+++ /dev/null
-#!/bin/bash
-
-function __run_ssh_adduser() {
- set -e
- set -u
-
- # TODO would $EUID be better?
- if [[ "root" != "$(whoami)" ]]; then
- echo "webi adduser: running user is already a non-root user"
- exit 0
- fi
-
- if [[ ! -e ~/.ssh/authorized_keys ]] || ! grep -v '#' ~/.ssh/authorized_keys; then
- echo ""
- echo "Error:"
- echo " You must add a key to ~/.ssh/authorized_keys before adding a new ssh user."
- echo ""
- echo "To fix:"
- echo " Run 'curl https://webinstall.dev/ssh-pubkey | bash' on your local system, "
- echo " then add that key to ~/.ssh/authorized_keys on this (the remote) system. "
- echo ""
- exit 1
- fi
-
- # Add User 'app'
- # Picking 'app' by common convention (what Docker & Vagrant use).
- my_new_user="${1:-"app"}"
- #my_existing_user="${2:-"root"}"
- adduser --disabled-password --gecos '' "$my_new_user"
- my_password=$(openssl rand -hex 16)
- printf '%s\n%s' "${my_password}" "${my_password}" | passwd "${my_new_user}"
-
- # make 'app' a sudo-er (admin)
- adduser "$my_new_user" sudo
- echo "$my_new_user ALL=(ALL:ALL) NOPASSWD: ALL" | tee "/etc/sudoers.d/$my_new_user"
-
- # allow users who can already login as 'root' to login as 'app'
- mkdir -p "/home/$my_new_user/.ssh/"
- chmod 0700 "/home/$my_new_user/.ssh/"
- cp -r "${HOME}/.ssh/authorized_keys" "/home/$my_new_user/.ssh/"
- chmod 0600 "/home/$my_new_user/.ssh/authorized_keys"
- touch "/home/$my_new_user/.ssh/config"
- chmod 0644 "/home/$my_new_user/.ssh/config"
- chown -R "$my_new_user":"$my_new_user" "/home/$my_new_user/.ssh/"
-
- # ensure that 'app' has an SSH Keypair
- sudo -i -u "$my_new_user" bash -c "ssh-keygen -b 2048 -t rsa -f '/home/$my_new_user/.ssh/id_rsa' -q -N ''"
- chown -R "$my_new_user":"$my_new_user" "/home/$my_new_user/.ssh/"
-
- # Install webi for the new 'app' user
- WEBI_HOST=${WEBI_HOST:-"https://webinstall.dev"}
- sudo -i -u "$my_new_user" bash -c "curl -fsSL '$WEBI_HOST/webi' | bash" ||
- sudo -i -u "$my_new_user" bash -c "wget -q -O - '$WEBI_HOST/webi' | bash"
-
- # TODO ensure that ssh-password login is off
- my_pass="$(grep 'PasswordAuthentication yes' /etc/ssh/sshd_config)"
- my_pam=""
- if [[ "Darwin" == "$(uname -s)" ]]; then
- # Turn off PAM for macOS or it will allow password login
- my_pam="$(grep 'UsePAM yes' /etc/ssh/sshd_config)"
- fi
- if [[ -n ${my_pass} ]] || [[ -n ${my_pam} ]]; then
- echo "######################################################################"
- echo "# #"
- echo "# WARNING #"
- echo "# #"
- echo "# Found /etc/ssh/sshd_config: #"
- if [[ -n ${my_pass} ]]; then
- echo "# PasswordAuthentication yes #"
- fi
- if [[ -n ${my_pam} ]]; then
- echo "# UsePAM yes #"
- fi
- echo "# #"
- echo "# This is EXTREMELY DANGEROUS and insecure. #"
- echo "# We'll attempt to fix this now... #"
- echo "# #"
-
- sed -i 's/#\?PasswordAuthentication \(yes\|no\)/PasswordAuthentication no/' \
- /etc/ssh/sshd_config
-
- sed -i 's/#\?UsePAM \(yes\|no\)/UsePAM no/' \
- /etc/ssh/sshd_config
-
- if grep "PasswordAuthentication yes" /etc/ssh/sshd_config; then
- echo "# FAILED. Please check /etc/ssh/sshd_config manually. #"
- else
- echo "# Fixed... HOWEVER, you'll need to manually restart ssh: #"
- echo "# #"
- echo "# sudo systemctl restart ssh #"
- echo "# #"
- echo "# (you may want to make sure you can login as the new user first) #"
- fi
- echo "# #"
- echo "######################################################################"
- fi
-
- echo "Created user '${my_new_user}' as sudoer with a random password."
- echo "(set a new password with 'password ${my_new_user}')"
-}
-
-__run_ssh_adduser app
projects / webi-installers / .git / blobdiff