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# Copyright (C) 2008 The Android Open Source 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.
import copy
import errno
import getopt
import getpass
import imp
import os
import platform
import re
import shlex
import shutil
import subprocess
import sys
import tempfile
import threading
import time
import zipfile
import blockimgdiff
import rangelib
from hashlib import sha1 as sha1
class Options(object):
def __init__(self):
platform_search_path = {
"linux2": "out/host/linux-x86",
"darwin": "out/host/darwin-x86",
}
self.search_path = platform_search_path.get(sys.platform, None)
self.signapk_path = "framework/signapk.jar" # Relative to search_path
self.extra_signapk_args = []
self.java_path = "java" # Use the one on the path by default.
self.java_args = "-Xmx2048m" # JVM Args
self.public_key_suffix = ".x509.pem"
self.private_key_suffix = ".pk8"
# use otatools built boot_signer by default
self.boot_signer_path = "boot_signer"
self.verbose = False
self.tempfiles = []
self.device_specific = None
self.extras = {}
self.info_dict = None
self.worker_threads = None
# Stash size cannot exceed cache_size * threshold.
self.cache_size = None
self.stash_threshold = 0.8
OPTIONS = Options()
# Values for "certificate" in apkcerts that mean special things.
SPECIAL_CERT_STRINGS = ("PRESIGNED", "EXTERNAL")
class ExternalError(RuntimeError):
pass
def Run(args, **kwargs):
"""Create and return a subprocess.Popen object, printing the command
line on the terminal if -v was specified."""
if OPTIONS.verbose:
print " running: ", " ".join(args)
return subprocess.Popen(args, **kwargs)
def CloseInheritedPipes():
""" Gmake in MAC OS has file descriptor (PIPE) leak. We close those fds
before doing other work."""
if platform.system() != "Darwin":
return
for d in range(3, 1025):
try:
stat = os.fstat(d)
if stat is not None:
pipebit = stat[0] & 0x1000
if pipebit != 0:
os.close(d)
except OSError:
pass
def LoadInfoDict(input_file, input_dir=None):
"""Read and parse the META/misc_info.txt key/value pairs from the
input target files and return a dict."""
def read_helper(fn):
if isinstance(input_file, zipfile.ZipFile):
return input_file.read(fn)
else:
path = os.path.join(input_file, *fn.split("/"))
try:
with open(path) as f:
return f.read()
except IOError as e:
if e.errno == errno.ENOENT:
raise KeyError(fn)
d = {}
try:
d = LoadDictionaryFromLines(read_helper("META/misc_info.txt").split("\n"))
except KeyError:
# ok if misc_info.txt doesn't exist
pass
# backwards compatibility: These values used to be in their own
# files. Look for them, in case we're processing an old
# target_files zip.
if "mkyaffs2_extra_flags" not in d:
try:
d["mkyaffs2_extra_flags"] = read_helper(
"META/mkyaffs2-extra-flags.txt").strip()
except KeyError:
# ok if flags don't exist
pass
if "recovery_api_version" not in d:
try:
d["recovery_api_version"] = read_helper(
"META/recovery-api-version.txt").strip()
except KeyError:
raise ValueError("can't find recovery API version in input target-files")
if "tool_extensions" not in d:
try:
d["tool_extensions"] = read_helper("META/tool-extensions.txt").strip()
except KeyError:
# ok if extensions don't exist
pass
if "fstab_version" not in d:
d["fstab_version"] = "1"
# A few properties are stored as links to the files in the out/ directory.
# It works fine with the build system. However, they are no longer available
# when (re)generating from target_files zip. If input_dir is not None, we
# are doing repacking. Redirect those properties to the actual files in the
# unzipped directory.
if input_dir is not None:
# We carry a copy of file_contexts.bin under META/. If not available,
# search BOOT/RAMDISK/. Note that sometimes we may need a different file
# to build images than the one running on device, such as when enabling
# system_root_image. In that case, we must have the one for image
# generation copied to META/.
fc_basename = os.path.basename(d.get("selinux_fc", "file_contexts"))
fc_config = os.path.join(input_dir, "META", fc_basename)
if d.get("system_root_image") == "true":
assert os.path.exists(fc_config)
if not os.path.exists(fc_config):
fc_config = os.path.join(input_dir, "BOOT", "RAMDISK", fc_basename)
if not os.path.exists(fc_config):
fc_config = None
if fc_config:
