policy signature in base64 format use signature generated by this method for passing to ec2 bunding calls along with policy . concode_field_sep String policySignature concode_elem_sep String policyString concode_elem_sep String HMAC_SHA1_ALGORITHM concode_field_sep String base64Encode concode_elem_sep String signPolicy concode_elem_sep String getPolicyString
String function ( ) { return this . policySignature ; }