/*
* Get the active protocol versions.
*
* In TLS 1.1, many weak or vulnerable cipher suites were obsoleted,
* such as TLS_RSA_EXPORT_WITH_RC4_40_MD5. The implementation MUST NOT
* negotiate these cipher suites in TLS 1.1 or later mode.
*
* For example, if "TLS_RSA_EXPORT_WITH_RC4_40_MD5" is the
* only enabled cipher suite, the client cannot request TLS 1.1 or
* later, even though TLS 1.1 or later is enabled. We need to create a
* subset of the enabled protocols, called the active protocols, which
* contains protocols appropriate to the list of enabled Ciphersuites.
*
* Return empty list instead of null if no active protocol versions.
*/
ProtocolList getActiveProtocols() {
if (activeProtocols == null) {
ArrayList<ProtocolVersion> protocols = new ArrayList<>(4);
for (ProtocolVersion protocol : enabledProtocols.collection()) {
boolean found = false;
for (CipherSuite suite : enabledCipherSuites.collection()) {
if (suite.isAvailable()
&& suite.obsoleted > protocol.v
&& suite.supported <= protocol.v) {
if (algorithmConstraints.permits(
EnumSet.of(CryptoPrimitive.KEY_AGREEMENT), suite.name, null)) {
protocols.add(protocol);
found = true;
break;
} else if (debug != null && Debug.isOn("verbose")) {
System.out.println("Ignoring disabled cipher suite: " + suite + " for " + protocol);
}
} else if (debug != null && Debug.isOn("verbose")) {
System.out.println("Ignoring unsupported cipher suite: " + suite + " for " + protocol);
}
}
if (!found && (debug != null) && Debug.isOn("handshake")) {
System.out.println("No available cipher suite for " + protocol);
}
}
activeProtocols = new ProtocolList(protocols);
}
return activeProtocols;
}
/*
* Sends a change cipher spec message and updates the write side
* cipher state so that future messages use the just-negotiated spec.
*/
void sendChangeCipherSpec(Finished mesg, boolean lastMessage) throws IOException {
output.flush(); // i.e. handshake data
/*
* The write cipher state is protected by the connection write lock
* so we must grab it while making the change. We also
* make sure no writes occur between sending the ChangeCipherSpec
* message, installing the new cipher state, and sending the
* Finished message.
*
* We already hold SSLEngine/SSLSocket "this" by virtue
* of this being called from the readRecord code.
*/
OutputRecord r;
if (conn != null) {
r = new OutputRecord(Record.ct_change_cipher_spec);
} else {
r = new EngineOutputRecord(Record.ct_change_cipher_spec, engine);
}
r.setVersion(protocolVersion);
r.write(1); // single byte of data
if (conn != null) {
conn.writeLock.lock();
try {
conn.writeRecord(r);
conn.changeWriteCiphers();
if (debug != null && Debug.isOn("handshake")) {
mesg.print(System.out);
}
mesg.write(output);
output.flush();
} finally {
conn.writeLock.unlock();
}
} else {
synchronized (engine.writeLock) {
engine.writeRecord((EngineOutputRecord) r);
engine.changeWriteCiphers();
if (debug != null && Debug.isOn("handshake")) {
mesg.print(System.out);
}
mesg.write(output);
if (lastMessage) {
output.setFinishedMsg();
}
output.flush();
}
}
}
protected void sendRequest(PrintWriter out, String[] msg) {
for (int i = 0; i < msg.length; i++) {
if (Debug.get(Debug.Communication)) {
System.err.println(">>>" + msg[i]);
}
out.print(msg[i] + crlf);
}
if (Debug.get(Debug.Communication)) {
System.err.println(">>>");
}
out.print(crlf);
out.flush();
}
/**
* Get the active cipher suites.
*
* <p>In TLS 1.1, many weak or vulnerable cipher suites were obsoleted, such as
* TLS_RSA_EXPORT_WITH_RC4_40_MD5. The implementation MUST NOT negotiate these cipher suites in
* TLS 1.1 or later mode.
*
* <p>Therefore, when the active protocols only include TLS 1.1 or later, the client cannot
* request to negotiate those obsoleted cipher suites. That is, the obsoleted suites should not be
* included in the client hello. So we need to create a subset of the enabled cipher suites, the
* active cipher suites, which does not contain obsoleted cipher suites of the minimum active
* protocol.
*
* <p>Return empty list instead of null if no active cipher suites.
*/
CipherSuiteList getActiveCipherSuites() {
if (activeCipherSuites == null) {
if (activeProtocols == null) {
activeProtocols = getActiveProtocols();
}
ArrayList<CipherSuite> suites = new ArrayList<>();
if (!(activeProtocols.collection().isEmpty())
&& activeProtocols.min.v != ProtocolVersion.NONE.v) {
for (CipherSuite suite : enabledCipherSuites.collection()) {
if (suite.obsoleted > activeProtocols.min.v && suite.supported <= activeProtocols.max.v) {
if (algorithmConstraints.permits(
EnumSet.of(CryptoPrimitive.KEY_AGREEMENT), suite.name, null)) {
suites.add(suite);
}
} else if (debug != null && Debug.isOn("verbose")) {
if (suite.obsoleted <= activeProtocols.min.v) {
System.out.println("Ignoring obsoleted cipher suite: " + suite);
} else {
System.out.println("Ignoring unsupported cipher suite: " + suite);
}
}
}
}
activeCipherSuites = new CipherSuiteList(suites);
}
return activeCipherSuites;
}
public SSLResult fingerprint() throws IOException, FingerprintError {
SSLConfigCollector scc;
scc = new SSLConfigCollector(host, port, si);
scc.setCertValidator(cv);
startDate = new Date();
sslSupport = SSLResult.UNKNOWN;
// If a delay is set, wait some time, except for
// the first request
if (!initial && (delay > 0)) {
if (Debug.get(Debug.Delay)) {
System.err.println("Delaying request.");
}
try {
Thread.sleep(delay);
} catch (InterruptedException e) {
Thread.currentThread().interrupt();
}
}
initial = false;
try {
scc.probe();
sslSupport = SSLResult.SUPPORTED;
sslSupportReason = null;
} catch (NoSSLException e) {
// This exception is thrown when the protocol support
// for ssl is not available
sslSupport = SSLResult.UNSUPPORTED;
sslSupportReason = e.toString();
} catch (FingerprintException e) {
sslSupport = SSLResult.UNSUPPORTED;
sslSupportReason = e.toString();
} catch (IOException e) {
sslSupport = SSLResult.UNKNOWN;
sslSupportReason = e.toString();
}
endDate = new Date();
protos = scc.getSupportedProtos();
ProbeResult pres =
new ProbeResult(
host,
port,
startDate,
endDate,
sslSupport,
sslSupportReason,
scc.getServerCertificates(),
scc.serverCertificateVerifies(),
scc.serverCertNameMatch());
pres.setProtosResult(protos);
return pres;
}
public void setCredentials(String uid, String pass) {
authID = uid;
authPW = pass;
if (Debug.get(Debug.SockInit)) {
System.err.println("HttpProxySocketInitialiser: " + " uid " + authID + " pw " + authPW);
}
}
private void init(
SSLContextImpl context,
ProtocolList enabledProtocols,
boolean needCertVerify,
boolean isClient,
ProtocolVersion activeProtocolVersion,
boolean isInitialHandshake,
boolean secureRenegotiation,
byte[] clientVerifyData,
byte[] serverVerifyData) {
if (debug != null && Debug.isOn("handshake")) {
System.out.println(
"Allow unsafe renegotiation: "
+ allowUnsafeRenegotiation
+ "\nAllow legacy hello messages: "
+ allowLegacyHelloMessages
+ "\nIs initial handshake: "
+ isInitialHandshake
+ "\nIs secure renegotiation: "
+ secureRenegotiation);
}
this.sslContext = context;
this.isClient = isClient;
this.needCertVerify = needCertVerify;
this.activeProtocolVersion = activeProtocolVersion;
this.isInitialHandshake = isInitialHandshake;
this.secureRenegotiation = secureRenegotiation;
this.clientVerifyData = clientVerifyData;
this.serverVerifyData = serverVerifyData;
enableNewSession = true;
invalidated = false;
setCipherSuite(CipherSuite.C_NULL);
setEnabledProtocols(enabledProtocols);
if (conn != null) {
algorithmConstraints = new SSLAlgorithmConstraints(conn, true);
} else { // engine != null
algorithmConstraints = new SSLAlgorithmConstraints(engine, true);
}
//
// In addition to the connection state machine, controlling
// how the connection deals with the different sorts of records
// that get sent (notably handshake transitions!), there's
// also a handshaking state machine that controls message
// sequencing.
