JS-359 Create rule S6418 (hardcoded-secrets): Hard-coded secrets ar…

…e security-sensitive

its/ruling/src/test/expected/jsts/Ghost/javascript-S6418.json

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+{
+"Ghost:core/client/app/mirage/config.js": [
+59,
+61
+]
+}

its/ruling/src/test/expected/jsts/searchkit/javascript-S6418.json

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+{
+"searchkit:examples/next/components/sdk-example/index.jsx": [
+34
+]
+}

packages/jsts/src/rules/S6418/cb.fixture.ts

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+function func() {
+  const token = 'rf6acB24J//1FZLRrKpjmBUYSnUX5CHlt/iD5vVVcgVuAIOB6hzcWjDnv16V6hDLevW0Qs4hKPbP1M4YfuDI16sZna1/VGRLkAbTk6xMPs4epH6A3ZqSyyI-H92y' // Noncompliant
+//              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+  let api_key = 'not enough entropy'
+  api_key = 'rf6acB24J//1FZLRrKpjmBUYSnUX5CHlt/iD5vVVcgVuAIOB6hzcWjDnv16V6hDLevW0Qs4hKPbP1M4YfuDI16sZna1/VGRLkAbTk6xMPs4epH6A3ZqSyyI-H92y' // Noncompliant
+}
+function entropyTooLow() {
+  const token = 'rf6acB24J//1FZLRrKpjmBUYSnUX5CHlt/iD5vVaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa'
+}
+class MyClass {
+  secret = '1IfHMPanImzX8ZxC-Ud6+YhXiLwlXq$f_-3v~.=' // Noncompliant
+}
+
+function inFunctionCall() {
+  callWithSecret({ secret: '1IfHMPanImzX8ZxC-Ud6+YhXiLwlXq$f_-3v~.=' }) // Noncompliant
+
+  function callWithSecret({}) {}
+}
+function functionWithSecret({ secret = '1IfHMPanImzX8ZxC-Ud6+YhXiLwlXq$f_-3v~.=' }) { // Noncompliant
+//                                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+  }
+function cleanFunction(someArg, parameter='a string', anotherParameter: 42, ...args) {
+  another_call(42, 'a string', parameter, { a_keyword: 42 }, args)
+
+  function another_call(...foo) {}
+}
+
+const someObject = {
+  secret: '1IfHMPanImzX8ZxC-Ud6+YhXiLwlXq$f_-3v~.=', // Noncompliant
+//        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+  not_a_problem: 'not_a_secret',
+  42: 'forty-two'
+}
+
+function multipleAssignment() {
+  let nothing = 1, secret = '1IfHMPanImzX8ZxC-Ud6+YhXiLwlXq$f_-3v.~=', nothing_else = 2; // Noncompliant
+//                          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+}
+function assignmentWithType() {
+  const secret: string = '1IfHMPanImzX8ZxC-Ud6+YhXiLwlXq$f_-3v~.=' // Noncompliant
+  let someVar: string;
+  const anotherVar: number = 42
+}
+
+function defaultValues(foo) {
+  let secret;
+  secret = foo || '1IfHMPanImzX8ZxC-Ud6+YhXiLwlXq$f_-3v~.='; // Noncompliant
+  secret = foo ?? '1IfHMPanImzX8ZxC-Ud6+YhXiLwlXq$f_-3v~.='; // Noncompliant
+}
+
+function customSecretWord() {
+  const yolo = '1IfHMPanImzX8ZxC-Ud6+YhXiLwlXq$f_-3v~.='; // Noncompliant
+}

packages/jsts/src/rules/S6418/cb.options.json

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+[
+  {
+    "secretWords": "api[_.-]?key,auth,credential,secret,token,yolo",
+    "randomnessSensibility": 5.0
+  }
+]

packages/jsts/src/rules/S6418/cb.test.ts

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+/*
+ * SonarQube JavaScript Plugin
+ * Copyright (C) 2011-2024 SonarSource SA
+ * mailto:info AT sonarsource DOT com
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the Sonar Source-Available License Version 1, as published by SonarSource SA.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ * See the Sonar Source-Available License for more details.
+ *
+ * You should have received a copy of the Sonar Source-Available License
+ * along with this program; if not, see https://sonarsource.com/license/ssal/
+ */
+import { check } from '../../../tests/tools/index.js';
+import { rule } from './index.js';
+import path from 'path';
+import { describe } from 'node:test';
+
+const sonarId = path.basename(import.meta.dirname);
+
+describe('Rule S6418', () => {
+  check(sonarId, rule, import.meta.dirname);
+});

