User jwt sessions can now be endless

Committed-by: Eduard Heimbuch <eduard.heimbuch@cloudogu.com>
Co-authored-by: tzerr <thomas.zerr@cloudogu.com>

Reviewed-by: Konstantin Schaper <konstantin.schaper@cloudogu.com>

docs/en/administration/jwt-configuration.md

@@ -0,0 +1,26 @@
+---
+title: JWT Configuration
+---
+
+SCM-Manager uses [JWT](https://datatracker.ietf.org/doc/html/rfc7519) to authenticate its users.
+The creation of JWTs can be controlled via Java system properties.
+
+## Endless JWT
+
+Usually a JWT contains the exp claim. This claim determines how long a JWT is valid by defining an expiration time.
+If the JWT does not contain this claim, then the JWT is valid forever until the secret for the signature changes.
+Per default the JWT created by the SCM-Manager contain the exp claim with a duration of one hour.
+
+If needed, it is possible to configure the SCM-Manager, so that the JWT get created without the exp claim.
+Therefore, the user session would be endless.
+
+We advise **against** this behavior, because limited lifespans for JWT improve security.
+But if you really need it, you can enable endless JWT by starting the SCM-Manager with this flag:
+
+```
+-Dscm.endlessJwt="true"
+```
+
+If you want to disable the feature, then restart the SCM-Manager without this flag.
+If you want to invalidate already created endless JWT, then restarting the SCM-Manager, with the endless JWT feature disabled, is enough.
+The SCM-Manager will automatically create new secrets for the JWT and therefore invalidate every already existing JWT.

gradle/changelog/endless_user_sessions.yml

@@ -0,0 +1,2 @@
+- type: added
+  description: User sessions can now be configured to be endless

scm-webapp/src/main/java/sonia/scm/lifecycle/jwt/JwtSettings.java

@@ -0,0 +1,44 @@
+/*
+ * MIT License
+ *
+ * Copyright (c) 2020-present Cloudogu GmbH and Contributors
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+package sonia.scm.lifecycle.jwt;
+
+import lombok.AllArgsConstructor;
+import lombok.Data;
+import lombok.NoArgsConstructor;
+
+import javax.xml.bind.annotation.XmlAccessType;
+import javax.xml.bind.annotation.XmlAccessorType;
+import javax.xml.bind.annotation.XmlRootElement;
+
+@Data
+@XmlRootElement(name = "jwtSettings")
+@XmlAccessorType(XmlAccessType.FIELD)
+@NoArgsConstructor
+@AllArgsConstructor
+public class JwtSettings {
+
+  private boolean endlessJwtEnabledLastStartUp = false;
+  private long keysValidAfterTimestampInMs = 0;
+}

scm-webapp/src/main/java/sonia/scm/lifecycle/jwt/JwtSettingsStartupAction.java

@@ -0,0 +1,87 @@
+/*
+ * MIT License
+ *
+ * Copyright (c) 2020-present Cloudogu GmbH and Contributors
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+package sonia.scm.lifecycle.jwt;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import sonia.scm.lifecycle.PrivilegedStartupAction;
+import sonia.scm.plugin.Extension;
+import sonia.scm.security.JwtSystemProperties;
+
+import javax.inject.Inject;
+import java.time.Clock;
+import java.time.Instant;
+
+@Extension
+public class JwtSettingsStartupAction implements PrivilegedStartupAction {
+
+  private static final Logger LOG = LoggerFactory.getLogger(JwtSettingsStartupAction.class);
+  private final JwtSettingsStore store;
+  private final Clock clock;
+
+  @Inject
+  public JwtSettingsStartupAction(JwtSettingsStore store) {
+    this(store, Clock.systemDefaultZone());
+  }
+
+  public JwtSettingsStartupAction(JwtSettingsStore store, Clock clock) {
+    this.store = store;
+    this.clock = clock;
+  }
+
+  @Override
+  public void run() {
+    LOG.debug("Checking JWT Settings");
+
+    JwtSettings settings = store.get();
+    boolean isEndlessJwtEnabledNow = JwtSystemProperties.isEndlessJwtEnabled();
+
+    if(!areSettingsChanged(settings, isEndlessJwtEnabledNow)) {
+      LOG.debug("JWT Settings unchanged");
+      return;
+    }
+
+    JwtSettings updatedSettings = new JwtSettings();
+    updatedSettings.setEndlessJwtEnabledLastStartUp(isEndlessJwtEnabledNow);
+
+    if(areEndlessJwtNeedingInvalidation(settings, isEndlessJwtEnabledNow)) {
+      updatedSettings.setKeysValidAfterTimestampInMs(Instant.now(clock).toEpochMilli());
+    } else {
+      updatedSettings.setKeysValidAfterTimestampInMs(settings.getKeysValidAfterTimestampInMs());
+    }
+
+    store.set(updatedSettings);
+
+    LOG.debug("JWT Settings updated");
+  }
+
+  private boolean areSettingsChanged(JwtSettings settings, boolean isEndlessJwtEnabledNow) {
+    return settings.isEndlessJwtEnabledLastStartUp() != isEndlessJwtEnabledNow;
+  }
+
+  private boolean areEndlessJwtNeedingInvalidation(JwtSettings settings, boolean isEndlessJwtEnabledNow) {
+    return settings.isEndlessJwtEnabledLastStartUp() && !isEndlessJwtEnabledNow;
+  }
+}

