Script to move authorized_keys to central location

If there is a ssh setting that we have a central location for SSH keys
move all users ssh keys there.
Currently skipped are core admin users, they will move later once all
tests are done

.gitignore

@@ -1,3 +1,3 @@
 user_list.txt
-user_password*.txt
+user_password*.txt*
 *.zip

Readme.md

@@ -199,6 +199,31 @@ The public key part can be extracted from the SSH PEM key with
 
 *[PEM]* is the placeholder for the filename
 
+## Lock and unlock uses
+
+If a user should be stopped from logging in via ssh the user needs to be removed from the sshallow or sshforward groups. Note that the sshforward group only exists on jump hosts and can normally be ignored.
+
+Default 100% ignored users are 'root', 'ec2-user', 'admin', 'ubuntu'
+
+### Lock users
+
+`bin/lock_users.sh -t <user 1> <user 2> ...`
+
+The `-t` flag is for test run.
+
+If the user is not in the sshallow or sshreject group the change will be skipped.
+Locked users will be moved to the sshreject group
+
+### Unlock users
+
+If a user exists in the sshreject group the user can be unlocked
+
+`bin/unlock_uses.sh -t -s <allow|forward> <user 1> <user 2> ...`
+
+Like the lock user script it will only work on users in the sshreject group. But here the target allow / forward group must be selected.
+
+If not set it defaults to allow, if a user_list.txt file with this user exist it will try to extract this data if the `-s` option is not set
+
 ## Last login check scripts
 
 There are two scripts that can be user to check if and when the user has logged in the last time.

bin/authorized_key_location_change.sh.sh

@@ -0,0 +1,114 @@
+#!/usr/bin/env bash
+
+# check if we need to move the users authorized keys to the central location
+
+TEST=0;
+SKIP_USERS=();
+while getopts ":tis:" opt; do
+	case "${opt}" in
+		t|test)
+			TEST=1;
+			;;
+		s|skip)
+			SKIP_USERS+=("${OPTARG}");
+			;;
+		\?)
+			echo -e "\n Option does not exist: ${OPTARG}\n";
+			echo "Use -t for test and -s <user> for users to skip";
+			exit 1;
+			;;
+	esac;
+done;
+
+# check if authorized keys is actually enabled
+# detect ssh authorized_keys setting
+SSH_CENTRAL_AUTHORIZED_FILE_FOLDER='';
+SSH_AUTHORIZED_FILE='';
+for cf in $(grep "^AuthorizedKeysFile" /etc/ssh/sshd_config | grep "%u"); do
+	if [ ! -z $(echo "${cf}" | grep "%u") ]; then
+		SSH_CENTRAL_AUTHORIZED_FILE_FOLDER=$(echo "${cf}" | sed -e 's/%u//');
+		if [ ! -d "${SSH_CENTRAL_AUTHORIZED_FILE_FOLDER}" ]; then
+			echo "ssh central authorized_file folder could not be found: ${SSH_CENTRAL_AUTHORIZED_FILE_FOLDER}";
+			exit;
+		fi;
+	fi;
+done;
+if [ -z "${SSH_CENTRAL_AUTHORIZED_FILE_FOLDER}" ]; then
+	echo "No central authorized_keys file detected, no change check needed";
+	exit;
+fi;
+echo "SSH Authorized Files folder: ${SSH_CENTRAL_AUTHORIZED_FILE_FOLDER}";
+
+PRINTF_INFO="%-8s [%3s]: %-25s: %s\n";
+# list of user accounts we will never touch
+NO_ACTION=(root admin ec2-user ubuntu);
+
+# loop over passwd file
+# if not in no action then check if .ssh/authorized_keys file exists
+cat /etc/passwd | cut -d ":" -f 1,6 |
+while read user_home; do
+	username=$(echo "${user_home}" | cut -d ":" -f 1);
+	# skip admin usernames
+	if [[ " ${NO_ACTION[*]} " =~ " ${username} " ]]; then
+		printf "${PRINTF_INFO}" "NO ACT" "!" "${username}" "user in NO ACTION list";
+		continue;
+	fi;
+	if [[ " ${SKIP_USERS[*]} " =~ " ${username} " ]]; then
+		printf "${PRINTF_INFO}" "SKIP" "*" "${username}" "skip forced via command line";
+		continue;
+	fi;
+	home_folder=$(echo "${user_home}" | cut -d ":" -f 2);
+	# skip no .ssh/authorized_ekys
+	if [ ! -f "${home_folder}/.ssh/authorized_keys" ]; then
+		# but do we have an auth folder, if yes -> exist skip
+		if [ -f "${SSH_CENTRAL_AUTHORIZED_FILE_FOLDER}/${username}" ]; then
+			printf "${PRINTF_INFO}" "DONE" "." "${username}" "already moved";
+		else
+			printf "${PRINTF_INFO}" "IGNORE" "?" "${username}" "no authorized_keys file";
+		fi;
+		continue;
+	fi;
+	# check if this user public key(s) exist in AuthorizedKeysFile target
+	if [ -f "${SSH_CENTRAL_AUTHORIZED_FILE_FOLDER}/${username}" ]; then
+		ssh_key_diff=$(diff -u "${home_folder}/.ssh/authorized_keys" "${SSH_CENTRAL_AUTHORIZED_FILE_FOLDER}/${username}");
+		if [ -z "${ssh_key_diff}" ]; then
+			printf "${PRINTF_INFO}" "REMOVE" "-" "${username}" ".ssh/authorized_keys";
+			if [ ${TEST} -eq 0 ]; then
+				rm "${home_folder}/.ssh/authorized_keys";
+			else
+				echo "$> rm \"${home_folder}/.ssh/authorized_keys\"";
+			fi;
+			continue;
+		fi;
+		# No update, alert
+		printf "${PRINTF_INFO}" "DIFF" "???" "${username}" "Different authorized keys in home dir, SKIPPED";
+		continue;
+	fi;
+	printf "${PRINTF_INFO}" "MOVE" ">" "${username}" "Move SSH Key to central location";
+	# move public keys over
+	if [ ${TEST} -eq 0 ]; then
+		cat "${home_folder}/.ssh/authorized_keys" > "${SSH_CENTRAL_AUTHORIZED_FILE_FOLDER}/${username}";
+		# secure new folder: chown/chmod/chattr
+		chown ${username} "${SSH_CENTRAL_AUTHORIZED_FILE_FOLDER}/${username}";
+		chmod 400 "${SSH_CENTRAL_AUTHORIZED_FILE_FOLDER}/${username}";
+		chattr +i "${SSH_CENTRAL_AUTHORIZED_FILE_FOLDER}/${username}";
+		# confirm
+		ssh_key_diff=$(diff -u "${home_folder}/.ssh/authorized_keys" "${SSH_CENTRAL_AUTHORIZED_FILE_FOLDER}/${username}");
+		if [ ! -z "${ssh_key_diff}" ]; then
+			printf "${PRINTF_INFO}" "ERROR" "!!!" "${username}" "Move problem ${ssh_key_diff}";
+			break;
+		fi;
+		# remove home .ssh/authorized_keys (do not remove folder)
+		rm "${home_folder}/.ssh/authorized_keys";
+	else
+		echo "[START] ====>";
+		echo "$> cat \"${home_folder}/.ssh/authorized_keys\" > \"${SSH_CENTRAL_AUTHORIZED_FILE_FOLDER}/${username}\"";
+		echo "$> chown ${username} \"${SSH_CENTRAL_AUTHORIZED_FILE_FOLDER}/${username}\"";
+		echo "$> chmod 400 \"${SSH_CENTRAL_AUTHORIZED_FILE_FOLDER}/${username}\"";
+		echo "$> chattr +i \"${SSH_CENTRAL_AUTHORIZED_FILE_FOLDER}/${username}\"";
+		echo "$> rm \"${home_folder}/.ssh/authorized_keys\"";
+		echo "[END  ] ====>";
+	fi;
+done;
+
+# __END__

