grpc-js: add ServerCredentials support

This commit adds ServerCredentials to the pure JS implementation.

packages/grpc-js/src/index.ts

@@ -27,6 +27,7 @@ import {LogVerbosity, Status} from './constants';
 import * as logging from './logging';
 import {Deserialize, loadPackageDefinition, makeClientConstructor, Serialize} from './make-client';
 import {Metadata} from './metadata';
+import {KeyCertPair, ServerCredentials} from './server-credentials';
 import {StatusBuilder} from './status-builder';
 
 const supportedNodeVersions = '^8.11.2 || >=9.4';
@@ -226,15 +227,9 @@ export const Server = (options: any) => {
   throw new Error('Not yet implemented');
 };
 
-export const ServerCredentials = {
-  createSsl:
-      (rootCerts: any, keyCertPairs: any, checkClientCertificate: any) => {
-        throw new Error('Not yet implemented');
-      },
-  createInsecure: () => {
-    throw new Error('Not yet implemented');
-  }
-};
+export {ServerCredentials};
+export {KeyCertPair};
+
 
 export const getClientChannel = (client: Client) => {
   return Client.prototype.getChannel.call(client);

packages/grpc-js/src/server-credentials.ts

@@ -0,0 +1,108 @@
+/*
+ * Copyright 2019 gRPC authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
+import {SecureServerOptions} from 'http2';
+
+
+export type KeyCertPair = {
+  private_key: Buffer,
+  cert_chain: Buffer
+};
+
+
+export abstract class ServerCredentials {
+  abstract _isSecure(): boolean;
+  abstract _getSettings(): SecureServerOptions|null;
+
+  static createInsecure(): ServerCredentials {
+    return new InsecureServerCredentials();
+  }
+
+  static createSsl(
+      rootCerts: Buffer|null, keyCertPairs: KeyCertPair[],
+      checkClientCertificate = false): ServerCredentials {
+    if (rootCerts !== null && !Buffer.isBuffer(rootCerts)) {
+      throw new TypeError('rootCerts must be null or a Buffer');
+    }
+
+    if (!Array.isArray(keyCertPairs)) {
+      throw new TypeError('keyCertPairs must be an array');
+    }
+
+    if (typeof checkClientCertificate !== 'boolean') {
+      throw new TypeError('checkClientCertificate must be a boolean');
+    }
+
+    const cert = [];
+    const key = [];
+
+    for (let i = 0; i < keyCertPairs.length; i++) {
+      const pair = keyCertPairs[i];
+
+      if (pair === null || typeof pair !== 'object') {
+        throw new TypeError(`keyCertPair[${i}] must be an object`);
+      }
+
+      if (!Buffer.isBuffer(pair.private_key)) {
+        throw new TypeError(`keyCertPair[${i}].private_key must be a Buffer`);
+      }
+
+      if (!Buffer.isBuffer(pair.cert_chain)) {
+        throw new TypeError(`keyCertPair[${i}].cert_chain must be a Buffer`);
+      }
+
+      cert.push(pair.cert_chain);
+      key.push(pair.private_key);
+    }
+
+    return new SecureServerCredentials({
+      ca: rootCerts || undefined,
+      cert,
+      key,
+      requestCert: checkClientCertificate
+    });
+  }
+}
+
+
+class InsecureServerCredentials extends ServerCredentials {
+  _isSecure(): boolean {
+    return false;
+  }
+
+  _getSettings(): null {
+    return null;
+  }
+}
+
+
+class SecureServerCredentials extends ServerCredentials {
+  private options: SecureServerOptions;
+
+  constructor(options: SecureServerOptions) {
+    super();
+    this.options = options;
+  }
+
+  _isSecure(): boolean {
+    return true;
+  }
+
+  _getSettings(): SecureServerOptions {
+    return this.options;
+  }
+}

