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38 Commits

Author SHA1 Message Date
Clemens Schwaighofer
fa3c4e0c6e Bug in user create test output
Missing ! for central ssh authorized_file check in pub key update flow
2023-04-05 13:27:05 +09:00
Clemens Schwaighofer
ebf0eaf412 Bug fixes in user create for new ssh key central location
* Bug with existing ssh key but not in ssh authorized_file
The correct public key location was not set for the existing file

* Bug with attr set on authorzied_file update if central location
If a central location the +i attrib must be removed first
It will set always in the folder rights change

* Change the authorized file group to root for central file location
2023-04-05 13:24:15 +09:00
Clemens Schwaighofer
190b12b288 add missing check central ssh auth file folder exists 2023-04-05 11:29:46 +09:00
Clemens Schwaighofer
3a42c521f6 Add central ssh authorized_keys file detect, fixes for home folder create
* new detect for central authorized keys folder
1) must have %u set in the AuthorizedKeysFile list
2) folder must exists (will not be created, if not exists abort)

If above is set, it will create a username file with the ssh key in there
and lock it down as r--/user and +i attrib

else uses old .ssh folder form

* fix for user add with different home base folder
add this as option for the useradd command
2023-04-05 11:24:37 +09:00
Clemens Schwaighofer
61a8bca3d7 Allow /home to have a different base location
If /home is eg located in /storge then we can now set a prefix for this.

Option -h or via config setting in "user_create.cfg" named
HOME_LOCATION="/path"

Note: Path has to be prefix with /. Any sub folders in home will be
ignored and the user is always created in /home/user.name
Group names as sub folders in /home are not supported
2023-03-29 10:57:48 +09:00
Clemens Schwaighofer
a0e7347033 Do not run zip command when test flag is set 2023-03-23 13:52:32 +09:00
Clemens Schwaighofer
c58b0ea7a4 Add wildcard to user list txt file to also ignore TEST created files 2023-02-17 16:57:10 +09:00
Clemens Schwaighofer
fb00036ab9 Abort on invalid option, always set ssh keytype so it doesn't stay on last selected 2023-01-31 13:29:00 +09:00
Clemens Schwaighofer
8808b94413 Add user create flow document 2022-12-02 10:05:40 +09:00
Clemens Schwaighofer
1fbc6c8125 Update password key length to 14 characters 2022-12-02 10:02:40 +09:00
Clemens Schwaighofer
87d53cdb13 Create user bug with positions in list file 2022-12-02 09:59:39 +09:00
Clemens Schwaighofer
716a0c2bfb Fix root/base folder problem 2022-12-02 09:41:25 +09:00
Clemens Schwaighofer
365b52efe5 Bug fix with user_list.txt variable in wrong script. Must be in unlock script not check script 2022-12-02 09:32:27 +09:00
Clemens Schwaighofer
b10cb62612 Fix unlock script with debug comment out code 2022-12-02 09:28:09 +09:00
Clemens Schwaighofer
1f4e295e9f Update lock script, add unlock script, minor updates in other scripts
Make sure that lock script reejcts core users
(root/ec2-user/admin/ubuntu)

Unlock script works reverse with also optional check in user_list.txt
for ssh allow/foward group type

Internal:
rename all $user to $username
2022-12-02 09:26:51 +09:00
Clemens Schwaighofer
ebddac7f67 Rename script names, add lock script
Add a user lock script to move users from ssh allow/foward group to ssh
reject group.

Rename user_create.sh script to create_user.sh script and add new ssh
allow/foward flag in user_list.txt file after group block and before
password name block

Update check last login script with better add/remove from groups
2022-12-01 18:22:46 +09:00
Clemens Schwaighofer
fe08fa10c2 Add multiple groups to check last login script
Currently fixed group names sshallow, sshforward and reject sshreject
2022-12-01 06:43:43 +09:00
Clemens Schwaighofer
6e53d1bdec Update collector script with debug output, list rejected ssh users
In the check script print out current rejected (not allowed) ssh users

Collect log info script has now debug output and proper options flags
2022-11-22 09:33:52 +09:00
Clemens Schwaighofer
cae5c8a19a Fix systemd read for dates with short-iso to get proper year date 2022-11-21 18:37:34 +09:00
Clemens Schwaighofer
aa0594e17f Fix for different log output and missing different cut flow in function 2022-11-21 18:29:47 +09:00
Clemens Schwaighofer
16e6b98399 Start year fix for log file parsing 2022-11-21 18:19:03 +09:00
Clemens Schwaighofer
424277ff2e Move log parsing to function because it is the same for all check types 2022-11-21 17:58:31 +09:00
Clemens Schwaighofer
ede5f1a2b8 Add full log scan for old non systemd auth checks 2022-11-21 17:41:27 +09:00
Clemens Schwaighofer
27516a6474 Add auth data collector and update check last login script
Auth collector from either systemd logger or fallback /var/log/secure
(old Amazon V1).