bin/check_last_login.sh

@@ -41,21 +41,26 @@ echo "Max age no login  : ${max_age_create} days";
 for ssh_group in ${ssh_groups[@]}; do
 echo "--------------------->"
 echo "Checking Group    : ${ssh_group}";
-	for user in $(cat /etc/group|grep "${ssh_group}:" | cut -d ":" -f 4 | sed -e 's/,/ /g'); do
+	for username in $(cat /etc/group|grep "${ssh_group}:" | cut -d ":" -f 4 | sed -e 's/,/ /g'); do
+		# check that user exists in passwd
+		if ! id "${username}" &>/dev/null; then
+			echo "[!] User $username does not exists in /etc/passwd file";
+			continue;
+		fi;
 		account_age=0;
 		delete_user=0;
 		out_string="";
-		#echo "* Checking user ${user}";
+		#echo "* Checking user ${username}";
 		# check user create time, if we have set it in comment
-		user_create_date=$(cat /etc/passwd | grep "${user}:" | cut -d ":" -f 5);
+		user_create_date=$(cat /etc/passwd | grep "${username}:" | cut -d ":" -f 5);
 		# if empty try last password set time
 		if [ -z "${user_create_date}" ]; then
 			# user L 11/09/2020 0 99999 7 -1
-			user_create_date=$(passwd -S ${user} | cut -d " " -f 3);
+			user_create_date=$(passwd -S ${username} | cut -d " " -f 3);
 		fi;
 		# last try is user home .bash_logout
 		if [ -z "${user_create_date}" ]; then
-			home_dir=$(cat /etc/passwd | grep "${user}:" | cut -d ":" -f 6)"/.bash_logout";
+			home_dir=$(cat /etc/passwd | grep "${username}:" | cut -d ":" -f 6)"/.bash_logout";
 			user_create_date=$(stat -c %Z "${home_dir}");
 		fi;
 
@@ -63,15 +68,15 @@ echo "Checking Group    : ${ssh_group}";
 		# users. Use the collect script from systemd-logind or /var/log/secure
 		# Username         Port     From             Latest
 		# user             pts/35   10.110.160.230   Wed Nov  2 09:40:35 +0900 2022
-		last_login_string=$(lastlog -u ${user} | sed 1d);
+		last_login_string=$(lastlog -u ${username} | sed 1d);
 		search="Never logged in";
 		found="";
 		# problem with running rep check in if
 		if [ -f "${AUTH_LOG}" ]; then
-			found=$(grep "${user};" "${AUTH_LOG}");
+			found=$(grep "${username};" "${AUTH_LOG}");
 		fi;
 		if [ ! -z "${found}" ]; then
-			last_login_date=$(grep "${user};" "${AUTH_LOG}" | cut -d ";" -f 2 | date +"%s" -f -);
+			last_login_date=$(grep "${username};" "${AUTH_LOG}" | cut -d ";" -f 2 | date +"%s" -f -);
 			last_login=$(awk '{printf("%.0f\n",($1-$2)/$3)}' <<<"${now} ${last_login_date} ${day}");
 			if [ ${last_login} -gt ${max_age_login} ]; then
 				out_string="[!] last ssh log in ${last_login} days ago";
@@ -109,15 +114,15 @@ echo "Checking Group    : ${ssh_group}";
 		fi;
 		# build delete output
 		if [ ${delete_user} = 1 ]; then
-			delete_accounts="${delete_accounts}"$(printf "${user_group_tpl}" "${user}" "${ssh_group}" "${user}" "${ssh_reject_group}")$'\n';
+			delete_accounts="${delete_accounts}"$(printf "${user_group_tpl}" "${username}" "${ssh_group}" "${username}" "${ssh_reject_group}")$'\n';
 		fi;
-		printf "* Checking user %-20s: %s\n" "${user}" "${out_string}";
+		printf "* Checking user %-20s: %s\n" "${username}" "${out_string}";
 	done;
 done;
 echo "--------------------->"
 echo "Showing current SSH Reject users:"
 for user in $(cat /etc/group|grep "${ssh_reject_group}:" | cut -d ":" -f 4 | sed -e 's/,/ /g'); do
-	echo "${user}";
+	echo "${username}";
 done;
 if [ ! -z "${delete_accounts}" ]; then
 	echo "--------------------->"

