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A pure-java CIFS/SMB client library
/* jcifs smb client library in Java
* Copyright (C) 2005 "Michael B. Allen"
* "Eric Glass"
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
package jcifs.smb;
import java.io.EOFException;
import java.io.IOException;
import java.io.InputStream;
import java.io.InterruptedIOException;
import java.io.OutputStream;
import java.net.InetAddress;
import java.net.InetSocketAddress;
import java.net.Socket;
import java.net.SocketException;
import java.security.MessageDigest;
import java.util.Arrays;
import java.util.Collections;
import java.util.LinkedList;
import java.util.List;
import java.util.ListIterator;
import java.util.Locale;
import java.util.Set;
import java.util.concurrent.Semaphore;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicLong;
import javax.crypto.Cipher;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import jcifs.Address;
import jcifs.CIFSContext;
import jcifs.CIFSException;
import jcifs.DfsReferralData;
import jcifs.DialectVersion;
import jcifs.SmbConstants;
import jcifs.SmbTransport;
import jcifs.internal.CommonServerMessageBlock;
import jcifs.internal.CommonServerMessageBlockRequest;
import jcifs.internal.CommonServerMessageBlockResponse;
import jcifs.internal.RequestWithPath;
import jcifs.internal.SMBProtocolDecodingException;
import jcifs.internal.SMBSigningDigest;
import jcifs.internal.SmbNegotiation;
import jcifs.internal.SmbNegotiationResponse;
import jcifs.internal.dfs.DfsReferralDataImpl;
import jcifs.internal.dfs.DfsReferralRequestBuffer;
import jcifs.internal.dfs.DfsReferralResponseBuffer;
import jcifs.internal.dfs.Referral;
import jcifs.internal.smb1.AndXServerMessageBlock;
import jcifs.internal.smb1.ServerMessageBlock;
import jcifs.internal.smb1.com.SmbComBlankResponse;
import jcifs.internal.smb1.com.SmbComLockingAndX;
import jcifs.internal.smb1.com.SmbComNegotiate;
import jcifs.internal.smb1.com.SmbComNegotiateResponse;
import jcifs.internal.smb1.com.SmbComReadAndXResponse;
import jcifs.internal.smb1.trans.SmbComTransaction;
import jcifs.internal.smb1.trans.SmbComTransactionResponse;
import jcifs.internal.smb1.trans2.Trans2GetDfsReferral;
import jcifs.internal.smb1.trans2.Trans2GetDfsReferralResponse;
import jcifs.internal.smb2.ServerMessageBlock2;
import jcifs.internal.smb2.ServerMessageBlock2Request;
import jcifs.internal.smb2.ServerMessageBlock2Response;
import jcifs.internal.smb2.Smb2Constants;
import jcifs.internal.smb2.io.Smb2ReadResponse;
import jcifs.internal.smb2.ioctl.Smb2IoctlRequest;
import jcifs.internal.smb2.ioctl.Smb2IoctlResponse;
import jcifs.internal.smb2.lock.Smb2OplockBreakNotification;
import jcifs.internal.smb2.nego.EncryptionNegotiateContext;
import jcifs.internal.smb2.nego.Smb2NegotiateRequest;
import jcifs.internal.smb2.nego.Smb2NegotiateResponse;
import jcifs.netbios.Name;
import jcifs.netbios.NbtException;
import jcifs.netbios.SessionRequestPacket;
import jcifs.netbios.SessionServicePacket;
import jcifs.util.Crypto;
import jcifs.util.Encdec;
import jcifs.util.Hexdump;
import jcifs.util.transport.Request;
import jcifs.util.transport.Response;
import jcifs.util.transport.Transport;
import jcifs.util.transport.TransportException;
/**
*
*/
class SmbTransportImpl extends Transport implements SmbTransportInternal, SmbConstants {
private static Logger log = LoggerFactory.getLogger(SmbTransportImpl.class);
private boolean smb2 = false;
private InetAddress localAddr;
private int localPort;
private Address address;
private Socket socket;
private int port;
private final AtomicLong mid = new AtomicLong();
private OutputStream out;
private InputStream in;
private final byte[] sbuf = new byte[1024]; /* small local buffer */
private long sessionExpiration;
private final List sessions = new LinkedList<>();
private String tconHostName = null;
private final CIFSContext transportContext;
private final boolean signingEnforced;
private SmbNegotiationResponse negotiated;
private SMBSigningDigest digest;
private final Semaphore credits = new Semaphore(1, true);
private final int desiredCredits = 512;
private byte[] preauthIntegrityHash = new byte[64];
SmbTransportImpl ( CIFSContext tc, Address address, int port, InetAddress localAddr, int localPort, boolean forceSigning ) {
this.transportContext = tc;
this.signingEnforced = forceSigning || this.getContext().getConfig().isSigningEnforced();
this.sessionExpiration = System.currentTimeMillis() + tc.getConfig().getSessionTimeout();
this.address = address;
this.port = port;
this.localAddr = localAddr;
this.localPort = localPort;
}
/**
* {@inheritDoc}
*
* @see jcifs.util.transport.Transport#getResponseTimeout()
*/
@Override
protected int getResponseTimeout ( Request req ) {
if ( req instanceof CommonServerMessageBlockRequest ) {
Integer overrideTimeout = ( (CommonServerMessageBlockRequest) req ).getOverrideTimeout();
if ( overrideTimeout != null ) {
return overrideTimeout;
}
}
return getContext().getConfig().getResponseTimeout();
}
@Override
public Address getRemoteAddress () {
return this.address;
}
@Override
public String getRemoteHostName () {
return this.tconHostName;
}
/**
*
* @return number of sessions on this transport
*/
public int getNumSessions () {
return this.sessions.size();
}
@Override
public int getInflightRequests () {
return this.response_map.size();
}
@Override
public boolean isDisconnected () {
Socket s = this.socket;
return super.isDisconnected() || s == null || s.isClosed();
}
@Override
public boolean isFailed () {
Socket s = this.socket;
return super.isFailed() || s == null || s.isClosed();
}
@Override
public boolean hasCapability ( int cap ) throws SmbException {
return getNegotiateResponse().haveCapabilitiy(cap);
}
/**
* @return the negotiated
* @throws SmbException
*/
SmbNegotiationResponse getNegotiateResponse () throws SmbException {
try {
if ( this.negotiated == null ) {
connect(this.transportContext.getConfig().getResponseTimeout());
}
}
catch ( IOException ioe ) {
throw new SmbException(ioe.getMessage(), ioe);
}
return this.negotiated;
}
/**
* @return whether this is SMB2 transport
