Quick introduction to reverse engineering for beginners

};
fwrite (buf+(3+4), real_flen, 1, f);
fclose (f);
free (buf);
// run: input output 0/1 password
// 0 for encrypt, 1 for decrypt
int main(int argc, char *argv[])
{
if (argc!=5)
{
printf ("Incorrect parameters!\n");
return 1;
};
};
if (strcmp (argv[3], "0")==0)
crypt_file (argv[1], argv[2], argv[4]);
else
if (strcmp (argv[3], "1")==0)
decrypt_file (argv[1], argv[2], argv[4]);
else
printf ("Wrong param %s\n", argv[3]);
return 0;
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