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/*
* active port forwarder - software for secure forwarding
* Copyright (C) 2003,2004,2005 jeremian <jeremian [at] poczta.fm>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
*/
#include <config.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/wait.h>
#include <pwd.h>
static char* home_dir = NULL;
static char* home_dir_key = NULL;
static char* home_dir_cer = NULL;
int
create_apf_dir()
{
int length;
struct stat buf;
struct passwd *user = getpwuid(getuid());
if (user == NULL) {
return 1; /* some problems witch fetching user info*/
}
if (user->pw_dir == NULL) {
return 2; /* home directory is not set? */
}
if (home_dir) {
free(home_dir);
home_dir = NULL;
}
length = strlen(user->pw_dir);
home_dir = calloc(1, length + 6);
if (home_dir == NULL) {
return 3; /* calloc failed */
}
strcpy(home_dir, user->pw_dir);
if (home_dir[length] == '/') {
strcpy(&home_dir[length], ".apf");
}
else {
strcpy(&home_dir[length], "/.apf");
}
if (stat(home_dir, &buf)) {
if (mkdir(home_dir, 0700)) {
return 4; /* creating directory failed */
}
}
return 0;
}
int
generate_rsa_key(char** keyfile)
{
int key_length, home_length, status;
char openssl_cmd[101];
struct stat buf;
/* check in local directory first */
if (stat(*keyfile, &buf) == 0) {
return 0;
}
/* check in home_dir */
key_length = strlen(*keyfile);
home_length = strlen(home_dir);
if (home_dir_key) {
free(home_dir_key);
home_dir_key = NULL;
}
home_dir_key = calloc(1, home_length + key_length + 2);
if (home_dir_key == NULL) {
return 1; /* calloc failed */
}
strcpy(home_dir_key, home_dir);
home_dir_key[home_length] = '/';
strcpy(&home_dir_key[home_length+1], *keyfile);
*keyfile = home_dir_key;
if (stat(home_dir_key, &buf) == 0) {
return 0;
}
/* have to generate the key */
if (snprintf(openssl_cmd, 101, "openssl genrsa -out %s 2048", home_dir_key) > 100) {
return 2; /* string is too long */
}
status = system(openssl_cmd);
if (status == -1) {
return -1;
}
return WEXITSTATUS(status);
}
int
generate_certificate(char** cerfile, char* keyfile)
{
int cer_length, home_length, status, tmp_fd1, tmp_fd2;
char openssl_cmd[301];
struct stat buf;
/* check in local directory first */
if (stat(*cerfile, &buf) == 0) {
return 0;
}
/* check in home_dir */
cer_length = strlen(*cerfile);
home_length = strlen(home_dir);
if (home_dir_cer) {
free(home_dir_cer);
home_dir_cer = NULL;
}
home_dir_cer = calloc(1, home_length + cer_length + 2);
if (home_dir_cer == NULL) {
return 1; /* calloc failed */
}
strcpy(home_dir_cer, home_dir);
home_dir_cer[home_length] = '/';
strcpy(&home_dir_cer[home_length+1], *cerfile);
*cerfile = home_dir_cer;
if (stat(home_dir_cer, &buf) == 0) {
return 0;
}
/* have to generate the certificate */
if (snprintf(openssl_cmd, 201, "echo -e \"pl\nWar-Maz\nOlsztyn\nSHEG\nUtils productions\njeremian\njeremian@poczta.fm\" | openssl req -new -x509 -key %s -out %s -days 1095", keyfile, home_dir_cer) > 300) {
return 2; /* string is too long */
}
tmp_fd1 = dup(STDOUT_FILENO);
tmp_fd2 = dup(STDERR_FILENO);
close(STDOUT_FILENO);
close(STDERR_FILENO);
status = system(openssl_cmd);
dup2(tmp_fd1, STDOUT_FILENO);
dup2(tmp_fd2, STDERR_FILENO);
close(tmp_fd1);
close(tmp_fd2);
if (status == -1) {
return -1;
}
return WEXITSTATUS(status);
}
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