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-rw-r--r--src/main/java/eu/siacs/conversations/utils/DNSHelper.java121
-rw-r--r--src/main/java/eu/siacs/conversations/xmpp/XmppConnection.java203
2 files changed, 220 insertions, 104 deletions
diff --git a/src/main/java/eu/siacs/conversations/utils/DNSHelper.java b/src/main/java/eu/siacs/conversations/utils/DNSHelper.java
index e07df627..87790d64 100644
--- a/src/main/java/eu/siacs/conversations/utils/DNSHelper.java
+++ b/src/main/java/eu/siacs/conversations/utils/DNSHelper.java
@@ -19,6 +19,7 @@ import java.util.Collections;
import java.util.List;
import java.util.Random;
import java.util.TreeMap;
+import java.util.Map;
import java.util.regex.Pattern;
import de.measite.minidns.Client;
@@ -57,7 +58,7 @@ public class DNSHelper {
if (!b.containsKey("values")) {
Log.d(Config.LOGTAG,"all dns queries failed. provide fallback A record");
ArrayList<Parcelable> values = new ArrayList<>();
- values.add(createNamePortBundle(host,5222));
+ values.add(createNamePortBundle(host, 5222, false));
b.putParcelableArrayList("values",values);
}
return b;
@@ -96,57 +97,73 @@ public class DNSHelper {
return servers;
}
- public static Bundle queryDNS(String host, InetAddress dnsServer) {
- Bundle bundle = new Bundle();
- try {
- client.setTimeout(Config.PING_TIMEOUT * 1000);
- String qname = "_xmpp-client._tcp." + host;
- Log.d(Config.LOGTAG, "using dns server: " + dnsServer.getHostAddress() + " to look up " + host);
- DNSMessage message = client.query(qname, TYPE.SRV, CLASS.IN, dnsServer.getHostAddress());
-
- TreeMap<Integer, ArrayList<SRV>> priorities = new TreeMap<>();
- TreeMap<String, ArrayList<String>> ips4 = new TreeMap<>();
- TreeMap<String, ArrayList<String>> ips6 = new TreeMap<>();
-
- for (Record[] rrset : new Record[][] { message.getAnswers(), message.getAdditionalResourceRecords() }) {
- for (Record rr : rrset) {
- Data d = rr.getPayload();
- if (d instanceof SRV && NameUtil.idnEquals(qname, rr.getName())) {
- SRV srv = (SRV) d;
- if (!priorities.containsKey(srv.getPriority())) {
- priorities.put(srv.getPriority(),new ArrayList<SRV>());
- }
- priorities.get(srv.getPriority()).add(srv);
+ private static class TlsSrv {
+ private final SRV srv;
+ private final boolean tls;
+
+ public TlsSrv(SRV srv, boolean tls) {
+ this.srv = srv;
+ this.tls = tls;
+ }
+ }
+
+ private static void fillSrvMaps(final String qname, final InetAddress dnsServer, final Map<Integer, List<TlsSrv>> priorities, final Map<String, List<String>> ips4, final Map<String, List<String>> ips6, final boolean tls) throws IOException {
+ final DNSMessage message = client.query(qname, TYPE.SRV, CLASS.IN, dnsServer.getHostAddress());
+ for (Record[] rrset : new Record[][] { message.getAnswers(), message.getAdditionalResourceRecords() }) {
+ for (Record rr : rrset) {
+ Data d = rr.getPayload();
+ if (d instanceof SRV && NameUtil.idnEquals(qname, rr.getName())) {
+ SRV srv = (SRV) d;
+ if (!priorities.containsKey(srv.getPriority())) {
+ priorities.put(srv.getPriority(),new ArrayList<TlsSrv>());
}
- if (d instanceof A) {
- A a = (A) d;
- if (!ips4.containsKey(rr.getName())) {
- ips4.put(rr.getName(), new ArrayList<String>());
- }
- ips4.get(rr.getName()).add(a.toString());
+ priorities.get(srv.getPriority()).add(new TlsSrv(srv, tls));
+ }
+ if (d instanceof A) {
+ A a = (A) d;
+ if (!ips4.containsKey(rr.getName())) {
+ ips4.put(rr.getName(), new ArrayList<String>());
}
- if (d instanceof AAAA) {
- AAAA aaaa = (AAAA) d;
- if (!ips6.containsKey(rr.getName())) {
- ips6.put(rr.getName(), new ArrayList<String>());
- }
- ips6.get(rr.getName()).add("[" + aaaa.toString() + "]");