d["selinux_fc"] = fc_config
# Similarly we need to redirect "ramdisk_dir" and "ramdisk_fs_config".
if d.get("system_root_image") == "true":
d["ramdisk_dir"] = os.path.join(input_dir, "ROOT")
d["ramdisk_fs_config"] = os.path.join(
input_dir, "META", "root_filesystem_config.txt")
try:
data = read_helper("META/imagesizes.txt")
for line in data.split("\n"):
if not line:
continue
name, value = line.split(" ", 1)
if not value:
continue
if name == "blocksize":
d[name] = value
else:
d[name + "_size"] = value
except KeyError:
pass
def makeint(key):
if key in d:
d[key] = int(d[key], 0)
makeint("recovery_api_version")
makeint("blocksize")
makeint("system_size")
makeint("vendor_size")
makeint("userdata_size")
makeint("cache_size")
makeint("recovery_size")
makeint("boot_size")
makeint("fstab_version")
d["fstab"] = LoadRecoveryFSTab(read_helper, d["fstab_version"],
d.get("system_root_image", False))
d["build.prop"] = LoadBuildProp(read_helper)
return d
def LoadBuildProp(read_helper):
try:
data = read_helper("SYSTEM/build.prop")
except KeyError:
print "Warning: could not find SYSTEM/build.prop in %s" % zip
data = ""
return LoadDictionaryFromLines(data.split("\n"))
def LoadDictionaryFromLines(lines):
d = {}
for line in lines:
line = line.strip()
if not line or line.startswith("#"):
continue
if "=" in line:
name, value = line.split("=", 1)
d[name] = value
return d
def LoadRecoveryFSTab(read_helper, fstab_version, system_root_image=False):
class Partition(object):
def __init__(self, mount_point, fs_type, device, length, device2, context):
self.mount_point = mount_point
self.fs_type = fs_type
self.device = device
self.length = length
self.device2 = device2
self.context = context
try:
data = read_helper("RECOVERY/RAMDISK/etc/recovery.fstab")
except KeyError:
print "Warning: could not find RECOVERY/RAMDISK/etc/recovery.fstab"
data = ""
if fstab_version == 1:
d = {}
for line in data.split("\n"):
line = line.strip()
if not line or line.startswith("#"):
continue
pieces = line.split()
if not 3 <= len(pieces) <= 4:
raise ValueError("malformed recovery.fstab line: \"%s\"" % (line,))
options = None
if len(pieces) >= 4:
if pieces[3].startswith("/"):
device2 = pieces[3]
if len(pieces) >= 5:
options = pieces[4]
else:
device2 = None
options = pieces[3]
else:
device2 = None
mount_point = pieces[0]
length = 0
if options:
options = options.split(",")
for i in options:
if i.startswith("length="):
length = int(i[7:])
else:
print "%s: unknown option \"%s\"" % (mount_point, i)
d[mount_point] = Partition(mount_point=mount_point, fs_type=pieces[1],
device=pieces[2], length=length,
device2=device2)
elif fstab_version == 2:
d = {}
for line in data.split("\n"):
line = line.strip()
if not line or line.startswith("#"):
continue
# <src> <mnt_point> <type> <mnt_flags and options> <fs_mgr_flags>
pieces = line.split()
if len(pieces) != 5:
raise ValueError("malformed recovery.fstab line: \"%s\"" % (line,))
# Ignore entries that are managed by vold
options = pieces[4]
if "voldmanaged=" in options:
continue
# It's a good line, parse it
length = 0
options = options.split(",")
for i in options:
if i.startswith("length="):
length = int(i[7:])
else:
# Ignore all unknown options in the unified fstab
continue
mount_flags = pieces[3]
# Honor the SELinux context if present.
context = None
for i in mount_flags.split(","):
if i.startswith("context="):
context = i
mount_point = pieces[1]
d[mount_point] = Partition(mount_point=mount_point, fs_type=pieces[2],
device=pieces[0], length=length,
device2=None, context=context)
else:
raise ValueError("Unknown fstab_version: \"%d\"" % (fstab_version,))
# / is used for the system mount point when the root directory is included in
# system. Other areas assume system is always at "/system" so point /system
# at /.
if system_root_image:
assert not d.has_key("/system") and d.has_key("/")
d["/system"] = d["/"]
return d
def DumpInfoDict(d):
for k, v in sorted(d.items()):
print "%-25s = (%s) %s" % (k, type(v).__name__, v)
def _BuildBootableImage(sourcedir, fs_config_file, info_dict=None,
has_ramdisk=False):
"""Build a bootable image from the specified sourcedir.
Take a kernel, cmdline, and optionally a ramdisk directory from the input (in
'sourcedir'), and turn them into a boot image. Return the image data, or
None if sourcedir does not appear to contains files for building the
requested image."""
def make_ramdisk():
ramdisk_img = tempfile.NamedTemporaryFile()
if os.access(fs_config_file, os.F_OK):
cmd = ["mkbootfs", "-f", fs_config_file,
os.path.join(sourcedir, "RAMDISK")]
else:
cmd = ["mkbootfs", os.path.join(sourcedir, "RAMDISK")]
p1 = Run(cmd, stdout=subprocess.PIPE)
p2 = Run(["minigzip"], stdin=p1.stdout, stdout=ramdisk_img.file.fileno())
p2.wait()
p1.wait()
assert p1.returncode == 0, "mkbootfs of %s ramdisk failed" % (sourcedir,)
assert p2.returncode == 0, "minigzip of %s ramdisk failed" % (sourcedir,)
return ramdisk_img
if not os.access(os.path.join(sourcedir, "kernel"), os.F_OK):
return None
if has_ramdisk and not os.access(os.path.join(sourcedir, "RAMDISK"), os.F_OK):
return None
if info_dict is None:
info_dict = OPTIONS.info_dict
img = tempfile.NamedTemporaryFile()
if has_ramdisk:
ramdisk_img = make_ramdisk()
# use MKBOOTIMG from environ, or "mkbootimg" if empty or not set
mkbootimg = os.getenv('MKBOOTIMG') or "mkbootimg"
cmd = [mkbootimg, "--kernel", os.path.join(sourcedir, "kernel")]
fn = os.path.join(sourcedir, "second")
if os.access(fn, os.F_OK):
cmd.append("--second")
cmd.append(fn)
fn = os.path.join(sourcedir, "cmdline")
if os.access(fn, os.F_OK):
cmd.append("--cmdline")
cmd.append(open(fn).read().rstrip("\n"))
fn = os.path.join(sourcedir, "base")
if os.access(fn, os.F_OK):
cmd.append("--base")
cmd.append(open(fn).read().rstrip("\n"))
fn = os.path.join(sourcedir, "pagesize")
if os.access(fn, os.F_OK):
cmd.append("--pagesize")
cmd.append(open(fn).read().rstrip("\n"))
args = info_dict.get("mkbootimg_args", None)
if args and args.strip():
cmd.extend(shlex.split(args))
if has_ramdisk:
cmd.extend(["--ramdisk", ramdisk_img.name])
img_unsigned = None
if info_dict.get("vboot", None):
img_unsigned = tempfile.NamedTemporaryFile()
cmd.extend(["--output", img_unsigned.name])
else:
cmd.extend(["--output", img.name])
p = Run(cmd, stdout=subprocess.PIPE)
p.communicate()
assert p.returncode == 0, "mkbootimg of %s image failed" % (
os.path.basename(sourcedir),)
if info_dict.get("verity_key", None):
path = "/" + os.path.basename(sourcedir).lower()
cmd = [OPTIONS.boot_signer_path, path, img.name,
info_dict["verity_key"] + ".pk8",
info_dict["verity_key"] + ".x509.pem", img.name]
p = Run(cmd, stdout=subprocess.PIPE)
p.communicate()
assert p.returncode == 0, "boot_signer of %s image failed" % path
# Sign the image if vboot is non-empty.
elif info_dict.get("vboot", None):
path = "/" + os.path.basename(sourcedir).lower()
img_keyblock = tempfile.NamedTemporaryFile()
cmd = [info_dict["vboot_signer_cmd"], info_dict["futility"],
img_unsigned.name, info_dict["vboot_key"] + ".vbpubk",
info_dict["vboot_key"] + ".vbprivk", img_keyblock.name,
img.name]
p = Run(cmd, stdout=subprocess.PIPE)
p.communicate()
assert p.returncode == 0, "vboot_signer of %s image failed" % path
# Clean up the temp files.
img_unsigned.close()
img_keyblock.close()
img.seek(os.SEEK_SET, 0)
data = img.read()
if has_ramdisk:
ramdisk_img.close()
img.close()
return data
def GetBootableImage(name, prebuilt_name, unpack_dir, tree_subdir,
info_dict=None):
"""Return a File object with the desired bootable image.
Look for it in 'unpack_dir'/BOOTABLE_IMAGES under the name 'prebuilt_name',
otherwise look for it under 'unpack_dir'/IMAGES, otherwise construct it from
the source files in 'unpack_dir'/'tree_subdir'."""
prebuilt_path = os.path.join(unpack_dir, "BOOTABLE_IMAGES", prebuilt_name)
if os.path.exists(prebuilt_path):
print "using prebuilt %s from BOOTABLE_IMAGES..." % (prebuilt_name,)
return File.FromLocalFile(name, prebuilt_path)
prebuilt_path = os.path.join(unpack_dir, "IMAGES", prebuilt_name)
if os.path.exists(prebuilt_path):
print "using prebuilt %s from IMAGES..." % (prebuilt_name,)
return File.FromLocalFile(name, prebuilt_path)
print "building image from target_files %s..." % (tree_subdir,)
if info_dict is None:
info_dict = OPTIONS.info_dict
# With system_root_image == "true", we don't pack ramdisk into the boot image.
has_ramdisk = (info_dict.get("system_root_image", None) != "true" or
prebuilt_name != "boot.img")
fs_config = "META/" + tree_subdir.lower() + "_filesystem_config.txt"
data = _BuildBootableImage(os.path.join(unpack_dir, tree_subdir),
os.path.join(unpack_dir, fs_config),
info_dict, has_ramdisk)
if data:
return File(name, data)
return None
def UnzipTemp(filename, pattern=None):
"""Unzip the given archive into a temporary directory and return the name.
