar++;
          }
        }
      }else{
        npar = argc;
      }
    }

  }

  if(strchr((char *)&vname, 37) != NULL){
    printf("Cheeky Bastard! :P (fmt exploitation not allowed)n");
    exit(0);
  }

  oldi = getchar();
  printf("char %s =n/* 0000:0000 */ "", (char *)&vname);
  while(oldi != EOF )
    {
        if( ucase == 0 ){
          printf("x%.2x", oldi);
        }else if( ucase == 1 ){
          printf("x%.2X", oldi);
        }
        if(cc >= lsize){
          if(cmt == 1){
            place += cc;
            if(cucase == 1){
              printf(""n/* %.4X:%.4X */ ", *((unsigned short *)&place + 1), *((unsigned short *)&place));
            }else{
              printf(""n/* %.4x:%.4x */ ", *((unsigned short *)&place + 1), *((unsigned short *)&place));
            }
          }else{
            printf(""n");
          }
          printf(""");
          cc = 0;
        }
        cc++;
      oldi = getchar();
    }
  printf("";n");
  return 0;
}