prabhashkr commented on code in PR #21483: URL: https://github.com/apache/kafka/pull/21483#discussion_r2888665146
########## clients/src/test/java/org/apache/kafka/common/security/oauthbearer/internals/secured/assertion/AssertionSupplierFactoryTest.java: ########## @@ -0,0 +1,327 @@ +/* + * 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.assertion; + +import org.apache.kafka.common.security.oauthbearer.JwtRetrieverException; +import org.apache.kafka.common.security.oauthbearer.internals.secured.ConfigurationUtils; +import org.apache.kafka.common.security.oauthbearer.internals.secured.OAuthBearerTest; +import org.apache.kafka.common.utils.MockTime; +import org.apache.kafka.common.utils.Time; + +import org.jose4j.jwt.consumer.JwtConsumer; +import org.jose4j.jwt.consumer.JwtConsumerBuilder; +import org.jose4j.jwt.consumer.JwtContext; +import org.junit.jupiter.api.Test; + +import java.io.File; +import java.security.KeyPair; +import java.security.PublicKey; + +import static org.apache.kafka.common.config.SaslConfigs.SASL_OAUTHBEARER_ASSERTION_ALGORITHM; +import static org.apache.kafka.common.config.SaslConfigs.SASL_OAUTHBEARER_ASSERTION_CLAIM_AUD; +import static org.apache.kafka.common.config.SaslConfigs.SASL_OAUTHBEARER_ASSERTION_CLAIM_EXP_SECONDS; +import static org.apache.kafka.common.config.SaslConfigs.SASL_OAUTHBEARER_ASSERTION_CLAIM_ISS; +import static org.apache.kafka.common.config.SaslConfigs.SASL_OAUTHBEARER_ASSERTION_CLAIM_JTI_INCLUDE; +import static org.apache.kafka.common.config.SaslConfigs.SASL_OAUTHBEARER_ASSERTION_CLAIM_NBF_SECONDS; +import static org.apache.kafka.common.config.SaslConfigs.SASL_OAUTHBEARER_ASSERTION_CLAIM_SUB; +import static org.apache.kafka.common.config.SaslConfigs.SASL_OAUTHBEARER_ASSERTION_FILE; +import static org.apache.kafka.common.config.SaslConfigs.SASL_OAUTHBEARER_ASSERTION_PRIVATE_KEY_FILE; +import static org.apache.kafka.common.config.SaslConfigs.SASL_OAUTHBEARER_ASSERTION_PRIVATE_KEY_PASSPHRASE; +import static org.apache.kafka.common.config.SaslConfigs.SASL_OAUTHBEARER_ASSERTION_TEMPLATE_FILE; +import static org.apache.kafka.test.TestUtils.tempFile; +import static org.junit.jupiter.api.Assertions.assertDoesNotThrow; +import static org.junit.jupiter.api.Assertions.assertEquals; +import static org.junit.jupiter.api.Assertions.assertNotNull; +import static org.junit.jupiter.api.Assertions.assertThrows; +import static org.junit.jupiter.api.Assertions.assertTrue; +import static org.mockito.Mockito.mock; +import static org.mockito.Mockito.never; +import static org.mockito.Mockito.verify; +import static org.mockito.Mockito.when; + +public class AssertionSupplierFactoryTest extends OAuthBearerTest { + + /** + * When {@code SASL_OAUTHBEARER_ASSERTION_FILE} is configured, the factory should use file-based + * assertion creation and return the JWT from the file. + */ + @Test + public void testCreateWithAssertionFile() throws Exception { + String expectedJwt = createJwt("test-subject"); + File jwtFile = tempFile(expectedJwt); + + ConfigurationUtils cu = mock(ConfigurationUtils.class); + when(cu.validateString(SASL_OAUTHBEARER_ASSERTION_FILE, false)).thenReturn(jwtFile.getAbsolutePath()); + when(cu.validateFile(SASL_OAUTHBEARER_ASSERTION_FILE)).thenReturn(jwtFile); + + Time time = new MockTime(); + + try (CloseableSupplier<String> supplier = AssertionSupplierFactory.create(cu, time)) { + String assertion = supplier.get(); + assertEquals(expectedJwt, assertion); + } + } + + /** + * When no assertion file is configured, the factory should fall back to locally-generated + * assertions using the private key and signing algorithm. + */ + @Test + public void testCreateWithPrivateKeyFile() throws Exception { + KeyPair keyPair = generateKeyPair(); + File privateKeyFile = generatePrivateKey(keyPair.getPrivate()); + + ConfigurationUtils cu = mockConfigForLocalAssertion(privateKeyFile); + + Time time = new MockTime(); + + try (CloseableSupplier<String> supplier = AssertionSupplierFactory.create(cu, time)) { + String