diff --git a/.github/workflows/codesniffer.yml b/.github/workflows/codesniffer.yml
new file mode 100644
index 0000000..6a730e3
--- /dev/null
+++ b/.github/workflows/codesniffer.yml
@@ -0,0 +1,39 @@
+name: "Codesniffer"
+
+on:
+  pull_request:
+
+  push:
+    branches: [ "*" ]
+
+  schedule:
+    - cron: "0 8 * * 1"
+
+jobs:
+  phpstan:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v3
+
+      - name: "Setup PHP"
+        uses: shivammathur/setup-php@v2
+        with:
+          php-version: '8.2'
+
+      - name: Validate composer.json and composer.lock
+        run: composer validate
+
+      - name: Cache Composer packages
+        id: composer-cache
+        uses: actions/cache@v3
+        with:
+          path: vendor
+          key: ${{ runner.os }}-php-${{ hashFiles('**/composer.lock') }}
+          restore-keys: |
+            ${{ runner.os }}-php-
+
+      - name: Install dependencies
+        run: composer install --prefer-dist --no-progress
+      - name: Run coding standards
+        run: make cs
\ No newline at end of file
diff --git a/.github/workflows/phpstan.yml b/.github/workflows/phpstan.yml
new file mode 100644
index 0000000..fba1147
--- /dev/null
+++ b/.github/workflows/phpstan.yml
@@ -0,0 +1,39 @@
+name: PHPstan
+
+on:
+  pull_request:
+
+  push:
+    branches: [ "*" ]
+
+  schedule:
+    - cron: "0 8 * * 1"
+
+jobs:
+  phpstan:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v3
+
+      - name: "Setup PHP"
+        uses: shivammathur/setup-php@v2
+        with:
+          php-version: '8.2'
+
+      - name: Validate composer.json and composer.lock
+        run: composer validate
+
+      - name: Cache Composer packages
+        id: composer-cache
+        uses: actions/cache@v3
+        with:
+          path: vendor
+          key: ${{ runner.os }}-php-${{ hashFiles('**/composer.lock') }}
+          restore-keys: |
+            ${{ runner.os }}-php-
+
+      - name: Install dependencies
+        run: composer install --prefer-dist --no-progress
+      - name: Run phpstan
+        run: make phpstan
\ No newline at end of file
diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
new file mode 100644
index 0000000..f3f637d
--- /dev/null
+++ b/.github/workflows/tests.yml
@@ -0,0 +1,39 @@
+name: PHP Unit tests
+
+on:
+  pull_request:
+
+  push:
+    branches: [ "*" ]
+
+  schedule:
+    - cron: "0 8 * * 1"
+
+jobs:
+  test82:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v3
+
+      - name: "Setup PHP"
+        uses: shivammathur/setup-php@v2
+        with:
+          php-version: '8.2'
+
+      - name: Validate composer.json and composer.lock
+        run: composer validate
+
+      - name: Cache Composer packages
+        id: composer-cache
+        uses: actions/cache@v3
+        with:
+          path: vendor
+          key: ${{ runner.os }}-php-${{ hashFiles('**/composer.lock') }}
+          restore-keys: |
+            ${{ runner.os }}-php-
+
+      - name: Install dependencies
+        run: composer install --prefer-dist --no-progress
+      - name: Run tests
+        run: make tests
\ No newline at end of file
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..e3abb61
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,9 @@
+# IDE
+/.idea
+
+# Composer
+/vendor
+composer.lock
+
+# Tests
+/coverage.xml
diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..189b76b
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,22 @@
+.PHONY: install tests qa cs csf phpstan
+
+install:
+	composer install
+
+qa: phpstan cs
+
+cs:
+ifdef GITHUB_ACTION
+	vendor/bin/phpcs --standard=ruleset.xml --encoding=utf-8 --colors -nsp -q --report=checkstyle src tests
+else
+	vendor/bin/phpcs --standard=ruleset.xml --encoding=utf-8 --colors -nsp src tests
+endif
+
+csf:
+	vendor/bin/phpcbf --standard=ruleset.xml --encoding=utf-8 --colors -nsp src tests
+
+phpstan:
+	vendor/bin/phpstan analyse -c phpstan.neon
+
+tests:
+	vendor/bin/phpunit --bootstrap vendor/autoload.php tests
\ No newline at end of file
diff --git a/composer.json b/composer.json
new file mode 100644
index 0000000..c10374a
--- /dev/null
+++ b/composer.json
@@ -0,0 +1,39 @@
+{
+    "name": "troia-studio/ssh-key-validator-nette",
+    "description": "Implementation troia-studio/ssh-key-validator to Nette",
+    "type": "library",
+    "autoload": {
+        "psr-4": {
+            "TroiaStudio\\SshKeyValidator\\": "src/"
+        }
+    },
+    "autoload-dev": {
+        "psr-4": {
+            "Tests\\": "tests"
+        }
+    },
+    "require": {
+        "php": ">=8.2",
+        "troia-studio/ssh-key-validator": "^1.0",
+        "symfony/validator": "^6.3"
+    },
+    "require-dev": {
+        "ext-intl": "*",
+        "contributte/qa": "^0.3.1",
+        "contributte/phpstan": "^0.1.0",
+        "phpunit/phpunit": "^10"
+    },
+    "license": "MIT",
+    "authors": [
+        {
+            "name": "Jan Galek",
+            "email": "me@jan-galek.cz"
+        }
+    ],
+    "minimum-stability": "stable",
