Как установить KEX на JSch Session при использовании Apache VFS

Question

Я использую Apache VFS 2.1 с JSch 0.1.54 (последние версии сегодня) для загрузки файлов с использованием SFTP.

Система выдает "End of IO Stream Read" при подключении, полный стек:

Caused by: com.jcraft.jsch.JSchException: Session.connect: java.io.IOException: End of IO Stream Read
    at com.jcraft.jsch.Session.connect(Session.java:565)
    at com.jcraft.jsch.Session.connect(Session.java:183)
    at org.apache.commons.vfs2.provider.sftp.SftpClientFactory.createConnection(SftpClientFactory.java:166)

Я нашел возможное решение моей проблемы в этой теме, но она работает напрямую с JSch. Поскольку я использую Apache VFS, я не могу получить доступ к Session напрямую (по крайней мере, я думаю, что не могу).

Но если бы я мог, это выглядело бы так:

session.setConfig("kex", "diffie-hellman-group1-sha1");

Рассматривая реализацию Apache VFS org.apache.commons.vfs2.provider.sftp.SftpClientFactory он не нашел способ установить это свойство.

Как я могу установить эту конфигурацию, используя Apache VFS API?

Обновить

Данные журнала:

22/05/2017 09:27:20 org.apache.commons.vfs2.impl.StandardFileSystemManager info
INFO: Using "D:\Users\TECBMEPI\AppData\Local\Temp\vfs_cache" as temporary files store.
22/05/2017 09:27:20 org.apache.commons.vfs2.provider.sftp.SftpClientFactory log
INFO: Connecting to z1t1brmxpta022 port 22
22/05/2017 09:27:21 org.apache.commons.vfs2.provider.sftp.SftpClientFactory log
INFO: Connection established
22/05/2017 09:27:21 org.apache.commons.vfs2.provider.sftp.SftpClientFactory log
INFO: Remote version string: SSH-2.0-OpenSSH_6.6.1
22/05/2017 09:27:21 org.apache.commons.vfs2.provider.sftp.SftpClientFactory log
INFO: Local version string: SSH-2.0-JSCH-0.1.54
22/05/2017 09:27:21 org.apache.commons.vfs2.provider.sftp.SftpClientFactory log
INFO: CheckCiphers: aes256-ctr,aes192-ctr,aes128-ctr,aes256-cbc,aes192-cbc,aes128-cbc,3des-ctr,arcfour,arcfour128,arcfour256
22/05/2017 09:27:21 org.apache.commons.vfs2.provider.sftp.SftpClientFactory log
INFO: aes256-ctr is not available.
22/05/2017 09:27:21 org.apache.commons.vfs2.provider.sftp.SftpClientFactory log
INFO: aes192-ctr is not available.
22/05/2017 09:27:21 org.apache.commons.vfs2.provider.sftp.SftpClientFactory log
INFO: aes256-cbc is not available.
22/05/2017 09:27:21 org.apache.commons.vfs2.provider.sftp.SftpClientFactory log
INFO: aes192-cbc is not available.
22/05/2017 09:27:21 org.apache.commons.vfs2.provider.sftp.SftpClientFactory log
INFO: CheckKexes: diffie-hellman-group14-sha1,ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521
22/05/2017 09:27:21 org.apache.commons.vfs2.provider.sftp.SftpClientFactory log
INFO: diffie-hellman-group14-sha1 is not available.
22/05/2017 09:27:21 org.apache.commons.vfs2.provider.sftp.SftpClientFactory log
INFO: ecdh-sha2-nistp256 is not available.
22/05/2017 09:27:21 org.apache.commons.vfs2.provider.sftp.SftpClientFactory log
INFO: ecdh-sha2-nistp384 is not available.
22/05/2017 09:27:21 org.apache.commons.vfs2.provider.sftp.SftpClientFactory log
INFO: ecdh-sha2-nistp521 is not available.
22/05/2017 09:27:21 org.apache.commons.vfs2.provider.sftp.SftpClientFactory log
INFO: CheckSignatures: ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521
22/05/2017 09:27:21 org.apache.commons.vfs2.provider.sftp.SftpClientFactory log
INFO: ecdsa-sha2-nistp256 is not available.
22/05/2017 09:27:21 org.apache.commons.vfs2.provider.sftp.SftpClientFactory log
INFO: ecdsa-sha2-nistp384 is not available.
22/05/2017 09:27:21 org.apache.commons.vfs2.provider.sftp.SftpClientFactory log
INFO: ecdsa-sha2-nistp521 is not available.
22/05/2017 09:27:21 org.apache.commons.vfs2.provider.sftp.SftpClientFactory log
INFO: SSH_MSG_KEXINIT sent
22/05/2017 09:27:21 org.apache.commons.vfs2.provider.sftp.SftpClientFactory log
INFO: SSH_MSG_KEXINIT received
22/05/2017 09:27:21 org.apache.commons.vfs2.provider.sftp.SftpClientFactory log