* @throws SmbException
*/
@Override
public boolean isSMB2 () throws SmbException {
return this.smb2 || getNegotiateResponse() instanceof Smb2NegotiateResponse;
}
/**
* @param digest
*/
public void setDigest ( SMBSigningDigest digest ) {
this.digest = digest;
}
/**
* @return the digest
*/
public SMBSigningDigest getDigest () {
return this.digest;
}
/**
* @return the context associated with this transport connection
*/
@Override
public CIFSContext getContext () {
return this.transportContext;
}
/**
* {@inheritDoc}
*
* @see jcifs.util.transport.Transport#acquire()
*/
@Override
public SmbTransportImpl acquire () {
return (SmbTransportImpl) super.acquire();
}
/**
* @return the server's encryption key
*/
@Override
public byte[] getServerEncryptionKey () {
if ( this.negotiated == null ) {
return null;
}
if ( this.negotiated instanceof SmbComNegotiateResponse ) {
return ( (SmbComNegotiateResponse) this.negotiated ).getServerData().encryptionKey;
}
return null;
}
@Override
public boolean isSigningOptional () throws SmbException {
if ( this.signingEnforced ) {
return false;
}
SmbNegotiationResponse nego = getNegotiateResponse();
return nego.isSigningNegotiated() && !nego.isSigningRequired();
}
@Override
public boolean isSigningEnforced () throws SmbException {
if ( this.signingEnforced ) {
return true;
}
return getNegotiateResponse().isSigningRequired();
}
/**
* {@inheritDoc}
*
* @see jcifs.SmbTransport#unwrap(java.lang.Class)
*/
@SuppressWarnings ( "unchecked" )
@Override
public T unwrap ( Class type ) {
if ( type.isAssignableFrom(this.getClass()) ) {
return (T) this;
}
throw new ClassCastException();
}
/**
*
* @param tf
* @return a session for the context
*/
@Override
public SmbSessionImpl getSmbSession ( CIFSContext tf ) {
return getSmbSession(tf, null, null);
}
/**
*
* @param tf
* context to use
* @return a session for the context
*/
@Override
@SuppressWarnings ( "resource" )
public synchronized SmbSessionImpl getSmbSession ( CIFSContext tf, String targetHost, String targetDomain ) {
long now;
if ( log.isTraceEnabled() ) {
log.trace("Currently " + this.sessions.size() + " session(s) active for " + this);
}
if ( targetHost != null ) {
targetHost = targetHost.toLowerCase(Locale.ROOT);
}
if ( targetDomain != null ) {
targetDomain = targetDomain.toUpperCase(Locale.ROOT);
}
ListIterator iter = this.sessions.listIterator();
while ( iter.hasNext() ) {
SmbSessionImpl ssn = iter.next();
if ( ssn.matches(tf, targetHost, targetDomain) ) {
if ( log.isTraceEnabled() ) {
log.trace("Reusing existing session " + ssn);
}
return ssn.acquire();
}
else if ( log.isTraceEnabled() ) {
log.trace("Existing session " + ssn + " does not match " + tf.getCredentials());
}
}
/* logoff old sessions */
if ( tf.getConfig().getSessionTimeout() > 0 && this.sessionExpiration < ( now = System.currentTimeMillis() ) ) {
this.sessionExpiration = now + tf.getConfig().getSessionTimeout();
iter = this.sessions.listIterator();
while ( iter.hasNext() ) {
SmbSessionImpl ssn = iter.next();
if ( ssn.getExpiration() != null && ssn.getExpiration() < now && !ssn.isInUse() ) {
if ( log.isDebugEnabled() ) {
log.debug("Closing session after timeout " + ssn);
}
ssn.logoff(false, false);
}
}
}
SmbSessionImpl ssn = new SmbSessionImpl(tf, targetHost, targetDomain, this);
if ( log.isDebugEnabled() ) {
log.debug("Establishing new session " + ssn + " on " + this.name);
}
this.sessions.add(ssn);
return ssn;
}
boolean matches ( Address addr, int prt, InetAddress laddr, int lprt, String hostName ) {
if ( this.state == 5 || this.state == 6 ) {
// don't reuse disconnecting/disconnected transports
return false;
}
if ( hostName == null )
hostName = addr.getHostName();
return ( this.tconHostName == null || hostName.equalsIgnoreCase(this.tconHostName) ) && addr.equals(this.address)
&& ( prt == 0 || prt == this.port ||
/* port 139 is ok if 445 was requested */
( prt == 445 && this.port == 139 ) )
&& ( laddr == this.localAddr || ( laddr != null && laddr.equals(this.localAddr) ) ) && lprt == this.localPort;
}
void ssn139 () throws IOException {
CIFSContext tc = this.transportContext;
Name calledName = new Name(tc.getConfig(), this.address.firstCalledName(), 0x20, null);
do {
this.socket = new Socket();
if ( this.localAddr != null )
this.socket.bind(new InetSocketAddress(this.localAddr, this.localPort));
this.socket.connect(new InetSocketAddress(this.address.getHostAddress(), 139), tc.getConfig().getConnTimeout());
this.socket.setSoTimeout(tc.getConfig().getSoTimeout());
this.out = this.socket.getOutputStream();
this.in = this.socket.getInputStream();
SessionServicePacket ssp = new SessionRequestPacket(tc.getConfig(), calledName, tc.getNameServiceClient().getLocalName());
this.out.write(this.sbuf, 0, ssp.writeWireFormat(this.sbuf, 0));
if ( readn(this.in, this.sbuf, 0, 4) < 4 ) {
try {
this.socket.close();
}
catch ( IOException ioe ) {
log.debug("Failed to close socket", ioe);
}
throw new SmbException("EOF during NetBIOS session request");
}
switch ( this.sbuf[ 0 ] & 0xFF ) {
case SessionServicePacket.POSITIVE_SESSION_RESPONSE:
if ( log.isDebugEnabled() ) {
log.debug("session established ok with " + this.address);
}
return;
case SessionServicePacket.NEGATIVE_SESSION_RESPONSE:
int errorCode = this.in.read() & 0xFF;
switch ( errorCode ) {
case NbtException.CALLED_NOT_PRESENT:
case NbtException.NOT_LISTENING_CALLED:
this.socket.close();
break;
default:
disconnect(true);
throw new NbtException(NbtException.ERR_SSN_SRVC, errorCode);
}
break;
case -1:
disconnect(true);
throw new NbtException(NbtException.ERR_SSN_SRVC, NbtException.CONNECTION_REFUSED);
default:
disconnect(true);
throw new NbtException(NbtException.ERR_SSN_SRVC, 0);
}
}
while ( ( calledName.name = this.address.nextCalledName(tc) ) != null );
throw new IOException("Failed to establish session with " + this.address);
}
private SmbNegotiation negotiate ( int prt ) throws IOException {
/*
* We cannot use Transport.sendrecv() yet because
* the Transport thread is not setup until doConnect()
* returns and we want to suppress all communication
* until we have properly negotiated.
