feat: Don't store credentials in log file
- Display the credentials on console - Removed option to hide credentials on console - Log file in `/var/log` and not in current directory - Remove SSH private key after displaying its on console
This commit is contained in:
Pratik Tripathy
@@ -1,13 +1,12 @@
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#!/bin/sh
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SCRIPT_NAME=server-init-harden
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SCRIPT_VERSION=2.7
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TIMESTAMP=$(date '+%Y-%m-%d_%H-%M-%S')
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LOG_FILE_NAME="${SCRIPT_NAME}_${TIMESTAMP}.log"
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SCRIPT_VERSION=3.1
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TIMESTAMP=$(date '+%Y-%m-%d-%H-%M-%S')
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LOG_FILE_NAME="/var/log/${SCRIPT_NAME}_${TIMESTAMP}.log"
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USERNAME=""
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RESET_ROOT=false
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SHOW_CREDENTIALS=false
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usage() {
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cat <<EOF
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@@ -29,7 +28,6 @@ DESCRIPTION:
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OPTIONS:
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-u USERNAME Create a new sudo user with the specified username
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-r Reset root password to a secure random value
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-s Show sensitive information (passwords, keys) in console output
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-h Display this help message
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EXAMPLES:
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@@ -42,13 +40,9 @@ EXAMPLES:
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# Create new user and reset root password
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$0 -u jay -r
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# Show all credentials in console output (less secure)
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$0 -u jay -s
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LOGGING:
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All operations are logged to: ./${SCRIPT_NAME}_TIMESTAMP.log
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All operations are logged to: /var/log/{SCRIPT_NAME}_TIMESTAMP.log
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Sensitive information (passwords, keys) are only logged to file by default
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Use -s flag to also show sensitive information in console output
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NOTES:
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- Requires root/sudo privileges
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@@ -85,10 +79,6 @@ parse_and_validate_args() {
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RESET_ROOT=true
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shift
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;;
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-s)
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SHOW_CREDENTIALS=true
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shift
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;;
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-h | --help)
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usage
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;;
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@@ -105,7 +95,11 @@ parse_and_validate_args() {
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###################################### HELPER FUNCTIONS ###################################
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create_log_file() {
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touch "$LOG_FILE_NAME"
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if [ ! -d "/var/log" ]; then
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mkdir -p "/var/log"
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fi
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touch "/var/log/$LOG_FILE_NAME"
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}
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file_log() {
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@@ -132,10 +126,7 @@ console_log() {
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log_credentials() {
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message="$1"
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file_log "CREDENTIALS" "$message"
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if [ "$SHOW_CREDENTIALS" = true ]; then
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console_log "CREDENTIALS" "$message"
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fi
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console_log "CREDENTIALS" "$message"
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}
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print_operation_details() {
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@@ -160,9 +151,13 @@ print_operation_details() {
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}
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print_log_file_details() {
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printf "\nLog file location: %s\n" "$LOG_FILE_NAME"
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printf " cat %s # View log file\n" "$LOG_FILE_NAME"
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printf " tail -f %s # Follow log in real-time\n\n" "$LOG_FILE_NAME"
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echo
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echo "See logfile for detailed output for each operation."