INFO: kex: server: [e-mail],ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group-exchange-sha256,diffie-hellman-group-exchange-sha1,diffie-hellman-group14-sha1,diffie-hellman-group1-sha1
22/05/2017 09:27:21 org.apache.commons.vfs2.provider.sftp.SftpClientFactory log
INFO: kex: server: ssh-rsa,ssh-dss,ecdsa-sha2-nistp256,ssh-ed25519
22/05/2017 09:27:21 org.apache.commons.vfs2.provider.sftp.SftpClientFactory log
INFO: kex: server: aes128-ctr,aes192-ctr,aes256-ctr,arcfour256,arcfour128,[e-mail],aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,arcfour,[e-mail]
22/05/2017 09:27:21 org.apache.commons.vfs2.provider.sftp.SftpClientFactory log
INFO: kex: server: aes128-ctr,aes192-ctr,aes256-ctr,arcfour256,arcfour128,[e-mail],aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,arcfour,[e-mail]
22/05/2017 09:27:21 org.apache.commons.vfs2.provider.sftp.SftpClientFactory log
INFO: kex: server: [e-mail],[e-mail],[e-mail],[e-mail],[e-mail],[e-mail],[e-mail],[e-mail],[e-mail],hmac-md5,hmac-sha1,[e-mail],[e-mail],hmac-sha2-256,hmac-sha2-512,hmac-ripemd160,[e-mail],hmac-sha1-96,hmac-md5-96
22/05/2017 09:27:21 org.apache.commons.vfs2.provider.sftp.SftpClientFactory log
INFO: kex: server: [e-mail],[e-mail],[e-mail],[e-mail],[e-mail],[e-mail],[e-mail],[e-mail],[e-mail],hmac-md5,hmac-sha1,[e-mail],[e-mail],hmac-sha2-256,hmac-sha2-512,hmac-ripemd160,[e-mail],hmac-sha1-96,hmac-md5-96
22/05/2017 09:27:21 org.apache.commons.vfs2.provider.sftp.SftpClientFactory log
INFO: kex: server: none,[e-mail]
22/05/2017 09:27:21 org.apache.commons.vfs2.provider.sftp.SftpClientFactory log
INFO: kex: server: none,[e-mail]
22/05/2017 09:27:21 org.apache.commons.vfs2.provider.sftp.SftpClientFactory log
INFO: kex: server: 
22/05/2017 09:27:21 org.apache.commons.vfs2.provider.sftp.SftpClientFactory log
INFO: kex: server: 
22/05/2017 09:27:21 org.apache.commons.vfs2.provider.sftp.SftpClientFactory log
INFO: kex: client: diffie-hellman-group-exchange-sha256,diffie-hellman-group-exchange-sha1,diffie-hellman-group1-sha1
22/05/2017 09:27:21 org.apache.commons.vfs2.provider.sftp.SftpClientFactory log
INFO: kex: client: ssh-rsa,ssh-dss
22/05/2017 09:27:21 org.apache.commons.vfs2.provider.sftp.SftpClientFactory log
INFO: kex: client: aes128-ctr,aes128-cbc,3des-ctr,3des-cbc,blowfish-cbc
22/05/2017 09:27:21 org.apache.commons.vfs2.provider.sftp.SftpClientFactory log
INFO: kex: client: aes128-ctr,aes128-cbc,3des-ctr,3des-cbc,blowfish-cbc
22/05/2017 09:27:21 org.apache.commons.vfs2.provider.sftp.SftpClientFactory log
INFO: kex: client: hmac-md5,hmac-sha1,hmac-sha2-256,hmac-sha1-96,hmac-md5-96
22/05/2017 09:27:21 org.apache.commons.vfs2.provider.sftp.SftpClientFactory log
INFO: kex: client: hmac-md5,hmac-sha1,hmac-sha2-256,hmac-sha1-96,hmac-md5-96
22/05/2017 09:27:21 org.apache.commons.vfs2.provider.sftp.SftpClientFactory log
INFO: kex: client: none
22/05/2017 09:27:21 org.apache.commons.vfs2.provider.sftp.SftpClientFactory log
INFO: kex: client: none
22/05/2017 09:27:21 org.apache.commons.vfs2.provider.sftp.SftpClientFactory log
INFO: kex: client: 
22/05/2017 09:27:21 org.apache.commons.vfs2.provider.sftp.SftpClientFactory log
INFO: kex: client: 
22/05/2017 09:27:21 org.apache.commons.vfs2.provider.sftp.SftpClientFactory log
INFO: kex: server->client aes128-ctr hmac-md5 none
22/05/2017 09:27:21 org.apache.commons.vfs2.provider.sftp.SftpClientFactory log
INFO: kex: client->server aes128-ctr hmac-md5 none
22/05/2017 09:27:21 org.apache.commons.vfs2.provider.sftp.SftpClientFactory log
INFO: SSH_MSG_KEX_DH_GEX_REQUEST(1024<1024<1024) sent
22/05/2017 09:27:21 org.apache.commons.vfs2.provider.sftp.SftpClientFactory log
INFO: expecting SSH_MSG_KEX_DH_GEX_GROUP
22/05/2017 09:27:21 org.apache.commons.vfs2.provider.sftp.SftpClientFactory log
INFO: Disconnecting from z1t1brmxpta022 port 22

Answer 1

JSch Session наследует настройки от своего JSch пример. И все JSch экземпляры на самом деле совместно используют одну глобальную / статическую хеш-таблицу с настройками.

Так что просто назовите статический JSch.setConfig до SftpClientFactory.createConnection:

JSch.setConfig("kex", "diffie-hellman-group1-sha1");