*/
synchronized ( this.inLock ) {
if ( prt == 139 ) {
ssn139();
}
else {
if ( prt == 0 )
prt = DEFAULT_PORT; // 445
this.socket = new Socket();
if ( this.localAddr != null )
this.socket.bind(new InetSocketAddress(this.localAddr, this.localPort));
this.socket.connect(new InetSocketAddress(this.address.getHostAddress(), prt), this.transportContext.getConfig().getConnTimeout());
this.socket.setSoTimeout(this.transportContext.getConfig().getSoTimeout());
this.out = this.socket.getOutputStream();
this.in = this.socket.getInputStream();
}
if ( this.smb2 || this.getContext().getConfig().isUseSMB2OnlyNegotiation() ) {
log.debug("Using SMB2 only negotiation");
return negotiate2(null);
}
SmbComNegotiate comNeg = new SmbComNegotiate(getContext().getConfig(), this.signingEnforced);
int n = negotiateWrite(comNeg, true);
negotiatePeek();
SmbNegotiationResponse resp = null;
if ( !this.smb2 ) {
if ( this.getContext().getConfig().getMinimumVersion().isSMB2() ) {
throw new CIFSException("Server does not support SMB2");
}
resp = new SmbComNegotiateResponse(getContext());
resp.decode(this.sbuf, 4);
resp.received();
if ( log.isTraceEnabled() ) {
log.trace(resp.toString());
log.trace(Hexdump.toHexString(this.sbuf, 4, n));
}
}
else {
Smb2NegotiateResponse r = new Smb2NegotiateResponse(getContext().getConfig());
r.decode(this.sbuf, 4);
r.received();
if ( r.getDialectRevision() != Smb2Constants.SMB2_DIALECT_ANY && r.getDialectRevision() != Smb2Constants.SMB2_DIALECT_0202 ) {
throw new CIFSException("Server returned invalid dialect verison in multi protocol negotiation");
}
return negotiate2(r);
}
int permits = resp.getInitialCredits() - 1;
if ( permits > 0 ) {
this.credits.release(permits);
}
Arrays.fill(this.sbuf, (byte) 0);
return new SmbNegotiation(comNeg, resp, null, null);
}
}
/**
* @return
* @throws IOException
*/
private int negotiateWrite ( CommonServerMessageBlockRequest req, boolean setmid ) throws IOException {
if ( setmid ) {
makeKey(req);
}
else {
req.setMid(0);
this.mid.set(1);
}
int n = req.encode(this.sbuf, 4);
Encdec.enc_uint32be(n & 0xFFFF, this.sbuf, 0); /* 4 byte ssn msg header */
if ( log.isTraceEnabled() ) {
log.trace(req.toString());
log.trace(Hexdump.toHexString(this.sbuf, 4, n));
}
this.out.write(this.sbuf, 0, 4 + n);
this.out.flush();
log.trace("Wrote negotiate request");
return n;
}
/**
* @throws SocketException
* @throws IOException
*/
private void negotiatePeek () throws SocketException, IOException {
/*
* Note the Transport thread isn't running yet so we can
* read from the socket here.
*/
try {
this.socket.setSoTimeout(this.transportContext.getConfig().getConnTimeout());
if ( peekKey() == null ) /* try to read header */
throw new IOException("transport closed in negotiate");
}
finally {
this.socket.setSoTimeout(this.transportContext.getConfig().getSoTimeout());
}
int size = Encdec.dec_uint16be(this.sbuf, 2) & 0xFFFF;
if ( size < 33 || ( 4 + size ) > this.sbuf.length ) {
throw new IOException("Invalid payload size: " + size);
}
int hdrSize = this.smb2 ? Smb2Constants.SMB2_HEADER_LENGTH : SMB1_HEADER_LENGTH;
readn(this.in, this.sbuf, 4 + hdrSize, size - hdrSize);
log.trace("Read negotiate response");
}
/**
* @param first
* @param n
* @return
* @throws IOException
* @throws SocketException
* @throws InterruptedException
*/
private SmbNegotiation negotiate2 ( Smb2NegotiateResponse first ) throws IOException, SocketException {
int size = 0;
int securityMode = getRequestSecurityMode(first);
// further negotiation needed
Smb2NegotiateRequest smb2neg = new Smb2NegotiateRequest(getContext().getConfig(), securityMode);
if ( this.credits.drainPermits() == 0 ) {
throw new IOException("No credits for negotiate");
}
Smb2NegotiateResponse r = null;
byte[] negoReqBuffer = null;
byte[] negoRespBuffer = null;
try {
smb2neg.setRequestCredits(Math.max(1, this.desiredCredits - this.credits.availablePermits()));
int reqLen = negotiateWrite(smb2neg, first != null);
boolean doPreauth = getContext().getConfig().getMaximumVersion().atLeast(DialectVersion.SMB311);
if ( doPreauth ) {
negoReqBuffer = new byte[reqLen];
System.arraycopy(this.sbuf, 4, negoReqBuffer, 0, reqLen);
}
negotiatePeek();
r = smb2neg.initResponse(getContext());
int respLen = r.decode(this.sbuf, 4);
r.received();
if ( doPreauth ) {
negoRespBuffer = new byte[respLen];
System.arraycopy(this.sbuf, 4, negoRespBuffer, 0, respLen);
}
else {
negoReqBuffer = null;
}
if ( log.isTraceEnabled() ) {
log.trace(r.toString());
log.trace(Hexdump.toHexString(this.sbuf, 4, size));
}
return new SmbNegotiation(smb2neg, r, negoReqBuffer, negoRespBuffer);
}
finally {
int grantedCredits = r != null ? r.getGrantedCredits() : 0;
if ( grantedCredits == 0 ) {
grantedCredits = 1;
}
this.credits.release(grantedCredits);
Arrays.fill(this.sbuf, (byte) 0);
}
}
/**
* Connect the transport
*
* @throws SmbException
*/
@Override
public boolean ensureConnected () throws SmbException {
try {
return super.connect(this.transportContext.getConfig().getResponseTimeout());
}
catch ( TransportException te ) {
throw new SmbException("Failed to connect: " + this.address, te);
}
}
@Override
protected void doConnect () throws IOException {
/*
* Negotiate Protocol Request / Response
*/
if ( log.isDebugEnabled() ) {
log.debug("Connecting in state " + this.state + " addr " + this.address.getHostAddress());
}
SmbNegotiation resp;
try {
resp = negotiate(this.port);
}
catch ( IOException ce ) {
if ( getContext().getConfig().isPort139FailoverEnabled() ) {
this.port = ( this.port == 0 || this.port == DEFAULT_PORT ) ? 139 : DEFAULT_PORT;
this.smb2 = false;
this.mid.set(0);
resp = negotiate(this.port);
}
else {
throw ce;
}
}
if ( resp == null || resp.getResponse() == null ) {
throw new SmbException("Failed to connect.");
}
if ( log.isDebugEnabled() ) {
log.debug("Negotiation response on " + this.name + " :" + resp);
}
if ( !resp.getResponse().isValid(getContext(), resp.getRequest()) ) {
throw new SmbException("This client is not compatible with the server.");
}