assertion = supplier.get(); + assertNotNull(assertion); + assertValidJwtFormat(assertion); + assertClaims(keyPair.getPublic(), assertion); + } + } + + /** + * When static claims (aud, iss, sub) are configured alongside the private key, + * they should be included in the generated JWT assertion. + */ + @Test + public void testCreateWithPrivateKeyFileAndStaticClaims() throws Exception { + KeyPair keyPair = generateKeyPair(); + File privateKeyFile = generatePrivateKey(keyPair.getPrivate()); + + ConfigurationUtils cu = mockConfigForLocalAssertion(privateKeyFile); + // Override static claims to be present + when(cu.containsKey(SASL_OAUTHBEARER_ASSERTION_CLAIM_AUD)).thenReturn(true); + when(cu.validateString(SASL_OAUTHBEARER_ASSERTION_CLAIM_AUD)).thenReturn("https://auth.example.com";); + when(cu.containsKey(SASL_OAUTHBEARER_ASSERTION_CLAIM_ISS)).thenReturn(true); + when(cu.validateString(SASL_OAUTHBEARER_ASSERTION_CLAIM_ISS)).thenReturn("my-client"); + when(cu.containsKey(SASL_OAUTHBEARER_ASSERTION_CLAIM_SUB)).thenReturn(true); + when(cu.validateString(SASL_OAUTHBEARER_ASSERTION_CLAIM_SUB)).thenReturn("service-account"); + + Time time = new MockTime(); + + try (CloseableSupplier<String> supplier = AssertionSupplierFactory.create(cu, time)) { + String assertion = supplier.get(); + assertNotNull(assertion); + assertValidJwtFormat(assertion); + // Use a consumer that expects the configured audience + assertClaimsWithAudience(keyPair.getPublic(), assertion, "https://auth.example.com";); + } + } + + /** + * When a passphrase is configured, the factory should read it via + * {@code validatePassword} and pass it to the {@code DefaultAssertionCreator}. + * Providing a passphrase for an unencrypted key is an invalid combination and + * should result in a {@code JwtRetrieverException} because the raw key bytes + * cannot be parsed as an {@code EncryptedPrivateKeyInfo} structure. + */ + @Test + public void testCreateWithPassphraseReadsPasswordConfig() throws Exception { + KeyPair keyPair = generateKeyPair(); + File privateKeyFile = generatePrivateKey(keyPair.getPrivate()); + + ConfigurationUtils cu = mockConfigForLocalAssertion(privateKeyFile); + // Enable passphrase config + when(cu.containsKey(SASL_OAUTHBEARER_ASSERTION_PRIVATE_KEY_PASSPHRASE)).thenReturn(true); + when(cu.validatePassword(SASL_OAUTHBEARER_ASSERTION_PRIVATE_KEY_PASSPHRASE)).thenReturn("my-passphrase"); + + Time time = new MockTime(); + + // Providing a passphrase for an unencrypted key triggers an error during key loading + assertThrows(JwtRetrieverException.class, () -> AssertionSupplierFactory.create(cu, time)); + + // Verify that the password config was read from configuration + verify(cu).validatePassword(SASL_OAUTHBEARER_ASSERTION_PRIVATE_KEY_PASSPHRASE); + } + + /** + * When the passphrase config key is absent, the factory should not attempt to read + * a password and should produce a working supplier with the unencrypted private key. + */ + @Test + public void testCreateWithoutPassphraseDoesNotReadPasswordConfig() throws Exception { + KeyPair keyPair = generateKeyPair(); + File privateKeyFile = generatePrivateKey(keyPair.getPrivate()); + + ConfigurationUtils cu = mockConfigForLocalAssertion(privateKeyFile); + // Passphrase not configured (already the default from mockConfigForLocalAssertion) + + Time time = new MockTime(); + + try (CloseableSupplier<String> supplier = AssertionSupplierFactory.create(cu, time)) { + String assertion = supplier.get(); + assertNotNull(assertion); + assertClaims(keyPair.getPublic(), assertion); + } + + // Verify that validatePassword was never called + verify(cu, never()).validatePassword(SASL_OAUTHBEARER_ASSERTION_PRIVATE_KEY_PASSPHRASE); + } + + /** + * The file-based supplier should return the same value on consecutive calls since + * the file contents haven't changed. + */ + @Test + public void testFileBasedSupplierReturnsSameValueOnMultipleCalls() throws Exception { + String expectedJwt = createJwt("repeated-calls"); + File