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### GNU GENERAL PUBLIC LICENSE
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#### 10. Automatic Licensing of Downstream Recipients.
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this License.
Each contributor grants you a non-exclusive, worldwide, royalty-free
patent license under the contributor's essential patent claims, to
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In the following three paragraphs, a "patent license" is any express
agreement or commitment, however denominated, not to enforce a patent
(such as an express permission to practice a patent or covenant not to
sue for patent infringement). To "grant" such a patent license to a
party means to make such an agreement or commitment not to enforce a
patent against the party.
If you convey a covered work, knowingly relying on a patent license,
and the Corresponding Source of the work is not available for anyone
to copy, free of charge and under the terms of this License, through a
publicly available network server or other readily accessible means,
then you must either (1) cause the Corresponding Source to be so
available, or (2) arrange to deprive yourself of the benefit of the
patent license for this particular work, or (3) arrange, in a manner
consistent with the requirements of this License, to extend the patent
license to downstream recipients. "Knowingly relying" means you have
actual knowledge that, but for the patent license, your conveying the
covered work in a country, or your recipient's use of the covered work
in a country, would infringe one or more identifiable patents in that
country that you have reason to believe are valid.
If, pursuant to or in connection with a single transaction or
arrangement, you convey, or propagate by procuring conveyance of, a
covered work, and grant a patent license to some of the parties
receiving the covered work authorizing them to use, propagate, modify
or convey a specific copy of the covered work, then the patent license
you grant is automatically extended to all recipients of the covered
work and works based on it.
A patent license is "discriminatory" if it does not include within the
scope of its coverage, prohibits the exercise of, or is conditioned on
the non-exercise of one or more of the rights that are specifically
granted under this License. You may not convey a covered work if you
are a party to an arrangement with a third party that is in the
business of distributing software, under which you make payment to the
third party based on the extent of your activity of conveying the
work, and under which the third party grants, to any of the parties
who would receive the covered work from you, a discriminatory patent
license (a) in connection with copies of the covered work conveyed by
you (or copies made from those copies), or (b) primarily for and in
connection with specific products or compilations that contain the
covered work, unless you entered into that arrangement, or that patent
license was granted, prior to 28 March 2007.
Nothing in this License shall be construed as excluding or limiting
any implied license or other defenses to infringement that may
otherwise be available to you under applicable patent law.
#### 12. No Surrender of Others' Freedom.
If conditions are imposed on you (whether by court order, agreement or
otherwise) that contradict the conditions of this License, they do not
excuse you from the conditions of this License. If you cannot convey a
covered work so as to satisfy simultaneously your obligations under
this License and any other pertinent obligations, then as a
consequence you may not convey it at all. For example, if you agree to
terms that obligate you to collect a royalty for further conveying
from those to whom you convey the Program, the only way you could
satisfy both those terms and this License would be to refrain entirely
from conveying the Program.
#### 13. Use with the GNU Affero General Public License.
Notwithstanding any other provision of this License, you have
permission to link or combine any covered work with a work licensed
under version 3 of the GNU Affero General Public License into a single
combined work, and to convey the resulting work. The terms of this
License will continue to apply to the part which is the covered work,
but the special requirements of the GNU Affero General Public License,
section 13, concerning interaction through a network will apply to the
combination as such.
#### 14. Revised Versions of this License.
The Free Software Foundation may publish revised and/or new versions
of the GNU General Public License from time to time. Such new versions
will be similar in spirit to the present version, but may differ in
detail to address new problems or concerns.
Each version is given a distinguishing version number. If the Program
specifies that a certain numbered version of the GNU General Public
License "or any later version" applies to it, you have the option of
following the terms and conditions either of that numbered version or
of any later version published by the Free Software Foundation. If the
Program does not specify a version number of the GNU General Public
License, you may choose any version ever published by the Free
Software Foundation.
If the Program specifies that a proxy can decide which future versions
of the GNU General Public License can be used, that proxy's public
statement of acceptance of a version permanently authorizes you to
choose that version for the Program.
Later license versions may give you additional or different
permissions. However, no additional obligations are imposed on any
author or copyright holder as a result of your choosing to follow a
later version.
#### 15. Disclaimer of Warranty.
THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT
WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
A PARTICULAR PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND
PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE PROGRAM PROVE
DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING, REPAIR OR
CORRECTION.
#### 16. Limitation of Liability.
IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR
CONVEYS THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,
INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES
ARISING OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT
NOT LIMITED TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR
LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM
TO OPERATE WITH ANY OTHER PROGRAMS), EVEN IF SUCH HOLDER OR OTHER
PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
#### 17. Interpretation of Sections 15 and 16.
If the disclaimer of warranty and limitation of liability provided
above cannot be given local legal effect according to their terms,
reviewing courts shall apply local law that most closely approximates
an absolute waiver of all civil liability in connection with the
Program, unless a warranty or assumption of liability accompanies a
copy of the Program in return for a fee.
END OF TERMS AND CONDITIONS
### How to Apply These Terms to Your New Programs
If you develop a new program, and you want it to be of the greatest
possible use to the public, the best way to achieve this is to make it
free software which everyone can redistribute and change under these
terms.
To do so, attach the following notices to the program. It is safest to
attach them to the start of each source file to most effectively state
the exclusion of warranty; and each file should have at least the
"copyright" line and a pointer to where the full notice is found.
<one line to give the program's name and a brief idea of what it does.>
Copyright (C) <year> <name of author>
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>.
Also add information on how to contact you by electronic and paper
mail.
If the program does terminal interaction, make it output a short
notice like this when it starts in an interactive mode:
<program> Copyright (C) <year> <name of author>
This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
This is free software, and you are welcome to redistribute it
under certain conditions; type `show c' for details.
The hypothetical commands \`show w' and \`show c' should show the
appropriate parts of the General Public License. Of course, your
program's commands might be different; for a GUI interface, you would
use an "about box".
You should also get your employer (if you work as a programmer) or
school, if any, to sign a "copyright disclaimer" for the program, if
necessary. For more information on this, and how to apply and follow
the GNU GPL, see <https://www.gnu.org/licenses/>.
The GNU General Public License does not permit incorporating your
program into proprietary programs. If your program is a subroutine
library, you may consider it more useful to permit linking proprietary
applications with the library. If this is what you want to do, use the
GNU Lesser General Public License instead of this License. But first,
please read <https://www.gnu.org/licenses/why-not-lgpl.html>.

