The library is available on Maven Central:
Release version:
<dependency>
<groupId>com.jaeksoft</groupId>
<artifactId>jcifs-krb5-jdk7</artifactId>
<version>1.3.18.1</version>
</dependency>Snapshot version:
<dependency>
<groupId>com.jaeksoft</groupId>
<artifactId>jcifs-krb5-jdk7</artifactId>
<version>1.3.18.2-SNAPSHOT</version>
</dependency>
<repositories>
<repository>
<id>oss.sonatype.org-snapshot</id>
<url>http://oss.sonatype.org/content/repositories/snapshots</url>
<releases><enabled>false</enabled></releases>
<snapshots><enabled>true</enabled></snapshots>
</repository>
</repositories>jcifs-1.3.18.2
Kerberos based connections fail when signing is enabled
The SMB context is signed by the kerberos connection session key. This key was extracted from the subject credentials, which looks as if could only have worked by coincidence.
The kerberos connection session contect key is not accessible via the JGSS API IBM and Oracle both implement a similar API to make an ExtendedGSSContext available.
The older implementation to find the session key is still available as a fallback, but it is not expected, that it works.
From "JCIFS with Kerberos doesn't work on JDK 7":
https://bugs.openjdk.java.net/browse/JDK-8031973:
This is a bug in JCIFS. It seems the SMB packet it generates that includes the AP-REQ token also includes something else that should be encrypted with the context session key. The standard GSS-API does not provide such a method so it looks up the service ticket in the subject and use its ticket session key instead. The context session key is not the ticket session key if sub key is used.
Possible patch: Fix jcifs.smb.Kerb5Context's searchSessionKey() method to call Oracle JDK's ExtendedGSSContext::inquireSecContext(InquireType.KRB5_GET_SESSION_KEY) to get the real session key. The classes are defined in com.sun.security.jgss.
Wed Oct 29 21:08:01 EDT 2014 jcifs-1.3.18
This release includes mostly minor fixes including: System.getProperties().clone() modified to prevent ConcurrentModificationException when loading classes. A logical check has been added to prevent a NullPointerException. Reset tree if transport disconnected. DCERPC error message improved.
Note: There are several other bugs that have been discussed on the mailing list that have not been fixed in this release.
Tue Oct 18 15:10:23 EDT 2011 jcifs-1.3.17
The jcifs.smb.client.soTimeout property, which controls how long the client will wait to read data from a server, was broken in the previous release (1.3.16). Not only was it broken but no SO_TIMEOUT was specified at all meaning if a server became unresponive, JCIFS could hang for an uncontrollably long time. This behavior of this property has been restored.
Additionally, a new jcifs.smb.client.connTimeout has been added which specifies the number of milliseconds that the client will wait to connect to a server (how long it will wait for a response to the TCP SYN). This can be very useful when trying to communicate with many servers in parallel.
Sat Jun 25 12:00:00 EDT 2011 jcifs-1.3.16
This release includes the following minor fixes and improvements:
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JCIFS now uses the InetSocketAddress class to explicitly bind and set the SO_TIMEOUT on client sockets before they are connected. This makes the SO_TIMEOUT effective when the target server socket is not listening and the client OS socket implementation takes a long time for the dropped SYN to timeout. This may significantly reduce resource consumption in applications that use multiple threads to constantly query servers that may not be listening.
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When disconnecting a transport, new clauses have been added to better reset transport state whereas previously transports could get stuck in a disconnected state for unnecessarily long periods of time.
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A new property jcifs.smb.client.ignoreCopyToException has been added. When set to "true" (the default), the SmbFile.copyTo() method will ignore (but log) exceptions trying to copy individual files or directories (such as because of a permissions error). To maintain backward compatibility, the default value of this property is "true" (exceptions are ignored). Setting this property to "false" will cause any exception that occurs trying to copy an individual file or directory to be thrown out of copyTo and abort the copy operation at the point of failure.
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If an authentication exception occurs trying to connect to a server that has multiple IP addresses, JCIFS will not attempt to connect to more than one IP addresses because doing so could result in an account lockout.
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The SID resolver code incorrectly resolved SIDs of an ACE in blocks of at most 10 where it should have used a limit of 64. This performance issue has been fixed.
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JCIFS will not throw the artifical "Access is denied" error if the special NtlmPasswordCredential.ANONYMOUS credential is used explicitly (whereas normally JCIFS will deliberately throw an SmbAuthException if a login results in a guest login or if the anonymous identity is used).
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The NetrServerEnum2 RAP call used incorrect parameter descriptiors which could result in "SmbException: 2320" errors trying to list domains and servers from the local NetBIOS browse service.
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The NTLMSSP AUTHENTICATE_MESSAGE (aka "Type 2 Message") encoding routine incorrectly left out the TargetName field (although this had no effect on CIFS client behavior).
Thu Oct 7 13:36:57 EDT 2010 jcifs-1.3.15
Adjusted locking on DcerpcHandle routines in jcifs.smb.SID which could result in "All pipe instances are busy". This is also believed to reduce occurances of NT_STATUS_TOO_MANY_OPENED_FILES errors (although when resolving SID names excessively, this error can still occur).
Fragmented request PDUs have been implemented.
Thu Feb 11 15:10:26 EST 2010 jcifs-1.3.14
A lock has been added to DcerpcHandle to ensure that the NT_CREATE_ANDX and DCERPC bind are performed together as some pipes will return 'All pipe instances are busy' errors if the client tries to open the same pipe concurrently.