packages/grpc-js/test/test-server-credentials.ts

@@ -0,0 +1,126 @@
+/*
+ * Copyright 2019 gRPC authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
+// Allow `any` data type for testing runtime type checking.
+// tslint:disable no-any
+import * as assert from 'assert';
+import {readFileSync} from 'fs';
+import {join} from 'path';
+import {ServerCredentials} from '../src';
+
+const ca = readFileSync(join(__dirname, 'fixtures', 'ca.pem'));
+const key = readFileSync(join(__dirname, 'fixtures', 'server1.key'));
+const cert = readFileSync(join(__dirname, 'fixtures', 'server1.pem'));
+
+describe('Server Credentials', () => {
+  describe('createInsecure', () => {
+    it('creates insecure credentials', () => {
+      const creds = ServerCredentials.createInsecure();
+
+      assert.strictEqual(creds._isSecure(), false);
+      assert.strictEqual(creds._getSettings(), null);
+    });
+  });
+
+  describe('createSsl', () => {
+    it('accepts a buffer and array as the first two arguments', () => {
+      const creds = ServerCredentials.createSsl(ca, []);
+
+      assert.strictEqual(creds._isSecure(), true);
+      assert.deepStrictEqual(
+          creds._getSettings(), {ca, cert: [], key: [], requestCert: false});
+    });
+
+    it('accepts a boolean as the third argument', () => {
+      const creds = ServerCredentials.createSsl(ca, [], true);
+
+      assert.strictEqual(creds._isSecure(), true);
+      assert.deepStrictEqual(
+          creds._getSettings(), {ca, cert: [], key: [], requestCert: true});
+    });
+
+    it('accepts an object with two buffers in the second argument', () => {
+      const keyCertPairs = [{private_key: key, cert_chain: cert}];
+      const creds = ServerCredentials.createSsl(null, keyCertPairs);
+
+      assert.strictEqual(creds._isSecure(), true);
+      assert.deepStrictEqual(
+          creds._getSettings(),
+          {ca: undefined, cert: [cert], key: [key], requestCert: false});
+    });
+
+    it('accepts multiple objects in the second argument', () => {
+      const keyCertPairs = [
+        {private_key: key, cert_chain: cert},
+        {private_key: key, cert_chain: cert}
+      ];
+      const creds = ServerCredentials.createSsl(null, keyCertPairs, false);
+
+      assert.strictEqual(creds._isSecure(), true);
+      assert.deepStrictEqual(creds._getSettings(), {
+        ca: undefined,
+        cert: [cert, cert],
+        key: [key, key],
+        requestCert: false
+      });
+    });
+
+    it('fails if the second argument is not an Array', () => {
+      assert.throws(() => {
+        ServerCredentials.createSsl(ca, 'test' as any);
+      }, /TypeError: keyCertPairs must be an array/);
+    });
+
+    it('fails if the first argument is a non-Buffer value', () => {
+      assert.throws(() => {
+        ServerCredentials.createSsl('test' as any, []);
+      }, /TypeError: rootCerts must be null or a Buffer/);
+    });
+
+    it('fails if the third argument is a non-boolean value', () => {
+      assert.throws(() => {
+        ServerCredentials.createSsl(ca, [], 'test' as any);
+      }, /TypeError: checkClientCertificate must be a boolean/);
+    });
+
+    it('fails if the array elements are not objects', () => {
+      assert.throws(() => {
+        ServerCredentials.createSsl(ca, ['test'] as any);
+      }, /TypeError: keyCertPair\[0\] must be an object/);
+
+      assert.throws(() => {
+        ServerCredentials.createSsl(ca, [null] as any);
+      }, /TypeError: keyCertPair\[0\] must be an object/);
+    });
+
+    it('fails if the object does not have a Buffer private key', () => {
+      const keyCertPairs: any = [{private_key: 'test', cert_chain: cert}];
+
+      assert.throws(() => {
+        ServerCredentials.createSsl(null, keyCertPairs);
+      }, /TypeError: keyCertPair\[0\].private_key must be a Buffer/);
+    });
+
+    it('fails if the object does not have a Buffer cert chain', () => {
+      const keyCertPairs: any = [{private_key: key, cert_chain: 'test'}];
+
+      assert.throws(() => {
+        ServerCredentials.createSsl(null, keyCertPairs);
+      }, /TypeError: keyCertPair\[0\].cert_chain must be a Buffer/);
+    });
+  });
+});