+ ips4.get(rr.getName()).add(a.toString());
+ }
+ if (d instanceof AAAA) {
+ AAAA aaaa = (AAAA) d;
+ if (!ips6.containsKey(rr.getName())) {
+ ips6.put(rr.getName(), new ArrayList<String>());
}
+ ips6.get(rr.getName()).add("[" + aaaa.toString() + "]");
}
}
+ }
+ }
+
+ public static Bundle queryDNS(String host, InetAddress dnsServer) {
+ Bundle bundle = new Bundle();
+ try {
+ client.setTimeout(Config.PING_TIMEOUT * 1000);
+ final String qname = "_xmpp-client._tcp." + host;
+ final String tlsQname = "_xmpps-client._tcp." + host;
+ Log.d(Config.LOGTAG, "using dns server: " + dnsServer.getHostAddress() + " to look up " + host);
+
+ final Map<Integer, List<TlsSrv>> priorities = new TreeMap<>();
+ final Map<String, List<String>> ips4 = new TreeMap<>();
+ final Map<String, List<String>> ips6 = new TreeMap<>();
+
+ fillSrvMaps(qname, dnsServer, priorities, ips4, ips6, false);
+ fillSrvMaps(tlsQname, dnsServer, priorities, ips4, ips6, true);
- ArrayList<SRV> result = new ArrayList<>();
- for (ArrayList<SRV> s : priorities.values()) {
+ final List<TlsSrv> result = new ArrayList<>();
+ for (final List<TlsSrv> s : priorities.values()) {
result.addAll(s);
}
- ArrayList<Bundle> values = new ArrayList<>();
+ final ArrayList<Bundle> values = new ArrayList<>();
if (result.size() == 0) {
DNSMessage response;
try {
response = client.query(host, TYPE.A, CLASS.IN, dnsServer.getHostAddress());
for (int i = 0; i < response.getAnswers().length; ++i) {
- values.add(createNamePortBundle(host, 5222, response.getAnswers()[i].getPayload()));
+ values.add(createNamePortBundle(host, 5222, response.getAnswers()[i].getPayload(), false));
}
} catch (SocketTimeoutException e) {
Log.d(Config.LOGTAG,"ignoring timeout exception when querying A record on "+dnsServer.getHostAddress());
@@ -154,37 +171,38 @@ public class DNSHelper {
try {
response = client.query(host, TYPE.AAAA, CLASS.IN, dnsServer.getHostAddress());
for (int i = 0; i < response.getAnswers().length; ++i) {
- values.add(createNamePortBundle(host, 5222, response.getAnswers()[i].getPayload()));
+ values.add(createNamePortBundle(host, 5222, response.getAnswers()[i].getPayload(), false));
}
} catch (SocketTimeoutException e) {
Log.d(Config.LOGTAG,"ignoring timeout exception when querying AAAA record on "+dnsServer.getHostAddress());
}
- values.add(createNamePortBundle(host,5222));
+ values.add(createNamePortBundle(host, 5222, false));
bundle.putParcelableArrayList("values", values);
return bundle;
}
- for (SRV srv : result) {
+ for (final TlsSrv tlsSrv : result) {
+ final SRV srv = tlsSrv.srv;
if (ips6.containsKey(srv.getName())) {
- values.add(createNamePortBundle(srv.getName(),srv.getPort(),ips6));
+ values.add(createNamePortBundle(srv.getName(),srv.getPort(),ips6, tlsSrv.tls));
} else {
try {
DNSMessage response = client.query(srv.getName(), TYPE.AAAA, CLASS.IN, dnsServer.getHostAddress());
for (int i = 0; i < response.getAnswers().length; ++i) {
- values.add(createNamePortBundle(srv.getName(), srv.getPort(), response.getAnswers()[i].getPayload()));
+ values.add(createNamePortBundle(srv.getName(), srv.getPort(), response.getAnswers()[i].getPayload(), tlsSrv.tls));
}
} catch (SocketTimeoutException e) {
Log.d(Config.LOGTAG,"ignoring timeout exception when querying AAAA record on "+dnsServer.getHostAddress());
}
}
if (ips4.containsKey(srv.getName())) {
- values.add(createNamePortBundle(srv.getName(),srv.getPort(),ips4));
+ values.add(createNamePortBundle(srv.getName(),srv.getPort(),ips4, tlsSrv.tls));
} else {
DNSMessage response = client.query(srv.getName(), TYPE.A, CLASS.IN, dnsServer.getHostAddress());
for(int i = 0; i < response.getAnswers().length; ++i) {