bin/create_user.sh

@@ -27,7 +27,7 @@
 # SET TO 1 to TEST [will not create user/group/folder]
 TEST=0; # no creation except ssh keys
 INFO=0; # no creation of anything, just print info strings
-while getopts ":ti" opt; do
+while getopts ":tih:" opt; do
 	case "${opt}" in
 		t|test)
 			TEST=1;
@@ -35,6 +35,15 @@ while getopts ":ti" opt; do
 		i|info)
 			INFO=1;
 			;;
+		h|home)
+			HOME_LOCATION="${OPTARG}";
+			;;
+		\?)
+			echo -e "\n Option does not exist: ${OPTARG}\n";
+			echo "Use -t for test and -i for info";
+			echo "Override default /home/ folder location with -h <base>";
+			exit 1;
+			;;
 	esac;
 done;
 # hostname for output file only
@@ -43,24 +52,68 @@ timestamp=$(date +%Y%m%d-%H%M%S)
 # character to set getween info blocks
 separator="#";
 # base folder for all data
-root_folder=$(pwd)'/';
+BASE_FOLDER=$(dirname $(readlink -f $0))"/";
+# home folder is always thome
+HOME_BASE="/home/";
+# config location
+CONFIG_BASE="${BASE_FOLDER}../config/";
+# check config folder for .env file with HOME_LOCATION
+# only use if HOME_LOCATION not yet set
+if [ -z "${HOME_LOCATION}" ] && [ -f "${CONFIG_BASE}create_user.cfg" ]; then
+	source <(grep = ${CONFIG_BASE}create_user.cfg | sed 's/ *= */=/g')
+fi;
+
+if [ ! -z "${HOME_LOCATION}" ]; then
+	# must start with / as it has to be from root
+	if [ "${HOME_LOCATION##/*}" ]; then
+		echo "Home location folder must start with a slash (/): ${HOME_LOCATION}";
+		exit;
+	fi;
+	# must be valid folder
+	if [ ! -d "${HOME_LOCATION}" ]; then
+		echo "Folder for home location does not exists: ${HOME_LOCATION}";
+		exit;
+	fi;
+fi;
+# the new location for home, if override is set will be created in this folder
+HOME_FOLDER="${HOME_LOCATION}${HOME_BASE}"
+if [ ! -d "${HOME_FOLDER}" ]; then
+	echo "Home folder location not found: ${HOME_FOLDER}";
+	exit;
+fi;
+ROOT_FOLDER="${BASE_FOLDER}../";
 input_file='user_list.txt';
 output_file="user_password.${timestamp}.txt";
 output_zip_folder='zip/';
 output_zip="users.${timestamp}.zip"
-ssh_keygen_folder='ssh-keygen/';
-ssh_keygen_folder_created_pub='ssh-keygen-created-pub/';
-ssh_keytype='ed25519';
+SSH_KEYGEN_FOLDER='ssh-keygen/';
+SSH_KEYGEN_FOLDER_CREATED_PUB='ssh-keygen-created-pub/';
+# set default key tpye
+default_ssh_keytype='ed25519';
+ssh_keytype='';
 # sshallow or sshforward
 ssh_group='';
 ssh_forward_ok=0;
+# detect ssh authorized_keys setting
+SSH_CENTRAL_AUTHORIZED_FILE_FOLDER='';
+SSH_AUTHORIZED_FILE='';
+for cf in $(grep "^AuthorizedKeysFile" /etc/ssh/sshd_config | grep "%u"); do
+	if [ ! -z $(echo "${cf}" | grep "%u") ]; then
+		SSH_CENTRAL_AUTHORIZED_FILE_FOLDER=$(echo "${cf}" | sed -e 's/%u//');
+		if [ ! -d "${SSH_CENTRAL_AUTHORIZED_FILE_FOLDER}" ]; then
+			echo "ssh central authorized_file folder could not be found: ${SSH_CENTRAL_AUTHORIZED_FILE_FOLDER}";
+			exit;
+		fi;
+	fi;
+done;
+
 # check if ssh key folder exists
-if [ ! -d "${root_folder}${ssh_keygen_folder}" ]; then
-	mkdir "${root_folder}${ssh_keygen_folder}";
+if [ ! -d "${ROOT_FOLDER}${SSH_KEYGEN_FOLDER}" ]; then
+	mkdir "${ROOT_FOLDER}${SSH_KEYGEN_FOLDER}";
 fi;
 # check if zip folder is missing
-if [ ! -d "${root_folder}${output_zip_folder}" ]; then
-	mkdir "${root_folder}${output_zip_folder}";
+if [ ! -d "${ROOT_FOLDER}${output_zip_folder}" ]; then
+	mkdir "${ROOT_FOLDER}${output_zip_folder}";
 fi;
 # check if password generate software is installed
 # if [ ! command -v pwgen &> /dev/null ]; then
@@ -84,8 +137,8 @@ if [ ! -z $(cat /etc/group | grep "sshforward:") ]; then
 	ssh_forward_ok=1;
 fi;
