Update create/delete scripts, add rename script

rename user script added: renames user, home dir and connected files.

delete script fix with remove of not needed options (-g)

Update all scripts to exit only after all errors are shown, unless it
is a critical run error.

Readme.md

@@ -256,3 +256,22 @@ The script can be put into the crontab and run once a month, it prints to STDOUT
 ```crontab
 0 2 1 * * root /root/users/bin/check_last_login.sh | mail -s "User Account check: $(hostname)"
 ```
+
+## Delete users
+
+`bin/delete_user.sh -t -b <user 1> <user 2> ...`
+
+Deletes one or more users
+
+- `-t` test, no action done
+- `-b` do not create a backup
+
+Unless `-b` is set the home folder and public key in /etc/ssh will be backed up.
+Flags user with #DELETED-YYYYMMDD_HHmmss:id;... in the user_list.txt file
+
+## Rename user
+
+`bin/rename_user.sh -t -o <current user name> -n <new user name>`
+
+Renames a user including the home directory, public key files and any other connected data.
+Also updates the user_list.txt

bin/create_user.sh

@@ -28,7 +28,7 @@
 TEST=0; # no actions will be run
 INFO=0; # no creation of anything, just print info strings
 GO=1; # without this flag the script will exit with an info box
-while getopts ":tih:" opt; do
+while getopts ":gtih:" opt; do
 	case "${opt}" in
 		g|go)
 			GO=1;
@@ -50,6 +50,7 @@ while getopts ":tih:" opt; do
 			;;
 	esac;
 done;
+error=0;
 # hostname for output file only
 host=$(hostname);
 timestamp=$(date +%Y%m%d-%H%M%S)
@@ -71,18 +72,22 @@ if [ ! -z "${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 (/): ${HOME_LOCATION}";
-		exit;
+		error=1;
 	fi;
 	# must be valid folder
 	if [ ! -d "${HOME_LOCATION}" ]; then
 		echo "Folder for home location does not exists: ${HOME_LOCATION}";
-		exit;
+		error=1;
 	fi;
 fi;
 # the new location for home, if override is set will be created in this folder
 HOME_FOLDER="${HOME_LOCATION}${HOME_BASE}"
 if [ ! -d "${HOME_FOLDER}" ]; then
 	echo "Home folder location not found: ${HOME_FOLDER}";
+	error=1;
+fi;
+# home dir error abort
+if [ $error -eq 1 ]; then
 	exit;
 fi;
 ROOT_FOLDER="${BASE_FOLDER}../";
@@ -123,18 +128,18 @@ fi;
 # if [ ! command -v pwgen &> /dev/null ]; then
 if [ -z $(command -v pwgen) ]; then
 	echo "Missing pwgen application, aborting";
-	exit;
+	error=1;
 fi;
 # check for zip
 # if [ ! command -v zip &> /dev/null ]; then
 if [ -z $(command -v zip) ]; then
 	echo "Missing zip application, aborting";
-	exit;
+	error=1;
 fi;
 # check if sshallow or sshfoward group exists
 if [ -z $(cat /etc/group | grep "sshallow:") ]; then
 	echo "Missing ssh access group: sshallow";
-	exit;
+	error=1;
 fi;
 # flag if we can set ssh forward
 if [ ! -z $(cat /etc/group | grep "sshforward:") ]; then
@@ -143,7 +148,7 @@ fi;
 # check if user list file exists
 if [ ! -f "${ROOT_FOLDER}${input_file}" ]; then
 	echo "Missing ${ROOT_FOLDER}${input_file}";
-	exit;
+	error=1;
 fi;
 # make sure my own folder is owned by root and 600 (except for testing)
 if [ $(stat -c %a .) != "600" ]; then
@@ -152,7 +157,7 @@ fi;
 if [ $(whoami) != "root" ]; then
 	if [ ${TEST} -eq 0 ] && [ ${INFO} -eq 0 ]; then
 		echo "Script must be run as root user";
-		exit;
+		error=1;
 	else
 		echo "!!!! Script must be run as root user !!!!";
 	fi;
@@ -162,6 +167,10 @@ fi;
 if [ $GO -eq 0 ]; then
 	echo "Script has to be run with -g option for actual user creation.";
 	echo "It is recommended to run -t for testing prior to user creation.";
+	error=1;
+fi;
+
+if [ $error -eq 1 ]; then
 	exit;
 fi;
 

