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jailuser.py
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jailuser.py
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import crypt
import getopt
import os
import sys
def jail_user(name, password):
if exist_user(name):
print("user ", name, " exist,", "please use other user name")
return
add_user(name, password)
jail_init(name)
jail_dev(name)
jail_bash(name)
sync_user(name)
append_user_sshd(name)
restart_sshd(name)
def jail_init(name):
os.system("sudo jk_init -v -j /home/"+name+" basicshell editors netutils ssh scp ping")
def jail_dev(name):
os.system("sudo mkdir -p /home/"+name+"/dev/")
os.system("sudo mknod -m 666 /home/"+name+"/dev/null c 1 3")
os.system("sudo mknod -m 666 /home/"+name+"/dev/tty c 5 0")
os.system("sudo mknod -m 666 /home/"+name+"/dev/zero c 1 5")
os.system("sudo mknod -m 666 /home/"+name+"/dev/random c 1 8")
def jail_bash(name):
os.system("sudo mkdir -p /home/"+name+"/bin/")
os.system("sudo mkdir -p /home/"+name+"/lib/")
os.system("sudo mkdir -p /home/"+name+"/lib64/")
os.system("sudo mkdir -p /home/"+name+"/lib/x86_64-linux-gnu/")
os.system("sudo cp -v /bin/bash /home/"+name+"/bin/")
os.system("sudo cp -v /lib/x86_64-linux-gnu/libncurses.so.5"
" /home/"+name+"/lib/")
os.system("sudo cp -v /lib/x86_64-linux-gnu/libtinfo.so.5"
" /home/"+name+"/lib/")
os.system("sudo cp -v /lib/x86_64-linux-gnu/libdl.so.2"
" /home/"+name+"/lib/")
os.system("sudo cp -v /lib/x86_64-linux-gnu/libc.so.6"
" /home/"+name+"/lib/")
os.system("sudo cp -v /lib64/ld-linux-x86-64.so.2"
" /home/"+name+"/lib64/")
os.system("sudo cp -va /lib/x86_64-linux-gnu/libnss_files*"
" /home/"+name+"/lib/x86_64-linux-gnu/")
enable_bash_color(name)
def enable_bash_color(name):
# os.system("sudo cp -v ~/.bashrc /home"+name+"/home/"+name+"/")
# os.system("sudo chown "+name+":"+name+" /home/"+name+"/home/"+name+"/.bashrc")
os.system("sudo cp -v /usr/bin/dircolors /home/"+name+"/usr/bin/")
file_name = "/home/"+name+"/home/"+name+"/.bashrc"
with open(file_name, "w") as bashrc_file:
bashrc_file.write("alias ls='ls --color=auto'\n")
bashrc_file.write("alias grep='grep --color=auto'\n")
bashrc_file.write("alias fgrep='fgrep --color=auto'\n")
bashrc_file.write("alias egrep='egrep --color=auto'\n")
os.system("sudo chown "+name+":"+name+" "+file_name)
def add_user(name, password):
encPass = crypt.crypt(password, "22")
os.system("sudo useradd -p"+encPass+" "+name)
os.system("sudo chsh -s /bin/bash "+name)
# /home/{name} is the jailed folder for the user
os.system("sudo mkdir -p /home/"+name+"/")
os.system("sudo chown root:root /home/"+name+"/")
os.system("sudo chmod 0755 /home/"+name+"/")
# /home/{name}/{name} is writable folder for the user
os.system("sudo mkdir -p /home/"+name+"/home/"+name+"/")
os.system("sudo chown "+name+":"+name+" /home/"+name+"/home/"+name+"/")
def exist_user(name):
users = []
with open("/etc/passwd", "r") as f:
lines = f.readlines()
for line in lines:
user = line.split(":")
if len(user) > 1:
users.append(user[0])
for user in users:
if user == name:
return True
return False
def sync_user(name):
passwd = get_passwd(name)
if passwd != "":
with open("/home/"+name+"/etc/passwd", "w") as f:
f.write(passwd)
group = get_group(name)
if group != "":
with open("/home/"+name+"/etc/group", "w") as f:
f.write(group)
def get_passwd(name):
with open("/etc/passwd", "r") as f:
lines = f.readlines()
for line in lines:
user = line.split(":")
if len(user) > 1:
if user[0] == name:
return line
return ""
def get_group(name):
with open("/etc/group", "r") as f:
lines = f.readlines()
for line in lines:
group = line.split(":")
if len(group) > 1:
if group[0] == name:
return line
return ""
def append_user_sshd(name):
#backup the old workable /etc/ssh/sshd_config
os.system("sudo cp /etc/ssh/sshd_config /etc/ssh/bak_sshd_config")
#append new user to jailed folder
with open("/etc/ssh/sshd_config", "a") as myfile:
myfile.write("\nMatch User "+name+"\n")
myfile.write(" X11Forwarding yes\n")
myfile.write(" AllowTcpForwarding yes\n")
myfile.write(" PermitTTY yes\n")
myfile.write(" ChrootDirectory /home/"+name+"/\n")
def restart_sshd(name):
result = os.system("sudo systemctl restart sshd")
print("*******************************************************************************************")
print("*******************************************************************************************")
print("*******************************************************************************************")
if result != 0:
print("restart sshd failed for jailed user "+name)
else:
print('congraturation, "'+name+'" is now jailed to folder "/home/'+name+'/"')
print('login the server with "'+name+'" account, "/home/'+name+'" is the only writable folder')
print("*******************************************************************************************")
print("*******************************************************************************************")
print("*******************************************************************************************")
def main(argv):
try:
options, args = getopt.getopt(argv, "hn:p:", ["help", "name=", "password="])
except getopt.GetoptError:
sys.exit()
name = ""
password = ""
for option, value in options:
if option in ("-h", "--help"):
print("usage: python jailuser.py --name=[NAME], --password=[PASSWORD]")
if option in ("-n", "--name"):
name = value.strip()
if option in ("-p", "--password"):
password = value.strip()
if name == "" or password == "":
print("wrong parameter")
print("usage: python jailuser.py --name=[NAME], --password=[PASSWORD]")
return
print("Start jailing user name "+name+", password "+password)
jail_user(name, password)
if __name__ == '__main__':
main(sys.argv[1:])