Use this as primary last login source in check last login script
2022-11-21 16:38:54 +09:00
Clemens Schwaighofer
9f61b3c523 Switch to different zip/pwgen exists bash check 2022-11-04 10:43:47 +09:00
Clemens Schwaighofer
54f4d69da6 Remove wrong exit in user create script 2022-11-04 10:35:58 +09:00
Clemens Schwaighofer
5db69276db Add Hostname to the check user data script 2022-11-03 14:02:47 +09:00
Clemens Schwaighofer
74bfded26f Add logging to check last login script
Logging of all output to log/ folder for check last login script user.
Also for delete, user script now outputs move from ssh allow to ssh
reject group.
2022-11-02 16:04:26 +09:00
Clemens Schwaighofer
37f9f4429d check users do not show delete from group if nothing has to be done 2022-11-02 15:16:22 +09:00
Clemens Schwaighofer
94a970d54b Update check user script output on problems 2022-11-02 15:11:26 +09:00
Clemens Schwaighofer
c09e8cf799 AWS accunt scripts, deploy akamai scripts
A new last logged in, last created script has been added to check which
users we have to disable.
- checks in group sshallow
- if last login older than 60days, remove account from ssh group
- if we have account create date, check if never logged in and older
  than 30 days, remove account from ssh group
Both dates can be set separate

Update create script to add create date in Y-m-d (%F) format as
comment to the passwd file
Also add user to sshallow group (group always exists, is created on
server creation)
2022-11-02 15:02:17 +09:00
Clemens Schwaighofer
a15541c86b Fix pub key check for info display 2022-03-28 15:01:46 +09:00
Clemens Schwaighofer
12d8d57bd2 Moved script into wrong folder 2022-03-28 14:58:42 +09:00
Clemens Schwaighofer
18b544a1a4 More info on -i flag 2022-03-28 14:56:16 +09:00
Clemens Schwaighofer
4914e3f367 Update documentation in user create script
Still used old key value separator and was missing new added
user_list.txt file blocks
2022-03-15 14:18:04 +09:00
Clemens Schwaighofer
12ef307bdb Remove alert text if RSA type was selected 2022-03-10 11:14:53 +09:00
Clemens Schwaighofer
d13dd08855 Update -t test option flow, added -i info option
-t test will NOT create an ssh key anymore. The user password list file
gets a .TEST extension

-i info is a new option to just show user/group and ssh key name without
creating anything at all.
Can be used to update old public key names to new format
2022-03-10 11:12:18 +09:00
Clemens Schwaighofer
2e8c30a704 Minor readme updates 2022-03-09 17:42:16 +09:00
13 changed files with 1063 additions and 234 deletions