bin/delete_user.sh

@@ -12,13 +12,9 @@
 # This will permaently remove the user
 
 TEST=0; # do not run any actions
-GO=1; # without this flag the script will exit with an info box
 BACKUP=1;
-while getopts ":tih:" opt; do
+while getopts ":tb" opt; do
 	case "${opt}" in
-		g|go)
-			GO=1;
-			;;
 		t|test)
 			TEST=1;
 			;;
@@ -53,7 +49,7 @@ fi;
 # check tar, bzip2 is installed if backup = 1
 
 host=$(hostname);
-timestamp=$(date +%Y%m%d-%H%M%S)
+timestamp=$(date +%Y%m%d-%H%M%S);
 # character to set getween info blocks
 separator="#";
 # base folder for all data
@@ -92,6 +88,7 @@ fi;
 
 # $1 ... $n
 for username in "$@"; do
+	error=0;
 	# skip if there is an option hidden
 	if [[ ${_arg:0:1} = "-" ]]; then
 		continue;
@@ -108,18 +105,18 @@ for username in "$@"; do
 	if ! id "${username}" &>/dev/null; then
 		# not in passwd
 		echo "[!!!] User ${username} does not exist in /etc/passwd";
-		if [ ${TEST} -eq 0 ]; then
+		error=1;
-			break;
-		fi;
 	fi;
 	user_list_entry=$(grep "${username}" "${user_list_file}");
 	if [ -z "${user_list_entry}" ]; then
 		echo "[!!!] User ${username} does not exist in user_list.txt file";
-		if [ ${TEST} -eq 0 ]; then
+		error=1;
-			break;
-		fi;
 	elif [[ "${user_list_entry}" =~ ^#DELETED ]]; then
 		echo "[!!!] User ${username} is flagged as deleted in user_list.txt file";
+		error=1;
+	fi;
+
+	if [ $error -eq 1 ]; then
 		if [ ${TEST} -eq 0 ]; then
 			break;
 		fi;

bin/rename_user.sh

@@ -4,22 +4,32 @@
 # - rename user name
 # - rename home folder + owner
 # - rename public key file in /etc/ssh/
+# - rename in user_list.txt
+# - rename created public key file
 
 TEST=0; # do not run any actions
-GO=1; # without this flag the script will exit with an info box
+OLD_USERNAME="";
-BACKUP=1;
+NEW_USERNAME="";
-while getopts ":tih:" opt; do
+while getopts ":to:n:" opt; do
 	case "${opt}" in
-		g|go)
-			GO=1;
-			;;
 		t|test)
 			TEST=1;
 			;;
+		o|old-user)
+			if [ -z "${OLD_USERNAME}" ]; then
+				OLD_USERNAME="${OPTARG}";
+			fi;
+			;;
+		n|new-user)
+			if [ -z "${NEW_USERNAME}" ]; then
+				NEW_USERNAME="${OPTARG}";
+			fi;
+			;;
 		\?)
 			echo -e "\n Option does not exist: ${OPTARG}\n";
 			echo "Use -t for test";
-			echo "Use -g for actually creation run";
+			echo "-o: Current user";
+			echo "-n: New username";
 			exit 1;
 			;;
 	esac;
@@ -35,9 +45,196 @@ if [ $(whoami) != "root" ]; then
 	fi;
 fi;
 
