我下载了一个新的 JSch 0.1.53 library JSch (sftp) 下载任务不再有效。此版本在 session.connect() 函数上失败并抛出错误 Session.connect: java.io.IOException: End of IO Stream Read。
我的旧 jsch.jar(2011-10-06) 在同一台主机上工作正常，也许我缺少新的配置 Prop ？
Session session=null;
ChannelSftp channel=null;
try {
JSch.setLogger(SSHUtil.createJschLogger());
JSch jsch=new JSch();
session=jsch.getSession("myuser", "11.22.33.44", 22);
session.setConfig("StrictHostKeyChecking", "no");
session.setPassword("mypwd");
session.connect(2000); // <-- FAILS HERE
channel = (ChannelSftp)session.openChannel("sftp");
channel.connect(2000);
...
这是一个广泛的 JSch 日志记录，指示发生了什么。
INFO : Connecting to 11.22.33.44 port 22
INFO : Connection established
INFO : Remote version string: SSH-2.0-OpenSSH_6.6.1
INFO : Local version string: SSH-2.0-JSCH-0.1.53
INFO : CheckCiphers: aes256-ctr,aes192-ctr,aes128-ctr,aes256-cbc,aes192-cbc,aes128-cbc,3des-ctr,arcfour,arcfour128,arcfour256
INFO : aes256-ctr is not available.
INFO : aes192-ctr is not available.
INFO : aes256-cbc is not available.
INFO : aes192-cbc is not available.
INFO : CheckKexes: diffie-hellman-group14-sha1,ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521
INFO : diffie-hellman-group14-sha1 is not available.
INFO : ecdh-sha2-nistp256 is not available.
INFO : ecdh-sha2-nistp384 is not available.
INFO : ecdh-sha2-nistp521 is not available.
INFO : CheckSignatures: ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521
INFO : ecdsa-sha2-nistp256 is not available.
INFO : ecdsa-sha2-nistp384 is not available.
INFO : ecdsa-sha2-nistp521 is not available.
INFO : SSH_MSG_KEXINIT sent
INFO : SSH_MSG_KEXINIT received
INFO : kex: server: curve25519-sha256@libssh.org,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
INFO : kex: server: ssh-rsa,ssh-dss,ecdsa-sha2-nistp256,ssh-ed25519
INFO : kex: server: aes128-ctr,aes192-ctr,aes256-ctr,arcfour256,arcfour128,aes128-gcm@openssh.com,aes256-gcm@openssh.com,chacha20-poly1305@openssh.com,aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,arcfour,rijndael-cbc@lysator.liu.se
INFO : kex: server: aes128-ctr,aes192-ctr,aes256-ctr,arcfour256,arcfour128,aes128-gcm@openssh.com,aes256-gcm@openssh.com,chacha20-poly1305@openssh.com,aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,arcfour,rijndael-cbc@lysator.liu.se
INFO : kex: server: hmac-md5-etm@openssh.com,hmac-sha1-etm@openssh.com,umac-64-etm@openssh.com,umac-128-etm@openssh.com,hmac-sha2-256-etm@openssh.com,hmac-sha2-512-etm@openssh.com,hmac-ripemd160-etm@openssh.com,hmac-sha1-96-etm@openssh.com,hmac-md5-96-etm@openssh.com,hmac-md5,hmac-sha1,umac-64@openssh.com,umac-128@openssh.com,hmac-sha2-256,hmac-sha2-512,hmac-ripemd160,hmac-ripemd160@openssh.com,hmac-sha1-96,hmac-md5-96
INFO : kex: server: hmac-md5-etm@openssh.com,hmac-sha1-etm@openssh.com,umac-64-etm@openssh.com,umac-128-etm@openssh.com,hmac-sha2-256-etm@openssh.com,hmac-sha2-512-etm@openssh.com,hmac-ripemd160-etm@openssh.com,hmac-sha1-96-etm@openssh.com,hmac-md5-96-etm@openssh.com,hmac-md5,hmac-sha1,umac-64@openssh.com,umac-128@openssh.com,hmac-sha2-256,hmac-sha2-512,hmac-ripemd160,hmac-ripemd160@openssh.com,hmac-sha1-96,hmac-md5-96
INFO : kex: server: none,zlib@openssh.com
INFO : kex: server: none,zlib@openssh.com
INFO : kex: server:
INFO : kex: server:
INFO : kex: client: diffie-hellman-group-exchange-sha256,diffie-hellman-group-exchange-sha1,diffie-hellman-group1-sha1
INFO : kex: client: ssh-rsa,ssh-dss
INFO : kex: client: aes128-ctr,aes128-cbc,3des-ctr,3des-cbc,blowfish-cbc
