Broken transport; encountered EOF when upgrading to 0.35.0, works fine in 0.32.0

Question

Broken transport; encountered EOF when upgrading to 0.35.0, works fine in 0.32.0

basejump opened this issue 10 months ago · comments

Connecting to a site works with 0.32.0 but fails with following messages when upgrading to 0.35.0
we are making the connection with a standard ssh-rsa key and a username.
We turned on debug and ran the test and added what we got back for both versions.
Let me know if there is anything else I can provide or if there is some configuration that would be needed to make the newer version work.

debug when using 0.35.0

2023-07-31 12:17:54.971 INFO  [] n.s.sshj.transport.random.JCERandom.<init> (48) - Creating new SecureRandom.
2023-07-31 12:17:54.971 DEBUG [] n.s.sshj.transport.random.JCERandom.<init> (51) - Random creation took 0 ms
2023-07-31 12:17:55.005 DEBUG [] net.schmizz.sshj.DefaultConfig.initCipherFactories (226) - Available cipher factories: [chacha20-poly1305@openssh.com, aes128-cbc, aes128-ctr, aes192-cbc, aes192-ctr, aes256-cbc, aes256-ctr, aes128-gcm@openssh.com, aes256-gcm@openssh.com, blowfish-cbc, blowfish-ctr, cast128-cbc, cast128-ctr, idea-cbc, idea-ctr, serpent128-cbc, serpent128-ctr, serpent192-cbc, serpent192-ctr, serpent256-cbc, serpent256-ctr, 3des-cbc, 3des-ctr, twofish128-cbc, twofish128-ctr, twofish192-cbc, twofish192-ctr, twofish256-cbc, twofish256-ctr, twofish-cbc, arcfour, arcfour128, arcfour256]
2023-07-31 12:17:55.074 INFO  [] net.schmizz.sshj.transport.TransportImpl.sendClientIdent (209) - Client identity string: SSH-2.0-SSHJ_0.35.0
2023-07-31 12:17:55.126 INFO  [] net.schmizz.sshj.transport.TransportImpl.init (162) - Server identity string: SSH-2.0-Axway.Gateway
2023-07-31 12:17:55.127 DEBUG [] net.schmizz.sshj.SSHClient.onConnect (814) - Initiating Key Exchange for new connection
2023-07-31 12:17:55.127 DEBUG [] net.schmizz.concurrent.Promise.deliver (78) - Setting <<kex done>> to `null`
2023-07-31 12:17:55.128 DEBUG [] net.schmizz.sshj.transport.KeyExchanger.sendKexInit (172) - Sending SSH_MSG_KEXINIT
2023-07-31 12:17:55.130 DEBUG [] net.schmizz.concurrent.Promise.deliver (78) - Setting <<kexinit sent>> to `SOME`
2023-07-31 12:17:55.130 DEBUG [] net.schmizz.concurrent.Promise.tryRetrieve (164) - Awaiting <<kex done>>
2023-07-31 12:17:55.155 DEBUG [] net.schmizz.sshj.transport.KeyExchanger.handle (373) - Received SSH_MSG_KEXINIT
2023-07-31 12:17:55.156 DEBUG [] net.schmizz.sshj.transport.KeyExchanger.gotKexInit (234) - Negotiated algorithms: [ kex=diffie-hellman-group-exchange-sha256; sig=ssh-rsa; c2sCipher=aes128-cbc; s2cCipher=aes128-cbc; c2sMAC=hmac-sha1; s2cMAC=hmac-sha1; c2sComp=none; s2cComp=none;  ]
2023-07-31 12:17:55.168 DEBUG [] n.schmizz.sshj.transport.kex.DHGexSHA256.init (48) - Sending KEX_DH_GEX_REQUEST
2023-07-31 12:17:55.296 DEBUG [] net.schmizz.sshj.transport.KeyExchanger.handle (386) - Received kex followup data
2023-07-31 12:17:55.296 DEBUG [] n.schmizz.sshj.transport.kex.DHGexSHA256.next (54) - Got message KEXDH_31
2023-07-31 12:17:55.297 DEBUG [] n.schmizz.sshj.transport.kex.DHGexSHA256.parseGexGroup (112) - Received server p bitlength 4104
2023-07-31 12:17:55.466 DEBUG [] n.schmizz.sshj.transport.kex.DHGexSHA256.parseGexGroup (114) - Sending KEX_DH_GEX_INIT
2023-07-31 12:17:56.203 DEBUG [] net.schmizz.sshj.transport.KeyExchanger.handle (386) - Received kex followup data
2023-07-31 12:17:56.203 DEBUG [] n.schmizz.sshj.transport.kex.DHGexSHA256.next (54) - Got message KEX_DH_GEX_REPLY