JCIFS will no longer do a NetBIOS Node Status to determine the server hostname as it seems some servers no longer respond to it which causes a long delay on connect.
Tue Jan 5 13:19:39 EDT 2010 jcifs-1.3.13
Locking throughout the transport layer has been rewritten. This should fix the long standing deadlock that has been reported in the past. Doubled size of transient input buffer to accommodate SMB_COM_NEGOTIATE response security blob (as observed with OSX Snow Leopard). A signing issue reading data from an EMC server has been fixed. NTLMSSP logging has been improved.
Fri Aug 14 13:45:57 EDT 2009 jcifs-1.3.12
If NtlmPasswordAuthentication.ANONYMOUS was used, CAP_EXTENDED_SECURITY could be incorrectly turned off resulting in a NullPointerException in SmbComSessionSetupAndX.java. If a DC does not return any domain referrals, a NullPointerException could occur. Both of these NPEs have been fixed.
JCIFS could become confused when connecting to a server that also happened to be a DFS root server. JCIFS will now create separate transports for these two cases.
Tue Jul 21 11:19:39 EDT 2009 jcifs-1.3.11
The domain was incorrectly upper-cased when performing NTLMv2 authentication. It so happened this was harmless to JCIFS but the nTOWFv2 routine indicates that the domain is not supposed to be upper-cased (unlike the username which is).
Wed Jun 3 19:42:58 EDT 2009 jcifs-1.3.10
When re-establishing a session an old UID could be set in the SMB_COM_SESSION_SETUP_ANDX and cause a "The parameter is incorrect" SmbException. This release explicitly sets the uid to 0 before initiating a new session which fixes this error.
Fri May 30 00:40:26 EDT 2009 jcifs-1.3.9
- JCIFS will now iteratively try multiple replicated DFS targets if some are not enabled (whereas previously JCIFS would quit if the first root target was not accessible)
- Fixed "Invalid operation for ????? service" error when querying DFS
- Documented jcifs.smb.client.useExtendedSecurity and that it must be set to false when using Samba 3.0.x
- All instances of UnicodeLittleUnmarked have been changed to UTF-16LE (for platforms like Android)
- SmbFile.copyTo will now copy files larger than 4GB
- The API documentation has been heavily stripped of unnecessary classes
Sat Mar 29 23:13:29 EDT 2009 jcifs-1.3.8
RC4 has been implemented which eliminates the Java 1.5u7 requirement. JCIFS 1.3 should now work with Java 1.4 (as well as 1.2 did anyway).
Thu Mar 12 14:22:47 EDT 2009 jcifs-1.3.7
Share security with Samba 3.0 was broken. This has been fixed.
Wed Mar 11 20:22:46 EDT 2009 jcifs-1.3.5
Stand-alone DFS did not work with an IP address as opposed to a DNS or NetBIOS hostname. This issue has been fixed.
Sun Mar 9 11:46:15 EDT 2009 jcifs-1.3.4
JCIFS 1.3.3 was accidentally compiled with Java 1.5. This release has been compiled with Java 1.4. Note that NTLMv2 still requires Java 1.5 update 7 for RC4.
SMB parameter words were not decoded correctly (which were ultimately related to the fact that the WordCount of the SMB_COM_NT_CREATE_ANDX response is wrong because an extra 16 bytes for "offline files / client side caching (CSC)". Ultimately this caused an error with the SMB_COM_TREE_CONNECT_ANDX response of certain IBM clusters. This should now be fixed.
The status codes and text for NT_STATUS_INVALID_COMPUTER_NAME (0xC0000122) and NT_STATUS_NO_TRUST_SAM_ACCOUNT (0xC000018B) have been added.
Server capabilities in the SMB_COM_NEGOTIATE response were not being read correctly. This issue has been fixed.
The documentation regarding the return value of renameTo has been fixed.
Sun Jan 25 14:31:31 EST 2009 jcifs-1.3.3
If a jcifs.netbios.wins property is not supplied, the default jcifs.resolveOrder is now LMHOSTS,DNS,BCAST whereas previously it was LMHOSTS,BCAST,DNS. This is much more likely to eliminate annoying 6 second timeouts waiting for BCAST queries to timeout.
An "Invalid parameter" error would occur if the RC4 Cipher was not available for NTLMv2. The logic has been adjusted so that the correct error is thrown. Note that RC4 is only available in Java 1.5 update 7 and later. Thus JCIFS 1.3 requires that version or NTLMv2 must be disabled.
The NTLMSSP classes could try to load Cp850 which is not available in the standard JRE. This has been fixed.
Added setLength method to NdrBuffer class.
Mon Dec 22 13:30:39 EST 2008 jcifs-1.3.2
Querying Samba DFS links directly could fail due to a slight difference in Samba v. Windows DFS referrals. This issue has been fixed. Querying Samba DFS roots or paths under DFS links were not affected.
Sat Nov 30 00:32:09 EST 2008 jcifs-1.3.1
The NtlmPasswordAuthentication constructor has been modified to canonicalize the username from DOMAIN\username or username@domain to username and set the domain separately.
The getNTLMv2Response method has been adjusted to permit the targetInfo to be null.
Minor changes to DFS have been applied that claim to prevent errors in certain DFS scenarios.
The NTLM HTTP Filter was broken in 1.3.0. Turning off useExtendedSecurity reportedly fixes the issue.
Note: The semantics of the fourth parameter of getNTLMv2Response has changed.