2
.gitignore vendored
View File

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

View File

@@ -16,25 +16,40 @@ chown root. users
chgrp 600 users
```
Alternate download: `git clone http://gitlab-ap.factory.tools/scripts-collections/aws-user-create.git users`
## Folders
Inside the base folder there are
* ssh-keygen for temporary holding the PEM/PUB files
* zip file which holds the created user list, password and PEM/PUB files
## Options
### -t (test)
Run in test mode. This will *NOT* create any groups or users. Nor will it create any ssh key files.
`user_password` output file will be written with `.TEST` extension
### -i (info)
Do not created anything at all, just print out info strings
## User list creation
In the `/root/users/` folder there needs to be a file called '*user_list.txt*'
This is a CSV type file with the following layout
ID | Username | Group | Optional Password | Override host name
-|-|-|-|-
ID | Username | Group | Optional Password | Override host name | Override ssh key type
-|-|-|-|-|-
The ID, Username and Group column must be filled.
For sub groups add them with a *,* The first group is the master group
If the password column is filled, the string from here will be used as the PEM Key password.
If a override hostname is set it will be used instead of `hostname`
If the ssh key type is set, it will override the default *ed25519* type. This is not recommended. Only *rsa* is allowed. This is for setting up backwards compatible lists.
The ID can be any string in any form.
It can also be left empty. It is not used at the moment
@@ -42,7 +57,8 @@ It can also be left empty. It is not used at the moment
The file can hold comments. The first character in the line must be a *#*
Example file
```
```csv
user1;some.name;group-a;;hostname
user2;othername;group-a;;
# I am a comment
@@ -82,10 +98,11 @@ The current directory **MUST** be the directory where '*user_list.txt*' is store
Then run the script without any options
`$> /root/bin/user_create.sh`
`$> /root/bin/create_user.sh`
Sample output for above example file
```
```txt
++ Create 'some.name:group-a'
> Create ssh key-pair '/root/users/ssh-keygen/hostname#group-a#some.name#ed25519.pem'
Generating public/private rsa key pair.
@@ -111,7 +128,8 @@ The key's randomart image is:
```
If the public pem file is already provided the output will be a bit different
```
```txt
++ Create 'some.name:group-a'
< Use existing public ssh key '/root/users/ssh-keygen/hostname#group-a#some.name#ed25519.pem.pub'
> Create .ssh folder
@@ -122,16 +140,18 @@ If the public pem file is already provided the output will be a bit different
There is no SSH key generate output but *Use existing public ssh key* information line
If the user has been created, the creating will be skipped
```
```txt
-- Skip 'some.name:group-a'
```
## Script output
The generated users and the passwords are stored in the '*user_password.txt*' file
The generated users and the passwords are stored in the '*user_password.YYYYMMDD-hhmmss.txt*' file
For above the output will be
```
```csv
2020-11-27 13:51:01;sever.hostname.org;hostname;some.name;Aeh9uph8Oo
2020-11-27 13:51:02;sever.hostname.org;;othername;AePejoo9ch
2020-11-27 13:51:02;sever.hostname.org;;username;setpassword
@@ -141,7 +161,8 @@ Note that the *sever.hostname.org* is set from the hostname of the server where
The name *hostname* is set if the hostname field in hser `user_list.txt` file is set
If a existing pem public key is used, the entry for a new user will be
```
```csv
2020-11-27 13:53:18;sever.hostname.org;;some.name;[ALREADY SET]
```
@@ -154,6 +175,10 @@ This file should be copied localy and then removed from the server
**NOTE** Do not remove the public key data in `ssh-keygen-created-pub/` or the script will create new keys for users in the `user_list.txt` file
## SSH helper
change password or extract public key from pem file
### PEM key password reset
The SSH PEM key password can be reset or changed with
@@ -163,7 +188,6 @@ The SSH PEM key password can be reset or changed with
To remove the password use this `-N ""`
**NOTE**
If the command is used like this it will be stored in the history file.
For scurity reason it is recommended to not give the -P and -N options when changing the password.
@@ -174,3 +198,54 @@ The public key part can be extracted from the SSH PEM key with
`$> ssh-keygen -y -f [PEM].pem > [PEM].pem.pub`
*[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.
Because of users who do not open shells (for example sftp users) we cannot rely on lastlog, so a script called `collect_login_data.sh` exists that parses the systemd logind info or /var/log/secure for user authentication data.
Data is stored in `auth-log/user_auth.log` folder as `user;last login date`
This script should be run every day via crontab as root:
```crontab
0 1 * * * root /root/users/bin/collect_login_data.sh
```
The script `check_last_login.sh` will go through the ssh allow groups (sshallow/sshforward) users and flag out those that have not logged in, in the last 60 days and recommend to lock them. The script will also check for user accounts that never logged in and where created in the last 30 days and recomment to lock them too.
This script will first check the `auth-log/user_auth.log` file, then lastlog output and finally check for creation time in passwd file or home director for when the user was created.
Currently only information is printed out and no action is done itself.
The script can be put into the crontab and run once a month, it prints to STDOUT so a mail pipe with a proper subject is recommended
```crontab
0 2 1 * * root /root/users/bin/check_last_login.sh | mail -s "User Account check: $(hostname)"
```

2
auth-log/.gitignore vendored Normal file
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@@ -0,0 +1,2 @@
*
!.gitignore