If filename is of the form "foo.zip+bar.zip", unzip foo.zip into a
temp dir, then unzip bar.zip into that_dir/BOOTABLE_IMAGES.
Returns (tempdir, zipobj) where zipobj is a zipfile.ZipFile (of the
main file), open for reading.
"""
tmp = tempfile.mkdtemp(prefix="targetfiles-")
OPTIONS.tempfiles.append(tmp)
def unzip_to_dir(filename, dirname):
cmd = ["unzip", "-o", "-q", filename, "-d", dirname]
if pattern is not None:
cmd.append(pattern)
p = Run(cmd, stdout=subprocess.PIPE)
p.communicate()
if p.returncode != 0:
raise ExternalError("failed to unzip input target-files \"%s\"" %
(filename,))
m = re.match(r"^(.*[.]zip)\+(.*[.]zip)$", filename, re.IGNORECASE)
if m:
unzip_to_dir(m.group(1), tmp)
unzip_to_dir(m.group(2), os.path.join(tmp, "BOOTABLE_IMAGES"))
filename = m.group(1)
else:
unzip_to_dir(filename, tmp)
return tmp, zipfile.ZipFile(filename, "r")
def GetKeyPasswords(keylist):
"""Given a list of keys, prompt the user to enter passwords for
those which require them. Return a {key: password} dict. password
will be None if the key has no password."""
no_passwords = []
need_passwords = []
key_passwords = {}
devnull = open("/dev/null", "w+b")
for k in sorted(keylist):
# We don't need a password for things that aren't really keys.
if k in SPECIAL_CERT_STRINGS:
no_passwords.append(k)
continue
p = Run(["openssl", "pkcs8", "-in", k+OPTIONS.private_key_suffix,
"-inform", "DER", "-nocrypt"],
stdin=devnull.fileno(),
stdout=devnull.fileno(),
stderr=subprocess.STDOUT)
p.communicate()
if p.returncode == 0:
# Definitely an unencrypted key.
no_passwords.append(k)
else:
p = Run(["openssl", "pkcs8", "-in", k+OPTIONS.private_key_suffix,
"-inform", "DER", "-passin", "pass:"],
stdin=devnull.fileno(),
stdout=devnull.fileno(),
stderr=subprocess.PIPE)
_, stderr = p.communicate()
if p.returncode == 0:
# Encrypted key with empty string as password.
key_passwords[k] = ''
elif stderr.startswith('Error decrypting key'):
# Definitely encrypted key.
# It would have said "Error reading key" if it didn't parse correctly.
need_passwords.append(k)
else:
# Potentially, a type of key that openssl doesn't understand.
# We'll let the routines in signapk.jar handle it.
no_passwords.append(k)
devnull.close()
key_passwords.update(PasswordManager().GetPasswords(need_passwords))
key_passwords.update(dict.fromkeys(no_passwords, None))
return key_passwords
def SignFile(input_name, output_name, key, password, align=None,
whole_file=False):
"""Sign the input_name zip/jar/apk, producing output_name. Use the
given key and password (the latter may be None if the key does not
have a password.
If align is an integer > 1, zipalign is run to align stored files in
the output zip on 'align'-byte boundaries.
If whole_file is true, use the "-w" option to SignApk to embed a
signature that covers the whole file in the archive comment of the
zip file.
"""
if align == 0 or align == 1:
align = None
if align:
temp = tempfile.NamedTemporaryFile()
sign_name = temp.name
else:
sign_name = output_name
cmd = [OPTIONS.java_path, OPTIONS.java_args, "-jar",
os.path.join(OPTIONS.search_path, OPTIONS.signapk_path)]
cmd.extend(OPTIONS.extra_signapk_args)
if whole_file:
cmd.append("-w")
cmd.extend([key + OPTIONS.public_key_suffix,
key + OPTIONS.private_key_suffix,
input_name, sign_name])
p = Run(cmd, stdin=subprocess.PIPE, stdout=subprocess.PIPE)
if password is not None:
password += "\n"
p.communicate(password)
if p.returncode != 0:
raise ExternalError("signapk.jar failed: return code %s" % (p.returncode,))
if align:
p = Run(["zipalign", "-f", "-p", str(align), sign_name, output_name])
p.communicate()
if p.returncode != 0:
raise ExternalError("zipalign failed: return code %s" % (p.returncode,))
temp.close()
def CheckSize(data, target, info_dict):
"""Check the data string passed against the max size limit, if
any, for the given target. Raise exception if the data is too big.