packages/jsts/src/rules/S6418/index.ts

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+/*
+ * SonarQube JavaScript Plugin
+ * Copyright (C) 2011-2024 SonarSource SA
+ * mailto:info AT sonarsource DOT com
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the Sonar Source-Available License Version 1, as published by SonarSource SA.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ * See the Sonar Source-Available License for more details.
+ *
+ * You should have received a copy of the Sonar Source-Available License
+ * along with this program; if not, see https://sonarsource.com/license/ssal/
+ */
+export { rule } from './rule.js';

packages/jsts/src/rules/S6418/meta.ts

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+/*
+ * SonarQube JavaScript Plugin
+ * Copyright (C) 2011-2024 SonarSource SA
+ * mailto:info AT sonarsource DOT com
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the Sonar Source-Available License Version 1, as published by SonarSource SA.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ * See the Sonar Source-Available License for more details.
+ *
+ * You should have received a copy of the Sonar Source-Available License
+ * along with this program; if not, see https://sonarsource.com/license/ssal/
+ */
+// DO NOT EDIT! This file is autogenerated by "npm run generate-meta"
+
+export const meta = {
+  type: 'problem',
+  docs: {
+    description: 'Hard-coded secrets are security-sensitive',
+    recommended: true,
+    url: 'https://sonarsource.github.io/rspec/#/rspec/S6418/javascript',
+    requiresTypeChecking: false,
+  },
+};
+
+export const sonarKey = 'S6418';