 # check if user list file exists
-if [ ! -f "${root_folder}${input_file}" ]; then
-	echo "Missing ${root_folder}${input_file}";
+if [ ! -f "${ROOT_FOLDER}${input_file}" ]; then
+	echo "Missing ${ROOT_FOLDER}${input_file}";
 	exit;
 fi;
 # make sure my own folder is owned by root and 600 (except for testing)
@@ -101,17 +154,19 @@ if [ $(whoami) != "root" ]; then
 	fi;
 fi;
 # create users
-cat "${root_folder}${input_file}" |
+cat "${ROOT_FOLDER}${input_file}" |
 while read i; do
 	# skip rows start with # (comment)
 	if [[ "${i}" =~ ^\# ]]; then
 		continue;
 	fi;
-	# make lower case, remove spaces
-	user=$(echo "${i}" | cut -d ";" -f 2 | tr A-Z a-z | tr -d ' ');
+	# POS 2: make lower case, remove spaces
+	username=$(echo "${i}" | cut -d ";" -f 2 | tr A-Z a-z | tr -d ' ');
+	# POS 3: groups
 	_group=$(echo "${i}" | cut -d ";" -f 3 | tr A-Z a-z | tr -d ' ');
 	group=$(echo "${_group}" | cut -d "," -f 1);
 	sub_group="";
+	# POS 4: ssh access type
 	ssh_access_type=$(echo "${i}" | cut -d ";" -f 4 | tr A-Z a-z | tr -d ' ');
 	# if not allow or forward, set to access
 	if [ "${ssh_access_type}" != "allow" ] && [ "${ssh_access_type}" != "forward" ]; then
@@ -119,7 +174,7 @@ while read i; do
 		ssh_access_type="allow";
 	fi;
 	if [ $ssh_forward_ok -eq 0 ] && [ "${ssh_access_type}" = "forward" ]; then
-		echo "[!!!] sshforward group does not exsts, cannot set user ${user}";
+		echo "[!!!] sshforward group does not exsts, cannot set user ${username}";
 		break;
 	fi;
 	ssh_group="ssh${ssh_access_type}";
@@ -130,39 +185,42 @@ while read i; do
 		sub_group=$(echo "${_group}" | cut -d "," -f 2-);
 		sub_group_opt=" -G ${sub_group}";
 	fi;
-	# override host name, lowercase and spaces removed
-	_hostname=$(echo "${i}" | cut -d ";" -f 5 | tr A-Z a-z | tr -d ' ');
+	# POS 5: do we have a password preset
+	_password=$(echo "${i}" | cut -d ";" -f 5);
+	# POS 6: override host name, lowercase and spaces removed
+	_hostname=$(echo "${i}" | cut -d ";" -f 6 | tr A-Z a-z | tr -d ' ');
 	if [ -z "${_hostname}" ]; then
 		hostname=${host};
 	else
 		hostname=${_hostname};
 	fi;
-			# do we have a password preset
-	_password=$(echo "${i}" | cut -d ";" -f 4);
-	_ssh_keytype=$(echo "${i}" | cut -d ";" -f 6 | tr A-Z a-z | tr -d ' ');
+	# POS 7: ssh keytype override
+	_ssh_keytype=$(echo "${i}" | cut -d ";" -f 7 | tr A-Z a-z | tr -d ' ');
 	if [ "${_ssh_keytype}" = "rsa" ]; then
 		ssh_keytype="${_ssh_keytype}";
 		#echo "[!!] BACKWARDS COMPATIBLE RSA TYPE SELECTION [!!]";
+	else
+		ssh_keytype=${default_ssh_keytype};
 	fi;
 	# user & group not set
-	if [ -z "${user}" ] || [ -z "${_group}" ]; then
-		echo "[!!!!!] Missing user or group entry for ${user}/${_group}";
+	if [ -z "${username}" ] || [ -z "${_group}" ]; then
+		echo "[!!!!!] Missing user or group entry for ${username}/${_group}";
 		echo "[*** ABORT RUN ***]"
 		break;
 	fi;
 	# SSH file name part without folder
-	ssh_keygen_id="${hostname}${separator}${group}${separator}${user}${separator}${ssh_keytype}.pem";
+	ssh_keygen_id="${hostname}${separator}${group}${separator}${username}${separator}${ssh_keytype}.pem";
 	# the full file including folder name
-	ssh_keyfile="${root_folder}${ssh_keygen_folder}${ssh_keygen_id}";
+	ssh_keyfile="${ROOT_FOLDER}${SSH_KEYGEN_FOLDER}${ssh_keygen_id}";
 	# publ file if new
 	ssh_keyfile_pub="${ssh_keyfile}.pub";
 	# check existing pub file
-	ssh_keyfile_check_pub="${root_folder}${ssh_keygen_folder_created_pub}${ssh_keygen_id}.pub";
+	ssh_keyfile_check_pub="${ROOT_FOLDER}${SSH_KEYGEN_FOLDER_CREATED_PUB}${ssh_keygen_id}.pub";
 
