SSHelper (The free Android SSH Server Application)
This is the XDA SSHelper support thread for the only completely open
source, transparent, free and ad-less SSH daemon/server Application for
Android. Sure there are plenty other Android SSH server apps out there, but
you can try to find one that is both free, without any ads, where all
the sources are clearly available and documented, where their developer
can be reached and contacted, and that has its own website.
To make things even better, I decided to start this thread in honor of,
and with permission by the main developer and scientist, Paul Lutus.
He's been developing software for NASA since the 80's and wrote one of
the first word processors for Apple-I. You can read all about it on his
Another important reason for this thread is that SSHelper was developed
under CyanogenMod which is an AOSP ROM. This may cause many unexpected
side effects since those devices behave very differently from stock
(out-of-the-box) firmwares. While AOSP ROM often adds many new features,
they also remove many other OEM features that are mostly unknown or not
understood by the ROM builders/developers. So basing your app
development on a custom ROM is really begging for support trouble. This
will become even more apparent with the recent moves by Godzilla to make
AOS SELinux Enforced by default.
If you just need an SSH server right away, you can download the APK
directly from his website HERE or indirectly from Google Play.
The minimum required AOS is Honeycomb 3.2 / API 13, and the
current version is: 6.3 (04.28.2014).
SSHelper is much more than just an SSH server, it also offers:
- full Rsync support
- full sshd_config file support
- full shell profile support
- HTTP server
- SCP server
- SFTP server
- Detailed Debug info (via App and web server)
- Detailed Logcat view
- Terminal Shell with OTG keyboard
- and a full Busybox implementation
However, as you can imagine, the more supported features, the more
potential for problems. As the developer is a wild-life adventurer he's
not constantly sitting in front of his computer waiting to solve other
peoples problems, but often extremely isolated in the Alaskan wilderness
or in a small boat in the middle of the pacific.
That's why we need this thread. Other users may be able to help you if
they have had similar or previous problems. And if those problems aren't
solvable here, hopefully Paul will be able to have an occasional look,
insight and update.
However, since this application is based on OpenSSL / OpenSSH and so on,
the best place to find solutions and ask general SSH related questions
is on any of the 5 StackExchange related Q&A sites:
You should also have a good read at the SSHelper main support site.
So before posting here, search there first!
Required Android Permissions
( in: ../SSHelper/AndroidManifest.xml )
These will probably need to be updated in order to solve some issuesCode:android.permission.ACCESS_NETWORK_STATE android.permission.ACCESS_SUPERUSER android.permission.ACCESS_WIFI_STATE android.permission.BLUETOOTH android.permission.CHANGE_WIFI_MULTICAST_STATE android.permission.CHANGE_WIFI_STATE android.permission.INTERNET android.permission.RECEIVE_BOOT_COMPLETED android.permission.WRITE_EXTERNAL_STORAGE
when used on devices running SEAndoid in Enforced mode.
Application File Locations
All the SSHelper related files are located in and below the base directory at:
The APK AssetsCode:bin Here are all the binary assets, such as busybox and sshd etc. cache databases dev etc files home Your home directory when using SSH lib Symlinked to: /data/app-lib/com.arachnoid.sshelper-1 tmp var
Installed BinariesCode:busybox_gz rsync_gz scp_gz sftp_gz ssh_gz ssh_keygen_gz ssh_keyscan_gz sshd_gz favicon.ico profile server_page.html sshd_config
From Busybox we have:
In addition to that, in the $SSHELPER/bin we find:Code:BusyBox v1.21.0 (2014-04-01 22:29:02 PDT) multi-call binary. BusyBox is copyrighted by many authors between 1998-2012. Licensed under GPLv2. See source distribution for detailed copyright notices. Usage: busybox [function [arguments]...] or: busybox --list[-full] or: busybox --install [-s] [DIR] or: function [arguments]... BusyBox is a multi-call binary that combines many common Unix utilities into a single executable. Most people will create a link to busybox for each function they wish to use and BusyBox will act like whatever it was invoked as. Currently defined functions: [, [[, ar, arp, ash, awk, base64, basename, bbconfig, beep, blkid, blockdev, bootchartd, bunzip2, bzcat, bzip2, cal, cat, catv, chat, chattr, chgrp, chmod, chown, chpst, chroot, chrt, chvt, cksum, clear, cmp, comm, cp, cpio, crond, crontab, cttyhack, cut, dc, dd, deallocvt, depmod, devmem, diff, dirname, dmesg, dnsd, dnsdomainname, dos2unix, dpkg, dpkg-deb, du, dumpkmap, echo, ed, egrep, env, envdir, envuidgid, expand, expr, fakeidentd, false, fbset, fbsplash, fdflush, fdformat, fdisk, fgconsole, fgrep, find, findfs, flash_lock, flash_unlock, flashcp, flock, fold, free, freeramdisk, fsync, ftpd, ftpget, ftpput, fuser, getopt, grep, gunzip, gzip, halt, hd, hdparm, head, hexdump, hostname, httpd, hwclock, ifconfig, ifdown, ifup, init, inotifyd, insmod, install, iostat, ip, ipaddr, ipcalc, iplink, iproute, iprule, iptunnel, klogd, less, linuxrc, ln, loadkmap, losetup, lpd, lpq, lpr, ls, lsattr, lsmod, lsof, lspci, lsusb, lzcat, lzma, lzop, lzopcat, makedevs, makemime, man, md5sum, mdev, mesg, mkdir, mkfifo, mknod, mkswap, mktemp, modinfo, modprobe, more, mpstat, mv, nbd-client, nc, netstat, nice, nmeter, nohup, od, openvt, patch, pidof, ping, pipe_progress, pmap, popmaildir, poweroff, powertop, printenv, printf, ps, pscan, pstree, pwd, pwdx, raidautorun, rdev, readlink, readprofile, realpath, reboot, reformime, renice, reset, resize, rev, rm, rmdir, rmmod, route, rpm, rpm2cpio, rtcwake, run-parts, runsv, runsvdir, rx, script, scriptreplay, sed, sendmail, seq, setconsole, setkeycodes, setlogcons, setserial, setsid, setuidgid, sha1sum, sha256sum, sha3sum, sha512sum, showkey, sleep, smemcap, softlimit, sort, split, start-stop-daemon, strings, stty, sum, sv, svlogd, switch_root, sync, sysctl, tac, tail, tar, tcpsvd, tee, telnet, telnetd, test, tftp, tftpd, time, timeout, top, touch, tr, traceroute, true, ttysize, tunctl, tune2fs, udpsvd, uname, uncompress, unexpand, uniq, unix2dos, unlzma, unlzop, unxz, unzip, uptime, usleep, uudecode, uuencode, vconfig, vi, volname, watch, wc, wget, which, whoami, whois, xargs, xz, xzcat, yes, zcat
References and Resources:Code:rsync scp sftp ssh ssh-keygen ssh-keyscan sshelper_sshd