chore: validate against legacy wrapping on client but customer passes keyring with no legacy wrapping

src/main/java/software/amazon/encryption/s3/S3EncryptionClient.java

@@ -3,6 +3,7 @@
 package software.amazon.encryption.s3;
 
 import edu.umd.cs.findbugs.annotations.SuppressFBWarnings;
+import org.apache.commons.logging.LogFactory;
 import software.amazon.awssdk.auth.credentials.AwsCredentialsProvider;
 import software.amazon.awssdk.awscore.AwsRequestOverrideConfiguration;
 import software.amazon.awssdk.awscore.exception.AwsServiceException;
@@ -61,6 +62,7 @@
 import software.amazon.encryption.s3.materials.MultipartConfiguration;
 import software.amazon.encryption.s3.materials.PartialRsaKeyPair;
 import software.amazon.encryption.s3.materials.RsaKeyring;
+import software.amazon.encryption.s3.materials.S3Keyring;
 
 import javax.crypto.SecretKey;
 import java.io.IOException;
@@ -1068,6 +1070,12 @@ public S3EncryptionClient build() {
             if (!onlyOneNonNull(_cryptoMaterialsManager, _keyring, _aesKey, _rsaKeyPair, _kmsKeyId)) {
                 throw new S3EncryptionClientException("Exactly one must be set of: crypto materials manager, keyring, AES key, RSA key pair, KMS key id");
             }
+            if (_enableLegacyWrappingAlgorithms && _keyring !=null) {
+                S3Keyring keyring = (S3Keyring) _keyring;
+                if (!keyring.areLegacyWrappingAlgorithmsEnabled()) {
+                    LogFactory.getLog(getClass()).warn("enableLegacyWrappingAlgorithms is set on the client, but is not set on the keyring provided. In order to enable legacy wrapping algorithms, set enableLegacyWrappingAlgorithms to true in the keyring's builder.");
+                }
+            }
 
             if (_bufferSize >= 0) {
                 if (_enableDelayedAuthenticationMode) {

src/main/java/software/amazon/encryption/s3/materials/S3Keyring.java

@@ -33,6 +33,11 @@ protected S3Keyring(Builder<?, ?> builder) {
         _dataKeyGenerator = builder._dataKeyGenerator;
     }
 
+    /**
+     * @return true if legacy wrapping algorithms are enabled, false otherwise
+     */
+    public boolean areLegacyWrappingAlgorithmsEnabled() { return _enableLegacyWrappingAlgorithms;}
+
     /**
      * Generates a data key using the provided EncryptionMaterials and the configured DataKeyGenerator.
      * <p>

src/test/java/software/amazon/encryption/s3/S3EncryptionClientCompatibilityTest.java

@@ -15,15 +15,9 @@
 import com.amazonaws.services.s3.model.EncryptedPutObjectRequest;
 import com.amazonaws.services.s3.model.EncryptionMaterials;
 import com.amazonaws.services.s3.model.EncryptionMaterialsProvider;
-import com.amazonaws.services.s3.model.GetObjectMetadataRequest;
-import com.amazonaws.services.s3.model.InitiateMultipartUploadRequest;
-import com.amazonaws.services.s3.model.InitiateMultipartUploadResult;
 import com.amazonaws.services.s3.model.KMSEncryptionMaterials;
 import com.amazonaws.services.s3.model.KMSEncryptionMaterialsProvider;
-import com.amazonaws.services.s3.model.ObjectMetadata;
 import com.amazonaws.services.s3.model.StaticEncryptionMaterialsProvider;
-import com.amazonaws.services.s3.model.StorageClass;
-import com.amazonaws.services.s3.model.UploadObjectRequest;
 import org.junit.jupiter.api.BeforeAll;
 import org.junit.jupiter.api.Test;
 import software.amazon.awssdk.core.ResponseBytes;
@@ -34,25 +28,21 @@
 import software.amazon.awssdk.services.s3.model.MetadataDirective;
 import software.amazon.awssdk.services.s3.model.PutObjectRequest;
 import software.amazon.encryption.s3.internal.InstructionFileConfig;
-import software.amazon.encryption.s3.utils.BoundedInputStream;
 
 import javax.crypto.KeyGenerator;
 import javax.crypto.SecretKey;
 import java.io.ByteArrayInputStream;
 import java.io.IOException;
-import java.io.InputStream;
 import java.nio.charset.StandardCharsets;
 import java.security.KeyPair;
 import java.security.KeyPairGenerator;
 import java.security.NoSuchAlgorithmException;
 import java.util.HashMap;
 import java.util.Map;
-import java.util.concurrent.ExecutionException;
 
 import static org.junit.jupiter.api.Assertions.assertEquals;
-import static org.junit.jupiter.api.Assertions.assertNotEquals;
 import static org.junit.jupiter.api.Assertions.assertThrows;
-import static software.amazon.encryption.s3.S3EncryptionClient.builder;
+
 import static software.amazon.encryption.s3.S3EncryptionClient.withAdditionalConfiguration;
 import static software.amazon.encryption.s3.utils.S3EncryptionClientTestResources.BUCKET;
 import static software.amazon.encryption.s3.utils.S3EncryptionClientTestResources.KMS_KEY_ID;
@@ -976,4 +966,5 @@ public void nullMaterialDescriptionV3() {
         v3Client.close();
 
     }
+
 }