//
// It's a convenient artifact of the protocol that this can,
// with only a couple of minor exceptions, be driven by the
// type constant for the last message seen: except for the
// client's cert verify, those constants are in a convenient
// order to drastically simplify state machine checking.
//
state = -2; // initialized but not activated
}
/*
* Used to kickstart the negotiation ... either writing a
* ClientHello or a HelloRequest as appropriate, whichever
* the subclass returns. NOP if handshaking's already started.
*/
void kickstart() throws IOException {
if (state >= 0) {
return;
}
HandshakeMessage m = getKickstartMessage();
if (debug != null && Debug.isOn("handshake")) {
m.print(System.out);
}
m.write(output);
output.flush();
state = m.messageType();
}
protected void prepareAuthorisation(String authVal) throws FingerprintError {
if (authVal == null) {
throw new HttpProxyError("Authentication " + "challenge missing");
}
int idx = authVal.indexOf(' ');
String scheme = authVal.substring(0, idx).toLowerCase();
String param;
if (authVal.length() > idx) {
param = authVal.substring(idx + 1);
} else {
param = "";
}
if (!scheme.equals("basic")) {
throw new HttpProxyError("Auth scheme '" + scheme + "' not supported");
}
if (Debug.get(Debug.SockInit)) {
System.err.println("prepareAuthorisation: " + "using scheme " + scheme);
}
authenticator = "Basic " + Base64.encode(authID + ":" + authPW);
if (Debug.get(Debug.SockInit)) {
System.err.println("prepareAuthorisation: auth=" + authenticator);
}
}
/**
* Handshaker ... processes handshake records from an SSL V3.0 data stream, handling all the details
* of the handshake protocol.
*
* <p>Note that the real protocol work is done in two subclasses, the base class just provides the
* control flow and key generation framework.
*
* @author David Brownell
*/
abstract class Handshaker {
// protocol version being established using this Handshaker
ProtocolVersion protocolVersion;
// the currently active protocol version during a renegotiation
ProtocolVersion activeProtocolVersion;
// security parameters for secure renegotiation.
boolean secureRenegotiation;
byte[] clientVerifyData;
byte[] serverVerifyData;
// Is it an initial negotiation or a renegotiation?
boolean isInitialHandshake;
// List of enabled protocols
private ProtocolList enabledProtocols;
// List of enabled CipherSuites
private CipherSuiteList enabledCipherSuites;
// The endpoint identification protocol
String identificationProtocol;
// The cryptographic algorithm constraints
private AlgorithmConstraints algorithmConstraints = null;
// Local supported signature and algorithms
Collection<SignatureAndHashAlgorithm> localSupportedSignAlgs;
// Peer supported signature and algorithms
Collection<SignatureAndHashAlgorithm> peerSupportedSignAlgs;
/*
/*
* List of active protocols
*
* Active protocols is a subset of enabled protocols, and will
* contain only those protocols that have vaild cipher suites
* enabled.
*/
private ProtocolList activeProtocols;
/*
* List of active cipher suites
*
* Active cipher suites is a subset of enabled cipher suites, and will
* contain only those cipher suites available for the active protocols.
*/
private CipherSuiteList activeCipherSuites;
private boolean isClient;
private boolean needCertVerify;
SSLSocketImpl conn = null;
SSLEngineImpl engine = null;
HandshakeHash handshakeHash;
HandshakeInStream input;
HandshakeOutStream output;
int state;
SSLContextImpl sslContext;
RandomCookie clnt_random, svr_random;
SSLSessionImpl session;
// current CipherSuite. Never null, initially SSL_NULL_WITH_NULL_NULL
CipherSuite cipherSuite;
// current key exchange. Never null, initially K_NULL
KeyExchange keyExchange;
/* True if this session is being resumed (fast handshake) */
boolean resumingSession;
/* True if it's OK to start a new SSL session */
boolean enableNewSession;
// Temporary storage for the individual keys. Set by
// calculateConnectionKeys() and cleared once the ciphers are
// activated.
private SecretKey clntWriteKey, svrWriteKey;
private IvParameterSpec clntWriteIV, svrWriteIV;
private SecretKey clntMacSecret, svrMacSecret;
/*
* Delegated task subsystem data structures.
*
* If thrown is set, we need to propagate this back immediately
* on entry into processMessage().
*
* Data is protected by the SSLEngine.this lock.
*/
private volatile boolean taskDelegated = false;
private volatile DelegatedTask delegatedTask = null;
private volatile Exception thrown = null;
// Could probably use a java.util.concurrent.atomic.AtomicReference
// here instead of using this lock. Consider changing.
private Object thrownLock = new Object();
/* Class and subclass dynamic debugging support */
static final Debug debug = Debug.getInstance("ssl");
// By default, disable the unsafe legacy session renegotiation
static final boolean allowUnsafeRenegotiation =
Debug.getBooleanProperty("sun.security.ssl.allowUnsafeRenegotiation", false);
// For maximum interoperability and backward compatibility, RFC 5746
// allows server (or client) to accept ClientHello (or ServerHello)
// message without the secure renegotiation_info extension or SCSV.
//
// For maximum security, RFC 5746 also allows server (or client) to
// reject such message with a fatal "handshake_failure" alert.
//
// By default, allow such legacy hello messages.
static final boolean allowLegacyHelloMessages =
Debug.getBooleanProperty("sun.security.ssl.allowLegacyHelloMessages", true);
// need to dispose the object when it is invalidated
boolean invalidated;
Handshaker(
SSLSocketImpl c,
SSLContextImpl context,
ProtocolList enabledProtocols,
boolean needCertVerify,
boolean isClient,
ProtocolVersion activeProtocolVersion,
boolean isInitialHandshake,
boolean secureRenegotiation,
byte[] clientVerifyData,
byte[] serverVerifyData) {
this.conn = c;
init(
context,
enabledProtocols,
needCertVerify,
isClient,
activeProtocolVersion,
isInitialHandshake,
secureRenegotiation,
clientVerifyData,
serverVerifyData);
}
Handshaker(
SSLEngineImpl engine,
SSLContextImpl context,
ProtocolList enabledProtocols,
boolean needCertVerify,
boolean isClient,
ProtocolVersion activeProtocolVersion,
boolean isInitialHandshake,
boolean secureRenegotiation,
byte[] clientVerifyData,
byte[] serverVerifyData) {
this.engine = engine;
init(
context,
enabledProtocols,
needCertVerify,
isClient,
activeProtocolVersion,
isInitialHandshake,
secureRenegotiation,
clientVerifyData,
serverVerifyData);
}
private void init(
SSLContextImpl context,
ProtocolList enabledProtocols,
boolean needCertVerify,
boolean isClient,
ProtocolVersion activeProtocolVersion,
boolean isInitialHandshake,
boolean secureRenegotiation,
byte[] clientVerifyData,
byte[] serverVerifyData) {
if (debug != null && Debug.isOn("handshake")) {
System.out.println(
"Allow unsafe renegotiation: "
+ allowUnsafeRenegotiation
+ "\nAllow legacy hello messages: "
+ allowLegacyHelloMessages
+ "\nIs initial handshake: "
+ isInitialHandshake
+ "\nIs secure renegotiation: "
+ secureRenegotiation);
}
this.sslContext = context;
this.isClient = isClient;
this.needCertVerify = needCertVerify;
this.activeProtocolVersion = activeProtocolVersion;
this.isInitialHandshake = isInitialHandshake;
this.secureRenegotiation = secureRenegotiation;
this.clientVerifyData = clientVerifyData;
this.serverVerifyData = serverVerifyData;
enableNewSession = true;
invalidated = false;
setCipherSuite(CipherSuite.C_NULL);
setEnabledProtocols(enabledProtocols);
if (conn != null) {
algorithmConstraints = new SSLAlgorithmConstraints(conn, true);
} else { // engine != null
algorithmConstraints = new SSLAlgorithmConstraints(engine, true);
}
//
// In addition to the connection state machine, controlling
// how the connection deals with the different sorts of records
// that get sent (notably handshake transitions!), there's
// also a handshaking state machine that controls message
// sequencing.
//
// It's a convenient artifact of the protocol that this can,
// with only a couple of minor exceptions, be driven by the
// type constant for the last message seen: except for the
// client's cert verify, those constants are in a convenient
// order to drastically simplify state machine checking.
//
state = -2; // initialized but not activated
}
/*
* Reroutes calls to the SSLSocket or SSLEngine (*SE).
*
* We could have also done it by extra classes
* and letting them override, but this seemed much
* less involved.