scm-webapp/src/main/java/sonia/scm/lifecycle/jwt/JwtSettingsStore.java

@@ -0,0 +1,51 @@
+/*
+ * MIT License
+ *
+ * Copyright (c) 2020-present Cloudogu GmbH and Contributors
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+package sonia.scm.lifecycle.jwt;
+
+import sonia.scm.store.ConfigurationStore;
+import sonia.scm.store.ConfigurationStoreFactory;
+
+import javax.inject.Inject;
+import javax.inject.Singleton;
+
+@Singleton
+public class JwtSettingsStore {
+
+  static final String STORE_NAME = "jwt-settings";
+  private final ConfigurationStore<JwtSettings> store;
+
+  @Inject
+  public JwtSettingsStore(ConfigurationStoreFactory storeFactory) {
+    store = storeFactory.withType(JwtSettings.class).withName(STORE_NAME).build();
+  }
+
+  public JwtSettings get() {
+    return store.getOptional().orElse(new JwtSettings());
+  }
+
+  public void set(JwtSettings settings) {
+    store.set(settings);
+  }
+}

scm-webapp/src/main/java/sonia/scm/security/JwtAccessTokenBuilder.java

@@ -45,6 +45,8 @@ import java.util.HashMap;
 import java.util.Map;
 import java.util.concurrent.TimeUnit;
 
+import static sonia.scm.security.JwtSystemProperties.ENDLESS_JWT;
+
 /**
  * Jwt implementation of {@link AccessTokenBuilder}.
  *
@@ -184,9 +186,11 @@ public final class JwtAccessTokenBuilder implements AccessTokenBuilder {
     Claims claims = Jwts.claims(customClaims)
       .setSubject(sub)
       .setId(id)
-      .setIssuedAt(Date.from(now))
-      .setExpiration(new Date(now.toEpochMilli() + expiration));
+      .setIssuedAt(Date.from(now));
 
+    if(!JwtSystemProperties.isEndlessJwtEnabled()) {
+      claims.setExpiration(new Date(now.toEpochMilli() + expiration));
+    }
 
     if (refreshableFor > 0) {
       long re = refreshableForUnit.toMillis(refreshableFor);

scm-webapp/src/main/java/sonia/scm/security/JwtSystemProperties.java

@@ -0,0 +1,34 @@
+/*
+ * MIT License
+ *
+ * Copyright (c) 2020-present Cloudogu GmbH and Contributors
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+package sonia.scm.security;
+
+public class JwtSystemProperties {
+
+  public static final String ENDLESS_JWT = "scm.endlessJwt";
+
+  public static boolean isEndlessJwtEnabled() {
+    return Boolean.parseBoolean(System.getProperty(ENDLESS_JWT));
+  }
+}

scm-webapp/src/main/java/sonia/scm/security/SecureKeyResolver.java

@@ -36,6 +36,8 @@ import io.jsonwebtoken.SigningKeyResolverAdapter;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
+import sonia.scm.lifecycle.jwt.JwtSettings;
+import sonia.scm.lifecycle.jwt.JwtSettingsStore;
 import sonia.scm.store.ConfigurationEntryStore;
 import sonia.scm.store.ConfigurationEntryStoreFactory;
 
