val extend (#l: pnl) (b: Spec.lbytes l) (l': pnl) : Spec.lbytes l'
val extend (#l: pnl) (b: Spec.lbytes l) (l': pnl) : Spec.lbytes l'
let extend (#l:pnl) (b:Spec.lbytes l) (l':pnl)
  : Spec.lbytes l' =
  if l' <= l then Seq.slice b 0 l'
  else Seq.append (Seq.create (l'-l) 0z) b
module Model.QUIC

module HS = FStar.HyperStack
module I = Model.Indexing
module U8 = FStar.UInt8
module U32 = FStar.UInt32
module U64 = FStar.UInt64
module U128 = FStar.UInt128
module M = LowStar.Modifies

friend QUIC.TotSpec

module Spec = QUIC.Spec
module TSpec = QUIC.TotSpec
module QH = QUIC.Spec.Header
module AE = Model.AEAD
module SAE = Spec.Agile.AEAD
module PNE = Model.PNE
module SPNE = Spec.Agile.Cipher
module BF = LowParse.BitFields
module U62 = QUIC.UInt62
module Secret = QUIC.Secret.Int
module B = LowStar.Buffer

open FStar.HyperStack.ST
open FStar.UInt32
open Mem

let pne_plain (j:PNE.id) (l:pnl) : eqtype = Spec.lbytes l & PNE.length_bits l
let as_bytes (j:PNE.id) (l:pnl) (x:pne_plain j l) : GTot (Helpers.lbytes l & PNE.length_bits l) = let (n,b) = x in (Helpers.hide n, b)
let repr (j:PNE.unsafe_id) (l:pnl) (x:pne_plain j l) : b:(Helpers.lbytes l & PNE.length_bits l){b == as_bytes j l x} =
  let (n,b)=x in (Helpers.hide n, b)
let mk (j:PNE.id) (l:pnl) (n:Helpers.lbytes l) (b:PNE.length_bits l) : p:pne_plain j l{as_bytes j l p == (n,b)} = Helpers.reveal n,b
/
Spec.Agile.Cipher.fsti.checked Spec.Agile.AEAD.fsti.checked QUIC.UInt62.fst.checked QUIC.UInt.fst.checked QUIC.TotSpec.fst.checked QUIC.Spec.Lemmas.fst.checked QUIC.Spec.Header.Parse.fsti.checked QUIC.Spec.Header.fsti.checked QUIC.Spec.fsti.checked QUIC.Secret.Int.fsti.checked prims.fst.checked Model.PNE.fsti.checked Model.Indexing.fsti.checked Model.Helpers.fsti.checked Model.AEAD.fsti.checked Mem.fst.checked LowStar.Modifies.fst.checked LowStar.Buffer.fst.checked LowParse.BitFields.fsti.checked Lib.RawIntTypes.fsti.checked FStar.UInt8.fsti.checked FStar.UInt64.fsti.checked FStar.UInt32.fsti.checked FStar.UInt128.fsti.checked FStar.UInt.fsti.checked FStar.Seq.fst.checked FStar.Pervasives.Native.fst.checked FStar.Pervasives.fsti.checked FStar.HyperStack.ST.fsti.checked FStar.HyperStack.fst.checked FStar.Endianness.fsti.checked FStar.Classical.fsti.checked
Model.QUIC.fst
b: QUIC.Spec.Base.lbytes l -> l': Model.QUIC.pnl -> QUIC.Spec.Base.lbytes l'
Model.QUIC.pnl QUIC.Spec.Base.lbytes Prims.op_LessThanOrEqual FStar.Seq.Base.slice QUIC.Spec.Base.byte Prims.bool FStar.Seq.Base.append FStar.Seq.Base.create Prims.op_Subtraction FStar.UInt8.__uint_to_t
let extend (#l: pnl) (b: Spec.lbytes l) (l': pnl) : Spec.lbytes l' =
  
if l' <= l then Seq.slice b 0 l' else Seq.append (Seq.create (l' - l) 0uy) b