Sat Oct 25 17:45:51 EDT 2008 jcifs-1.3.0 released
NTLMv2 has been FULLY implemented and is now the default. Signatures without and without various NTLMSSP flags (e.g. NTLMSSP_NEGOTIATE_NTLM2) have been tested with Windows 2003 and Windows 2000.
New default values are:
jcifs.lmCompatibility = 3 jcifs.smb.client.useExtendedSecurity = true
Note: The NTLM HTTP Filter does not and can never support NTLMv2 as it uses the main-in-the-middle technique which is specifically thwarted by factoring the NTLMSSP TargetInformation block into the computed hashes. A proper NTLMv2 HTTP authentication filter would require NETLOGON RPCs (or possibly some kind of Kerberos digest authentication like Heimdal uses).
Sun Oct 19 23:25:45 EDT 2008 jcifs-1.2.25
The DcerpcHandle code to increase the stub size if alloc_hint was greater than stub.length was not being engaged properly which would result in an ArrayIndexOutOfBoundsException if the DCERPC response was larger than 0xffff. This has been fixed.
Disabled decoding of NativeFileSystem field b/c it seems the iSeries implementation sends this field in ASCII even though Unicode is indicated. Fortunately the field is of no interest to anyone so we can simply omit decoding it.
Added check in copyTo to prevent a possible thread lockup when server is disconnected during a copy.
Force SMB_COM_TREE_CONNECT_ANDX service to always be what was passed to the constructor (default is '?????'). IBM iSeries apparently does not like explicitly specifying 'A:' which can occur on reconnect after an soTimeout.
Wed Jul 23 13:35:20 EDT 2008 jcifs-1.2.24
The 2 line change that fixes stand-alond DFS was not in 1.2.23. Now it is.
Sun Jul 20 22:28:40 EDT 2008 jcifs-1.2.23
Recent domain-based DFS proper broke stand-alone DFS. This has been fixed.
Wed Jun 25 20:26:33 EDT 2008 jcifs-1.2.22
The SmbFileInputStream methods will now throw InterruptedIOExceptions where apppropriate whereas previously they would throw SmbExceptions with a root cause of TransportException with a root cause of InterruptedException.
If SmbSession.send() throw an exception it could leave the session in a bad state which could cause "Invalid parameter" exceptions on subsequent requests.
An InterruptedException in jcifs.netbios.NameServiceClient was being caught and ignored. It will now be re-thrown as an IOException so that all threads used with/by JCIFS can be interrupted and caused to exit. Several other similar (albeit less important) InterruptedExceptions were also adjusted.
A jcifs.smb.client.dfs.disabled property has been added to disable domain based DFS so that the client does not try and fail to resolve paths as domain paths in non-domain environments (e.g. on the local machine).
The getSecurity and getShareSecurity methods will now return null if no DACL is present on a file whereas previously it would retrun an empty array. This allows the caller to distinguish between an empty DACL and one that is simply empty.
Wed May 28 22:46:56 EDT 2008 jcifs-1.2.21
An NPE in jcifs.Config was accidentally introduced in 1.2.20. This has been fixed.
Tue May 27 16:06:13 EDT 2008 jcifs-1.2.20
The Dfs cache was not thread safe. This has been fixed. The trusted domains are now looked up with <1C> NetBIOS lookups to speed discovery.
EMC could return "Access denied" for the SMB_COM_FIND_CLOSE2 on a read-only share. A try catch was added to ignore errors for that request since it otherwise has no logical importance. Examining a capture of XP with EMC reveals that no SMB_COM_FIND_CLOSE2 is sent at all.
The read logic could error on the special 0x80000005 status used by named pipes to indicate more data should be read. This caused SmbFile.getShareSecurity() to fail on large ACLs. This issue has been fixed. The getShareSecurity() method would previously fail to resolve more than about 110 SIDs in one call because of a limitation in JCIFS' ability to emit multi-fragment request PDUs. The getShareSecurity() method has been modified to process SIDs in chunks of 64 to work-around this issue.
Sun Apr 6 19:46:47 EDT 2008 jcifs-1.2.19 released
This release adds proper support for domain based DFS roots that are not hosted on domain controllers and eliminates the now-obsolete behavior of building a merged list of shares across hosts. A new NetrDfsEnumEx RPC is used to enumerate DFS roots when listing shares. The equals methods for SmbFile and UniAddress could return true even though the files were not equal. That issue has been fixed. Some SmbComOpenAndX parameters were incorrectly swapped which would cause failure on Windows 98.
Mon Feb 18 23:02:02 EST 2008 jcifs-1.2.18 released
No changes to the code.
Removed docs/.todo.txt.swp that got caught in the tgz by accident.
Wed Feb 6 00:05:42 EST 2008 jcifs-1.2.18e released
The SID.getServerSid() method could fail with NetApp servers due to a "generic" mask values. The mask has been changed to 0x00000001 which corresponds to an LsaOpenPolicy mask of POLICY_VIEW_LOCAL_INFORMATION.
The LsaPolicyHandle class would not throw an error if the LsarOpenPolicy2 call failed. This has been fixed.
The SmbFile constructor could inappropriately URL decode the authority component of SMB URLs.
The NTLM HTTP Filter documentation has been updated.
An Invalid state: 4 error has been fixed.
A NetBIOS name service issue caused by Jetdirect printers has been fixed.
An ArrayIndexOutOfBounds exception in the SmbException class has been fixed.
A NullPointerException in SmbSession.getChallengeForDomain() has been fixed.