Print a warning if the data is nearing the maximum size."""
if target.endswith(".img"):
target = target[:-4]
mount_point = "/" + target
fs_type = None
limit = None
if info_dict["fstab"]:
if mount_point == "/userdata":
mount_point = "/data"
p = info_dict["fstab"][mount_point]
fs_type = p.fs_type
device = p.device
if "/" in device:
device = device[device.rfind("/")+1:]
limit = info_dict.get(device + "_size", None)
if not fs_type or not limit:
return
if fs_type == "yaffs2":
# image size should be increased by 1/64th to account for the
# spare area (64 bytes per 2k page)
limit = limit / 2048 * (2048+64)
size = len(data)
pct = float(size) * 100.0 / limit
msg = "%s size (%d) is %.2f%% of limit (%d)" % (target, size, pct, limit)
if pct >= 99.0:
raise ExternalError(msg)
elif pct >= 95.0:
print
print " WARNING: ", msg
print
elif OPTIONS.verbose:
print " ", msg
def ReadApkCerts(tf_zip):
"""Given a target_files ZipFile, parse the META/apkcerts.txt file
and return a {package: cert} dict."""
certmap = {}
for line in tf_zip.read("META/apkcerts.txt").split("\n"):
line = line.strip()
if not line:
continue
m = re.match(r'^name="(.*)"\s+certificate="(.*)"\s+'
r'private_key="(.*)"$', line)
if m:
name, cert, privkey = m.groups()
public_key_suffix_len = len(OPTIONS.public_key_suffix)
private_key_suffix_len = len(OPTIONS.private_key_suffix)
if cert in SPECIAL_CERT_STRINGS and not privkey:
certmap[name] = cert
elif (cert.endswith(OPTIONS.public_key_suffix) and
privkey.endswith(OPTIONS.private_key_suffix) and
cert[:-public_key_suffix_len] == privkey[:-private_key_suffix_len]):
certmap[name] = cert[:-public_key_suffix_len]
else:
raise ValueError("failed to parse line from apkcerts.txt:\n" + line)
return certmap
COMMON_DOCSTRING = """
-p (--path) <dir>
Prepend <dir>/bin to the list of places to search for binaries
run by this script, and expect to find jars in <dir>/framework.
-s (--device_specific) <file>
Path to the python module containing device-specific
releasetools code.
-x (--extra) <key=value>
Add a key/value pair to the 'extras' dict, which device-specific
extension code may look at.
-v (--verbose)
Show command lines being executed.
-h (--help)
Display this usage message and exit.
"""
def Usage(docstring):
print docstring.rstrip("\n")
print COMMON_DOCSTRING
def ParseOptions(argv,
docstring,
extra_opts="", extra_long_opts=(),
extra_option_handler=None):
"""Parse the options in argv and return any arguments that aren't
flags. docstring is the calling module's docstring, to be displayed
for errors and -h. extra_opts and extra_long_opts are for flags
defined by the caller, which are processed by passing them to
extra_option_handler."""
try:
opts, args = getopt.getopt(
argv, "hvp:s:x:" + extra_opts,
["help", "verbose", "path=", "signapk_path=", "extra_signapk_args=",
"java_path=", "java_args=", "public_key_suffix=",
"private_key_suffix=", "boot_signer_path=", "device_specific=",
"extra="] +
list(extra_long_opts))
except getopt.GetoptError as err:
Usage(docstring)
print "**", str(err), "**"
sys.exit(2)
for o, a in opts:
if o in ("-h", "--help"):
Usage(docstring)
sys.exit()
elif o in ("-v", "--verbose"):
OPTIONS.verbose = True
elif o in ("-p", "--path"):
OPTIONS.search_path = a
elif o in ("--signapk_path",):
OPTIONS.signapk_path = a
elif o in ("--extra_signapk_args",):
OPTIONS.extra_signapk_args = shlex.split(a)
elif o in ("--java_path",):
OPTIONS.java_path = a
elif o in ("--java_args",):
OPTIONS.java_args = a
elif o in ("--public_key_suffix",):
OPTIONS.public_key_suffix = a
elif o in ("--private_key_suffix",):
OPTIONS.private_key_suffix = a
elif o in ("--boot_signer_path",):
OPTIONS.boot_signer_path = a
elif o in ("-s", "--device_specific"):
OPTIONS.device_specific = a
elif o in ("-x", "--extra"):
key, value = a.split("=", 1)
OPTIONS.extras[key] = value
else:
if extra_option_handler is None or not extra_option_handler(o, a):
assert False, "unknown option \"%s\"" % (o,)
if OPTIONS.search_path:
os.environ["PATH"] = (os.path.join(OPTIONS.search_path, "bin") +
os.pathsep + os.environ["PATH"])
return args
def MakeTempFile(prefix=None, suffix=None):
"""Make a temp file and add it to the list of things to be deleted
when Cleanup() is called. Return the filename."""
fd, fn = tempfile.mkstemp(prefix=prefix, suffix=suffix)
os.close(fd)
OPTIONS.tempfiles.append(fn)
return fn
def Cleanup():
for i in OPTIONS.tempfiles:
if os.path.isdir(i):
shutil.rmtree(i)
else:
os.remove(i)
class PasswordManager(object):
def __init__(self):
self.editor = os.getenv("EDITOR", None)
self.pwfile = os.getenv("ANDROID_PW_FILE", None)
def GetPasswords(self, items):
"""Get passwords corresponding to each string in 'items',
returning a dict. (The dict may have keys in addition to the
values in 'items'.)