*/
void fatalSE(byte b, String diagnostic) throws IOException {
fatalSE(b, diagnostic, null);
}
void fatalSE(byte b, Throwable cause) throws IOException {
fatalSE(b, null, cause);
}
void fatalSE(byte b, String diagnostic, Throwable cause) throws IOException {
if (conn != null) {
conn.fatal(b, diagnostic, cause);
} else {
engine.fatal(b, diagnostic, cause);
}
}
void warningSE(byte b) {
if (conn != null) {
conn.warning(b);
} else {
engine.warning(b);
}
}
String getRawHostnameSE() {
if (conn != null) {
return conn.getRawHostname();
} else {
return engine.getPeerHost();
}
}
String getHostSE() {
if (conn != null) {
return conn.getHost();
} else {
return engine.getPeerHost();
}
}
String getHostAddressSE() {
if (conn != null) {
return conn.getInetAddress().getHostAddress();
} else {
/*
* This is for caching only, doesn't matter that's is really
* a hostname. The main thing is that it doesn't do
* a reverse DNS lookup, potentially slowing things down.
*/
return engine.getPeerHost();
}
}
boolean isLoopbackSE() {
if (conn != null) {
return conn.getInetAddress().isLoopbackAddress();
} else {
return false;
}
}
int getPortSE() {
if (conn != null) {
return conn.getPort();
} else {
return engine.getPeerPort();
}
}
int getLocalPortSE() {
if (conn != null) {
return conn.getLocalPort();
} else {
return -1;
}
}
AccessControlContext getAccSE() {
if (conn != null) {
return conn.getAcc();
} else {
return engine.getAcc();
}
}
private void setVersionSE(ProtocolVersion protocolVersion) {
if (conn != null) {
conn.setVersion(protocolVersion);
} else {
engine.setVersion(protocolVersion);
}
}
/**
* Set the active protocol version and propagate it to the SSLSocket and our handshake streams.
* Called from ClientHandshaker and ServerHandshaker with the negotiated protocol version.
*/
void setVersion(ProtocolVersion protocolVersion) {
this.protocolVersion = protocolVersion;
setVersionSE(protocolVersion);
output.r.setVersion(protocolVersion);
}
/**
* Set the enabled protocols. Called from the constructor or
* SSLSocketImpl/SSLEngineImpl.setEnabledProtocols() (if the handshake is not yet in progress).
*/
void setEnabledProtocols(ProtocolList enabledProtocols) {
activeCipherSuites = null;
activeProtocols = null;
this.enabledProtocols = enabledProtocols;
}
/**
* Set the enabled cipher suites. Called from SSLSocketImpl/SSLEngineImpl.setEnabledCipherSuites()
* (if the handshake is not yet in progress).
*/
void setEnabledCipherSuites(CipherSuiteList enabledCipherSuites) {
activeCipherSuites = null;
activeProtocols = null;
this.enabledCipherSuites = enabledCipherSuites;
}
/**
* Set the algorithm constraints. Called from the constructor or
* SSLSocketImpl/SSLEngineImpl.setAlgorithmConstraints() (if the handshake is not yet in
* progress).
*/
void setAlgorithmConstraints(AlgorithmConstraints algorithmConstraints) {
activeCipherSuites = null;
activeProtocols = null;
this.algorithmConstraints = new SSLAlgorithmConstraints(algorithmConstraints);
this.localSupportedSignAlgs = null;
}
Collection<SignatureAndHashAlgorithm> getLocalSupportedSignAlgs() {
if (localSupportedSignAlgs == null) {
localSupportedSignAlgs =
SignatureAndHashAlgorithm.getSupportedAlgorithms(algorithmConstraints);
}
return localSupportedSignAlgs;
}
void setPeerSupportedSignAlgs(Collection<SignatureAndHashAlgorithm> algorithms) {
peerSupportedSignAlgs = new ArrayList<SignatureAndHashAlgorithm>(algorithms);
}
Collection<SignatureAndHashAlgorithm> getPeerSupportedSignAlgs() {
return peerSupportedSignAlgs;
}
/**
* Set the identification protocol. Called from the constructor or
* SSLSocketImpl/SSLEngineImpl.setIdentificationProtocol() (if the handshake is not yet in
* progress).
*/
void setIdentificationProtocol(String protocol) {
this.identificationProtocol = protocol;
}
/**
* Prior to handshaking, activate the handshake and initialize the version, input stream and
* output stream.
*/
void activate(ProtocolVersion helloVersion) throws IOException {
if (activeProtocols == null) {
activeProtocols = getActiveProtocols();
}
if (activeProtocols.collection().isEmpty() || activeProtocols.max.v == ProtocolVersion.NONE.v) {
throw new SSLHandshakeException("No appropriate protocol");
}
if (activeCipherSuites == null) {
activeCipherSuites = getActiveCipherSuites();
}
if (activeCipherSuites.collection().isEmpty()) {
throw new SSLHandshakeException("No appropriate cipher suite");
}
// temporary protocol version until the actual protocol version
// is negotiated in the Hello exchange. This affects the record
// version we sent with the ClientHello.
if (!isInitialHandshake) {
protocolVersion = activeProtocolVersion;
} else {
protocolVersion = activeProtocols.max;
}
if (helloVersion == null || helloVersion.v == ProtocolVersion.NONE.v) {
helloVersion = activeProtocols.helloVersion;
}
// We accumulate digests of the handshake messages so that
// we can read/write CertificateVerify and Finished messages,
// getting assurance against some particular active attacks.
Set<String> localSupportedHashAlgorithms =
SignatureAndHashAlgorithm.getHashAlgorithmNames(getLocalSupportedSignAlgs());
handshakeHash = new HandshakeHash(!isClient, needCertVerify, localSupportedHashAlgorithms);
// Generate handshake input/output stream.
input = new HandshakeInStream(handshakeHash);
if (conn != null) {
output = new HandshakeOutStream(protocolVersion, helloVersion, handshakeHash, conn);
conn.getAppInputStream().r.setHandshakeHash(handshakeHash);
conn.getAppInputStream().r.setHelloVersion(helloVersion);
conn.getAppOutputStream().r.setHelloVersion(helloVersion);
} else {
output = new HandshakeOutStream(protocolVersion, helloVersion, handshakeHash, engine);
engine.inputRecord.setHandshakeHash(handshakeHash);
engine.inputRecord.setHelloVersion(helloVersion);
engine.outputRecord.setHelloVersion(helloVersion);
}
// move state to activated
state = -1;
}
/**
* Set cipherSuite and keyExchange to the given CipherSuite. Does not perform any verification
* that this is a valid selection, this must be done before calling this method.
*/
void setCipherSuite(CipherSuite s) {
this.cipherSuite = s;
this.keyExchange = s.keyExchange;
}
/**
* Check if the given ciphersuite is enabled and available. Does not check if the required server
* certificates are available.
*/
boolean isNegotiable(CipherSuite s) {
if (activeCipherSuites == null) {
activeCipherSuites = getActiveCipherSuites();
}
return activeCipherSuites.contains(s) && s.isNegotiable();
}
/** Check if the given protocol version is enabled and available. */
boolean isNegotiable(ProtocolVersion protocolVersion) {
if (activeProtocols == null) {
activeProtocols = getActiveProtocols();
}
return activeProtocols.contains(protocolVersion);
}
/**
* Select a protocol version from the list. Called from ServerHandshaker to negotiate protocol
* version.
*
* <p>Return the lower of the protocol version suggested in the clien hello and the highest
* supported by the server.
*/
ProtocolVersion selectProtocolVersion(ProtocolVersion protocolVersion) {
if (activeProtocols == null) {
activeProtocols = getActiveProtocols();
}
return activeProtocols.selectProtocolVersion(protocolVersion);
}
/**
* Get the active cipher suites.
*
* <p>In TLS 1.1, many weak or vulnerable cipher suites were obsoleted, such as
* TLS_RSA_EXPORT_WITH_RC4_40_MD5. The implementation MUST NOT negotiate these cipher suites in
* TLS 1.1 or later mode.
*
* <p>Therefore, when the active protocols only include TLS 1.1 or later, the client cannot
* request to negotiate those obsoleted cipher suites. That is, the obsoleted suites should not be
* included in the client hello. So we need to create a subset of the enabled cipher suites, the
* active cipher suites, which does not contain obsoleted cipher suites of the minimum active
* protocol.
*
* <p>Return empty list instead of null if no active cipher suites.
*/
CipherSuiteList getActiveCipherSuites() {
if (activeCipherSuites == null) {
if (activeProtocols == null) {
activeProtocols = getActiveProtocols();
}
ArrayList<CipherSuite> suites = new ArrayList<>();
if (!(activeProtocols.collection().isEmpty())
&& activeProtocols.min.v != ProtocolVersion.NONE.v) {
for (CipherSuite suite : enabledCipherSuites.collection()) {
if (suite.obsoleted > activeProtocols.min.v && suite.supported <= activeProtocols.max.v) {
if (algorithmConstraints.permits(
EnumSet.of(CryptoPrimitive.KEY_AGREEMENT), suite.name, null)) {
suites.add(suite);
}
} else if (debug != null && Debug.isOn("verbose")) {
if (suite.obsoleted <= activeProtocols.min.v) {
System.out.println("Ignoring obsoleted cipher suite: " + suite);
} else {
System.out.println("Ignoring unsupported cipher suite: " + suite);
}
}
}
}
activeCipherSuites = new CipherSuiteList(suites);
}
return activeCipherSuites;
}
/*
* Get the active protocol versions.
