From 5ac469b17467f8f279d592b34e00dd629227f95e Mon Sep 17 00:00:00 2001
From: Matt <matt+gitkraken@artemisbot.uk>
Date: Tue, 8 Jan 2019 16:19:58 +0000
Subject: [PATCH] Added yara rule support

---
 package-lock.json                 | 151 +++++++++++++++---------------
 package.json                      |   1 +
 src/core/operations/YaraRules.mjs |  68 ++++++++++++++
 3 files changed, 147 insertions(+), 73 deletions(-)
 create mode 100644 src/core/operations/YaraRules.mjs

diff --git a/package-lock.json b/package-lock.json
index 4f1be0a3..f1980a00 100644
--- a/package-lock.json
+++ b/package-lock.json
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-          "resolved": "http://registry.npmjs.org/pify/-/pify-2.3.0.tgz",
+          "resolved": "https://registry.npmjs.org/pify/-/pify-2.3.0.tgz",
           "integrity": "sha1-7RQaasBDqEnqWISY59yosVMw6Qw=",
           "dev": true
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@@ -8437,7 +8442,7 @@
       "dependencies": {
         "async": {
           "version": "1.5.2",
-          "resolved": "http://registry.npmjs.org/async/-/async-1.5.2.tgz",
+          "resolved": "https://registry.npmjs.org/async/-/async-1.5.2.tgz",
           "integrity": "sha1-7GphrlZIDAw8skHJVhjiCJL5Zyo=",
           "dev": true
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@@ -8839,7 +8844,7 @@
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     "progress": {
       "version": "1.1.8",
-      "resolved": "http://registry.npmjs.org/progress/-/progress-1.1.8.tgz",
+      "resolved": "https://registry.npmjs.org/progress/-/progress-1.1.8.tgz",
       "integrity": "sha1-4mDHj2Fhzdmw5WzD4Khd4Xx6V74="
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@@ -8864,13 +8869,13 @@
       "dependencies": {
         "async": {
           "version": "1.0.0",
-          "resolved": "http://registry.npmjs.org/async/-/async-1.0.0.tgz",
+          "resolved": "https://registry.npmjs.org/async/-/async-1.0.0.tgz",
           "integrity": "sha1-+PwEyjoTeErenhZBr5hXjPvWR6k=",
           "dev": true
         },
         "winston": {
           "version": "2.1.1",
-          "resolved": "http://registry.npmjs.org/winston/-/winston-2.1.1.tgz",
+          "resolved": "https://registry.npmjs.org/winston/-/winston-2.1.1.tgz",
           "integrity": "sha1-PJNJ0ZYgf9G9/51LxD73JRDjoS4=",
           "dev": true,
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@@ -8885,7 +8890,7 @@
           "dependencies": {
             "colors": {
               "version": "1.0.3",
-              "resolved": "http://registry.npmjs.org/colors/-/colors-1.0.3.tgz",
+              "resolved": "https://registry.npmjs.org/colors/-/colors-1.0.3.tgz",
               "integrity": "sha1-BDP0TYCWgP3rYO0mDxsMJi6CpAs=",
               "dev": true
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@@ -9064,7 +9069,7 @@
       "dependencies": {
         "pify": {
           "version": "2.3.0",
-          "resolved": "http://registry.npmjs.org/pify/-/pify-2.3.0.tgz",
+          "resolved": "https://registry.npmjs.org/pify/-/pify-2.3.0.tgz",
           "integrity": "sha1-7RQaasBDqEnqWISY59yosVMw6Qw=",
           "dev": true
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@@ -9253,7 +9258,7 @@
       "dependencies": {
         "jsesc": {
           "version": "0.5.0",
-          "resolved": "http://registry.npmjs.org/jsesc/-/jsesc-0.5.0.tgz",
+          "resolved": "https://registry.npmjs.org/jsesc/-/jsesc-0.5.0.tgz",
           "integrity": "sha1-597mbjXW/Bb3EP6R1c9p9w8IkR0=",
           "dev": true
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@@ -9304,7 +9309,7 @@
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         "htmlparser2": {
           "version": "3.3.0",
-          "resolved": "http://registry.npmjs.org/htmlparser2/-/htmlparser2-3.3.0.tgz",
+          "resolved": "https://registry.npmjs.org/htmlparser2/-/htmlparser2-3.3.0.tgz",
           "integrity": "sha1-zHDQWln2VC5D8OaFyYLhTJJKnv4=",
           "dev": true,
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@@ -9316,7 +9321,7 @@
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         "readable-stream": {
           "version": "1.0.34",
-          "resolved": "http://registry.npmjs.org/readable-stream/-/readable-stream-1.0.34.tgz",
+          "resolved": "https://registry.npmjs.org/readable-stream/-/readable-stream-1.0.34.tgz",
