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commit afe9df74619dfddc3a13235cbf3b4b9b63194726
Author: Benoit TELLIER <[email protected]>
AuthorDate: Wed Jun 19 11:19:42 2024 +0200

    JAMES-4044 Implement SenderHasLDAPAttribute matcher
---
 .../transport/matchers/SenderHasLDAPAttribute.java | 130 ++++++++++++++
 .../matchers/SenderHasLDAPAttributeTest.java       | 198 +++++++++++++++++++++
 2 files changed, 328 insertions(+)

diff --git 
a/server/mailet/ldap/src/main/java/org/apache/james/transport/matchers/SenderHasLDAPAttribute.java
 
b/server/mailet/ldap/src/main/java/org/apache/james/transport/matchers/SenderHasLDAPAttribute.java
new file mode 100644
index 0000000000..e4103d4f00
--- /dev/null
+++ 
b/server/mailet/ldap/src/main/java/org/apache/james/transport/matchers/SenderHasLDAPAttribute.java
@@ -0,0 +1,130 @@
+/****************************************************************
+ * 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.james.transport.matchers;
+
+import java.util.Collection;
+import java.util.Optional;
+
+import jakarta.inject.Inject;
+import jakarta.mail.MessagingException;
+
+import org.apache.james.core.Domain;
+import org.apache.james.core.MailAddress;
+import org.apache.james.user.ldap.LDAPConnectionFactory;
+import org.apache.james.user.ldap.LdapRepositoryConfiguration;
+import org.apache.mailet.Mail;
+import org.apache.mailet.base.GenericMatcher;
+
+import com.github.fge.lambdas.Throwing;
+import com.google.common.collect.ImmutableList;
+import com.google.common.collect.ImmutableSet;
+import com.unboundid.ldap.sdk.Attribute;
+import com.unboundid.ldap.sdk.Filter;
+import com.unboundid.ldap.sdk.LDAPConnectionPool;
+import com.unboundid.ldap.sdk.LDAPException;
+import com.unboundid.ldap.sdk.LDAPSearchException;
+import com.unboundid.ldap.sdk.SearchResult;
+import com.unboundid.ldap.sdk.SearchScope;
+
+public class SenderHasLDAPAttribute extends GenericMatcher {
+    private final LDAPConnectionPool ldapConnectionPool;
+    private final LdapRepositoryConfiguration configuration;
+    private final Filter objectClassFilter;
+    private final Optional<Filter> userExtraFilter;
+    private String attributeName;
+    private String attributeValue;
+    private String[] attributes;
+
+    @Inject
+    public SenderHasLDAPAttribute(LdapRepositoryConfiguration configuration) 
throws LDAPException {
+        this.configuration = configuration;
+        ldapConnectionPool = new 
LDAPConnectionFactory(this.configuration).getLdapConnectionPool();
+
+        userExtraFilter = Optional.ofNullable(configuration.getFilter())
+            .map(Throwing.function(Filter::create).sneakyThrow());
+        objectClassFilter = Filter.createEqualityFilter("objectClass", 
configuration.getUserObjectClass());
+    }
+
+    @Override
+    public void init() throws MessagingException {
+        String condition = getCondition().trim();
+        int commaPosition = condition.indexOf(':');
+
+        if (-1 == commaPosition) {
+            throw new MessagingException("Syntax Error. Missing ':'.");
+        }
+
+        if (0 == commaPosition) {
+            throw new MessagingException("Syntax Error. Missing attribute 
name.");
+        }
+
+        attributeName = condition.substring(0, commaPosition).trim();
+        attributeValue = condition.substring(commaPosition + 1).trim();
+        attributes = ImmutableSet.builder()
+            .add(configuration.getReturnedAttributes())
+            .add(attributeName)
+            .build().toArray(String[]::new);
+    }
+
+    @Override
+    public Collection<MailAddress> match(Mail mail) {
+        boolean matches = mail.getMaybeSender().asOptional()
+            .map(this::hasAttribute)
+            .orElse(false);
+        if (matches) {
+            return mail.getRecipients();
+        }
+        return ImmutableList.of();
+    }
+
+    private boolean hasAttribute(MailAddress rcpt) {
+        try {
+            SearchResult searchResult = 
ldapConnectionPool.search(userBase(rcpt),
+                SearchScope.SUB,
+                createFilter(rcpt.asString(), 
configuration.getUserIdAttribute()),
+                attributes);
+
+            return searchResult.getSearchEntries().stream()
+                .anyMatch(entry -> 
Optional.ofNullable(entry.getAttribute(attributeName))
+                    .map(Attribute::getValue)
+                    .map(attributeValue::equals)
+                    .orElse(false));
+
+        } catch (LDAPSearchException e) {
+            throw new RuntimeException("Failed searching LDAP", e);
+        }
+    }
+
+    private Filter createFilter(String retrievalName, String 
ldapUserRetrievalAttribute) {
+        Filter specificUserFilter = 
Filter.createEqualityFilter(ldapUserRetrievalAttribute, retrievalName);
+        return userExtraFilter
+            .map(extraFilter -> Filter.createANDFilter(objectClassFilter, 
specificUserFilter, extraFilter))
+            .orElseGet(() -> Filter.createANDFilter(objectClassFilter, 
specificUserFilter));
+    }
+
+    private String userBase(MailAddress mailAddress) {
+        return userBase(mailAddress.getDomain());
+    }
+
+    private String userBase(Domain domain) {
+        return configuration.getPerDomainBaseDN()
+            .getOrDefault(domain, configuration.getUserBase());
+    }
+}
diff --git 
a/server/mailet/ldap/src/test/java/org/apache/james/transport/matchers/SenderHasLDAPAttributeTest.java
 