@@ -82,16 +84,17 @@ public class SecureKeyResolver extends SigningKeyResolverAdapter
    */
   @Inject
   @SuppressWarnings("unchecked")
-  public SecureKeyResolver(ConfigurationEntryStoreFactory storeFactory) {
-    this(storeFactory, new SecureRandom());
+  public SecureKeyResolver(ConfigurationEntryStoreFactory storeFactory, JwtSettingsStore jwtSettingsStore) {
+    this(storeFactory, jwtSettingsStore, new SecureRandom());
   }
 
-  SecureKeyResolver(ConfigurationEntryStoreFactory storeFactory, Random random)
+  SecureKeyResolver(ConfigurationEntryStoreFactory storeFactory, JwtSettingsStore jwtSettingsStore, Random random)
   {
     store = storeFactory
       .withType(SecureKey.class)
       .withName(STORE_NAME)
       .build();
+    this.jwtSettingsStore = jwtSettingsStore;
     this.random = random;
   }
 
@@ -109,13 +112,7 @@ public class SecureKeyResolver extends SigningKeyResolverAdapter
 
     checkArgument(!Strings.isNullOrEmpty(subject), "subject is required");
 
-    SecureKey key = store.get(subject);
-
-    if (key == null) {
-      return getSecureKey(subject).getBytes();
-    }
-
-    return key.getBytes();
+    return getSecureKey(subject).getBytes();
   }
 
   //~--- get methods ----------------------------------------------------------
@@ -132,7 +129,7 @@ public class SecureKeyResolver extends SigningKeyResolverAdapter
   {
     SecureKey key = store.get(subject);
 
-    if (key == null)
+    if (key == null || isKeyExpired(key))
     {
       logger.trace("create new key for subject");
       key = createNewKey();
@@ -142,6 +139,12 @@ public class SecureKeyResolver extends SigningKeyResolverAdapter
     return key;
   }
 
+  private boolean isKeyExpired(SecureKey key) {
+    JwtSettings settings = jwtSettingsStore.get();
+
+    return key.getCreationDate() < settings.getKeysValidAfterTimestampInMs();
+  }
+
   //~--- methods --------------------------------------------------------------
 
   /**
@@ -166,4 +169,6 @@ public class SecureKeyResolver extends SigningKeyResolverAdapter
 
   /** configuration entry store */
   private final ConfigurationEntryStore<SecureKey> store;
+
+  private final JwtSettingsStore jwtSettingsStore;
 }

scm-webapp/src/main/java/sonia/scm/web/security/TokenRefreshFilter.java

@@ -105,7 +105,7 @@ public class TokenRefreshFilter extends HttpFilter {
       LOG.trace("could not resolve token", e);
       return;
     }
-    if (accessToken instanceof JwtAccessToken) {
+    if (accessToken instanceof JwtAccessToken && !isEndlessToken((JwtAccessToken) accessToken)) {
       refresher.refresh((JwtAccessToken) accessToken)
         .ifPresent(jwtAccessToken -> refreshJwtToken(request, response, jwtAccessToken));
     }
@@ -116,4 +116,8 @@ public class TokenRefreshFilter extends HttpFilter {
     LOG.debug("refreshing JWT authentication token");
     issuer.authenticate(request, response, jwtAccessToken);
   }
+
+  private boolean isEndlessToken(JwtAccessToken token) {
+    return token.getExpiration() == null;
+  }
 }

scm-webapp/src/test/java/sonia/scm/lifecycle/jwt/JwtSettingsStartupActionTest.java

