FullSync / Bugs / #69 sftp connection error

#69 sftp connection error

Milestone: v0.10

Status: open

Owner: nobody

Labels: None

Priority: 5

Updated: 2015-01-07

Created: 2014-12-17

Creator: Akitoyo

Private: No

Hello,

I had an Raspberry Pi running with Samba on it and I used FullSync to sync my files from my PC to my Raspberry Pi, which worked well. Now I switched to a Banana Pi with Bananian (still Debian based) and installed samba with the same config. Everything is working execpt the syncing with FullSync. I always get this error:

net.sourceforge.fullsync.FileSystemException: Nested exception: Could not connect to SFTP server at "sftp://192.168.1.36/".
nested exception:
org.apache.commons.vfs2.FileSystemException: Could not connect to SFTP server at "sftp://192.168.1.36/".
    at org.apache.commons.vfs2.provider.sftp.SftpFileProvider.doCreateFileSystem(SftpFileProvider.java:107)
    at org.apache.commons.vfs2.provider.AbstractOriginatingFileProvider.getFileSystem(AbstractOriginatingFileProvider.java:103)
    at org.apache.commons.vfs2.provider.AbstractOriginatingFileProvider.findFile(AbstractOriginatingFileProvider.java:81)
    at org.apache.commons.vfs2.provider.AbstractOriginatingFileProvider.findFile(AbstractOriginatingFileProvider.java:65)
    at org.apache.commons.vfs2.impl.DefaultFileSystemManager.resolveFile(DefaultFileSystemManager.java:693)
    at org.apache.commons.vfs2.impl.DefaultFileSystemManager.resolveFile(DefaultFileSystemManager.java:621)
    at net.sourceforge.fullsync.fs.connection.CommonsVfsConnection.<init>(CommonsVfsConnection.java:51)
    at net.sourceforge.fullsync.fs.filesystems.SFTPFileSystem.createConnection(SFTPFileSystem.java:100)
    at net.sourceforge.fullsync.FileSystemManager.createConnection(FileSystemManager.java:78)
    at net.sourceforge.fullsync.impl.AbstractTaskGenerator.execute(AbstractTaskGenerator.java:131)
    at net.sourceforge.fullsync.Synchronizer.executeProfile(Synchronizer.java:65)
    at net.sourceforge.fullsync.ui.MainWindow.doRunProfile(MainWindow.java:631)
    at net.sourceforge.fullsync.ui.MainWindow.access$400(MainWindow.java:56)
    at net.sourceforge.fullsync.ui.MainWindow$28.run(MainWindow.java:607)
    at java.lang.Thread.run(Unknown Source)
Caused by: org.apache.commons.vfs2.FileSystemException: Could not connect to SFTP server at "192.168.1.36".
    at org.apache.commons.vfs2.provider.sftp.SftpClientFactory.createConnection(SftpClientFactory.java:230)
    at org.apache.commons.vfs2.provider.sftp.SftpFileProvider.doCreateFileSystem(SftpFileProvider.java:96)
    ... 14 more
Caused by: com.jcraft.jsch.JSchException: Algorithm negotiation fail
    at com.jcraft.jsch.Session.receive_kexinit(Session.java:532)
    at com.jcraft.jsch.Session.connect(Session.java:295)
    at com.jcraft.jsch.Session.connect(Session.java:158)
    at org.apache.commons.vfs2.provider.sftp.SftpClientFactory.createConnection(SftpClientFactory.java:226)
    ... 15 more
net.sourceforge.fullsync.FileSystemException: Nested exception: Could not connect to SFTP server at "sftp://192.168.1.36/".
    at net.sourceforge.fullsync.fs.connection.CommonsVfsConnection.<init>(CommonsVfsConnection.java:55)
    at net.sourceforge.fullsync.fs.filesystems.SFTPFileSystem.createConnection(SFTPFileSystem.java:100)
    at net.sourceforge.fullsync.FileSystemManager.createConnection(FileSystemManager.java:78)
    at net.sourceforge.fullsync.impl.AbstractTaskGenerator.execute(AbstractTaskGenerator.java:131)
    at net.sourceforge.fullsync.Synchronizer.executeProfile(Synchronizer.java:65)
    at net.sourceforge.fullsync.ui.MainWindow.doRunProfile(MainWindow.java:631)
    at net.sourceforge.fullsync.ui.MainWindow.access$400(MainWindow.java:56)
    at net.sourceforge.fullsync.ui.MainWindow$28.run(MainWindow.java:607)
    at java.lang.Thread.run(Unknown Source)

Thank you for your help!

Discussion

Akitoyo - 2014-12-17

Edit: I'm using FullSync V0.10.2 on Windows.

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Christoph - 2014-12-17

Since you are using SFTP your samba config is not relevant here, your SSHD config is.
The real error is: com.jcraft.jsch.JSchException: Algorithm negotiation fail.
Please provide the fullsync.log from C:\Users\<your user name>.config\fullsync.

Br,
Christoph

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Akitoyo - 2014-12-18

Thanks for the fast answer. Here is the fullsync file: http://pastebin.com/Taq5HcL0

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Christoph - 2014-12-18

hmm you probably need to install the "Java Cryptography Extension (JCE) Unlimited Strength Jurisdiction Policy Files" for your java version:

Java 8: http://www.oracle.com/technetwork/java/javase/downloads/jce8-download-2133166.html
Java 7: http://www.oracle.com/technetwork/java/javase/downloads/jce-7-download-432124.html

to install you need to copy the jar files from the zip file into your java installation (something like C:\Program Files (x86)\Java\jre7\lib\security\ )

AFTER EVERY JAVA UPDATE (thank you USA -.-')

then FullSync should be able to connect to your SFTP server

HTH
Christoph

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Akitoyo - 2014-12-20

Thank you! I copied the files from the zip archive to my java installation, overwrote the already existing files. But somehow it doesn't fix the problem :(

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Christoph - 2014-12-22

Please attah a copy of the sshd config file form /etc/ssh/sshd_config form your Banana Pi.

Also it would be interesting which Java version and which Windows version you are using so that I can try on the correct versions.

That would allow me to debug the problem.

Br,
Christoph

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Akitoyo - 2014-12-24

I use Windows 7 Ultimate x64 with Java 8 Update 25. And here is my sshd_config http://pastebin.com/auAbda3h

btw, happy christmas :)

Last edit: Akitoyo 2014-12-24

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Christoph - 2014-12-29

you could add hmac-sha1 to the list of allowed MAC algorithms on the server side:

/etc/ssh/sshd_config:

MACs hmac-sha2-512,hmac-sha2-256,hmac-ripemd160,hmac-sha1

Br,
Christoph

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Akitoyo - 2014-12-30

Connecting works now. But I notice a strange issue: I used root to connect to my Banana Pi and this works when I set the destination path to /, but I can't get out of the home directory (/root) then. My files are located under /storage/, when I set the destination path to /storage/music it creates a the folder under /root/storage/music

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Christoph - 2014-12-31

yes currently FullSync only supports accessing files and folders below the users home directory...

however you can add a symlink to the /storage folder which will then allow you to access the other folder.
example:
ln -s /storage storage

after that you will be able to access the storage folder using the path /storage from whichever user you set this up (that user will need to be able to read / write to /storage of course)

HTH,
Christoph

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Akitoyo - 2015-01-01

I see. Thank you for your help, everything is working now :)

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/etc/ssh/sshd_config: