From 2bb6e8c9a956c56658807c7f2d25ab850243bbe6 Mon Sep 17 00:00:00 2001 From: Sean Leonard Date: Tue, 22 Jan 2013 22:26:08 -0700 Subject: Start rebranding: a whole lotta string replacement, moving src/ file tree --- src/se/leap/openvpn/ConfigParser.java | 559 ++++++++++++++++++++++++++++++++++ 1 file changed, 559 insertions(+) create mode 100644 src/se/leap/openvpn/ConfigParser.java (limited to 'src/se/leap/openvpn/ConfigParser.java') diff --git a/src/se/leap/openvpn/ConfigParser.java b/src/se/leap/openvpn/ConfigParser.java new file mode 100644 index 00000000..f57bbae9 --- /dev/null +++ b/src/se/leap/openvpn/ConfigParser.java @@ -0,0 +1,559 @@ +package se.leap.openvpn; + +import java.io.BufferedReader; +import java.io.IOException; +import java.io.Reader; +import java.util.HashMap; +import java.util.Locale; +import java.util.Vector; + +//! Openvpn Config FIle Parser, probably not 100% accurate but close enough + +// And rember, this is valid :) +// -- +// bar +// +public class ConfigParser { + + + private HashMap>> options = new HashMap>>(); + public void parseConfig(Reader reader) throws IOException, ConfigParseError { + + + BufferedReader br =new BufferedReader(reader); + + @SuppressWarnings("unused") + int lineno=0; + + while (true){ + String line = br.readLine(); + if(line==null) + break; + lineno++; + Vector args = parseline(line); + if(args.size() ==0) + continue; + + + if(args.get(0).startsWith("--")) + args.set(0, args.get(0).substring(2)); + + checkinlinefile(args,br); + + String optionname = args.get(0); + if(!options.containsKey(optionname)) { + options.put(optionname, new Vector>()); + } + options.get(optionname).add(args); + } + } + + private void checkinlinefile(Vector args, BufferedReader br) throws IOException, ConfigParseError { + String arg0 = args.get(0); + // CHeck for + if(arg0.startsWith("<") && arg0.endsWith(">")) { + String argname = arg0.substring(1, arg0.length()-1); + String inlinefile = VpnProfile.INLINE_TAG; + + String endtag = String.format("",argname); + do { + String line = br.readLine(); + if(line==null){ + throw new ConfigParseError(String.format("No endtag for starttag <%s> found",argname,argname)); + } + if(line.equals(endtag)) + break; + else { + inlinefile+=line; + inlinefile+= "\n"; + } + } while(true); + + args.clear(); + args.add(argname); + args.add(inlinefile); + } + + } + + enum linestate { + initial, + readin_single_quote + , reading_quoted, reading_unquoted, done} + + private boolean space(char c) { + // I really hope nobody is using zero bytes inside his/her config file + // to sperate parameter but here we go: + return Character.isWhitespace(c) || c == '\0'; + + } + + public class ConfigParseError extends Exception { + private static final long serialVersionUID = -60L; + + public ConfigParseError(String msg) { + super(msg); + } + } + + + // adapted openvpn's parse function to java + private Vector parseline(String line) throws ConfigParseError { + Vector parameters = new Vector(); + + if (line.length()==0) + return parameters; + + + linestate state = linestate.initial; + boolean backslash = false; + char out=0; + + int pos=0; + String currentarg=""; + + do { + // Emulate the c parsing ... + char in; + if(pos < line.length()) + in = line.charAt(pos); + else + in = '\0'; + + if (!backslash && in == '\\' && state != linestate.readin_single_quote) + { + backslash = true; + } + else + { + if (state == linestate.initial) + { + if (!space (in)) + { + if (in == ';' || in == '#') /* comment */ + break; + if (!backslash && in == '\"') + state = linestate.reading_quoted; + else if (!backslash && in == '\'') + state = linestate.readin_single_quote; + else + { + out = in; + state = linestate.reading_unquoted; + } + } + } + else if (state == linestate.reading_unquoted) + { + if (!backslash && space (in)) + state = linestate.done; + else + out = in; + } + else if (state == linestate.reading_quoted) + { + if (!backslash && in == '\"') + state = linestate.done; + else + out = in; + } + else if (state == linestate.readin_single_quote) + { + if (in == '\'') + state = linestate.done; + else + out = in; + } + + if (state == linestate.done) + { + /* ASSERT (parm_len > 0); */ + state = linestate.initial; + parameters.add(currentarg); + currentarg = ""; + out =0; + } + + if (backslash && out!=0) + { + if (!(out == '\\' || out == '\"' || space (out))) + { + throw new ConfigParseError("Options warning: Bad backslash ('\\') usage"); + } + } + backslash = false; + } + + /* store parameter character */ + if (out!=0) + { + currentarg+=out; + } + } while (pos++ < line.length()); + + return parameters; + } + + + final String[] unsupportedOptions = { "config", + "connection", + "proto-force", + "remote-random", + "tls-server" + + }; + + // Ignore all scripts + // in most cases these won't work and user who wish to execute scripts will + // figure out themselves + final String[] ignoreOptions = { "tls-client", + "askpass", + "auth-nocache", + "up", + "down", + "route-up", + "ipchange", + "route-up", + "route-pre-down", + "auth-user-pass-verify", + "dhcp-release", + "dhcp-renew", + "dh", + "management-hold", + "management", + "management-query-passwords", + "pause-exit", + "persist-key", + "register-dns", + "route-delay", + "route-gateway", + "route-metric", + "route-method", + "status", + "script-security", + "show-net-up", + "suppress-timestamps", + "tmp-dir", + "tun-ipv6", + "topology", + "win-sys", + }; + + + // This method is far too long + public VpnProfile convertProfile() throws ConfigParseError{ + boolean noauthtypeset=true; + VpnProfile np = new VpnProfile("converted Profile"); + // Pull, client, tls-client + np.clearDefaults(); + + if(options.containsKey("client") || options.containsKey("pull")) { + np.mUsePull=true; + options.remove("pull"); + options.remove("client"); + } + + Vector secret = getOption("secret", 1, 2); + if(secret!=null) + { + np.mAuthenticationType=VpnProfile.TYPE_STATICKEYS; + noauthtypeset=false; + np.mUseTLSAuth=true; + np.mTLSAuthFilename=secret.get(1); + if(secret.size()==3) + np.mTLSAuthDirection=secret.get(2); + + } + + Vector> routes = getAllOption("route", 1, 4); + if(routes!=null) { + String routeopt = ""; + for(Vector route:routes){ + String netmask = "255.255.255.255"; + if(route.size() >= 3) + netmask = route.get(2); + String net = route.get(1); + try { + CIDRIP cidr = new CIDRIP(net, netmask); + routeopt+=cidr.toString() + " "; + } catch (ArrayIndexOutOfBoundsException aioob) { + throw new ConfigParseError("Could not parse netmask of route " + netmask); + } catch (NumberFormatException ne) { + throw new ConfigParseError("Could not parse netmask of route " + netmask); + } + + } + np.mCustomRoutes=routeopt; + } + + // Also recognize tls-auth [inline] direction ... + Vector> tlsauthoptions = getAllOption("tls-auth", 1, 2); + if(tlsauthoptions!