- values.add(createNamePortBundle(srv.getName(),srv.getPort(),response.getAnswers()[i].getPayload()));
+ values.add(createNamePortBundle(srv.getName(),srv.getPort(),response.getAnswers()[i].getPayload(), tlsSrv.tls));
}
}
- values.add(createNamePortBundle(srv.getName(), srv.getPort()));
+ values.add(createNamePortBundle(srv.getName(), srv.getPort(), tlsSrv.tls));
}
bundle.putParcelableArrayList("values", values);
} catch (SocketTimeoutException e) {
@@ -195,28 +213,31 @@ public class DNSHelper {
return bundle;
}
- private static Bundle createNamePortBundle(String name, int port) {
+ private static Bundle createNamePortBundle(String name, int port, final boolean tls) {
Bundle namePort = new Bundle();
namePort.putString("name", name);
+ namePort.putBoolean("tls", tls);
namePort.putInt("port", port);
return namePort;
}
- private static Bundle createNamePortBundle(String name, int port, TreeMap<String, ArrayList<String>> ips) {
+ private static Bundle createNamePortBundle(String name, int port, Map<String, List<String>> ips, final boolean tls) {
Bundle namePort = new Bundle();
namePort.putString("name", name);
+ namePort.putBoolean("tls", tls);
namePort.putInt("port", port);
if (ips!=null) {
- ArrayList<String> ip = ips.get(name);
+ List<String> ip = ips.get(name);
Collections.shuffle(ip, new Random());
namePort.putString("ip", ip.get(0));
}
return namePort;
}
- private static Bundle createNamePortBundle(String name, int port, Data data) {
+ private static Bundle createNamePortBundle(String name, int port, Data data, final boolean tls) {
Bundle namePort = new Bundle();
namePort.putString("name", name);
+ namePort.putBoolean("tls", tls);
namePort.putInt("port", port);
if (data instanceof A) {
namePort.putString("ip", data.toString());
diff --git a/src/main/java/eu/siacs/conversations/xmpp/XmppConnection.java b/src/main/java/eu/siacs/conversations/xmpp/XmppConnection.java
index 4bc44ce9..be001a7f 100644
--- a/src/main/java/eu/siacs/conversations/xmpp/XmppConnection.java
+++ b/src/main/java/eu/siacs/conversations/xmpp/XmppConnection.java
@@ -20,7 +20,7 @@ import org.xmlpull.v1.XmlPullParserException;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;
-import java.io.OutputStream;
+import java.lang.reflect.Method;
import java.math.BigInteger;
import java.net.ConnectException;
import java.net.IDN;
@@ -247,6 +247,7 @@ public class XmppConnection implements Runnable {
}
Log.d(Config.LOGTAG,account.getJid().toBareJid()+": connect to "+destination+" via TOR");
socket = SocksSocketFactory.createSocketOverTor(destination,account.getPort());
+ startXmpp();
} else if (DNSHelper.isIp(account.getServer().toString())) {
socket = new Socket();
try {
@@ -254,6 +255,7 @@ public class XmppConnection implements Runnable {
} catch (IOException e) {
throw new UnknownHostException();
}
+ startXmpp();
} else {
final Bundle result = DNSHelper.getSRVRecord(account.getServer(), mXmppConnectionService);
final ArrayList<Parcelable>values = result.getParcelableArrayList("values");
@@ -269,24 +271,46 @@ public class XmppConnection implements Runnable {
}
final int srvRecordPort = namePort.getInt("port");
final String srvIpServer = namePort.getString("ip");
+ // if tls is true, encryption is implied and must not be started
+ features.encryptionEnabled = namePort.getBoolean("tls");
final InetSocketAddress addr;
if (srvIpServer != null) {
addr = new InetSocketAddress(srvIpServer, srvRecordPort);
Log.d(Config.LOGTAG, account.getJid().toBareJid().toString()
+ ": using values from dns " + srvRecordServer
- + "[" + srvIpServer + "]:" + srvRecordPort);
