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mimaison pushed a commit to branch 3.8
in repository https://gitbox.apache.org/repos/asf/kafka.git


The following commit(s) were added to refs/heads/3.8 by this push:
     new b92ecb12556 MINOR: Cleanups in ConfigurationUtils (#18769)
b92ecb12556 is described below

commit b92ecb1255652925533af210524a053eb2ce4fa8
Author: Mickael Maison <[email protected]>
AuthorDate: Sat Feb 1 09:51:51 2025 +0100

    MINOR: Cleanups in ConfigurationUtils (#18769)
    
    
    Reviewers: Luke Chen <[email protected]>
---
 .../config/internals/BrokerSecurityConfigs.java    |  3 +
 .../secured/AccessTokenRetrieverFactory.java       |  1 +
 .../internals/secured/ConfigurationUtils.java      | 23 +++++++
 .../secured/VerificationKeyResolverFactory.java    |  1 +
 .../secured/AccessTokenRetrieverFactoryTest.java   | 27 ++++++--
 .../internals/secured/ConfigurationUtilsTest.java  | 46 +++++++++++--
 .../VerificationKeyResolverFactoryTest.java        | 80 ++++++++++++++++++++++
 7 files changed, 173 insertions(+), 8 deletions(-)

diff --git 
a/clients/src/main/java/org/apache/kafka/common/config/internals/BrokerSecurityConfigs.java
 
b/clients/src/main/java/org/apache/kafka/common/config/internals/BrokerSecurityConfigs.java
index 767fa9aca01..ca3105c6123 100644
--- 
a/clients/src/main/java/org/apache/kafka/common/config/internals/BrokerSecurityConfigs.java
+++ 
b/clients/src/main/java/org/apache/kafka/common/config/internals/BrokerSecurityConfigs.java
@@ -115,4 +115,7 @@ public class BrokerSecurityConfigs {
     public final static String SASL_MECHANISM_INTER_BROKER_PROTOCOL_CONFIG = 
"sasl.mechanism.inter.broker.protocol";
     public final static String SASL_MECHANISM_INTER_BROKER_PROTOCOL_DOC = 
"SASL mechanism used for inter-broker communication. Default is GSSAPI.";
 
+    // The allowlist of the SASL OAUTHBEARER endpoints
+    public static final String ALLOWED_SASL_OAUTHBEARER_URLS_CONFIG = 
"org.apache.kafka.sasl.oauthbearer.allowed.urls";
+
 }
diff --git 
a/clients/src/main/java/org/apache/kafka/common/security/oauthbearer/internals/secured/AccessTokenRetrieverFactory.java
 
b/clients/src/main/java/org/apache/kafka/common/security/oauthbearer/internals/secured/AccessTokenRetrieverFactory.java
index ac224730597..1a9a2864a12 100644
--- 
a/clients/src/main/java/org/apache/kafka/common/security/oauthbearer/internals/secured/AccessTokenRetrieverFactory.java
+++ 
b/clients/src/main/java/org/apache/kafka/common/security/oauthbearer/internals/secured/AccessTokenRetrieverFactory.java
@@ -53,6 +53,7 @@ public class AccessTokenRetrieverFactory  {
         String saslMechanism,
         Map<String, Object> jaasConfig) {
         ConfigurationUtils cu = new ConfigurationUtils(configs, saslMechanism);
+        cu.throwIfURLIsNotAllowed(SASL_OAUTHBEARER_TOKEN_ENDPOINT_URL);
         URL tokenEndpointUrl = 
cu.validateUrl(SASL_OAUTHBEARER_TOKEN_ENDPOINT_URL);
 
         if 
(tokenEndpointUrl.getProtocol().toLowerCase(Locale.ROOT).equals("file")) {
diff --git 
a/clients/src/main/java/org/apache/kafka/common/security/oauthbearer/internals/secured/ConfigurationUtils.java
 
b/clients/src/main/java/org/apache/kafka/common/security/oauthbearer/internals/secured/ConfigurationUtils.java
index 99bc20661bb..499d0c4f37f 100644
--- 
a/clients/src/main/java/org/apache/kafka/common/security/oauthbearer/internals/secured/ConfigurationUtils.java
+++ 
b/clients/src/main/java/org/apache/kafka/common/security/oauthbearer/internals/secured/ConfigurationUtils.java
@@ -22,11 +22,17 @@ import java.net.MalformedURLException;
 import java.net.URISyntaxException;
 import java.net.URL;
 import java.nio.file.Path;
+import java.util.Arrays;
 import java.util.Locale;
 import java.util.Map;
+import java.util.Set;
+import java.util.stream.Collectors;
+
 import org.apache.kafka.common.config.ConfigException;
 import org.apache.kafka.common.network.ListenerName;
 
