def copy_source_sse_md5(params, **kwargs):
 _sse_md5(params, 'CopySourceSSECustomer')

def copy_source_sse_md5 ( params , ** kwargs ) : _sse_md5 ( params , 'CopySourceSSECustomer' )
s3 server-side encryption requires the encryption key to be sent to the server base64 encoded .