+ + "[" + srvIpServer + "]:" + srvRecordPort + " tls: " + features.encryptionEnabled);
} else {
addr = new InetSocketAddress(srvRecordServer, srvRecordPort);
Log.d(Config.LOGTAG, account.getJid().toBareJid().toString()
+ ": using values from dns "
- + srvRecordServer + ":" + srvRecordPort);
+ + srvRecordServer + ":" + srvRecordPort + " tls: " + features.encryptionEnabled);
}
- socket = new Socket();
- socket.connect(addr, Config.SOCKET_TIMEOUT * 1000);
- tagWriter.setOutputStream(socket.getOutputStream());
- tagReader.setInputStream(socket.getInputStream());
- tagWriter.beginDocument();
- sendStartStream();
+
+ if (!features.encryptionEnabled) {
+ socket = new Socket();
+ socket.connect(addr, Config.SOCKET_TIMEOUT * 1000);
+ } else {
+ final TlsFactoryVerifier tlsFactoryVerifier = getTlsFactoryVerifier();
+ socket = tlsFactoryVerifier.factory.createSocket();
+
+ if (socket == null) {
+ throw new IOException("could not initialize ssl socket");
+ }
+
+ setSSLSocketSecurity((SSLSocket) socket);
+ this.setSNIHost(tlsFactoryVerifier.factory, (SSLSocket) socket, account.getServer().getDomainpart());
+ this.setAlpnProtocol(tlsFactoryVerifier.factory, (SSLSocket) socket, "xmpp-client");
+
+ socket.connect(addr, Config.SOCKET_TIMEOUT * 1000);
+
+ if (!tlsFactoryVerifier.verifier.verify(account.getServer().getDomainpart(), ((SSLSocket) socket).getSession())) {
+ Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": TLS certificate verification failed");
+ throw new SecurityException();
+ }
+ }
+
+ if(startXmpp())
+ break; // successfully connected to server that speaks xmpp
} catch (final Throwable e) {
Log.d(Config.LOGTAG, account.getJid().toBareJid().toString() + ": " + e.getMessage() +"("+e.getClass().getName()+")");
if (!iterator.hasNext()) {
@@ -295,18 +319,7 @@ public class XmppConnection implements Runnable {
}
}
}
- Tag nextTag;
- while ((nextTag = tagReader.readTag()) != null) {
- if (nextTag.isStart("stream")) {
- processStream();
- break;
- } else {
- throw new IOException("unknown tag on connect");
- }
- }
- if (socket.isConnected()) {
- socket.close();
- }
+ processStream();
} catch (final IncompatibleServerException e) {
this.changeStatus(Account.State.INCOMPATIBLE_SERVER);
} catch (final SecurityException e) {
@@ -338,6 +351,99 @@ public class XmppConnection implements Runnable {
}
}
+ /**
+ * Starts xmpp protocol, call after connecting to socket
+ * @return true if server returns with valid xmpp, false otherwise
+ * @throws IOException Unknown tag on connect
+ * @throws XmlPullParserException Bad Xml
+ * @throws NoSuchAlgorithmException Other error
+ */
+ private boolean startXmpp() throws IOException, XmlPullParserException, NoSuchAlgorithmException {
+ tagWriter.setOutputStream(socket.getOutputStream());
+ tagReader.setInputStream(socket.getInputStream());
+ tagWriter.beginDocument();
+ sendStartStream();
+ Tag nextTag;
+ while ((nextTag = tagReader.readTag()) != null) {
+ if (nextTag.isStart("stream")) {
+ return true;
+ } else {
+ throw new IOException("unknown tag on connect");
+ }
+ }
+ if (socket.isConnected()) {
+ socket.close();
+ }
+ return false;
+ }
+
+ private void setSNIHost(final SSLSocketFactory factory, final SSLSocket socket, final String hostname) {
+ if (factory instanceof android.net.SSLCertificateSocketFactory && android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.JELLY_BEAN_MR1) {
+ ((android.net.SSLCertificateSocketFactory) factory).setHostname(socket, hostname);
+ } else {
+ try {
+ socket.getClass().getMethod("setHostname", String.class).invoke(socket, hostname);
+ } catch (Throwable e) {
+ // ignore any error, we just can't set the hostname...
