Allow to configure custom/prinvate npm registries

README.md

@@ -183,6 +183,30 @@ You can set the minimum package age through multiple sources (in order of priori
    }
    ```
 
+## Custom NPM Registries
+
+Configure Safe Chain to scan packages from custom or private npm registries.
+
+### Configuration Options
+
+You can set custom registries through environment variable or config file. Both sources are merged together.
+
+1. **Environment Variable** (comma-separated):
+
+   ```shell
+   export SAFE_CHAIN_NPM_CUSTOM_REGISTRIES="npm.company.com,registry.internal.net"
+   ```
+
+2. **Config File** (`~/.aikido/config.json`):
+
+   ```json
+   {
+     "npm": {
+       "customRegistries": ["npm.company.com", "registry.internal.net"]
+     }
+   }
+   ```
+
 # Usage in CI/CD
 
 You can protect your CI/CD pipelines from malicious packages by integrating Aikido Safe Chain into your build process. This ensures that any packages installed during your automated builds are checked for malware before installation.

packages/safe-chain/src/config/configFile.js

@@ -7,10 +7,14 @@ import { getEcoSystem } from "./settings.js";
 /**
  * @typedef {Object} SafeChainConfig
  *
- * This should be a number, but can be anything because it is user-input.
+ * We cannot trust the input and should add the necessary validations
+ * @property {unknown | Number} scanTimeout
+ * @property {unknown | Number} minimumPackageAgeHours
+ * @property {unknown | SafeChainRegistryConfiguration} npm
+ *
+ * @typedef {Object} SafeChainRegistryConfiguration
  * We cannot trust the input and should add the necessary validations.
- * @property {unknown} scanTimeout
+ * @property {unknown | string[]} customRegistries
- * @property {unknown} minimumPackageAgeHours
  */
 
 /**
@@ -78,6 +82,30 @@ export function getMinimumPackageAgeHours() {
   return undefined;
 }
 
+/**
+ * Gets the custom npm registries from the config file (format parsing only, no validation)
+ * @returns {string[]}
+ */
+export function getNpmCustomRegistries() {
+  const config = readConfigFile();
+
+  if (!config || !config.npm) {
+    return [];
+  }
+
+  // TypeScript needs help understanding that config.npm exists and has customRegistries
+  const npmConfig = /** @type {SafeChainRegistryConfiguration} */ (config.npm);
+  const customRegistries = npmConfig.customRegistries;
+
+  // Handle format: ensure it's an array of strings
+  if (!Array.isArray(customRegistries)) {
+    return [];
+  }
+
+  // Filter to only string values (format checking, not validation)
+  return customRegistries.filter((item) => typeof item === "string");
+}
+
 /**
  * @param {import("../api/aikido.js").MalwarePackage[]} data
  * @param {string | number} version
@@ -142,6 +170,9 @@ function readConfigFile() {
     return {
       scanTimeout: undefined,
       minimumPackageAgeHours: undefined,
+      npm: {
+        customRegistries: undefined,
+      },
     };
   }
 
@@ -152,6 +183,9 @@ function readConfigFile() {
     return {
       scanTimeout: undefined,
       minimumPackageAgeHours: undefined,
+      npm: {
+        customRegistries: undefined,
+      },
     };
   }
 }

