[VFS] sftp problems

[Jeff Barrett <JB...@sawyermedia.com>]

Howdy,

I'm trying to get the sftp provider to work, but I'm running into problems.

I'm using jdk1.3, jce1.2.2, vfs HEAD, and I've tried jsch 0.1.2 (specified in vfs project.xml) and 0.1.5 (the most current).  I also tried using jce from bouncycastle (http://www.bouncycastle.org) to no avail.

I've tried connecting to two different linux servers both running ssh2 is installed on both machines and I'm able to do a commandline connection using sftp, so I know that works.

I'm trying to get the sftp test case to pass, and that's where the errors are coming from.  Line 198 in ProviderTestSuite tries to check and see if the test url specified exists.  Eventually this leads to line 108 in SftpFileSystem, which basically calls Session.connect() on an Sftp Session.  Everything seems peachy until line 52 in com.jcraft.jsch.jce.DH which looks like so:

myKpairGen=KeyPairGenerator.getInstance("DH");

This is apparently a java.security.KeyPairGenerator.  This barfs with this message: "DH KeyPairGenerator not available".  

This exception then leads to other down stream issues resulting in a NPE:

java.lang.NullPointerException
	at com.jcraft.jsch.jce.DH.getE(DH.java:58)
	at com.jcraft.jsch.jce.DHG1.init(DHG1.java:114)
	at com.jcraft.jsch.Session.receive_kexinit(Session.java:379)
	at com.jcraft.jsch.Session.connect(Session.java:246)
	at org.apache.commons.vfs.provider.sftp.SftpFileSystem.getChannel(SftpFileSystem.java:108)
	at org.apache.commons.vfs.provider.sftp.SftpFileObject.statSelf(SftpFileObject.java:138)
	at org.apache.commons.vfs.provider.sftp.SftpFileObject.doGetType(SftpFileObject.java:106)
	at org.apache.commons.vfs.provider.AbstractFileObject.attach(AbstractFileObject.java:919)
	at org.apache.commons.vfs.provider.AbstractFileObject.exists(AbstractFileObject.java:372)
	at org.apache.commons.vfs.test.ProviderTestSuite.setUp(ProviderTestSuite.java:198)
	at junit.extensions.TestSetup$1.protect(TestSetup.java:18)
	at junit.framework.TestResult.runProtected(TestResult.java:124)
	at junit.extensions.TestSetup.run(TestSetup.java:23)
	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:392)
	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:276)
	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:167)

Has anyone come across this?  I peeked at the KeyPairGenerator.getInstance() docs, and it looks like DH isn't a valid option.  This doesn't seem to be an issue for lots of other people though, a google search reveals lots of code on the net with the line: KeyPairGenerator.getInstance("DH").

thanks,
+jeff

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