+import static 
org.apache.kafka.common.config.internals.BrokerSecurityConfigs.ALLOWED_SASL_OAUTHBEARER_URLS_CONFIG;
+
 /**
  * <code>ConfigurationUtils</code> is a utility class to perform basic 
configuration-related
  * logic and is separated out here for easier, more direct testing.
@@ -218,4 +224,21 @@ public class ConfigurationUtils {
         return (T) configs.get(name);
     }
 
+    // make sure the url is in the 
"org.apache.kafka.sasl.oauthbearer.allowed.urls" system property
+    public void throwIfURLIsNotAllowed(String urlConfig) {
+        String allowedUrlsProp = 
System.getProperty(ALLOWED_SASL_OAUTHBEARER_URLS_CONFIG);
+        if (allowedUrlsProp == null) {
+            // by default, we accept all URLs
+            return;
+        }
+        Set<String> allowedUrlsList = Arrays.stream(allowedUrlsProp.split(","))
+                .map(String::trim)
+                .collect(Collectors.toSet());
+
+        String value = get(urlConfig);
+        if (!allowedUrlsList.contains(value)) {
+            throw new IllegalArgumentException(value + " is not allowed. 
Update system property '"
+                    + ALLOWED_SASL_OAUTHBEARER_URLS_CONFIG + "' to allow " + 
value);
+        }
+    }
 }
diff --git 
a/clients/src/main/java/org/apache/kafka/common/security/oauthbearer/internals/secured/VerificationKeyResolverFactory.java
 
b/clients/src/main/java/org/apache/kafka/common/security/oauthbearer/internals/secured/VerificationKeyResolverFactory.java
index 3eb8dd64ba1..de0bf4b7e0a 100644
--- 
a/clients/src/main/java/org/apache/kafka/common/security/oauthbearer/internals/secured/VerificationKeyResolverFactory.java
+++ 
b/clients/src/main/java/org/apache/kafka/common/security/oauthbearer/internals/secured/VerificationKeyResolverFactory.java
@@ -55,6 +55,7 @@ public class VerificationKeyResolverFactory {
         String saslMechanism,
         Map<String, Object> jaasConfig) {
         ConfigurationUtils cu = new ConfigurationUtils(configs, saslMechanism);
+        cu.throwIfURLIsNotAllowed(SASL_OAUTHBEARER_JWKS_ENDPOINT_URL);
         URL jwksEndpointUrl = 
cu.validateUrl(SASL_OAUTHBEARER_JWKS_ENDPOINT_URL);
 
         if 
(jwksEndpointUrl.getProtocol().toLowerCase(Locale.ROOT).equals("file")) {
diff --git 
a/clients/src/test/java/org/apache/kafka/common/security/oauthbearer/internals/secured/AccessTokenRetrieverFactoryTest.java
 
b/clients/src/test/java/org/apache/kafka/common/security/oauthbearer/internals/secured/AccessTokenRetrieverFactoryTest.java
index 741b4d2566d..40d5c0ea6ea 100644
--- 
a/clients/src/test/java/org/apache/kafka/common/security/oauthbearer/internals/secured/AccessTokenRetrieverFactoryTest.java
+++ 
b/clients/src/test/java/org/apache/kafka/common/security/oauthbearer/internals/secured/AccessTokenRetrieverFactoryTest.java
@@ -17,17 +17,25 @@
 
 package org.apache.kafka.common.security.oauthbearer.internals.secured;
 