281
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# MaksIT.CertsUI – HAProxy and Agent Configuration
This guide explains how to configure HAProxy, Nginx, and install the MaksIT.CertsUI Agent for automated, secure certificate management.
---
If you find this project useful, please consider supporting its development:
[<img src="https://cdn.buymeacoffee.com/buttons/v2/default-blue.png" alt="Buy Me A Coffee" style="height: 60px; width: 217px;">](https://www.buymeacoffee.com/maksitcom)
---
## Overview
The **MaksIT.CertsUI Agent** is a lightweight, cross-platform service designed to:
- **Receive cached certificates** from the MaksIT.CertsUI server via secure HTTP APIs.
- **Deploy certificates** to your reverse proxy’s local file system (e.g., HAProxy, Nginx).
- **Reload or restart** the proxy service to activate new certificates automatically.
### Key Features
- **Language Agnostic:**
The agent communicates using standard HTTP APIs. While a C# WebAPI implementation is provided, you can build your own agent in any language or framework (C#, Go, Python, Rust, Node.js, etc.) as long as it can:
- Receive certificate files via HTTP
- Write files to the proxy’s certificate directory
- Reload or restart the proxy process
- **Security:**
All communication between the agent and the MaksIT.CertsUI server is protected by a shared API key. Only authorized agents can deploy certificates and trigger proxy reloads, safeguarding your infrastructure.
> **Warning:** Never commit secrets or API keys to version control. Always use strong, unique secrets and passwords.
- **Flexible Integration:**
The agent is fully independent from the MaksIT.CertsUI server, allowing you to integrate it into any environment or technology stack that supports HTTP endpoints.
---
## Table of Contents
- [HAProxy configuration](#haproxy-configuration)
- [Explanation](#explanation)
- [Nginx configuration](#nginx-configuration)
- [Nginx Explanation](#nginx-explanation)
- [MaksIT.CertsUI Agent installation](#maksitcertsui-agent-installation)
- [Contact](#contact)
---
## HAProxy configuration
Create the certificates directory:
```bash
sudo mkdir /etc/haproxy/certs
```
Edit your HAProxy configuration:
```bash
sudo nano /etc/haproxy/haproxy.cfg
```
Example configuration:
```cfg
# Global settings
#---------------------------------------------------------------------
global
log 127.0.0.1 local2
chroot /var/lib/haproxy
pidfile /var/run/haproxy.pid
maxconn 4000
user haproxy
group haproxy
daemon
stats socket /var/lib/haproxy/stats
ssl-default-bind-ciphers PROFILE=SYSTEM
ssl-default-server-ciphers PROFILE=SYSTEM
#---------------------------------------------------------------------
# common defaults that all the 'listen' and 'backend' sections will
# use if not designated in their block
#---------------------------------------------------------------------
defaults
mode http
log global
option httplog
option dontlognull
option http-server-close
option forwardfor except 127.0.0.0/8
option redispatch
retries 3
timeout http-request 10s
timeout queue 1m
timeout connect 10s
timeout client 1m
timeout server 1m
timeout http-keep-alive 10s
timeout check 10s
maxconn 3000
#---------------------------------------------------------------------
# Frontend for HTTP traffic on port 80
#---------------------------------------------------------------------
frontend http_frontend
bind *:80
acl acme_path path_beg /.well-known/acme-challenge/
# Redirect all HTTP traffic to HTTPS except ACME challenge requests
redirect scheme https if !acme_path
# Use the appropriate backend based on hostname if it's an ACME challenge request
use_backend acme_backend if acme_path
#---------------------------------------------------------------------
# Backend to handle ACME challenge requests
#---------------------------------------------------------------------
backend acme_backend
#server local_acme 172.16.0.5:8080
#---------------------------------------------------------------------
# Frontend for HTTPS traffic (port 443) with SNI and strict-sni
#---------------------------------------------------------------------
frontend https_frontend
bind *:443 ssl crt /etc/haproxy/certs strict-sni
http-request capture req.hdr(host) len 64