 	if [ ${INFO} -eq 1 ]; then
 		# test if pub file exists or not, test if user exists
-		echo -n "User: '${user}:${group}(${sub_group});${ssh_group}', SSH: ${ssh_keygen_id}";
-		if getent passwd ${user} > /dev/null 2>&1; then
+		echo -n "User: '${username}:${group}(${sub_group});${ssh_group}', SSH: ${ssh_keygen_id}";
+		if getent passwd ${username} > /dev/null 2>&1; then
 			echo -n ", User exists";
 		fi;
 		if [ -f "${ssh_keyfile_check_pub}" ]; then
@@ -182,24 +240,31 @@ while read i; do
 		fi;
 	done;
 	# check if user is not already created
-	if getent passwd ${user} > /dev/null 2>&1; then
-		echo "-- Skip '${user}:${group}(${sub_group})'";
+	# if getent passwd ${username} > /dev/null 2>&1; then
+	if id "${username}" &>/dev/null; then
+		echo "-- Skip '${username}:${group}(${sub_group})'";
 	else
-		echo "++ Create '${user}:${group}(${sub_group})'";
+		echo "++ Create '${username}:${group}(${sub_group})'";
 		if [ ${TEST} -eq 0 ]; then
 			# comment is user create time
-			useradd -c `date +"%F"` -s /bin/bash -g ${group}${sub_group_opt} -m ${user};
+			useradd -c `date +"%F"` -s /bin/bash -g ${group}${sub_group_opt} -d "${HOME_FOLDER}" -m ${username};
 		else
-			echo "$> useradd -s /bin/bash -g ${group}${sub_group_opt} -m ${user}";
+			echo "$> useradd -c `date +"%F"` -s /bin/bash -g ${group}${sub_group_opt} -d "${HOME_FOLDER}" -m ${username}";
 		fi;
 	fi;
+	# set the auth file
+	if [ -z "${SSH_CENTRAL_AUTHORIZED_FILE_FOLDER}" ]; then
+		SSH_AUTHORIZED_FILE="${HOME_FOLDER}${username}/.ssh/authorized_keys";
+	else
+		SSH_AUTHORIZED_FILE="${SSH_CENTRAL_AUTHORIZED_FILE_FOLDER}${username}";
+	fi;
 	skip_ssh=0;
 	# if public pem already exists skip creation
 	if [ ! -f "${ssh_keyfile_check_pub}" ]; then
 		# Note we only create a password if we need it
 		# password + store pwgen 10 1 -1
 		if [ -z "${_password}" ]; then
-			password=$(printf "%s" $(pwgen 10 1));
+			password=$(printf "%s" $(pwgen 14 1));
 		else
 			echo "! Override password set";
 			password=${_password};
@@ -210,19 +275,19 @@ while read i; do
 			ssh-keygen \
 				-t ${ssh_keytype} \
 				-f "${ssh_keyfile}" \
-				-C "${hostname}: ${user}@${group}" \
+				-C "${hostname}: ${username}@${group}" \
 				-a 100 -N "${password}"
 		else
-			echo "$> ssh-keygen -t ${ssh_keytype} -f ${ssh_keyfile} -C ${hostname}: ${user}@${group} -a 100 -N ${password}";
+			echo "$> ssh-keygen -t ${ssh_keytype} -f ${ssh_keyfile} -C ${hostname}: ${username}@${group} -a 100 -N ${password}";
 		fi;
 	else
-		found=$(grep "$(cat ${ssh_keyfile_check_pub})" /home/${user}/.ssh/authorized_keys);
+		found=$(grep "$(cat ${ssh_keyfile_check_pub})" ${SSH_AUTHORIZED_FILE});
 		if [ ! -z "${found}" ]; then
 			skip_ssh=1;
-			# override previously set with stored one
-			ssh_keyfile_pub=${ssh_keyfile_check_pub};
 			echo "-- Skip SSH Key creation: ${ssh_keygen_id}.pub";
 		else
+			# override previously set with stored one
+			ssh_keyfile_pub=${ssh_keyfile_check_pub};
 			echo " < Use existing public ssh key '${ssh_keygen_id}.pub'";
 			# Password already set notification
 		fi;
@@ -231,33 +296,58 @@ while read i; do
 	if [ ${skip_ssh} -eq 0 ]; then
 		# write login info to output file
 		if [ ${TEST} -eq 0 ]; then
-			create_output_file="${root_folder}${output_file}";
+			create_output_file="${ROOT_FOLDER}${output_file}";
 		else
-			create_output_file="${root_folder}${output_file}.TEST";
+			create_output_file="${ROOT_FOLDER}${output_file}.TEST";
 		fi;
-		echo $(date +"%F %T")";"${host}";"${_hostname}";"${user}";"${password}";"${ssh_allow_type} >> ${create_output_file};
+		echo $(date +"%F %T")";"${host}";"${_hostname}";"${username}";"${password}";"${ssh_allow_type} >> ${create_output_file};
+		# create folder only if we do not have central
 		# create the SSH foler and authorized access file with correct permissions
-		echo " > Create .ssh folder";
-		if [ ${TEST} -eq 0 ]; then
-			mkdir /home/${user}/.ssh/;
-		else
-			echo "$> mkdir /home/${user}/.ssh/";