A NullPointerException in NbtAddress related to hosts without adequate localhost address configuration has been fixed.
An ArrayIndexOutOfBounds exception could be thrown if a server requires NTLMv2. This exception has been replaced with a more informative one.
The SmbSessionSetup constructor will now compare the challenge and encryptionKey using Arrays.equals instead of == to satisfy unforseen use-cases that otherwise trigger an NT_STATUS_ACCESS_VIOLATION.
If a share was unshared while JCIFS was in the middle of reading files from it, the transport could enter an error state from which it could not immediately recover if the share was restored. A small change to SmbTransport.doRecv() fixes this problem.
Tue Jun 26 16:11:31 EDT 2007
The DCERPC bind did not exactly mimic Windows which uses SMB_COM_{WRITE,READ}_ANDX. We were using TransactNmPipe throughout which could result in an 'Incorrect function' error when querying the LSA on a NetApp server. JCIFS now implements the bind exactly like Windows to help ensure compatibility with other servers.
A minor performance flaw in the DCERPC code was found and fixed.
Wed Jun 20 13:09:10 EDT 2007 jcifs-1.2.14 released
A new SID.getGroupMemberSids() method has been added that will return the local group membership of SID (aka aliases). This release adds the SAMR interface to the dcerpc code with the SamrEnumerateAliasesInDomain RPC and numerous other calls to negotiate the necessary policy handles.
Mon Jan 22 15:26:01 EST 2007 jcifs-1.2.13 released
A new SmbFile.getShareSecurity() method that uses a new MsrpcShareGetInfo/ShareInfo502 RPC has been added. This will return the ACL for a share as opposed to the ACL for the directory shared. See the API documentation for details. Several DFS issues have been identified and fixed. If JCIFS receives a NoRouteToHostException on port 445 it will now try to fallback to port 139. This code has been tested fairly well already. There have been no changes since b4.
Mon Jan 15 15:47:47 EST 2007 jcifs-1.2.13b4 released
When trying to connect to port 445 some environments can generate a NoRouteToHostException as opposed to a ConnectException even though falling back to port 139 would have worked. The SmbTransport class has been modifed to also catch the NoRouteToHostException and retry with port 139.
Mon Jan 8 02:26:56 EST 2007 jcifs-1.2.13b3 released
Two DFS bugs introduced after recent changes have been repaired. The getDfsPath method would return a path with an extra slash (/) if the directory referred to the DFS root. The listFiles methods could return the directory itself as a child. Both issues have been fixed.
Fri Jan 5 16:24:27 EST 2007 jcifs-1.2.13b2 released
The DcerpcHandle.sendrecv() code did not properly buffer fragmented response PDUs. This resulted in an "invalid array conformance" exception in the NDR routines. This error has been fixed.
Thu Jan 4 18:12:34 EST 2007 jcifs-1.2.13b1 released
A new SmbFile.getShareSecurity() method that uses a new MsrpcShareGetInfo/ShareInfo502 RPC has been added. See the API documentation for details. Also, DFS issues have been identified and fixed.
Wed Dec 27 19:15:27 EST 2006 jcifs-1.2.12 released
Just made 1.2.12b2 final.
Thu Dec 21 12:20:14 EST 2006 jcifs-1.2.12b2 released / getSecurity Bugfix
The NtTransQuerySecurityDesc request could specify a data buffer that could be too small for the response. As a result the response was not decoded properly and an error would occur. The response will now be decoded properly if the buffer is too small and the buffer size has been increased from 4096 to 32768.
Thu Dec 14 21:01:46 EST 2006 jcifs-1.2.12b released / DFS Bugfix and SID Adjustments Again
The getSecurity() method did not work over DFS. A very small but potentially significant change has been made to the DFS code. I do not have a sophisticated DFS test environment so please pay special attention to JCIFS with DFS and report any problems to the JCIFS mailing list.
The toString() method of the SID class has been changed back to the old behavior of returning only the numeric SID representation. This was done not only for backward compatibility with previous versions of JCIFS but because conceptually the textual representation of a SID is not it's resolved account name. A new toDisplayString method has been added to return the resolved Windows ACL editor text (as toString() did in the 1.2.11 release). The toSidString() method has been removed. The getDomainName() and getAccountName() methods have not changed.
Sat Dec 9 01:09:43 EST 2006 jcifs-1.2.11 released / SID Class Adjustments
The 1.2.11 release is now final. No serious problems have been reported with the new SID resolution code however some minor adjustments have been made with respect to values returned when a SID has not been resolved (e.g. the associated account was deleted). The SID class API documentation has been updated accordingly.
Wed Nov 29 11:34:01 EST 2006 jcifs-1.2.11b released / SID Resolution
This release significantly expands the SID and ACE classes by using the new MSRPC infrastructure to resolve SIDs to their associated account names. A new SmbFile.getSecurity() method has been added which if called with a boolean value of true will resolve the SIDs returned within the ACE[] array such that SID.toString()/getDomainName()/getAccountName() will return text about the account associated with that SID suitable for display to users (e.g. MYDOM\alice, SYSTEM, etc). Documentation for all associated methods and classes has been added.
Fri Nov 24 11:58:14 EST 2006 jcifs-1.2.10 released / Minor Adjustments
The 1.2.10 release is now final. A NetBIOS name service lookup bug has been fixed in addition to severl other harmless adjustments.
