KosSSH Mobile

Android SSH mobile client MVP, Kotlin + Android Views + JSch.

SDK / Build

compileSdk = 37
targetSdk = 37
minSdk = 26
Android Gradle Plugin: 9.4.0
Gradle: 9.6.0
Java: 17
Android Studio: use a version that supports API 37 (Android Studio Panda 3 or newer).

Android 17 / API 37 requires apps targeting API 37+ that connect to LAN devices to declare and request ACCESS_LOCAL_NETWORK at runtime. KosSSH requests it when the user starts an SSH connection.

Features

SSH-2 interactive PTY (xterm-256color)
Password authentication
ANSI SGR basic colors + bold
Custom terminal font size
GitHub Dark theme
CTRL dialog, ESC, TAB and arrow keys
Android software keyboard integration
Scrollback buffer

Security note

The current MVP still disables strict host-key verification in SshClient.kt to simplify initial testing. Do not ship this configuration to production. The next hardening step should add a persistent known-hosts store and explicit host-key verification, followed by encrypted server profiles/private-key storage.

Android 17 note

Android 17 (API 37) adds a runtime local-network permission. For SSH servers on a LAN, the app asks for ACCESS_LOCAL_NETWORK immediately before the connection is opened.