@@ -0,0 +1,114 @@
+/*
+ * MIT License
+ *
+ * Copyright (c) 2020-present Cloudogu GmbH and Contributors
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+package sonia.scm.lifecycle.jwt;
+
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.ExtendWith;
+import org.junit.jupiter.params.ParameterizedTest;
+import org.junit.jupiter.params.provider.CsvSource;
+import org.mockito.Mock;
+import org.mockito.junit.jupiter.MockitoExtension;
+import sonia.scm.security.JwtSystemProperties;
+
+import java.time.Clock;
+import java.time.Instant;
+import java.time.ZoneId;
+
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.mockito.ArgumentMatchers.argThat;
+import static org.mockito.Mockito.verify;
+import static org.mockito.Mockito.verifyNoMoreInteractions;
+import static org.mockito.Mockito.when;
+
+@ExtendWith(MockitoExtension.class)
+class JwtSettingsStartupActionTest {
+
+  private JwtSettingsStartupAction jwtSettingsAction;
+
+  @Mock
+  private JwtSettingsStore jwtSettingsStore;
+
+  private final Clock clock = Clock.fixed(Instant.now(), ZoneId.systemDefault());
+
+  @BeforeEach
+  void setupAction() {
+    jwtSettingsAction = new JwtSettingsStartupAction(jwtSettingsStore, clock);
+  }
+
+  @BeforeEach
+  void clearSystemProperties() {
+    System.clearProperty(JwtSystemProperties.ENDLESS_JWT);
+  }
+
+  @ParameterizedTest
+  @CsvSource({"true,true", "false,false"})
+  void shouldNotChangeSettings(String isEndlessJwtNowEnabled, String isEndlessJwtEnabledLastStartUp) {
+    System.setProperty(JwtSystemProperties.ENDLESS_JWT, isEndlessJwtNowEnabled);
+    JwtSettings settings = new JwtSettings(Boolean.parseBoolean(isEndlessJwtEnabledLastStartUp), 0);
+    when(jwtSettingsStore.get()).thenReturn(settings);
+
+    jwtSettingsAction.run();
+
+    assertThat(settings.isEndlessJwtEnabledLastStartUp()).isEqualTo(Boolean.parseBoolean(isEndlessJwtNowEnabled));
+    assertThat(settings.getKeysValidAfterTimestampInMs()).isEqualTo(0);
+
+    verify(jwtSettingsStore).get();
+    verifyNoMoreInteractions(jwtSettingsStore);
+  }
+
+  @Test
+  void shouldOnlyUpdateEndlessJwtEnabledLastStartup() {
+    System.setProperty(JwtSystemProperties.ENDLESS_JWT, "true");
+    JwtSettings settings = new JwtSettings(false, 0);
+    when(jwtSettingsStore.get()).thenReturn(settings);
+
+    jwtSettingsAction.run();
+
+
+    verify(jwtSettingsStore).get();
+    verify(jwtSettingsStore).set(argThat(actualSettings -> {
+      assertThat(actualSettings.isEndlessJwtEnabledLastStartUp()).isEqualTo(true);
+      assertThat(actualSettings.getKeysValidAfterTimestampInMs()).isEqualTo(0);
+      return true;
+    }));
+  }
+
+  @Test
+  void shouldInvalidateKeys() {
+    System.setProperty(JwtSystemProperties.ENDLESS_JWT, "false");
+    JwtSettings settings = new JwtSettings(true, 0);
+    when(jwtSettingsStore.get()).thenReturn(settings);
+
+    jwtSettingsAction.run();
+
+    verify(jwtSettingsStore).get();
+    verify(jwtSettingsStore).set(argThat(actualSettings -> {
+      assertThat(actualSettings.isEndlessJwtEnabledLastStartUp()).isEqualTo(false);
+      assertThat(actualSettings.getKeysValidAfterTimestampInMs()).isEqualTo(Instant.now(clock).toEpochMilli());
+      return true;
+    }));
+  }
+}

scm-webapp/src/test/java/sonia/scm/security/JwtAccessTokenBuilderTest.java

@@ -95,6 +95,11 @@ class JwtAccessTokenBuilderTest {
     factory = new JwtAccessTokenBuilderFactory(keyGenerator, secureKeyResolver, enrichers);
   }
 
+  @BeforeEach
+  void clearSystemProperties() {
+    System.clearProperty(JwtSystemProperties.ENDLESS_JWT);
+  }
+
   @Nested
   class SimpleTests {
 