2023-07-31 12:17:56.383 DEBUG [] net.schmizz.sshj.transport.KeyExchanger.verifyHost (205) - Trying to verify host key with net.schmizz.sshj.transport.verification.PromiscuousVerifier@3b88131f
2023-07-31 12:17:56.383 DEBUG [] net.schmizz.sshj.transport.KeyExchanger.sendNewKeys (191) - Sending SSH_MSG_NEWKEYS
2023-07-31 12:17:56.384 DEBUG [] net.schmizz.sshj.transport.KeyExchanger.handle (401) - Received SSH_MSG_NEWKEYS
2023-07-31 12:17:56.385 DEBUG [] net.schmizz.concurrent.Promise.deliver (78) - Setting <<kexinit sent>> to `null`
2023-07-31 12:17:56.386 DEBUG [] net.schmizz.concurrent.Promise.deliver (78) - Setting <<kex done>> to `SOME`
2023-07-31 12:17:56.386 DEBUG [] net.schmizz.sshj.SSHClient.doKex (831) - Key exchange took 1.259 seconds
2023-07-31 12:17:56.386 DEBUG [] net.schmizz.sshj.SSHClient.authPublickey (387) - Attempting to load key from: ./testing-ssh-rsa
2023-07-31 12:17:56.391 DEBUG [] net.schmizz.concurrent.Promise.deliver (78) - Setting <<service accept>> to `null`
2023-07-31 12:17:56.391 DEBUG [] net.schmizz.sshj.transport.TransportImpl.sendServiceRequest (349) - Sending SSH_MSG_SERVICE_REQUEST for ssh-userauth
2023-07-31 12:17:56.391 DEBUG [] net.schmizz.concurrent.Promise.tryRetrieve (164) - Awaiting <<service accept>>
2023-07-31 12:17:56.604 DEBUG [] net.schmizz.sshj.transport.TransportImpl.setService (322) - Setting active service to ssh-userauth
2023-07-31 12:17:56.605 DEBUG [] net.schmizz.concurrent.Promise.deliver (78) - Setting <<service accept>> to `SOME`
2023-07-31 12:17:56.605 DEBUG [] net.schmizz.concurrent.Promise.deliver (78) - Setting <<authenticated>> to `null`
2023-07-31 12:17:56.606 DEBUG [] net.schmizz.sshj.userauth.UserAuthImpl.authenticate (72) - Trying `publickey` auth...
2023-07-31 12:17:56.606 DEBUG [] n.s.sshj.userauth.method.AuthPublickey.buildReq (61) - Attempting authentication using com.hierynomus.sshj.userauth.keyprovider.OpenSSHKeyV1KeyFile@1ce6a9bd
2023-07-31 12:17:56.607 INFO  [] c.h.s.u.keyprovider.OpenSSHKeyV1KeyFile.readUnencrypted (241) - Read key type: ssh-rsa
2023-07-31 12:17:56.613 DEBUG [] net.schmizz.concurrent.Promise.tryRetrieve (164) - Awaiting <<authenticated>>
2023-07-31 12:17:56.669 ERROR [] net.schmizz.sshj.transport.TransportImpl.die (590) - Dying because - Broken transport; encountered EOF
net.schmizz.sshj.transport.TransportException: Broken transport; encountered EOF
	at net.schmizz.sshj.transport.Reader.run(Reader.java:58)
2023-07-31 12:17:56.669 INFO  [] net.schmizz.sshj.transport.TransportImpl.notifyDisconnect (187) - Disconnected - UNKNOWN
2023-07-31 12:17:56.669 DEBUG [] net.schmizz.sshj.transport.KeyExchanger.notifyError (415) - Got notified of net.schmizz.sshj.transport.TransportException: Broken transport; encountered EOF
2023-07-31 12:17:56.669 DEBUG [] net.schmizz.sshj.userauth.UserAuthImpl.notifyError (57) - Notified of net.schmizz.sshj.transport.TransportException: Broken transport; encountered EOF
2023-07-31 12:17:56.669 DEBUG [] net.schmizz.sshj.transport.TransportImpl.setService (322) - Setting active service to null-service
2023-07-31 12:17:56.670 ERROR [] net.schmizz.concurrent.Promise.tryRetrieve (174) - <<authenticated>> woke to: net.schmizz.sshj.userauth.UserAuthException: Broken transport; encountered EOF
2023-07-31 12:17:56.670 DEBUG [] net.schmizz.concurrent.Promise.deliver (78) - Setting <<transport close>> to `SOME`
2023-07-31 12:17:56.670 DEBUG [] net.schmizz.sshj.transport.Reader.run (70) - Stopping