           "integrity": "sha1-Elgg40vIQtLyqq+v5MKRbuMsFXw=",
           "dev": true,
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@@ -9426,7 +9431,7 @@
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     "require-uncached": {
       "version": "1.0.3",
-      "resolved": "http://registry.npmjs.org/require-uncached/-/require-uncached-1.0.3.tgz",
+      "resolved": "https://registry.npmjs.org/require-uncached/-/require-uncached-1.0.3.tgz",
       "integrity": "sha1-Tg1W1slmL9MeQwEcS5WqSZVUIdM=",
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@@ -9593,7 +9598,7 @@
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     "safe-regex": {
       "version": "1.1.0",
-      "resolved": "http://registry.npmjs.org/safe-regex/-/safe-regex-1.1.0.tgz",
+      "resolved": "https://registry.npmjs.org/safe-regex/-/safe-regex-1.1.0.tgz",
       "integrity": "sha1-QKNmnzsHfR6UPURinhV91IAjvy4=",
       "dev": true,
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@@ -9914,7 +9919,7 @@
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     "sha.js": {
       "version": "2.4.11",
-      "resolved": "http://registry.npmjs.org/sha.js/-/sha.js-2.4.11.tgz",
+      "resolved": "https://registry.npmjs.org/sha.js/-/sha.js-2.4.11.tgz",
       "integrity": "sha512-QMEp5B7cftE7APOjk5Y6xgrbWu+WkLVQwk8JNjZ8nKRciZaByEW6MubieAiToS7+dwvrjGhH8jRXz3MVd0AYqQ==",
       "dev": true,
       "requires": {
@@ -9958,7 +9963,7 @@
     },
     "shelljs": {
       "version": "0.3.0",
-      "resolved": "http://registry.npmjs.org/shelljs/-/shelljs-0.3.0.tgz",
+      "resolved": "https://registry.npmjs.org/shelljs/-/shelljs-0.3.0.tgz",
       "integrity": "sha1-NZbmMHp4FUT1kfN9phg2DzHbV7E=",
       "dev": true
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@@ -10610,7 +10615,7 @@
     },
     "strip-ansi": {
       "version": "3.0.1",
-      "resolved": "http://registry.npmjs.org/strip-ansi/-/strip-ansi-3.0.1.tgz",
+      "resolved": "https://registry.npmjs.org/strip-ansi/-/strip-ansi-3.0.1.tgz",
       "integrity": "sha1-ajhfuIU9lS1f8F0Oiq+UJ43GPc8=",
       "requires": {
         "ansi-regex": "^2.0.0"
@@ -10627,7 +10632,7 @@
     },
     "strip-eof": {
       "version": "1.0.0",
-      "resolved": "http://registry.npmjs.org/strip-eof/-/strip-eof-1.0.0.tgz",
+      "resolved": "https://registry.npmjs.org/strip-eof/-/strip-eof-1.0.0.tgz",
       "integrity": "sha1-u0P/VZim6wXYm1n80SnJgzE2Br8=",
       "dev": true
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@@ -10706,7 +10711,7 @@
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     "tar": {
       "version": "2.2.1",
-      "resolved": "http://registry.npmjs.org/tar/-/tar-2.2.1.tgz",
+      "resolved": "https://registry.npmjs.org/tar/-/tar-2.2.1.tgz",
       "integrity": "sha1-jk0qJWwOIYXGsYrWlK7JaLg8sdE=",
       "dev": true,
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@@ -10734,7 +10739,7 @@
     },
     "through": {
       "version": "2.3.8",
-      "resolved": "http://registry.npmjs.org/through/-/through-2.3.8.tgz",
+      "resolved": "https://registry.npmjs.org/through/-/through-2.3.8.tgz",
       "integrity": "sha1-DdTJ/6q8NXlgsbckEV1+Doai4fU=",
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@@ -11381,7 +11386,7 @@
       "dependencies": {
         "async": {
           "version": "0.9.2",
-          "resolved": "http://registry.npmjs.org/async/-/async-0.9.2.tgz",
+          "resolved": "https://registry.npmjs.org/async/-/async-0.9.2.tgz",
           "integrity": "sha1-rqdNXmHB+JlhO/ZL2mbUx48v0X0=",
           "dev": true
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@@ -11407,7 +11412,7 @@
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     "valid-data-url": {
       "version": "0.1.6",
-      "resolved": "http://registry.npmjs.org/valid-data-url/-/valid-data-url-0.1.6.tgz",
+      "resolved": "https://registry.npmjs.org/valid-data-url/-/valid-data-url-0.1.6.tgz",
       "integrity": "sha512-FXg2qXMzfAhZc0y2HzELNfUeiOjPr+52hU1DNBWiJJ2luXD+dD1R9NA48Ug5aj0ibbxroeGDc/RJv6ThiGgkDw==",
       "dev": true
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@@ -11423,7 +11428,7 @@
     },
     "validator": {
       "version": "9.4.1",
-      "resolved": "http://registry.npmjs.org/validator/-/validator-9.4.1.tgz",
+      "resolved": "https://registry.npmjs.org/validator/-/validator-9.4.1.tgz",
