SFTP: Invalid passphrase for key file when using ED25519 keys

[ragavpr]

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Describe the bug / provide steps to reproduce it

Use a ED25519 ssh key to connect without passphrase, built-in SFTP client displays the error mentioning "Invalid passphrase for key file".

Even with a ED25519 key with passphrase, entering the correct passphrase results in the same error message displayed.

(Just using an RSA key currently)

Environment

Acode version: 1.11.1 (957) (f-droid)
Android version: 14
Webview: 135.0.7049.100 (com.google.android.webview)

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If applicable, attach your Acode.log file to this issue.

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[github-actions]

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[ragavpr]

don't close

[quratoop]

I have the same error message

[GonzaloHD]

Does anyone know how to connect ssh using keys? It worked ssh over password but not working with keys. I have tried pasting the private key in the 'Keyfile' field and giving the path to the key but not working.

Thanks!

[bajrangCoder]

Hey @ragavpr,

I’ve emulated your SSH server environment using a container and tested connecting with a key file, everything works. I also tried both with and without a passphrase, and didn’t encounter any issues.

Could you please provide more details or specific steps to reproduce the problem? Alternatively, you might want to double-check your configuration settings (such as port, host, etc.) to ensure everything is correct.

[LouisRed]

Confirmed, in my case the ED25519 keys don't work either with or without a passphrase (even without a passphrase defined I get the error Invalid passphrase for key file).
I've tried with the old RSA keys in PEM format and even these only work without a passphrase, so I've had to limit access to SFTP only to minimize the risks.
I'm using version 11.11.6 (965).

[UnschooledGamer]

@bajrangCoder I confirm the issue (tested on 1.11.6 - 965 Play store build).

Attached the logcat emitted by acode to the system.

In-short system err reports: Ed25519 KeyFactory not available

https://bashupload.com/ke04L/68ca44542d4ab

[UnschooledGamer]

Yesterday, I tried Acode's setup with a plain Java program on Java 21, there ed25519 keys worked fine. Today I'll try with a blank Cordova app or maybe Running a Debugger on Acode.