Adds SecurityContext.usePrivateKeyBytes

tests/standalone/io/secure_server_client_certificate_test.dart

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 import "dart:async";
 import "dart:io";
 
 import "package:async_helper/async_helper.dart";
 import "package:expect/expect.dart";
 
 InternetAddress HOST;
 
 String localFile(path) => Platform.script.resolve(path).toFilePath();
+List<int> readLocalFile(path) => (new File(localFile(path))).readAsBytesSync();
 
 SecurityContext serverContext = new SecurityContext()
   ..useCertificateChain(localFile('certificates/server_chain.pem'))
-  ..usePrivateKey(localFile('certificates/server_key.pem'),
-      password: 'dartdart')
+  ..usePrivateKeyAsBytes(readLocalFile('certificates/server_key.pem'),
+                       password: 'dartdart')
   ..setTrustedCertificates(file: localFile('certificates/client_authority.pem'))
   ..setClientAuthorities(localFile('certificates/client_authority.pem'));
 
 SecurityContext clientCertContext = new SecurityContext()
   ..setTrustedCertificates(file: localFile('certificates/trusted_certs.pem'))
   ..useCertificateChain(localFile('certificates/client1.pem'))
-  ..usePrivateKey(localFile('certificates/client1_key.pem'),
-      password: 'dartdart');
+  ..usePrivateKeyAsBytes(readLocalFile('certificates/client1_key.pem'),
+                                       password: 'dartdart');
 
 SecurityContext clientNoCertContext = new SecurityContext()
   ..setTrustedCertificates(file: localFile('certificates/trusted_certs.pem'));
 
 Future testClientCertificate({bool required, bool sendCert}) async {
   var server = await SecureServerSocket.bind(HOST, 0, serverContext,
       requestClientCertificate: true, requireClientCertificate: required);
   var clientContext = sendCert ? clientCertContext : clientNoCertContext;
   var clientEndFuture =
       SecureSocket.connect(HOST, server.port, context: clientContext);
@@ skipping 30 matching lines @@
 
 main() async {
   asyncStart();
   HOST = (await InternetAddress.lookup("localhost")).first;
   await testClientCertificate(required: false, sendCert: true);
   await testClientCertificate(required: true, sendCert: true);
   await testClientCertificate(required: false, sendCert: false);
   await testClientCertificate(required: true, sendCert: false);
   asyncEnd();
 }