@@ -261,5 +266,70 @@ class JwtAccessTokenBuilderTest {
       JwtAccessToken token = factory.create().subject("dent").build();
       assertThat(token.getCustom("c")).get().isEqualTo("d");
     }
+
+
+  }
+
+  @Nested
+  class WithEndlessJwtFeature {
+
+    @Test
+    void testBuildWithEndlessJwtEnabled() {
+      System.setProperty(JwtSystemProperties.ENDLESS_JWT, "true");
+
+      JwtAccessToken token = factory.create().subject("Red").issuer("https://scm-manager.org").build();
+
+      assertThat(token.getId()).isNotEmpty();
+      assertThat(token.getIssuedAt()).isNotNull();
+      assertThat(token.getExpiration()).isNull();
+      assertThat(token.getSubject()).isEqualTo("Red");
+      assertThat(token.getIssuer()).isNotEmpty();
+      assertThat(token.getIssuer().get()).isEqualTo("https://scm-manager.org");
+    }
+
+    @Test
+    void testBuildWithEndlessJwtDisabled() {
+      System.setProperty(JwtSystemProperties.ENDLESS_JWT, "false");
+
+      JwtAccessToken token = factory.create().subject("Red").issuer("https://scm-manager.org").build();
+
+      assertThat(token.getId()).isNotEmpty();
+      assertThat(token.getIssuedAt()).isNotNull();
+      assertThat(token.getExpiration()).isNotNull();
+      assertThat(token.getExpiration().getTime() > token.getIssuedAt().getTime()).isTrue();
+      assertThat(token.getSubject()).isEqualTo("Red");
+      assertThat(token.getIssuer()).isNotEmpty();
+      assertThat(token.getIssuer().get()).isEqualTo("https://scm-manager.org");
+    }
+
+    @Test
+    void testBuildWithInvalidConfig() {
+      System.setProperty(JwtSystemProperties.ENDLESS_JWT, "invalidStuff");
+
+      JwtAccessToken token = factory.create().subject("Red").issuer("https://scm-manager.org").build();
+
+      assertThat(token.getId()).isNotEmpty();
+      assertThat(token.getIssuedAt()).isNotNull();
+      assertThat(token.getExpiration()).isNotNull();
+      assertThat(token.getExpiration().getTime() > token.getIssuedAt().getTime()).isTrue();
+      assertThat(token.getSubject()).isEqualTo("Red");
+      assertThat(token.getIssuer()).isNotEmpty();
+      assertThat(token.getIssuer().get()).isEqualTo("https://scm-manager.org");
+    }
+
+    @Test
+    void testBuildWithMissingConfig() {
+      System.clearProperty(JwtSystemProperties.ENDLESS_JWT);
+
+      JwtAccessToken token = factory.create().subject("Red").issuer("https://scm-manager.org").build();
+
+      assertThat(token.getId()).isNotEmpty();
+      assertThat(token.getIssuedAt()).isNotNull();
+      assertThat(token.getExpiration()).isNotNull();
+      assertThat(token.getExpiration().getTime() > token.getIssuedAt().getTime()).isTrue();
+      assertThat(token.getSubject()).isEqualTo("Red");
+      assertThat(token.getIssuer()).isNotEmpty();
+      assertThat(token.getIssuer().get()).isEqualTo("https://scm-manager.org");
+    }
   }
 }

scm-webapp/src/test/java/sonia/scm/security/SecureKeyResolverTest.java

@@ -32,12 +32,16 @@ import org.junit.Test;
 import org.junit.runner.RunWith;
 import org.mockito.Mock;
 import org.mockito.junit.MockitoJUnitRunner;
+import sonia.scm.lifecycle.jwt.JwtSettings;
+import sonia.scm.lifecycle.jwt.JwtSettingsStore;
 import sonia.scm.store.ConfigurationEntryStore;
 import sonia.scm.store.ConfigurationEntryStoreFactory;
 
+import java.util.Arrays;
 import java.util.Random;
 
 import static org.assertj.core.api.Assertions.assertThat;
+import static org.assertj.core.api.Assertions.not;
 import static org.junit.Assert.assertArrayEquals;
 import static org.junit.Assert.assertNotNull;
 import static org.junit.Assert.assertSame;
@@ -66,12 +70,30 @@ public class SecureKeyResolverTest
 
     assertNotNull(key);
     when(store.get("test")).thenReturn(key);
+    when(jwtSettingsStore.get()).thenReturn(settings);
 