135
bin/check_last_login.sh Executable file
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@@ -0,0 +1,135 @@
#!/usr/bin/env bash
# Checks for last access of users in sshallow group
# if user login >30days, remoe user from sshallow group and write log
# base folder
BASE_FOLDER=$(dirname $(readlink -f $0))"/";
# which groups holds the ssh allowed login users (outside of admin users)
ssh_groups=('sshforward' 'sshallow');
ssh_reject_group='sshreject';
# date now for compare
now=$(date +"%s");
# max age for last login or account create without login
max_age_login=60;
max_age_create=30;
# one day in seconds
day=86400;
# delete account strings
delete_accounts="";
user_group_tpl="gpasswd -d %s %s;gpasswd -a %s %s;";
# log base folder
LOG="${BASE_FOLDER}/../log";
# auth log file user;date from collect_login_data script
AUTH_LOG="${BASE_FOLDER}/../auth-log/user_auth.log";
if [ $(whoami) != "root" ]; then
echo "Script must be run as root user";
exit;
fi;
if [ ! -d "${LOG}" ]; then
echo "log folder ${LOG} not found";
exit;
fi;
LOG="${LOG}/check_ssh_user."$(date +"%F_%H%m%S")".log";
exec &> >(tee -a "${LOG}");
echo "[START] =============>";
echo "Hostname : "$(hostname);
echo "Run date : "$(date +"%F %T");
echo "Max age last login: ${max_age_login} days";
echo "Max age no login : ${max_age_create} days";
for ssh_group in ${ssh_groups[@]}; do
echo "--------------------->"
echo "Checking Group : ${ssh_group}";
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 ${username}";
# check user create time, if we have set it in comment
user_create_date=$(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 ${username} | cut -d " " -f 3);
fi;
# last try is user home .bash_logout
if [ -z "${user_create_date}" ]; then
home_dir=$(cat /etc/passwd | grep "${username}:" | cut -d ":" -f 6)"/.bash_logout";
user_create_date=$(stat -c %Z "${home_dir}");
fi;
# below only works if the user logged in, a lot of them are just file upload
# 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 ${username} | sed 1d);
search="Never logged in";
found="";
# problem with running rep check in if
if [ -f "${AUTH_LOG}" ]; then
found=$(grep "${username};" "${AUTH_LOG}");
fi;
if [ ! -z "${found}" ]; then
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 ${last_login} days ago";
delete_user=1;
else
out_string="OK [ssh]";
fi;
elif [ ! -z "${last_login_string##*$search*}" ]; then
# if we have "** Never logged in**" the user never logged in
# find \w{3} \w{3} [\s\d]{2} \d{2}:\d{2}:\d{2} \+\d{4} \d{4}
# awk '{for(i=4;i<=NF;++i)printf $i FS}'
last_login_date=$(echo "${last_login_string}" | awk '{for(i=4;i<=NF;++i)printf $i FS}' | date +"%s" -f -);
# date -d "Wed Nov 2 09:40:35 +0900 2022" +%s
last_login=$(awk '{printf("%.0f\n",($1-$2)/$3)}' <<<"${now} ${last_login_date} ${day}");
if [ ${last_login} -gt ${max_age_login} ]; then
out_string="[!] last terminal log in ${last_login} days ago";
delete_user=1;
else
out_string="OK [lastlog]";
fi;
elif [ ! -z "${user_create_date}" ]; then
user_create_date=$(echo "${user_create_date}" | date +"%s" -f -);
# if all empty, we continue with only check if user has last login date
# else get days since creation
#account_age=$[ ($(date +"%s")-$(date -d "${user_create_date}" +"%s"))/24 ];
account_age=$(awk '{printf("%.0f\n",($1-$2)/$3)}' <<<"${now} ${user_create_date} ${day}");
if [ ${account_age} -gt ${max_age_create} ]; then
out_string="[!] Never logged in, account created ${account_age} days ago";
delete_user=1;
else
out_string="OK [first login]";
fi;
else
out_string="[!!!] Never logged in and we have no create date";
fi;
# build delete output
if [ ${delete_user} = 1 ]; then
delete_accounts="${delete_accounts}"$(printf "${user_group_tpl}" "${username}" "${ssh_group}" "${username}" "${ssh_reject_group}")$'\n';
fi;
printf "* Checking user %-20s: %s\n" "${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 "${username}";
done;
if [ ! -z "${delete_accounts}" ]; then
echo "--------------------->"
echo "% Run list below to move users to reject ssh group";
echo "";
echo "${delete_accounts}";
fi;
echo "[END] ===============>"
# __END__