+		if [ ! -z "${SSH_CENTRAL_AUTHORIZED_FILE_FOLDER}" ]; then
+			echo " > Create .ssh folder";
+			if [ ${TEST} -eq 0 ]; then
+				mkdir ${HOME_FOLDER}${username}/.ssh/;
+			else
+				echo "$> mkdir ${HOME_FOLDER}${username}/.ssh/";
+			fi;
 		fi;
-		echo " > Add public into authorized_keys";
+		# add
+		echo " > Add public into authorized_keys file";
 		if [ ${TEST} -eq 0 ]; then
-			cat "${ssh_keyfile_pub}" > /home/${user}/.ssh/authorized_keys;
+			if [ ! -z "${SSH_CENTRAL_AUTHORIZED_FILE_FOLDER}" ]; then
+				chattr -i ${SSH_AUTHORIZED_FILE};
+			fi;
+			cat "${ssh_keyfile_pub}" > ${SSH_AUTHORIZED_FILE};
 		else
-			echo "$> cat ${ssh_keyfile_pub} > /home/${user}/.ssh/authorized_keys";
+			if [ ! -z "${SSH_CENTRAL_AUTHORIZED_FILE_FOLDER}" ]; then
+				echo "$> chattr -i ${SSH_AUTHORIZED_FILE}";
+			fi;
+			echo "$> cat ${ssh_keyfile_pub} > ${SSH_AUTHORIZED_FILE}";
 		fi;
-		echo " > Secure folder .ssh and authorized_keys file";
-		if [ ${TEST} -eq 0 ]; then
-			chown -R ${user}:${group} /home/${user}/.ssh/;
-			chmod 700 /home/${user}/.ssh/;
-			chmod 600 /home/${user}/.ssh/authorized_keys;
+		# secure
+		if [ -z "${SSH_CENTRAL_AUTHORIZED_FILE_FOLDER}" ]; then
+			echo " > Secure home directory folder .ssh and authorized_keys file";
+			if [ ${TEST} -eq 0 ]; then
+				chown -R ${username}:${group} ${HOME_FOLDER}${username}/.ssh/;
+				chmod 700 ${HOME_FOLDER}${username}/.ssh/;
+				chmod 600 ${SSH_AUTHORIZED_FILE};
+			else
+				echo "$> chown -R ${username}:${group} ${HOME_FOLDER}${username}/.ssh/";
+				echo "$> chmod 700 ${HOME_FOLDER}${username}/.ssh/";
+				echo "$> chmod 600 ${SSH_AUTHORIZED_FILE}";
+			fi;
 		else
-			echo "$> chown -R ${user}:${group} /home/${user}/.ssh/";
-			echo "$> chmod 700 /home/${user}/.ssh/";
-			echo "$> chmod 600 /home/${user}/.ssh/authorized_keys";
+			echo " > Secure central authorized_keys file";
+			if [ ${TEST} -eq 0 ]; then
+				chown ${username}:root ${SSH_AUTHORIZED_FILE};
+				chmod 400 ${SSH_AUTHORIZED_FILE};
+				# set +i so user can't change file
+				chattr +i ${SSH_AUTHORIZED_FILE};
+			else
+				echo "$> chown ${username}:root ${SSH_AUTHORIZED_FILE}";
+				echo "$> chmod 400 ${SSH_AUTHORIZED_FILE}";
+				echo "$> chattr +i ${SSH_AUTHORIZED_FILE}";
+			fi;
 		fi;
 	fi;
 done;
@@ -267,24 +357,33 @@ if [ ${INFO} -eq 1 ]; then
 	exit;
 fi;
 # zip everything and remove data in ssh key folder, delete output file with passwords
-zip -r \
-	"${root_folder}${output_zip_folder}${output_zip}" \
-	"${input_file}" \
-	"${output_file}" \
-	"${ssh_keygen_folder}" \
-	-x\*.gitignore;
-echo "Download: ${root_folder}${output_zip_folder}${output_zip}";
+if [ ${TEST} -eq 0 ]; then
+	zip -r \
+		"${ROOT_FOLDER}${output_zip_folder}${output_zip}" \
+		"${input_file}" \
+		"${output_file}" \
+		"${SSH_KEYGEN_FOLDER}" \
+		-x\*.gitignore;
+else
+	echo "zip -r \\"
+	echo "${ROOT_FOLDER}${output_zip_folder}${output_zip} \\"
+	echo "${input_file} \\"
+	echo "${output_file} \\"
+	echo "${SSH_KEYGEN_FOLDER} \\"
+	echo "-x\*.gitignore;"
+fi;
+echo "Download: ${ROOT_FOLDER}${output_zip_folder}${output_zip}";
 # cleam up user log file and ssh keys
 if [ ${TEST} -eq 0 ]; then
 	# move pub to created folders
-	mv "${root_folder}${ssh_keygen_folder}"*.pub "${root_folder}${ssh_keygen_folder_created_pub}";
+	mv "${ROOT_FOLDER}${SSH_KEYGEN_FOLDER}"*.pub "${ROOT_FOLDER}${SSH_KEYGEN_FOLDER_CREATED_PUB}";
 	# delete the rest
-	rm "${root_folder}${output_file}";
-	rm "${root_folder}${ssh_keygen_folder}"*;
+	rm "${ROOT_FOLDER}${output_file}";
+	rm "${ROOT_FOLDER}${SSH_KEYGEN_FOLDER}"*;
 else
-	echo "$> mv ${root_folder}${ssh_keygen_folder}*.pub ${root_folder}${ssh_keygen_folder_created_pub};";
-	echo "$> rm ${root_folder}${output_file}";
-	echo "$> rm ${root_folder}${ssh_keygen_folder}*";
+	echo "$> mv ${ROOT_FOLDER}${SSH_KEYGEN_FOLDER}*.pub ${ROOT_FOLDER}${SSH_KEYGEN_FOLDER_CREATED_PUB};";
+	echo "$> rm ${ROOT_FOLDER}${output_file}";
+	echo "$> rm ${ROOT_FOLDER}${SSH_KEYGEN_FOLDER}*";
 fi;
 
