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Support newer sftp protocol versions #593

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tionis opened this issue Sep 3, 2024 · 1 comment

tionis commented Sep 3, 2024

Even though v3 is the most widely supported one, the most up-to-date specification is v6: https://www.sftp.net/specification

Collaborator

puellanivis commented Sep 4, 2024

Yes, we are aware of the newer versions, example: https://github.com/pkg/sftp/blob/master/internal/encoding/ssh/filexfer/fx.go#L60-L61

The problem is that basically no one supports the newer versions, particularly not even OpenSSH: https://github.com/openssh/openssh-portable/blob/13cc78d016b67a74a67f1c97c7c348084cd9212c/sftp.h#L86-L96

Reading this section of the Wikipedia page is pretty informative: https://en.wikipedia.org/wiki/SSH_File_Transfer_Protocol#History_and_development

We’re considering in v2 of the API how we could provide a better ability for people to implement later versions if they need it.

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