Kbkdf.cr.kb.fits: def of bend-osdev-crypto@0.1.0.0
Import: import bend-osdev-crypto@0.1.0.0/kbkdf.bend as Kbkdf
Lines 94-97 of bend-osdev-crypto@0.1.0.0/kbkdf.bend: https://jend.leeeet.dev/read.txt?path=bend-osdev-crypto@0.1.0.0/kbkdf.bend&start_line=94&end_line=97

import Base

# whether n bytes need at most max blocks of hlen bytes, and L = 8 n fits
# llen bytes (and 32 bits)
def cr.kb.fits(+hlen: Nat, +llen: Nat, +n: Nat, +max: Nat) -> Bool:
  Bool.and(Bool.and(Nat.is_lt(0n, hlen), Nat.is_le(Nat.div(Nat.add(n, Nat.sub(hlen, 1n)), hlen), max)), Nat.is_lt(Nat.mul(8n, n), Nat.pow(2n, Nat.mul(8n, Nat.min(llen, 4n)))))

Uses (11):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Bool
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Bool.and
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Nat
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Nat.add
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Nat.div
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Nat.is_le
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Nat.is_lt
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Nat.min
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Nat.mul
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Nat.pow
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Nat.sub