TransferUtilityDownloadDirectoryRequest is missing SSE-C properties

fixes #3147

sdk/src/Services/S3/Custom/Transfer/Internal/DownloadDirectoryCommand.cs

@@ -98,7 +98,10 @@ private TransferUtilityDownloadRequest ConstructTransferUtilityDownloadRequest(S
             downloadRequest.Key = s3Object.Key;
             var file = s3Object.Key.Substring(prefixLength).Replace('/', Path.DirectorySeparatorChar);
             downloadRequest.FilePath = Path.Combine(this._request.LocalDirectory, file);
-
+            downloadRequest.ServerSideEncryptionCustomerMethod = this._request.ServerSideEncryptionCustomerMethod;
+            downloadRequest.ServerSideEncryptionCustomerProvidedKey = this._request.ServerSideEncryptionCustomerProvidedKey;
+            downloadRequest.ServerSideEncryptionCustomerProvidedKeyMD5 = this._request.ServerSideEncryptionCustomerProvidedKeyMD5;
+
             //Ensure the target file is a rooted within LocalDirectory. Otherwise error.
             if(!InternalSDKUtils.IsFilePathRootedWithDirectoryPath(downloadRequest.FilePath, _request.LocalDirectory))
             {

sdk/src/Services/S3/Custom/Transfer/TransferUtilityDownloadDirectoryRequest.cs

@@ -27,6 +27,7 @@
 using System.Linq;
 using Amazon.S3.Model;
 using Amazon.Util;
+using Amazon.Runtime.Internal;
 using System.Globalization;
 
 
@@ -47,6 +48,10 @@ public class TransferUtilityDownloadDirectoryRequest
         private DateTime? unmodifiedSinceDateUtc;
         private bool disableSlashCorrection = false;
 
+        private ServerSideEncryptionCustomerMethod serverSideCustomerEncryption;
+        private string serverSideEncryptionCustomerProvidedKey;
+        private string serverSideEncryptionCustomerProvidedKeyMD5;
+
         /// <summary>
         /// 	Gets or sets the name of the bucket.
         /// </summary>
@@ -255,6 +260,47 @@ public bool DisableSlashCorrection
             set { this.disableSlashCorrection = value; }
         }
 
+        /// <summary>
+        /// The Server-side encryption algorithm to be used with the customer provided key.
+        /// </summary>
+        public ServerSideEncryptionCustomerMethod ServerSideEncryptionCustomerMethod
+        {
+            get { return this.serverSideCustomerEncryption; }
+            set { this.serverSideCustomerEncryption = value; }
+        }
+
+        /// <summary>
+        /// The base64-encoded encryption key for Amazon S3 to use to decrypt the object
+        /// <para>
+        /// Using the encryption key you provide as part of your request Amazon S3 manages both the encryption, as it writes 
+        /// to disks, and decryption, when you access your objects. Therefore, you don't need to maintain any data encryption code. The only 
+        /// thing you do is manage the encryption keys you provide.
+        /// </para>
+        /// <para>
+        /// When you retrieve an object, you must provide the same encryption key as part of your request. Amazon S3 first verifies 
+        /// the encryption key you provided matches, and then decrypts the object before returning the object data to you.
+        /// </para>
+        /// <para>
+        /// Important: Amazon S3 does not store the encryption key you provide.
+        /// </para>
+        /// </summary>
+        [AWSProperty(Sensitive = true)]
+        public string ServerSideEncryptionCustomerProvidedKey
+        {
+            get { return this.serverSideEncryptionCustomerProvidedKey; }
+            set { this.serverSideEncryptionCustomerProvidedKey = value; }
+        }
+
+        /// <summary>
+        /// The MD5 of the customer encryption key specified in the ServerSideEncryptionCustomerProvidedKey property. The MD5 is
+        /// base 64 encoded. This field is optional, the SDK will calculate the MD5 if this is not set.
+        /// </summary>
+        public string ServerSideEncryptionCustomerProvidedKeyMD5
+        {
+            get { return this.serverSideEncryptionCustomerProvidedKeyMD5; }
+            set { this.serverSideEncryptionCustomerProvidedKeyMD5 = value; }
+        }
+
         /// <summary>
         /// The event for DownloadedDirectoryProgressEvent notifications. All
         /// subscribers will be notified when a new progress