-if [ $# -eq 0 ]; then
+error=0;
-	echo "Must give at least one user name";
+host=$(hostname);
+timestamp=$(date +%Y%m%d-%H%M%S);
+# character to set getween info blocks
+separator="#";
+# base folder for all data
+BASE_FOLDER=$(dirname $(readlink -f $0))"/";
+root_folder="${BASE_FOLDER}../";
+SSH_KEYGEN_FOLDER_CREATED_PUB='ssh-keygen-created-pub/';
+input_file='user_list.txt';
+user_list_file="${root_folder}${input_file}";
+default_ssh_keytype='ed25519';
+ssh_keytype='';
+# log file
+LOG="${BASE_FOLDER}/../log/rename_user."$(date +"%F_%H%m%S");
+if [ ${TEST} -eq 0 ]; then
+	LOG="${LOG}.log";
+else
+	LOG="${LOG}.test.log";
+fi;
+# ignore users (root and admin users)
+ignore_users=('root' 'ec2-user' 'ubuntu' 'admin');
+# 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: ${SSH_CENTRAL_AUTHORIZED_FILE_FOLDER}";
+			error=1;
+		fi;
+	fi;
+done;
+if [ ! -f "${user_list_file}" ]; then
+	echo "${input_file} is missing";
+	error=1;
+fi;
+
+if [ -z "${OLD_USERNAME}" ] || [ -z "${NEW_USERNAME}" ]; then
+	echo "[!!!] Current and new username must be provided";
+	error=1;
+fi;
+
+if [ "${OLD_USERNAME}" = "${NEW_USERNAME}" ]; then
+	echo "[!!!] Current and new username cannot be the same";
+	error=1;
+fi;
+
+if ! [[ "${NEW_USERNAME}" =~ ^[a-z0-9]+([.a-z0-9_-]+[a-z0-9])?$ ]]; then
+	echo "User name can only be a-z 0-9 - _ . and cannot start or end with - . or _: ${NEW_USERNAME}";
+	error=1;
+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[*]} " =~ " ${OLD_USERNAME} " ]]; then
+	echo "[!] User ${OLD_USERNAME} is in the ignore user list";
+	error=1;
+fi;
+if [[ " ${ignore_users[*]} " =~ " ${NEW_USERNAME} " ]]; then
+	echo "[!] User ${NEW_USERNAME} is in the ignore user list";
+	error=1;
+fi;
+# user must exist in user_list.txt and /etc/passwd
+# if missing in or another do not continue
+if ! id "${OLD_USERNAME}" &>/dev/null; then
+	# not in passwd
+	echo "[!!!] User ${OLD_USERNAME} does not exist in /etc/passwd";
+	error=1;
+fi;
+if id "${NEW_USERNAME}" &>/dev/null; then
+	# not in passwd
+	echo "[!!!] User ${NEW_USERNAME} exists in /etc/passwd";
+	error=1;
+fi;
+if [ -f "${user_list_file}" ]; then
+	user_list_entry=$(grep "${OLD_USERNAME}" "${user_list_file}");
+	if [ -z "${user_list_entry}" ]; then
+		echo "[!!!] User ${OLD_USERNAME} does not exist in user_list.txt file";
+		error=1;
+	fi;
+	# if the old user exists but as DELETED -> no go
+	if [ ! -z $(echo "${user_list_entry}" | grep "#DELETED-") ]; then
+		echo "[!!!] User ${OLD_USERNAME} has been flagged as deleted";
+		error=1;
+	fi;
+	# if new user name already exists in user list file for whatever reason
+	if [ $(grep "${NEW_USERNAME}" "${user_list_file}") ]; then
+		echo "[!!!] User ${NEW_USERNAME} exists in user_list.txt file";
+		error=1;
+	fi;
+fi;
+# exit on any error
+if [ $error -eq 1 ]; then
 	exit;
 fi;
 