# Define ACLs for routing based on hostname
acl host_homepage hdr(host) -i maks-it.com
# Use appropriate backend based on SNI hostname
use_backend homepage_backend if host_homepage
default_backend homepage_backend
#---------------------------------------------------------------------
# Backend for maks-it.com
#---------------------------------------------------------------------
backend homepage_backend
http-request set-header X-Forwarded-Proto https
http-request set-header X-Forwarded-Host %[hdr(host)]
server homepage_server 172.16.0.10:8080
```
### Explanation
- **ACME Challenge Handling:**
- The `http_frontend` listens on port80 and checks if the request path starts with `/.well-known/acme-challenge/`. These requests are required by Let's Encrypt for domain validation and are forwarded to the `acme_backend`. All other HTTP requests are redirected to HTTPS.
- **HTTPS Frontend:**
- The `https_frontend` listens on port443, uses SNI (Server Name Indication) to serve the correct certificate, and routes requests to the appropriate backend based on the hostname.
- **Backends:**
- `acme_backend` should point to your ACME challenge responder (such as your LetsEncrypt client).
- `homepage_backend` is an example backend for your main site, forwarding requests to your application server.
- **Certificate Storage:**
- SSL certificates will be placed by agent in `/etc/haproxy/certs`. Each certificate file will contain the full certificate chain and private key.
---
## Nginx configuration
Create the certificates directory:
```bash
sudo mkdir -p /etc/nginx/certs
```
Edit your Nginx configuration:
```bash
sudo nano /etc/nginx/nginx.conf
```
Example configuration:
```nginx
server {
listen 80;
server_name maks-it.com;
location /.well-known/acme-challenge/ {
proxy_pass http://127.0.0.1:5000; # Point to your ACME challenge responder (agent)
proxy_set_header Host $host;
proxy_set_header X-Real-IP $remote_addr;
}
location / {
return 301 https://$host$request_uri;
}
}
server {
listen 443 ssl;
server_name maks-it.com;
ssl_certificate /etc/nginx/certs/maks-it.com;
ssl_protocols TLSv1.2 TLSv1.3;
ssl_ciphers HIGH:!aNULL:!MD5;
location / {
proxy_pass http://127.0.0.1:8080; # Your backend application
proxy_set_header Host $host;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-Proto $scheme;
}
}
```
### Nginx Explanation
- **ACME Challenge Handling:**
- The first server block listens on port80 and forwards requests to `/.well-known/acme-challenge/` to the agent (or ACME challenge responder). All other HTTP requests are redirected to HTTPS.
- **HTTPS Frontend:**
- The second server block listens on port443, uses the certificate and key files placed by the agent in `/etc/nginx/certs`, and proxies requests to your backend application.
- **Certificate Storage:**
- SSL certificates and keys should be placed by the agent in `/etc/nginx/certs`. Each domain should have its own `.crt` and `.key` files.
---
## MaksIT.CertsUI Agent installation
The Agent should be installed on the same machine as your reverse proxy.
Clone the repository in your home dir and navigate to the Agent directory (git should be installed):
```bash
cd ~
git clone https://github.com/MAKS-IT-COM/maksit-certs-ui-agent.git
cd maksit-certs-ui-agent/src/MaksIT.CertsUI.Agent
```
Edit `appsettings.json` configuration:
```json
{
"Logging": {
"LogLevel": {
"Default": "Information",
"Microsoft.AspNetCore": "Warning"
}
},
"AllowedHosts": "*",
"Configuration": {
"ApiKey": "<your-agent-key>",
"CertsPath": "<your-certs-dir-path>"
}
}
```
**Note:**
- Replace `<your-agent-key>` with your shared API key.
- Replace `<your-certs-dir-path>` with the path to your certificates directory (e.g., `/etc/haproxy/certs` or `/etc/nginx/certs`).
```bash
cd ../Installers
```
To deploy the agent via script:
```bash
sudo sh ./install.sh
```
This script will create the `maksit-certs-ui-agent` service and open port `5000` for communication.
## MaksIT.CertsUI Agent uninstallation
To uninstall the agent, run the following command:
```bash
sudo sh ./uninstall.sh
```
---
## Contact
For any inquiries or contributions, feel free to reach out:
- **Email**: maksym.sadovnychyy@gmail.com
- **Author**: Maksym Sadovnychyy (MAKS-IT)