Tue Nov 14 12:32:23 EST 2006 jcifs-1.2.10b released / MSRPC Support, Long Unicode Share Name Enumeration and Critical Bugfixes
This release contains the following new functionality and fixes:
- Long Unicode Share Enumeration - The SmbFile.list* methods will now try to use MSRPC to enumerate shares if the target is a server. If the operation should fail for any reason, the client will fall back to trying the older RAP method. This should permit enumerating shares with names that use charsets other than the negotiated OEM "ASCII" encoding, share names that are longer than 12 characters, and arbirarily large lists of shares.
- MSRPC Support - MSRPC support has been integrated into JCIFS directly. It should now be possible to add new RPCs (AT jobs, SID/group name resolution, service management, regedit, etc) relatively easily with little knowledge of MSRPC protocols. Look at the jcifs/dcerpc/msrpc/MsrpcShareEnum.java class for an example and ask the mailing list for further instructions.
- Apr 24 bugfix - A NullPointerException caused by an error in logic has been fixed.
- May 10 bugfix - The client will now detect if the JRE supports Cp850 and set the default jcifs.encoding to US-ASCII if it does not. This will eliminate some NullPointerExceptions that were occuring as a result.
- A small update about keep-alives has been added to the NTLM HTTP Authentication document.
- Jun 21 bugfix - CLOSE-WAIT sockets left over by read errors have been fixed.
- Jul 19 bugfix - Errors caused by using UnicodeLittle as opposed to UnicodeLittleUnmarked have been fixed by ensuring UnicodeLittleUnmarked is used throughout the codebase.
- Oct 3 bugfix - Invalid state errors from Transport classes have been fixed. It should be safe to interrupt() JCIFS operations now.
- Oct 20 bugfix - Uncontrolled looping due to invalid Transport logic has been fixed.
- Oct 25 bugfix - Logic has been added to make domain controller lookups more robust.
- Oct 27 bugfix - Failure when using SmbFile.renameTo() with jcifs.smb.client.ssnLimit=1 has been fixed.
- Oct 31 bugfix - Endless looping when all WINS servers in a list are unavailable has been fixed.
Note the openFlags used with SmbFile, SmbNamedPipe, and various streams classes have been tweaked. They are now the following:
Flags for SmbFile{In,Out}putStream are: bits meaning 0-15 open flags (e.g. O_RDWR) 16-31 lower 16 bits of access mask shifted up 16 bits
Flags for SmbNamedPipe are: bits meaning 0-7 open flags (e.g. O_RDWR) 8-15 pipe type (e.g. PIPE_TYPE_CALL) 16-31 lower 16 bits of access mask shifted up 16 bits
Tue Apr 4 15:44:43 EDT 2006 jcifs-1.2.9 released / Java 1.5 Compiler Issue
The 1.2.8 release was compiled with Java 1.5.0_06. Under certain conditions this could cause an error: java.lang.LinkageError: ... Unsupported major.minor version 49.0. I have rebuilt the entire package using the compiler I used previously (1.4.2_08).
Fri Mar 24 23:14:35 EST 2006 jcifs-1.2.8 released / Deadlock Fix, ACLs, DFS, NTLM HTTP Filter, and More
There are several significant changes in this release. These include:
o A deadlock could occur if the client tried to logoff and logon at the same instant. This has been fixed. o It was discovered that in at least some cases "preauthentication" did not work properly. A very simple logical error would cause the wrong signing digest to be installed. This has been fixed. o The ACL patch has been integrated. The SmbFile.getSecurity() method is now available. o The jcifs.smb.client.responseTimeout and jcifs.smb.client.soTimeout values have been increased from 10000ms and 15000ms to 30000ms and 35000 respectively. Users with crawler type applications will almost certainly want to reduce these values. o Several logical errors in DFS referral handling have been fixed (still no fix for the mystery preemtive behavior observed by Windows clients). o Documentation has been updated significantly.
Fri Nov 18 17:08:56 EST 2005 jcifs-1.2.7 released / Transport Error, Filter Changes, Integer Overflow, User Contributed Patches, and More
This release consists of the following changes:
o Some debugging printlns left over from the last release have been removed. o Added setContentLength(0) to two other places for the NTLM HTTP Filter. This is required for HTTP 1.0 clients (e.g. Google appliance servers). o The name service code will now properly resolve DNS names that begin with digits. o Several instances of possible integer overflow have been fixed. o A patch for large read and write support has been added to the patches directory. A patch for reading security descriptors has been added to the patches directory. o If a transport was in error due to a connection timeout it could remain in the error state indefinitely. This issue has been fixed.
Fri Oct 7 19:47:53 EDT 2005 jcifs-1.2.6 released / Session Management and Filter Fix
It was discovered that redundant sessions could be created. This problem has been fixed but the fix is to not remove sessions from the list of sessions for a transport which is somewhat of a waste of memory. This will probably need to be revisited. It has been advised that the Filter call setStatus() before setContentLength(0). This change has been implemented.
Fri Sep 30 23:28:51 EDT 2005 jcifs-1.2.5 released / Filter Exceptions, Stressing the Transport Layer, and DFS Deadlock Fixed
This release of the JCIFS client consists of the following changes.
o It was discovered that a flaw in session expiration could cause sessions to expire prematurely. This has been repaired. o If the jcifs.netbios.hostname property is set, the client will communicate using only NetBIOS over port 139. This is required for environments that implement a policy restricting users to logging in from certain computers. o Under stress the client could incorrectly attempt to use the invalid "NULL" transport. This has been fixed. o Filter users could experience exceptions due to using the port 0 rather than the default CIFS port. o The client should now handle partial reads and socket exceptions more gracefully. o Under stress, the DFS referral query could cause the client to deadlock. This has been fixed.
