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delete js implementations

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xhacker-zzz
2023-01-19 20:33:23 +08:00
parent c5b25eb3b5
commit 8475a5bc65
10 changed files with 7 additions and 784 deletions
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73
src/utils/tea.test.ts
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@@ -1,73 +0,0 @@
// Copyright 2021 MengYX. All rights reserved.
//
// Copyright 2015 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in https://go.dev/LICENSE.
import { TeaCipher } from '@/utils/tea';
test('key size', () => {
// prettier-ignore
const testKey = new Uint8Array([
0x00, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77,
0x88, 0x99, 0xaa, 0xbb, 0xcc, 0xdd, 0xee, 0xff,
0x00,
])
expect(() => new TeaCipher(testKey.slice(0, 16))).not.toThrow();
expect(() => new TeaCipher(testKey)).toThrow();
expect(() => new TeaCipher(testKey.slice(0, 15))).toThrow();
});
// prettier-ignore
const teaTests = [
// These were sourced from https://github.com/froydnj/ironclad/blob/master/testing/test-vectors/tea.testvec
{
rounds: TeaCipher.numRounds,
key: new Uint8Array([
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
]),
plainText: new Uint8Array([0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00]),
cipherText: new Uint8Array([0x41, 0xea, 0x3a, 0x0a, 0x94, 0xba, 0xa9, 0x40]),
},
{
rounds: TeaCipher.numRounds,
key: new Uint8Array([
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
]),
plainText: new Uint8Array([0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff]),
cipherText: new Uint8Array([0x31, 0x9b, 0xbe, 0xfb, 0x01, 0x6a, 0xbd, 0xb2]),
},
{
rounds: 16,
key: new Uint8Array([
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
]),
plainText: new Uint8Array([0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00]),
cipherText: new Uint8Array([0xed, 0x28, 0x5d, 0xa1, 0x45, 0x5b, 0x33, 0xc1]),
},
];
test('rounds', () => {
const tt = teaTests[0];
expect(() => new TeaCipher(tt.key, tt.rounds - 1)).toThrow();
});
test('encrypt & decrypt', () => {
for (const tt of teaTests) {
const c = new TeaCipher(tt.key, tt.rounds);
const buf = new Uint8Array(8);
const bufView = new DataView(buf.buffer);
c.encrypt(bufView, new DataView(tt.plainText.buffer));
expect(buf).toStrictEqual(tt.cipherText);
c.decrypt(bufView, new DataView(tt.cipherText.buffer));
expect(buf).toStrictEqual(tt.plainText);
}
});

80
src/utils/tea.ts
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// Copyright 2021 MengYX. All rights reserved.
//
// Copyright 2015 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in https://go.dev/LICENSE.
// TeaCipher is a typescript port to golang.org/x/crypto/tea
// Package tea implements the TEA algorithm, as defined in Needham and
// Wheeler's 1994 technical report, “TEA, a Tiny Encryption Algorithm”. See
// http://www.cix.co.uk/~klockstone/tea.pdf for details.
//
// TEA is a legacy cipher and its short block size makes it vulnerable to
// birthday bound attacks (see https://sweet32.info). It should only be used
// where compatibility with legacy systems, not security, is the goal.
export class TeaCipher {
// BlockSize is the size of a TEA block, in bytes.
static readonly BlockSize = 8;
// KeySize is the size of a TEA key, in bytes.
static readonly KeySize = 16;
// delta is the TEA key schedule constant.
static readonly delta = 0x9e3779b9;
// numRounds 64 is the standard number of rounds in TEA.
static readonly numRounds = 64;
k0: number;
k1: number;
k2: number;
k3: number;
rounds: number;
constructor(key: Uint8Array, rounds: number = TeaCipher.numRounds) {
if (key.length != 16) {
throw Error('incorrect key size');
}
if ((rounds & 1) != 0) {
throw Error('odd number of rounds specified');
}
const k = new DataView(key.buffer);
this.k0 = k.getUint32(0, false);
this.k1 = k.getUint32(4, false);
this.k2 = k.getUint32(8, false);
this.k3 = k.getUint32(12, false);
this.rounds = rounds;
}
encrypt(dst: DataView, src: DataView) {
let v0 = src.getUint32(0, false);
let v1 = src.getUint32(4, false);
let sum = 0;
for (let i = 0; i < this.rounds / 2; i++) {
sum = sum + TeaCipher.delta;
v0 += ((v1 << 4) + this.k0) ^ (v1 + sum) ^ ((v1 >>> 5) + this.k1);
v1 += ((v0 << 4) + this.k2) ^ (v0 + sum) ^ ((v0 >>> 5) + this.k3);
}
dst.setUint32(0, v0, false);
dst.setUint32(4, v1, false);
}
decrypt(dst: DataView, src: DataView) {
let v0 = src.getUint32(0, false);
let v1 = src.getUint32(4, false);
let sum = (TeaCipher.delta * this.rounds) / 2;
for (let i = 0; i < this.rounds / 2; i++) {
v1 -= ((v0 << 4) + this.k2) ^ (v0 + sum) ^ ((v0 >>> 5) + this.k3);
v0 -= ((v1 << 4) + this.k0) ^ (v1 + sum) ^ ((v1 >>> 5) + this.k1);
sum -= TeaCipher.delta;
}
dst.setUint32(0, v0, false);
dst.setUint32(4, v1, false);
}
}