Termux-app: Error while installing openssh

Created on 5 Jul 2017 · 11Comments · Source: termux/termux-app

apt install openssh fails with

CANNOT LINK EXECUTABLE "ssh-keygen": cannot locate symbol "OpenSSL_add_all_algorithms" referenced by "/system/bin/ssh-keygen"...
Aborted 
CANNOT LINK EXECUTABLE "ssh-keygen": cannot locate symbol "OpenSSL_add_all_algorithms" referenced by "/system/bin/ssh-keygen"...
Aborted 
CANNOT LINK EXECUTABLE "ssh-keygen": cannot locate symbol "OpenSSL_add_all_algorithms" referenced by "/system/bin/ssh-keygen"...
Aborted 
CANNOT LINK EXECUTABLE "ssh-keygen": cannot locate symbol "OpenSSL_add_all_algorithms" referenced by "/system/bin/ssh-keygen"...
Aborted

Source

ChillarAnand

Most helpful comment

@azulkipli You need to copy the content of id_rsa.pub from your computer and add it to the device's ~/.ssh/authorized_keys

Grimler91 on 12 Oct 2017

👍3

All 11 comments

Did you do something weird with your path. What is the output of echo $PATH?

Neo-Oli on 5 Jul 2017

From adb shell

athene:/ # echo $PATH
/sbin:/vendor/bin:/system/sbin:/system/bin:/system/xbin:/data/data/com.termux/files/usr/bin

ChillarAnand on 5 Jul 2017

The problem seems to be that you have /system/bin in your path, so you're using the wrong ssh-keygen.
Try resetting your path to the default in termux.

Neo-Oli on 5 Jul 2017

That fixed it. Thanks for the help @Neo-Oli

I have created authorized hosts file with ssh keys. However ssh is failing is it is not able to find keys.

adb shell 'echo $HOME'
/

130|athene:/ # ls -la .ssh
total 4
drwx------  2 root root   0 2017-07-05 16:14 .
drwxr-xr-x 22 root root   0 2017-07-05 14:36 ..
-rw-r--r--  1 root root 395 2017-07-05 16:14 authorized_keys

athene:/ # logcat -s 'syslog:*'                                                                                                                      
07-05 16:35:56.426 29837 29837 I syslog  : sshd - Server listening on :: port 22.
07-05 16:35:56.427 29837 29837 I syslog  : sshd - Server listening on 0.0.0.0 port 22.
07-05 16:36:02.759 29850 29850 I syslog  : /data/data/com.termux/files/usr/bin/sshd - Connection closed by authenticating user root 192.168.1.11 port 36404

ssh [email protected] -v

debug1: Authentications that can continue: publickey,keyboard-interactive
debug1: Trying private key: /home/chillaranand/.ssh/id_dsa
debug1: Trying private key: /home/chillaranand/.ssh/id_ecdsa
debug1: Trying private key: /home/chillaranand/.ssh/id_ed25519
debug1: Next authentication method: keyboard-interactive
debug1: Authentications that can continue: publickey,keyboard-interactive
debug1: No more authentication methods to try.
Permission denied (publickey,keyboard-interactive).

ChillarAnand on 5 Jul 2017

chmod 600 ~/.ssh/authorized_keys

It won't work with the permissions you have for security reasons.

ShawnMilo on 5 Jul 2017

@ShawnMilo I set permissions correctly. Still it is throwing same error.

chmod 700 $HOME/.ssh
chmod 600 $HOME/.ssh/authorized_keys

ChillarAnand on 5 Jul 2017

I have enabled PasswordAuthentication in /data/data/com.termux/files/usr/etc/ssh/sshd_config and restarted sshd. Anybody knows the default password for ssh?

ChillarAnand on 12 Jul 2017

syslog showed permission errors. After fixing those, its is working. Thanks for the help.

ChillarAnand on 12 Jul 2017

PasswordAuthentication is not supported