b/server/mailet/ldap/src/test/java/org/apache/james/transport/matchers/SenderHasLDAPAttributeTest.java
new file mode 100644
index 0000000000..02ebabc2b3
--- /dev/null
+++ 
b/server/mailet/ldap/src/test/java/org/apache/james/transport/matchers/SenderHasLDAPAttributeTest.java
@@ -0,0 +1,198 @@
+/****************************************************************
+ * 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.james.transport.matchers;
+
+import static org.apache.james.user.ldap.DockerLdapSingleton.ADMIN;
+import static org.apache.james.user.ldap.DockerLdapSingleton.ADMIN_PASSWORD;
+import static org.assertj.core.api.Assertions.assertThat;
+
+import java.util.Collection;
+import java.util.Optional;
+
+import org.apache.commons.configuration2.HierarchicalConfiguration;
+import org.apache.commons.configuration2.plist.PropertyListConfiguration;
+import org.apache.commons.configuration2.tree.ImmutableNode;
+import org.apache.james.core.MailAddress;
+import org.apache.james.core.Username;
+import org.apache.james.user.ldap.DockerLdapSingleton;
+import org.apache.james.user.ldap.LdapGenericContainer;
+import org.apache.james.user.ldap.LdapRepositoryConfiguration;
+import org.apache.mailet.base.test.FakeMail;
+import org.apache.mailet.base.test.FakeMatcherConfig;
+import org.junit.jupiter.api.AfterAll;
+import org.junit.jupiter.api.BeforeAll;
+import org.junit.jupiter.api.Test;
+
+class SenderHasLDAPAttributeTest {
+
+    static LdapGenericContainer ldapContainer = 
DockerLdapSingleton.ldapContainer;
+
+    @BeforeAll
+    static void setUpAll() {
+        ldapContainer.start();
+    }
+
+    @AfterAll
+    static void afterAll() {
+        ldapContainer.stop();
+    }
+
+    @Test
+    void shouldReturnSenderWhenHasAttribute() throws Exception {
+        SenderHasLDAPAttribute testee = new 
SenderHasLDAPAttribute(LdapRepositoryConfiguration.from(ldapRepositoryConfigurationWithVirtualHosting(ldapContainer)));
+        FakeMatcherConfig matcherConfig = FakeMatcherConfig.builder()
+            .matcherName("HasLDAPAttribute")
+            .condition("description:abcdef")
+            .build();
+        testee.init(matcherConfig);
+
+        MailAddress sender = new MailAddress("[email protected]");
+        MailAddress recipient = new MailAddress("[email protected]");
+        Collection<MailAddress> matched = testee.match(FakeMail.builder()
+            .name("default-id")
+            .sender(sender)
+            .recipient(recipient)
+            .build());
+
+        assertThat(matched).containsOnly(recipient);
+    }
+
+    @Test
+    void shouldReturnEmptyWhenNoSender() throws Exception {
+        SenderHasLDAPAttribute testee = new 
SenderHasLDAPAttribute(LdapRepositoryConfiguration.from(ldapRepositoryConfigurationWithVirtualHosting(ldapContainer)));
+        FakeMatcherConfig matcherConfig = FakeMatcherConfig.builder()
+            .matcherName("HasLDAPAttribute")
+            .condition("description:abcdef")
+            .build();
+        testee.init(matcherConfig);
+
+        MailAddress recipient = new MailAddress("[email protected]");
+        Collection<MailAddress> matched = testee.match(FakeMail.builder()
+            .name("default-id")
+            .recipient(recipient)
+            .build());
+
+        assertThat(matched).isEmpty();
+    }
+
+    @Test
+    void shouldReturnEmptyWhenHasNoAttribute() throws Exception {
+        SenderHasLDAPAttribute testee = new 
SenderHasLDAPAttribute(LdapRepositoryConfiguration.from(ldapRepositoryConfigurationWithVirtualHosting(ldapContainer)));
+        FakeMatcherConfig matcherConfig = FakeMatcherConfig.builder()
+            .matcherName("HasLDAPAttribute")
+            .condition("description:abcdef")
+            .build();
+        testee.init(matcherConfig);
+
+        MailAddress sender = new MailAddress("[email protected]");
+        MailAddress recipient = new MailAddress("[email protected]");
+        Collection<MailAddress> matched = testee.match(FakeMail.builder()
+            .name("default-id")
+            .sender(sender)
+            .recipient(recipient)
+            .build());
+
+        assertThat(matched).isEmpty();
+    }
+
+    @Test
