ESM: Ported all Hash and Checksum operations

src/core/operations/Keccak.mjs

@@ -0,0 +1,67 @@
+/**
+ * @author n1474335 [n1474335@gmail.com]
+ * @copyright Crown Copyright 2016
+ * @license Apache-2.0
+ */
+
+import Operation from "../Operation";
+import JSSHA3 from "js-sha3";
+import OperationError from "../errors/OperationError";
+
+/**
+ * Keccak operation
+ */
+class Keccak extends Operation {
+
+    /**
+     * Keccak constructor
+     */
+    constructor() {
+        super();
+
+        this.name = "Keccak";
+        this.module = "Hashing";
+        this.description = "The Keccak hash algorithm was designed by Guido Bertoni, Joan Daemen, Micha\xebl Peeters, and Gilles Van Assche, building upon RadioGat\xfan. It was selected as the winner of the SHA-3 design competition.<br><br>This version of the algorithm is Keccak[c=2d] and differs from the SHA-3 specification.";
+        this.inputType = "ArrayBuffer";
+        this.outputType = "string";
+        this.args = [
+            {
+                "name": "Size",
+                "type": "option",
+                "value": ["512", "384", "256", "224"]
+            }
+        ];
+    }
+
+    /**
+     * @param {ArrayBuffer} input
+     * @param {Object[]} args
+     * @returns {string}
+     */
+    run(input, args) {
+        const size = parseInt(args[0], 10);
+        let algo;
+
+        switch (size) {
+            case 224:
+                algo = JSSHA3.keccak224;
+                break;
+            case 384:
+                algo = JSSHA3.keccak384;
+                break;
+            case 256:
+                algo = JSSHA3.keccak256;
+                break;
+            case 512:
+                algo = JSSHA3.keccak512;
+                break;
+            default:
+                throw new OperationError("Invalid size");
+        }
+
+        return algo(input);
+    }
+
+}
+
+export default Keccak;