boolean serverRequireSig = resp.getResponse().isSigningRequired();
boolean serverEnableSig = resp.getResponse().isSigningEnabled();
if ( log.isDebugEnabled() ) {
log.debug(
"Signature negotiation enforced " + this.signingEnforced + " (server " + serverRequireSig + ") enabled "
+ this.getContext().getConfig().isSigningEnabled() + " (server " + serverEnableSig + ")");
}
/* Adjust negotiated values */
this.tconHostName = this.address.getHostName();
this.negotiated = resp.getResponse();
if ( resp.getResponse().getSelectedDialect().atLeast(DialectVersion.SMB311) ) {
updatePreauthHash(resp.getRequestRaw());
updatePreauthHash(resp.getResponseRaw());
if ( log.isDebugEnabled() ) {
log.debug("Preauth hash after negotiate " + Hexdump.toHexString(this.preauthIntegrityHash));
}
}
}
protected synchronized void doDisconnect ( boolean hard ) throws IOException {
doDisconnect(hard, false);
}
@Override
protected synchronized boolean doDisconnect ( boolean hard, boolean inUse ) throws IOException {
ListIterator iter = this.sessions.listIterator();
boolean wasInUse = false;
long l = getUsageCount();
if ( ( inUse && l != 1 ) || ( !inUse && l > 0 ) ) {
log.warn("Disconnecting transport while still in use " + this + ": " + this.sessions);
wasInUse = true;
}
if ( log.isDebugEnabled() ) {
log.debug("Disconnecting transport " + this);
}
try {
if ( log.isTraceEnabled() ) {
log.trace("Currently " + this.sessions.size() + " session(s) active for " + this);
}
while ( iter.hasNext() ) {
@SuppressWarnings ( "resource" )
SmbSessionImpl ssn = iter.next();
try {
wasInUse |= ssn.logoff(hard, false);
}
catch ( Exception e ) {
log.debug("Failed to close session", e);
}
finally {
iter.remove();
}
}
if ( this.socket != null ) {
this.socket.shutdownOutput();
this.out.close();
this.in.close();
this.socket.close();
log.trace("Socket closed");
}
else {
log.trace("Not yet initialized");
}
}
catch ( Exception e ) {
log.debug("Exception in disconnect", e);
}
finally {
this.socket = null;
this.digest = null;
this.tconHostName = null;
this.transportContext.getTransportPool().removeTransport(this);
}
return wasInUse;
}
@Override
protected long makeKey ( Request request ) throws IOException {
long m = this.mid.incrementAndGet() - 1;
if ( !this.smb2 ) {
m = ( m % 32000 );
}
( (CommonServerMessageBlock) request ).setMid(m);
return m;
}
@Override
protected Long peekKey () throws IOException {
do {
if ( ( readn(this.in, this.sbuf, 0, 4) ) < 4 ) {
return null;
}
}
while ( this.sbuf[ 0 ] == (byte) 0x85 ); /* Dodge NetBIOS keep-alive */
/* read smb header */
if ( ( readn(this.in, this.sbuf, 4, SmbConstants.SMB1_HEADER_LENGTH) ) < SmbConstants.SMB1_HEADER_LENGTH ) {
return null;
}
if ( log.isTraceEnabled() ) {
log.trace("New data read: " + this);
log.trace(Hexdump.toHexString(this.sbuf, 4, 32));
}
for ( ;; ) {
/*
* 01234567
* 00SSFSMB
* 0 - 0's
* S - size of payload
* FSMB - 0xFF SMB magic #
*/
if ( this.sbuf[ 0 ] == (byte) 0x00 && this.sbuf[ 4 ] == (byte) 0xFE && this.sbuf[ 5 ] == (byte) 'S' && this.sbuf[ 6 ] == (byte) 'M'
&& this.sbuf[ 7 ] == (byte) 'B' ) {
this.smb2 = true;
// also read the rest of the header
int lenDiff = Smb2Constants.SMB2_HEADER_LENGTH - SmbConstants.SMB1_HEADER_LENGTH;
if ( readn(this.in, this.sbuf, 4 + SmbConstants.SMB1_HEADER_LENGTH, lenDiff) < lenDiff ) {
return null;
}
return (long) Encdec.dec_uint64le(this.sbuf, 28);
}
if ( this.sbuf[ 0 ] == (byte) 0x00 && this.sbuf[ 1 ] == (byte) 0x00 && ( this.sbuf[ 4 ] == (byte) 0xFF ) && this.sbuf[ 5 ] == (byte) 'S'
&& this.sbuf[ 6 ] == (byte) 'M' && this.sbuf[ 7 ] == (byte) 'B' ) {
break; /* all good (SMB) */
}
/* out of phase maybe? */
/* inch forward 1 byte and try again */
for ( int i = 0; i < 35; i++ ) {
log.warn("Possibly out of phase, trying to resync " + Hexdump.toHexString(this.sbuf, 0, 16));
this.sbuf[ i ] = this.sbuf[ i + 1 ];
}
int b;
if ( ( b = this.in.read() ) == -1 )
return null;
this.sbuf[ 35 ] = (byte) b;
}
/*
* Unless key returned is null or invalid Transport.loop() always
* calls doRecv() after and no one else but the transport thread
* should call doRecv(). Therefore it is ok to expect that the data
* in sbuf will be preserved for copying into BUF in doRecv().
*/
return (long) Encdec.dec_uint16le(this.sbuf, 34) & 0xFFFF;
}
@Override
protected void doSend ( Request request ) throws IOException {
CommonServerMessageBlock smb = (CommonServerMessageBlock) request;
byte[] buffer = this.getContext().getBufferCache().getBuffer();
try {
// synchronize around encode and write so that the ordering for SMB1 signing can be maintained
synchronized ( this.outLock ) {
int n = smb.encode(buffer, 4);
Encdec.enc_uint32be(n & 0xFFFF, buffer, 0); /* 4 byte session message header */
if ( log.isTraceEnabled() ) {
do {
log.trace(smb.toString());
}
while ( smb instanceof AndXServerMessageBlock && ( smb = ( (AndXServerMessageBlock) smb ).getAndx() ) != null );
log.trace(Hexdump.toHexString(buffer, 4, n));
}
/*
* For some reason this can sometimes get broken up into another
* "NBSS Continuation Message" frame according to WireShark
*/
this.out.write(buffer, 0, 4 + n);
this.out.flush();
}
}
finally {
this.getContext().getBufferCache().releaseBuffer(buffer);
}
}
@SuppressWarnings ( "unchecked" )
public T sendrecv ( CommonServerMessageBlockRequest request, T response, Set params )
throws IOException {
if ( request instanceof jcifs.internal.Request ) {
if ( response == null ) {
response = (T) ( (jcifs.internal.Request) request ).initResponse(getContext());
}
else if ( isSMB2() ) {
throw new IOException("Should not provide response argument for SMB2");
}
}
else {
request.setResponse(response);
}
if ( response == null ) {
throw new IOException("Invalid response");
}
CommonServerMessageBlockRequest curHead = request;
int maxSize = getContext().getConfig().getMaximumBufferSize();
while ( curHead != null ) {
CommonServerMessageBlockRequest nextHead = null;
int totalSize = 0;
int n = 0;
CommonServerMessageBlockRequest last = null;
CommonServerMessageBlockRequest chain = curHead;