jwtFile = tempFile(expectedJwt); + + ConfigurationUtils cu = mock(ConfigurationUtils.class); + when(cu.validateString(SASL_OAUTHBEARER_ASSERTION_FILE, false)).thenReturn(jwtFile.getAbsolutePath()); + when(cu.validateFile(SASL_OAUTHBEARER_ASSERTION_FILE)).thenReturn(jwtFile); + + Time time = new MockTime(); + + try (CloseableSupplier<String> supplier = AssertionSupplierFactory.create(cu, time)) { + String first = supplier.get(); + String second = supplier.get(); + assertEquals(first, second); + assertEquals(expectedJwt, first); + } + } + + /** + * The locally-generated supplier should produce different assertions on each call + * since timestamps (iat, exp, nbf) are regenerated. + */ + @Test + public void testLocallyGeneratedSupplierProducesConsistentAssertions() throws Exception { + KeyPair keyPair = generateKeyPair(); + File privateKeyFile = generatePrivateKey(keyPair.getPrivate()); + + ConfigurationUtils cu = mockConfigForLocalAssertion(privateKeyFile); + Time time = new MockTime(); + + try (CloseableSupplier<String> supplier = AssertionSupplierFactory.create(cu, time)) { + String first = supplier.get(); + String second = supplier.get(); + assertNotNull(first); + assertNotNull(second); + // Both should be valid JWTs + assertClaims(keyPair.getPublic(), first); + assertClaims(keyPair.getPublic(), second); + } + } + + /** + * When the underlying file is deleted after factory creation, calling get() should + * throw a JwtRetrieverException since the assertion creator cannot read the file. + */ + @Test + public void testSupplierGetWrapsExceptionInJwtRetrieverException() throws Exception { + String jwt = createJwt("will-be-deleted"); + File jwtFile = tempFile(jwt); + + ConfigurationUtils cu = mock(ConfigurationUtils.class); + when(cu.validateString(SASL_OAUTHBEARER_ASSERTION_FILE, false)).thenReturn(jwtFile.getAbsolutePath()); + when(cu.validateFile(SASL_OAUTHBEARER_ASSERTION_FILE)).thenReturn(jwtFile); + + Time time = new MockTime(); + + try (CloseableSupplier<String> supplier = AssertionSupplierFactory.create(cu, time)) { + // Delete the file so the read will fail + assertTrue(jwtFile.delete()); + assertThrows(JwtRetrieverException.class, supplier::get); + } + } + + /** + * Closing the supplier should not throw any exceptions. + */ + @Test + public void testSupplierCloseDoesNotThrow() throws Exception { + String expectedJwt = createJwt("close-test"); + File jwtFile = tempFile(expectedJwt); + + ConfigurationUtils cu = mock(ConfigurationUtils.class); + when(cu.validateString(SASL_OAUTHBEARER_ASSERTION_FILE, false)).thenReturn(jwtFile.getAbsolutePath()); + when(cu.validateFile(SASL_OAUTHBEARER_ASSERTION_FILE)).thenReturn(jwtFile); + + Time time = new MockTime(); + + CloseableSupplier<String> supplier = AssertionSupplierFactory.create(cu, time); + // Verify close does not throw + assertDoesNotThrow(supplier::close); + } + + /** + * After closing the supplier, the underlying resources should be released. + * Verify that the supplier can be closed multiple times without error. + */ + @Test + public void testSupplierCanBeClosedMultipleTimes() throws Exception { + String expectedJwt = createJwt("multi-close"); + File jwtFile = tempFile(expectedJwt); + + ConfigurationUtils cu = mock(ConfigurationUtils.class); + when(cu.validateString(SASL_OAUTHBEARER_ASSERTION_FILE, false)).thenReturn(jwtFile.getAbsolutePath()); + when(cu.validateFile(SASL_OAUTHBEARER_ASSERTION_FILE)).thenReturn(jwtFile); + + Time time = new MockTime(); + + CloseableSupplier<String> supplier = AssertionSupplierFactory.create(cu, time); + assertDoesNotThrow(supplier::close); + assertDoesNotThrow(supplier::close); + } + + private void assertValidJwtFormat(String jwt) { + String[] parts = jwt.split("\\."); + assertEquals(3, parts.length, "JWT should have 3 parts (header.payload.signature), but was: " + jwt); Review Comment: added a comment -- This is an automated message from the Apache Git Service. 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