diff --git a/src/Bundle/ChillDocStoreBundle/AsyncUpload/Driver/LocalStorage/TempUrlLocalStorageGenerator.php b/src/Bundle/ChillDocStoreBundle/AsyncUpload/Driver/LocalStorage/TempUrlLocalStorageGenerator.php
index 81f69927c..957413b3a 100644
--- a/src/Bundle/ChillDocStoreBundle/AsyncUpload/Driver/LocalStorage/TempUrlLocalStorageGenerator.php
+++ b/src/Bundle/ChillDocStoreBundle/AsyncUpload/Driver/LocalStorage/TempUrlLocalStorageGenerator.php
@@ -14,16 +14,62 @@ namespace Chill\DocStoreBundle\AsyncUpload\Driver\LocalStorage;
 use Chill\DocStoreBundle\AsyncUpload\SignedUrl;
 use Chill\DocStoreBundle\AsyncUpload\SignedUrlPost;
 use Chill\DocStoreBundle\AsyncUpload\TempUrlGeneratorInterface;
+use Chill\DocStoreBundle\Entity\StoredObject;
+use Symfony\Component\Clock\ClockInterface;
+use Symfony\Component\Routing\Generator\UrlGeneratorInterface;
 
 class TempUrlLocalStorageGenerator implements TempUrlGeneratorInterface
 {
+    private const SIGNATURE_DURATION = 180;
+
+    public function __construct(
+        private readonly string $secret,
+        private readonly ClockInterface $clock,
+        private readonly UrlGeneratorInterface $urlGenerator,
+    ) {}
+
     public function generate(string $method, string $object_name, ?int $expire_delay = null): SignedUrl
     {
-        // TODO: Implement generate() method.
+        $expiration = $this->clock->now()->getTimestamp() + min($expire_delay ?? self::SIGNATURE_DURATION, self::SIGNATURE_DURATION);
+
+        return new SignedUrl(
+            $method,
+            $this->urlGenerator->generate('chill_docstore_stored_object_operate', [
+                'object_name' => $object_name,
+                'exp' => $expiration,
+                'sig' => $this->sign($method, $object_name, $expiration),
+            ], UrlGeneratorInterface::ABSOLUTE_URL),
+            \DateTimeImmutable::createFromFormat('U', (string) $expiration),
+            $object_name,
+        );
     }
 
     public function generatePost(?int $expire_delay = null, ?int $submit_delay = null, int $max_file_count = 1, ?string $object_name = null): SignedUrlPost
     {
-        // TODO: Implement generatePost() method.
+        $submitDelayComputed = min($submit_delay ?? self::SIGNATURE_DURATION, self::SIGNATURE_DURATION);
+        $expireDelayComputed = min($expire_delay ?? self::SIGNATURE_DURATION, self::SIGNATURE_DURATION);
+        $objectNameComputed = $object_name ?? StoredObject::generatePrefix();
+        $expiration = $this->clock->now()->getTimestamp() + $expireDelayComputed + $submitDelayComputed;
+
+        return new SignedUrlPost(
+            $this->urlGenerator->generate(
+                'chill_docstore_storedobject_post',
+                ['prefix' => $objectNameComputed],
+                UrlGeneratorInterface::ABSOLUTE_URL
+            ),
+            \DateTimeImmutable::createFromFormat('U', (string) $expiration),
+            $objectNameComputed,
+            15_000_000,
+            1,
+            $submitDelayComputed,
+            '',
+            $objectNameComputed,
+            $this->sign('POST', $object_name, $expiration),
+        );
+    }
+
+    private function sign(string $method, string $object_name, int $expiration): string
+    {
+        return hash_hmac('sha512', $method, sprintf('%s.%s.%s.%d', $method, $this->secret, $object_name, $expiration));
     }
 }
diff --git a/src/Bundle/ChillDocStoreBundle/Tests/AsyncUpload/Driver/LocalStorage/TempUrlLocalStorageGeneratorTest.php b/src/Bundle/ChillDocStoreBundle/Tests/AsyncUpload/Driver/LocalStorage/TempUrlLocalStorageGeneratorTest.php
new file mode 100644
index 000000000..f7170abcd
--- /dev/null
+++ b/src/Bundle/ChillDocStoreBundle/Tests/AsyncUpload/Driver/LocalStorage/TempUrlLocalStorageGeneratorTest.php
@@ -0,0 +1,78 @@
+<?php
+
+declare(strict_types=1);
+
+/*
+ * Chill is a software for social workers
+ *
+ * For the full copyright and license information, please view
+ * the LICENSE file that was distributed with this source code.