 # __END__

bin/lock_user.sh

@@ -2,26 +2,36 @@
 
 # disable a user by removing them from the sshallow/sshforward group
 # and move them to the sshreject group
+# Note that call is ./lock_user.sh -t <user 1> <user 2> ...
+# if the -t is not in the first position it will be ignored
 
 # SET TO 1 to TEST [will not move user in groups]
-TEST=0; # no creation except ssh keys
-INFO=0; # no creation of anything, just print info strings
-while getopts ":ti" opt; do
+TEST=0; # no delete, just print
+while getopts ":t" opt; do
 	case "${opt}" in
 		t|test)
 			TEST=1;
 			;;
-		i|info)
-			INFO=1;
-			;;
 	esac;
 done;
+shift "$((OPTIND-1))"
+
+if [ $(whoami) != "root" ]; then
+	if [ ${TEST} -eq 0 ]; then
+		echo "Script must be run as root user";
+		exit;
+	else
+		echo "!!!! Script must be run as root user !!!!";
+	fi;
+fi;
 
 if [ $# -eq 0 ]; then
 	echo "Must give at least one user name";
 	exit;
 fi;
 
+# ignore users (root and admin users)
+ignore_users=('root' 'ec2-user' 'ubuntu' 'admin');
 # ssh reject group
 ssh_reject_group="sshreject";
 if [ -z $(cat /etc/group | grep "${ssh_reject_group}:") ]; then
@@ -30,20 +40,29 @@ if [ -z $(cat /etc/group | grep "${ssh_reject_group}:") ]; then
 fi;
 ssh_allow_group="sshallow";
 ssh_forward_group="sshfoward";
-delete_accounts="";
-user_group_tpl="gpasswd -d %s %s;gpasswd -a %s %s;";
+user_group_tpl="gpasswd -d %s %s\ngpasswd -a %s %s\n";
 
 echo "--------------------->"
 # $1 ... $n
 for username in "$@"; do
+	# skip if there is an option hidden
+	if [[ ${_arg:0:1} = "-" ]]; then
+		continue;
+	fi;
+	# skip ignore users, note that if a user is not in the sshallow list anyway
+	# we skip them too, this is just in case check
+	if [[ " ${ignore_users[*]} " =~ " ${username} " ]]; then
+		echo "[!] User $username is in the ignore user list";
+		continue;
+	fi;
 	# check that user exists in passwd
-	if [ -z $(cat /etc/passwd | grep "${username}:") ]; then
+	if ! id "${username}" &>/dev/null; then
 		echo "[!] User $username does not exists in /etc/passwd file";
 		continue;
 	fi;
 	# if not check if in reject list
-	if id -nGz "${username}" | grep -qzxF "${ssh_reject}"; then
-		echo "[.] User $username already in the ${ssh_reject} list";
+	if id -nGz "${username}" | grep -qzxF "${ssh_reject_group}"; then
+		echo "[.] User $username already in the ${ssh_reject_group} list";
 		continue;
 	fi;
 	# check if user is in sshallow/forward list
@@ -62,17 +81,16 @@ for username in "$@"; do
 	if [ ! -z "${ssh_remove_group}" ]; then
 		# remove user from ssh group and add to reject groups
 		echo "[*] User $username will be removed from ${ssh_remove_group}";
-		delete_accounts="${delete_accounts}"$(printf "${user_group_tpl}" "${username}" "${ssh_remove_group}" "${username}" "${ssh_reject_group}")$'\n';
+		if [ ${TEST} -eq 1 ]; then
+			printf "${user_group_tpl}" "${username}" "${ssh_remove_group}" "${username}" "${ssh_reject_group}";
+		else
+			gpasswd -d "${username}" "${ssh_remove_group}";
+			gpasswd -a "${username}" "${ssh_reject_group}";
+		fi;
 	else
 		# skip not ssh user
 		echo "[?] User $username not in any ssh allow/foward groups";
 	fi;
 done;
-if [ ! -z "${delete_accounts}" ]; then
-	echo "--------------------->"
-	echo "% Run list below to move users to reject ssh group";
-	echo "";
-	echo "${delete_accounts}";
-fi;
 
 # __END__

bin/unlock_user.sh

@@ -0,0 +1,114 @@
+#!/usr/bin/env bash
+
+# disable a user by removing them from the sshallow/sshforward group
+# and move them to the sshreject group
+# Note that call is ./lock_user.sh -t <user 1> <user 2> ...
+# if the -t is not in the first position it will be ignored
+
+# SET TO 1 to TEST [will not move user in groups]
+TEST=0; # no delete, just print
+SSH_GROUP_ADD='';
+while getopts ":ts:" opt; do
+	case "${opt}" in
+		t|test)
+			TEST=1;
+			;;
+		s|sshgroup)
+			if [ -z "${SSH_GROUP_ADD}" ]; then
+				SSH_GROUP_ADD=${OPTARG};
+			fi;
+			;;
+	esac;
+done;
+shift "$((OPTIND-1))"
+
+if [ $(whoami) != "root" ]; then
+	if [ ${TEST} -eq 0 ]; then
+		echo "Script must be run as root user";
+		exit;
+	else
+		echo "!!!! Script must be run as root user !!!!";
+	fi;
+fi;
+
+if [ $# -eq 0 ]; then
+	echo "Must give at least one user name";
+	exit;
+fi;
+
+if [ ! -z "${SSH_GROUP_ADD}" ] && [ "${SSH_GROUP_ADD}" != "allow" ] && [ "${SSH_GROUP_ADD}" != "forward" ]; then
+	echo "sshgroup option can only be 'allow' or 'forward'";
+	exit;
+fi;
+
+BASE_FOLDER=$(dirname $(readlink -f $0))"/";
+root_folder="${BASE_FOLDER}../";
+input_file='user_list.txt';
+# ignore users (root and admin users)
+ignore_users=('root' 'ec2-user' 'ubuntu' 'admin');
+# ssh reject group
+ssh_reject_group="sshreject";
+if [ -z $(cat /etc/group | grep "${ssh_reject_group}:") ]; then
+	echo "Missing ssh reject group: ${ssh_reject_group}";
+	exit;
+fi;
+ssh_allow_group="sshallow";
+ssh_forward_group="sshfoward";
+user_group_tpl="gpasswd -d %s %s\ngpasswd -a %s %s\n";
+
+echo "--------------------->"
+# $1 ... $n
+for username in "$@"; do
+	# skip if there is an option hidden
+	if [[ ${_arg:0:1} = "-" ]]; then
+		continue;
+	fi;
+	# skip ignore users, note that if a user is not in the sshallow list anyway
+	# we skip them too, this is just in case check
+	if [[ " ${ignore_users[*]} " =~ " ${username} " ]]; then
+		echo "[!] User $username is in the ignore user list";
+		continue;
+	fi;
+	# check that user exists in passwd
+	if ! id "${username}" &>/dev/null; then
+		echo "[!] User $username does not exists in /etc/passwd file";
+		continue;
+	fi;
+	# check if already in OK groups
+	if id -nGz "${username}" | grep -qzxF "${ssh_allow_group}"; then
+		echo "[.] User $username already in the ${ssh_allow_group} list";
+		continue;
+	fi;
+	if id -nGz "${username}" | grep -qzxF "${ssh_forward_group}"; then
+		echo "[.] User $username already in the ${ssh_forward_group} list";
+		continue;
+	fi;
+	# try to find user in user_list.txt and get the allow/forward flag from there,
+	# else try to set from option
+	# if not valid use allow
+	ssh_add_group="${SSH_GROUP_ADD}";
+	if [ -z "${SSH_GROUP_ADD}" ] && [ -f "${root_folder}${input_file}" ]; then
+		ssh_add_group=$(grep "${username}" "${root_folder}${input_file}" | cut -d ";" -f 4 | tr A-Z a-z | tr -d ' ');
+	fi;
+	if [ "${ssh_access_type}" != "allow" ] && [ "${ssh_access_type}" != "forward" ]; then
+		ssh_add_group="allow";
+	fi;
+	ssh_add_group="ssh${ssh_add_group}";
+
+	# check if user is in reject group remove
+	if id -nGz "${username}" | grep -qzxF "${ssh_reject_group}"; then
+		# remove user from ssh group and add to reject groups
+		echo "[*] User $username will be added to ${ssh_add_group}";
+		if [ ${TEST} -eq 1 ]; then
+			printf "${user_group_tpl}" "${username}" "${ssh_reject_group}" "${username}" "${ssh_add_group}";
+		else
+			gpasswd -d "${username}" "${ssh_reject_group}";
+			gpasswd -a "${username}" "${ssh_add_group}";
+		fi;
+	else
+		# skip not ssh user
+		echo "[?] User $username not in the ssh reject group";
+	fi;
+done;
+
+# __END__

