Hello, I am using dropbear on Android phones to connect to each other. I am using a cross-compiled single file binary of dropbear for Android. I am using the "command=“ option in authorized_keys and also using the public key for auth. The server when started from within my Android app is not allowing the ssh connection to be successful. However, if I run the server from an adb shell, the connection is successful and my command from authorized_keys is executed like a charm.
Dropbear version: Dropbear v2017.75 My phone: Nokia 8.1 (Android 10) Command to start the server: libdropbear.so -vFp 21210 -r .ssh/id_ecdsa Location of authorized_keys: /data/user/0/com.batnpad.appname.debug/.ssh/authorized_keys (Permission is 600) Command used on the client side: ./libdbclient.so -yp 21210 -I 30 -i ../.ssh/id_ecdsa u0_a340@192.168.1.142 Output on the client side in case of failure: ./libdbclient.so: Connection to u0_a340@192.168.1.142:21210 exited: Remote closed the connection I checked the verbose server logs in both cases. To keep it concise, I will only paste the lines with a difference: Log from server started from within the app: TRACE (10836) 34.244358: enter checkfileperm(/data/user/0/) TRACE (10836) 34.244452: leave checkfileperm: success TRACE (10836) 34.244458: enter checkfileperm(/data/user/0//.ssh) TRACE (10836) 34.244469: leave checkfileperm: success TRACE (10836) 34.244473: enter checkfileperm(/data/user/0//.ssh/authorized_keys) TRACE (10836) 34.244485: leave checkfileperm: success TRACE (10836) 34.244490: leave checkpubkeyperms Log from server started from an adb shell: TRACE (10481) 8.908210: enter checkfileperm(/data/user/0/com.batnpad.appname.debug) TRACE (10481) 8.908333: leave checkfileperm: success TRACE (10481) 8.908346: enter checkfileperm(/data/user/0/com.batnpad.appname.debug/.ssh) TRACE (10481) 8.908359: leave checkfileperm: success TRACE (10481) 8.908381: enter checkfileperm(/data/user/0/com.batnpad.appname.debug/.ssh/authorized_keys) TRACE (10481) 8.908396: leave checkfileperm: success TRACE (10481) 8.908402: leave checkpubkeyperms I have been trying to solve this for days. Any pointers will be of great help. Thanks.
