Hello,
I'm currently facing this problem and not able to proceed further. Any help or
pointers would be greatly appreciated.
I'm setting up an SSH client with Apache Mina SSHD, to connect to a linux
server via SSH and using key based authentication.
I've generated the key using puttygen
* Public Key
* copied the public key from puttygen UI to the authorized_keys of the
server.
* Private Key - exported private key in 2 ways
* Export the private key from the puttygen menu - Conversions - Export
ssh.com key and saved it to mykey.key
* Clicked on 'Save private key' button on puttygen and saved it to
mykey.ppk
I'm using the following code to parse the keys in my client
Collection<KeyPair> keyPairs =
PuttyKeyUtils.DEFAULT_INSTANCE.loadKeyPairs(null, Paths.get(certFilePath),
FilePasswordProvider.of(certFilePassword));
To the above code -
* If I pass the .ppk file I'm getting the below exception - getting
exception during parsing of the key file
Exception in thread "main" java.io.StreamCorruptedException: Negative block
length requested: -1875473298
at
org.apache.sshd.common.config.keys.loader.putty.PuttyKeyReader.read(PuttyKeyReader.java:72)
at
org.apache.sshd.common.config.keys.loader.putty.PuttyKeyReader.readInt(PuttyKeyReader.java:61)
at
org.apache.sshd.common.config.keys.loader.putty.RSAPuttyKeyDecoder.loadKeyPairs(RSAPuttyKeyDecoder.java:64)
at
org.apache.sshd.common.config.keys.loader.putty.AbstractPuttyKeyDecoder.loadKeyPairs(AbstractPuttyKeyDecoder.java:270)
at
org.apache.sshd.common.config.keys.loader.putty.AbstractPuttyKeyDecoder.loadKeyPairs(AbstractPuttyKeyDecoder.java:259)
at
org.apache.sshd.common.config.keys.loader.putty.AbstractPuttyKeyDecoder.loadKeyPairs(AbstractPuttyKeyDecoder.java:216)
at
org.apache.sshd.common.config.keys.loader.putty.AbstractPuttyKeyDecoder.loadKeyPairs(AbstractPuttyKeyDecoder.java:161)
at
org.apache.sshd.common.config.keys.loader.putty.AbstractPuttyKeyDecoder.loadKeyPairs(AbstractPuttyKeyDecoder.java:129)
at
org.apache.sshd.common.config.keys.loader.KeyPairResourceParser$2.loadKeyPairs(KeyPairResourceParser.java:166)
at
org.apache.sshd.common.config.keys.loader.KeyPairResourceLoader.loadKeyPairs(KeyPairResourceLoader.java:157)
at
org.apache.sshd.common.config.keys.loader.KeyPairResourceLoader.loadKeyPairs(KeyPairResourceLoader.java:148)
at
org.apache.sshd.common.config.keys.loader.KeyPairResourceLoader.loadKeyPairs(KeyPairResourceLoader.java:139)
at
org.apache.sshd.common.config.keys.loader.KeyPairResourceLoader.loadKeyPairs(KeyPairResourceLoader.java:115)
at
org.apache.sshd.common.config.keys.loader.KeyPairResourceLoader.loadKeyPairs(KeyPairResourceLoader.java:90)
at
org.apache.sshd.common.config.keys.loader.KeyPairResourceLoader.loadKeyPairs(KeyPairResourceLoader.java:84)
at
TestMina5keystringWithPwd.listFolderStructure(TestMina5keystringWithPwd.java:96)
at TestMina5keystringWithPwd.main(TestMina5keystringWithPwd.java:46)
* If I pass the .key file, I'm getting this exception ( the load key pairs
returns empty and sshd authentication just fails)
Exception in thread "main" org.apache.sshd.common.SshException: No more
authentication methods available
at
org.apache.sshd.client.session.ClientUserAuthService.tryNext(ClientUserAuthService.java:330)
at
org.apache.sshd.client.session.ClientUserAuthService.processUserAuth(ClientUserAuthService.java:264)
at
org.apache.sshd.client.session.ClientUserAuthService.process(ClientUserAuthService.java:211)
at
org.apache.sshd.common.session.helpers.AbstractSession.doHandleMessage(AbstractSession.java:462)
at
org.apache.sshd.common.session.helpers.AbstractSession.handleMessage(AbstractSession.java:388)
at
org.apache.sshd.common.session.helpers.AbstractSession.decode(AbstractSession.java:1399)
at
org.apache.sshd.common.session.helpers.AbstractSession.messageReceived(AbstractSession.java:345)
at
org.apache.sshd.common.session.helpers.AbstractSessionIoHandler.messageReceived(AbstractSessionIoHandler.java:64)
at
org.apache.sshd.common.io.nio2.Nio2Session.handleReadCycleCompletion(Nio2Session.java:356)
at
org.apache.sshd.common.io.nio2.Nio2Session$1.onCompleted(Nio2Session.java:334)
at
org.apache.sshd.common.io.nio2.Nio2Session$1.onCompleted(Nio2Session.java:331)
at
org.apache.sshd.common.io.nio2.Nio2CompletionHandler.lambda$completed$0(Nio2CompletionHandler.java:38)
at
java.base/java.security.AccessController.doPrivileged(AccessController.java:318)
at
org.apache.sshd.common.io.nio2.Nio2CompletionHandler.completed(Nio2CompletionHandler.java:37)
at java.base/sun.nio.ch.Invoker.invokeUnchecked(Invoker.java:129)
at java.base/sun.nio.ch.Invoker$2.run(Invoker.java:221)
at
java.base/sun.nio.ch.AsynchronousChannelGroupImpl$1.run(AsynchronousChannelGroupImpl.java:113)
at
java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136)
at
java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
- at java.base/java.lang.Thread.run(Thread.java:833)
Pls. let me know the right methods to parse a private key generated from putty
in my sshd client.
Thanks
RK
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