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Side by Side Diff: bin/au_test_harness/public_key_manager.py

Issue 6717011: Remove au_test_harness code and change symlinks to point to new location (Closed) Base URL: http://git.chromium.org/git/crosutils.git@master
Patch Set: Created 9 years, 9 months ago
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1 # Copyright (c) 2011 The Chromium OS Authors. All rights reserved.
2 # Use of this source code is governed by a BSD-style license that can be
3 # found in the LICENSE file.
4
5 """This module manages interactions between an image and a public key."""
6
7 import os
8 import tempfile
9
10 import cros_build_lib as cros_lib
11
12 class PublicKeyManager(object):
13 """Class wrapping interactions with a public key on an image."""
14 TARGET_KEY_PATH = 'usr/share/update_engine/update-payload-key.pub.pem'
15
16 def __init__(self, image_path, key_path):
17 """Initializes a manager with image_path and key_path we plan to insert."""
18 self.image_path = image_path
19 self.key_path = key_path
20 self._rootfs_dir = tempfile.mkdtemp(suffix='rootfs', prefix='tmp')
21 self._stateful_dir = tempfile.mkdtemp(suffix='stateful', prefix='tmp')
22
23 # Gather some extra information about the image.
24 try:
25 cros_lib.MountImage(image_path, self._rootfs_dir, self._stateful_dir,
26 read_only=True)
27 self._full_target_key_path = os.path.join(
28 self._rootfs_dir, PublicKeyManager.TARGET_KEY_PATH)
29 self._is_key_new = True
30 if os.path.exists(self._full_target_key_path):
31 diff_output = cros_lib.RunCommand(['diff',
32 self.key_path,
33 self._full_target_key_path],
34 print_cmd=False, redirect_stdout=True,
35 redirect_stderr=True, error_ok=True)
36
37 if not diff_output: self._is_key_new = False
38
39 finally:
40 cros_lib.UnmountImage(self._rootfs_dir, self._stateful_dir)
41
42 def __del__(self):
43 """Remove our temporary directories we created in init."""
44 os.rmdir(self._rootfs_dir)
45 os.rmdir(self._stateful_dir)
46
47 def AddKeyToImage(self):
48 """Adds the key specified in init to the image."""
49 if not self._is_key_new:
50 cros_lib.Info('Public key already on image %s. No work to do.' %
51 self.image_path)
52 return
53
54 cros_lib.Info('Copying %s into %s' % (self.key_path, self.image_path))
55 try:
56 cros_lib.MountImage(self.image_path, self._rootfs_dir, self._stateful_dir,
57 read_only=False)
58
59 dir_path = os.path.dirname(self._full_target_key_path)
60 cros_lib.RunCommand(['sudo', 'mkdir', '--parents', dir_path],
61 print_cmd=False)
62 cros_lib.RunCommand(['sudo', 'cp', '--force', '-p', self.key_path,
63 self._full_target_key_path], print_cmd=False)
64 finally:
65 cros_lib.UnmountImage(self._rootfs_dir, self._stateful_dir)
66 self._MakeImageBootable()
67
68 def RemoveKeyFromImage(self):
69 """Removes the key specified in init from the image."""
70 cros_lib.Info('Removing public key from image %s.' % self.image_path)
71 try:
72 cros_lib.MountImage(self.image_path, self._rootfs_dir, self._stateful_dir,
73 read_only=False)
74 cros_lib.RunCommand(['sudo', 'rm', '--force', self._full_target_key_path],
75 print_cmd=False)
76 finally:
77 cros_lib.UnmountImage(self._rootfs_dir, self._stateful_dir)
78 self._MakeImageBootable()
79
80 def _MakeImageBootable(self):
81 """Makes the image bootable. Note, it is only useful for non-vm images."""
82 image = os.path.basename(self.image_path)
83 if 'qemu' in image:
84 return
85
86 from_dir = os.path.dirname(self.image_path)
87 cros_lib.RunCommand(['bin/cros_make_image_bootable',
88 cros_lib.ReinterpretPathForChroot(from_dir),
89 image], print_cmd=False, redirect_stdout=True,
90 redirect_stderr=True, enter_chroot=True,
91 cwd=cros_lib.CROSUTILS_DIRECTORY)
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