1 files changed, 169 insertions, 0 deletions
diff --git a/collection/sshd/install.sh b/collection/sshd/install.sh
new file mode 100644
index 0000000..eb33a09
--- /dev/null
+++ b/collection/sshd/install.sh
@@ -0,0 +1,169 @@
+#!/usr/bin/env bash
+#-------------------------------------------------------------------------------------------------------------
+# Copyright (c) Microsoft Corporation. All rights reserved.
+# Licensed under the MIT License. See https://go.microsoft.com/fwlink/?linkid=2090316 for license information.
+#-------------------------------------------------------------------------------------------------------------
+#
+# Docs: https://github.com/microsoft/vscode-dev-containers/blob/main/script-library/docs/sshd.md
+# Maintainer: The VS Code and Codespaces Teams
+#
+# Syntax: ./sshd-debian.sh [SSH Port (don't use 22)] [non-root user] [start sshd now flag] [new password for user] [fix environment flag]
+#
+# Note: You can change your user's password with "sudo passwd $(whoami)" (or just "passwd" if running as root).
+
+SSHD_PORT=${1:-"2222"}
+USERNAME=${2:-"automatic"}
+START_SSHD=${3:-"false"}
+NEW_PASSWORD=${4:-"skip"}
+FIX_ENVIRONMENT=${5:-"true"}
+
+set -e
+
+if [ "$(id -u)" -ne 0 ]; then
+    echo -e 'Script must be run as root. Use sudo, su, or add "USER root" to your Dockerfile before running this script.'
+    exit 1
+fi
+
+# Determine the appropriate non-root user
+if [ "${USERNAME}" = "auto" ] || [ "${USERNAME}" = "automatic" ]; then
+    USERNAME=""
+    POSSIBLE_USERS=("vscode" "node" "codespace" "$(awk -v val=1000 -F ":" '$3==val{print $1}' /etc/passwd)")
+    for CURRENT_USER in ${POSSIBLE_USERS[@]}; do
+        if id -u ${CURRENT_USER} > /dev/null 2>&1; then
+            USERNAME=${CURRENT_USER}
+            break
+        fi
+    done
+    if [ "${USERNAME}" = "" ]; then
+        USERNAME=root
+    fi
+elif [ "${USERNAME}" = "none" ] || ! id -u ${USERNAME} > /dev/null 2>&1; then
+    USERNAME=root
+fi
+
+# Function to run apt-get if needed
+apt_get_update_if_needed()
+{
+    if [ ! -d "/var/lib/apt/lists" ] || [ "$(ls /var/lib/apt/lists/ | wc -l)" = "0" ]; then
+        echo "Running apt-get update..."
+        apt-get update
+    else
+        echo "Skipping apt-get update."
+    fi
+}
+
+# Checks if packages are installed and installs them if not
+check_packages() {
+    if ! dpkg -s "$@" > /dev/null 2>&1; then
+        apt_get_update_if_needed
+        apt-get -y install --no-install-recommends "$@"
+    fi
+}
+
+# Ensure apt is in non-interactive to avoid prompts
+export DEBIAN_FRONTEND=noninteractive
+
+# Install openssh-server openssh-client
+check_packages openssh-server openssh-client lsof
+
+# Generate password if new password set to the word "random"
+if [ "${NEW_PASSWORD}" = "random" ]; then
+    NEW_PASSWORD="$(openssl rand -hex 16)"
+    EMIT_PASSWORD="true"
+elif [ "${NEW_PASSWORD}" != "skip" ]; then
+    # If new password not set to skip, set it for the specified user
+    echo "${USERNAME}:${NEW_PASSWORD}" | chpasswd
+fi
+
+# Add user to ssh group
+if [ "${USERNAME}" != "root" ]; then
+    usermod -aG ssh ${USERNAME}
+fi
+
+# Setup sshd
+mkdir -p /var/run/sshd
+sed -i 's/session\s*required\s*pam_loginuid\.so/session optional pam_loginuid.so/g' /etc/pam.d/sshd
