|
|
#
|
|
|
# Setup SSH settings and public keys
|
|
|
#
|
|
|
|
|
|
# Load utility functions
|
|
|
. ./functions.sh
|
|
|
|
|
|
if [ "$ENABLE_SSHD" = true ] ; then
|
|
|
DROPBEAR_ARGS=""
|
|
|
|
|
|
if [ "$SSH_ENABLE_ROOT" = false ] ; then
|
|
|
if [ "$ENABLE_REDUCE" = false ] || [ "$REDUCE_SSHD" = false ] ; then
|
|
|
# User root is not allowed to log in
|
|
|
sed -i "s|[#]*PermitRootLogin.*|PermitRootLogin no|g" "${ETC_DIR}/ssh/sshd_config"
|
|
|
else
|
|
|
# User root is not allowed to log in
|
|
|
DROPBEAR_ARGS="-w"
|
|
|
fi
|
|
|
fi
|
|
|
|
|
|
if [ "$ENABLE_ROOT" = true ] && [ "$SSH_ENABLE_ROOT" = true ] ; then
|
|
|
if [ "$ENABLE_REDUCE" = false ] || [ "$REDUCE_SSHD" = false ] ; then
|
|
|
# Permit SSH root login
|
|
|
sed -i "s|[#]*PermitRootLogin.*|PermitRootLogin yes|g" "${ETC_DIR}/ssh/sshd_config"
|
|
|
else
|
|
|
# Permit SSH root login
|
|
|
DROPBEAR_ARGS=""
|
|
|
fi
|
|
|
|
|
|
# Add SSH (v2) public key for user root
|
|
|
if [ -n "$SSH_ROOT_PUB_KEY" ] ; then
|
|
|
# Create root SSH config directory
|
|
|
mkdir -p "${R}/root/.ssh"
|
|
|
|
|
|
# Set permissions of root SSH config directory
|
|
|
chroot_exec chmod 700 "/root/.ssh"
|
|
|
chroot_exec chown root:root "/root/.ssh"
|
|
|
|
|
|
# Add SSH (v2) public key(s) to authorized_keys file
|
|
|
cat "$SSH_ROOT_PUB_KEY" >> "${R}/root/.ssh/authorized_keys"
|
|
|
|
|
|
# Set permissions of root SSH authorized_keys file
|
|
|
chroot_exec chmod 600 "/root/.ssh/authorized_keys"
|
|
|
chroot_exec chown root:root "/root/.ssh/authorized_keys"
|
|
|
|
|
|
if [ "$ENABLE_REDUCE" = false ] || [ "$REDUCE_SSHD" = false ] ; then
|
|
|
# Allow SSH public key authentication
|
|
|
sed -i "s|[#]*PubkeyAuthentication.*|PubkeyAuthentication yes|g" "${ETC_DIR}/ssh/sshd_config"
|
|
|
fi
|
|
|
fi
|
|
|
fi
|
|
|
|
|
|
if [ "$ENABLE_USER" = true ] ; then
|
|
|
# Add SSH (v2) public key for user $USER_NAME
|
|
|
if [ -n "$SSH_USER_PUB_KEY" ] ; then
|
|
|
# Create $USER_NAME SSH config directory
|
|
|
mkdir -p "${R}/home/${USER_NAME}/.ssh"
|
|
|
|
|
|
# Set permissions of $USER_NAME SSH config directory
|
|
|
chroot_exec chmod 700 "/home/${USER_NAME}/.ssh"
|
|
|
chroot_exec chown "${USER_NAME}":"${USER_NAME}" "/home/${USER_NAME}/.ssh"
|
|
|
|
|
|
# Add SSH (v2) public key(s) to authorized_keys file
|
|
|
cat "$SSH_USER_PUB_KEY" >> "${R}/home/${USER_NAME}/.ssh/authorized_keys"
|
|
|
|
|
|
# Set permissions of $USER_NAME SSH config directory
|
|
|
chroot_exec chmod 600 "/home/${USER_NAME}/.ssh/authorized_keys"
|
|
|
chroot_exec chown "${USER_NAME}":"${USER_NAME}" "/home/${USER_NAME}/.ssh/authorized_keys"
|
|
|
|
|
|
if [ "$ENABLE_REDUCE" = false ] || [ "$REDUCE_SSHD" = false ] ; then
|
|
|
# Allow SSH public key authentication
|
|
|
sed -i "s|[#]*PubkeyAuthentication.*|PubkeyAuthentication yes|g" "${ETC_DIR}/ssh/sshd_config"
|
|
|
fi
|
|
|
fi
|
|
|
fi
|
|
|
|
|
|
# Limit the users that are allowed to login via SSH
|
|
|
if [ "$SSH_LIMIT_USERS" = true ] && [ "$ENABLE_REDUCE" = false ] ; then
|
|
|
allowed_users=""
|
|
|
if [ "$ENABLE_ROOT" = true ] && [ "$SSH_ENABLE_ROOT" = true ] ; then
|
|
|
allowed_users="root"
|
|
|
fi
|
|
|
|
|
|
if [ "$ENABLE_USER" = true ] ; then
|
|
|
allowed_users="${allowed_users} ${USER_NAME}"
|
|
|
fi
|
|
|
|
|
|
if [ -n "$allowed_users" ] ; then
|
|
|
echo "AllowUsers ${allowed_users}" >> "${ETC_DIR}/ssh/sshd_config"
|
|
|
fi
|
|
|
fi
|
|
|
|
|
|
# Disable password-based authentication
|
|
|
if [ "$SSH_DISABLE_PASSWORD_AUTH" = true ] ; then
|
|
|
if [ "$ENABLE_ROOT" = true ] && [ "$SSH_ENABLE_ROOT" = true ] ; then
|
|
|
if [ "$ENABLE_REDUCE" = false ] || [ "$REDUCE_SSHD" = false ] ; then
|
|
|
sed -i "s|[#]*PermitRootLogin.*|PermitRootLogin without-password|g" "${ETC_DIR}/ssh/sshd_config"
|
|
|
else
|
|
|
DROPBEAR_ARGS="-g"
|
|
|
fi
|
|
|
fi
|
|
|
|
|
|
if [ "$ENABLE_REDUCE" = false ] || [ "$REDUCE_SSHD" = false ] ; then
|
|
|
sed -i "s|[#]*PasswordAuthentication.*|PasswordAuthentication no|g" "${ETC_DIR}/ssh/sshd_config"
|
|
|
sed -i "s|[#]*ChallengeResponseAuthentication no.*|ChallengeResponseAuthentication no|g" "${ETC_DIR}/ssh/sshd_config"
|
|
|
sed -i "s|[#]*UsePAM.*|UsePAM no|g" "${ETC_DIR}/ssh/sshd_config"
|
|
|
else
|
|
|
DROPBEAR_ARGS="${DROPBEAR_ARGS} -s"
|
|
|
fi
|
|
|
fi
|
|
|
|
|
|
# Update dropbear SSH configuration
|
|
|
if [ "$ENABLE_REDUCE" = true ] && [ "$REDUCE_SSHD" = true ] ; then
|
|
|
sed "s|^DROPBEAR_EXTRA_ARGS=.*|DROPBEAR_EXTRA_ARGS=\"${DROPBEAR_ARGS}\"|g" "${ETC_DIR}/default/dropbear"
|
|
|
fi
|
|
|
fi
|