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#!/bin/bash
# Variables
REQUIRED_DOTNET_SDK="10.0"
SERVICE_NAME="maksit-certs-ui-agent"
SERVICE_PORT="5000"
SERVICE_FILE="/etc/systemd/system/$SERVICE_NAME.service"
INSTALL_DIR="/opt/$SERVICE_NAME"
DOTNET_EXEC="/usr/bin/dotnet"
EXEC_CMD="$DOTNET_EXEC $INSTALL_DIR/MaksIT.CertsUI.Agent.dll --urls \"http://*:$SERVICE_PORT\""
APPSETTINGS_FILE="appsettings.json"
NO_NEW_KEY_FLAG="--no-new-key"
TMP_JSON_FILE="/tmp/tmp.$$.json"
# Detect distro and version
if [ -f /etc/os-release ]; then
. /etc/os-release
DISTRO=$ID
VERSION_ID=$VERSION_ID
else
echo "Cannot detect Linux distribution."
exit 1
fi
# Helper: Check available SDKs and install
check_and_install_dotnet_sdk() {
local sdk_pkg
case "$DISTRO" in
ubuntu|debian)
if ! dpkg -l | grep -q packages-microsoft-prod; then
wget -q https://packages.microsoft.com/config/$DISTRO/$VERSION_ID/packages-microsoft-prod.deb -O packages-microsoft-prod.deb
sudo dpkg -i packages-microsoft-prod.deb
sudo apt-get update
fi
sdk_pkg="dotnet-sdk-$REQUIRED_DOTNET_SDK"
if ! dpkg -l | grep -q "$sdk_pkg"; then
if ! apt-cache show "$sdk_pkg" > /dev/null 2>&1; then
echo "Required .NET SDK not available."
exit 1
fi
sudo apt-get install -y "$sdk_pkg"
fi
;;
centos|rhel|fedora|almalinux|alma|rocky)
if [[ "$DISTRO" == "almalinux" ]]; then
MS_DISTRO="alma"
elif [[ "$DISTRO" == "rocky" ]]; then
MS_DISTRO="rocky"
else
MS_DISTRO="$DISTRO"
fi
LOCAL_MAJOR="${VERSION_ID%%.*}"
REPO_INDEX_URL="https://packages.microsoft.com/config/$MS_DISTRO/"
AVAILABLE_VERSIONS=$(curl -s "$REPO_INDEX_URL" | grep -oP '(?<=href=")[0-9][^/]*(?=/")' | sort -V)
if [ -z "$AVAILABLE_VERSIONS" ]; then
echo "ERROR: Cannot fetch repo index."
exit 1
fi
SELECTED_VERSION=""
for v in $AVAILABLE_VERSIONS; do
if [[ "$v" == "$LOCAL_MAJOR" ]]; then
SELECTED_VERSION="$v"
break
fi
if [[ "$v" -lt "$LOCAL_MAJOR" ]]; then
SELECTED_VERSION="$v"
fi
done
if [ -z "$SELECTED_VERSION" ]; then
echo "No matching repo version found"
exit 1
fi
REPO_RPM_URL="$REPO_INDEX_URL$SELECTED_VERSION/packages-microsoft-prod.rpm"
# Idempotent repo install
if ! rpm -q packages-microsoft-prod > /dev/null 2>&1; then
sudo rpm -Uvh --quiet "$REPO_RPM_URL" || {
echo "ERROR: Failed installing Microsoft repo"
exit 1
}
else
echo "Microsoft repo already installed, skipping"
fi
sudo dnf makecache
sdk_pkg="dotnet-sdk-$REQUIRED_DOTNET_SDK"
# Idempotent SDK install
if ! rpm -q "$sdk_pkg" > /dev/null 2>&1; then
if dnf list available "$sdk_pkg" > /dev/null 2>&1; then
sudo dnf install -y "$sdk_pkg"
else
echo "ERROR: .NET SDK $sdk_pkg not found and not installed"
exit 1
fi
else
echo ".NET SDK already installed."
fi
;;
*)
echo "Unsupported distro: $DISTRO"
exit 1
;;
esac
}
check_and_install_dotnet_sdk
# Stop service if exists (idempotent)
if systemctl list-unit-files | grep -q "$SERVICE_NAME.service"; then
sudo systemctl stop "$SERVICE_NAME.service" || true
sudo systemctl disable "$SERVICE_NAME.service" || true
fi
# Remove old systemd file (idempotent)
sudo rm -f "$SERVICE_FILE"
# Recreate install dir
sudo rm -rf "$INSTALL_DIR"
sudo mkdir -p "$INSTALL_DIR"
# Update API key
if [[ "$1" != "$NO_NEW_KEY_FLAG" ]]; then
if [ -f "$APPSETTINGS_FILE" ]; then
NEW_API_KEY=$(openssl rand -base64 32)
jq --arg newApiKey "$NEW_API_KEY" '.Configuration.ApiKey = $newApiKey' "$APPSETTINGS_FILE" > "$TMP_JSON_FILE" && mv "$TMP_JSON_FILE" "$APPSETTINGS_FILE"
fi
fi
SCRIPT_DIR=$(dirname "$(realpath "$0")")
cd "$SCRIPT_DIR/.." || exit 1
if [ ! -f "MaksIT.CertsUI.Agent/MaksIT.CertsUI.Agent.csproj" ]; then
echo "Project missing"
exit 1
fi
sudo dotnet build MaksIT.CertsUI.Agent/MaksIT.CertsUI.Agent.csproj --configuration Release
sudo dotnet publish MaksIT.CertsUI.Agent/MaksIT.CertsUI.Agent.csproj -c Release -o "$INSTALL_DIR"
# Systemd unit (idempotent)
sudo bash -c "cat > $SERVICE_FILE <<EOL
[Unit]
Description=Maks-IT Agent
After=network.target
[Service]
WorkingDirectory=$INSTALL_DIR
ExecStart=$EXEC_CMD
Restart=always
RestartSec=10
KillSignal=SIGINT
SyslogIdentifier=dotnet-servicereloader
User=root
Environment=ASPNETCORE_ENVIRONMENT=Production
[Install]
WantedBy=multi-user.target
EOL"
sudo systemctl daemon-reload
sudo systemctl enable "$SERVICE_NAME.service"
sudo systemctl restart "$SERVICE_NAME.service"
# Firewall (idempotent)
if command -v firewall-cmd > /dev/null 2>&1; then
FIREWALL_SERVICE_XML="/etc/firewalld/services/$SERVICE_NAME.xml"
if [ ! -f "$FIREWALL_SERVICE_XML" ]; then
echo '<?xml version="1.0"?>
<service>
<short>MaksIT.CertsUI Agent</short>
<port protocol="tcp" port="5000"/>
</service>' | sudo tee "$FIREWALL_SERVICE_XML"
fi
sleep 10
sudo firewall-cmd --permanent --add-service=$SERVICE_NAME || true
sudo firewall-cmd --reload
elif command -v ufw > /dev/null 2>&1; then
sudo ufw allow "$SERVICE_PORT"/tcp || true
fi