Uses the passwords in $ANDROID_PW_FILE if available, letting the
user edit that file to add more needed passwords. If no editor is
available, or $ANDROID_PW_FILE isn't define, prompts the user
interactively in the ordinary way.
"""
current = self.ReadFile()
first = True
while True:
missing = []
for i in items:
if i not in current or not current[i]:
missing.append(i)
# Are all the passwords already in the file?
if not missing:
return current
for i in missing:
current[i] = ""
if not first:
print "key file %s still missing some passwords." % (self.pwfile,)
answer = raw_input("try to edit again? [y]> ").strip()
if answer and answer[0] not in 'yY':
raise RuntimeError("key passwords unavailable")
first = False
current = self.UpdateAndReadFile(current)
def PromptResult(self, current): # pylint: disable=no-self-use
"""Prompt the user to enter a value (password) for each key in
'current' whose value is fales. Returns a new dict with all the
values.
"""
result = {}
for k, v in sorted(current.iteritems()):
if v:
result[k] = v
else:
while True:
result[k] = getpass.getpass(
"Enter password for %s key> " % k).strip()
if result[k]:
break
return result
def UpdateAndReadFile(self, current):
if not self.editor or not self.pwfile:
return self.PromptResult(current)
f = open(self.pwfile, "w")
os.chmod(self.pwfile, 0o600)
f.write("# Enter key passwords between the [[[ ]]] brackets.\n")
f.write("# (Additional spaces are harmless.)\n\n")
first_line = None
sorted_list = sorted([(not v, k, v) for (k, v) in current.iteritems()])
for i, (_, k, v) in enumerate(sorted_list):
f.write("[[[ %s ]]] %s\n" % (v, k))
if not v and first_line is None:
# position cursor on first line with no password.
first_line = i + 4
f.close()
p = Run([self.editor, "+%d" % (first_line,), self.pwfile])
_, _ = p.communicate()
return self.ReadFile()
def ReadFile(self):
result = {}
if self.pwfile is None:
return result
try:
f = open(self.pwfile, "r")
for line in f:
line = line.strip()
if not line or line[0] == '#':
continue
m = re.match(r"^\[\[\[\s*(.*?)\s*\]\]\]\s*(\S+)$", line)
if not m:
print "failed to parse password file: ", line
else:
result[m.group(2)] = m.group(1)
f.close()
except IOError as e:
if e.errno != errno.ENOENT:
print "error reading password file: ", str(e)
return result
def ZipWrite(zip_file, filename, arcname=None, perms=0o644,
compress_type=None):
import datetime
# http://b/18015246
# Python 2.7's zipfile implementation wrongly thinks that zip64 is required
# for files larger than 2GiB. We can work around this by adjusting their
# limit. Note that `zipfile.writestr()` will not work for strings larger than
# 2GiB. The Python interpreter sometimes rejects strings that large (though
# it isn't clear to me exactly what circumstances cause this).
# `zipfile.write()` must be used directly to work around this.
#
# This mess can be avoided if we port to python3.
saved_zip64_limit = zipfile.ZIP64_LIMIT
zipfile.ZIP64_LIMIT = (1 << 32) - 1
if compress_type is None:
compress_type = zip_file.compression
if arcname is None:
arcname = filename
saved_stat = os.stat(filename)
try:
# `zipfile.write()` doesn't allow us to pass ZipInfo, so just modify the
# file to be zipped and reset it when we're done.
os.chmod(filename, perms)
# Use a fixed timestamp so the output is repeatable.
epoch = datetime.datetime.fromtimestamp(0)
timestamp = (datetime.datetime(2009, 1, 1) - epoch).total_seconds()
os.utime(filename, (timestamp, timestamp))
zip_file.write(filename, arcname=arcname, compress_type=compress_type)
finally:
os.chmod(filename, saved_stat.st_mode)
os.utime(filename, (saved_stat.st_atime, saved_stat.st_mtime))
zipfile.ZIP64_LIMIT = saved_zip64_limit
def ZipWriteStr(zip_file, zinfo_or_arcname, data, perms=None,
compress_type=None):
"""Wrap zipfile.writestr() function to work around the zip64 limit.
Even with the ZIP64_LIMIT workaround, it won't allow writing a string
longer than 2GiB. It gives 'OverflowError: size does not fit in an int'
when calling crc32(bytes).
But it still works fine to write a shorter string into a large zip file.
We should use ZipWrite() whenever possible, and only use ZipWriteStr()
when we know the string won't be too long.