packages/safe-chain/src/config/configFile.spec.js

@@ -231,3 +231,92 @@ describe("getMinimumPackageAgeHours", async () => {
     assert.strictEqual(hours, -48);
   });
 });
+
+describe("getNpmCustomRegistries", async () => {
+  const { getNpmCustomRegistries } = await import("./configFile.js");
+
+  afterEach(() => {
+    configFileContent = undefined;
+  });
+
+  it("should return empty array when config file doesn't exist", () => {
+    configFileContent = undefined;
+
+    const registries = getNpmCustomRegistries();
+
+    assert.deepStrictEqual(registries, []);
+  });
+
+  it("should return empty array when npm config is not set", () => {
+    configFileContent = JSON.stringify({ scanTimeout: 5000 });
+
+    const registries = getNpmCustomRegistries();
+
+    assert.deepStrictEqual(registries, []);
+  });
+
+  it("should return empty array when customRegistries is not an array", () => {
+    configFileContent = JSON.stringify({
+      npm: { customRegistries: "not-an-array" },
+    });
+
+    const registries = getNpmCustomRegistries();
+
+    assert.deepStrictEqual(registries, []);
+  });
+
+  it("should return array of custom registries when set", () => {
+    configFileContent = JSON.stringify({
+      npm: {
+        customRegistries: ["npm.company.com", "registry.internal.net"],
+      },
+    });
+
+    const registries = getNpmCustomRegistries();
+
+    assert.deepStrictEqual(registries, [
+      "npm.company.com",
+      "registry.internal.net",
+    ]);
+  });
+
+  it("should filter out non-string values", () => {
+    configFileContent = JSON.stringify({
+      npm: {
+        customRegistries: [
+          "npm.company.com",
+          123,
+          null,
+          "registry.internal.net",
+          undefined,
+          {},
+        ],
+      },
+    });
+
+    const registries = getNpmCustomRegistries();
+
+    assert.deepStrictEqual(registries, [
+      "npm.company.com",
+      "registry.internal.net",
+    ]);
+  });
+
+  it("should return empty array for empty customRegistries array", () => {
+    configFileContent = JSON.stringify({
+      npm: { customRegistries: [] },
+    });
+
+    const registries = getNpmCustomRegistries();
+
+    assert.deepStrictEqual(registries, []);
+  });
+
+  it("should handle malformed JSON and return empty array", () => {
+    configFileContent = "{ invalid json";
+
+    const registries = getNpmCustomRegistries();
+
+    assert.deepStrictEqual(registries, []);
+  });
+});

packages/safe-chain/src/config/environmentVariables.js

@@ -5,3 +5,13 @@
 export function getMinimumPackageAgeHours() {
   return process.env.SAFE_CHAIN_MINIMUM_PACKAGE_AGE_HOURS;
 }
+
+/**
+ * Gets the custom npm registries from environment variable
+ * Expected format: comma-separated list of registry domains
+ * Example: "npm.company.com,registry.internal.net"
+ * @returns {string | undefined}
+ */
+export function getNpmCustomRegistries() {
+  return process.env.SAFE_CHAIN_NPM_CUSTOM_REGISTRIES;
+}

packages/safe-chain/src/config/settings.js

@@ -98,3 +98,48 @@ export function skipMinimumPackageAge() {
 
   return defaultSkipMinimumPackageAge;
 }
+
+/**
+ * Normalizes a registry URL by removing protocol if present
+ * @param {string} registry
+ * @returns {string}
+ */
+function normalizeRegistry(registry) {
+  // Remove protocol (http://, https://) if present
+  return registry.replace(/^https?:\/\//, "");
+}
+
+/**
+ * Parses comma-separated registries from environment variable
+ * @param {string | undefined} envValue
+ * @returns {string[]}
+ */
+function parseRegistriesFromEnv(envValue) {
+  if (!envValue || typeof envValue !== "string") {
+    return [];
+  }
+
+  // Split by comma and trim whitespace
+  return envValue
+    .split(",")
+    .map((registry) => registry.trim())
+    .filter((registry) => registry.length > 0);
+}
+
+/**
+ * Gets the custom npm registries from both environment variable and config file (merged)
+ * @returns {string[]}
+ */
+export function getNpmCustomRegistries() {
+  const envRegistries = parseRegistriesFromEnv(
+    environmentVariables.getNpmCustomRegistries()
+  );
+  const configRegistries = configFile.getNpmCustomRegistries();
+
+  // Merge both sources and remove duplicates
+  const allRegistries = [...envRegistries, ...configRegistries];
+  const uniqueRegistries = [...new Set(allRegistries)];
+
+  // Normalize each registry (remove protocol if any)
+  return uniqueRegistries.map(normalizeRegistry);
+}

