Added CRC64 hash class

.eslintrc.yaml

@@ -2,7 +2,7 @@ plugins:
   - eslint-plugin-import
 
 parserOptions:
-  ecmaVersion: 13
+  ecmaVersion: latest
   sourceType: module
 
 extends:
@@ -14,6 +14,7 @@ env:
   es6: true
   commonjs: true
   node: true
+  es2020: true
 
 rules:
   # Possible Errors:

util/hash.mjs

@@ -5,11 +5,25 @@ import {createHash} from 'node:crypto';
 import {Transform, Writable} from 'node:stream';
 import {pipeline} from 'node:stream/promises';
 
+import {Crc64} from './crc64.mjs';
+
+function hasher(algo) {
+	switch (algo) {
+		case 'crc64': {
+			return new Crc64();
+		}
+		default: {
+			// Do nothing.
+		}
+	}
+	return createHash(algo);
+}
+
 export class HashWritable extends Writable {
 	constructor(algos) {
 		super();
 
-		this._hashers = algos.map(algo => createHash(algo));
+		this._hashers = algos.map(hasher);
 	}
 
 	digests(encoding = null) {
@@ -21,7 +35,7 @@ export class HashWritable extends Writable {
 
 	_write(chunk, encoding, callback) {
 		for (const hasher of this._hashers) {
-			hasher.update(chunk, encoding);
+			hasher.update(Buffer.from(chunk, encoding));
 		}
 		callback();
 	}
@@ -31,7 +45,7 @@ export class HashTransform extends Transform {
 	constructor(algos) {
 		super();
 
-		this._hashers = algos.map(algo => createHash(algo));
+		this._hashers = algos.map(hasher);
 	}
 
 	digests(encoding = null) {
@@ -43,7 +57,7 @@ export class HashTransform extends Transform {
 
 	_transform(chunk, encoding, callback) {
 		for (const hasher of this._hashers) {
-			hasher.update(chunk, encoding);
+			hasher.update(Buffer.from(chunk, encoding));
 		}
 		this.push(chunk, encoding);
 		callback();