Wed Sep 21 01:53:28 EDT 2005 jcifs-1.2.4 released / Timeout Transport Exception, Bogus Signature Error, and More
A NetBIOS keep-alive message (received after ~10 minutes) would break message processesing with a timedout waiting for response Exception. This has been fixed.
JCIFS would fail to validate responses with a status that is not zero. Assuming we are calculating the verfication signature correctly I can only assume the affected servers choose not to generate the correct signature for error responses (perhaps for DOS reasons). Because JCIFS checked the signature before the message status, an error response would fail with "signature verification failure". This behavior has been changed so that signatures are not verified if the status is non zero.
It was discovered that the new transport (as of 1.2.x) could not cleanly recover from temporary server failure (e.g. a restart). This has been fixed. Methods will still throw Exceptions but moment the server comes back online the client gracefully recover.
Wed Aug 24 13:29:44 EDT 2005 jcifs-1.2.3 released / Port 445 Fixed
A mistake in the 1.2.2 release broke port 445 communication entirely. It has been fixed. The exact error (with a sufficiently high loglevel) was "Invalid payload size: 1".
Sat Aug 20 00:26:11 EDT 2005 jcifs-1.2.2 released / Exception "cannot assign requested address" Fixed, Clusters, NetApp Filer, and More
There have been a number of small fixes. These are:
o The "cannot assign requested address" exception caused by trying to bind the local address 127.0.0.1 has been fixed. o In a cluster environment the NTLM HTTP Filter could fail with "account currently disabled" or "Access denied" errors due to a deserialization issue of "preauthentication" credentials stored in the HttpSession. The initialization of default credentials has been changed however it is not clear that the change will have any effect as I do not have a clustered environment in which to test. o The combination of plain text passwords and Unicode (largely specific to Samba 3) has been fixed. o A bogus debugging statement has been discovered and removed. Who left that in there?! o A Socket.shutdownOutput() call has been added to doDisconnect as it is believed to reduce spurrious RST frames observed when abruptly shutting down transports. These are believed to be harmless but they have been associated with unsightly messages in Samba log files. o The copyTo() method will now check to see if the source path is a child, parent or equal to the destination path and if so throw a Source and destination paths overlap exception. o An additional debugging statement has been added to the NTLM HTTP Filter domain controller interrogation code. o The getDiskFreeSpace call could fail with NetApp Filer. It has been repaired.
Sun Jul 3 23:33:03 EDT 2005 jcifs-1.2.1 released
The SMB signing code was totally broken in the last release. It has been reparied. The setAttributes method did not work on directories. This has been fixed and the masks used to filter setAttributes/getAttributes have been optimized to allow getting and setting all possible attributes based on observed XP behavior. The getType() method would always return TYPE_SHARE if the SmbFiles were obtained through the listFiles() method on a workgroup or server URL. This issue has been fixed - getType() may now return TYPE_PRINTER and TYPE_NAMEDPIPE.
Sun May 22 18:22:32 EDT 2005 jcifs-1.2.0 released
This release is jcifs-1.1.11trans2 with the following modifications.
Named pipes were broken when DCE transactions where added with 1.x. Call, Transact, CreateFile, and DCE named pipe calls should now all work as expected. The NetBIOS name resolution code will now use the last resource record of a name query response if there are more than one. This appears to be more correct in at least one instance (VMWare adapters on my workstation at work are appearing first).
Also note the trans releases below.
Mon May 9 18:49:24 EDT 2005 jcifs-1.1.11trans2 released
Socket exception handling was non-existant and reads would actually not read anything but 0's. These issues and other small issues have been fixed.
Wed May 4 22:31:28 EDT 2005 jcifs-1.1.11trans released
This "transitional" release has all the 1.1.10 and 1.1.11 fixes as well as more work on the transport layer. The last trans release had a silly mid rollover bug. I have also emiminated a deadlock condition. These issues have been fixed. Also the client will not properly try port 445 and fallback to 139 as necessary. This could be stable enough that I might try to promote this to 1.2.0.
Thu Apr 7 23:02:48 EDT 2005 jcifs-1.1.9trans released
This is a 'transitional' or 'transport rewrite' release. It's stock 1.1.9 but the transport layer has been refactored and reduced (actually totally rewritten - SmbTransport.java is less than half the size of it's previous version). It may still not be "correct" because I believe the high-load concurrency issue may have to do with how sessions and trees are created. That is another step that delves into how Principles will be handled so I thought I would release this as is because it seems pretty stable so I thought I would put it out there as a reference point. To give people an insentive to actually use it I have changed the port to 445, applied the share reconnect fix from Darren and the getDiskFreeSpace patch from Thomas. Also if you really need the dial to go to 11, preliminary testing indicates this transport is a few percent faster.
Feb 28 03:09:31 EST 2005 jcifs-1.1.9 released
When multiplexing I/O, if socket buffers fill up such that packets can be read in fragments (i.e. high load), it was possible for the 4 byte NetBIOS header to be read incorrectly resulting in a bogus "unexpected EOF reading netbios session header" exception. This problem has been fixed. Also, some small javadoc updates have been applied.