packages/safe-chain/src/config/settings.spec.js

@@ -0,0 +1,249 @@
+import { describe, it, beforeEach, afterEach, mock } from "node:test";
+import assert from "node:assert";
+
+let configFileContent = undefined;
+mock.module("fs", {
+  namedExports: {
+    existsSync: () => configFileContent !== undefined,
+    readFileSync: () => configFileContent,
+    writeFileSync: (content) => (configFileContent = content),
+    mkdirSync: () => {},
+  },
+});
+
+describe("getNpmCustomRegistries", async () => {
+  let originalEnv;
+  const { getNpmCustomRegistries } = await import("./settings.js");
+
+  beforeEach(() => {
+    originalEnv = process.env.SAFE_CHAIN_NPM_CUSTOM_REGISTRIES;
+  });
+
+  afterEach(() => {
+    if (originalEnv !== undefined) {
+      process.env.SAFE_CHAIN_NPM_CUSTOM_REGISTRIES = originalEnv;
+    } else {
+      delete process.env.SAFE_CHAIN_NPM_CUSTOM_REGISTRIES;
+    }
+    configFileContent = undefined;
+  });
+
+  it("should return empty array when no registries configured", () => {
+    configFileContent = undefined;
+
+    const registries = getNpmCustomRegistries();
+
+    assert.deepStrictEqual(registries, []);
+  });
+
+  it("should return registries without protocol", () => {
+    configFileContent = JSON.stringify({
+      npm: {
+        customRegistries: ["npm.company.com", "registry.internal.net"],
+      },
+    });
+
+    const registries = getNpmCustomRegistries();
+
+    assert.deepStrictEqual(registries, [
+      "npm.company.com",
+      "registry.internal.net",
+    ]);
+  });
+
+  it("should strip https:// protocol from registries", () => {
+    configFileContent = JSON.stringify({
+      npm: {
+        customRegistries: [
+          "https://npm.company.com",
+          "https://registry.internal.net",
+        ],
+      },
+    });
+
+    const registries = getNpmCustomRegistries();
+
+    assert.deepStrictEqual(registries, [
+      "npm.company.com",
+      "registry.internal.net",
+    ]);
+  });
+
+  it("should strip http:// protocol from registries", () => {
+    configFileContent = JSON.stringify({
+      npm: {
+        customRegistries: [
+          "http://npm.company.com",
+          "http://registry.internal.net",
+        ],
+      },
+    });
+
+    const registries = getNpmCustomRegistries();
+
+    assert.deepStrictEqual(registries, [
+      "npm.company.com",
+      "registry.internal.net",
+    ]);
+  });
+
+  it("should handle mixed protocols and no protocol", () => {
+    configFileContent = JSON.stringify({
+      npm: {
+        customRegistries: [
+          "https://npm.company.com",
+          "registry.internal.net",
+          "http://private.registry.io",
+        ],
+      },
+    });
+
+    const registries = getNpmCustomRegistries();
+
+    assert.deepStrictEqual(registries, [
+      "npm.company.com",
+      "registry.internal.net",
+      "private.registry.io",
+    ]);
+  });
+
+  it("should preserve registry path after stripping protocol", () => {
+    configFileContent = JSON.stringify({
+      npm: {
+        customRegistries: [
+          "https://npm.company.com/custom/path",
+          "registry.internal.net/npm",
+        ],
+      },
+    });
+
+    const registries = getNpmCustomRegistries();
+
+    assert.deepStrictEqual(registries, [
+      "npm.company.com/custom/path",
+      "registry.internal.net/npm",
+    ]);
+  });
+
+  it("should parse comma-separated registries from environment variable", () => {
+    delete process.env.SAFE_CHAIN_NPM_CUSTOM_REGISTRIES;
+    process.env.SAFE_CHAIN_NPM_CUSTOM_REGISTRIES =
+      "env1.registry.com,env2.registry.net";
+    configFileContent = undefined;
+