-import static 
org.apache.kafka.common.config.SaslConfigs.SASL_OAUTHBEARER_TOKEN_ENDPOINT_URL;
-import static org.junit.jupiter.api.Assertions.assertEquals;
 
 import java.io.File;
 import java.util.Collections;
 import java.util.Map;
 import org.apache.kafka.common.config.ConfigException;
+import org.junit.jupiter.api.AfterEach;
 import org.junit.jupiter.api.Test;
 
+import static 
org.apache.kafka.common.config.SaslConfigs.SASL_OAUTHBEARER_TOKEN_ENDPOINT_URL;
+import static 
org.apache.kafka.common.config.internals.BrokerSecurityConfigs.ALLOWED_SASL_OAUTHBEARER_URLS_CONFIG;
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
 public class AccessTokenRetrieverFactoryTest extends OAuthBearerTest {
 
+    @AfterEach
+    public void tearDown() throws Exception {
+        System.clearProperty(ALLOWED_SASL_OAUTHBEARER_URLS_CONFIG);
+    }
+
     @Test
     public void testConfigureRefreshingFileAccessTokenRetriever() throws 
Exception {
         String expected = "{}";
@@ -47,14 +55,15 @@ public class AccessTokenRetrieverFactoryTest extends 
OAuthBearerTest {
     @Test
     public void 
testConfigureRefreshingFileAccessTokenRetrieverWithInvalidDirectory() {
         // Should fail because the parent path doesn't exist.
-        Map<String, ?> configs = 
getSaslConfigs(SASL_OAUTHBEARER_TOKEN_ENDPOINT_URL, new 
File("/tmp/this-directory-does-not-exist/foo.json").toURI().toString());
+        String file = new 
File("/tmp/this-directory-does-not-exist/foo.json").toURI().toString();
+        Map<String, ?> configs = 
getSaslConfigs(SASL_OAUTHBEARER_TOKEN_ENDPOINT_URL, file);
         Map<String, Object> jaasConfig = Collections.emptyMap();
         assertThrowsWithMessage(ConfigException.class, () -> 
AccessTokenRetrieverFactory.create(configs, jaasConfig), "that doesn't exist");
     }
 
     @Test
     public void 
testConfigureRefreshingFileAccessTokenRetrieverWithInvalidFile() throws 
Exception {
-        // Should fail because the while the parent path exists, the file 
itself doesn't.
+        // Should fail because while the parent path exists, the file itself 
doesn't.
         File tmpDir = createTempDir("this-directory-does-exist");
         File accessTokenFile = new File(tmpDir, 
"this-file-does-not-exist.json");
         Map<String, ?> configs = 
getSaslConfigs(SASL_OAUTHBEARER_TOKEN_ENDPOINT_URL, 
accessTokenFile.toURI().toString());
@@ -62,4 +71,14 @@ public class AccessTokenRetrieverFactoryTest extends 
OAuthBearerTest {
         assertThrowsWithMessage(ConfigException.class, () -> 
AccessTokenRetrieverFactory.create(configs, jaasConfig), "that doesn't exist");
     }
 
+    @Test
+    public void testSaslOauthbearerTokenEndpointUrlIsNotAllowed() throws 
Exception {
+        // Should fail because the file is not in the allowed list
+        File tmpDir = createTempDir("not_allowed");
+        File accessTokenFile = new File(tmpDir, "not_allowed.json");
+        System.setProperty(ALLOWED_SASL_OAUTHBEARER_URLS_CONFIG, "nothing");
+        Map<String, ?> configs = 
getSaslConfigs(SASL_OAUTHBEARER_TOKEN_ENDPOINT_URL, 
accessTokenFile.toURI().toString());
+        assertThrowsWithMessage(IllegalArgumentException.class, () -> 
AccessTokenRetrieverFactory.create(configs, Collections.emptyMap()),
+                ALLOWED_SASL_OAUTHBEARER_URLS_CONFIG);
+    }
 }
diff --git 
a/clients/src/test/java/org/apache/kafka/common/security/oauthbearer/internals/secured/ConfigurationUtilsTest.java
 
b/clients/src/test/java/org/apache/kafka/common/security/oauthbearer/internals/secured/ConfigurationUtilsTest.java
index b1ed7c16529..0d3df183ae3 100644
--- 
a/clients/src/test/java/org/apache/kafka/common/security/oauthbearer/internals/secured/ConfigurationUtilsTest.java
+++ 
b/clients/src/test/java/org/apache/kafka/common/security/oauthbearer/internals/secured/ConfigurationUtilsTest.java
@@ -17,17 +17,30 @@
 
 package org.apache.kafka.common.security.oauthbearer.internals.secured;
 