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#!/bin/bash
# Variables
SERVICE_NAME="maksit-certs-ui-agent"
SERVICE_FILE="/etc/systemd/system/$SERVICE_NAME.service"
INSTALL_DIR="/opt/$SERVICE_NAME"
SERVICE_PORT="5000"
FIREWALL_XML="/etc/firewalld/services/maks-it-agent.xml"
echo "Uninstalling $SERVICE_NAME ..."
# Stop and disable the service if it exists
if systemctl list-unit-files | grep -q "$SERVICE_NAME.service"; then
echo "Stopping service..."
sudo systemctl stop "$SERVICE_NAME.service" || true
sudo systemctl disable "$SERVICE_NAME.service" || true
fi
# Remove the systemd service file
if [ -f "$SERVICE_FILE" ]; then
echo "Removing systemd service file..."
sudo rm -f "$SERVICE_FILE"
fi
# Reload systemd
echo "Reloading systemd..."
sudo systemctl daemon-reload
# Remove installation directory
if [ -d "$INSTALL_DIR" ]; then
echo "Removing installation directory $INSTALL_DIR ..."
sudo rm -rf "$INSTALL_DIR"
fi
# Remove firewalld rule and XML
if command -v firewall-cmd > /dev/null 2>&1; then
echo "Removing firewalld service rule..."
sudo firewall-cmd --permanent --remove-service=$SERVICE_NAME || true
if [ -f "$FIREWALL_XML" ]; then
echo "Removing firewalld XML file..."
sudo rm -f "$FIREWALL_XML"
fi
sudo firewall-cmd --reload || true
fi
# Remove UFW rule if available
if command -v ufw > /dev/null 2>&1; then
echo "Removing UFW rule..."
sudo ufw delete allow "$SERVICE_PORT"/tcp || true
fi
echo "Uninstall complete."