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echo "Location: $LOG_FILE_NAME"
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echo " tail -f $LOG_FILE_NAME # Follow log in real-time"
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echo
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echo "WARNING: Credentials WILL be displayed on this screen"
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echo "WARNING: Save the credentials as they WILL NOT BE SHOWN AGAIN"
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}
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formatted_execution_duration() {
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@@ -393,29 +388,29 @@ generate_ssh_key() {
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fi
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# Generate passphrase
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key_passphrase=$(head -c 12 /dev/urandom | base64 | tr -dc "[:alnum:]" | head -c 15)
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SSH_KEY_PASSPHRASE=$(head -c 12 /dev/urandom | base64 | tr -dc "[:alnum:]" | head -c 15)
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key_name="id_${SSH_KEY_USER}_ed25519"
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key_path="$ssh_dir/$key_name"
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SSH_KEY_FILE="$ssh_dir/$key_name"
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# Generate the SSH key
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file_log "INFO" "Generating SSH key for $SSH_KEY_USER"
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if ! output=$(ssh-keygen -o -a 1000 -t ed25519 -f "$key_path" -N "$key_passphrase" -C "$SSH_KEY_USER" -q 2>&1); then
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console_log "ERROR" "Failed to generate SSH key for user: $SSH_KEY_USER"
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file_log "ERROR" "Failed to generate SSH key for user: $SSH_KEY_USER"
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if ! output=$(ssh-keygen -o -a 1000 -t ed25519 -f "$SSH_KEY_FILE" -N "$SSH_KEY_PASSPHRASE" -C "$SSH_KEY_USER" -q 2>&1); then
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console_log "ERROR" "Failed to generate SSH key for user [ $SSH_KEY_USER ]"
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file_log "ERROR" "Failed to generate SSH key for user [ $SSH_KEY_USER ]"
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file_log "ERROR" "$output"
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return 1
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fi
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file_log "INFO" "SSH key generated for user: $SSH_KEY_USER"
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file_log "INFO" "To change passphrase: ssh-keygen -p -f $key_path -P"
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file_log "INFO" "SSH key generated for $SSH_KEY_USER"
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file_log "INFO" "To change passphrase: ssh-keygen -p -f $SSH_KEY_FILE -P"
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# Set proper permissions for the key
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chmod 600 "$key_path"
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chmod 644 "$key_path.pub"
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chmod 600 "$SSH_KEY_FILE"
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chmod 644 "$SSH_KEY_FILE.pub"
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# Append public key to authorized_keys
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authorized_keys="$ssh_dir/authorized_keys"
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if ! cat "$key_path.pub" >>"$authorized_keys"; then
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if ! cat "$SSH_KEY_FILE.pub" >>"$authorized_keys"; then
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console_log "ERROR" "Failed to append public key to authorized_keys"
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file_log "ERROR" "Failed to append public key to authorized_keys"
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return 1
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@@ -427,18 +422,18 @@ generate_ssh_key() {
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file_log "INFO" "Added public key to: $authorized_keys"
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# Log the key details
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file_log "INFO" "SSH key generated for user: $SSH_KEY_USER"
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console_log "SUCCESS" "SSH key generated for user: $SSH_KEY_USER"
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file_log "SUCCESS" "Key path: $key_path"
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file_log "INFO" "SSH key generated for [ $SSH_KEY_USER ]"
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console_log "SUCCESS" "SSH key generated for [ $SSH_KEY_USER ]"
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file_log "SUCCESS" "Key path: [ $SSH_KEY_FILE ]"
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console_log "INFO" "Key path: $key_path"
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console_log "INFO" "Authorized keys path: $authorized_keys"
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console_log "INFO" "Key path: [ $SSH_KEY_FILE ]"
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console_log "INFO" "Authorized keys path: [ $authorized_keys ]"
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log_credentials "SSH Key passphrase: $key_passphrase"
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log_credentials "SSH Key passphrase: [ $SSH_KEY_PASSPHRASE ]"
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log_credentials "Private key content:"
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log_credentials "$(cat "$key_path")"
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log_credentials "[$(cat "$SSH_KEY_FILE")]"
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log_credentials "Public key content:"
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log_credentials "$(cat "$key_path.pub")"
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log_credentials "[$(cat "$SSH_KEY_FILE.pub")]"
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}
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revert_ssh_config_changes() {
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@@ -1021,6 +1016,33 @@ configure_fail2ban() {
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fi
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}
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print_credentials() {
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echo
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echo "#############################################################"
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if [ "$RESET_ROOT" = "true" ]; then
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echo "New password for root: $ROOT_PASSWORD"
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echo
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fi
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if [ -n "$USERNAME" ]; then
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echo "New user: $USERNAME"
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echo "New user password: $USER_PASSWORD"
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echo
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fi
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echo "SSH private key:"
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cat "$SSH_KEY_FILE" && rm "$SSH_KEY_FILE" >/dev/null 2>&1
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echo
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echo "SSH Key's Passphrase: $SSH_KEY_PASSPHRASE"
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echo
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echo "SSH public key location: $SSH_KEY_FILE.pub:"
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cat "$SSH_KEY_FILE.pub"
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echo "#############################################################"
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}
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main() {
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parse_and_validate_args "$@"
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create_log_file
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@@ -1104,6 +1126,7 @@ main() {
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file_log "INFO" "Total execution time: [ $FORMATTED_DURATION ]"
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print_log_file_details
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print_credentials_and_clean_up
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return 0
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}
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