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2.5.0.md

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Introduced in version 2.5.0

Major code re-factoring

  • Reception of an SSH_MSG_UNIMPLEMENTED response to a SSH_MSG_GLOBAL_REQUEST is translated internally into same code flow as if an SSH_MSH_REQUEST_FAILURE has been received - see SSHD-968.

  • Server SFTP subsystem internal code dealing with the local files has been delegated to the SftpFileSystemAccessor in order to allow easier hooking into the SFTP subsystem.

    • Resolving a local file path for an SFTP remote one
    • Reading/Writing a file's attribute(s)
    • Creating files links
    • Copying / Renaming / Deleting files

  • SftpVersionSelector is now consulted when client sends initial command (as well as when session is re-negotiated)

  • ScpCommandFactory is also a ShellFactory that can be used to provide a minimalistic shell that is good enough for WinSCP.

  • Rework SFTP streams so that the client asks and receives as much data as possible - see SSHD-979.

Minor code helpers

  • Handling of debug/ignore/unimplemented messages has been split into handleXXX and doInvokeXXXMsgHandler methods where the former validate the messages and deal with the idle timeout, and the latter execute the actual invcation.

  • Added overloaded methods that accept a java.time.Duration specifier for timeout value.

  • The argument representing the SFTP subsystem in invocations to SftpFileSystemAccessor has been enhanced to expose as much of the available functionality as possible.

Behavioral changes and enhancements

  • SSHD-964 - Send SSH_MSG_CHANNEL_EOF when tunnel channel being closed.

  • SSHD-967 - Extra bytes written when SftpRemotePathChannel#transferTo is used.

  • SSHD-968 - Interpret SSH_MSG_UNIMPLEMENTED response to a heartbeat request as a liveness indicator

  • SSHD-970 - transferTo function of SftpRemotePathChannel will loop if count parameter is greater than file size

  • SSHD-972 - Add support for peers using OpenSSH "security key" key types

  • SSHD-977 - Apply consistent logging policy to caught exceptions

  • SSHD-660 - Added support for server-side signed certificate keys

  • SSHD-984 - Utility method to export KeyPair in OpenSSH format

  • SSHD-992 - Provide more hooks into the SFTP server subsystem via SftpFileSystemAccessor

  • SSHD-997 - Fixed OpenSSH private key decoders for RSA and Ed25519

  • SSHD-998 - Take into account SFTP version preference when establishing initial channel

  • SSHD-989 - Read correctly ECDSA key pair from PKCS8 encoded data

  • SSHD-1009 - Provide a minimalistic shell for supporting WinSCP SCP mode.