*
* In TLS 1.1, many weak or vulnerable cipher suites were obsoleted,
* such as TLS_RSA_EXPORT_WITH_RC4_40_MD5. The implementation MUST NOT
* negotiate these cipher suites in TLS 1.1 or later mode.
*
* For example, if "TLS_RSA_EXPORT_WITH_RC4_40_MD5" is the
* only enabled cipher suite, the client cannot request TLS 1.1 or
* later, even though TLS 1.1 or later is enabled. We need to create a
* subset of the enabled protocols, called the active protocols, which
* contains protocols appropriate to the list of enabled Ciphersuites.
*
* Return empty list instead of null if no active protocol versions.
*/
ProtocolList getActiveProtocols() {
if (activeProtocols == null) {
ArrayList<ProtocolVersion> protocols = new ArrayList<>(4);
for (ProtocolVersion protocol : enabledProtocols.collection()) {
boolean found = false;
for (CipherSuite suite : enabledCipherSuites.collection()) {
if (suite.isAvailable()
&& suite.obsoleted > protocol.v
&& suite.supported <= protocol.v) {
if (algorithmConstraints.permits(
EnumSet.of(CryptoPrimitive.KEY_AGREEMENT), suite.name, null)) {
protocols.add(protocol);
found = true;
break;
} else if (debug != null && Debug.isOn("verbose")) {
System.out.println("Ignoring disabled cipher suite: " + suite + " for " + protocol);
}
} else if (debug != null && Debug.isOn("verbose")) {
System.out.println("Ignoring unsupported cipher suite: " + suite + " for " + protocol);
}
}
if (!found && (debug != null) && Debug.isOn("handshake")) {
System.out.println("No available cipher suite for " + protocol);
}
}
activeProtocols = new ProtocolList(protocols);
}
return activeProtocols;
}
/**
* As long as handshaking has not activated, we can change whether session creations are allowed.
*
* <p>Callers should do their own checking if handshaking has activated.
*/
void setEnableSessionCreation(boolean newSessions) {
enableNewSession = newSessions;
}
/** Create a new read cipher and return it to caller. */
CipherBox newReadCipher() throws NoSuchAlgorithmException {
BulkCipher cipher = cipherSuite.cipher;
CipherBox box;
if (isClient) {
box =
cipher.newCipher(
protocolVersion, svrWriteKey, svrWriteIV, sslContext.getSecureRandom(), false);
svrWriteKey = null;
svrWriteIV = null;
} else {
box =
cipher.newCipher(
protocolVersion, clntWriteKey, clntWriteIV, sslContext.getSecureRandom(), false);
clntWriteKey = null;
clntWriteIV = null;
}
return box;
}
/** Create a new write cipher and return it to caller. */
CipherBox newWriteCipher() throws NoSuchAlgorithmException {
BulkCipher cipher = cipherSuite.cipher;
CipherBox box;
if (isClient) {
box =
cipher.newCipher(
protocolVersion, clntWriteKey, clntWriteIV, sslContext.getSecureRandom(), true);
clntWriteKey = null;
clntWriteIV = null;
} else {
box =
cipher.newCipher(
protocolVersion, svrWriteKey, svrWriteIV, sslContext.getSecureRandom(), true);
svrWriteKey = null;
svrWriteIV = null;
}
return box;
}
/** Create a new read MAC and return it to caller. */
MAC newReadMAC() throws NoSuchAlgorithmException, InvalidKeyException {
MacAlg macAlg = cipherSuite.macAlg;
MAC mac;
if (isClient) {
mac = macAlg.newMac(protocolVersion, svrMacSecret);
svrMacSecret = null;
} else {
mac = macAlg.newMac(protocolVersion, clntMacSecret);
clntMacSecret = null;
}
return mac;
}
/** Create a new write MAC and return it to caller. */
MAC newWriteMAC() throws NoSuchAlgorithmException, InvalidKeyException {
MacAlg macAlg = cipherSuite.macAlg;
MAC mac;
if (isClient) {
mac = macAlg.newMac(protocolVersion, clntMacSecret);
clntMacSecret = null;
} else {
mac = macAlg.newMac(protocolVersion, svrMacSecret);
svrMacSecret = null;
}
return mac;
}
/*
* Returns true iff the handshake sequence is done, so that
* this freshly created session can become the current one.
*/
boolean isDone() {
return state == HandshakeMessage.ht_finished;
}
/*
* Returns the session which was created through this
* handshake sequence ... should be called after isDone()
* returns true.
*/
SSLSessionImpl getSession() {
return session;
}
/*
* Set the handshake session
*/
void setHandshakeSessionSE(SSLSessionImpl handshakeSession) {
if (conn != null) {
conn.setHandshakeSession(handshakeSession);
} else {
engine.setHandshakeSession(handshakeSession);
}
}
/*
* Returns true if renegotiation is in use for this connection.
*/
boolean isSecureRenegotiation() {
return secureRenegotiation;
}
/*
* Returns the verify_data from the Finished message sent by the client.
*/
byte[] getClientVerifyData() {
return clientVerifyData;
}
/*
* Returns the verify_data from the Finished message sent by the server.
*/
byte[] getServerVerifyData() {
return serverVerifyData;
}
/*
* This routine is fed SSL handshake records when they become available,
* and processes messages found therein.
*/
void process_record(InputRecord r, boolean expectingFinished) throws IOException {
checkThrown();
/*
* Store the incoming handshake data, then see if we can
* now process any completed handshake messages
*/
input.incomingRecord(r);
/*
* We don't need to create a separate delegatable task
* for finished messages.
*/
if ((conn != null) || expectingFinished) {
processLoop();
} else {
delegateTask(
new PrivilegedExceptionAction<Void>() {
public Void run() throws Exception {
processLoop();
return null;
}
});
}
}
/*
* On input, we hash messages one at a time since servers may need
* to access an intermediate hash to validate a CertificateVerify
* message.
*
* Note that many handshake messages can come in one record (and often
* do, to reduce network resource utilization), and one message can also
* require multiple records (e.g. very large Certificate messages).
*/
void processLoop() throws IOException {
// need to read off 4 bytes at least to get the handshake
// message type and length.
while (input.available() >= 4) {
byte messageType;
int messageLen;
/*
* See if we can read the handshake message header, and
* then the entire handshake message. If not, wait till
* we can read and process an entire message.
*/
input.mark(4);
messageType = (byte) input.getInt8();
messageLen = input.getInt24();
if (input.available() < messageLen) {
input.reset();
return;
}
/*
* Process the messsage. We require
* that processMessage() consumes the entire message. In
* lieu of explicit error checks (how?!) we assume that the
* data will look like garbage on encoding/processing errors,
* and that other protocol code will detect such errors.
*
* Note that digesting is normally deferred till after the
* message has been processed, though to process at least the
* client's Finished message (i.e. send the server's) we need
* to acccelerate that digesting.
*
* Also, note that hello request messages are never hashed;
* that includes the hello request header, too.
*/
if (messageType == HandshakeMessage.ht_hello_request) {
input.reset();
processMessage(messageType, messageLen);
input.ignore(4 + messageLen);
} else {
input.mark(messageLen);
processMessage(messageType, messageLen);
input.digestNow();
}
}
}
/**
* Returns true iff the handshaker has been activated.
*
* <p>In activated state, the handshaker may not send any messages out.
*/
boolean activated() {
return state >= -1;
}
/** Returns true iff the handshaker has sent any messages. */
boolean started() {
return state >= 0; // 0: HandshakeMessage.ht_hello_request
// 1: HandshakeMessage.ht_client_hello
}
/*
* Used to kickstart the negotiation ... either writing a
* ClientHello or a HelloRequest as appropriate, whichever
* the subclass returns. NOP if handshaking's already started.
*/
void kickstart() throws IOException {
if (state >= 0) {
return;
}
HandshakeMessage m = getKickstartMessage();
if (debug != null && Debug.isOn("handshake")) {
m.print(System.out);
}
m.write(output);
output.flush();
state = m.messageType();
}
/**
* Both client and server modes can start handshaking; but the message they send to do so is
* different.
*/
abstract HandshakeMessage getKickstartMessage() throws SSLException;
/*
* Client and Server side protocols are each driven though this
* call, which processes a single message and drives the appropriate
* side of the protocol state machine (depending on the subclass).
*/
abstract void processMessage(byte messageType, int messageLen) throws IOException;
/*
* Most alerts in the protocol relate to handshaking problems.