43
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@ -0,0 +1,43 @@

Microsoft Visual Studio Solution File, Format Version 12.00
# Visual Studio Version 17
VisualStudioVersion = 17.0.31903.59
MinimumVisualStudioVersion = 10.0.40219.1
Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "MaksIT.CertsUI.Agent", "MaksIT.CertsUI.Agent\MaksIT.CertsUI.Agent.csproj", "{F7D5BDB4-25C7-688F-79F6-226D35BD9546}"
EndProject
Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Installers", "Installers", "{8EC462FD-D22E-90A8-E5CE-7E832BA40C5D}"
ProjectSection(SolutionItems) = preProject
Installers\install.sh = Installers\install.sh
Installers\uninstall.sh = Installers\uninstall.sh
EndProjectSection
EndProject
Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "MaksIT.CertsUI.Models", "MaksIT.Models\MaksIT.CertsUI.Models.csproj", "{693902E3-A782-4842-A0A6-B451964DC7E3}"
EndProject
Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Documentation", "Documentation", "{02EA681E-C7D8-13C7-8484-4AC65E1B71E8}"
ProjectSection(SolutionItems) = preProject
..\LICENSE.md = ..\LICENSE.md
..\README.md = ..\README.md
EndProjectSection
EndProject
Global
GlobalSection(SolutionConfigurationPlatforms) = preSolution
Debug|Any CPU = Debug|Any CPU
Release|Any CPU = Release|Any CPU
EndGlobalSection
GlobalSection(ProjectConfigurationPlatforms) = postSolution
{F7D5BDB4-25C7-688F-79F6-226D35BD9546}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
{F7D5BDB4-25C7-688F-79F6-226D35BD9546}.Debug|Any CPU.Build.0 = Debug|Any CPU
{F7D5BDB4-25C7-688F-79F6-226D35BD9546}.Release|Any CPU.ActiveCfg = Release|Any CPU
{F7D5BDB4-25C7-688F-79F6-226D35BD9546}.Release|Any CPU.Build.0 = Release|Any CPU
{693902E3-A782-4842-A0A6-B451964DC7E3}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
{693902E3-A782-4842-A0A6-B451964DC7E3}.Debug|Any CPU.Build.0 = Debug|Any CPU
{693902E3-A782-4842-A0A6-B451964DC7E3}.Release|Any CPU.ActiveCfg = Release|Any CPU
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GlobalSection(SolutionProperties) = preSolution
HideSolutionNode = FALSE
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GlobalSection(ExtensibilityGlobals) = postSolution
SolutionGuid = {B55147D5-7865-42A3-8979-3423AD562252}
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37
src/MaksIT.CertsUI.Agent/Agent.generated.sln Normal file
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@ -0,0 +1,37 @@

Microsoft Visual Studio Solution File, Format Version 12.00
# Visual Studio Version 17
VisualStudioVersion = 17.5.002.0
MinimumVisualStudioVersion = 10.0.40219.1
Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Agent - Backup (1)", "Agent - Backup (1).csproj", "{392E9E34-E17C-4118-9C83-52AF52A56E54}"
EndProject
Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Agent - Backup", "Agent - Backup.csproj", "{18049E33-180E-41F1-8343-5BCD4755B2A8}"
EndProject
Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Agent", "Agent.csproj", "{2C1A9C83-0B26-450C-A874-0B8DBD251B0F}"
EndProject
Global
GlobalSection(SolutionConfigurationPlatforms) = preSolution
Debug|Any CPU = Debug|Any CPU
Release|Any CPU = Release|Any CPU
EndGlobalSection
GlobalSection(ProjectConfigurationPlatforms) = postSolution
{392E9E34-E17C-4118-9C83-52AF52A56E54}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
{392E9E34-E17C-4118-9C83-52AF52A56E54}.Debug|Any CPU.Build.0 = Debug|Any CPU
{392E9E34-E17C-4118-9C83-52AF52A56E54}.Release|Any CPU.ActiveCfg = Release|Any CPU
{392E9E34-E17C-4118-9C83-52AF52A56E54}.Release|Any CPU.Build.0 = Release|Any CPU
{18049E33-180E-41F1-8343-5BCD4755B2A8}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
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29
src/MaksIT.CertsUI.Agent/AuthorizationFilters/ApiKeyAuthorizationFilter.cs Normal file
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using Microsoft.AspNetCore.Mvc.Filters;
using Microsoft.AspNetCore.Mvc;
using Microsoft.Extensions.Options;
namespace MaksIT.CertsUI.Agent.AuthorizationFilters;
public class ApiKeyAuthorizationFilter : IAuthorizationFilter {
private readonly Configuration _appSettings;
public ApiKeyAuthorizationFilter(
IOptions<Configuration> appSettings
) {
_appSettings = appSettings.Value;
}
public void OnAuthorization(AuthorizationFilterContext context) {
if (!context.HttpContext.Request.Headers.TryGetValue("X-API-KEY", out var extractedApiKey)) {
context.Result = new UnauthorizedResult();
return;
}
if (!_appSettings.ApiKey.Equals(extractedApiKey)) {
context.Result = new UnauthorizedResult();
return;
}
}
}