+import org.apache.kafka.common.config.ConfigException;
+import org.apache.kafka.test.TestUtils;
+
+import org.junit.jupiter.api.AfterEach;
+import org.junit.jupiter.api.Test;
+
 import java.io.File;
 import java.io.IOException;
 import java.util.Collections;
+import java.util.HashMap;
 import java.util.Map;
-import org.apache.kafka.common.config.ConfigException;
-import org.apache.kafka.test.TestUtils;
-import org.junit.jupiter.api.Test;
+
+import static 
org.apache.kafka.common.config.internals.BrokerSecurityConfigs.ALLOWED_SASL_OAUTHBEARER_URLS_CONFIG;
+import static org.junit.jupiter.api.Assertions.assertDoesNotThrow;
 
 public class ConfigurationUtilsTest extends OAuthBearerTest {
 
-    private final static String URL_CONFIG_NAME = "url";
+    private static final String URL_CONFIG_NAME = "url";
+    private static final String FILE_CONFIG_NAME = "file";
+
+    @AfterEach
+    public void tearDown() throws Exception {
+        System.clearProperty(ALLOWED_SASL_OAUTHBEARER_URLS_CONFIG);
+    }
 
     @Test
     public void testUrl() {
@@ -127,6 +140,31 @@ public class ConfigurationUtilsTest extends 
OAuthBearerTest {
         assertThrowsWithMessage(ConfigException.class, () -> testFile("    "), 
"must not contain only whitespace");
     }
 
+    @Test
+    public void testAllowedSaslOauthbearerUrlSystemProperty() {
+        String url = "http://www.example.com";;
+        String fileUrl = "file:///etc/passwd";
+        Map<String, Object> configs = new HashMap<>();
+        configs.put(URL_CONFIG_NAME, url);
+        configs.put(FILE_CONFIG_NAME, fileUrl);
+        ConfigurationUtils cu = new ConfigurationUtils(configs);
+
+        // By default, all URLs are allowed
+        assertDoesNotThrow(() -> cu.throwIfURLIsNotAllowed(URL_CONFIG_NAME));
+        assertDoesNotThrow(() -> cu.throwIfURLIsNotAllowed(FILE_CONFIG_NAME));
+
+        // add one url into allowed list
+        System.setProperty(ALLOWED_SASL_OAUTHBEARER_URLS_CONFIG, url);
+        assertDoesNotThrow(() -> cu.throwIfURLIsNotAllowed(URL_CONFIG_NAME));
+        assertThrowsWithMessage(IllegalArgumentException.class, () -> 
cu.throwIfURLIsNotAllowed(FILE_CONFIG_NAME),
+                ALLOWED_SASL_OAUTHBEARER_URLS_CONFIG);
+
+        // add all urls into allowed list
+        System.setProperty(ALLOWED_SASL_OAUTHBEARER_URLS_CONFIG, url + "," + 
fileUrl);
+        assertDoesNotThrow(() -> cu.throwIfURLIsNotAllowed(URL_CONFIG_NAME));
+        assertDoesNotThrow(() -> cu.throwIfURLIsNotAllowed(FILE_CONFIG_NAME));
+    }
+
     protected void testFile(String value) {
         Map<String, Object> configs = 
Collections.singletonMap(URL_CONFIG_NAME, value);
         ConfigurationUtils cu = new ConfigurationUtils(configs);
diff --git 
a/clients/src/test/java/org/apache/kafka/common/security/oauthbearer/internals/secured/VerificationKeyResolverFactoryTest.java
 