=null) { + for(Vector tlsauth:tlsauthoptions) { + if(tlsauth!=null) + { + if(!tlsauth.get(1).equals("[inline]")) { + np.mTLSAuthFilename=tlsauth.get(1); + np.mUseTLSAuth=true; + } + if(tlsauth.size()==3) + np.mTLSAuthDirection=tlsauth.get(2); + } + } + } + + Vector direction = getOption("key-direction", 1, 1); + if(direction!=null) + np.mTLSAuthDirection=direction.get(1); + + + if(getAllOption("redirect-gateway", 0, 5) != null) + np.mUseDefaultRoute=true; + + Vector dev =getOption("dev",1,1); + Vector devtype =getOption("dev-type",1,1); + + if( (devtype !=null && devtype.get(1).equals("tun")) || + (dev!=null && dev.get(1).startsWith("tun")) || + (devtype ==null && dev == null) ) { + //everything okay + } else { + throw new ConfigParseError("Sorry. Only tun mode is supported. See the FAQ for more detail"); + } + + + + Vector mode =getOption("mode",1,1); + if (mode != null){ + if(!mode.get(1).equals("p2p")) + throw new ConfigParseError("Invalid mode for --mode specified, need p2p"); + } + + Vector port = getOption("port", 1,1); + if(port!=null){ + np.mServerPort = port.get(1); + } + + Vector proto = getOption("proto", 1,1); + if(proto!=null){ + np.mUseUdp=isUdpProto(proto.get(1));; + } + + // Parse remote config + Vector remote = getOption("remote",1,3); + if(remote != null){ + switch (remote.size()) { + case 4: + np.mUseUdp=isUdpProto(remote.get(3)); + case 3: + np.mServerPort = remote.get(2); + case 2: + np.mServerName = remote.get(1); + } + } + + Vector> dhcpoptions = getAllOption("dhcp-option", 2, 2); + if(dhcpoptions!=null) { + for(Vector dhcpoption:dhcpoptions) { + String type=dhcpoption.get(1); + String arg = dhcpoption.get(2); + if(type.equals("DOMAIN")) { + np.mSearchDomain=dhcpoption.get(2); + } else if(type.equals("DNS")) { + np.mOverrideDNS=true; + if(np.mDNS1.equals(VpnProfile.DEFAULT_DNS1)) + np.mDNS1=arg; + else + np.mDNS2=arg; + } + } + } + + Vector ifconfig = getOption("ifconfig", 2, 2); + if(ifconfig!=null) { + CIDRIP cidr = new CIDRIP(ifconfig.get(1), ifconfig.get(2)); + np.mIPv4Address=cidr.toString(); + } + + if(getOption("remote-random-hostname", 0, 0)!=null) + np.mUseRandomHostname=true; + + if(getOption("float", 0, 0)!=null) + np.mUseFloat=true; + + if(getOption("comp-lzo", 0, 1)!=null) + np.mUseLzo=true; + + Vector cipher = getOption("cipher", 1, 1); + if(cipher!=null) + np.mCipher= cipher.get(1); + + Vector ca = getOption("ca",1,1); + if(ca!=null){ + np.mCaFilename = ca.get(1); + } + + Vector cert = getOption("cert",1,1); + if(cert!=null){ + np.mClientCertFilename = cert.get(1); + np.mAuthenticationType = VpnProfile.TYPE_CERTIFICATES; + noauthtypeset=false; + } + Vector key= getOption("key",1,1); + if(key!=null) + np.mClientKeyFilename=key.get(1); + + Vector pkcs12 = getOption("pkcs12",1,1); + if(pkcs12!=null) { + np.mPKCS12Filename = pkcs12.get(1); + np.mAuthenticationType = VpnProfile.TYPE_KEYSTORE; + noauthtypeset=false; + } + + Vector tlsremote = getOption("tls-remote",1,1); + if(tlsremote!=null){ + np.mRemoteCN = tlsremote.get(1); + np.mCheckRemoteCN=true; + } + + Vector verb = getOption("verb",1,1); + if(verb!=null){ + np.mVerb=verb.get(1); + } + + + if(getOption("nobind", 0, 0) != null) + np.mNobind=true; + + if(getOption("persist-tun", 0,0) != null) + np.mPersistTun=true; + + Vector connectretry = getOption("connect-retry", 1, 1); + if(connectretry!