     SecureKey sameKey = resolver.getSecureKey("test");
 
     assertSame(key, sameKey);
   }
 
+  @Test
+  public void shouldReturnRegeneratedKey() {
+    when(jwtSettingsStore.get()).thenReturn(settings);
+    SecureKey expiredKey = new SecureKey("oldKey".getBytes(), 0);
+    when(store.get("test")).thenReturn(expiredKey);
+
+    SecureKey regeneratedKey = resolver.getSecureKey("test");
+    assertThat(Arrays.equals(regeneratedKey.getBytes(), expiredKey.getBytes())).isFalse();
+    assertThat(regeneratedKey.getCreationDate() > settings.getKeysValidAfterTimestampInMs()).isTrue();
+
+
+    when(store.get("test")).thenReturn(regeneratedKey);
+    SecureKey sameRegeneratedKey = resolver.getSecureKey("test");
+    assertThat(Arrays.equals(sameRegeneratedKey.getBytes(), regeneratedKey.getBytes())).isTrue();
+    assertThat(sameRegeneratedKey.getCreationDate()).isEqualTo(regeneratedKey.getCreationDate());
+  }
+
   /**
    * Method description
    *
@@ -82,6 +104,7 @@ public class SecureKeyResolverTest
     SecureKey key = resolver.getSecureKey("test");
 
     when(store.get("test")).thenReturn(key);
+    when(jwtSettingsStore.get()).thenReturn(settings);
 
     byte[] bytes = resolver.resolveSigningKeyBytes(null,
                      Jwts.claims().setSubject("test"));
@@ -129,7 +152,7 @@ public class SecureKeyResolverTest
     }))).thenReturn(store);
     Random random = mock(Random.class);
     doAnswer(invocation -> ((byte[]) invocation.getArguments()[0])[0] = 42).when(random).nextBytes(any());
-    resolver = new SecureKeyResolver(factory, random);
+    resolver = new SecureKeyResolver(factory, jwtSettingsStore, random);
   }
 
   //~--- fields ---------------------------------------------------------------
@@ -140,4 +163,9 @@ public class SecureKeyResolverTest
   /** Field description */
   @Mock
   private ConfigurationEntryStore<SecureKey> store;
+
+  @Mock
+  private JwtSettingsStore jwtSettingsStore;
+
+  private JwtSettings settings = new JwtSettings(false, 100);
 }

scm-webapp/src/test/java/sonia/scm/web/security/TokenRefreshFilterTest.java

@@ -45,6 +45,7 @@ import javax.servlet.ServletException;
 import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletResponse;
 import java.io.IOException;
+import java.util.Date;
 import java.util.Set;
 
 import static java.util.Collections.singleton;
@@ -54,6 +55,7 @@ import static org.mockito.ArgumentMatchers.any;
 import static org.mockito.Mockito.mock;
 import static org.mockito.Mockito.never;
 import static org.mockito.Mockito.verify;
+import static org.mockito.Mockito.verifyNoInteractions;
 import static org.mockito.Mockito.when;
 import static sonia.scm.security.BearerToken.valueOf;
 
@@ -129,6 +131,7 @@ class TokenRefreshFilterTest {
     when(tokenGenerator.createToken(request)).thenReturn(token);
     when(resolver.resolve(token)).thenReturn(jwtToken);
     when(refresher.refresh(jwtToken)).thenReturn(of(newJwtToken));
+    when(jwtToken.getExpiration()).thenReturn(new Date());
 
     filter.doFilter(request, response, filterChain);
 
@@ -136,6 +139,21 @@ class TokenRefreshFilterTest {
     verify(filterChain).doFilter(request, response);
   }
 
+  @Test
+  void shouldNotRefreshEndlessToken() throws IOException, ServletException {
+    BearerToken token = createValidToken();
+    when(tokenGenerator.createToken(request)).thenReturn(token);
+
+    JwtAccessToken jwtToken = mock(JwtAccessToken.class);
+    when(resolver.resolve(token)).thenReturn(jwtToken);
+
+    filter.doFilter(request, response, filterChain);
+
+    verify(filterChain).doFilter(request, response);
+    verifyNoInteractions(refresher);
+    verifyNoInteractions(issuer);
+  }
+
   @Test
   void shouldTrackMetricIfTokenWasRefreshed() throws IOException, ServletException {
     BearerToken token = createValidToken();
@@ -144,6 +162,7 @@ class TokenRefreshFilterTest {
     when(tokenGenerator.createToken(request)).thenReturn(token);
     when(resolver.resolve(token)).thenReturn(jwtToken);
     when(refresher.refresh(jwtToken)).thenReturn(of(newJwtToken));
+    when(jwtToken.getExpiration()).thenReturn(new Date());
 
     filter.doFilter(request, response, filterChain);