From bca4c34b3abe2e6cfea72d8589f2501e775e8aab Mon Sep 17 00:00:00 2001
From: Tan Zhen Yong <Xenonym@users.noreply.github.com>
Date: Mon, 7 Oct 2019 17:44:00 +0800
Subject: [PATCH] Add Argon2 hash compare operation

---
 src/core/config/Categories.json       |  1 +
 src/core/operations/Argon2Compare.mjs | 58 +++++++++++++++++++++++++++
 tests/node/tests/operations.mjs       |  7 ++++
 3 files changed, 66 insertions(+)
 create mode 100644 src/core/operations/Argon2Compare.mjs

diff --git a/src/core/config/Categories.json b/src/core/config/Categories.json
index da9e0d0d..fec21d50 100644
--- a/src/core/config/Categories.json
+++ b/src/core/config/Categories.json
@@ -380,6 +380,7 @@
             "Bcrypt parse",
             "Scrypt",
             "Argon2",
+            "Argon2 compare",
             "NT Hash",
             "LM Hash",
             "Fletcher-8 Checksum",
diff --git a/src/core/operations/Argon2Compare.mjs b/src/core/operations/Argon2Compare.mjs
new file mode 100644
index 00000000..01ad9234
--- /dev/null
+++ b/src/core/operations/Argon2Compare.mjs
@@ -0,0 +1,58 @@
+/**
+ * @author Tan Zhen Yong [tzy@beyondthesprawl.com]
+ * @copyright Crown Copyright 2019
+ * @license Apache-2.0
+ */
+
+import Operation from "../Operation.mjs";
+import argon2 from "argon2-browser";
+
+/**
+ * Argon2 compare operation
+ */
+class Argon2Compare extends Operation {
+
+    /**
+     * Argon2Compare constructor
+     */
+    constructor() {
+        super();
+
+        this.name = "Argon2 compare";
+        this.module = "Crypto";
+        this.description = "Tests whether the input matches the given Argon2 hash. To test multiple possible passwords, use the 'Fork' operation.";
+        this.infoURL = "https://wikipedia.org/wiki/Argon2";
+        this.inputType = "string";
+        this.outputType = "string";
+        this.args = [
+            {
+                "name": "Hash",
+                "type": "string",
+                "value": ""
+            }
+        ];
+    }
+
+    /**
+     * @param {string} input
+     * @param {Object[]} args
+     * @returns {string}
+     */
+    async run(input, args) {
+        const encoded = args[0];
+
+        try {
+            await argon2.verify({
+                pass: input,
+                encoded
+            });
+
+            return `Match: ${input}`;
+        } catch (err) {
+            return "No match";
+        }
+    }
+
+}
+
+export default Argon2Compare;
diff --git a/tests/node/tests/operations.mjs b/tests/node/tests/operations.mjs
index 45b38c7e..eaf92804 100644
--- a/tests/node/tests/operations.mjs
+++ b/tests/node/tests/operations.mjs
@@ -138,6 +138,13 @@ Tiger-128`;
         assert.strictEqual(result.toString(), "$argon2i$v=19$m=4096,t=3,p=1$c29tZXNhbHQ$s43my9eBljQADuF/LWCG8vGqwAJzOorKQ0Yog8jFvbw");
     }),
 
+    it("argon2 compare", async () => {
+        const result = await chef.argon2Compare("argon2password", {
+            hash: "$argon2i$v=19$m=4096,t=3,p=1$c29tZXNhbHQ$s43my9eBljQADuF/LWCG8vGqwAJzOorKQ0Yog8jFvbw"
+        });
+        assert.strictEqual(result.toString(), "Match: argon2password");
+    }),
+
     it("Bcrypt", async () => {
         const result = await chef.bcrypt("Put a Sock In It");
         const strResult = result.toString();