Exhausted available authentication methods
net.schmizz.sshj.userauth.UserAuthException: Exhausted available authentication methods
	at app//net.schmizz.sshj.SSHClient.auth(SSHClient.java:230)
	at app//net.schmizz.sshj.SSHClient.authPublickey(SSHClient.java:345)
	at app//net.schmizz.sshj.SSHClient.authPublickey(SSHClient.java:393)
	at app//yakworks.ssh.SftpUtils.getSshClient(SftpUtils.groovy:40)
	at app//nine.banks.sftp.WellsFargoSftpSmokeTest.getSession(WellsFargoSftpSmokeTest.groovy:39)
	at app//nine.banks.sftp.WellsFargoSftpSmokeTest.setup(WellsFargoSftpSmokeTest.groovy:44)
Caused by: net.schmizz.sshj.userauth.UserAuthException: Broken transport; encountered EOF
	at app//net.schmizz.sshj.userauth.UserAuthException$1.chain(UserAuthException.java:33)
	at app//net.schmizz.sshj.userauth.UserAuthException$1.chain(UserAuthException.java:26)
	at app//net.schmizz.concurrent.Promise.deliverError(Promise.java:95)
	at app//net.schmizz.sshj.userauth.UserAuthImpl.notifyError(UserAuthImpl.java:157)
	at app//net.schmizz.sshj.transport.TransportImpl.die(TransportImpl.java:598)
	at app//net.schmizz.sshj.transport.Reader.run(Reader.java:66)
Caused by: net.schmizz.sshj.transport.TransportException: Broken transport; encountered EOF
	at app//net.schmizz.sshj.transport.Reader.run(Reader.java:58)