INFO : kex: client: aes128-ctr,aes128-cbc,3des-ctr,3des-cbc,blowfish-cbc
INFO : kex: client: hmac-md5,hmac-sha1,hmac-sha2-256,hmac-sha1-96,hmac-md5-96
INFO : kex: client: hmac-md5,hmac-sha1,hmac-sha2-256,hmac-sha1-96,hmac-md5-96
INFO : kex: client: none
INFO : kex: client: none
INFO : kex: client:
INFO : kex: client:
INFO : kex: server->client aes128-ctr hmac-md5 none
INFO : kex: client->server aes128-ctr hmac-md5 none
INFO : SSH_MSG_KEX_DH_GEX_REQUEST(1024<1024<1024) sent
INFO : expecting SSH_MSG_KEX_DH_GEX_GROUP
INFO : Disconnecting from 11.22.33.44 port 22
Exception in thread "main" com.jcraft.jsch.JSchException: Session.connect: java.io.IOException: End of IO Stream Read
at com.jcraft.jsch.Session.connect(Session.java:558)
at com.jcraft.jsch.Session.connect(Session.java:183)
at my.test.DownloadSFTP.main(DownloadSFTP.java:37)
Caused by: java.io.IOException: End of IO Stream Read
at com.jcraft.jsch.IO.getByte(IO.java:84)
at com.jcraft.jsch.Session.read(Session.java:918)
at com.jcraft.jsch.Session.connect(Session.java:323)
我还有一个非常旧的 Jsch.jar (2011-10-06)，下载任务工作正常，这是一个日志。我想升级的一个原因是传输文件的速度非常慢。新版本应该做得更好，我已经阅读过。
INFO : Connecting to 11.22.33.44 port 22
INFO : Connection established
INFO : Remote version string: SSH-2.0-OpenSSH_6.6.1
INFO : Local version string: SSH-2.0-JSCH-0.1.44
INFO : CheckCiphers: aes256-ctr,aes192-ctr,aes128-ctr,aes256-cbc,aes192-cbc,aes128-cbc,3des-ctr,arcfour,arcfour128,arcfour256
INFO : aes256-ctr is not available.
INFO : aes192-ctr is not available.
INFO : aes256-cbc is not available.
INFO : aes192-cbc is not available.
INFO : arcfour256 is not available.
INFO : SSH_MSG_KEXINIT sent
INFO : SSH_MSG_KEXINIT received
INFO : kex: server->client aes128-ctr hmac-md5 none
INFO : kex: client->server aes128-ctr hmac-md5 none
INFO : SSH_MSG_KEXDH_INIT sent
INFO : expecting SSH_MSG_KEXDH_REPLY
INFO : ssh_rsa_verify: signature true
WARN : Permanently added '11.22.33.44' (RSA) to the list of known hosts.
INFO : SSH_MSG_NEWKEYS sent
INFO : SSH_MSG_NEWKEYS received
INFO : SSH_MSG_SERVICE_REQUEST sent
INFO : SSH_MSG_SERVICE_ACCEPT received
INFO : Authentications that can continue: publickey,keyboard-interactive,password
INFO : Next authentication method: publickey
INFO : Authentications that can continue: keyboard-interactive,password
INFO : Next authentication method: keyboard-interactive
INFO : Authentication succeeded (keyboard-interactive).
INFO : Disconnecting from 11.22.33.44 port 22
INFO : Caught an exception, leaving main loop due to socket closed
编辑 我有一个想法在 Maven repository 中回退版本实际上是这个非常新的版本无法正常工作。以前的 jsch-0.1.52.jar 版本工作正常。我尝试联系库开发人员。
这是工作 0.1.52 版本的日志。
INFO : Connecting to 11.22.33.44 port 22
INFO : Connection established
INFO : Remote version string: SSH-2.0-OpenSSH_6.6.1
INFO : Local version string: SSH-2.0-JSCH-0.1.52
INFO : CheckCiphers: aes256-ctr,aes192-ctr,aes128-ctr,aes256-cbc,aes192-cbc,aes128-cbc,3des-ctr,arcfour,arcfour128,arcfour256
INFO : aes256-ctr is not available.
INFO : aes192-ctr is not available.
INFO : aes256-cbc is not available.
INFO : aes192-cbc is not available.
INFO : CheckKexes: diffie-hellman-group14-sha1,ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521
INFO : diffie-hellman-group14-sha1 is not available.
INFO : ecdh-sha2-nistp256 is not available.
INFO : ecdh-sha2-nistp384 is not available.
INFO : ecdh-sha2-nistp521 is not available.
INFO : CheckSignatures: ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521
INFO : ecdsa-sha2-nistp256 is not available.
INFO : ecdsa-sha2-nistp384 is not available.