+ */
+
+namespace Chill\DocStoreBundle\Tests\AsyncUpload\Driver\LocalStorage;
+
+use Chill\DocStoreBundle\AsyncUpload\Driver\LocalStorage\TempUrlLocalStorageGenerator;
+use PHPUnit\Framework\TestCase;
+use Prophecy\PhpUnit\ProphecyTrait;
+use Symfony\Component\Clock\MockClock;
+use Symfony\Component\Routing\Generator\UrlGeneratorInterface;
+
+/**
+ * @internal
+ *
+ * @coversNothing
+ */
+class TempUrlLocalStorageGeneratorTest extends TestCase
+{
+    use ProphecyTrait;
+
+    public function testGenerate(): void
+    {
+        $urlGenerator = $this->prophesize(UrlGeneratorInterface::class);
+        $urlGenerator->generate('chill_docstore_stored_object_operate', [
+            'object_name' => 'testABC',
+            'exp' => $exp = 1734307200 + 180,
+            'sig' => '528a426aebea86ada86035e9f3299788a074b77d3f926c6c15492457f81e88cfa98b270ba489d5d7588612eadaeeb7717a57887b33932d6d449b5f441252e600',
+        ], UrlGeneratorInterface::ABSOLUTE_URL)
+            ->shouldBeCalled()
+            ->willReturn($url = 'http://example.com/public/doc-store/stored-object/operate/testABC');
+
+        $generator = $this->buildGenerator($urlGenerator->reveal());
+
+        $signedUrl = $generator->generate('GET', 'testABC');
+
+        self::assertEquals($url, $signedUrl->url);
+        self::assertEquals('testABC', $signedUrl->object_name);
+        self::assertEquals($exp, $signedUrl->expires->getTimestamp());
+        self::assertEquals('GET', $signedUrl->method);
+    }
+
+    public function testGeneratePost(): void
+    {
+        $urlGenerator = $this->prophesize(UrlGeneratorInterface::class);
+        $urlGenerator->generate('chill_docstore_storedobject_post', [
+            'prefix' => 'prefixABC',
+        ], UrlGeneratorInterface::ABSOLUTE_URL)
+            ->shouldBeCalled()
+            ->willReturn($url = 'http://example.com/public/doc-store/stored-object/prefixABC');
+
+        $generator = $this->buildGenerator($urlGenerator->reveal());
+
+        $signedUrl = $generator->generatePost(object_name: 'prefixABC');
+
+        self::assertEquals($url, $signedUrl->url);
+        self::assertEquals('prefixABC', $signedUrl->object_name);
+        self::assertEquals(1734307200 + 180 + 180, $signedUrl->expires->getTimestamp());
+        self::assertEquals('POST', $signedUrl->method);
+        self::assertEquals('47e9271917c6c9149a47248d88eeadcbc1f804138e445f3406d39f6aa51b2d976c2ee6e5b1196d2bf88852b627b330596c2fbf6f31b06837e9f41cf56103a4e4', $signedUrl->signature);
+    }
+
+    private function buildGenerator(UrlGeneratorInterface $urlGenerator): TempUrlLocalStorageGenerator
+    {
+        return new TempUrlLocalStorageGenerator(
+            'abc',
+            new MockClock('2024-12-16T00:00:00+00:00'),
+            $urlGenerator,
+        );
+    }
+}