Thu Feb 10 22:29:12 EST 2005 jcifs-1.1.8 released
The blocked thread bug wasn't quite fixed in the last release. A lookup exception (e.g. caused by an unresponsive domain controller) could leave a thread blocked if many requests are being processed simultaneously. Similarly the fix for the DC lookup code wasn't complete enough to handle the unusual scenario where all DCs are unresponsive. Also, a malfomed NetBIOS name query response could cause the name service thread to exit incorrectly. These issues have been fixed. Finally, the URL handling of smb://@/ (meaning "null" credentials) has been fixed.
Sun Jan 16 17:30:17 EST 2005 jcifs-1.1.7 released
A bug introduced in a recent release that could cause threads to wait indefinately has been fixed. After time many threads could be blocked resulting in wasted resources. The DC lookup code has been modified to gracefully handle WINS returning an empty list (e.g. due to temporary network failure). A simple fix has been applied that premits SMB signatures to work without specifying preauthentication credentials. The getAttributes method will now return 31 bits of attributes whereas previously it would mask off the lower 6 bits that JCIFS actually makes use of. A bug has been fixed that under certain conditions prevented copyTo() from copying entire shares. A try/catch block has been added to copyTo() to permit the copy to continue if an error occurs.
Mon Dec 27 17:53:42 EST 2004 jcifs-1.1.6 released
If a variable length 8 bit encodings such as Big5 is used the NTCreateAndX command could fail. This bug has been fixed. If an SmbFile{Input,Output}Stream was closed, a subsequent operation could cause the file to be reopened. This behavior is now blocked such that operations performed on a stream after it has been closed will generate an IOException. Some transport layer synchronization has been adjusted. A getPrincipal method has been added to SmbFile that will return the NtlmPasswordAuthentication object used to create the file or pipe. The documentation has been updated regarding transparent NTLM authentication in Mozilla, the available method of SmbFileInputStream.
Thu Dec 16 21:57:23 EST 2004 jcifs-1.1.5 released
It was discovered that an ArrayIndexOutOfBoundsException could occur if the list of domain controllers returned by NbtAddress.getAllByName was shorter than the list returned in the previous call (possibly because the WINS query timed out and switched to an alternate WINS server). All NTLM HTTP Authentication Filter users should upgrade to prevent this error. Also, the value of jcifs.netbios.cachePolicy set by the NTLM HTTP Filter if it is not specified has been doubled to 20 minutes. Finally, some log levels have been increased such that running with jcifs.util.loglevel = 3 temporarily is actually reasonable in a production environment (must use loglevel > 3 to see individual SMB messages and loglevel > 5 to get hexdumps).
Tue Dec 7 18:34:35 EST 2004 jcifs-1.1.4 released
Two bugs regarding the upcasing of domain and username fields with LMv2 authentication (used with lmCompatibility = 3) have been fixed. Additionally the firstCalledName/nextCalledName methods changed in 1.1.0 have been changed back to the old behavior. The change was not warranted as it did not emulate Windows behavior.
Tue Nov 30 19:20:57 EST 2004 jcifs-1.1.3 released
A concurrency error was introduced with the getChallengeForDomain code used by the NTLM HTTP Filter. This has been fixed.
Sun Oct 31 00:58:04 EDT 2004 jcifs-1.1.1 released
The jcifs.smb.client.logonShare (and thus the JCIFSACL NTLM HTTP Filter example) did not work. It would not restrict users to those found in the ACL it would permit all authenticated users. This has been fixed.
A bug was discovered and fixed in the named pipe code. If a specific sequence of reads were performed the pipe could become corrupted. This fix is necessary for multi-pdu DCE requests to work.
A small bug in the new NbtAddress.getAllByName method has been repaired. It will now broadcast for a name if a WINS address was not provided.
jcifs-1.1.0 released
The behavior of the firstCalledName/nextCalledName methods has been changed to try SMBSERVER* first, then the NetBIOS hostname, then the 0x20 name from a Node Status. It is pretty universal now that SMBSERVER* rules the day and most servers return failure with the NetBIOS name so this behavior eliminates a round trip during session establishment.
The NbtAddress.getByName method has been implemented. This will return the full list of RDATA for a name query response. Currently I believe only the 0x1C domain lookup actually returns multiple results. Note this is different from getAllByAddress which does a node status.
The socket code in SmbTransport has been modified to open the socket using the transport thread. This permits the caller of the transport to call wait for RESPONSE_TIMEOUT. This is great if your application has a tendency to try to connect to hosts that do not exist. Normally that would take over a minute to timeout. The single threaded SmbCrawler actually performs quite well with the right properties set.
An SmbSession.getChallengeForDomain() method has been added that returns an NtlmChallenge object containing the byte[] challenge and UniAddress of the domain controller from which it came. This method will rotate through a list of at most jcifs.netbios.lookupRespLimit addresses and will only return a challenge for a responsive server. Unresponsive servers will be removed from the list until the jcifs.netbios.cachePolicy has expired. This function is used by the NTLM HTTP Filter to locate suitable domain controllers.
Because of the above rotation there is a greater potential for transports to remain open. Sessions with no activity (this is particularly true with the NTLM HTTP Filter which really only touches the session once when the user is authenticated) will be logged off after jcifs.smb.client.soTimeout.
A read bug that only manafested itself with a certain EMC server has been fixed.
Mon Sep 6 20:44:14 EDT 2004 jcifs-1.0.1 released
The GUEST account fix broke guest access entirely for machines that deliberately want it. So this is the original fix but with the test condition corrected.
Mon Sep 6 14:59:26 EDT 2004 jcifs-1.0.0 released
Other than minor changes in packaging this code is identical to 0.9.8 released 3 days ago. From now one all development will continue in the 2.0 (?) branch so that the 1.x series remains as stable as possible.