while ( chain != null ) {
n++;
int size = chain.size();
int cost = chain.getCreditCost();
CommonServerMessageBlockRequest next = chain.getNext();
if ( log.isTraceEnabled() ) {
log.trace(
String.format("%s costs %d avail %d (%s)", chain.getClass().getName(), cost, this.credits.availablePermits(), this.name));
}
if ( ( next == null || chain.allowChain(next) ) && totalSize + size < maxSize && this.credits.tryAcquire(cost) ) {
totalSize += size;
last = chain;
chain = next;
}
else if ( last == null && totalSize + size > maxSize ) {
throw new SmbException(String.format("Request size %d exceeds allowable size %d: %s", size, maxSize, chain));
}
else if ( last == null ) {
// don't have enough credits/space for the first request, block until available
// for space there is nothing we can do, callers need to make sure that a single message fits
try {
long timeout = getResponseTimeout(chain);
if ( !params.contains(RequestParam.NO_TIMEOUT) ) {
this.credits.acquire(cost);
}
else {
if ( !this.credits.tryAcquire(cost, timeout, TimeUnit.MILLISECONDS) ) {
throw new SmbException("Failed to acquire credits in time");
}
}
totalSize += size;
// split off first request
synchronized ( chain ) {
CommonServerMessageBlockRequest snext = chain.split();
nextHead = snext;
if ( log.isDebugEnabled() && snext != null ) {
log.debug("Insufficient credits, send only first " + chain + " next is " + snext);
}
}
break;
}
catch ( InterruptedException e ) {
throw new InterruptedIOException("Failed to acquire credits, exzessive parallelism?");
}
}
else {
// not enough credits available or too big, split
if ( log.isDebugEnabled() ) {
log.debug("Not enough credits, split at " + last);
}
synchronized ( last ) {
nextHead = last.split();
}
break;
}
}
int reqCredits = Math.max(1, this.desiredCredits - this.credits.availablePermits() - n + 1);
if ( log.isTraceEnabled() ) {
log.trace("Request credits " + reqCredits);
}
request.setRequestCredits(reqCredits);
CommonServerMessageBlockRequest thisReq = curHead;
try {
CommonServerMessageBlockResponse resp = thisReq.getResponse();
if ( log.isTraceEnabled() ) {
log.trace("Sending " + thisReq);
}
resp = super.sendrecv(curHead, resp, params);
if ( !checkStatus(curHead, resp) ) {
if ( log.isDebugEnabled() ) {
log.debug("Breaking on error " + resp);
}
break;
}
if ( nextHead != null ) {
// prepare remaining
// (e.g. set session/tree/fileid returned by the previous requests)
resp.prepare(nextHead);
}
curHead = nextHead;
}
finally {
CommonServerMessageBlockRequest curReq = thisReq;
int grantedCredits = 0;
// if
while ( curReq != null ) {
if ( curReq.isResponseAsync() ) {
log.trace("Async");
break;
}
CommonServerMessageBlockResponse resp = curReq.getResponse();
if ( resp.isReceived() ) {
grantedCredits += resp.getGrantedCredits();
}
CommonServerMessageBlockRequest next = curReq.getNext();
if ( next == null ) {
break;
}
curReq = next;
}
if ( !isDisconnected() && !curReq.isResponseAsync() && !curReq.getResponse().isAsync() && !curReq.getResponse().isError()
&& grantedCredits == 0 ) {
if ( this.credits.availablePermits() > 0 || n > 0 ) {
log.debug("Server " + this + " returned zero credits for " + curReq);
}
else {
log.warn("Server " + this + " took away all our credits");
}
}
else if ( !curReq.isResponseAsync() ) {
if ( log.isTraceEnabled() ) {
log.trace("Adding credits " + grantedCredits);
}
this.credits.release(grantedCredits);
}
}
}
if ( !response.isReceived() ) {
throw new IOException("No response", response.getException());
}
return response;
}
@Override
protected boolean handleIntermediate ( Request request, T response ) {
if ( !this.smb2 ) {
return false;
}
ServerMessageBlock2Request req = (ServerMessageBlock2Request) request;
ServerMessageBlock2Response resp = (ServerMessageBlock2Response) response;
synchronized ( resp ) {
if ( resp.isAsync() && !resp.isAsyncHandled() && resp.getStatus() == NtStatus.NT_STATUS_PENDING && resp.getAsyncId() != 0 ) {
resp.setAsyncHandled(true);
boolean first = !req.isAsync();
req.setAsyncId(resp.getAsyncId());
Long exp = resp.getExpiration();
if ( exp != null ) {
resp.setExpiration(System.currentTimeMillis() + getResponseTimeout(request));
}
if ( log.isDebugEnabled() ) {
log.debug("Have intermediate reply " + response);
}
if ( first ) {
int credit = resp.getCredit();
if ( log.isDebugEnabled() ) {
log.debug("Credit from intermediate " + credit);
}
this.credits.release(credit);
}
return true;
}
}
return false;
}
protected void doSend0 ( Request request ) throws IOException {
try {
doSend(request);
}
catch ( IOException ioe ) {
log.warn("send failed", ioe);
try {
disconnect(true);
}
catch ( IOException ioe2 ) {
ioe.addSuppressed(ioe2);
log.error("disconnect failed", ioe2);
}
throw ioe;
}
}
// must be synchronized with peekKey
@Override
protected void doRecv ( Response response ) throws IOException {
CommonServerMessageBlock resp = (CommonServerMessageBlock) response;
this.negotiated.setupResponse(response);
try {
if ( this.smb2 ) {
doRecvSMB2(resp);
}
else {
doRecvSMB1(resp);
}
}
catch ( Exception e ) {
log.warn("Failure decoding message, disconnecting transport", e);
response.exception(e);
synchronized ( response ) {
response.notifyAll();
}
throw e;
}
}
/**
* @param response
* @throws IOException
* @throws SMBProtocolDecodingException
*/
private void doRecvSMB2 ( CommonServerMessageBlock response ) throws IOException, SMBProtocolDecodingException {
int size = ( Encdec.dec_uint16be(this.sbuf, 2) & 0xFFFF ) | ( this.sbuf[ 1 ] & 0xFF ) << 16;
if ( size < ( Smb2Constants.SMB2_HEADER_LENGTH + 1 ) ) {
throw new IOException("Invalid payload size: " + size);
}
if ( this.sbuf[ 0 ] != (byte) 0x00 || this.sbuf[ 4 ] != (byte) 0xFE || this.sbuf[ 5 ] != (byte) 'S' || this.sbuf[ 6 ] != (byte) 'M'
|| this.sbuf[ 7 ] != (byte) 'B' ) {
throw new IOException("Houston we have a synchronization problem");
}
int nextCommand = Encdec.dec_uint32le(this.sbuf, 4 + 20);
int maximumBufferSize = getContext().getConfig().getMaximumBufferSize();
int msgSize = nextCommand != 0 ? nextCommand : size;