140
bin/collect_login_data.sh Executable file
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@@ -0,0 +1,140 @@
#!/usr/bin/env bash
# * check we are root
# if we are not root, bail out
# if [ $(whoami) != "root" ]; then
if [[ "$EUID" -ne "0" ]]; then
echo "Must be run as root or with sudo command";
exit;
fi;
# base folder
BASE_FOLDER=$(dirname $(readlink -f $0))"/";
# auth log file
AUTH_LOG="${BASE_FOLDER}/../auth-log/user_auth.log";
if [ ! -f "${AUTH_LOG}" ]; then
touch "${AUTH_LOG}";
fi;
# debug flag
DEBUG=0;
# check all logs flag
RUN_FULL_LOG=0;
# option parsing
while getopts ":fd" opt; do
case "${opt}" in
f|full)
echo "[!!!] Run through all log files to collect data";
RUN_FULL_LOG=1;
;;
d|deubg)
DEBUG=1;
;;
esac;
done;
function prD()
{
message="${1}";
debug=${2:-0};
lb_off=${3:-0};
if [ ${debug} -eq 1 ]; then
if [ ${lb_off} -eq 1 ]; then
echo -n "${message}";
else
echo "${message}";
fi;
fi;
}
function parseLog()
{
# do we have a key entry, if not add new with last log date
# clean up date from YYYY nam dd to YYYY-MM-DD HH:II:SS
line="${1}";
auth_log="${2}";
start_year="${3}";
logger="${4}";
debug=${5:-0};
#prD "Line: $line" ${debug};
# auth user has . at the end, remove that one
if [ "${logger}" = "systemd" ]; then
# 2022-11-18T20:04:08+0900
auth_date=$(echo "${line}" | cut -d " " -f 1);
auth_user=$(echo "${line}" | cut -d "]" -f 2 | cut -d " " -f 7 | cut -d "." -f 1);
else
auth_date=$(echo "${line}" | cut -c 1-6)" ${start_year} "$(echo "${line}" | cut -c 8-15);
auth_user=$(echo "${line}" | cut -d ")" -f 2 | cut -d " " -f 6 | cut -d "(" -f 1);
fi;
auth_date=$(echo "${auth_date}" | date +"%F %T" -f -);
# $(printf "USER: %-20s: %19s" "${auth_user}" "${auth_date}")
# prD "USER: $auth_user | DATE: $auth_date" ${debug} 1;
printf -v msg "Source: %-10s | Year: %4s | Last auth user: %-20s: %19s" "${logger}" "${start_year}" "${auth_user}" "${auth_date}"
prD "${msg}" ${debug} 1;
# find auth user in current auth file
# if not there attach, else replace date only
found=$(grep "${auth_user};" "${auth_log}");
if [ -z "${found}" ]; then
prD " | Write new" ${debug};
echo "${auth_user};${auth_date}" >> "${auth_log}";
else
prD " | Replace old" ${debug};
sed -i "s/${auth_user};.*$/${auth_user};${auth_date}/" "${auth_log}";
fi;
}
printf -v msg "Run date: %s %s" $(date +"%F %T")
prD "${msg}" ${DEBUG};
# Collector script for login information via journalctl
# if no systemd installed, try to get info from /var/log/secure or /var/log/auth.log
readonly init_version=$(/proc/1/exe --version | head -n 1);
if [ -z "${init_version##*systemd*}" ]; then
LOG_TARGET="systemd";
# for journalctl
START_DATE=$(date +%F -d "1 day ago");
END_DATE=$(date +%F);
OPT_START_DATE='';
if [ $RUN_FULL_LOG -eq 0 ]; then
OPT_START_DATE="-S ${START_DATE}";
OPT_END_DATE="-U ${END_DATE}";
fi;
# READ as other format so we get the YEAR -o short-iso
START_YEAR=$(date +%Y -d "1 day ago");
journalctl -u systemd-logind --no-pager -o short-iso ${OPT_START_DATE} ${OPT_END_DATE} | grep ": New session" |
while read line; do
# # Nov 21 14:15:46 we.are.hostname.com systemd-logind[1865]: New session 12345 of user some^user.
# date: 5 chars
# time: 8 chars
# hostname
# systemd-logind pid ...
# " of user <username>"
# we want date + time + username
# prefix year with start date year
parseLog "${line}" "${AUTH_LOG}" "${START_YEAR}" "${LOG_TARGET}" ${DEBUG};
done;
else
LOG_TARGET="syslog";
# for secure/auth log
if [ $RUN_FULL_LOG -eq 1 ]; then
# we loop over EACH file and get the DATE so we can have the correct YEAR
for sfile in $(ls -1 /var/log/secure*bz2); do
tz=$(stat -c %Z "${sfile}");
START_YEAR=$(date +%Y -d @${tz});
bunzip2 -ck "${sfile}" | grep ": session opened for user" | grep " by (uid=0)" |
while read line; do
parseLog "${line}" "${AUTH_LOG}" "${START_YEAR}" "${LOG_TARGET}" ${DEBUG};
done;
done;
# read all
START_DATE="sshd"
fi;
START_YEAR=$(date +%Y -d "1 day ago");
cat /var/log/secure | grep "${START_DATE}" | grep ": session opened for user" | grep " by (uid=0)" |
while read line; do
parseLog "${line}" "${AUTH_LOG}" "${START_YEAR}" "${LOG_TARGET}" ${DEBUG};
done;
fi;
# __END__