=null) + np.mConnectRetry =connectretry.get(1); + + Vector connectretrymax = getOption("connect-retry-max", 1, 1); + if(connectretrymax!=null) + np.mConnectRetryMax =connectretrymax.get(1); + + Vector> remotetls = getAllOption("remote-cert-tls", 1, 1); + if(remotetls!=null) + if(remotetls.get(0).get(1).equals("server")) + np.mExpectTLSCert=true; + else + options.put("remotetls",remotetls); + + Vector authuser = getOption("auth-user-pass",0,1); + if(authuser !=null){ + if(noauthtypeset) { + np.mAuthenticationType=VpnProfile.TYPE_USERPASS; + } else if(np.mAuthenticationType==VpnProfile.TYPE_CERTIFICATES) { + np.mAuthenticationType=VpnProfile.TYPE_USERPASS_CERTIFICATES; + } else if(np.mAuthenticationType==VpnProfile.TYPE_KEYSTORE) { + np.mAuthenticationType=VpnProfile.TYPE_USERPASS_KEYSTORE; + } + if(authuser.size()>1) { + // Set option value to password get to get canche to embed later. + np.mUsername=null; + np.mPassword=authuser.get(1); + useEmbbedUserAuth(np,authuser.get(1)); + } + + } + + + // Check the other options + + checkIgnoreAndInvalidOptions(np); + fixup(np); + + return np; + } + + private boolean isUdpProto(String proto) throws ConfigParseError { + boolean isudp; + if(proto.equals("udp") || proto.equals("udp6")) + isudp=true; + else if (proto.equals("tcp-client") || + proto.equals("tcp") || + proto.equals("tcp6") || + proto.endsWith("tcp6-client")) + isudp =false; + else + throw new ConfigParseError("Unsupported option to --proto " + proto); + return isudp; + } + + static public void useEmbbedUserAuth(VpnProfile np,String inlinedata) + { + String data = inlinedata.replace(VpnProfile.INLINE_TAG, ""); + String[] parts = data.split("\n"); + if(parts.length >= 2) { + np.mUsername=parts[0]; + np.mPassword=parts[1]; + } + } + + private void checkIgnoreAndInvalidOptions(VpnProfile np) throws ConfigParseError { + for(String option:unsupportedOptions) + if(options.containsKey(option)) + throw new ConfigParseError(String.format("Unsupported Option %s encountered in config file. Aborting",option)); + + for(String option:ignoreOptions) + // removing an item which is not in the map is no error + options.remove(option); + + if(options.size()> 0) { + String custom = "# These Options were found in the config file do not map to config settings:\n"; + + for(Vector> option:options.values()) { + for(Vector optionsline: option) { + for (String arg : optionsline) + custom+= VpnProfile.openVpnEscape(arg) + " "; + } + custom+="\n"; + + } + np.mCustomConfigOptions = custom; + np.mUseCustomConfig=true; + + } + } + + + private void fixup(VpnProfile np) { + if(np.mRemoteCN.equals(np.mServerName)) { + np.mRemoteCN=""; + } + } + + private Vector getOption(String option, int minarg, int maxarg) throws ConfigParseError { + Vector> alloptions = getAllOption(option, minarg, maxarg); + if(alloptions==null) + return null; + else + return alloptions.lastElement(); + } + + + private Vector> getAllOption(String option, int minarg, int maxarg) throws ConfigParseError { + Vector> args = options.get(option); + if(args==null) + return null; + + for(Vector optionline:args) + + if(optionline.size()< (minarg+1) || optionline.size() > maxarg+1) { + String err = String.format(Locale.getDefault(),"Option %s has %d parameters, expected between %d and %d", + option,optionline.size()-1,minarg,maxarg ); + throw new ConfigParseError(err); + } + options.remove(option); + return args; + } + +} + + + + -- cgit v1.2.3