ESM: Ported all Hash and Checksum operations

src/core/operations/Shake.mjs

@@ -0,0 +1,70 @@
+/**
+ * @author n1474335 [n1474335@gmail.com]
+ * @copyright Crown Copyright 2016
+ * @license Apache-2.0
+ */
+
+import Operation from "../Operation";
+import OperationError from "../errors/OperationError";
+import JSSHA3 from "js-sha3";
+
+/**
+ * Shake operation
+ */
+class Shake extends Operation {
+
+    /**
+     * Shake constructor
+     */
+    constructor() {
+        super();
+
+        this.name = "Shake";
+        this.module = "Hashing";
+        this.description = "Shake is an Extendable Output Function (XOF) of the SHA-3 hash algorithm, part of the Keccak family, allowing for variable output length/size.";
+        this.inputType = "ArrayBuffer";
+        this.outputType = "string";
+        this.args = [
+            {
+                "name": "Capacity",
+                "type": "option",
+                "value": ["256", "128"]
+            },
+            {
+                "name": "Size",
+                "type": "number",
+                "value": 512
+            }
+        ];
+    }
+
+    /**
+     * @param {ArrayBuffer} input
+     * @param {Object[]} args
+     * @returns {string}
+     */
+    run(input, args) {
+        const capacity = parseInt(args[0], 10),
+            size = args[1];
+        let algo;
+
+        if (size < 0)
+            throw new OperationError("Size must be greater than 0");
+
+        switch (capacity) {
+            case 128:
+                algo = JSSHA3.shake128;
+                break;
+            case 256:
+                algo = JSSHA3.shake256;
+                break;
+            default:
+                throw new OperationError("Invalid size");
+        }
+
+        return algo(input, size);
+    }
+
+}
+
+export default Shake;