+ }
+ }
+ }
+
+ private void setAlpnProtocol(final SSLSocketFactory factory, final SSLSocket socket, final String protocol) {
+ try {
+ if (factory instanceof android.net.SSLCertificateSocketFactory && android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.KITKAT) {
+ // can't call directly because of @hide?
+ //((android.net.SSLCertificateSocketFactory)factory).setAlpnProtocols(new byte[][]{protocol.getBytes("UTF-8")});
+ android.net.SSLCertificateSocketFactory.class.getMethod("setAlpnProtocols", byte[][].class).invoke(socket, new Object[]{new byte[][]{protocol.getBytes("UTF-8")}});
+ } else {
+ final Method method = socket.getClass().getMethod("setAlpnProtocols", byte[].class);
+ // the concatenation of 8-bit, length prefixed protocol names, just one in our case...
+ // http://tools.ietf.org/html/draft-agl-tls-nextprotoneg-04#page-4
+ final byte[] protocolUTF8Bytes = protocol.getBytes("UTF-8");
+ final byte[] lengthPrefixedProtocols = new byte[protocolUTF8Bytes.length + 1];
+ lengthPrefixedProtocols[0] = (byte) protocol.length(); // cannot be over 255 anyhow
+ System.arraycopy(protocolUTF8Bytes, 0, lengthPrefixedProtocols, 1, protocolUTF8Bytes.length);
+ method.invoke(socket, new Object[]{lengthPrefixedProtocols});
+ }
+ } catch (Throwable e) {
+ // ignore any error, we just can't set the alpn protocol...
+ }
+ }
+
+ private static class TlsFactoryVerifier {
+ private final SSLSocketFactory factory;
+ private final HostnameVerifier verifier;
+
+ public TlsFactoryVerifier(final SSLSocketFactory factory, final HostnameVerifier verifier) throws IOException {
+ this.factory = factory;
+ this.verifier = verifier;
+ if (factory == null || verifier == null) {
+ throw new IOException("could not setup ssl");
+ }
+ }
+ }
+
+ private TlsFactoryVerifier getTlsFactoryVerifier() throws NoSuchAlgorithmException, KeyManagementException, IOException {
+ final SSLContext sc = SSLContext.getInstance("TLS");
+ MemorizingTrustManager trustManager = this.mXmppConnectionService.getMemorizingTrustManager();
+ KeyManager[] keyManager;
+ if (account.getPrivateKeyAlias() != null && account.getPassword().isEmpty()) {
+ keyManager = new KeyManager[]{mKeyManager};
+ } else {
+ keyManager = null;
+ }
+ sc.init(keyManager, new X509TrustManager[]{mInteractive ? trustManager : trustManager.getNonInteractive()}, mXmppConnectionService.getRNG());
+ final SSLSocketFactory factory = sc.getSocketFactory();
+ final HostnameVerifier verifier;
+ if (mInteractive) {
+ verifier = trustManager.wrapHostnameVerifier(new XmppDomainVerifier());
+ } else {
+ verifier = trustManager.wrapHostnameVerifierNonInteractive(new XmppDomainVerifier());
+ }
+
+ return new TlsFactoryVerifier(factory, verifier);
+ }
+
@Override
public void run() {
try {
@@ -599,53 +705,42 @@ public class XmppConnection implements Runnable {
tagWriter.writeTag(startTLS);
}
+ private void setSSLSocketSecurity(final SSLSocket sslSocket) throws NoSuchAlgorithmException {
+ final String[] supportProtocols;
+ final Collection<String> supportedProtocols = new LinkedList<>(