config/.gitignore

@@ -0,0 +1,2 @@
+*
+!.gitignore

user_create_flow.md

@@ -0,0 +1,95 @@
+# AWS user create flow
+
+* Step 1: check if main group exists
+* Step 2: Add user to user_list.txt
+
+Example:
+
+```txt
+# 2022-12-12
+1;test.foo;group-a;allow
+```
+
+* Step 3: run create script in root/users `bin/create_user.sh`
+
+Not, if unsure use `-t` for testing or `-i` for info only.
+
+Example output for `-i`:
+
+```sh
+$> bin/create_user.sh -i
+User: 'test.foo:group-a();sshallow', SSH: hostname.com#grou-a#test.foo#ed25519.pem
+```
+
+Run output (example):
+
+```sh
+++ Create 'test.foo:group-a()'
+! Override password set
+ > Create ssh key-pair '/root/users/bin/../ssh-keygen/hostname.com#group-a#test.foo#ed25519.pem'
+Generating public/private ed25519 key pair.
+Your identification has been saved in /root/users/bin/../ssh-keygen/hostname.com#group-a#test.foo#ed25519.pem
+Your public key has been saved in /root/users/bin/../ssh-keygen/hostname.com#group-a#test.foo#ed25519.pem.pub
+The key fingerprint is:
+SHA256:IXiHXZrBGuMIHgU34L4DgAwLeFeX37AhQD69TOF1XZI hostname.com: test.foo@group-a
+The key's randomart image is:
++--[ED25519 256]--+
+|+ o++o+o+.o ...o.|
+|*o+..+o*+Bo.  E. |
+|++.+.o*+Xo =     |
+|... ..o* oo .    |
+|. .     S        |
+| . .             |
+|  o              |
+|   .             |
+|                 |
++----[SHA256]-----+
+ > Create .ssh folder
+ > Add public into authorized_keys
+ > Secure folder .ssh and authorized_keys file
+  adding: user_list.txt (stored 0%)
+  adding: user_password.20221202-094351.txt (stored 0%)
+  adding: ssh-keygen/ (stored 0%)
+  adding: ssh-keygen/hostname.com#group-a#test.foo#ed25519.pem (deflated 24%)
+  adding: ssh-keygen/hostname.com#group-a#test.foo#ed25519.pem.pub (deflated 2%)
+Download: /root/users/bin/../zip/users.20221202-094351.zip
+```
+
+* Step 4: Move the zip file to a folder where you can download it
+
+```sh
+$> mv /root/users/bin/../zip/users.20221202-094351.zip /home/<admin user>/
+```
+
+* Step 5: Download ZIP file to local computer and extract
+
+Overwrite user_list.txt file if it exists
+
+In the zup file there are the following files:
+
+* user_password.YYYYMMDD-HHmmss.txt (creation timestamp)
+* ssh-keygen/hostname#group#user#keytype.pem
+* ssh-keygen/hostname#group#user#keytype.pem.pub
+
+The .pem key has to be given to the user, the pub key is for reference only
+
+* Step 6: test login
+
+In the folder where the data was extracted
+
+```sh
+ssh -i ssh-keygen/hostname#group#user#keytype.pem user@hostname
+```
+
+Hand over to the user:
+
+* username
+* hostname
+* PEM key file
+* PEM key password
+
+If the password needs to be removed:
+
+```sh
+ssh-keygen -p -f ssh-keygen/hostname#group#user#keytype.pem -P <old password> -N ""
+```