* Alerts are detected as the connection reads data.
*/
abstract void handshakeAlert(byte description) throws SSLProtocolException;
/*
* Sends a change cipher spec message and updates the write side
* cipher state so that future messages use the just-negotiated spec.
*/
void sendChangeCipherSpec(Finished mesg, boolean lastMessage) throws IOException {
output.flush(); // i.e. handshake data
/*
* The write cipher state is protected by the connection write lock
* so we must grab it while making the change. We also
* make sure no writes occur between sending the ChangeCipherSpec
* message, installing the new cipher state, and sending the
* Finished message.
*
* We already hold SSLEngine/SSLSocket "this" by virtue
* of this being called from the readRecord code.
*/
OutputRecord r;
if (conn != null) {
r = new OutputRecord(Record.ct_change_cipher_spec);
} else {
r = new EngineOutputRecord(Record.ct_change_cipher_spec, engine);
}
r.setVersion(protocolVersion);
r.write(1); // single byte of data
if (conn != null) {
conn.writeLock.lock();
try {
conn.writeRecord(r);
conn.changeWriteCiphers();
if (debug != null && Debug.isOn("handshake")) {
mesg.print(System.out);
}
mesg.write(output);
output.flush();
} finally {
conn.writeLock.unlock();
}
} else {
synchronized (engine.writeLock) {
engine.writeRecord((EngineOutputRecord) r);
engine.changeWriteCiphers();
if (debug != null && Debug.isOn("handshake")) {
mesg.print(System.out);
}
mesg.write(output);
if (lastMessage) {
output.setFinishedMsg();
}
output.flush();
}
}
}
/*
* Single access point to key calculation logic. Given the
* pre-master secret and the nonces from client and server,
* produce all the keying material to be used.
*/
void calculateKeys(SecretKey preMasterSecret, ProtocolVersion version) {
SecretKey master = calculateMasterSecret(preMasterSecret, version);
session.setMasterSecret(master);
calculateConnectionKeys(master);
}
/*
* Calculate the master secret from its various components. This is
* used for key exchange by all cipher suites.
*
* The master secret is the catenation of three MD5 hashes, each
* consisting of the pre-master secret and a SHA1 hash. Those three
* SHA1 hashes are of (different) constant strings, the pre-master
* secret, and the nonces provided by the client and the server.
*/
private SecretKey calculateMasterSecret(
SecretKey preMasterSecret, ProtocolVersion requestedVersion) {
if (debug != null && Debug.isOn("keygen")) {
HexDumpEncoder dump = new HexDumpEncoder();
System.out.println("SESSION KEYGEN:");
System.out.println("PreMaster Secret:");
printHex(dump, preMasterSecret.getEncoded());
// Nonces are dumped with connection keygen, no
// benefit to doing it twice
}
// What algs/params do we need to use?
String masterAlg;
PRF prf;
if (protocolVersion.v >= ProtocolVersion.TLS12.v) {
masterAlg = "SunTls12MasterSecret";
prf = cipherSuite.prfAlg;
} else {
masterAlg = "SunTlsMasterSecret";
prf = P_NONE;
}
String prfHashAlg = prf.getPRFHashAlg();
int prfHashLength = prf.getPRFHashLength();
int prfBlockSize = prf.getPRFBlockSize();
TlsMasterSecretParameterSpec spec =
new TlsMasterSecretParameterSpec(
preMasterSecret,
protocolVersion.major,
protocolVersion.minor,
clnt_random.random_bytes,
svr_random.random_bytes,
prfHashAlg,
prfHashLength,
prfBlockSize);
SecretKey masterSecret;
try {
KeyGenerator kg = JsseJce.getKeyGenerator(masterAlg);
kg.init(spec);
masterSecret = kg.generateKey();
} catch (GeneralSecurityException e) {
// For RSA premaster secrets, do not signal a protocol error
// due to the Bleichenbacher attack. See comments further down.
if (!preMasterSecret.getAlgorithm().equals("TlsRsaPremasterSecret")) {
throw new ProviderException(e);
}
if (debug != null && Debug.isOn("handshake")) {
System.out.println("RSA master secret generation error:");
e.printStackTrace(System.out);
System.out.println("Generating new random premaster secret");
}
if (requestedVersion != null) {
preMasterSecret = RSAClientKeyExchange.generateDummySecret(requestedVersion);
} else {
preMasterSecret = RSAClientKeyExchange.generateDummySecret(protocolVersion);
}
// recursive call with new premaster secret
return calculateMasterSecret(preMasterSecret, null);
}
// if no version check requested (client side handshake), or version
// information is not available (not an RSA premaster secret),
// return master secret immediately.
if ((requestedVersion == null) || !(masterSecret instanceof TlsMasterSecret)) {
return masterSecret;
}
// we have checked the ClientKeyExchange message when reading TLS
// record, the following check is necessary to ensure that
// JCE provider does not ignore the checking, or the previous
// checking process bypassed the premaster secret version checking.
TlsMasterSecret tlsKey = (TlsMasterSecret) masterSecret;
int major = tlsKey.getMajorVersion();
int minor = tlsKey.getMinorVersion();
if ((major < 0) || (minor < 0)) {
return masterSecret;
}
// check if the premaster secret version is ok
// the specification says that it must be the maximum version supported
// by the client from its ClientHello message. However, many
// implementations send the negotiated version, so accept both
// for SSL v3.0 and TLS v1.0.
// NOTE that we may be comparing two unsupported version numbers, which
// is why we cannot use object reference equality in this special case.
ProtocolVersion premasterVersion = ProtocolVersion.valueOf(major, minor);
boolean versionMismatch = (premasterVersion.v != requestedVersion.v);
/*
* we never checked the client_version in server side
* for TLS v1.0 and SSL v3.0. For compatibility, we
* maintain this behavior.
*/
if (versionMismatch && requestedVersion.v <= ProtocolVersion.TLS10.v) {
versionMismatch = (premasterVersion.v != protocolVersion.v);
}
if (versionMismatch == false) {
// check passed, return key
return masterSecret;
}
// Due to the Bleichenbacher attack, do not signal a protocol error.
// Generate a random premaster secret and continue with the handshake,
// which will fail when verifying the finished messages.
// For more information, see comments in PreMasterSecret.
if (debug != null && Debug.isOn("handshake")) {
System.out.println(
"RSA PreMasterSecret version error: expected"
+ protocolVersion
+ " or "
+ requestedVersion
+ ", decrypted: "
+ premasterVersion);
System.out.println("Generating new random premaster secret");
}
preMasterSecret = RSAClientKeyExchange.generateDummySecret(requestedVersion);
// recursive call with new premaster secret
return calculateMasterSecret(preMasterSecret, null);
}
/*
* Calculate the keys needed for this connection, once the session's
* master secret has been calculated. Uses the master key and nonces;
* the amount of keying material generated is a function of the cipher
* suite that's been negotiated.
*
* This gets called both on the "full handshake" (where we exchanged
* a premaster secret and started a new session) as well as on the
* "fast handshake" (where we just resumed a pre-existing session).
*/
void calculateConnectionKeys(SecretKey masterKey) {
/*
* For both the read and write sides of the protocol, we use the
* master to generate MAC secrets and cipher keying material. Block
* ciphers need initialization vectors, which we also generate.
*
* First we figure out how much keying material is needed.
*/
int hashSize = cipherSuite.macAlg.size;
boolean is_exportable = cipherSuite.exportable;
BulkCipher cipher = cipherSuite.cipher;
int expandedKeySize = is_exportable ? cipher.expandedKeySize : 0;
// Which algs/params do we need to use?
String keyMaterialAlg;
PRF prf;
if (protocolVersion.v >= ProtocolVersion.TLS12.v) {
keyMaterialAlg = "SunTls12KeyMaterial";
prf = cipherSuite.prfAlg;
} else {
keyMaterialAlg = "SunTlsKeyMaterial";
prf = P_NONE;
}
String prfHashAlg = prf.getPRFHashAlg();
int prfHashLength = prf.getPRFHashLength();
int prfBlockSize = prf.getPRFBlockSize();
TlsKeyMaterialParameterSpec spec =
new TlsKeyMaterialParameterSpec(
masterKey,
protocolVersion.major,
protocolVersion.minor,
clnt_random.random_bytes,
svr_random.random_bytes,
cipher.algorithm,
cipher.keySize,
expandedKeySize,
cipher.ivSize,
hashSize,
prfHashAlg,
prfHashLength,
prfBlockSize);
try {
KeyGenerator kg = JsseJce.getKeyGenerator(keyMaterialAlg);
kg.init(spec);
TlsKeyMaterialSpec keySpec = (TlsKeyMaterialSpec) kg.generateKey();
clntWriteKey = keySpec.getClientCipherKey();
svrWriteKey = keySpec.getServerCipherKey();
// Return null if IVs are not supposed to be generated.
