releasetools: Add script to sign zips

Change-Id: I9cbeb6edea79a7e9bb0fc692e53497b54058d67f
(cherry picked from commit 040a8b007974c6cb56d361d6db8ba96f9b63da10)

Author: Gabriele M

Diff for: tools/releasetools/sign_zip.py

@@ -0,0 +1,69 @@
+#!/usr/bin/env python
+#
+# Copyright (C) 2017 The LineageOS Project
+#
+# 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.
+
+"""
+Signs the given zip with the given key producing a new zip.
+
+Usage:  sign_release_zip [flags] input_zip output_zip
+
+  -k (--package_key) <key> Key to use to sign the package (default is
+      "build/target/product/security/testkey").
+"""
+import sys
+
+import common
+
+OPTIONS = common.OPTIONS
+
+OPTIONS.package_key = "build/target/product/security/testkey"
+
+def SignOutput(input_zip_name, output_zip_name):
+  key_passwords = common.GetKeyPasswords([OPTIONS.package_key])
+  pw = key_passwords[OPTIONS.package_key]
+
+  common.SignFile(input_zip_name, output_zip_name, OPTIONS.package_key, pw,
+                  whole_file=True)
+
+
+def main(argv):
+
+  def option_handler(o, a):
+    if o in ("-k", "--package_key"):
+      OPTIONS.package_key = a
+    else:
+      return False
+    return True
+
+  args = common.ParseOptions(argv, __doc__,
+                             extra_opts="k:",
+                             extra_long_opts=[
+                                 "package_key=",
+                             ], extra_option_handler=option_handler)
+  if len(args) != 2:
+    common.Usage(__doc__)
+    sys.exit(1)
+
+  SignOutput(args[0], args[1])
+
+
+if __name__ == '__main__':
+  try:
+    main(sys.argv[1:])
+  except common.ExternalError as e:
+    print()
+    print("   ERROR: %s" % e)
+    print()
+    sys.exit(1)