+ unprepend
+ v hbv
+ length int
+ => hb
+ unappend
+ v hbv
+ length int
+ => hb
+ chopto
+ v hbv
+ length int
+ => hb
+ pkcs5
+ meth enum(PadMethod, "hbytes pad subcommand")
+ v hbv
+ block obj
+ => int
+ blockcipher
+ encrypt charfrom("de","encrypt/decrypt")
+ v hbv
+ alg enum(BlockCipherAlgInfo, "alg")
+ key obj
+ mode enum(BlockCipherModeInfo, "mode")
+ ?iv hb
+ => hb
+ hash
+ alg enum(HashAlgInfo, "hash alg")
+ message hb
+ => hb
+ hmac
+ alg enum(HashAlgInfo, "hash alg for hmac")
+ message hb
+ key obj
+ ?maclen obj
+ => hb
+ zeroes
+ length int