debug when using 0.32.0 which works

2023-07-31 12:21:24.936 INFO  [] n.s.sshj.transport.random.JCERandom.<init> (48) - Creating new SecureRandom.
2023-07-31 12:21:24.936 DEBUG [] n.s.sshj.transport.random.JCERandom.<init> (51) - Random creation took 0 ms
2023-07-31 12:21:24.975 DEBUG [] net.schmizz.sshj.DefaultConfig.initCipherFactories (229) - Available cipher factories: [chacha20-poly1305@openssh.com, aes128-cbc, aes128-ctr, aes192-cbc, aes192-ctr, aes256-cbc, aes256-ctr, aes128-gcm@openssh.com, aes256-gcm@openssh.com, blowfish-cbc, blowfish-ctr, cast128-cbc, cast128-ctr, idea-cbc, idea-ctr, serpent128-cbc, serpent128-ctr, serpent192-cbc, serpent192-ctr, serpent256-cbc, serpent256-ctr, 3des-cbc, 3des-ctr, twofish128-cbc, twofish128-ctr, twofish192-cbc, twofish192-ctr, twofish256-cbc, twofish256-ctr, twofish-cbc, arcfour, arcfour128, arcfour256]
2023-07-31 12:21:25.115 INFO  [] net.schmizz.sshj.transport.TransportImpl.sendClientIdent (198) - Client identity string: SSH-2.0-SSHJ_0.32.0
2023-07-31 12:21:25.168 INFO  [] net.schmizz.sshj.transport.TransportImpl.init (162) - Server identity string: SSH-2.0-Axway.Gateway
2023-07-31 12:21:25.169 DEBUG [] net.schmizz.concurrent.Promise.deliver (78) - Setting <<kex done>> to `null`
2023-07-31 12:21:25.169 DEBUG [] net.schmizz.sshj.transport.KeyExchanger.sendKexInit (172) - Sending SSH_MSG_KEXINIT
2023-07-31 12:21:25.173 DEBUG [] net.schmizz.concurrent.Promise.deliver (78) - Setting <<kexinit sent>> to `SOME`
2023-07-31 12:21:25.174 DEBUG [] net.schmizz.concurrent.Promise.tryRetrieve (164) - Awaiting <<kex done>>
2023-07-31 12:21:25.202 DEBUG [] net.schmizz.sshj.transport.KeyExchanger.handle (374) - Received SSH_MSG_KEXINIT
2023-07-31 12:21:25.203 DEBUG [] net.schmizz.sshj.transport.KeyExchanger.gotKexInit (234) - Negotiated algorithms: [ kex=diffie-hellman-group-exchange-sha256; sig=ssh-rsa; c2sCipher=aes128-cbc; s2cCipher=aes128-cbc; c2sMAC=hmac-sha1; s2cMAC=hmac-sha1; c2sComp=none; s2cComp=none; rsaSHA2Support=false ]
2023-07-31 12:21:25.222 DEBUG [] n.schmizz.sshj.transport.kex.DHGexSHA256.init (48) - Sending KEX_DH_GEX_REQUEST
2023-07-31 12:21:25.410 DEBUG [] net.schmizz.sshj.transport.KeyExchanger.handle (387) - Received kex followup data
2023-07-31 12:21:25.411 DEBUG [] n.schmizz.sshj.transport.kex.DHGexSHA256.next (54) - Got message KEXDH_31
2023-07-31 12:21:25.415 DEBUG [] n.schmizz.sshj.transport.kex.DHGexSHA256.parseGexGroup (112) - Received server p bitlength 4104
2023-07-31 12:21:25.622 DEBUG [] n.schmizz.sshj.transport.kex.DHGexSHA256.parseGexGroup (114) - Sending KEX_DH_GEX_INIT
2023-07-31 12:21:26.528 DEBUG [] net.schmizz.sshj.transport.KeyExchanger.handle (387) - Received kex followup data
2023-07-31 12:21:26.529 DEBUG [] n.schmizz.sshj.transport.kex.DHGexSHA256.next (54) - Got message KEX_DH_GEX_REPLY
2023-07-31 12:21:26.716 DEBUG [] net.schmizz.sshj.transport.KeyExchanger.verifyHost (205) - Trying to verify host key with net.schmizz.sshj.transport.verification.PromiscuousVerifier@3d9f587d