389
bin/create_user.sh Executable file
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@@ -0,0 +1,389 @@
#!/usr/bin/env bash
# * input file
# user_list.txt
# <ignored id>;<user name>;<group>[,sub group,sub group];<ssh access type>;[override password];[override hostname];[override ssh key type]
# lines with # are skipped
# already created users are skipped
# Mandatory: <ignored id>;<user name>;<group>;<ssh access type>
# <ssh access type> can be
# allow (full login access)
# forward (forward/jump host only)
# * output file
# <date>;<target connect host name>;<hostname>;<username>;<password>;<ssh access type>
# If already existing PEM key is used then <password> is [ALREADY SET]
#
# * PEM KEY
# <hostname>#<group>#<user>#<ssh key type>.pem
# * PUBLIC KEY
# <hostname>#<group>#<user>#<ssh key type>.pem.pub
# stored as zip in
# zip/
#
# If a previously exsting PEM key should be used, put the public pem file
# into the ssh-keygen/ folder
# They pem pub key must follow the set rules above
# 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 ":tih:" opt; do
case "${opt}" in
t|test)
TEST=1;
;;
i|info)
INFO=1;
;;
h|home)
HOME_LOCATION="${OPTARG}";
;;
\?)
echo -e "\n Option does not exist: ${OPTARG}\n";
echo "Use -t for test and -i for info";
echo "Override default /home/ folder location with -h <base>";
exit 1;
;;
esac;
done;
# hostname for output file only
host=$(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 $0))"/";
# home folder is always thome
HOME_BASE="/home/";
# config location
CONFIG_BASE="${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/';
# 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}${SSH_KEYGEN_FOLDER}";
fi;
# check if zip folder is missing
if [ ! -d "${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
if [ -z $(command -v pwgen) ]; then
echo "Missing pwgen application, aborting";
exit;
fi;
# check for zip
# if [ ! command -v zip &> /dev/null ]; then
if [ -z $(command -v zip) ]; then
echo "Missing zip application, aborting";
exit;
fi;
# check if sshallow or sshfoward group exists
if [ -z $(cat /etc/group | grep "sshallow:") ]; then
echo "Missing ssh access group: sshallow";
exit;
fi;
# flag if we can set ssh forward
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}";
exit;
fi;
# make sure my own folder is owned by root and 600 (except for testing)
if [ $(stat -c %a .) != "600" ]; then
echo "!!!! RECOMMENDED TO HAVE BASE FOLDER SET TO '600' AND USER 'root' !!!!"
fi;
if [ $(whoami) != "root" ]; then
if [ ${TEST} -eq 0 ] && [ ${INFO} -eq 0 ]; then
echo "Script must be run as root user";
exit;
else
echo "!!!! Script must be run as root user !!!!";
fi;
fi;
# create users
cat "${ROOT_FOLDER}${input_file}" |
while read i; do
# skip rows start with # (comment)
if [[ "${i}" =~ ^\# ]]; then
continue;
fi;
# 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
echo "[!!] Not valid ssh access type ${ssh_access_type}, set to allow";
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 ${username}";
break;
fi;
ssh_group="ssh${ssh_access_type}";
# sshallow group is always added
sub_group_opt=" -G ${ssh_group}";
# check if "," inside and extract sub groups
if [ -z "${_group##*,*}" ]; then
sub_group=$(echo "${_group}" | cut -d "," -f 2-);
sub_group_opt=" -G ${sub_group}";
fi;
# POS 5: do we have a password preset
_password=$(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;
# 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=${default_ssh_keytype};
fi;
# user & group not set
if [ -z "${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}${username}${separator}${ssh_keytype}.pem";
# the full file including folder name
ssh_keyfile="${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";
if [ ${INFO} -eq 1 ]; then
# test if pub file exists or not, test if user exists
echo -n "User: '${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
echo -n ", SSH Pub key OK";
fi;
# line break
echo "";
continue;
fi;
# add group for each entry in _group
for create_group in ${_group//,/ }; do
if [ ${TEST} -eq 0 ]; then
groupadd -f ${create_group};
else
echo "$> groupadd -f ${create_group}";
fi;
done;
# check if user is not already created
# if getent passwd ${username} > /dev/null 2>&1; then
if id "${username}" &>/dev/null; then
echo "-- Skip '${username}:${group}(${sub_group})'";
else
echo "++ Create '${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} -d "${HOME_FOLDER}" -m ${username};
else
echo "$> 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" $(pwgen 14 1));
else
echo "! Override password set";
password=${_password};
fi;
# create SSH key
echo " > Create ssh key-pair '${ssh_keyfile}'";
if [ ${TEST} -eq 0 ]; then
ssh-keygen \
-t ${ssh_keytype} \
-f "${ssh_keyfile}" \
-C "${hostname}: ${username}@${group}" \
-a 100 -N "${password}"
else
echo "$> 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})" ${SSH_AUTHORIZED_FILE});
if [ ! -z "${found}" ]; then
skip_ssh=1;
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;
password="[ALREADY SET]";
fi;
if [ ${skip_ssh} -eq 0 ]; then
# write login info to output file
if [ ${TEST} -eq 0 ]; then
create_output_file="${ROOT_FOLDER}${output_file}";
else
create_output_file="${ROOT_FOLDER}${output_file}.TEST";
fi;
echo $(date +"%F %T")";"${host}";"${_hostname}";"${username}";"${password}";"${ssh_allow_type} >> ${create_output_file};
# create folder only if we do not have central
# create the SSH foler and authorized access file with correct permissions
if [ ! -z "${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;
# add
echo " > Add public into authorized_keys file";
if [ ${TEST} -eq 0 ]; then
if [ ! -z "${SSH_CENTRAL_AUTHORIZED_FILE_FOLDER}" ]; then
chattr -i ${SSH_AUTHORIZED_FILE};
fi;
cat "${ssh_keyfile_pub}" > ${SSH_AUTHORIZED_FILE};
else
if [ ! -z "${SSH_CENTRAL_AUTHORIZED_FILE_FOLDER}" ]; then
echo "$> chattr -i ${SSH_AUTHORIZED_FILE}";
fi;
echo "$> cat ${ssh_keyfile_pub} > ${SSH_AUTHORIZED_FILE}";
fi;
# secure
if [ -z "${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 " > 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;
# End before anything because this is just info run
if [ ${INFO} -eq 1 ]; then
exit;
fi;
# zip everything and remove data in ssh key folder, delete output file with passwords
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}${SSH_KEYGEN_FOLDER_CREATED_PUB}";
# delete the rest
rm "${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}*";
fi;
# __END__

