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As Windows 2012R2 no longer supports the SMB 1 protocol without some registry hacks has anyone had any success working with SMB shares in Java where only SMB 2.1 or SMB 3 are supported?

The JCIFS library is apparently SMB 1 only so it is out. I see that Microsoft have a Java library for Azure but this appears to be utilising services rather than SMB.

Lii
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Moth
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5 Answers5

15

I found this package that can work with SMB2 and SMB3, named smbj Take a look at this: https://github.com/hierynomus/smbj

Michael Biniashvili
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    Please don't just post a link to some off-site resource as an answer. At least demonstrate [how it solves the problem](http://meta.stackoverflow.com/a/251605) in the answer itself. – Baum mit Augen May 23 '17 at 09:59
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    I switched from JCIFS to smbj and wrote a wrapper for it (Contains the most used functions in a file/directory oriented way): https://github.com/swaechter/smbjwrapper – swaechter Nov 29 '18 at 10:49
7

Expanding on @Breakidi answer, I've just used hierynomus/smbj v0.2.0 on Android and added SMB2 support. It claims support for both SMB2 and SMB3 although classes reference only SMB2 versions, not sure, maybe it is irrelevant.

Testing

I've tested it against box running SMB2 open in one case and then both SMB2 and SMB3 open in another. I could not disable SMB2 and test SMB3 alone though.

Bouncycastle/Spongycastle

There was a need to use Spongycastle in my case (most likely because of Android) as required MD4 dependency was missing from classpath. I've used it within my class that connects to SMB:

import org.spongycastle.jce.provider.BouncyCastleProvider;
import java.security.Security;
<...>
static {
    Security.addProvider(new BouncyCastleProvider());
}

Uploading file

Make sure you set correct flags when call openFile on a DiskShare (by looking into source code off course):

// required imports
import com.hierynomus.msdtyp.AccessMask;
import com.hierynomus.msfscc.FileAttributes;
import com.hierynomus.mssmb2.SMB2CreateDisposition;
import com.hierynomus.mssmb2.SMB2CreateOptions;
import com.hierynomus.mssmb2.SMB2ShareAccess;
import com.hierynomus.smbj.SMBClient;
import com.hierynomus.smbj.SmbConfig;
import com.hierynomus.smbj.auth.AuthenticationContext;
import com.hierynomus.smbj.common.SMBApiException;
import com.hierynomus.smbj.connection.Connection;
import com.hierynomus.smbj.session.Session;
import com.hierynomus.smbj.share.DiskShare;
import com.hierynomus.smbj.share.File;
import java.io.IOException;
import java.io.OutputStream;
import java.util.Arrays;
import java.util.HashSet;
...
// connection params
String sambaDomain = null; // can be null
String sambaUsername = "iamuploader";
String sambaPass = "mysecret";
String sambaIP = "192.168.1.236";
String sambaSharedPath = "sharedfolder";

...
// upload method
// usage: upload("file/whithin/folder.txt", fileBytes);
public void upload(String filename, byte[] bytes) throws IOException {

    SmbConfig cfg = SmbConfig.builder().build();
    SMBClient client = new SMBClient(cfg);
    Connection connection = client.connect(sambaIP);
    Session session = connection.authenticate(new AuthenticationContext(sambaUsername, sambaPass.toCharArray(), sambaDomain));
    DiskShare share = (DiskShare) session.connectShare(sambaSharedPath);

    // this is com.hierynomus.smbj.share.File !
    File f = null;
    int idx = filename.lastIndexOf("/");

    // if file is in folder(s), create them first
    if(idx > -1) {
        String folder = filename.substring(0, idx);
        try {
            if(!share.folderExists(folder)) share.mkdir(folder);
        } catch (SMBApiException ex) {
            throw new IOException(ex);
        }

    }

    // I am creating file with flag FILE_CREATE, which will throw if file exists already
    if(!share.fileExists(filename)){
        f = share.openFile(filename,
                new HashSet<>(Arrays.asList(AccessMask.GENERIC_ALL)),
                new HashSet<>(Arrays.asList(FileAttributes.FILE_ATTRIBUTE_NORMAL)),
                SMB2ShareAccess.ALL,
                SMB2CreateDisposition.FILE_CREATE,
                new HashSet<>(Arrays.asList(SMB2CreateOptions.FILE_DIRECTORY_FILE))
        );
    }

    if(f == null) return null;

    OutputStream os = f.getOutputStream();
    os.write(bytes);
    os.close();
}
Ivar
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4

Visuality Systems is currently developing JNQ which is Java-based SMB with as far as 3.1.1 support. Since the requirement contains a backwards support for Java 1.4, the development goes slowly. SMB client will be available somewhere in the coming summer, server will come later.

Mark Rabinovich
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1

when use hierynomus/smbj v0.3.0, I get the exception like "ClassNotFoundException: sun.security.provider.MD4", then i use the follow code to resolve the problem.

SmbConfig cfg = SmbConfig.builder().
                withMultiProtocolNegotiate(true).
                withSecurityProvider(new JceSecurityProvider(new BouncyCastleProvider())).
                build();
SMBClient client = new SMBClient(cfg);
alexander.polomodov
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Vasil
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    You can better use the `BCSecurityProvider` which uses BouncyCastle directly. – Hiery Nomus Oct 13 '17 at 10:59
  • if some one want to get share folders, for now smbj does not suport this feature, then you can use smbj-rpc on github, when you find problem, you can look at the issue, maybe it will help you.(such as win10 smb2) – Vasil Oct 26 '17 at 09:23
  • for now smbj does not support smb3 just smb2, maybe future will – Vasil Oct 26 '17 at 09:24
  • or if you using doman name when connect has some error, you maybe look at this https://stackoverflow.com/questions/3184463/host-is-unresolved-in-lan . good luck – Vasil Oct 27 '17 at 05:57
  • when you upload file to multilevel directory, use like this "parentdir\test.jpg" not "parentdir/test.jpg" – Vasil Oct 27 '17 at 06:28
0

There is an other library that support SMB2: https://github.com/AgNO3/jcifs-ng

Soma Básthy
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