+    "config": {
+        "allow-plugins": {
+            "dealerdirect/phpcodesniffer-composer-installer": true
+        }
+    }
+}
diff --git a/phpstan.neon b/phpstan.neon
new file mode 100644
index 0000000..42589b0
--- /dev/null
+++ b/phpstan.neon
@@ -0,0 +1,15 @@
+includes:
+    - vendor/contributte/phpstan/phpstan.neon
+
+parameters:
+    level: 0
+    phpVersion: 80200
+
+    scanDirectories:
+        - src
+
+    fileExtensions:
+        - php
+
+    paths:
+        - src
\ No newline at end of file
diff --git a/ruleset.xml b/ruleset.xml
new file mode 100644
index 0000000..8b1bcde
--- /dev/null
+++ b/ruleset.xml
@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<ruleset name="TroiaStudio" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="vendor/squizlabs/php_codesniffer/phpcs.xsd">
+    <!-- Rulesets -->
+    <rule ref="./vendor/troia-studio/ssh-key-validator/ruleset.xml" />
+
+    <config name="php_version" value="80200"/>
+
+    <!-- Excludes -->
+    <exclude-pattern>/tests/tmp</exclude-pattern>
+</ruleset>
\ No newline at end of file
diff --git a/src/IsSshKey.php b/src/IsSshKey.php
new file mode 100644
index 0000000..757c381
--- /dev/null
+++ b/src/IsSshKey.php
@@ -0,0 +1,33 @@
+<?php
+
+declare(strict_types = 1);
+
+namespace TroiaStudio\SshKeyValidator;
+
+use Attribute;
+use Symfony\Component\Validator\Constraint;
+
+/**
+ * @Annotation
+ * @Target({"PROPERTY", "METHOD"})
+ */
+#[Attribute(Attribute::TARGET_PROPERTY | Attribute::TARGET_METHOD)]
+class IsSshKey extends Constraint
+{
+
+    public const NOT_SSH_KEY_ERROR = '99a2ab41-3180-4c25-821b-ef403acd1c2d';
+
+    protected const ERROR_NAMES = [
+        self::NOT_SSH_KEY_ERROR => 'NOT_SSH_KEY_ERROR',
+    ];
+
+    public string $message = 'This value should be valid ssh key.';
+
+    public function __construct(mixed $options = null, ?string $message = null, ?array $groups = null, mixed $payload = null)
+    {
+        parent::__construct($options ?? [], $groups, $payload);
+
+        $this->message = $message ?? $this->message;
+    }
+
+}
diff --git a/src/IsSshKeyValidator.php b/src/IsSshKeyValidator.php
new file mode 100644
index 0000000..3eb6c14
--- /dev/null
+++ b/src/IsSshKeyValidator.php
@@ -0,0 +1,41 @@
+<?php
+
+declare(strict_types = 1);
+
+namespace TroiaStudio\SshKeyValidator;
+
+use Symfony\Component\Validator\Constraint;
+use Symfony\Component\Validator\ConstraintValidator;
+use Symfony\Component\Validator\Exception\UnexpectedTypeException;
+use Symfony\Component\Validator\Exception\UnexpectedValueException;
+
+class IsSshKeyValidator extends ConstraintValidator
+{
+
+    public function validate(mixed $value, Constraint $constraint): void
+    {
+        if (!$constraint instanceof IsSshKey) {
+            throw new UnexpectedTypeException($constraint, IsSshKey::class);
+        }
+
+        if ($value === null || $value === '') {
+            return;
+        }
+
+        if (!is_string($value)) {
+            throw new UnexpectedValueException($value, 'string');
+        }
+
+        $validator = KeyValidator::createAll();
+
+        if ($validator->validate($value)) {
+            return;
+        }
+
+        $this->context->buildViolation($constraint->message)
+            ->setParameter('{{ string }}', $value)
+            ->setCode(IsSshKey::NOT_SSH_KEY_ERROR)
+            ->addViolation();
+    }
+
+}
diff --git a/tests/IsSshKeyValidatorTest.php b/tests/IsSshKeyValidatorTest.php
new file mode 100644
index 0000000..e2f1ff1
--- /dev/null
+++ b/tests/IsSshKeyValidatorTest.php
@@ -0,0 +1,52 @@
+<?php
+
+declare(strict_types = 1);
+
+namespace Tests;
+
+use Symfony\Component\Validator\Test\ConstraintValidatorTestCase;
+use TroiaStudio\SshKeyValidator\IsSshKey;
+use TroiaStudio\SshKeyValidator\IsSshKeyValidator;
+
+class IsSshKeyValidatorTest extends ConstraintValidatorTestCase
+{
+
+    public function testNullIsValid(): void
+    {
+        $this->validator->validate(null, new IsSshKey());
+
+        $this->assertNoViolation();
+    }
+
+    public function testBlankIsValid(): void
+    {
+        $this->validator->validate('', new IsSshKey());
+
+        $this->assertNoViolation();
+    }
+
+    public function testKeyIsValid(): void
+    {
+        $this->validator->validate('ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAINCqSM/QRXfw4xbJo+DIW4k9Ehks9hpxMyN/SoFvJHNZ test ed25519', new IsSshKey());
+
+        $this->assertNoViolation();
+    }
+
+    public function testKeyIsInValid(): void
+    {
+        $key = 'sshed25519 AAAAC3NzaC1lZDI1NTE5AAAAINCqSM/QRXfw4xbJo+DIW4k9Ehks9hpxMyN/SoFvJHNZ test ed25519';
+        $isSshKey = new IsSshKey();
+        $this->validator->validate($key, $isSshKey);
+
+        $this->buildViolation($isSshKey->message)
+            ->setParameter('{{ string }}', $key)
+            ->setCode(IsSshKey::NOT_SSH_KEY_ERROR)
+            ->assertRaised();
+    }
+
+    protected function createValidator(): IsSshKeyValidator
+    {
+        return new IsSshKeyValidator();
+    }
+
+}