if ( msgSize > maximumBufferSize ) {
throw new IOException(String.format("Message size %d exceeds maxiumum buffer size %d", msgSize, maximumBufferSize));
}
ServerMessageBlock2Response cur = (ServerMessageBlock2Response) response;
byte[] buffer = getContext().getBufferCache().getBuffer();
try {
int rl = nextCommand != 0 ? nextCommand : size;
// read and decode first
System.arraycopy(this.sbuf, 4, buffer, 0, Smb2Constants.SMB2_HEADER_LENGTH);
readn(this.in, buffer, Smb2Constants.SMB2_HEADER_LENGTH, rl - Smb2Constants.SMB2_HEADER_LENGTH);
int len = cur.decode(buffer, 0);
if ( len > rl ) {
throw new IOException(String.format("WHAT? ( read %d decoded %d ): %s", rl, len, cur));
}
else if ( nextCommand != 0 && len > nextCommand ) {
throw new IOException("Overlapping commands");
}
size -= rl;
while ( size > 0 && nextCommand != 0 ) {
cur = (ServerMessageBlock2Response) cur.getNextResponse();
if ( cur == null ) {
log.warn("Response not properly set up");
this.in.skip(size);
break;
}
// read next header
readn(this.in, buffer, 0, Smb2Constants.SMB2_HEADER_LENGTH);
nextCommand = Encdec.dec_uint32le(buffer, 20);
if ( ( nextCommand != 0 && nextCommand > maximumBufferSize ) || ( nextCommand == 0 && size > maximumBufferSize ) ) {
throw new IOException(
String.format("Message size %d exceeds maxiumum buffer size %d", nextCommand != 0 ? nextCommand : size, maximumBufferSize));
}
rl = nextCommand != 0 ? nextCommand : size;
if ( log.isDebugEnabled() ) {
log.debug(String.format("Compound next command %d read size %d remain %d", nextCommand, rl, size));
}
readn(this.in, buffer, Smb2Constants.SMB2_HEADER_LENGTH, rl - Smb2Constants.SMB2_HEADER_LENGTH);
len = cur.decode(buffer, 0, true);
if ( len > rl ) {
throw new IOException(String.format("WHAT? ( read %d decoded %d ): %s", rl, len, cur));
}
else if ( nextCommand != 0 && len > nextCommand ) {
throw new IOException("Overlapping commands");
}
size -= rl;
}
}
finally {
getContext().getBufferCache().releaseBuffer(buffer);
}
}
/**
* @param resp
* @throws IOException
* @throws SMBProtocolDecodingException
*/
private void doRecvSMB1 ( CommonServerMessageBlock resp ) throws IOException, SMBProtocolDecodingException {
byte[] buffer = getContext().getBufferCache().getBuffer();
try {
System.arraycopy(this.sbuf, 0, buffer, 0, 4 + SMB1_HEADER_LENGTH);
int size = ( Encdec.dec_uint16be(buffer, 2) & 0xFFFF );
if ( size < ( SMB1_HEADER_LENGTH + 1 ) || ( 4 + size ) > Math.min(0xFFFF, getContext().getConfig().getMaximumBufferSize()) ) {
throw new IOException("Invalid payload size: " + size);
}
int errorCode = Encdec.dec_uint32le(buffer, 9) & 0xFFFFFFFF;
if ( resp.getCommand() == ServerMessageBlock.SMB_COM_READ_ANDX && ( errorCode == 0 || errorCode == NtStatus.NT_STATUS_BUFFER_OVERFLOW ) ) {
// overflow indicator normal for pipe
SmbComReadAndXResponse r = (SmbComReadAndXResponse) resp;
int off = SMB1_HEADER_LENGTH;
/* WordCount thru dataOffset always 27 */
readn(this.in, buffer, 4 + off, 27);
off += 27;
resp.decode(buffer, 4);
/* EMC can send pad w/o data */
int pad = r.getDataOffset() - off;
if ( r.getByteCount() > 0 && pad > 0 && pad < 4 )
readn(this.in, buffer, 4 + off, pad);
if ( r.getDataLength() > 0 ) {
readn(this.in, r.getData(), r.getOffset(), r.getDataLength()); /* read direct */
}
}
else {
readn(this.in, buffer, 4 + SMB1_HEADER_LENGTH, size - SMB1_HEADER_LENGTH);
resp.decode(buffer, 4);
}
}
finally {
getContext().getBufferCache().releaseBuffer(buffer);
}
}
@Override
protected void doSkip ( Long key ) throws IOException {
synchronized ( this.inLock ) {
int size = Encdec.dec_uint16be(this.sbuf, 2) & 0xFFFF;
if ( size < 33 || ( 4 + size ) > this.getContext().getConfig().getReceiveBufferSize() ) {
/* log message? */
log.warn("Flusing stream input");
this.in.skip(this.in.available());
}
else {
Response notification = createNotification(key);
if ( notification != null ) {
log.debug("Parsing notification");
doRecv(notification);
handleNotification(notification);
return;
}
log.warn("Skipping message " + key);
this.in.skip(size - 32);
}
}
}
/**
* @param notification
*/
protected void handleNotification ( Response notification ) {
log.info("Received notification " + notification);
}
/**
* @param key
* @return
* @throws SmbException
*/
protected Response createNotification ( Long key ) throws SmbException {
if ( key == null ) {
// no valid header
return null;
}
if ( this.smb2 ) {
if ( key != -1 ) {
return null;
}
int cmd = Encdec.dec_uint16le(this.sbuf, 4 + 12) & 0xFFFF;
if ( cmd == 0x12 ) {
return new Smb2OplockBreakNotification(getContext().getConfig());
}
}
else {
if ( key != 0xFFFF ) {
return null;
}
int cmd = this.sbuf[ 4 + 4 ];
if ( cmd == 0x24 ) {
return new SmbComLockingAndX(getContext().getConfig());
}
}
return null;
}
boolean checkStatus ( ServerMessageBlock req, ServerMessageBlock resp ) throws SmbException {
boolean cont = false;
if ( resp.getErrorCode() == 0x30002 ) {
// if using DOS error codes this indicates a DFS referral
resp.setErrorCode(NtStatus.NT_STATUS_PATH_NOT_COVERED);
}
else {
resp.setErrorCode(SmbException.getStatusByCode(resp.getErrorCode()));
}
switch ( resp.getErrorCode() ) {
case NtStatus.NT_STATUS_OK:
cont = true;
break;
case NtStatus.NT_STATUS_ACCESS_DENIED:
case NtStatus.NT_STATUS_WRONG_PASSWORD:
case NtStatus.NT_STATUS_LOGON_FAILURE:
case NtStatus.NT_STATUS_ACCOUNT_RESTRICTION:
case NtStatus.NT_STATUS_INVALID_LOGON_HOURS:
case NtStatus.NT_STATUS_INVALID_WORKSTATION:
case NtStatus.NT_STATUS_PASSWORD_EXPIRED:
case NtStatus.NT_STATUS_ACCOUNT_DISABLED:
case NtStatus.NT_STATUS_ACCOUNT_LOCKED_OUT:
case NtStatus.NT_STATUS_TRUSTED_DOMAIN_FAILURE:
throw new SmbAuthException(resp.getErrorCode());
case 0xC00000BB: // NT_STATUS_NOT_SUPPORTED
throw new SmbUnsupportedOperationException();
case NtStatus.NT_STATUS_PATH_NOT_COVERED:
// samba fails to report the proper status for some operations
case 0xC00000A2: // NT_STATUS_MEDIA_WRITE_PROTECTED
checkReferral(resp, req.getPath(), req);
case NtStatus.NT_STATUS_BUFFER_OVERFLOW:
