Add multipart support in SSE-C encryption (#5576)

*) Add Put/Get support of multipart in encryption
*) Add GET Range support for encryption
*) Add CopyPart encrypted support
*) Support decrypting of large single PUT object

cmd/api-errors.go

@@ -129,6 +129,7 @@ const (
 
 	// Server-Side-Encryption (with Customer provided key) related API errors.
 	ErrInsecureSSECustomerRequest
+	ErrSSEMultipartEncrypted
 	ErrSSEEncryptedObject
 	ErrInvalidEncryptionParameters
 	ErrInvalidSSECustomerAlgorithm
@@ -631,6 +632,11 @@ var errorCodeResponse = map[APIErrorCode]APIError{
 		Description:    errInsecureSSERequest.Error(),
 		HTTPStatusCode: http.StatusBadRequest,
 	},
+	ErrSSEMultipartEncrypted: {
+		Code:           "InvalidRequest",
+		Description:    "The multipart upload initiate requested encryption. Subsequent part requests must include the appropriate encryption parameters.",
+		HTTPStatusCode: http.StatusBadRequest,
+	},
 	ErrSSEEncryptedObject: {
 		Code:           "InvalidRequest",
 		Description:    errEncryptedObject.Error(),