// e.g. TLS 1.1+.
clntWriteIV = keySpec.getClientIv();
svrWriteIV = keySpec.getServerIv();
clntMacSecret = keySpec.getClientMacKey();
svrMacSecret = keySpec.getServerMacKey();
} catch (GeneralSecurityException e) {
throw new ProviderException(e);
}
//
// Dump the connection keys as they're generated.
//
if (debug != null && Debug.isOn("keygen")) {
synchronized (System.out) {
HexDumpEncoder dump = new HexDumpEncoder();
System.out.println("CONNECTION KEYGEN:");
// Inputs:
System.out.println("Client Nonce:");
printHex(dump, clnt_random.random_bytes);
System.out.println("Server Nonce:");
printHex(dump, svr_random.random_bytes);
System.out.println("Master Secret:");
printHex(dump, masterKey.getEncoded());
// Outputs:
System.out.println("Client MAC write Secret:");
printHex(dump, clntMacSecret.getEncoded());
System.out.println("Server MAC write Secret:");
printHex(dump, svrMacSecret.getEncoded());
if (clntWriteKey != null) {
System.out.println("Client write key:");
printHex(dump, clntWriteKey.getEncoded());
System.out.println("Server write key:");
printHex(dump, svrWriteKey.getEncoded());
} else {
System.out.println("... no encryption keys used");
}
if (clntWriteIV != null) {
System.out.println("Client write IV:");
printHex(dump, clntWriteIV.getIV());
System.out.println("Server write IV:");
printHex(dump, svrWriteIV.getIV());
} else {
if (protocolVersion.v >= ProtocolVersion.TLS11.v) {
System.out.println("... no IV derived for this protocol");
} else {
System.out.println("... no IV used for this cipher");
}
}
System.out.flush();
}
}
}
private static void printHex(HexDumpEncoder dump, byte[] bytes) {
if (bytes == null) {
System.out.println("(key bytes not available)");
} else {
try {
dump.encodeBuffer(bytes, System.out);
} catch (IOException e) {
// just for debugging, ignore this
}
}
}
/**
* Throw an SSLException with the specified message and cause. Shorthand until a new SSLException
* constructor is added. This method never returns.
*/
static void throwSSLException(String msg, Throwable cause) throws SSLException {
SSLException e = new SSLException(msg);
e.initCause(cause);
throw e;
}
/*
* Implement a simple task delegator.
*
* We are currently implementing this as a single delegator, may
* try for parallel tasks later. Client Authentication could
* benefit from this, where ClientKeyExchange/CertificateVerify
* could be carried out in parallel.
*/
class DelegatedTask<E> implements Runnable {
private PrivilegedExceptionAction<E> pea;
DelegatedTask(PrivilegedExceptionAction<E> pea) {
this.pea = pea;
}
public void run() {
synchronized (engine) {
try {
AccessController.doPrivileged(pea, engine.getAcc());
} catch (PrivilegedActionException pae) {
thrown = pae.getException();
} catch (RuntimeException rte) {
thrown = rte;
}
delegatedTask = null;
taskDelegated = false;
}
}
}
private <T> void delegateTask(PrivilegedExceptionAction<T> pea) {
delegatedTask = new DelegatedTask<T>(pea);
taskDelegated = false;
thrown = null;
}
DelegatedTask getTask() {
if (!taskDelegated) {
taskDelegated = true;
return delegatedTask;
} else {
return null;
}
}
/*
* See if there are any tasks which need to be delegated
*
* Locked by SSLEngine.this.
*/
boolean taskOutstanding() {
return (delegatedTask != null);
}
/*
* The previous caller failed for some reason, report back the
* Exception. We won't worry about Error's.
*
* Locked by SSLEngine.this.
*/
void checkThrown() throws SSLException {
synchronized (thrownLock) {
if (thrown != null) {
String msg = thrown.getMessage();
if (msg == null) {
msg = "Delegated task threw Exception/Error";
}
/*
* See what the underlying type of exception is. We should
* throw the same thing. Chain thrown to the new exception.
*/
Exception e = thrown;
thrown = null;
if (e instanceof RuntimeException) {
throw (RuntimeException) new RuntimeException(msg).initCause(e);
} else if (e instanceof SSLHandshakeException) {
throw (SSLHandshakeException) new SSLHandshakeException(msg).initCause(e);
} else if (e instanceof SSLKeyException) {
throw (SSLKeyException) new SSLKeyException(msg).initCause(e);
} else if (e instanceof SSLPeerUnverifiedException) {
throw (SSLPeerUnverifiedException) new SSLPeerUnverifiedException(msg).initCause(e);
} else if (e instanceof SSLProtocolException) {
throw (SSLProtocolException) new SSLProtocolException(msg).initCause(e);
} else {
/*
* If it's SSLException or any other Exception,
* we'll wrap it in an SSLException.
*/
throw (SSLException) new SSLException(msg).initCause(e);
}
}
}
}
}
public void runSupport() {
try {
new URL(url_str); // determine if this is already a proper URL
} catch (Throwable t) { // it's not
// //check if the string is just a base32/hex-encoded torrent infohash
//
// String magnet_uri = UrlUtils.normaliseMagnetURI( url_str );
//
// if ( magnet_uri != null ){
//
// url_str = magnet_uri;
// }
}
try {
url = AddressUtils.adjustURL(new URL(url_str));
String protocol = url.getProtocol().toLowerCase();
// hack here - the magnet download process requires an additional paramter to cause it to
// stall on error so the error can be reported
// if ( protocol.equals( "magnet" ) || protocol.equals( "dht" )){
//
// url = AddressUtils.adjustURL( new URL(url_str+"&pause_on_error=true"));
// }
for (int i = 0; i < 2; i++) {
try {
// if ( protocol.equals("https")){
//
// // see ConfigurationChecker for SSL client defaults
//
// HttpsURLConnection ssl_con = (HttpsURLConnection)url.openConnection();
//
// // allow for certs that contain IP addresses rather than dns names
//
// ssl_con.setHostnameVerifier(
// new HostnameVerifier()
// {
// public boolean
// verify(
// String host,
// SSLSession session )
// {
// return( true );
// }
// });
//
// con = ssl_con;
//
// }else{
//
con = (HttpURLConnection) url.openConnection();
// }
con.setRequestProperty(
"User-Agent", Constants.AZUREUS_NAME + " " + Constants.AZUREUS_VERSION);
if (referrer != null && referrer.length() > 0) {
con.setRequestProperty("Referer", referrer);
}
if (request_properties != null) {
Iterator it = request_properties.entrySet().iterator();
while (it.hasNext()) {
Map.Entry entry = (Map.Entry) it.next();
String key = (String) entry.getKey();
String value = (String) entry.getValue();
// currently this code doesn't support gzip/deflate...
if (!key.equalsIgnoreCase("Accept-Encoding")) {
con.setRequestProperty(key, value);
}
}
}
this.con.connect();
break;
// }catch( SSLException e ){
//
// if ( i == 0 ){
//
// if ( SESecurityManager.installServerCertificates( url ) != null ){
//
// // certificate has been installed
//
// continue; // retry with new certificate
// }
// }
//
// throw( e );
//
} catch (IOException e) {
if (i == 0) {
URL retry_url = UrlUtils.getIPV4Fallback(url);
if (retry_url != null) {
url = retry_url;
} else {
throw (e);
}
}
}
}
int response = this.con.getResponseCode();
if (!ignoreReponseCode) {
if ((response != HttpURLConnection.HTTP_ACCEPTED)
&& (response != HttpURLConnection.HTTP_OK)) {
this.error(response, Integer.toString(response) + ": " + this.con.getResponseMessage());
return;
}
}
/*
Map headerFields = this.con.getHeaderFields();
System.out.println("Header of download of " + url_str);
for (Iterator iter = headerFields.keySet().iterator(); iter.hasNext();) {
String s = (String) iter.next();
System.out.println(s + ":" + headerFields.get(s));
}
*/
filename = this.con.getHeaderField("Content-Disposition");
if ((filename != null)
&& filename
.toLowerCase()
.matches(".*attachment.*")) // Some code to handle b0rked servers.