2023-07-31 12:21:26.717 DEBUG [] net.schmizz.sshj.transport.KeyExchanger.sendNewKeys (191) - Sending SSH_MSG_NEWKEYS
2023-07-31 12:21:26.717 DEBUG [] net.schmizz.sshj.transport.KeyExchanger.handle (402) - Received SSH_MSG_NEWKEYS
2023-07-31 12:21:26.719 DEBUG [] net.schmizz.concurrent.Promise.deliver (78) - Setting <<kexinit sent>> to `null`
2023-07-31 12:21:26.719 DEBUG [] net.schmizz.concurrent.Promise.deliver (78) - Setting <<kex done>> to `SOME`
2023-07-31 12:21:26.719 DEBUG [] net.schmizz.sshj.SSHClient.doKex (807) - Key exchange took 1.55 seconds
2023-07-31 12:21:26.719 DEBUG [] net.schmizz.sshj.SSHClient.authPublickey (384) - Attempting to load key from: /Users/basejump/github/9ci/domain9/build/vault/bot/9cibot-ssh-rsa
2023-07-31 12:21:26.725 DEBUG [] net.schmizz.concurrent.Promise.deliver (78) - Setting <<service accept>> to `null`
2023-07-31 12:21:26.725 DEBUG [] net.schmizz.sshj.transport.TransportImpl.sendServiceRequest (328) - Sending SSH_MSG_SERVICE_REQUEST for ssh-userauth
2023-07-31 12:21:26.726 DEBUG [] net.schmizz.concurrent.Promise.tryRetrieve (164) - Awaiting <<service accept>>
2023-07-31 12:21:26.942 DEBUG [] net.schmizz.sshj.transport.TransportImpl.setService (301) - Setting active service to ssh-userauth
2023-07-31 12:21:26.942 DEBUG [] net.schmizz.concurrent.Promise.deliver (78) - Setting <<service accept>> to `SOME`
2023-07-31 12:21:26.943 DEBUG [] net.schmizz.concurrent.Promise.deliver (78) - Setting <<authenticated>> to `null`
2023-07-31 12:21:26.943 DEBUG [] net.schmizz.sshj.userauth.UserAuthImpl.authenticate (72) - Trying `publickey` auth...
2023-07-31 12:21:26.943 DEBUG [] n.s.sshj.userauth.method.AuthPublickey.buildReq (61) - Attempting authentication using com.hierynomus.sshj.userauth.keyprovider.OpenSSHKeyV1KeyFile@1013871e
2023-07-31 12:21:26.944 INFO  [] c.h.s.u.keyprovider.OpenSSHKeyV1KeyFile.readUnencrypted (236) - Read key type: ssh-rsa
2023-07-31 12:21:26.948 DEBUG [] net.schmizz.concurrent.Promise.tryRetrieve (164) - Awaiting <<authenticated>>
2023-07-31 12:21:27.037 DEBUG [] net.schmizz.sshj.userauth.UserAuthImpl.handle (141) - Asking `publickey` method to handle USERAUTH_60 packet
2023-07-31 12:21:27.038 DEBUG [] n.s.sshj.userauth.method.AuthPublickey.sendSignedReq (73) - Key acceptable, sending signed request
2023-07-31 12:21:27.038 DEBUG [] n.s.sshj.userauth.method.AuthPublickey.buildReq (61) - Attempting authentication using com.hierynomus.sshj.userauth.keyprovider.OpenSSHKeyV1KeyFile@1013871e
2023-07-31 12:21:27.234 DEBUG [] net.schmizz.sshj.transport.TransportImpl.setService (301) - Setting active service to ssh-connection
2023-07-31 12:21:27.234 DEBUG [] net.schmizz.concurrent.Promise.deliver (78) - Setting <<authenticated>> to `true`
2023-07-31 12:21:27.235 DEBUG [] net.schmizz.sshj.userauth.UserAuthImpl.authenticate (77) - `publickey` auth successful
2023-07-31 12:21:27.248 DEBUG [] n.schmizz.sshj.connection.ConnectionImpl.attach (73) - Attaching `session` channel (#0)
2023-07-31 12:21:27.248 DEBUG [] net.schmizz.concurrent.Promise.tryRetrieve (164) - Awaiting <<chan#0 / open>>