       "integrity": "sha512-YV5KjzvRmSyJ1ee/Dm5UED0G+1L4GZnLN3w6/T+zZm8scVua4sOhYKWTUrKa0H/tMiJyO9QLHMPN+9mB/aMunA==",
       "dev": true
     },
@@ -11847,7 +11852,7 @@
     },
     "webpack-node-externals": {
       "version": "1.7.2",
-      "resolved": "http://registry.npmjs.org/webpack-node-externals/-/webpack-node-externals-1.7.2.tgz",
+      "resolved": "https://registry.npmjs.org/webpack-node-externals/-/webpack-node-externals-1.7.2.tgz",
       "integrity": "sha512-ajerHZ+BJKeCLviLUUmnyd5B4RavLF76uv3cs6KNuO8W+HuQaEs0y0L7o40NQxdPy5w0pcv8Ew7yPUAQG0UdCg==",
       "dev": true
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@@ -11944,14 +11949,14 @@
       "dependencies": {
         "async": {
           "version": "1.0.0",
-          "resolved": "http://registry.npmjs.org/async/-/async-1.0.0.tgz",
+          "resolved": "https://registry.npmjs.org/async/-/async-1.0.0.tgz",
           "integrity": "sha1-+PwEyjoTeErenhZBr5hXjPvWR6k=",
           "dev": true,
           "optional": true
         },
         "colors": {
           "version": "1.0.3",
-          "resolved": "http://registry.npmjs.org/colors/-/colors-1.0.3.tgz",
+          "resolved": "https://registry.npmjs.org/colors/-/colors-1.0.3.tgz",
           "integrity": "sha1-BDP0TYCWgP3rYO0mDxsMJi6CpAs=",
           "dev": true,
           "optional": true
@@ -11984,7 +11989,7 @@
     },
     "wrap-ansi": {
       "version": "2.1.0",
-      "resolved": "http://registry.npmjs.org/wrap-ansi/-/wrap-ansi-2.1.0.tgz",
+      "resolved": "https://registry.npmjs.org/wrap-ansi/-/wrap-ansi-2.1.0.tgz",
       "integrity": "sha1-2Pw9KE3QV5T+hJc8rs3Rz4JP3YU=",
       "dev": true,
       "requires": {
diff --git a/package.json b/package.json
index 4fac8034..8c0740ca 100644
--- a/package.json
+++ b/package.json
@@ -101,6 +101,7 @@
     "jsonwebtoken": "^8.3.0",
     "jsrsasign": "8.0.12",
     "kbpgp": "^2.0.82",
+    "libyara-wasm": "0.0.2",
     "lodash": "^4.17.11",
     "loglevel": "^1.6.1",
     "loglevel-message-prefix": "^3.0.0",
diff --git a/src/core/operations/YaraRules.mjs b/src/core/operations/YaraRules.mjs
new file mode 100644
index 00000000..9f2d9b79
--- /dev/null
+++ b/src/core/operations/YaraRules.mjs
@@ -0,0 +1,68 @@
+/**
+ * @author Matt C [matt@artemisbot.uk]
+ * @copyright Crown Copyright 2019
+ * @license Apache-2.0
+ */
+
+import Operation from "../Operation";
+import OperationError from "../errors/OperationError";
+import Yara from "libyara-wasm";
+
+/**
+ * Yara Rules operation
+ */
+class YaraRules extends Operation {
+
+    /**
+     * YaraRules constructor
+     */
+    constructor() {
+        super();
+
+        this.name = "Yara Rules";
+        this.module = "Yara";
+        this.description = "Yara support";
+        this.infoURL = "https://en.wikipedia.org/wiki/YARA";
+        this.inputType = "string";
+        this.outputType = "string";
+        this.args = [{
+            name: "Rules",
+            type: "string",
+            value: ""
+        }];
+    }
+
+    /**
+     * @param {string} input
+     * @param {Object[]} args
+     * @returns {string}
+     */
+    run(input, args) {
+        return new Promise((resolve, reject) => {
+            Yara().then(yara => {
+                const resp = yara.run(input, args[0]);
+                if (resp.compileErrors.size() > 0) {
+                    for (let i = 0; i < resp.compileErrors.size(); i++) {
+                        const compileError = resp.compileErrors.get(i);
+                        reject(new OperationError(`Error on line ${compileError.lineNumber}: ${compileError.message}`));
+                    }
+                }
+                const matchedRules = resp.matchedRules;
+                let matchString = "";
+                for (let i = 0; i < matchedRules.keys().size(); i++) {
+                    const ruleMatches = matchedRules.get(matchedRules.keys().get(i));
+                    matchString += `Rule "${matchedRules.keys().get(i)}" matches:\n`;
+
+                    for (let j = 0; j < ruleMatches.size(); j++) {
+                        const match = ruleMatches.get(j);
+                        matchString += `Position ${match.location}, length ${match.matchLength}, data: ${match.data}\n`;
+                    }
+                }
+                resolve(matchString);
+            });
+        });
+    }
+
+}
+
+export default YaraRules;