29
src/MaksIT.CertsUI.Agent/Configuration.cs Normal file
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namespace MaksIT.CertsUI.Agent;
public class Configuration {
private string? _apiKey;
public string ApiKey {
get {
var env = Environment.GetEnvironmentVariable("MAKS-IT_AGENT_API_KEY");
return env ?? _apiKey ?? string.Empty;
}
set {
_apiKey = value;
}
}
private string? _certsPath;
public string CertsPath {
get {
var env = Environment.GetEnvironmentVariable("MAKS-IT_AGENT_CERTS_PATH");
return env ?? _certsPath ?? string.Empty;
}
set {
_certsPath = value;
}
}
}

35
src/MaksIT.CertsUI.Agent/Controllers/CertsController.cs Normal file
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using Microsoft.AspNetCore.Mvc;
using Microsoft.Extensions.Options;
using MaksIT.CertsUI.Models.Requests;
using MaksIT.CertsUI.Agent.AuthorizationFilters;
namespace MaksIT.CertsUI.Agent.Controllers;
[ApiController]
[Route("[controller]")]
[ServiceFilter(typeof(ApiKeyAuthorizationFilter))]
public class CertsController : ControllerBase {
private readonly Configuration _appSettings;
private readonly ILogger<CertsController> _logger;
public CertsController(
IOptions<Configuration> appSettings,
ILogger<CertsController> logger
) {
_logger = logger;
_appSettings = appSettings.Value;
}
[HttpPost("[action]")]
public IActionResult Upload([FromBody] CertsUploadRequest requestData) {
_logger.LogInformation("Uploading certificates");
foreach (var (fileName, fileContent) in requestData.Certs) {
System.IO.File.WriteAllText(Path.Combine(_appSettings.CertsPath, fileName), fileContent);
}
return Ok("Certificates uploaded successfully");
}
}

16
src/MaksIT.CertsUI.Agent/Controllers/HelloWorldController.cs Normal file
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using Microsoft.AspNetCore.Mvc;
using MaksIT.CertsUI.Agent.AuthorizationFilters;
namespace MaksIT.CertsUI.Agent.Controllers;
[ApiController]
[Route("[controller]")]
[ServiceFilter(typeof(ApiKeyAuthorizationFilter))]
public class HelloWorldController : ControllerBase {
[HttpGet]
public IActionResult Get() {
return Ok("Hello, World!");
}
}

56
src/MaksIT.CertsUI.Agent/Controllers/ServiceController.cs Normal file
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using System.Diagnostics;
using Microsoft.AspNetCore.Mvc;
using Microsoft.Extensions.Options;
using MaksIT.CertsUI.Agent.AuthorizationFilters;
using MaksIT.CertsUI.Models.Requests;
namespace MaksIT.CertsUI.Agent.Controllers;
[ApiController]
[Route("[controller]")]
[ServiceFilter(typeof(ApiKeyAuthorizationFilter))]
public class ServiceController : ControllerBase {
private readonly Configuration _appSettings;
public ServiceController(
IOptions<Configuration> appSettings
) {
_appSettings = appSettings.Value;
}
[HttpPost("[action]")]
public IActionResult Reload([FromBody] ServiceReloadRequest requestData) {
var serviceName = requestData.ServiceName;
try {
var processStartInfo = new ProcessStartInfo {
FileName = "/bin/systemctl",
Arguments = $"reload {serviceName}",
RedirectStandardOutput = true,
RedirectStandardError = true,
UseShellExecute = false,
CreateNoWindow = true
};
using (var process = new Process { StartInfo = processStartInfo }) {
process.Start();
process.WaitForExit();
var output = process.StandardOutput.ReadToEnd();
var error = process.StandardError.ReadToEnd();
if (process.ExitCode != 0) {
return StatusCode(500, $"Error reloading service: {error}");
}
return Ok($"Service {serviceName} reloaded successfully: {output}");
}
}
catch (Exception ex) {
return StatusCode(500, $"Exception: {ex.Message}");
}
}
}

27
src/MaksIT.CertsUI.Agent/MaksIT.CertsUI.Agent.csproj Normal file
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<Project Sdk="Microsoft.NET.Sdk.Web">
<PropertyGroup>
<TargetFramework>net10.0</TargetFramework>
<Nullable>enable</Nullable>
<ImplicitUsings>enable</ImplicitUsings>
<RootNamespace>$(MSBuildProjectName.Replace(" ", "_"))</RootNamespace>
<DockerDefaultTargetOS>Linux</DockerDefaultTargetOS>
<PackageReadmeFile>README.md</PackageReadmeFile>
<PackageLicenseFile>LICENSE.md</PackageLicenseFile>
</PropertyGroup>
<ItemGroup>
<PackageReference Include="Microsoft.VisualStudio.Azure.Containers.Tools.Targets" Version="1.22.1" />
<PackageReference Include="Swashbuckle.AspNetCore" Version="10.0.1" />
</ItemGroup>
<ItemGroup>
<ProjectReference Include="..\MaksIT.Models\MaksIT.CertsUI.Models.csproj" />
</ItemGroup>
<ItemGroup>
<None Update="build_and_deploy.sh">
<CopyToOutputDirectory>Never</CopyToOutputDirectory>
</None>
</ItemGroup>
</Project>