+ Arrays.asList(sslSocket.getSupportedProtocols()));
+ supportedProtocols.remove("SSLv3");
+ supportProtocols = supportedProtocols.toArray(new String[supportedProtocols.size()]);
+
+ sslSocket.setEnabledProtocols(supportProtocols);
+
+ final String[] cipherSuites = CryptoHelper.getOrderedCipherSuites(
+ sslSocket.getSupportedCipherSuites());
+ //Log.d(Config.LOGTAG, "Using ciphers: " + Arrays.toString(cipherSuites));
+ if (cipherSuites.length > 0) {
+ sslSocket.setEnabledCipherSuites(cipherSuites);
+ }
+ }
+
private void switchOverToTls(final Tag currentTag) throws XmlPullParserException, IOException {
tagReader.readTag();
try {
- final SSLContext sc = SSLContext.getInstance("TLS");
- MemorizingTrustManager trustManager = this.mXmppConnectionService.getMemorizingTrustManager();
- KeyManager[] keyManager;
- if (account.getPrivateKeyAlias() != null && account.getPassword().isEmpty()) {
- keyManager = new KeyManager[]{ mKeyManager };
- } else {
- keyManager = null;
- }
- sc.init(keyManager,new X509TrustManager[]{mInteractive ? trustManager : trustManager.getNonInteractive()},mXmppConnectionService.getRNG());
- final SSLSocketFactory factory = sc.getSocketFactory();
- final HostnameVerifier verifier;
- if (mInteractive) {
- verifier = trustManager.wrapHostnameVerifier(new XmppDomainVerifier());
- } else {
- verifier = trustManager.wrapHostnameVerifierNonInteractive(new XmppDomainVerifier());
- }
+ final TlsFactoryVerifier tlsFactoryVerifier = getTlsFactoryVerifier();
final InetAddress address = socket == null ? null : socket.getInetAddress();
- if (factory == null || address == null || verifier == null) {
+ if (address == null) {
throw new IOException("could not setup ssl");
}
- final SSLSocket sslSocket = (SSLSocket) factory.createSocket(socket,address.getHostAddress(), socket.getPort(),true);
+ final SSLSocket sslSocket = (SSLSocket) tlsFactoryVerifier.factory.createSocket(socket, address.getHostAddress(), socket.getPort(), true);
if (sslSocket == null) {
throw new IOException("could not initialize ssl socket");
}
- final String[] supportProtocols;
- final Collection<String> supportedProtocols = new LinkedList<>(
- Arrays.asList(sslSocket.getSupportedProtocols()));
- supportedProtocols.remove("SSLv3");
- supportProtocols = supportedProtocols.toArray(new String[supportedProtocols.size()]);
-
- sslSocket.setEnabledProtocols(supportProtocols);
-
- final String[] cipherSuites = CryptoHelper.getOrderedCipherSuites(
- sslSocket.getSupportedCipherSuites());
- //Log.d(Config.LOGTAG, "Using ciphers: " + Arrays.toString(cipherSuites));
- if (cipherSuites.length > 0) {
- sslSocket.setEnabledCipherSuites(cipherSuites);
- }
+ setSSLSocketSecurity(sslSocket);
- if (!verifier.verify(account.getServer().getDomainpart(),sslSocket.getSession())) {
+ if (!tlsFactoryVerifier.verifier.verify(account.getServer().getDomainpart(), sslSocket.getSession())) {
Log.d(Config.LOGTAG,account.getJid().toBareJid()+": TLS certificate verification failed");
throw new SecurityException();
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-09 05:23:41 +0000