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Просмотр файла: blake2s.ts
/**
* Blake2s hash function. Focuses on 8-bit to 32-bit platforms. blake2b for 64-bit, but in JS it is slower.
* @module
*/
import { BLAKE, type BlakeOpts, SIGMA } from './_blake.js';
import { fromBig } from './_u64.js';
import { byteSwapIfBE, type CHashO, rotr, toBytes, u32, wrapConstructorWithOpts } from './utils.js';
/**
* Initial state: same as SHA256. First 32 bits of the fractional parts of the square roots
* of the first 8 primes 2..19.
*/
// prettier-ignore
export const B2S_IV: Uint32Array = /* @__PURE__ */ new Uint32Array([
0x6a09e667, 0xbb67ae85, 0x3c6ef372, 0xa54ff53a, 0x510e527f, 0x9b05688c, 0x1f83d9ab, 0x5be0cd19
]);
// prettier-ignore
type Num4 = { a: number; b: number; c: number; d: number; };
// prettier-ignore
type Num16 = {
v0: number; v1: number; v2: number; v3: number;
v4: number; v5: number; v6: number; v7: number;
v8: number; v9: number; v10: number; v11: number;
v12: number; v13: number; v14: number; v15: number;
};
// Mixing function G splitted in two halfs
export function G1s(a: number, b: number, c: number, d: number, x: number): Num4 {
a = (a + b + x) | 0;
d = rotr(d ^ a, 16);
c = (c + d) | 0;
b = rotr(b ^ c, 12);
return { a, b, c, d };
}
export function G2s(a: number, b: number, c: number, d: number, x: number): Num4 {
a = (a + b + x) | 0;
d = rotr(d ^ a, 8);
c = (c + d) | 0;
b = rotr(b ^ c, 7);
return { a, b, c, d };
}
// prettier-ignore
export function compress(s: Uint8Array, offset: number, msg: Uint32Array, rounds: number,
v0: number, v1: number, v2: number, v3: number, v4: number, v5: number, v6: number, v7: number,
v8: number, v9: number, v10: number, v11: number, v12: number, v13: number, v14: number, v15: number,
): Num16 {
let j = 0;
for (let i = 0; i < rounds; i++) {
({ a: v0, b: v4, c: v8, d: v12 } = G1s(v0, v4, v8, v12, msg[offset + s[j++]]));
({ a: v0, b: v4, c: v8, d: v12 } = G2s(v0, v4, v8, v12, msg[offset + s[j++]]));
({ a: v1, b: v5, c: v9, d: v13 } = G1s(v1, v5, v9, v13, msg[offset + s[j++]]));
({ a: v1, b: v5, c: v9, d: v13 } = G2s(v1, v5, v9, v13, msg[offset + s[j++]]));
({ a: v2, b: v6, c: v10, d: v14 } = G1s(v2, v6, v10, v14, msg[offset + s[j++]]));
({ a: v2, b: v6, c: v10, d: v14 } = G2s(v2, v6, v10, v14, msg[offset + s[j++]]));
({ a: v3, b: v7, c: v11, d: v15 } = G1s(v3, v7, v11, v15, msg[offset + s[j++]]));
({ a: v3, b: v7, c: v11, d: v15 } = G2s(v3, v7, v11, v15, msg[offset + s[j++]]));
({ a: v0, b: v5, c: v10, d: v15 } = G1s(v0, v5, v10, v15, msg[offset + s[j++]]));
({ a: v0, b: v5, c: v10, d: v15 } = G2s(v0, v5, v10, v15, msg[offset + s[j++]]));
({ a: v1, b: v6, c: v11, d: v12 } = G1s(v1, v6, v11, v12, msg[offset + s[j++]]));
({ a: v1, b: v6, c: v11, d: v12 } = G2s(v1, v6, v11, v12, msg[offset + s[j++]]));
({ a: v2, b: v7, c: v8, d: v13 } = G1s(v2, v7, v8, v13, msg[offset + s[j++]]));
