fix: Update user agent string to correctly reflect version (#141)

* fix: Update user agent string to correctly reflect version

Author: farleyb-amazon

sdk1/pom.xml

@@ -272,6 +272,13 @@
     </repositories>
 
     <build>
+        <resources>
+            <resource>
+                <directory>src/main/resources</directory>
+                <filtering>true</filtering>
+            </resource>
+        </resources>
+
         <plugins>
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>

sdk1/src/main/java/com/amazonaws/services/dynamodbv2/datamodeling/encryption/providers/DirectKmsMaterialProvider.java

@@ -30,7 +30,6 @@
 import com.amazonaws.services.kms.model.GenerateDataKeyRequest;
 import com.amazonaws.services.kms.model.GenerateDataKeyResult;
 import com.amazonaws.util.StringUtils;
-import com.amazonaws.util.VersionInfoUtils;
 
 import javax.crypto.SecretKey;
 import javax.crypto.spec.SecretKeySpec;
@@ -43,6 +42,7 @@
 import static com.amazonaws.services.dynamodbv2.datamodeling.encryption.materials.WrappedRawMaterials.CONTENT_KEY_ALGORITHM;
 import static com.amazonaws.services.dynamodbv2.datamodeling.encryption.materials.WrappedRawMaterials.ENVELOPE_KEY;
 import static com.amazonaws.services.dynamodbv2.datamodeling.encryption.materials.WrappedRawMaterials.KEY_WRAPPING_ALGORITHM;
+import static com.amazonaws.services.dynamodbv2.datamodeling.internal.Utils.loadVersion;
 
 /**
  * Generates a unique data key for each record in DynamoDB and protects that key
@@ -53,9 +53,8 @@
  * @see <a href="http://docs.aws.amazon.com/kms/latest/developerguide/encrypt-context.html">KMS Encryption Context</a>
  */
 public class DirectKmsMaterialProvider implements EncryptionMaterialsProvider {
-    private static final String VERSION_STRING = "1.0";
-    private static final String USER_AGENT = DirectKmsMaterialProvider.class.getName()
-            + "/" + VERSION_STRING + "/" + VersionInfoUtils.getVersion();
+    static final String USER_AGENT_PREFIX = "DynamodbEncryptionSdkJava/";
+    private static final String USER_AGENT = USER_AGENT_PREFIX + loadVersion();
     private static final String COVERED_ATTR_CTX_KEY = "aws-kms-ec-attr";
     private static final String SIGNING_KEY_ALGORITHM = "amzn-ddb-sig-alg";
     private static final String TABLE_NAME_EC_KEY = "*aws-kms-table*";

sdk1/src/main/java/com/amazonaws/services/dynamodbv2/datamodeling/internal/Utils.java

@@ -14,7 +14,9 @@
  */
 package com.amazonaws.services.dynamodbv2.datamodeling.internal;
 
+import java.io.IOException;
 import java.security.SecureRandom;
+import java.util.Properties;
 
 public class Utils {
     private static final ThreadLocal<SecureRandom> RND = new ThreadLocal<SecureRandom>() {
@@ -47,4 +49,18 @@ public static <V> V checkNotNull(final V ref, final String errMsg) {
             return ref;
         }
     }
+
+    /*
+     * Loads the version of the library
+     */
+    public static String loadVersion() {
+        try {
+            final Properties properties = new Properties();
+            properties.load(ClassLoader.getSystemResourceAsStream("project.properties"));
+            return properties.getProperty("version");
+        } catch (final IOException ex) {
+            return "unknown";
+        }
+    }
+
 }

sdk1/src/main/resources/project.properties

@@ -0,0 +1 @@
+version=${project.version}

sdk1/src/test/java/com/amazonaws/services/dynamodbv2/datamodeling/encryption/providers/DirectKmsMaterialProviderTest.java

@@ -12,6 +12,7 @@
  */
 package com.amazonaws.services.dynamodbv2.datamodeling.encryption.providers;
 
+import com.amazonaws.RequestClientOptions;
 import com.amazonaws.services.dynamodbv2.datamodeling.DynamoDBMappingException;
 import com.amazonaws.services.dynamodbv2.datamodeling.encryption.EncryptionContext;
 import com.amazonaws.services.dynamodbv2.datamodeling.encryption.materials.DecryptionMaterials;
@@ -337,6 +338,19 @@ public GenerateDataKeyResult generateDataKey(GenerateDataKeyRequest r) {
         assertTrue(gdkCalled.get());
     }
 
+    @Test
+    public void userAgentIsAdded() {
+        AWSKMS kmsSpy = new FakeKMS() {
+            @Override
+            public GenerateDataKeyResult generateDataKey(GenerateDataKeyRequest r) {
+                assertTrue(r.getRequestClientOptions().getClientMarker(RequestClientOptions.Marker.USER_AGENT)
+                        .contains(DirectKmsMaterialProvider.USER_AGENT_PREFIX));
+                return super.generateDataKey(r);
+            }
+        };
+        new DirectKmsMaterialProvider(kmsSpy, keyId).getEncryptionMaterials(ctx);
+    }
+
     private static class ExtendedKmsMaterialProvider extends DirectKmsMaterialProvider {
         private final String encryptionKeyIdAttributeName;