break; /* normal for DCERPC named pipes */
case NtStatus.NT_STATUS_MORE_PROCESSING_REQUIRED:
break; /* normal for NTLMSSP */
default:
if ( log.isDebugEnabled() ) {
log.debug("Error code: 0x" + Hexdump.toHexString(resp.getErrorCode(), 8) + " for " + req.getClass().getSimpleName());
}
throw new SmbException(resp.getErrorCode(), null);
}
if ( resp.isVerifyFailed() ) {
throw new SmbException("Signature verification failed.");
}
return cont;
}
/**
* @param request
* @param response
* @throws SmbException
*/
boolean checkStatus2 ( ServerMessageBlock2 req, Response resp ) throws SmbException {
boolean cont = false;
switch ( resp.getErrorCode() ) {
case NtStatus.NT_STATUS_OK:
cont = true;
break;
case NtStatus.NT_STATUS_PENDING:
// must be the last
cont = false;
break;
case NtStatus.NT_STATUS_ACCESS_DENIED:
case NtStatus.NT_STATUS_WRONG_PASSWORD:
case NtStatus.NT_STATUS_LOGON_FAILURE:
case NtStatus.NT_STATUS_ACCOUNT_RESTRICTION:
case NtStatus.NT_STATUS_INVALID_LOGON_HOURS:
case NtStatus.NT_STATUS_INVALID_WORKSTATION:
case NtStatus.NT_STATUS_PASSWORD_EXPIRED:
case NtStatus.NT_STATUS_ACCOUNT_DISABLED:
case NtStatus.NT_STATUS_ACCOUNT_LOCKED_OUT:
case NtStatus.NT_STATUS_TRUSTED_DOMAIN_FAILURE:
throw new SmbAuthException(resp.getErrorCode());
case NtStatus.NT_STATUS_MORE_PROCESSING_REQUIRED:
break; /* normal for SPNEGO */
case 0x10B: // NT_STATUS_NOTIFY_CLEANUP:
case NtStatus.NT_STATUS_NOTIFY_ENUM_DIR:
break;
case 0xC00000BB: // NT_STATUS_NOT_SUPPORTED
throw new SmbUnsupportedOperationException();
case NtStatus.NT_STATUS_PATH_NOT_COVERED:
if ( ! ( req instanceof RequestWithPath ) ) {
throw new SmbException("Invalid request for a DFS NT_STATUS_PATH_NOT_COVERED response " + req.getClass().getName());
}
String path = ( (RequestWithPath) req ).getFullUNCPath();
checkReferral(resp, path, ( (RequestWithPath) req ));
// checkReferral always throws and exception but put break here for clarity
break;
case NtStatus.NT_STATUS_BUFFER_OVERFLOW:
if (resp instanceof Smb2ReadResponse) {
break;
}
if ( resp instanceof Smb2IoctlResponse ) {
int ctlCode = ((Smb2IoctlResponse) resp).getCtlCode();
if (ctlCode == Smb2IoctlRequest.FSCTL_PIPE_TRANSCEIVE ||
ctlCode == Smb2IoctlRequest.FSCTL_PIPE_PEEK) {
break;
}
}
// fall through
default:
if ( log.isDebugEnabled() ) {
log.debug("Error code: 0x" + Hexdump.toHexString(resp.getErrorCode(), 8) + " for " + req.getClass().getSimpleName());
}
throw new SmbException(resp.getErrorCode(), null);
}
if ( resp.isVerifyFailed() ) {
throw new SMBSignatureValidationException("Signature verification failed.");
}
return cont;
}
/**
* @param resp
* @param path
* @param req
* @throws SmbException
* @throws DfsReferral
*/
private void checkReferral ( Response resp, String path, RequestWithPath req ) throws SmbException, DfsReferral {
DfsReferralData dr = null;
if ( !getContext().getConfig().isDfsDisabled() ) {
try {
dr = getDfsReferrals(getContext(), path, req.getServer(), req.getDomain(), 1);
}
catch ( CIFSException e ) {
throw new SmbException("Failed to get DFS referral", e);
}
}
if ( dr == null ) {
if ( log.isDebugEnabled() ) {
log.debug("Error code: 0x" + Hexdump.toHexString(resp.getErrorCode(), 8));
}
throw new SmbException(resp.getErrorCode(), null);
}
if ( req.getDomain() != null && getContext().getConfig().isDfsConvertToFQDN() && dr instanceof DfsReferralDataImpl ) {
( (DfsReferralDataImpl) dr ).fixupDomain(req.getDomain());
}
if ( log.isDebugEnabled() ) {
log.debug("Got referral " + dr);
}
getContext().getDfs().cache(getContext(), path, dr);
throw new DfsReferral(dr);
}
T send ( CommonServerMessageBlockRequest request, T response ) throws SmbException {
return send(request, response, Collections. emptySet());
}
T send ( CommonServerMessageBlockRequest request, T response, Set params )
throws SmbException {
ensureConnected(); /* must negotiate before we can test flags2, useUnicode, etc */
if ( this.smb2 && ! ( request instanceof ServerMessageBlock2 ) ) {
throw new SmbException("Not an SMB2 request " + request.getClass().getName());
}
else if ( !this.smb2 && ! ( request instanceof ServerMessageBlock ) ) {
throw new SmbException("Not an SMB1 request");
}
this.negotiated.setupRequest(request);
if ( response != null ) {
request.setResponse(response); /* needed by sign */
response.setDigest(request.getDigest());
}
try {
if ( log.isTraceEnabled() ) {
log.trace("Sending " + request);
}
if ( request.isCancel() ) {
doSend0(request);
return null;
}
else if ( request instanceof SmbComTransaction ) {
response = sendComTransaction(request, response, params);
}
else {
if ( response != null ) {
response.setCommand(request.getCommand());
}
response = sendrecv(request, response, params);
}
}
catch ( SmbException se ) {
throw se;
}
catch ( IOException ioe ) {
throw new SmbException(ioe.getMessage(), ioe);
}
if ( log.isTraceEnabled() ) {
log.trace("Response is " + response);
}
checkStatus(request, response);
return response;
}
/**
* @param request
* @param response
* @throws SmbException
*/
private boolean checkStatus ( CommonServerMessageBlockRequest request, T response )
throws SmbException {
CommonServerMessageBlockRequest cur = request;
while ( cur != null ) {
if ( this.smb2 ) {
if ( !checkStatus2((ServerMessageBlock2) cur, cur.getResponse()) ) {
return false;
}
}
else {
if ( !checkStatus((ServerMessageBlock) cur, (ServerMessageBlock) cur.getResponse()) ) {
return false;
}
}
cur = cur.getNext();
}
return true;
}
/**
* @param request
* @param response
* @param params
* @throws IOException
* @throws SmbException
* @throws TransportException
* @throws EOFException
*/
private T sendComTransaction ( CommonServerMessageBlockRequest request, T response,
Set params ) throws IOException, SmbException, TransportException, EOFException {
response.setCommand(request.getCommand());
SmbComTransaction req = (SmbComTransaction) request;
SmbComTransactionResponse resp = (SmbComTransactionResponse) response;
resp.reset();
long k;
/*
* First request w/ interim response
*/
try {
