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Delete: Remove speck48_96ctr.js in favor of TS

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multipleof4
2026-08-25 07:55:10 -07:00
parent c00e8ac207
commit fdd9d998a5
1 changed files with 0 additions and 44 deletions
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speck48_96ctr.js
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@@ -1,44 +0,0 @@
import speck from 'generic-speck';
import { blake2bHex } from 'blakejs';
const speck48_96 = speck({ bits: 24, rounds: 23, rightRotations: 8, leftRotations: 3 });
export function getKey(kStr) {
const key96bit = blake2bHex(kStr, null, 12);
return[
parseInt(key96bit.slice(0, 6), 16),
parseInt(key96bit.slice(6, 12), 16),
parseInt(key96bit.slice(12, 18), 16),
parseInt(key96bit.slice(18, 24), 16)
];
}
export function encrypt(ptStr, key) {
// Generate a cryptographically secure random 24-bit nonce
const nonce = globalThis.crypto.getRandomValues(new Uint32Array(1))[0] & 0xFFFFFF;
const ctArr = Array.from(ptStr, (c, i) => {
const ctrBlock = nonce * 16777216 + (i & 0xFFFFFF);
const ks = speck48_96.encrypt(ctrBlock, key);
return (c.codePointAt(0) ^ ks) >>> 0;
});
// Prepend the nonce to the ciphertext array
return [nonce, ...ctArr];
}
export function decrypt(numArr, key) {
if (!numArr || numArr.length === 0) return '';
// Extract the nonce from the first element
const nonce = numArr[0];
const ctArr = numArr.slice(1);
return ctArr.map((ct, i) => {
const ctrBlock = nonce * 16777216 + (i & 0xFFFFFF);
const ks = speck48_96.encrypt(ctrBlock, key);
const cp = (ct ^ ks) >>> 0;
try { return String.fromCodePoint(cp); }
catch { return ''; }
}).join('');
}