+sed -i 's/#*PermitRootLogin prohibit-password/PermitRootLogin yes/g' /etc/ssh/sshd_config
+sed -i -E "s/#*\s*Port\s+.+/Port ${SSHD_PORT}/g" /etc/ssh/sshd_config
+# Need to UsePAM so /etc/environment is processed
+sed -i -E "s/#?\s*UsePAM\s+.+/UsePAM yes/g" /etc/ssh/sshd_config
+
+# Script to store variables that exist at the time the ENTRYPOINT is fired
+store_env_script="$(cat << 'EOF'
+# Wire in codespaces secret processing to zsh if present (since may have been added to image after script was run)
+if [ -f  /etc/zsh/zlogin ] && ! grep '/etc/profile.d/00-restore-secrets.sh' /etc/zsh/zlogin > /dev/null 2>&1; then
+    echo -e "if [ -f /etc/profile.d/00-restore-secrets.sh ]; then . /etc/profile.d/00-restore-secrets.sh; fi\n$(cat /etc/zsh/zlogin 2>/dev/null || echo '')" | sudoIf tee /etc/zsh/zlogin > /dev/null
+fi
+EOF
+)"
+
+# Script to ensure login shells get the latest Codespaces secrets
+restore_secrets_script="$(cat << 'EOF'
+#!/bin/sh
+if [ "${CODESPACES}" != "true" ] || [ "${VSCDC_FIXED_SECRETS}" = "true" ] || [ ! -z "${GITHUB_CODESPACES_TOKEN}" ]; then
+    # Not codespaces, already run, or secrets already in environment, so return
+    return
+fi
+if [ -f /workspaces/.codespaces/shared/.env-secrets ]; then
+    while read line
+    do
+        key=$(echo $line | sed "s/=.*//")
+        value=$(echo $line | sed "s/$key=//1")
+        decodedValue=$(echo $value | base64 -d)
+        export $key="$decodedValue"
+    done < /workspaces/.codespaces/shared/.env-secrets
+fi
+export VSCDC_FIXED_SECRETS=true
+EOF
+)"
+
+# Write out a scripts that can be referenced as an ENTRYPOINT to auto-start sshd and fix login environments
+tee /usr/local/share/ssh-init.sh > /dev/null \
+<< 'EOF'
+#!/usr/bin/env bash
+# This script is intended to be run as root with a container that runs as root (even if you connect with a different user)
+# However, it supports running as a user other than root if passwordless sudo is configured for that same user.
+
+set -e 
+
+sudoIf()
+{
+    if [ "$(id -u)" -ne 0 ]; then
+        sudo "$@"
+    else
+        "$@"
+    fi
+}
+
+EOF
+if [ "${FIX_ENVIRONMENT}" = "true" ]; then
+    echo "${store_env_script}" >> /usr/local/share/ssh-init.sh
+    echo "${restore_secrets_script}" > /etc/profile.d/00-restore-secrets.sh
+    chmod +x /etc/profile.d/00-restore-secrets.sh
+    # Wire in zsh if present
+    if type zsh > /dev/null 2>&1; then
+        echo -e "if [ -f /etc/profile.d/00-restore-secrets.sh ]; then . /etc/profile.d/00-restore-secrets.sh; fi\n$(cat /etc/zsh/zlogin 2>/dev/null || echo '')" > /etc/zsh/zlogin
+    fi
+fi
+tee -a /usr/local/share/ssh-init.sh > /dev/null \
+<< 'EOF'
+
+# ** Start SSH server **
+sudoIf /etc/init.d/ssh start 2>&1 | sudoIf tee /tmp/sshd.log > /dev/null
+
+set +e
+exec "$@"
+EOF
+chmod +x /usr/local/share/ssh-init.sh
+
+# If we should start sshd now, do so
+if [ "${START_SSHD}" = "true" ]; then
+    /usr/local/share/ssh-init.sh
+fi
+
+# Output success details
+echo -e "Done!\n\n- Port: ${SSHD_PORT}\n- User: ${USERNAME}"
+if [ "${EMIT_PASSWORD}" = "true" ]; then
+    echo "- Password: ${NEW_PASSWORD}"
+fi
+echo -e "\nForward port ${SSHD_PORT} to your local machine and run:\n\n  ssh -p ${SSHD_PORT} -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null -o GlobalKnownHostsFile=/dev/null ${USERNAME}@localhost\n"