37
src/MaksIT.CertsUI.Agent/Program.cs Normal file
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using MaksIT.CertsUI.Agent;
using MaksIT.CertsUI.Agent.AuthorizationFilters;
var builder = WebApplication.CreateBuilder(args);
// Extract configuration
var configuration = builder.Configuration;
// Configure strongly typed settings objects
var configurationSection = configuration.GetSection("Configuration");
var appSettings = configurationSection.Get<Configuration>() ?? throw new ArgumentNullException();
// Allow configurations to be available through IOptions<Configuration>
builder.Services.Configure<Configuration>(configurationSection);
// Add services to the container.
builder.Services.AddControllers();
// Learn more about configuring Swagger/OpenAPI at https://aka.ms/aspnetcore/swashbuckle
builder.Services.AddEndpointsApiExplorer();
builder.Services.AddSwaggerGen();
builder.Services.AddScoped<ApiKeyAuthorizationFilter>();
var app = builder.Build();
// Configure the HTTP request pipeline.
if (app.Environment.IsDevelopment()) {
app.UseSwagger();
app.UseSwaggerUI();
}
app.UseAuthorization();
app.MapControllers();
app.Run();

40
src/MaksIT.CertsUI.Agent/Properties/launchSettings.json Normal file
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{
"profiles": {
"http": {
"commandName": "Project",
"launchBrowser": true,
"launchUrl": "swagger",
"environmentVariables": {
"ASPNETCORE_ENVIRONMENT": "Development"
},
"dotnetRunMessages": true,
"applicationUrl": "http://localhost:5000"
},
"IIS Express": {
"commandName": "IISExpress",
"launchBrowser": true,
"launchUrl": "swagger",
"environmentVariables": {
"ASPNETCORE_ENVIRONMENT": "Development"
}
},
"Container (Dockerfile)": {
"commandName": "Docker",
"launchBrowser": true,
"launchUrl": "{Scheme}://{ServiceHost}:{ServicePort}/swagger",
"environmentVariables": {
"ASPNETCORE_HTTP_PORTS": "5000"
},
"publishAllPorts": true
}
},
"$schema": "http://json.schemastore.org/launchsettings.json",
"iisSettings": {
"windowsAuthentication": false,
"anonymousAuthentication": true,
"iisExpress": {
"applicationUrl": "http://localhost:7748",
"sslPort": 0
}
}
}

8
src/MaksIT.CertsUI.Agent/appsettings.Development.json Normal file
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@ -0,0 +1,8 @@
{
"Logging": {
"LogLevel": {
"Default": "Information",
"Microsoft.AspNetCore": "Warning"
}
}
}

14
src/MaksIT.CertsUI.Agent/appsettings.json Normal file
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@ -0,0 +1,14 @@
{
"Logging": {
"LogLevel": {
"Default": "Information",
"Microsoft.AspNetCore": "Warning"
}
},
"AllowedHosts": "*",
"Configuration": {
"ApiKey": "UGnCaElLLJClHgUeet/yr7vNvPf13b1WkDJQMfsiP6I=",
"CertsPath": "/etc/haproxy/certs"
}
}

13
src/MaksIT.Models/MaksIT.CertsUI.Models.csproj Normal file
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@ -0,0 +1,13 @@
<Project Sdk="Microsoft.NET.Sdk">
<PropertyGroup>
<TargetFramework>net10.0</TargetFramework>
<ImplicitUsings>enable</ImplicitUsings>
<Nullable>enable</Nullable>
</PropertyGroup>
<ItemGroup>
<PackageReference Include="MaksIT.Core" Version="1.5.9" />
</ItemGroup>
</Project>

8
src/MaksIT.Models/Requests/CertsUploadRequest.cs Normal file
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@ -0,0 +1,8 @@
using MaksIT.Core.Abstractions.Webapi;
namespace MaksIT.CertsUI.Models.Requests;
public class CertsUploadRequest : RequestModelBase {
public Dictionary<string, string> Certs { get; set; }
}

9
src/MaksIT.Models/Requests/ServiceReloadRequest.cs Normal file
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@ -0,0 +1,9 @@
using MaksIT.Core.Abstractions.Webapi;
namespace MaksIT.CertsUI.Models.Requests;
public class ServiceReloadRequest : RequestModelBase {
public string ServiceName { get; set; }
}

8
src/MaksIT.Models/Responses/HelloWorldResponse.cs Normal file
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@ -0,0 +1,8 @@
using MaksIT.Core.Abstractions.Webapi;
namespace MaksIT.CertsUI.Models.Responses;
public class HelloWorldResponse : ResponseModelBase {
public string Message { get; set; }
}