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Jail.java
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package profile;
import java.io.File;
import java.util.Vector;
import core.iface.IUnit;
import core.model.NetworkModel;
import core.model.ServerModel;
import core.profile.AStructuredProfile;
import core.unit.SimpleUnit;
import core.unit.fs.DirUnit;
import core.unit.fs.FileAppendUnit;
import core.unit.pkg.InstalledUnit;
public class Jail extends AStructuredProfile {
/*
* This class is loosely based on http://blog.dornea.nu/2016/01/15/howto-put-nginx-and-php-to-jail-in-debian-8/
*/
public Jail(ServerModel me, NetworkModel networkModel) {
super("jail", me, networkModel);
}
protected Vector<IUnit> getInstalled() {
Vector<IUnit> units = new Vector<IUnit>();
units.addElement(new InstalledUnit("libcap2_bin", "proceed", "libcap2-bin"));
//a=D : ALL, execute bit only on dirs only
//fu=rw : Files; user, R+W
//fog=r : Files; group + others, R
((ServerModel)me).getBindFsModel().addDataBindPoint("jails", "proceed", "root", "root", "a=D:fu=rw:fog=r");
return units;
}
public Vector<IUnit> buildJail(String jail) {
Vector<IUnit> units = new Vector<IUnit>();
String jailRoot = "/media/data/jails/" + jail;
String[] directories = { "/dev",
"/etc",
"/bin",
"/usr",
"/usr/lib",
"/usr/sbin",
"/usr/bin",
"/var",
"/var/run",
"/run",
"/tmp",
};
String[] etcFiles = { "services",
"localtime",
"nsswitch.conf",
"protocols",
"hosts",
"ld.so.cache",
"ld.so.conf",
"resolv.conf",
"host.conf",
};
units.addElement(new DirUnit(jail + "_jail_root", "proceed", jailRoot, "Couldn't create a base directory for your jail. Everything past here will fail."));
units.addAll(createDirs(jail, directories));
units.addElement(new SimpleUnit("libraries_symlink", jail + "_jail_root_created",
"cd " + jailRoot + ";"
+ "if [ \\$(uname -m) = \"x86_64\" ]; then;"
+ "sudo ln -s usr/lib lib64;"
+ "sudo ln -s lib lib64;"
+ "else;"
+ "sudo ln -s usr/lib lib;"
+ "fi",
"sudo readlink " + jailRoot + "/usr/lib ", "", "fail"));
units.addElement(new SimpleUnit(jail + "_dev_null", jail + "_jail_dev_created",
"sudo mknod -m 0666 " + jailRoot + "/dev/null c 1 3",
"sudo ls " + jailRoot + "/dev/null", jailRoot + "/dev/null", "pass"));
units.addElement(new SimpleUnit(jail + "_dev_random", jail + "_jail_dev_created",
"sudo mknod -m 0666 " + jailRoot + "/dev/random c 1 8",
"sudo ls " + jailRoot + "/dev/random", jailRoot + "/dev/random", "pass"));
units.addElement(new SimpleUnit(jail + "_dev_urandom", jail + "_jail_dev_created",
"sudo mknod -m 0444 " + jailRoot + "/dev/urandom c 1 9",
"sudo ls " + jailRoot + "/dev/urandom", jailRoot + "/dev/urandom", "pass"));
for (String file : etcFiles) {
units.addElement(new SimpleUnit(jail + "_jail_" + file.replace(".", "_"), jail + "_jail_etc_created",
"sudo cp -rfL /etc/" + file + " " + jailRoot + "/etc",
"sudo [ -f " + jailRoot + "/" + file + " ] && echo pass", "pass", "pass"));
}
units.addAll(addUser(jail, "nobody", "99", "99"));
return units;
}
public Vector<IUnit> addUser(String jail, String user, String uid, String gid) {
Vector<IUnit> units = new Vector<IUnit>();
String jailRoot = "/media/data/jails/" + jail;
units.addElement(new FileAppendUnit(jail + "_jail_adduser_" + user + "_passwd", jail + "_jail_etc_created", user + ":x:" + uid + ":" + gid + ":" + user + ":/:/bin/false", jailRoot + "/etc/passwd", "Could not add the user " + user + " to the jail " + jail));
units.addElement(new FileAppendUnit(jail + "_jail_addgroup_" + user, jail + "_jail_etc_created", user + ":x:" + gid + ":", jailRoot + "/etc/group", "Could not add the group " + user + " to the jail " + jail));
units.addElement(new FileAppendUnit(jail + "_jail_adduser_" + user + "_shadow", jail + "_jail_etc_created", user + ":x:14871::::::", jailRoot + "/etc/shadow", "Could not add the user " + user + " to the jail " + jail));
units.addElement(new FileAppendUnit(jail + "_jail_adduser_" + user + "_gshadow", jail + "_jail_etc_created", user + ":::", jailRoot + "/etc/gshadow", "Could not add the user " + user + " to the jail " + jail));
return units;
}
public Vector<IUnit> createDirs(String jail, String[] directories) {
Vector<IUnit> units = new Vector<IUnit>();
String jailRoot = "/media/data/jails/" + jail;
for (String dir : directories) {
units.addElement(new DirUnit(jail + "_jail" + dir.replace("/", "_"), jail + "_jail_root_created", jailRoot + dir, "Couldn't create a the " + dir + " directory for your jail. Expct weird behaviour."));
}
return units;
}
public Vector<IUnit> addBinary(String jail, String binary) {
Vector<IUnit> units = new Vector<IUnit>();
String jailRoot = "/media/data/jails/" + jail;
String name = new File(binary).getName().replace(".", "_");
/*
* Based on https://bash.cyberciti.biz/web-server/nginx-chroot-helper-bash-shell-script/
*/
units.addElement(new SimpleUnit(jail + "_add_" + name + "_dependencies", jail + "_jail_root_created",
"for file in \\$(ldd " + binary + " | awk '{ print \\\\$3 }' | sed -e '/^\\\\$/d' -e '/(*)\\\\$/d'); do;"
+ "dir=\"\\${file%/*}\";"
+ "[ ! -d " + jailRoot + "\\${dir} ] && mkdir -p " + jailRoot + "\\${dir};"
+ "sudo cp -Ll $file " + jailRoot + "${dir};"
+ "done;"
+ "ld=\"\\$(ldd " + binary + " | grep 'ld-linux' | awk '{ print \\$1 }')\";"
+ "lddir=\"\\${ld%/*}\";"
+ "[ ! -f " + jailRoot + "\\${ld} ] && sudo cp -Ll \\${ld} " + jailRoot + "\\${lddir};",
//Checks existence of all files returned in the ldd call
"for f in \\$(ldd " + binary + " | awk '{ print \\\\$3 }' | sed -e '/^\\\\$/d' -e '/(*)\\\\$/d'); do [ -e \"" + jailRoot + "\\\\$f\" ] && echo pass || echo fail ; break; done", "pass", "pass"));
return units;
}
public Vector<IUnit> copyToJail(String jail, String source) {
return copyToJail(jail, source, source);
}
public Vector<IUnit> copyToJail(String jail, String source, String destination) {
Vector<IUnit> units = new Vector<IUnit>();
String jailRoot = "/media/data/jails/" + jail;
String sourceName = new File(source).getName().replace(".", "_");
units.addElement(new SimpleUnit(jail + "_add_" + sourceName, jail + "_jail_root_created",
"sudo cp -Llr " + source + " " + jailRoot + destination,
"sudo [ -e " + jailRoot + destination + " ] && echo pass || echo fail", "pass", "pass"));
return units;
}
}