+    const registries = getNpmCustomRegistries();
+
+    assert.deepStrictEqual(registries, [
+      "env1.registry.com",
+      "env2.registry.net",
+    ]);
+  });
+
+  it("should trim whitespace from environment variable registries", () => {
+    delete process.env.SAFE_CHAIN_NPM_CUSTOM_REGISTRIES;
+    process.env.SAFE_CHAIN_NPM_CUSTOM_REGISTRIES =
+      "  env1.registry.com  ,  env2.registry.net  ";
+    configFileContent = undefined;
+
+    const registries = getNpmCustomRegistries();
+
+    assert.deepStrictEqual(registries, [
+      "env1.registry.com",
+      "env2.registry.net",
+    ]);
+  });
+
+  it("should merge environment variable and config file registries", () => {
+    delete process.env.SAFE_CHAIN_NPM_CUSTOM_REGISTRIES;
+    process.env.SAFE_CHAIN_NPM_CUSTOM_REGISTRIES = "env1.registry.com";
+    configFileContent = JSON.stringify({
+      npm: {
+        customRegistries: ["config1.registry.net"],
+      },
+    });
+
+    const registries = getNpmCustomRegistries();
+
+    assert.deepStrictEqual(registries, [
+      "env1.registry.com",
+      "config1.registry.net",
+    ]);
+  });
+
+  it("should remove duplicate registries when merging env and config", () => {
+    delete process.env.SAFE_CHAIN_NPM_CUSTOM_REGISTRIES;
+    process.env.SAFE_CHAIN_NPM_CUSTOM_REGISTRIES =
+      "npm.company.com,env.registry.com";
+    configFileContent = JSON.stringify({
+      npm: {
+        customRegistries: ["npm.company.com", "config.registry.net"],
+      },
+    });
+
+    const registries = getNpmCustomRegistries();
+
+    assert.deepStrictEqual(registries, [
+      "npm.company.com",
+      "env.registry.com",
+      "config.registry.net",
+    ]);
+  });
+
+  it("should normalize protocols from environment variable registries", () => {
+    delete process.env.SAFE_CHAIN_NPM_CUSTOM_REGISTRIES;
+    process.env.SAFE_CHAIN_NPM_CUSTOM_REGISTRIES =
+      "https://env1.registry.com,http://env2.registry.net";
+    configFileContent = undefined;
+
+    const registries = getNpmCustomRegistries();
+
+    assert.deepStrictEqual(registries, [
+      "env1.registry.com",
+      "env2.registry.net",
+    ]);
+  });
+
+  it("should handle empty strings in comma-separated list", () => {
+    delete process.env.SAFE_CHAIN_NPM_CUSTOM_REGISTRIES;
+    process.env.SAFE_CHAIN_NPM_CUSTOM_REGISTRIES =
+      "env1.registry.com,,env2.registry.net,";
+    configFileContent = undefined;
+
+    const registries = getNpmCustomRegistries();
+
+    assert.deepStrictEqual(registries, [
+      "env1.registry.com",
+      "env2.registry.net",
+    ]);
+  });
+
+  it("should handle single registry in environment variable", () => {
+    delete process.env.SAFE_CHAIN_NPM_CUSTOM_REGISTRIES;
+    process.env.SAFE_CHAIN_NPM_CUSTOM_REGISTRIES = "single.registry.com";
+    configFileContent = undefined;
+
+    const registries = getNpmCustomRegistries();
+
+    assert.deepStrictEqual(registries, ["single.registry.com"]);
+  });
+
+  it("should return empty array for empty environment variable", () => {
+    delete process.env.SAFE_CHAIN_NPM_CUSTOM_REGISTRIES;
+    process.env.SAFE_CHAIN_NPM_CUSTOM_REGISTRIES = "";
+    configFileContent = undefined;
+
+    const registries = getNpmCustomRegistries();
+
+    assert.deepStrictEqual(registries, []);
+  });
+
+  it("should return empty array for whitespace-only environment variable", () => {
+    delete process.env.SAFE_CHAIN_NPM_CUSTOM_REGISTRIES;
+    process.env.SAFE_CHAIN_NPM_CUSTOM_REGISTRIES = "   ,  ,  ";
+    configFileContent = undefined;
+
+    const registries = getNpmCustomRegistries();
+
+    assert.deepStrictEqual(registries, []);
+  });
+});