b/clients/src/test/java/org/apache/kafka/common/security/oauthbearer/internals/secured/VerificationKeyResolverFactoryTest.java
new file mode 100644
index 00000000000..0c4abd3cbe1
--- /dev/null
+++ 
b/clients/src/test/java/org/apache/kafka/common/security/oauthbearer/internals/secured/VerificationKeyResolverFactoryTest.java
@@ -0,0 +1,80 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.kafka.common.security.oauthbearer.internals.secured;
+
+import org.apache.kafka.common.config.ConfigException;
+
+import org.junit.jupiter.api.AfterEach;
+import org.junit.jupiter.api.Test;
+
+import java.io.File;
+import java.util.Collections;
+import java.util.Map;
+
+import static 
org.apache.kafka.common.config.SaslConfigs.SASL_OAUTHBEARER_JWKS_ENDPOINT_URL;
+import static 
org.apache.kafka.common.config.internals.BrokerSecurityConfigs.ALLOWED_SASL_OAUTHBEARER_URLS_CONFIG;
+
+public class VerificationKeyResolverFactoryTest extends OAuthBearerTest {
+
+    @AfterEach
+    public void tearDown() throws Exception {
+        System.clearProperty(ALLOWED_SASL_OAUTHBEARER_URLS_CONFIG);
+    }
+
+    @Test
+    public void testConfigureRefreshingFileVerificationKeyResolver() throws 
Exception {
+        File tmpDir = createTempDir("access-token");
+        File verificationKeyFile = createTempFile(tmpDir, "access-token-", 
".json", "{}");
+
+        Map<String, ?> configs = 
Collections.singletonMap(SASL_OAUTHBEARER_JWKS_ENDPOINT_URL, 
verificationKeyFile.toURI().toString());
+        Map<String, Object> jaasConfig = Collections.emptyMap();
+
+        // verify it won't throw exception
+        try (CloseableVerificationKeyResolver verificationKeyResolver = 
VerificationKeyResolverFactory.create(configs, jaasConfig)) { }
+    }
+
+    @Test
+    public void 
testConfigureRefreshingFileVerificationKeyResolverWithInvalidDirectory() {
+        // Should fail because the parent path doesn't exist.
+        String file = new 
File("/tmp/this-directory-does-not-exist/foo.json").toURI().toString();
+        Map<String, ?> configs = 
getSaslConfigs(SASL_OAUTHBEARER_JWKS_ENDPOINT_URL, file);
+        Map<String, Object> jaasConfig = Collections.emptyMap();
+        assertThrowsWithMessage(ConfigException.class, () -> 
VerificationKeyResolverFactory.create(configs, jaasConfig), "that doesn't 
exist");
+    }
+
+    @Test
+    public void 
testConfigureRefreshingFileVerificationKeyResolverWithInvalidFile() throws 
Exception {
+        // Should fail because while the parent path exists, the file itself 
doesn't.
+        File tmpDir = createTempDir("this-directory-does-exist");
+        File verificationKeyFile = new File(tmpDir, 
"this-file-does-not-exist.json");
+        Map<String, ?> configs = 
getSaslConfigs(SASL_OAUTHBEARER_JWKS_ENDPOINT_URL, 
verificationKeyFile.toURI().toString());
+        Map<String, Object> jaasConfig = Collections.emptyMap();
+        assertThrowsWithMessage(ConfigException.class, () -> 
VerificationKeyResolverFactory.create(configs, jaasConfig), "that doesn't 
exist");
+    }
+
+    @Test
+    public void testSaslOauthbearerTokenEndpointUrlIsNotAllowed() throws 
Exception {
+        // Should fail because the file is not in the allowed list
+        File tmpDir = createTempDir("not_allowed");
+        File verificationKeyFile = new File(tmpDir, "not_allowed.json");
+        System.setProperty(ALLOWED_SASL_OAUTHBEARER_URLS_CONFIG, "nothing");
+        Map<String, ?> configs = 
getSaslConfigs(SASL_OAUTHBEARER_JWKS_ENDPOINT_URL, 
verificationKeyFile.toURI().toString());
+        assertThrowsWithMessage(IllegalArgumentException.class, () -> 
VerificationKeyResolverFactory.create(configs, Collections.emptyMap()),
+                ALLOWED_SASL_OAUTHBEARER_URLS_CONFIG);
+    }
+}

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