96
bin/lock_user.sh Executable file
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@@ -0,0 +1,96 @@
#!/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
while getopts ":t" opt; do
case "${opt}" in
t|test)
TEST=1;
;;
esac;
done;
shift "$((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
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 $username does not exists in /etc/passwd file";
continue;
fi;
# if not check if in reject list
if id -nGz "${username}" | grep -qzxF "${ssh_reject_group}"; then
echo "[.] User $username already in the ${ssh_reject_group} list";
continue;
fi;
# check if user is in sshallow/forward list
ssh_remove_group='';
if id -nGz "${username}" | grep -qzxF "${ssh_allow_group}"; then
ssh_remove_group="${ssh_allow_group}";
fi;
# if user is in ssh allow group and ALSO in ssh forward group -> bad
if id -nGz "${username}" | grep -qzxF "${ssh_forward_group}"; then
if [ ! -z "${ssh_remove_group}" ]; then
echo "[!!!! ERROR !!!!] User $username exists in both ${ssh_allow_group} and ${ssh_forward_group} group which should not be allowed. Remove user from one group and run script again.";
break;
fi;
ssh_remove_group="${ssh_forward_group}";
fi;
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}";
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;
# __END__

114
bin/unlock_user.sh Executable file
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@@ -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__

View File

@@ -1,221 +0,0 @@
#!/bin/bash
# * input file
# user_list.txt
# <ignored id>;<user name>;<group>[;override password][;override hostname]
# lines with # are skipped
# already created users are skipped
# * output file
# <date>;<target connect host name>;<hostname>;<username>;<password>
# If already existing PEM key is used then <password> is [ALREADY SET]
#
# * PEM KEY
# <hostname>%<group>%<user>%<ssh key type>.pem
# * PUBLIC KEY
# <hostname>%<group>%<user>%<ssh key type>.pem.pub
# stored as zip in
# zip/
#
# If a previously exsting PEM key should be used, put the public pem file
# into the ssh-keygen/ folder
# They pem pub key must follow the set rules above
# SET TO 1 to TEST [will no create user/group/folder]
TEST=0;
while getopts ":t" opt; do
case "${opt}" in
t|test)
TEST=1;
;;
esac;
done;
# hostname for output file only
host=$(hostname);
timesamp=$(date +%Y%m%d-%H%M%S)
# character to set getween info blocks
separator="#";
# base folder for all data
root_folder=$(pwd)'/';
input_file='user_list.txt';
output_file="user_password.${timesamp}.txt";
output_zip_folder='zip/';
output_zip="users.${timesamp}.zip"
ssh_keygen_folder='ssh-keygen/';
ssh_keygen_folder_created_pub='ssh-keygen-created-pub/';
ssh_keytype='ed25519';
# check if ssh key folder exists
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}";
fi;
# check if password generate software is installed
if [ ! command -v pwgen &> /dev/null ]; then
echo "Missing pwgen application, aborting";
exit;
fi;
# check for zip
if [ ! command -v zip &> /dev/null ]; then
echo "Missing zip application, aborting";
exit;
fi;
# check if user list file exists
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)
if [ $(stat -c %a .) != "600" ]; then
echo "!!!! RECOMMENDED TO HAVE BASE FOLDER SET TO '600' AND USER 'root' !!!!"
fi;
if [ $(whoami) != "root" ]; then
if [ ${TEST} -eq 0 ]; then
echo "Script must be run as root user";
exit;
else
echo "!!!! Script must be run as root user !!!!";
fi;
fi;
# create users
cat "${root_folder}${input_file}" |
while read i; do
# skip rows start with # (comment)
if [[ "${i}" =~ ^\# ]]; then
echo -e "";
else
# make lower case, remove spaces
user=$(echo "${i}" | cut -d ";" -f 2 | tr A-Z a-z | tr -d ' ');
_group=$(echo "${i}" | cut -d ";" -f 3 | tr A-Z a-z | tr -d ' ');