packages/safe-chain/src/registryProxy/interceptors/npm/npmInterceptor.js

@@ -1,4 +1,7 @@
-import { skipMinimumPackageAge } from "../../../config/settings.js";
+import {
+  getNpmCustomRegistries,
+  skipMinimumPackageAge,
+} from "../../../config/settings.js";
 import { isMalwarePackage } from "../../../scanning/audit/index.js";
 import { interceptRequests } from "../interceptorBuilder.js";
 import {
@@ -15,7 +18,9 @@ const knownJsRegistries = ["registry.npmjs.org", "registry.yarnpkg.com"];
  * @returns {import("../interceptorBuilder.js").Interceptor | undefined}
  */
 export function npmInterceptorForUrl(url) {
-  const registry = knownJsRegistries.find((reg) => url.includes(reg));
+  const registry = [...knownJsRegistries, ...getNpmCustomRegistries()].find(
+    (reg) => url.includes(reg)
+  );
 
   if (registry) {
     return buildNpmInterceptor(registry);

packages/safe-chain/src/registryProxy/interceptors/npm/npmInterceptor.minPackageAge.spec.js

@@ -9,6 +9,7 @@ describe("npmInterceptor minimum package age", async () => {
     namedExports: {
       getMinimumPackageAgeHours: () => minimumPackageAgeSettings,
       skipMinimumPackageAge: () => skipMinimumPackageAgeSetting,
+      getNpmCustomRegistries: () => [],
     },
   });
 

packages/safe-chain/src/registryProxy/interceptors/npm/npmInterceptor.packageDownload.spec.js

@@ -1,9 +1,9 @@
 import { describe, it, mock } from "node:test";
 import assert from "node:assert";
 
-describe("npmInterceptor", async () => {
 let lastPackage;
 let malwareResponse = false;
+let customRegistries = [];
 
 mock.module("../../../scanning/audit/index.js", {
   namedExports: {
@@ -14,6 +14,23 @@ describe("npmInterceptor", async () => {
   },
 });
 
+mock.module("../../../config/settings.js", {
+  namedExports: {
+    LOGGING_SILENT: "silent",
+    LOGGING_NORMAL: "normal",
+    LOGGING_VERBOSE: "verbose",
+    ECOSYSTEM_JS: "js",
+    ECOSYSTEM_PY: "py",
+    getLoggingLevel: () => "normal",
+    getEcoSystem: () => "js",
+    setEcoSystem: () => {},
+    getMinimumPackageAgeHours: () => 24,
+    getNpmCustomRegistries: () => customRegistries,
+    skipMinimumPackageAge: () => false,
+  },
+});
+
+describe("npmInterceptor", async () => {
   const { npmInterceptorForUrl } = await import("./npmInterceptor.js");
 
   const parserCases = [
@@ -161,3 +178,90 @@ describe("npmInterceptor", async () => {
     );
   });
 });
+
+describe("npmInterceptor with custom registries", async () => {
+  const { npmInterceptorForUrl } = await import("./npmInterceptor.js");
+
+  it("should create interceptor for custom registry", async () => {
+    // Set custom registries for this test
+    customRegistries = ["npm.company.com", "registry.internal.net"];
+    const url = "https://npm.company.com/lodash/-/lodash-4.17.21.tgz";
+
+    const interceptor = npmInterceptorForUrl(url);
+
+    assert.ok(interceptor, "Interceptor should be created for custom registry");
+
+    await interceptor.handleRequest(url);
+
+    assert.deepEqual(lastPackage, {
+      packageName: "lodash",
+      version: "4.17.21",
+    });
+  });
+
+  it("should create interceptor for custom registry with scoped packages", async () => {
+    // Set custom registries for this test
+    customRegistries = ["npm.company.com", "registry.internal.net"];
+    malwareResponse = false;
+
+    const url =
+      "https://registry.internal.net/@company/package/-/package-1.0.0.tgz";
+
+    const interceptor = npmInterceptorForUrl(url);
+
+    assert.ok(
+      interceptor,
+      "Interceptor should be created for custom registry with scoped package"
+    );
+
+    await interceptor.handleRequest(url);
+
+    assert.deepEqual(lastPackage, {
+      packageName: "@company/package",
+      version: "1.0.0",
+    });
+  });
+
+  it("should handle multiple custom registries", async () => {
+    // Set custom registries for this test
+    customRegistries = ["npm.company.com", "registry.internal.net"];
+    malwareResponse = false;
+
+    const url1 = "https://npm.company.com/lodash/-/lodash-4.17.21.tgz";
+    const url2 = "https://registry.internal.net/express/-/express-4.18.2.tgz";
+
+    const interceptor1 = npmInterceptorForUrl(url1);
+    const interceptor2 = npmInterceptorForUrl(url2);
+
+    assert.ok(interceptor1, "Should create interceptor for first registry");
+    assert.ok(interceptor2, "Should create interceptor for second registry");
+
+    await interceptor1.handleRequest(url1);
+    assert.deepEqual(lastPackage, {
+      packageName: "lodash",
+      version: "4.17.21",
+    });
+
+    await interceptor2.handleRequest(url2);
+    assert.deepEqual(lastPackage, {
+      packageName: "express",
+      version: "4.18.2",
+    });
+  });
+
+  it("should not create interceptor for non-custom registry", () => {
+    // Set custom registries for this test
+    customRegistries = ["npm.company.com", "registry.internal.net"];
+    malwareResponse = false;
+
+    const url = "https://unknown.registry.com/package/-/package-1.0.0.tgz";
+
+    const interceptor = npmInterceptorForUrl(url);
+
+    assert.equal(
+      interceptor,
+      undefined,
+      "Should not create interceptor for unknown registry"
+    );
+  });
+});