Added RSA key generator for register_host.py

remoting/tools/keygen.py

+# Copyright (c) 2010 The Chromium Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+import os
+import platform
+import sys
+
+SCRIPT_PATH = os.path.dirname(sys.argv[0])
+if SCRIPT_PATH == "":
+  SCRIPT_PATH = os.getcwd()
+
+if platform.system() == "Windows":
+  KEYGEN_PATH = SCRIPT_PATH + '\..\Debug\chromoting_host_keygen.exe'
+elif platform.system() == "Darwin": # Darwin == MacOSX
+  KEYGEN_PATH = SCRIPT_PATH + '/../../xcodebuild/Debug/chromoting_host_keygen'
+else:
+  KEYGEN_PATH = SCRIPT_PATH + '/../../out/Debug/chromoting_host_keygen'
+
+def generateRSAKeyPair():
+  """Returns (priv, pub) keypair where priv is a new private key and
+  pub corresponding public key.  Both keys are BASE64 encoded."""
+  pipe = os.popen(KEYGEN_PATH)
+  out = pipe.readlines()
+  if len(out) != 2:
+    raise Exception("chromoting_host_keygen failed.")
+  return (out[0].strip(), out[1].strip())