"""
saved_zip64_limit = zipfile.ZIP64_LIMIT
zipfile.ZIP64_LIMIT = (1 << 32) - 1
if not isinstance(zinfo_or_arcname, zipfile.ZipInfo):
zinfo = zipfile.ZipInfo(filename=zinfo_or_arcname)
zinfo.compress_type = zip_file.compression
if perms is None:
perms = 0o100644
else:
zinfo = zinfo_or_arcname
# If compress_type is given, it overrides the value in zinfo.
if compress_type is not None:
zinfo.compress_type = compress_type
# If perms is given, it has a priority.
if perms is not None:
# If perms doesn't set the file type, mark it as a regular file.
if perms & 0o770000 == 0:
perms |= 0o100000
zinfo.external_attr = perms << 16
# Use a fixed timestamp so the output is repeatable.
zinfo.date_time = (2009, 1, 1, 0, 0, 0)
zip_file.writestr(zinfo, data)
zipfile.ZIP64_LIMIT = saved_zip64_limit
def ZipClose(zip_file):
# http://b/18015246
# zipfile also refers to ZIP64_LIMIT during close() when it writes out the
# central directory.
saved_zip64_limit = zipfile.ZIP64_LIMIT
zipfile.ZIP64_LIMIT = (1 << 32) - 1
zip_file.close()
zipfile.ZIP64_LIMIT = saved_zip64_limit
class DeviceSpecificParams(object):
module = None
def __init__(self, **kwargs):
"""Keyword arguments to the constructor become attributes of this
object, which is passed to all functions in the device-specific
module."""
for k, v in kwargs.iteritems():
setattr(self, k, v)
self.extras = OPTIONS.extras
if self.module is None:
path = OPTIONS.device_specific
if not path:
return
try:
if os.path.isdir(path):
info = imp.find_module("releasetools", [path])
else:
d, f = os.path.split(path)
b, x = os.path.splitext(f)
if x == ".py":
f = b
info = imp.find_module(f, [d])
print "loaded device-specific extensions from", path
self.module = imp.load_module("device_specific", *info)
except ImportError:
print "unable to load device-specific module; assuming none"
def _DoCall(self, function_name, *args, **kwargs):
"""Call the named function in the device-specific module, passing
the given args and kwargs. The first argument to the call will be
the DeviceSpecific object itself. If there is no module, or the
module does not define the function, return the value of the
'default' kwarg (which itself defaults to None)."""
if self.module is None or not hasattr(self.module, function_name):
return kwargs.get("default", None)
return getattr(self.module, function_name)(*((self,) + args), **kwargs)
def FullOTA_Assertions(self):
"""Called after emitting the block of assertions at the top of a
full OTA package. Implementations can add whatever additional
assertions they like."""
return self._DoCall("FullOTA_Assertions")
def FullOTA_InstallBegin(self):
"""Called at the start of full OTA installation."""
return self._DoCall("FullOTA_InstallBegin")
def FullOTA_InstallEnd(self):
"""Called at the end of full OTA installation; typically this is
used to install the image for the device's baseband processor."""
return self._DoCall("FullOTA_InstallEnd")
def IncrementalOTA_Assertions(self):
"""Called after emitting the block of assertions at the top of an
incremental OTA package. Implementations can add whatever
additional assertions they like."""
return self._DoCall("IncrementalOTA_Assertions")
def IncrementalOTA_VerifyBegin(self):
"""Called at the start of the verification phase of incremental
OTA installation; additional checks can be placed here to abort
the script before any changes are made."""
return self._DoCall("IncrementalOTA_VerifyBegin")
def IncrementalOTA_VerifyEnd(self):
"""Called at the end of the verification phase of incremental OTA
installation; additional checks can be placed here to abort the
script before any changes are made."""
return self._DoCall("IncrementalOTA_VerifyEnd")
def IncrementalOTA_InstallBegin(self):
"""Called at the start of incremental OTA installation (after
verification is complete)."""
return self._DoCall("IncrementalOTA_InstallBegin")
def IncrementalOTA_InstallEnd(self):
"""Called at the end of incremental OTA installation; typically
this is used to install the image for the device's baseband
processor."""
return self._DoCall("IncrementalOTA_InstallEnd")
class File(object):
def __init__(self, name, data):
self.name = name
self.data = data
self.size = len(data)
self.sha1 = sha1(data).hexdigest()
@classmethod
def FromLocalFile(cls, name, diskname):
f = open(diskname, "rb")
data = f.read()
f.close()
return File(name, data)
def WriteToTemp(self):
t = tempfile.NamedTemporaryFile()
t.write(self.data)
t.flush()
return t
def AddToZip(self, z, compression=None):
ZipWriteStr(z, self.name, self.data, compress_type=compression)
DIFF_PROGRAM_BY_EXT = {
".gz" : "imgdiff",
".zip" : ["imgdiff", "-z"],
".jar" : ["imgdiff", "-z"],
".apk" : ["imgdiff", "-z"],
".img" : "imgdiff",
}
class Difference(object):
def __init__(self, tf, sf, diff_program=None):
self.tf = tf
self.sf = sf
self.patch = None
self.diff_program = diff_program
def ComputePatch(self):
"""Compute the patch (as a string of data) needed to turn sf into
tf. Returns the same tuple as GetPatch()."""
