From 76711c90f25a219adefaff720ccce3df3437a6b2 Mon Sep 17 00:00:00 2001 From: multipleof4 Date: Tue, 10 Mar 2026 21:21:54 -0700 Subject: [PATCH] Feat: Extract SPECK32/64 ECB cipher module --- speck32_64ecb.js | 25 +++++++++++++++++++++++++ 1 file changed, 25 insertions(+) create mode 100644 speck32_64ecb.js diff --git a/speck32_64ecb.js b/speck32_64ecb.js new file mode 100644 index 0000000..0f5989c --- /dev/null +++ b/speck32_64ecb.js @@ -0,0 +1,25 @@ +import speck from 'generic-speck'; +import { blake2bHex } from 'blakejs'; + +const speck32_64 = speck(); + +export function getKey(kStr) { + const key64bit = blake2bHex(kStr, null, 8); + return [ + parseInt(key64bit.slice(0, 4), 16), + parseInt(key64bit.slice(4, 8), 16), + parseInt(key64bit.slice(8, 12), 16), + parseInt(key64bit.slice(12, 16), 16) + ]; +} + +export function encrypt(ptStr, key) { + return Array.from(ptStr, c => speck32_64.encrypt(c.codePointAt(0), key)); +} + +export function decrypt(numArr, key) { + return numArr.map(x => { + try { return String.fromCodePoint(speck32_64.decrypt(x, key)); } + catch { return ''; } + }).join(''); +}