GSocket

GSocket (opens new window)

---

• RHEL/CentOS
• Debian/Ubuntu
• Install
• Generate Key
• Service
• Bash Aliases
• .gsocket file
• Login

Required Packages

Run on both client and server

RHEL/CentOS

dnf install make gcc openssl-devel autoconf git wget

Debian/Ubuntu

apt update && apt install -y make gcc libssl-dev autoconf git wget

Install

wget -O gsocket.sh https://raw.githubusercontent.com/hackerschoice/gsocket/master/install.sh
. gsocket.sh
make install

Server Side

Generate Key

gsocket -g

Service

/etc/systemd/system/gs-sshd.service

DANGER

Make sure you replace <KEY> with your own key on line 11

[Unit]
Description=OpenSSH server daemon
Documentation=man:sshd(8) man:sshd_config(5)
After=network.target sshd-keygen.target
Wants=sshd-keygen.target

[Service]
Type=notify
EnvironmentFile=-/etc/crypto-policies/back-ends/opensshserver.config
EnvironmentFile=-/etc/sysconfig/sshd
ExecStart=/usr/local/bin/gsocket -s <KEY> /usr/sbin/sshd -D $OPTIONS $CRYPTO_POLICY
ExecReload=/bin/kill -HUP $MAINPID
KillMode=process
Restart=on-failure
RestartSec=42s

[Install]
WantedBy=multi-user.target

chmod 600 /etc/systemd/system/gs-sshd.service
systemctl daemon-reload
systemctl enable --now gs-sshd

Client Side

Bash Aliases

~/.bash_aliases

function gssh() {
  local ssh_args="-o StrictHostKeyChecking=no"
  . ~/.gsocket
  if [ ! ${!1} = "" ]; then
    gsocket -s ${!1} ssh ${ssh_args} ${@:2} ${user}@gsocket
  else
    gsocket ssh ${ssh_args} $@ ${user}@gsocket
  fi
}

.gsocket file

~/.gsocket

user=username
name1=key1
name2=key2

Login

:~$ gssh name1
gsocket: =Encryption     : SRP-AES-256-CBC-SHA-End2End (Prime: 4096 bits)
Last login: Tue Nov 29 20:50:32 2022 from 127.0.0.1
name1@host:~$