public void keygen(String pubfile, String prvfile, String mskfile, String attr_str)
throws NoSuchAlgorithmException, IOException {
BswabePub pub;
BswabeMsk msk;
byte[] pub_byte, msk_byte, prv_byte;
/* get BswabePub from pubfile */
pub_byte = Common.suckFile(pubfile);
pub = new BswabePub();
pub.initFromBuffer(pub_byte);
/* get BswabeMsk from mskfile */
msk_byte = Common.suckFile(mskfile);
msk = new BswabeMsk(pub);
msk.initFromBuffer(msk_byte);
String[] attr_arr = LangPolicy.parseAttribute(attr_str);
BswabePrv prv = Bswabe.keygen(pub, msk, attr_arr);
/* store BswabePrv into prvfile */
prv_byte = prv.serialize();
Common.spitFile(prvfile, prv_byte);
}
