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Eric Mertens
2025-09-05 22:37:07 -07:00
parent 593a440b84
commit 671aac130f
2 changed files with 17 additions and 5 deletions
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9
Ascon.cry
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@@ -1,6 +1,7 @@
/** Ascon-Based Lightweight Cryptography /** Ascon-Based Lightweight Cryptography
* *
* Author: Eric Mertens * Author: Eric Mertens <emertens@gmail.com>
* License: ISC
* *
* Key algorithms: * Key algorithms:
* - AEAD128_encrypt/decrypt: Authenticated encryption * - AEAD128_encrypt/decrypt: Authenticated encryption
@@ -30,7 +31,7 @@ private
* block is empty (i.e., |𝑋̃ℓ| = 0). * block is empty (i.e., |𝑋̃ℓ| = 0).
*/ */
parse : {r, m} (fin m, fin r, r >= 1) => [m] -> ([m / r][r], [m % r]) parse : {r, m} (fin m, fin r, r >= 1) => [m] -> ([m / r][r], [m % r])
parse (M_ # Ml) = (split M_, Ml) parse (M # Ml) = (split M, Ml)
/** Padding rule. /** Padding rule.
* *
@@ -48,9 +49,7 @@ private
* of integers using Cryptol's native big-endian representation. * of integers using Cryptol's native big-endian representation.
*/ */
toBlocks : {r, m} (r >= 1, fin r, fin m) => [m] -> [m / r + 1][r] toBlocks : {r, m} (r >= 1, fin r, fin m) => [m] -> [m / r + 1][r]
toBlocks M = map reverse (M1 # [pad M2]) toBlocks M = bitsToWords (M # 0b1 # 0)
where
(M1, M2) = parse M
// 3. Ascon Permutations // 3. Ascon Permutations

13
LICENSE Normal file
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@@ -0,0 +1,13 @@
Copyright 2025 Eric Mertens
Permission to use, copy, modify, and/or distribute this software for any
purpose with or without fee is hereby granted, provided that the above
copyright notice and this permission notice appear in all copies.
THE SOFTWARE IS PROVIDED “AS IS” AND THE AUTHOR DISCLAIMS ALL WARRANTIES
WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. *