* hbytes pkcs5 pn|un VAR BLOCKSIZE => worked? (always 1 for p)
* hbytes blockcipher d|e VAR ALG KEY MODE [IV] => IV
* hbytes blockcipher mac MSG ALG KEY MODE IV => final block
* hbytes pkcs5 pn|un VAR BLOCKSIZE => worked? (always 1 for p)
* hbytes blockcipher d|e VAR ALG KEY MODE [IV] => IV
* hbytes blockcipher mac MSG ALG KEY MODE IV => final block