Operation: Added extract hash feature

src/core/config/Categories.json

@@ -337,6 +337,7 @@
             "Extract domains",
             "Extract file paths",
             "Extract dates",
+            "Extract Hashes",
             "Regular expression",
             "XPath expression",
             "JPath expression",

src/core/operations/ExtractHashes.mjs

@@ -0,0 +1,81 @@
+/**
+ * @author mshwed [m@ttshwed.com]
+ * @copyright Crown Copyright 2019
+ * @license Apache-2.0
+ */
+
+import Operation from "../Operation";
+import { search } from "../lib/Extract";
+
+/**
+ * Extract Hash Values operation
+ */
+class ExtractHashes extends Operation {
+
+    /**
+     * ExtractHashValues constructor
+     */
+    constructor() {
+        super();
+
+        this.name = "Extract Hashes";
+        this.module = "Default";
+        this.description = "Extracts hash values based on hash byte length";
+        this.infoURL = "https://en.wikipedia.org/wiki/Comparison_of_cryptographic_hash_functions";
+        this.inputType = "string";
+        this.outputType = "string";
+        this.args = [
+            {
+                name: "Hash length",
+                type: "number",
+                value: 32
+            },
+            {
+                name: "All hashes",
+                type: "boolean",
+                value: false
+            },
+            {
+                name: "Display Total",
+                type: "boolean",
+                value: false
+            }
+        ];
+    }
+
+    /**
+     * @param {string} input
+     * @param {Object[]} args
+     * @returns {string}
+     */
+    run(input, args) {
+        let results = [];
+        let hashCount = 0;
+
+        const hashLength = args[0];
+        const searchAllHashes = args[1];
+        const showDisplayTotal = args[2];
+
+        let hashLengths = [hashLength];
+        if (searchAllHashes) hashLengths = [4, 8, 16, 32, 64, 128, 160, 192, 224, 256, 320, 384, 512, 1024];
+
+        for (let hashLength of hashLengths) {
+            const regex = new RegExp(`(\\b|^)[a-f0-9]{${hashLength}}(\\b|$)`, "g");
+            const searchResults = search(input, regex, null, false);
+
+            hashCount += searchResults.split("\n").length - 1;
+            results.push(searchResults);
+        }
+
+        let output = "";
+        if (showDisplayTotal) {
+            output = `Total Results: ${hashCount}\n\n`;
+        }
+
+        output = output + results.join("");
+        return output;
+    }
+
+}
+
+export default ExtractHashes;