req.setBuffer(getContext().getBufferCache().getBuffer());
req.nextElement();
if ( req.hasMoreElements() ) {
SmbComBlankResponse interim = new SmbComBlankResponse(getContext().getConfig());
super.sendrecv(req, interim, params);
if ( interim.getErrorCode() != 0 ) {
checkStatus(req, interim);
}
k = req.nextElement().getMid();
}
else {
k = makeKey(req);
}
try {
resp.clearReceived();
long timeout = getResponseTimeout(req);
if ( !params.contains(RequestParam.NO_TIMEOUT) ) {
resp.setExpiration(System.currentTimeMillis() + timeout);
}
else {
resp.setExpiration(null);
}
byte[] txbuf = getContext().getBufferCache().getBuffer();
resp.setBuffer(txbuf);
this.response_map.put(k, resp);
/*
* Send multiple fragments
*/
do {
doSend0(req);
}
while ( req.hasMoreElements() && req.nextElement() != null );
/*
* Receive multiple fragments
*/
synchronized ( resp ) {
while ( !resp.isReceived() || resp.hasMoreElements() ) {
if ( !params.contains(RequestParam.NO_TIMEOUT) ) {
resp.wait(timeout);
timeout = resp.getExpiration() - System.currentTimeMillis();
if ( timeout <= 0 ) {
throw new TransportException(this + " timedout waiting for response to " + req);
}
}
else {
resp.wait();
if ( log.isTraceEnabled() ) {
log.trace("Wait returned " + isDisconnected());
}
if ( isDisconnected() ) {
throw new EOFException("Transport closed while waiting for result");
}
}
}
}
if ( !resp.isReceived() ) {
throw new TransportException("Failed to read response");
}
if ( resp.getErrorCode() != 0 ) {
checkStatus(req, resp);
}
return response;
}
finally {
this.response_map.remove(k);
}
}
catch ( InterruptedException ie ) {
throw new TransportException(ie);
}
finally {
getContext().getBufferCache().releaseBuffer(req.releaseBuffer());
getContext().getBufferCache().releaseBuffer(resp.releaseBuffer());
}
}
@Override
public String toString () {
return super.toString() + "[" + this.address + ":" + this.port + ",state=" + this.state + ",signingEnforced=" + this.signingEnforced
+ ",usage=" + this.getUsageCount() + "]";
}
/* DFS */
@Override
public DfsReferralData getDfsReferrals ( CIFSContext ctx, String path, String targetHost, String targetDomain, int rn ) throws CIFSException {
if ( log.isDebugEnabled() ) {
log.debug("Resolving DFS path " + path);
}
if ( path.length() >= 2 && path.charAt(0) == '\\' && path.charAt(1) == '\\' ) {
throw new SmbException("Path must not start with double slash: " + path);
}
try ( SmbSessionImpl sess = getSmbSession(ctx, targetHost, targetDomain);
SmbTransportImpl transport = sess.getTransport();
SmbTreeImpl ipc = sess.getSmbTree("IPC$", null) ) {
DfsReferralRequestBuffer dfsReq = new DfsReferralRequestBuffer(path, 3);
DfsReferralResponseBuffer dfsResp;
if ( isSMB2() ) {
Smb2IoctlRequest req = new Smb2IoctlRequest(ctx.getConfig(), Smb2IoctlRequest.FSCTL_DFS_GET_REFERRALS);
req.setFlags(Smb2IoctlRequest.SMB2_O_IOCTL_IS_FSCTL);
req.setInputData(dfsReq);
dfsResp = ipc.send(req).getOutputData(DfsReferralResponseBuffer.class);
}
else {
Trans2GetDfsReferralResponse resp = new Trans2GetDfsReferralResponse(ctx.getConfig());
ipc.send(new Trans2GetDfsReferral(ctx.getConfig(), path), resp);
dfsResp = resp.getDfsResponse();
}
if ( dfsResp.getNumReferrals() == 0 ) {
return null;
}
else if ( rn == 0 || dfsResp.getNumReferrals() < rn ) {
rn = dfsResp.getNumReferrals();
}
DfsReferralDataImpl cur = null;
long expiration = System.currentTimeMillis() + ( ctx.getConfig().getDfsTtl() * 1000 );
Referral[] refs = dfsResp.getReferrals();
for ( int di = 0; di < rn; di++ ) {
DfsReferralDataImpl dr = DfsReferralDataImpl.fromReferral(refs[ di ], path, expiration, dfsResp.getPathConsumed());
dr.setDomain(targetDomain);
if ( ( dfsResp.getTflags() & 0x2 ) == 0 && ( dr.getFlags() & 0x2 ) == 0 ) {
log.debug("Non-root referral is not final " + dfsResp);
dr.intermediate();
}
if ( cur == null ) {
cur = dr;
}
else {
cur.append(dr);
cur = dr;
}
}
if ( log.isDebugEnabled() ) {
log.debug("Got referral " + cur);
}
return cur;
}
}
byte[] getPreauthIntegrityHash () {
return this.preauthIntegrityHash;
}
private void updatePreauthHash ( byte[] input ) throws CIFSException {
synchronized ( this.preauthIntegrityHash ) {
this.preauthIntegrityHash = calculatePreauthHash(input, 0, input.length, this.preauthIntegrityHash);
}
}
byte[] calculatePreauthHash ( byte[] input, int off, int len, byte[] oldHash ) throws CIFSException {
if ( !this.smb2 || this.negotiated == null ) {
throw new SmbUnsupportedOperationException();
}
Smb2NegotiateResponse resp = (Smb2NegotiateResponse) this.negotiated;
if ( !resp.getSelectedDialect().atLeast(DialectVersion.SMB311) ) {
throw new SmbUnsupportedOperationException();
}
MessageDigest dgst;
switch ( resp.getSelectedPreauthHash() ) {
case 1:
dgst = Crypto.getSHA512();
break;
default:
throw new SmbUnsupportedOperationException();
}
if ( oldHash != null ) {
dgst.update(oldHash);
}
dgst.update(input, off, len);
return dgst.digest();
}
Cipher createEncryptionCipher ( byte[] key ) throws CIFSException {
if ( !this.smb2 || this.negotiated == null ) {
throw new SmbUnsupportedOperationException();
}
Smb2NegotiateResponse resp = (Smb2NegotiateResponse) this.negotiated;
int cipherId = -1;
if ( resp.getSelectedDialect().atLeast(DialectVersion.SMB311) ) {
cipherId = resp.getSelectedCipher();
}
else if ( resp.getSelectedDialect().atLeast(DialectVersion.SMB300) ) {
cipherId = EncryptionNegotiateContext.CIPHER_AES128_CCM;
}
else {
throw new SmbUnsupportedOperationException();
}
switch ( cipherId ) {
case EncryptionNegotiateContext.CIPHER_AES128_CCM:
case EncryptionNegotiateContext.CIPHER_AES128_GCM:
default:
throw new SmbUnsupportedOperationException();
}
}
public int getRequestSecurityMode ( Smb2NegotiateResponse first ) {
int securityMode = Smb2Constants.SMB2_NEGOTIATE_SIGNING_ENABLED;
if ( this.signingEnforced || ( first != null && first.isSigningRequired() ) ) {
securityMode = Smb2Constants.SMB2_NEGOTIATE_SIGNING_REQUIRED | Smb2Constants.SMB2_NEGOTIATE_SIGNING_ENABLED;
}
return securityMode;
}
}
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