while (filename.toLowerCase().charAt(0) != 'a') filename = filename.substring(1);
if ((filename == null)
|| !filename.toLowerCase().startsWith("attachment")
|| (filename.indexOf('=') == -1)) {
String tmp = this.url.getFile();
if (tmp.length() == 0 || tmp.equals("/")) {
filename = url.getHost();
} else if (tmp.startsWith("?")) {
// probably a magnet URI - use the hash
// magnet:?xt=urn:sha1:VGC53ZWCUXUWVGX7LQPVZIYF4L6RXSU6
String query = tmp.toUpperCase();
int pos = query.indexOf("XT=URN:SHA1:");
if (pos == -1) {
pos = query.indexOf("XT=URN:BTIH:");
}
if (pos != -1) {
pos += 12;
int p2 = query.indexOf("&", pos);
if (p2 == -1) {
filename = query.substring(pos);
} else {
filename = query.substring(pos, p2);
}
} else {
filename = "Torrent" + (long) (Math.random() * Long.MAX_VALUE);
}
filename += ".tmp";
} else {
if (tmp.lastIndexOf('/') != -1) tmp = tmp.substring(tmp.lastIndexOf('/') + 1);
// remove any params in the url
int param_pos = tmp.indexOf('?');
if (param_pos != -1) {
tmp = tmp.substring(0, param_pos);
}
filename = URLDecoder.decode(tmp, Constants.DEFAULT_ENCODING);
}
} else {
filename = filename.substring(filename.indexOf('=') + 1);
if (filename.startsWith("\"") && filename.endsWith("\""))
filename = filename.substring(1, filename.lastIndexOf('\"'));
filename = URLDecoder.decode(filename, Constants.DEFAULT_ENCODING);
// not sure of this piece of logic here but I'm not changing it at the moment
File temp = new File(filename);
filename = temp.getName();
}
filename = FileUtil.convertOSSpecificChars(filename, false);
// directoryname =
// COConfigurationManager.getDirectoryParameter("General_sDefaultTorrent_Directory");
// boolean useTorrentSave = COConfigurationManager.getBooleanParameter("Save Torrent
// Files");
directoryname = "D:\\Development\\testDownloads\\";
boolean useTorrentSave = true;
if (file_str != null) {
// not completely sure about the whole logic in this block
File temp = new File(file_str);
// if we're not using a default torrent save dir
if (!useTorrentSave || directoryname.length() == 0) {
// if it's already a dir
if (temp.isDirectory()) {
// use it
directoryname = temp.getCanonicalPath();
}
// it's a file
else {
// so use its parent dir
directoryname = temp.getCanonicalFile().getParent();
}
}
// if it's a file
if (!temp.isDirectory()) {
// set the file name
filename = temp.getName();
}
}
// what would happen here if directoryname == null and file_str == null??
this.state = STATE_INIT;
this.notifyListener();
} catch (java.net.MalformedURLException e) {
this.error(0, "Exception while parsing URL '" + url + "':" + e.getMessage());
} catch (java.net.UnknownHostException e) {
this.error(
0,
"Exception while initializing download of '"
+ url
+ "': Unknown Host '"
+ e.getMessage()
+ "'");
} catch (java.io.IOException ioe) {
this.error(0, "I/O Exception while initializing download of '" + url + "':" + ioe.toString());
} catch (Throwable e) {
this.error(0, "Exception while initializing download of '" + url + "':" + e.toString());
}
if (this.state == STATE_ERROR) {
return;
}
try {
final boolean status_reader_run[] = {true};
this.state = STATE_START;
notifyListener();
this.state = STATE_DOWNLOADING;
notifyListener();
Thread status_reader =
new AEThread("TorrentDownloader:statusreader") {
public void runSupport() {
boolean changed_status = false;
while (true) {
try {
Thread.sleep(100);
try {
this_mon.enter();
if (!status_reader_run[0]) {
break;
}
} finally {
this_mon.exit();
}
String s = con.getResponseMessage();
if (!s.equals(getStatus())) {
if (!s.toLowerCase().startsWith("error:")) {
if (s.toLowerCase().indexOf("alive") != -1) {
if (percentDone < 10) {
percentDone++;
}
}
int pos = s.indexOf('%');
if (pos != -1) {
int i;
for (i = pos - 1; i >= 0; i--) {
char c = s.charAt(i);
if (!Character.isDigit(c) && c != ' ') {
i++;
break;
}
}
try {
percentDone = Integer.parseInt(s.substring(i, pos).trim());
} catch (Throwable e) {
}
}
setStatus(s);
} else {
error(con.getResponseCode(), s.substring(6));
}
changed_status = true;
}
} catch (Throwable e) {
break;
}
}
if (changed_status) {
setStatus("");
}
}
};
status_reader.setDaemon(true);
status_reader.start();
InputStream in;
try {
in = this.con.getInputStream();
} catch (FileNotFoundException e) {
if (ignoreReponseCode) {
in = this.con.getErrorStream();
} else {
throw e;
}
} finally {
try {
this_mon.enter();
status_reader_run[0] = false;
} finally {
this_mon.exit();
}
}
// handle some servers that return gzip'd torrents even though we don't request it!
String encoding = con.getHeaderField("content-encoding");
if (encoding != null) {
if (encoding.equalsIgnoreCase("gzip")) {
in = new GZIPInputStream(in);
} else if (encoding.equalsIgnoreCase("deflate")) {
in = new InflaterInputStream(in);
}
}
if (this.state != STATE_ERROR) {
this.file = new File(this.directoryname, filename);
boolean useTempFile = false;
try {
this.file.createNewFile();
useTempFile = !this.file.exists();
} catch (Throwable t) {
useTempFile = true;
}
if (useTempFile) {
this.file = File.createTempFile("AZU", ".torrent", new File(this.directoryname));
this.file.createNewFile();
}
FileOutputStream fileout = new FileOutputStream(this.file, false);
bufBytes = 0;
int size = (int) UrlUtils.getContentLength(con);
this.percentDone = -1;
do {
if (this.cancel) {
break;
}
try {
bufBytes = in.read(buf);
this.readTotal += bufBytes;
if (size != 0) {
this.percentDone = (100 * this.readTotal) / size;
}
notifyListener();
} catch (IOException e) {
}
if (bufBytes > 0) {
fileout.write(buf, 0, bufBytes);
}
} while (bufBytes > 0);
in.close();
fileout.flush();
fileout.close();
if (this.cancel) {
this.state = STATE_CANCELLED;
if (deleteFileOnCancel) {
this.cleanUpFile();
}
} else {
if (this.readTotal <= 0) {
this.error(0, "No data contained in '" + this.url.toString() + "'");
return;
}
// if the file has come down with a not-so-useful name then we try to rename
// it to something more useful
try {
if (!filename.toLowerCase().endsWith(".torrent")) {
TOTorrent torrent = TorrentUtils.readFromFile(file, false);
String name = TorrentUtils.getLocalisedName(torrent) + ".torrent";
File new_file = new File(directoryname, name);
if (file.renameTo(new_file)) {
filename = name;
file = new_file;
}
}
} catch (Throwable e) {
Debug.printStackTrace(e);
}
// TorrentUtils.setObtainedFrom( file, original_url );
this.state = STATE_FINISHED;
}
this.notifyListener();
}
} catch (Exception e) {
if (!cancel) {
Debug.out("'" + this.directoryname + "' '" + filename + "'", e);
}
this.error(0, "Exception while downloading '" + this.url.toString() + "':" + e.getMessage());
}
}
public Socket createSocket(String host, int port)
throws IOException, FingerprintException, FingerprintError {
Socket s = new Socket();
s.connect(new InetSocketAddress(proxyHost, proxyPort), 1000 * timeout);
PrintWriter out = new PrintWriter(s.getOutputStream());
InputStreamReader isr = new InputStreamReader(s.getInputStream());
BufferedReader in = new BufferedReader(isr);
String[] connHdr = {
"CONNECT " + host + ":" + port + " HTTP/1.1",
"Host: " + host + ":" + port,
"Proxy-Connection: close"
};
String[] connReq = null;
if (authRequired) {
connReq = new String[connHdr.length + 1];
for (int i = 0; i < connHdr.length; i++) {
connReq[i] = connHdr[i];
}
connReq[connHdr.length] = "Proxy-Authorization: " + authenticator;
} else {
connReq = new String[connHdr.length];
for (int i = 0; i < connHdr.length; i++) {
connReq[i] = connHdr[i];
}
}
sendRequest(out, connReq);
HttpResponseHeader hdr = new HttpResponseHeader(in);
int status = hdr.getStatusCode();
if (Debug.get(Debug.Communication)) {
System.err.println("Got status " + status);
}
/* Now check the status code and act upon it */
if ((status / 100) == 2) { // Code is 2xx
return s;
}
if (((status / 100) == 4) && (status != 407)) {
throw new HttpProxyError("Proxy request failed");
}
if ((status == 407) && authRequired) {
/* We already sent authorisation info,
* but the proxy did not accept it.
* So we can only stop here, as
* we do not have the right credentials
* at hand.
