Skip to content

chore: Switch to module system #30

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
samuelburnham merged 2 commits into from
Feb 25, 2026
Merged

chore: Switch to module system #30

Changes from all commits
Commits
Show all changes
2 commits
Select commit Hold shift + click to select a range
021cbc6
chore: Switch to module system
samuelburnham Feb 24, 2026
a323576
Remove unnecessary `@[expose]`
samuelburnham Feb 25, 2026
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
7 changes: 6 additions & 1 deletion Blake3.lean
View file
Open in desktop
Original file line number Diff line number Diff line change
@@ -1,19 +1,23 @@
module
/-! Bindings to the BLAKE3 hashing library. -/

theorem ByteArray.size_of_extract {hash : ByteArray} (h : e ≤ hash.size) :
(hash.extract b e).size = e - b := by
simp [Nat.min_eq_left h]

namespace Blake3
public section

/-- BLAKE3 constants -/
abbrev BLAKE3_OUT_LEN : Nat := 32
abbrev BLAKE3_KEY_LEN : Nat := 32

/-- A wrapper around `ByteArray` whose size is `BLAKE3_OUT_LEN` -/
@[expose]
def Blake3Hash : Type := { r : ByteArray // r.size = BLAKE3_OUT_LEN }

/-- A wrapper around `ByteArray` whose size is `BLAKE3_KEY_LEN` -/
@[expose]
def Blake3Key : Type := { r : ByteArray // r.size = BLAKE3_KEY_LEN }

def Blake3Key.ofBytes (bytes : ByteArray)
Expand Down Expand Up @@ -107,7 +111,7 @@ namespace Sponge
abbrev ABSORB_MAX_BYTES := UInt32.size - 1
abbrev DEFAULT_REKEYING_STAGE := UInt16.size - 1

def init (label : String) (_h : ¬label.isEmpty := by decide) : Sponge :=
def init (label : String) (_h : ¬label.isEmpty := by native_decide) : Sponge :=
⟨Hasher.initDeriveKey label.toUTF8, 0⟩

def ratchet (sponge : Sponge) : Sponge :=
Expand Down Expand Up @@ -149,4 +153,5 @@ def squeeze (sponge : Sponge) (length : USize)

end Sponge

end
end Blake3