2023-07-31 12:21:27.301 DEBUG [] n.s.s.c.channel.direct.SessionChannel.init (108) - Initialized - < session channel: id=0, recipient=0, localWin=[winSize=2097152], remoteWin=[winSize=65536] >
2023-07-31 12:21:27.301 DEBUG [] net.schmizz.concurrent.Promise.deliver (78) - Setting <<chan#0 / open>> to `SOME`
2023-07-31 12:21:27.301 INFO  [] n.s.s.c.channel.direct.SessionChannel.startSubsystem (187) - Will request `sftp` subsystem
2023-07-31 12:21:27.302 DEBUG [] n.s.s.c.channel.direct.SessionChannel.sendChannelRequest (378) - Sending channel request for `subsystem`
2023-07-31 12:21:27.302 DEBUG [] net.schmizz.concurrent.Promise.tryRetrieve (164) - Awaiting <<chan#0 / chanreq for subsystem>>
2023-07-31 12:21:27.362 DEBUG [] net.schmizz.concurrent.Promise.deliver (78) - Setting <<chan#0 / chanreq for subsystem>> to `SOME`
2023-07-31 12:21:27.364 DEBUG [] n.s.s.connection.channel.Window$Remote.consume (63) - Consuming by 9 down to 65527
2023-07-31 12:21:27.429 DEBUG [] n.s.sshj.connection.channel.Window$Local.consume (63) - Consuming by 9 down to 2097143
2023-07-31 12:21:27.429 DEBUG [] net.schmizz.sshj.sftp.SFTPEngine.init (91) - Server version 3
2023-07-31 12:21:27.439 DEBUG [] net.schmizz.sshj.sftp.SFTPEngine.request (137) - Sending Request{1;OPENDIR}
2023-07-31 12:21:27.439 DEBUG [] n.s.s.connection.channel.Window$Remote.consume (63) - Consuming by 14 down to 65513
2023-07-31 12:21:27.439 DEBUG [] net.schmizz.concurrent.Promise.tryRetrieve (164) - Awaiting <<sftp / 1>>
2023-07-31 12:21:27.500 DEBUG [] n.s.sshj.connection.channel.Window$Local.consume (63) - Consuming by 14 down to 2097129
2023-07-31 12:21:27.502 DEBUG [] net.schmizz.sshj.sftp.PacketReader.handle (101) - Received HANDLE packet
2023-07-31 12:21:27.502 DEBUG [] net.schmizz.concurrent.Promise.deliver (78) - Setting <<sftp / 1>> to `Buffer [rpos=5, wpos=10, size=10]`
2023-07-31 12:21:27.503 DEBUG [] net.schmizz.sshj.sftp.SFTPEngine.request (137) - Sending Request{2;READDIR}
2023-07-31 12:21:27.503 DEBUG [] n.s.s.connection.channel.Window$Remote.consume (63) - Consuming by 14 down to 65499
2023-07-31 12:21:27.503 DEBUG [] net.schmizz.concurrent.Promise.tryRetrieve (164) - Awaiting <<sftp / 2>>
2023-07-31 12:21:27.565 DEBUG [] n.s.sshj.connection.channel.Window$Local.consume (63) - Consuming by 405 down to 2096724
2023-07-31 12:21:27.567 DEBUG [] net.schmizz.sshj.sftp.PacketReader.handle (101) - Received NAME packet
2023-07-31 12:21:27.567 DEBUG [] net.schmizz.concurrent.Promise.deliver (78) - Setting <<sftp / 2>> to `Buffer [rpos=5, wpos=401, size=401]`
2023-07-31 12:21:27.569 DEBUG [] net.schmizz.sshj.sftp.SFTPEngine.request (137) - Sending Request{3;READDIR}
2023-07-31 12:21:27.570 DEBUG [] n.s.s.connection.channel.Window$Remote.consume (63) - Consuming by 14 down to 65485
2023-07-31 12:21:27.570 DEBUG [] net.schmizz.concurrent.Promise.tryRetrieve (164) - Awaiting <<sftp / 3>>
2023-07-31 12:21:27.624 DEBUG [] net.schmizz.sshj.sftp.PacketReader.handle (101) - Received STATUS packet