*/
throw new HttpProxyError("Cannot authenticate " + "to proxy, wrong " + "credentials?");
}
if (status == 407) {
if (Debug.get(Debug.SockInit)) {
System.err.println("Preparing proxy " + "authenticator for " + hdr.getProxyAuthInfo());
}
prepareAuthorisation(hdr.getProxyAuthInfo());
authRequired = true;
return createSocket(host, port);
}
return s;
}
/*
* Calculate the keys needed for this connection, once the session's
* master secret has been calculated. Uses the master key and nonces;
* the amount of keying material generated is a function of the cipher
* suite that's been negotiated.
*
* This gets called both on the "full handshake" (where we exchanged
* a premaster secret and started a new session) as well as on the
* "fast handshake" (where we just resumed a pre-existing session).
*/
void calculateConnectionKeys(SecretKey masterKey) {
/*
* For both the read and write sides of the protocol, we use the
* master to generate MAC secrets and cipher keying material. Block
* ciphers need initialization vectors, which we also generate.
*
* First we figure out how much keying material is needed.
*/
int hashSize = cipherSuite.macAlg.size;
boolean is_exportable = cipherSuite.exportable;
BulkCipher cipher = cipherSuite.cipher;
int expandedKeySize = is_exportable ? cipher.expandedKeySize : 0;
// Which algs/params do we need to use?
String keyMaterialAlg;
PRF prf;
if (protocolVersion.v >= ProtocolVersion.TLS12.v) {
keyMaterialAlg = "SunTls12KeyMaterial";
prf = cipherSuite.prfAlg;
} else {
keyMaterialAlg = "SunTlsKeyMaterial";
prf = P_NONE;
}
String prfHashAlg = prf.getPRFHashAlg();
int prfHashLength = prf.getPRFHashLength();
int prfBlockSize = prf.getPRFBlockSize();
TlsKeyMaterialParameterSpec spec =
new TlsKeyMaterialParameterSpec(
masterKey,
protocolVersion.major,
protocolVersion.minor,
clnt_random.random_bytes,
svr_random.random_bytes,
cipher.algorithm,
cipher.keySize,
expandedKeySize,
cipher.ivSize,
hashSize,
prfHashAlg,
prfHashLength,
prfBlockSize);
try {
KeyGenerator kg = JsseJce.getKeyGenerator(keyMaterialAlg);
kg.init(spec);
TlsKeyMaterialSpec keySpec = (TlsKeyMaterialSpec) kg.generateKey();
clntWriteKey = keySpec.getClientCipherKey();
svrWriteKey = keySpec.getServerCipherKey();
// Return null if IVs are not supposed to be generated.
// e.g. TLS 1.1+.
clntWriteIV = keySpec.getClientIv();
svrWriteIV = keySpec.getServerIv();
clntMacSecret = keySpec.getClientMacKey();
svrMacSecret = keySpec.getServerMacKey();
} catch (GeneralSecurityException e) {
throw new ProviderException(e);
}
//
// Dump the connection keys as they're generated.
//
if (debug != null && Debug.isOn("keygen")) {
synchronized (System.out) {
HexDumpEncoder dump = new HexDumpEncoder();
System.out.println("CONNECTION KEYGEN:");
// Inputs:
System.out.println("Client Nonce:");
printHex(dump, clnt_random.random_bytes);
System.out.println("Server Nonce:");
printHex(dump, svr_random.random_bytes);
System.out.println("Master Secret:");
printHex(dump, masterKey.getEncoded());
// Outputs:
System.out.println("Client MAC write Secret:");
printHex(dump, clntMacSecret.getEncoded());
System.out.println("Server MAC write Secret:");
printHex(dump, svrMacSecret.getEncoded());
if (clntWriteKey != null) {
System.out.println("Client write key:");
printHex(dump, clntWriteKey.getEncoded());
System.out.println("Server write key:");
printHex(dump, svrWriteKey.getEncoded());
} else {
System.out.println("... no encryption keys used");
}
if (clntWriteIV != null) {
System.out.println("Client write IV:");
printHex(dump, clntWriteIV.getIV());
System.out.println("Server write IV:");
printHex(dump, svrWriteIV.getIV());
} else {
if (protocolVersion.v >= ProtocolVersion.TLS11.v) {
System.out.println("... no IV derived for this protocol");
} else {
System.out.println("... no IV used for this cipher");
}
}
System.out.flush();
}
}
}
/*
* Calculate the master secret from its various components. This is
* used for key exchange by all cipher suites.
*
* The master secret is the catenation of three MD5 hashes, each
* consisting of the pre-master secret and a SHA1 hash. Those three
* SHA1 hashes are of (different) constant strings, the pre-master
* secret, and the nonces provided by the client and the server.
*/
private SecretKey calculateMasterSecret(
SecretKey preMasterSecret, ProtocolVersion requestedVersion) {
if (debug != null && Debug.isOn("keygen")) {
HexDumpEncoder dump = new HexDumpEncoder();
System.out.println("SESSION KEYGEN:");
System.out.println("PreMaster Secret:");
printHex(dump, preMasterSecret.getEncoded());
// Nonces are dumped with connection keygen, no
// benefit to doing it twice
}
// What algs/params do we need to use?
String masterAlg;
PRF prf;
if (protocolVersion.v >= ProtocolVersion.TLS12.v) {
masterAlg = "SunTls12MasterSecret";
prf = cipherSuite.prfAlg;
} else {
masterAlg = "SunTlsMasterSecret";
prf = P_NONE;
}
String prfHashAlg = prf.getPRFHashAlg();
int prfHashLength = prf.getPRFHashLength();
int prfBlockSize = prf.getPRFBlockSize();
TlsMasterSecretParameterSpec spec =
new TlsMasterSecretParameterSpec(
preMasterSecret,
protocolVersion.major,
protocolVersion.minor,
clnt_random.random_bytes,
svr_random.random_bytes,
prfHashAlg,
prfHashLength,
prfBlockSize);
SecretKey masterSecret;
try {
KeyGenerator kg = JsseJce.getKeyGenerator(masterAlg);
kg.init(spec);
masterSecret = kg.generateKey();
} catch (GeneralSecurityException e) {
// For RSA premaster secrets, do not signal a protocol error
// due to the Bleichenbacher attack. See comments further down.
if (!preMasterSecret.getAlgorithm().equals("TlsRsaPremasterSecret")) {
throw new ProviderException(e);
}
if (debug != null && Debug.isOn("handshake")) {
System.out.println("RSA master secret generation error:");
e.printStackTrace(System.out);
System.out.println("Generating new random premaster secret");
}
if (requestedVersion != null) {
preMasterSecret = RSAClientKeyExchange.generateDummySecret(requestedVersion);
} else {
preMasterSecret = RSAClientKeyExchange.generateDummySecret(protocolVersion);
}
// recursive call with new premaster secret
return calculateMasterSecret(preMasterSecret, null);
}
// if no version check requested (client side handshake), or version
// information is not available (not an RSA premaster secret),
// return master secret immediately.
if ((requestedVersion == null) || !(masterSecret instanceof TlsMasterSecret)) {
return masterSecret;
}
// we have checked the ClientKeyExchange message when reading TLS
// record, the following check is necessary to ensure that
// JCE provider does not ignore the checking, or the previous
// checking process bypassed the premaster secret version checking.
TlsMasterSecret tlsKey = (TlsMasterSecret) masterSecret;
int major = tlsKey.getMajorVersion();
int minor = tlsKey.getMinorVersion();
if ((major < 0) || (minor < 0)) {
return masterSecret;
}
// check if the premaster secret version is ok
// the specification says that it must be the maximum version supported
// by the client from its ClientHello message. However, many
// implementations send the negotiated version, so accept both
// for SSL v3.0 and TLS v1.0.
// NOTE that we may be comparing two unsupported version numbers, which
// is why we cannot use object reference equality in this special case.
ProtocolVersion premasterVersion = ProtocolVersion.valueOf(major, minor);
boolean versionMismatch = (premasterVersion.v != requestedVersion.v);
/*
* we never checked the client_version in server side
* for TLS v1.0 and SSL v3.0. For compatibility, we
* maintain this behavior.
*/
if (versionMismatch && requestedVersion.v <= ProtocolVersion.TLS10.v) {
versionMismatch = (premasterVersion.v != protocolVersion.v);
}
if (versionMismatch == false) {
// check passed, return key
return masterSecret;
}
// Due to the Bleichenbacher attack, do not signal a protocol error.
// Generate a random premaster secret and continue with the handshake,
// which will fail when verifying the finished messages.
// For more information, see comments in PreMasterSecret.
if (debug != null && Debug.isOn("handshake")) {
System.out.println(
"RSA PreMasterSecret version error: expected"
+ protocolVersion
+ " or "
+ requestedVersion
+ ", decrypted: "
+ premasterVersion);
System.out.println("Generating new random premaster secret");
}
preMasterSecret = RSAClientKeyExchange.generateDummySecret(requestedVersion);
// recursive call with new premaster secret
return calculateMasterSecret(preMasterSecret, null);
}
