Add JWT Verify, Decode and Sign

src/core/operations/JWTVerify.mjs

@@ -0,0 +1,53 @@
+/**
+ * @author gchq77703 []
+ * @copyright Crown Copyright 2018
+ * @license Apache-2.0
+ */
+
+import Operation from "../Operation";
+import jwt from "jsonwebtoken";
+
+/**
+ * JWT Verify operation
+ */
+class JWTVerify extends Operation {
+
+    /**
+     * JWTVerify constructor
+     */
+    constructor() {
+        super();
+
+        this.name = "JWT Verify";
+        this.module = "Crypto";
+        this.description = "Verifies that a JSON Web Token is valid and has been signed with the provided secret / private key.";
+        this.infoURL = "https://jwt.io/";
+        this.inputType = "string";
+        this.outputType = "JSON";
+        this.args = [
+            {
+                name: "Private / Secret Key",
+                type: "shortString",
+                value: "secret_cat"
+            },
+        ];
+    }
+
+    /**
+     * @param {string} input
+     * @param {Object[]} args
+     * @returns {string}
+     */
+    run(input, args) {
+        const [key] = args;
+
+        try {
+            return jwt.verify(input, key);
+        } catch (err) {
+            return err;
+        }
+    }
+
+}
+
+export default JWTVerify;