blake3-wasm
Version:
BLAKE3 hashing for JavaScript: WebAssembly bindings only
77 lines • 2.01 kB
JavaScript
import { getWasm, HashRaw, inputToArray, WasmHasher, } from '@c4312/blake3-internal';
import { Transform } from 'stream';
class BufferHash extends WasmHasher {
alloc(n) {
return Buffer.allocUnsafe(n);
}
}
/**
* @inheritdoc
*/
export class NodeHash extends Transform {
constructor(wasmModule, hasher) {
super();
this.hash = new BufferHash(wasmModule, hasher);
}
/**
* @reader
*/
reader() {
return this.hash.reader();
}
/**
* @inheritdoc
*/
update(data, encoding) {
this.hash.update(encoding && typeof data === 'string' ? Buffer.from(data, encoding) : inputToArray(data));
return this;
}
/**
* @inheritdoc
*/
dispose() {
this.hash.dispose();
}
digest(encoding, options) {
let resolvedOpts;
let resolvedEnc;
if (encoding && typeof encoding === 'object') {
resolvedOpts = encoding;
resolvedEnc = undefined;
}
else {
resolvedOpts = options;
resolvedEnc = encoding;
}
const result = this.hash.digest(resolvedOpts);
return resolvedEnc ? result.toString(resolvedEnc) : result;
}
/**
* @inheritdoc
* @hidden
*/
_transform(chunk, encoding, callback) {
this.update(chunk, encoding);
callback();
}
/**
* @inheritdoc
* @hidden
*/
_flush(callback) {
callback(null, this.digest());
}
}
/**
* A Node.js crypto-like createHash method.
*/
export const createHash = () => new NodeHash(getWasm(), HashRaw.default());
/**
* Construct a new Hasher for the keyed hash function.
*/
export const createKeyed = (key) => new NodeHash(getWasm(), HashRaw.keyed(inputToArray(key)));
/**
* Construct a new Hasher for the key derivation function.
*/
export const createDeriveKey = (context) => new NodeHash(getWasm(), HashRaw.derive(inputToArray(context)));
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