32-sshd.sh
116 lines
| 4.1 KiB
| application/x-sh
|
BashLexer
/ bootstrap.d / 32-sshd.sh
drtyhlpr
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r120 | # | ||
# Setup SSH settings and public keys | ||||
# | ||||
# Load utility functions | ||||
. ./functions.sh | ||||
if [ "$ENABLE_SSHD" = true ] ; then | ||||
drtyhlpr
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r142 | DROPBEAR_ARGS="" | ||
drtyhlpr
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r120 | if [ "$SSH_ENABLE_ROOT" = false ] ; then | ||
drtyhlpr
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r142 | if [ "$ENABLE_REDUCE" = false ] || [ "$REDUCE_SSHD" = false ] ; then | ||
# User root is not allowed to log in | ||||
sed -i "s|[#]*PermitRootLogin.*|PermitRootLogin no|g" "${ETC_DIR}/ssh/sshd_config" | ||||
else | ||||
# User root is not allowed to log in | ||||
DROPBEAR_ARGS="-w" | ||||
fi | ||||
drtyhlpr
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r120 | fi | ||
if [ "$ENABLE_ROOT" = true ] && [ "$SSH_ENABLE_ROOT" = true ] ; then | ||||
drtyhlpr
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r142 | if [ "$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 | ||||
drtyhlpr
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r120 | |||
# Add SSH (v2) public key for user root | ||||
if [ ! -z "$SSH_ROOT_PUB_KEY" ] ; then | ||||
drtyhlpr
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r126 | # Create root SSH config directory | ||
mkdir -p "${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 | ||||
drtyhlpr
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r123 | cat "$SSH_ROOT_PUB_KEY" >> "${R}/root/.ssh/authorized_keys" | ||
drtyhlpr
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r120 | |||
drtyhlpr
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r126 | # Set permissions of root SSH authorized_keys file | ||
drtyhlpr
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r123 | chroot_exec chmod 600 "/root/.ssh/authorized_keys" | ||
chroot_exec chown root:root "/root/.ssh/authorized_keys" | ||||
drtyhlpr
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r120 | |||
drtyhlpr
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r142 | if [ "$ENABLE_REDUCE" = false ] || [ "$REDUCE_SSHD" = false ] ; then | ||
# Allow SSH public key authentication | ||||
sed -i "s|[#]*PubkeyAuthentication.*|PubkeyAuthentication yes|g" "${ETC_DIR}/ssh/sshd_config" | ||||
fi | ||||
drtyhlpr
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r120 | fi | ||
fi | ||||
drtyhlpr
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r122 | if [ "$ENABLE_USER" = true ] ; then | ||
# Add SSH (v2) public key for user $USER_NAME | ||||
if [ ! -z "$SSH_USER_PUB_KEY" ] ; then | ||||
drtyhlpr
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r126 | # 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/${USER_NAME}/.ssh" | ||||
# Add SSH (v2) public key(s) to authorized_keys file | ||||
drtyhlpr
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r123 | cat "$SSH_USER_PUB_KEY" >> "${R}/home/${USER_NAME}/.ssh/authorized_keys" | ||
drtyhlpr
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r120 | |||
drtyhlpr
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r126 | # Set permissions of $USER_NAME SSH config directory | ||
drtyhlpr
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r123 | chroot_exec chmod 600 "/home/${USER_NAME}/.ssh/authorized_keys" | ||
chroot_exec chown ${USER_NAME}:${USER_NAME} "/home/${USER_NAME}/.ssh/authorized_keys" | ||||
drtyhlpr
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r120 | |||
drtyhlpr
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r142 | if [ "$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 | ||||
drtyhlpr
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r122 | fi | ||
drtyhlpr
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r120 | fi | ||
# Limit the users that are allowed to login via SSH | ||||
drtyhlpr
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r142 | if [ "$SSH_LIMIT_USERS" = true ] && [ "$ENABLE_REDUCE" = false ] ; then | ||
drtyhlpr
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r122 | allowed_users="" | ||
drtyhlpr
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r120 | if [ "$ENABLE_ROOT" = true ] && [ "$SSH_ENABLE_ROOT" = true ] ; then | ||
drtyhlpr
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r122 | allowed_users="root" | ||
fi | ||||
if [ "$ENABLE_USER" = true ] ; then | ||||
allowed_users="${allowed_users} ${USER_NAME}" | ||||
fi | ||||
if [ ! -z "$allowed_users" ] ; then | ||||
echo "AllowUsers ${allowed_users}" >> "${ETC_DIR}/ssh/sshd_config" | ||||
drtyhlpr
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r120 | fi | ||
fi | ||||
# Disable password-based authentication | ||||
if [ "$SSH_DISABLE_PASSWORD_AUTH" = true ] ; then | ||||
if [ "$ENABLE_ROOT" = true ] && [ "$SSH_ENABLE_ROOT" = true ] ; then | ||||
drtyhlpr
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r142 | if [ "$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 | ||||
drtyhlpr
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r120 | fi | ||
drtyhlpr
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r142 | 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" | ||||
drtyhlpr
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r120 | fi | ||
fi | ||||