hpr3638 :: Ken drops a bear on his android phone
How to enable sftp using a sshd server on android/lineageos
Hosted by Ken Fallon on Wednesday 2022-07-13 is flagged as Clean and is released under a CC-BY-SA license.
Tags: SimpleSSHD,SSH2,dropbear,android,lineageos,primitive ftpd.
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I have previously used https://f-droid.org/en/packages/org.primftpd/ to enable sftp to my android phone
For more information on How to mount remote storage using sshfs, see hpr1944 :: sshfs - Secure SHell FileSystem
Also you will need to know about some useful tools for working with Android Devices hpr3515 :: ADB and scrcpy
I found https://www.galexander.org/software/simplesshd/
SimpleSSHD is an SSH2 server based on dropbear that supports scp, sftp, and rsync. It only supports public-key based authentication (no password/interactive auth except for bootstrapping). It does not use root, which means it must listen on a port over 1024 (defaults to port 2222).
Install from fdroid
https://f-droid.org/en/packages/org.galexander.sshd
before
laptop$ adb root laptop$ adb shell phone: # cd /data/user/0/org.galexander.sshd/files phone:/data/user/0/org.galexander.sshd/files # ls -al total 56 drwxrwx--x 2 u0_a268 u0_a268 4096 2022-06-17 12:06 . drwx------ 6 u0_a268 u0_a268 4096 2022-06-17 11:59 .. -rw-rw-rw- 1 root root 490 2022-06-17 12:05 authorized_keys -rw------- 1 u0_a268 u0_a268 475 2022-06-17 12:07 dropbear.err -rw------- 1 u0_a268 u0_a268 650 2022-06-17 12:03 dropbear.err.old -rw------- 1 u0_a268 u0_a268 6 2022-06-17 12:06 dropbear.pid -rw------- 1 u0_a268 u0_a268 83 2022-06-17 12:03 dropbear_ed25519_host_key
Commands to run
phone:/data/user/0/org.galexander.sshd/files # restorecon -F authorized_keys SELinux: Loaded file_contexts phone:/data/user/0/org.galexander.sshd/files # chmod 600 authorized_keys phone:/data/user/0/org.galexander.sshd/files # chown u0_a268:u0_a268 authorized_keys
after
phone:/data/user/0/org.galexander.sshd/files # ls -al total 56 drwxrwx--x 2 u0_a268 u0_a268 4096 2022-06-17 12:06 . drwx------ 6 u0_a268 u0_a268 4096 2022-06-17 11:59 .. -rw------- 1 u0_a268 u0_a268 490 2022-06-17 12:05 authorized_keys -rw------- 1 u0_a268 u0_a268 475 2022-06-17 12:07 dropbear.err -rw------- 1 u0_a268 u0_a268 650 2022-06-17 12:03 dropbear.err.old -rw------- 1 u0_a268 u0_a268 6 2022-06-17 12:06 dropbear.pid -rw------- 1 u0_a268 u0_a268 83 2022-06-17 12:03 dropbear_ed25519_host_key laptop$ sshfs -p 2222 192.168.1.123: /mnt/phone/
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