packages/jsts/src/rules/S6418/rule.ts

@@ -0,0 +1,213 @@
+/*
+ * SonarQube JavaScript Plugin
+ * Copyright (C) 2011-2024 SonarSource SA
+ * mailto:info AT sonarsource DOT com
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the Sonar Source-Available License Version 1, as published by SonarSource SA.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ * See the Sonar Source-Available License for more details.
+ *
+ * You should have received a copy of the Sonar Source-Available License
+ * along with this program; if not, see https://sonarsource.com/license/ssal/
+ */
+// https://sonarsource.github.io/rspec/#/rspec/S6418/javascript
+
+import type { Rule } from 'eslint';
+import {
+  generateMeta,
+  isIdentifier,
+  isLogicalExpression,
+  isStringLiteral,
+} from '../helpers/index.js';
+import { meta } from './meta.js';
+import { JSONSchema4 } from '@typescript-eslint/utils/json-schema';
+import { FromSchema } from 'json-schema-to-ts';
+import { error } from '../../../../shared/src/helpers/logging.js';
+import estree from 'estree';
+import { TSESTree } from '@typescript-eslint/utils';
+
+const DEFAULT_SECRET_WORDS = 'api[_.-]?key,auth,credential,secret,token';
+const DEFAULT_RANDOMNESS_SENSIBILITY = 5.0;
+const POSTVALIDATION_PATTERN =
+  /[a-zA-Z0-9_.+/~$-]([a-zA-Z0-9_.+/=~$-]|\\\\\\\\(?![ntr"])){14,1022}[a-zA-Z0-9_.+/=~$-]/;
+
+function message(name: string): string {
+  return `"${name}" detected here, make sure this is not a hard-coded secret.`;
+}
+
+let randomnessSensibility: number;
+let secretWordRegexps: RegExp[];
+
+const schema = {
+  type: 'array',
+  minItems: 0,
+  maxItems: 1,
+  items: [
+    {
+      type: 'object',
+      properties: {
+        secretWords: {
+          type: 'string',
+        },
+        randomnessSensibility: {
+          type: 'number',
+        },
+      },
+      additionalProperties: false,
+    },
+  ],
+} as const satisfies JSONSchema4;
+
+export const rule: Rule.RuleModule = {
+  meta: generateMeta(
+    meta as Rule.RuleMetaData,
+    { schema },
+    false /* true if secondary locations */,
+  ),
+  create(context: Rule.RuleContext) {
+    // get typed rule options with FromSchema helper
+    const secretWords =
+      (context.options as FromSchema<typeof schema>)[0]?.['secretWords'] ?? DEFAULT_SECRET_WORDS;
+    secretWordRegexps = buildSecretWordRegexps(secretWords);
+    randomnessSensibility =
+      (context.options as FromSchema<typeof schema>)[0]?.['randomnessSensibility'] ??
+      DEFAULT_RANDOMNESS_SENSIBILITY;
+
+    return {
+      AssignmentExpression(node) {
+        handleAssignmentExpression(context, node);
+      },
+      AssignmentPattern(node) {
+        handleAssignmentPattern(context, node);
+      },
+      Property(node) {
+        handlePropertyAndPropertyDefinition(context, node);
+      },
+      PropertyDefinition(node) {
+        handlePropertyAndPropertyDefinition(context, node);
+      },
+      VariableDeclarator(node) {
+        handleVariableDeclarator(context, node);
+      },
+    };
+  },
+};
+
+function handleAssignmentExpression(context: Rule.RuleContext, node: estree.AssignmentExpression) {
+  const keySuspect = findKeySuspect(node.left);
+  const valueSuspect = findValueSuspect(extractDefaultOperatorIfNeeded(node));
+  if (keySuspect && valueSuspect) {
+    context.report({
+      node: node.right,
+      message: message(keySuspect),
+    });
+  }
+  function extractDefaultOperatorIfNeeded(node: estree.AssignmentExpression): estree.Node {
+    const defaultOperators = ['??', '||'];
+    if (
+      isLogicalExpression(node.right as TSESTree.Node) &&
+      defaultOperators.includes((node.right as estree.LogicalExpression).operator)
+    ) {
+      return (node.right as estree.LogicalExpression).right;
+    } else {
+      return node.right;
+    }
+  }
+}
+function handleAssignmentPattern(context: Rule.RuleContext, node: estree.AssignmentPattern) {
+  const keySuspect = findKeySuspect(node.left);
+  const valueSuspect = findValueSuspect(node.right);
+  if (keySuspect && valueSuspect) {
+    context.report({
+      node: node.right,
+      message: message(keySuspect),
+    });
+  }
+}
+function handlePropertyAndPropertyDefinition(
+  context: Rule.RuleContext,
+  node: estree.Property | estree.PropertyDefinition,
+) {
+  const keySuspect = findKeySuspect(node.key);
+  const valueSuspect = findValueSuspect(node.value);
+  if (keySuspect && valueSuspect) {
+    context.report({
+      node: node.value as estree.Literal,
+      message: message(keySuspect),
+    });
+  }
+}
+function handleVariableDeclarator(context: Rule.RuleContext, node: estree.VariableDeclarator) {
+  const keySuspect = findKeySuspect(node.id);
+  const valueSuspect = findValueSuspect(node.init);
+  if (keySuspect && valueSuspect) {
+    context.report({
+      node: node.init as estree.Literal,
+      message: message(keySuspect),
+    });
+  }
+}
+
+function findKeySuspect(node: estree.Node): string | undefined {
+  if (isIdentifier(node) && secretWordRegexps.some(pattern => pattern.test(node.name))) {
+    return node.name;
+  } else {
+    return undefined;
+  }
+}
+
+function findValueSuspect(node: estree.Node | undefined | null): estree.Node | undefined {
+  if (
+    node &&
+    isStringLiteral(node) &&
+    valuePassesPostValidation(node.value) &&
+    entropyShouldRaise(node.value)
+  ) {
+    return node;
+  } else {
+    return undefined;
+  }
+}
+
+function valuePassesPostValidation(value: string): boolean {
+  return POSTVALIDATION_PATTERN.test(value);
+}
+
+function buildSecretWordRegexps(secretWords: string) {
+  try {
+    return secretWords.split(',').map(word => new RegExp(`(${word})`, 'i'));
+  } catch (e) {
+    error(
+      `Invalid characters provided to rule S6418 'hardcoded-secrets' parameter "secretWords": "${secretWords}" falling back to default: "${DEFAULT_SECRET_WORDS}". Error: ${e}`,
+    );
+    return buildSecretWordRegexps(DEFAULT_SECRET_WORDS);
+  }
+}
+
+function entropyShouldRaise(value: string): boolean {
+  return ShannonEntropy.calculate(value) > randomnessSensibility;
+}
+
+const ShannonEntropy = {
+  calculate: (str: string): number => {
+    if (!str) {
+      return 0;
+    }
+    const lettersTotal = str.length;
+    const occurences: Record<string, number> = {};
+    for (const letter of [...str]) {
+      occurences[letter] = (occurences[letter] ?? 0) + 1;
+    }
+    const values = Object.values(occurences);
+    return (
+      values
+        .map(count => count / lettersTotal)
+        .map(frequency => -frequency * Math.log(frequency))
+        .reduce((acc, entropy) => acc + entropy, 0) / Math.log(2)
+    );
+  },
+};