group=$(echo "${_group}" | cut -d "," -f 1);
sub_group="";
sub_group_opt="";
# check if "," inside and extract sub groups
if [ -z "${_group##*,*}" ]; then
sub_group=$(echo "${_group}" | cut -d "," -f 2-);
sub_group_opt=" -G ${sub_group}";
fi;
# override host name, lowercase and spaces removed
_hostname=$(echo "${i}" | cut -d ";" -f 5 | tr A-Z a-z | tr -d ' ');
if [ -z "${_hostname}" ]; then
hostname=${host};
else
hostname=${_hostname};
fi;
# do we have a password preset
_password=$(echo "${i}" | cut -d ";" -f 4);
# user & group not set
if [ -z "${user}" ] || [ -z "${_group}" ]; then
echo "[!!!!!] Missing user or group entry for ${user}/${_group}";
echo "[ABORT RUN]"
break;
fi;
# add group for each entry in _group
for create_group in ${_group//,/ }; do
if [ ${TEST} -eq 0 ]; then
groupadd -f ${create_group};
else
echo "$> groupadd -f ${create_group}";
fi;
done;
# SSH file name part without folder
ssh_keygen_id="${hostname}${separator}${group}${separator}${user}${separator}${ssh_keytype}.pem";
# the full file including folder name
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";
# check if user is not already created
if getent passwd ${user} > /dev/null 2>&1; then
echo "-- Skip '${user}:${group}(${sub_group})'";
else
echo "++ Create '${user}:${group}(${sub_group})'";
if [ ${TEST} -eq 0 ]; then
useradd -s /bin/bash -g ${group}${sub_group_opt} -m ${user};
else
echo "$> useradd -s /bin/bash -g ${group}${sub_group_opt} -m ${user}";
fi;
fi;
skip_ssh=0;
# if public pem already exists skip creation
if [ ! -f "${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" $(pwgen 10 1));
else
echo "! Override password set";
password=${_password};
fi;
# create SSH key
echo " > Create ssh key-pair '${ssh_keyfile}'";
ssh-keygen \
-t ${ssh_keytype} \
-f "${ssh_keyfile}" \
-C "${hostname}: ${user}@${group}" \
-a 100 -N "${password}"
else
found=$(grep "$(cat ${ssh_keyfile_check_pub})" /home/${user}/.ssh/authorized_keys);
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: ${ssh_keygen_id}.pub";
else
echo " < Use existing public ssh key '${ssh_keygen_id}.pub'";
# Password already set notification
fi;
password="[ALREADY SET]";
fi;
if [ ${skip_ssh} -eq 0 ]; then
# write login info to output file
echo $(date +"%F %T")";"${host}";"${_hostname}";"${user}";"${password} >> ${root_folder}${output_file};
# 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/";
fi;
echo " > Add public into authorized_keys";
if [ ${TEST} -eq 0 ]; then
cat "${ssh_keyfile_pub}" > /home/${user}/.ssh/authorized_keys;
else
echo "$> cat ${ssh_keyfile_pub} > /home/${user}/.ssh/authorized_keys";
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/${user}/.ssh/authorized_keys;
else
echo "$> chown -R ${user}:${group} /home/${user}/.ssh/";
echo "$> chmod 700 /home/${user}/.ssh/";
echo "$> chmod 600 /home/${user}/.ssh/authorized_keys";
fi;
fi;
fi;
done;
# zip everything and remove data in ssh key folder, delete output file with passwords
zip -r \
"${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}";
# 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}${ssh_keygen_folder_created_pub}";
# delete the rest
rm "${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}*";
fi;

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*
!.gitignore

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*
!.gitignore

95
user_create_flow.md Normal file
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# 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 ""
```

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#user_id;user_name;group,subgroup;optional override password;optional override hostname
#user_id;user_name;group,subgroup;ssh access type;override password;override hostname;override ssh type