2023-07-31 12:21:27.624 DEBUG [] n.s.sshj.connection.channel.Window$Local.consume (63) - Consuming by 34 down to 2096690
2023-07-31 12:21:27.624 DEBUG [] net.schmizz.concurrent.Promise.deliver (78) - Setting <<sftp / 3>> to `Buffer [rpos=5, wpos=30, size=30]`
2023-07-31 12:21:27.625 DEBUG [] net.schmizz.sshj.sftp.RemoteDirectory.close (52) - Closing `RemoteResource{.}`
2023-07-31 12:21:27.625 DEBUG [] net.schmizz.sshj.sftp.SFTPEngine.request (137) - Sending Request{4;CLOSE}
2023-07-31 12:21:27.626 DEBUG [] n.s.s.connection.channel.Window$Remote.consume (63) - Consuming by 14 down to 65471
2023-07-31 12:21:27.626 DEBUG [] net.schmizz.concurrent.Promise.tryRetrieve (164) - Awaiting <<sftp / 4>>
2023-07-31 12:21:27.680 DEBUG [] n.s.sshj.connection.channel.Window$Local.consume (63) - Consuming by 30 down to 2096660
2023-07-31 12:21:27.680 DEBUG [] net.schmizz.sshj.sftp.PacketReader.handle (101) - Received STATUS packet
2023-07-31 12:21:27.680 DEBUG [] net.schmizz.concurrent.Promise.deliver (78) - Setting <<sftp / 4>> to `Buffer [rpos=5, wpos=26, size=26]`
2023-07-31 12:21:27.685 DEBUG [] n.s.s.c.channel.direct.SessionChannel.sendClose (288) - Sending close
2023-07-31 12:21:27.685 DEBUG [] net.schmizz.concurrent.Promise.tryRetrieve (164) - Awaiting <<chan#0 / close>>
2023-07-31 12:21:27.740 DEBUG [] n.s.s.c.channel.direct.SessionChannel.gotClose (221) - Got close
2023-07-31 12:21:27.741 DEBUG [] n.schmizz.sshj.connection.ConnectionImpl.forget (89) - Forgetting `session` channel (#0)
2023-07-31 12:21:27.742 DEBUG [] net.schmizz.concurrent.Promise.deliver (78) - Setting <<chan#0 / close>> to `SOME`
2023-07-31 12:21:27.744 INFO  [] net.schmizz.sshj.transport.TransportImpl.notifyDisconnect (176) - Disconnected - BY_APPLICATION
2023-07-31 12:21:27.745 DEBUG [] n.schmizz.sshj.connection.ConnectionImpl.notifyError (57) - Notified of net.schmizz.sshj.transport.TransportException: [BY_APPLICATION] Disconnected
2023-07-31 12:21:27.746 DEBUG [] net.schmizz.sshj.transport.TransportImpl.sendDisconnect (439) - Sending SSH_MSG_DISCONNECT: reason=[BY_APPLICATION], msg=[]
2023-07-31 12:21:27.746 DEBUG [] net.schmizz.sshj.transport.Reader.run (70) - Stopping
2023-07-31 12:21:27.746 DEBUG [] net.schmizz.concurrent.Promise.deliver (78) - Setting <<transport close>> to `SOME`

Jeroen van Erp · Answer 1 · Tue Aug 01 2023 20:29:11 GMT+0800 (China Standard Time)

There have been some changes to RSA key exchange handling, which may be causing SSHJ to try newer RSA signatures before the older deprecated approach.

The Config class has a method named prioritizeSshRsaKeyAlgorithm() that you could try to see if that resolves the issue with version 0.35.

Joshua Burnett · Answer 2 · Tue Aug 08 2023 23:46:05 GMT+0800 (China Standard Time)

this worked.

DefaultConfig config = new DefaultConfig();
config.prioritizeSshRsaKeyAlgorithm();
SSHClient ssh = new SSHClient(config);

David Kocher · Answer 3 · Sat Aug 12 2023 04:05:28 GMT+0800 (China Standard Time)

Relates to #740.