+    void shouldReturnEmptyWhenHasBadAttribute() throws Exception {
+        SenderHasLDAPAttribute testee = new 
SenderHasLDAPAttribute(LdapRepositoryConfiguration.from(ldapRepositoryConfigurationWithVirtualHosting(ldapContainer)));
+        FakeMatcherConfig matcherConfig = FakeMatcherConfig.builder()
+            .matcherName("HasLDAPAttribute")
+            .condition("description:abcdefg")
+            .build();
+        testee.init(matcherConfig);
+
+        MailAddress sender = new MailAddress("[email protected]");
+        MailAddress recipient = new MailAddress("[email protected]");
+        Collection<MailAddress> matched = testee.match(FakeMail.builder()
+            .name("default-id")
+            .sender(sender)
+            .recipient(recipient)
+            .build());
+
+        assertThat(matched).isEmpty();
+    }
+
+    @Test
+    void shouldReturnEmptyWhenHasPartialAttribute() throws Exception {
+        SenderHasLDAPAttribute testee = new 
SenderHasLDAPAttribute(LdapRepositoryConfiguration.from(ldapRepositoryConfigurationWithVirtualHosting(ldapContainer)));
+        FakeMatcherConfig matcherConfig = FakeMatcherConfig.builder()
+            .matcherName("HasLDAPAttribute")
+            .condition("description:abcde")
+            .build();
+        testee.init(matcherConfig);
+
+        MailAddress sender = new MailAddress("[email protected]");
+        MailAddress recipient = new MailAddress("[email protected]");
+        Collection<MailAddress> matched = testee.match(FakeMail.builder()
+            .name("default-id")
+            .sender(sender)
+            .recipient(recipient)
+            .build());
+
+        assertThat(matched).isEmpty();
+    }
+
+    @Test
+    void shouldReturnEmptyWhenHasLongerAttributeName() throws Exception {
+        SenderHasLDAPAttribute testee = new 
SenderHasLDAPAttribute(LdapRepositoryConfiguration.from(ldapRepositoryConfigurationWithVirtualHosting(ldapContainer)));
+        FakeMatcherConfig matcherConfig = FakeMatcherConfig.builder()
+            .matcherName("HasLDAPAttribute")
+            .condition("descriptionaaa:abcdef")
+            .build();
+        testee.init(matcherConfig);
+
+        MailAddress sender = new MailAddress("[email protected]");
+        MailAddress recipient = new MailAddress("[email protected]");
+        Collection<MailAddress> matched = testee.match(FakeMail.builder()
+            .name("default-id")
+                .sender(sender)
+            .recipient(recipient)
+            .build());
+
+        assertThat(matched).isEmpty();
+    }
+
+    static HierarchicalConfiguration<ImmutableNode> 
ldapRepositoryConfigurationWithVirtualHosting(LdapGenericContainer 
ldapContainer) {
+        return ldapRepositoryConfigurationWithVirtualHosting(ldapContainer, 
Optional.of(ADMIN));
+    }
+
+    static HierarchicalConfiguration<ImmutableNode> 
ldapRepositoryConfigurationWithVirtualHosting(LdapGenericContainer 
ldapContainer, Optional<Username> administrator) {
+        PropertyListConfiguration configuration = 
baseConfiguration(ldapContainer);
+        configuration.addProperty("[@userIdAttribute]", "mail");
+        configuration.addProperty("supportsVirtualHosting", true);
+        administrator.ifPresent(username -> 
configuration.addProperty("[@administratorId]", username.asString()));
+        return configuration;
+    }
+
+    private static PropertyListConfiguration 
baseConfiguration(LdapGenericContainer ldapContainer) {
+        PropertyListConfiguration configuration = new 
PropertyListConfiguration();
+        configuration.addProperty("[@ldapHost]", ldapContainer.getLdapHost());
+        configuration.addProperty("[@principal]", "cn=admin,dc=james,dc=org");
+        configuration.addProperty("[@credentials]", ADMIN_PASSWORD);
+        configuration.addProperty("[@userBase]", "ou=people,dc=james,dc=org");
+        configuration.addProperty("[@userObjectClass]", "inetOrgPerson");
+        configuration.addProperty("[@connectionTimeout]", "2000");
+        configuration.addProperty("[@readTimeout]", "2000");
+        return configuration;
+    }
+}
\ No newline at end of file


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