+# parse user list entry for group/hostname/ssh type key to build ssh key list
+
+# POS 3: groups
+_group=$(echo "${user_list_entry}" | cut -d ";" -f 3 | tr A-Z a-z | tr -d ' ');
+group=$(echo "${_group}" | cut -d "," -f 1);
+# POS 6: override host name, lowercase and spaces removed
+_hostname=$(echo "${user_list_entry}" | cut -d ";" -f 6 | tr A-Z a-z | tr -d ' ');
+if [ -z "${_hostname}" ]; then
+	hostname=${host};
+else
+	hostname=${_hostname};
+fi;
+# POS 7: ssh keytype override
+_ssh_keytype=$(echo "${user_list_entry}" | cut -d ";" -f 7 | tr A-Z a-z | tr -d ' ');
+if [ "${_ssh_keytype}" = "rsa" ]; then
+	ssh_keytype="${_ssh_keytype}";
+else
+	ssh_keytype=${default_ssh_keytype};
+fi;
+
+echo "* Rename ${OLD_USERNAME} to ${NEW_USERNAME}";
+
+old_home_dir=$(getent passwd "${OLD_USERNAME}" | cut -d: -f6);
+new_home_dir=$(echo "${old_home_dir}" | sed -e "s/\/${OLD_USERNAME}$/\/${NEW_USERNAME}/");
+# rename user
+if [ $TEST -eq 0 ]; then
+	echo "usermod with ${new_home_dir}";
+	usermod -l ${NEW_USERNAME} -m -d "${new_home_dir}" ${OLD_USERNAME};
+else
+	echo "$> usermod -l ${NEW_USERNAME} -m -d \"${new_home_dir}\" ${OLD_USERNAME};";
+fi
+# check that home folder is renamed and owned by new user
+
+# check if spool exists
+if [ -f "/var/spool/mail/${OLD_USERNAME}" ]; then
+	if [ $TEST -eq 0 ]; then
+		echo "rename to /var/spool/mail/${NEW_USERNAME}";
+		mv "/var/spool/mail/${OLD_USERNAME}" "/var/spool/mail/${NEW_USERNAME}";
+	else
+		echo "$> mv \"/var/spool/mail/${OLD_USERNAME}\" \"/var/spool/mail/${NEW_USERNAME}\";";
+	fi
+fi;
+# check if crontab exists
+if [ -f "/var/spool/cron/crontabs/${OLD_USERNAME}" ]; then
+	if [ $TEST -eq 0 ]; then
+		echo "rename to /var/spool/cron/crontabs/${NEW_USERNAME}";
+		mv "/var/spool/cron/crontabs/${OLD_USERNAME}" "/var/spool/cron/crontabs/${NEW_USERNAME}";
+	else
+		echo "$> mv \"/var/spool/cron/crontabs/${OLD_USERNAME}\" \"/var/spool/cron/crontabs/${NEW_USERNAME}\";";
+	fi
+fi;
+
+# public key files user must be renamed
+OLD_SSH_AUTHORIZED_FILE="${SSH_CENTRAL_AUTHORIZED_FILE_FOLDER}${OLD_USERNAME}";
+NEW_SSH_AUTHORIZED_FILE="${SSH_CENTRAL_AUTHORIZED_FILE_FOLDER}${NEW_USERNAME}";
+
+if [ -f "${OLD_SSH_AUTHORIZED_FILE}" ]; then
+	if [ $TEST -eq 0 ]; then
+		echo "rename to ${NEW_SSH_AUTHORIZED_FILE}";
+		chattr -i "${OLD_SSH_AUTHORIZED_FILE}";
+		mv "${OLD_SSH_AUTHORIZED_FILE}" "${NEW_SSH_AUTHORIZED_FILE}";
+		chattr +i "${NEW_SSH_AUTHORIZED_FILE}";
+	else
+		echo "$> chattr -i \"${OLD_SSH_AUTHORIZED_FILE}\";";
+		echo "$> mv \"${OLD_SSH_AUTHORIZED_FILE}\" \"${NEW_SSH_AUTHORIZED_FILE}\";";
+		echo "$> chattr +i \"${NEW_SSH_AUTHORIZED_FILE}\";";
+	fi;
+else
+	echo "[?] ${OLD_SSH_AUTHORIZED_FILE} is missing";
+fi;
+
+# rename keygen public file
+OLD_ssh_keygen_pub="${ROOT_FOLDER}${SSH_KEYGEN_FOLDER_CREATED_PUB}${hostname}${separator}${group}${separator}${OLD_USERNAME}${separator}${ssh_keytype}.pem.pub";
+NEW_ssh_keygen_pub="${ROOT_FOLDER}${SSH_KEYGEN_FOLDER_CREATED_PUB}${hostname}${separator}${group}${separator}${NEW_USERNAME}${separator}${ssh_keytype}.pem.pub";
+
+if [ -f "${OLD_ssh_keygen_pub}" ]; then
+	if [ $TEST -eq 0 ]; then
+		echo "rename to ${NEW_ssh_keygen_pub}";
+		mv "${OLD_ssh_keygen_pub}" "${NEW_ssh_keygen_pub}";
+	else
+		echo "$> mv \"${OLD_ssh_keygen_pub}\" \"${NEW_ssh_keygen_pub}\";";
+	fi;
+else
+	echo "[?] ${OLD_ssh_keygen_pub} is missing";
+fi;
+
+# rename entry in user list txt file
+if [ $TEST -eq 0 ]; then
+	echo "update ${user_list_file}";
+	sed -i -e "s/^\([A-Za-z0-9]\{1,\}\);${OLD_USERNAME};/\1;${NEW_USERNAME};/" "${user_list_file}";
+else
+	echo "$> sed -i -e \"s/^\([A-Za-z0-9]\{1,\}\);${OLD_USERNAME};/\1;${NEW_USERNAME};/\" \"${user_list_file}\";";
+fi;
+
 # __END__