({ a: v2, b: v7, c: v8, d: v13 } = G2s(v2, v7, v8, v13, msg[offset + s[j++]]));
({ a: v3, b: v4, c: v9, d: v14 } = G1s(v3, v4, v9, v14, msg[offset + s[j++]]));
({ a: v3, b: v4, c: v9, d: v14 } = G2s(v3, v4, v9, v14, msg[offset + s[j++]]));
}
return { v0, v1, v2, v3, v4, v5, v6, v7, v8, v9, v10, v11, v12, v13, v14, v15 };
}
export class BLAKE2s extends BLAKE<BLAKE2s> {
// Internal state, same as SHA-256
private v0 = B2S_IV[0] | 0;
private v1 = B2S_IV[1] | 0;
private v2 = B2S_IV[2] | 0;
private v3 = B2S_IV[3] | 0;
private v4 = B2S_IV[4] | 0;
private v5 = B2S_IV[5] | 0;
private v6 = B2S_IV[6] | 0;
private v7 = B2S_IV[7] | 0;
constructor(opts: BlakeOpts = {}) {
super(64, opts.dkLen === undefined ? 32 : opts.dkLen, opts, 32, 8, 8);
const keyLength = opts.key ? opts.key.length : 0;
this.v0 ^= this.outputLen | (keyLength << 8) | (0x01 << 16) | (0x01 << 24);
if (opts.salt) {
const salt = u32(toBytes(opts.salt));
this.v4 ^= byteSwapIfBE(salt[0]);
this.v5 ^= byteSwapIfBE(salt[1]);
}
if (opts.personalization) {
const pers = u32(toBytes(opts.personalization));
this.v6 ^= byteSwapIfBE(pers[0]);
this.v7 ^= byteSwapIfBE(pers[1]);
}
if (opts.key) {
// Pad to blockLen and update
const tmp = new Uint8Array(this.blockLen);
tmp.set(toBytes(opts.key));
this.update(tmp);
}
}
protected get(): [number, number, number, number, number, number, number, number] {
const { v0, v1, v2, v3, v4, v5, v6, v7 } = this;
return [v0, v1, v2, v3, v4, v5, v6, v7];
}
// prettier-ignore
protected set(
v0: number, v1: number, v2: number, v3: number, v4: number, v5: number, v6: number, v7: number
): void {
this.v0 = v0 | 0;
this.v1 = v1 | 0;
this.v2 = v2 | 0;
this.v3 = v3 | 0;
this.v4 = v4 | 0;
this.v5 = v5 | 0;
this.v6 = v6 | 0;
this.v7 = v7 | 0;
}
protected compress(msg: Uint32Array, offset: number, isLast: boolean): void {
const { h, l } = fromBig(BigInt(this.length));
// prettier-ignore
const { v0, v1, v2, v3, v4, v5, v6, v7, v8, v9, v10, v11, v12, v13, v14, v15 } =
compress(
SIGMA, offset, msg, 10,
this.v0, this.v1, this.v2, this.v3, this.v4, this.v5, this.v6, this.v7,
B2S_IV[0], B2S_IV[1], B2S_IV[2], B2S_IV[3], l ^ B2S_IV[4], h ^ B2S_IV[5], isLast ? ~B2S_IV[6] : B2S_IV[6], B2S_IV[7]
);
this.v0 ^= v0 ^ v8;
this.v1 ^= v1 ^ v9;
this.v2 ^= v2 ^ v10;
this.v3 ^= v3 ^ v11;
this.v4 ^= v4 ^ v12;
this.v5 ^= v5 ^ v13;
this.v6 ^= v6 ^ v14;
this.v7 ^= v7 ^ v15;
}
destroy(): void {
this.destroyed = true;
this.buffer32.fill(0);
this.set(0, 0, 0, 0, 0, 0, 0, 0);
}
}
/**
* Blake2s hash function. Focuses on 8-bit to 32-bit platforms. blake2b for 64-bit, but in JS it is slower.
* @param msg - message that would be hashed
* @param opts - dkLen output length, key for MAC mode, salt, personalization
*/
export const blake2s: CHashO = /* @__PURE__ */ wrapConstructorWithOpts<BLAKE2s, BlakeOpts>(
(opts) => new BLAKE2s(opts)
);
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