INFO : ecdsa-sha2-nistp521 is not available.
INFO : SSH_MSG_KEXINIT sent
INFO : SSH_MSG_KEXINIT received
INFO : kex: server: curve25519-sha256@libssh.org,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
INFO : kex: server: ssh-rsa,ssh-dss,ecdsa-sha2-nistp256,ssh-ed25519
INFO : kex: server: aes128-ctr,aes192-ctr,aes256-ctr,arcfour256,arcfour128,aes128-gcm@openssh.com,aes256-gcm@openssh.com,chacha20-poly1305@openssh.com,aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,arcfour,rijndael-cbc@lysator.liu.se
INFO : kex: server: aes128-ctr,aes192-ctr,aes256-ctr,arcfour256,arcfour128,aes128-gcm@openssh.com,aes256-gcm@openssh.com,chacha20-poly1305@openssh.com,aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,arcfour,rijndael-cbc@lysator.liu.se
INFO : kex: server: hmac-md5-etm@openssh.com,hmac-sha1-etm@openssh.com,umac-64-etm@openssh.com,umac-128-etm@openssh.com,hmac-sha2-256-etm@openssh.com,hmac-sha2-512-etm@openssh.com,hmac-ripemd160-etm@openssh.com,hmac-sha1-96-etm@openssh.com,hmac-md5-96-etm@openssh.com,hmac-md5,hmac-sha1,umac-64@openssh.com,umac-128@openssh.com,hmac-sha2-256,hmac-sha2-512,hmac-ripemd160,hmac-ripemd160@openssh.com,hmac-sha1-96,hmac-md5-96
INFO : kex: server: hmac-md5-etm@openssh.com,hmac-sha1-etm@openssh.com,umac-64-etm@openssh.com,umac-128-etm@openssh.com,hmac-sha2-256-etm@openssh.com,hmac-sha2-512-etm@openssh.com,hmac-ripemd160-etm@openssh.com,hmac-sha1-96-etm@openssh.com,hmac-md5-96-etm@openssh.com,hmac-md5,hmac-sha1,umac-64@openssh.com,umac-128@openssh.com,hmac-sha2-256,hmac-sha2-512,hmac-ripemd160,hmac-ripemd160@openssh.com,hmac-sha1-96,hmac-md5-96
INFO : kex: server: none,zlib@openssh.com
INFO : kex: server: none,zlib@openssh.com
INFO : kex: server:
INFO : kex: server:
INFO : kex: client: diffie-hellman-group1-sha1,diffie-hellman-group-exchange-sha1,diffie-hellman-group-exchange-sha256
INFO : kex: client: ssh-rsa,ssh-dss
INFO : kex: client: aes128-ctr,aes128-cbc,3des-ctr,3des-cbc,blowfish-cbc
INFO : kex: client: aes128-ctr,aes128-cbc,3des-ctr,3des-cbc,blowfish-cbc
INFO : kex: client: hmac-md5,hmac-sha1,hmac-sha2-256,hmac-sha1-96,hmac-md5-96
INFO : kex: client: hmac-md5,hmac-sha1,hmac-sha2-256,hmac-sha1-96,hmac-md5-96
INFO : kex: client: none
INFO : kex: client: none
INFO : kex: client:
INFO : kex: client:
INFO : kex: server->client aes128-ctr hmac-md5 none
INFO : kex: client->server aes128-ctr hmac-md5 none
INFO : SSH_MSG_KEXDH_INIT sent
INFO : expecting SSH_MSG_KEXDH_REPLY
INFO : ssh_rsa_verify: signature true
WARN : Permanently added '11.22.33.44' (RSA) to the list of known hosts.
INFO : SSH_MSG_NEWKEYS sent
INFO : SSH_MSG_NEWKEYS received
INFO : SSH_MSG_SERVICE_REQUEST sent
INFO : SSH_MSG_SERVICE_ACCEPT received
INFO : Authentications that can continue: publickey,keyboard-interactive,password
INFO : Next authentication method: publickey
INFO : Authentications that can continue: keyboard-interactive,password
INFO : Next authentication method: keyboard-interactive
INFO : Authentication succeeded (keyboard-interactive).
最佳答案
JSch 0.1.53 支持(并且更喜欢)diffie-hellman-group-exchange-sha256 KEX，服务器也声称支持，所以 JSch 尝试使用它。
出于某种原因，服务器之后会断开您的连接。
为了解决这个问题，强制 JSch 使用 diffie-hellman-group1-sha1 KEX，JSch 0.1.52 更喜欢什么:
session.setConfig("kex", "diffie-hellman-group1-sha1");
关于java - JSch 0.1.53 session.connect() 抛出 "End of IO Stream Read"，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/37280442/
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