Thu Sep 2 18:45:35 EDT 2004 jcifs-0.9.8 released
If the special "GUEST" account is not disabled (almost always is) it is possible for a bogus username to be authenticated successfully. This problem was only partially fixed previously. A clause was incorrectly added that was intended to allow the username "guest" to be authenticated successfully. It is now not possible for "guest" to be authenticated at all.
A log message has been added to the NtlmHttpFilter that will be logged whenever an SmbAuthException is triggered and the jcifs.util.log.loglevel is greater than 1. For example, to enable logging authentication failures with the filter add the following to the filter section in your web.xml.
<init-param>
<param-name>jcifs.util.loglevel</param-name>
<param-value>2</param-value>
</init-param>
An ArrayIndexOutOfBoundsException that could occur if NTLMv2 is used but lmCompatibility was not set to 3 accordingly has been fixed.
Tue Aug 10 21:25:03 EDT 2004 jcifs-0.9.7 released
It was decided that the NTLM HTTP Filter should not set Connection: close headers, a new SmbFile constructor has been added and a rogue debugging statement has been removed.
--8<--
JCIFS
The Java CIFS Client Library
http://jcifs.samba.org
JCIFS is an Open Source client library that implements the CIFS/SMB networking protocol in 100% Java. CIFS is the standard file sharing protocol on the Microsoft Windows platform (e.g. Map Network Drive ...). This client is used extensively in production on large Intranets.
REQUIREMENTS:
JCIFS jar file - http://jcifs.samba.org/src/ Java 1.3 or above - http://java.sun.com/products/
INSTALLATION:
Just add the jar file to you classpath as you would with any other jar. More specifically:
UNIX:
Go to http://jcifs.samba.org and download the latest jar. If you download the tgz archive you also get the source code and javadoc API documentation (see critical properties discussed on the Overview page). Put it someplace reasonable and extract it. For example:
$ gunzip jcifs-1.0.0.tgz $ tar -xvf jcifs-1.0.0.tar
Add the jar to your classpath. There are two ways to do this. One is to explicitly set it on the command line when you run your application like:
$ java -cp myjars/jcifs-1.0.0.jar MyApplication
but a more robust solution is to export it in your ~/.profile or ~/.bash_profile like:
CLASSPATH=$CLASSPATH:/home/produser/myapp/myjars/jcifs-1.0.0.jar export CLASSPATH
WINDOWS:
Go to http://jcifs.samba.org and download the latest jar. If you download the zip archive you also get the source code and javadoc API documentation (see critical properties discussed on the Overview page). Put it someplace reasonable and extract it with something like Winzip.
Add the jar to your classpath. There are two ways to do this. One is to explicitly set it on the command line when you run your application like:
C:> java -cp myjars\jcifs-1.0.0.jar MyApplication
but a more robust solution would be to change your system environment but I'm not confident I can tell you accurately how to do that.
It is also common that the CLASSPATH be specified in a shell script or batch file. See the build.bat batch file that runs the Ant build tool as an example.
USING JCIFS:
In general the public API is extremely simple. The jcifs.smb.SmbFile, jcifs.smb.SmbFileInputStream, and jcifs.smb.SmbFileOutputStream classes are analogous to the java.io.File, java.io.FileInputStream, and java.io.FileOutputStream classes so if you know how to use those it should be obvious how to use jCIFS provided you set any necessary properties(such as WINS) and understand the smb:// URL syntax.
Here's an example to retrieve a file:
import jcifs.smb.*;
jcifs.Config.setProperty( "jcifs.netbios.wins", "192.168.1.230" ); SmbFileInputStream in = new SmbFileInputStream( "smb://dom;user:pass@host/c/My Documents/report.txt" ); byte[] b = new byte[8192]; int n; while(( n = in.read( b )) > 0 ) { System.out.write( b, 0, n ); }
You can also write, rename, list contents of a directory, enumerate shares, communicate with Win32 Named Pipe Servers, ...etc.
The protocol handler for java.net.URL is also in place which means you retrieve files using the URL class as you would with other protocols. For example:
jcifs.Config.registerSmbURLHandler(); //ensure protocol handler is loaded URL url = new URL( "smb://dom;user:pass@host/share/dir/file.doc" ); InputStream in = url.openStream();
This will also work with whatever else uses the URL class internally. For example if you use RMI you can serve class files from an SMB share and use the codebase property:
-Djava.rmi.server.codebase=smb://mymachine/c/download/myapp.jar
There are many example programs in the jcifs_1.0.0/examples/ directory. To execute the Put example you might do:
$ java -cp examples:jcifs-1.0.0.jar -Djcifs.properties=jcifs.prp
Put smb://dom;usr:pass@host/share/dir/file.doc
##########
582K transfered
See the API documentation and supplimentary documents in the docs directory or on the JCIFS website.
BUILDING JCIFS FROM SOURCE:
The Ant build tool is required to build JCIFS:
http://jakarta.apache.org/ant/
After installing Ant just run 'ant' in the JCIFS directory. It should read the build.xml and present a list of targets. To build a new jar after modifying the source for example simply type 'ant jar'.
ACKNOWLEDGEMENTS
Special thanks to Eric Glass for work on NTLM, the NTLM HTTP Authentication Filter, and RPCs. Thanks is also due to the Samba organization and Christopher R. Hertel for starting the JCIFS project. Finally, thanks to users who diagnose problems and provide the critical feedback and solutions that make the Open Source model great.