tf = self.tf
sf = self.sf
if self.diff_program:
diff_program = self.diff_program
else:
ext = os.path.splitext(tf.name)[1]
diff_program = DIFF_PROGRAM_BY_EXT.get(ext, "bsdiff")
ttemp = tf.WriteToTemp()
stemp = sf.WriteToTemp()
ext = os.path.splitext(tf.name)[1]
try:
ptemp = tempfile.NamedTemporaryFile()
if isinstance(diff_program, list):
cmd = copy.copy(diff_program)
else:
cmd = [diff_program]
cmd.append(stemp.name)
cmd.append(ttemp.name)
cmd.append(ptemp.name)
p = Run(cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
err = []
def run():
_, e = p.communicate()
if e:
err.append(e)
th = threading.Thread(target=run)
th.start()
th.join(timeout=300) # 5 mins
if th.is_alive():
print "WARNING: diff command timed out"
p.terminate()
th.join(5)
if th.is_alive():
p.kill()
th.join()
if err or p.returncode != 0:
print "WARNING: failure running %s:\n%s\n" % (
diff_program, "".join(err))
self.patch = None
return None, None, None
diff = ptemp.read()
finally:
ptemp.close()
stemp.close()
ttemp.close()
self.patch = diff
return self.tf, self.sf, self.patch
def GetPatch(self):
"""Return a tuple (target_file, source_file, patch_data).
patch_data may be None if ComputePatch hasn't been called, or if
computing the patch failed."""
return self.tf, self.sf, self.patch
def ComputeDifferences(diffs):
"""Call ComputePatch on all the Difference objects in 'diffs'."""
print len(diffs), "diffs to compute"
# Do the largest files first, to try and reduce the long-pole effect.
by_size = [(i.tf.size, i) for i in diffs]
by_size.sort(reverse=True)
by_size = [i[1] for i in by_size]
lock = threading.Lock()
diff_iter = iter(by_size) # accessed under lock
def worker():
try:
lock.acquire()
for d in diff_iter:
lock.release()
start = time.time()
d.ComputePatch()
dur = time.time() - start
lock.acquire()
tf, sf, patch = d.GetPatch()
if sf.name == tf.name:
name = tf.name
else:
name = "%s (%s)" % (tf.name, sf.name)
if patch is None:
print "patching failed! %s" % (name,)
else:
print "%8.2f sec %8d / %8d bytes (%6.2f%%) %s" % (
dur, len(patch), tf.size, 100.0 * len(patch) / tf.size, name)
lock.release()
except Exception as e:
print e
raise
# start worker threads; wait for them all to finish.
threads = [threading.Thread(target=worker)
for i in range(OPTIONS.worker_threads)]
for th in threads:
th.start()
while threads:
threads.pop().join()
class BlockDifference(object):
def __init__(self, partition, tgt, src=None, check_first_block=False,
version=None):
self.tgt = tgt
self.src = src
self.partition = partition
self.check_first_block = check_first_block
# Due to http://b/20939131, check_first_block is disabled temporarily.
assert not self.check_first_block
if version is None:
version = 1
if OPTIONS.info_dict:
version = max(
int(i) for i in
OPTIONS.info_dict.get("blockimgdiff_versions", "1").split(","))
self.version = version
b = blockimgdiff.BlockImageDiff(tgt, src, threads=OPTIONS.worker_threads,
version=self.version)
tmpdir = tempfile.mkdtemp()
OPTIONS.tempfiles.append(tmpdir)
self.path = os.path.join(tmpdir, partition)
b.Compute(self.path)
_, self.device = GetTypeAndDevice("/" + partition, OPTIONS.info_dict)
def WriteScript(self, script, output_zip, progress=None):
if not self.src:
# write the output unconditionally
script.Print("Patching %s image unconditionally..." % (self.partition,))
else:
script.Print("Patching %s image after verification." % (self.partition,))
if progress:
script.ShowProgress(progress, 0)
self._WriteUpdate(script, output_zip)
self._WritePostInstallVerifyScript(script)
def WriteVerifyScript(self, script):
partition = self.partition
if not self.src:
script.Print("Image %s will be patched unconditionally." % (partition,))
else:
ranges = self.src.care_map.subtract(self.src.clobbered_blocks)
ranges_str = ranges.to_string_raw()
if self.version >= 3:
script.AppendExtra(('if (range_sha1("%s", "%s") == "%s" || '
'block_image_verify("%s", '
'package_extract_file("%s.transfer.list"), '
'"%s.new.dat", "%s.patch.dat")) then') % (
self.device, ranges_str, self.src.TotalSha1(),
self.device, partition, partition, partition))
else:
script.AppendExtra('if range_sha1("%s", "%s") == "%s" then' % (
self.device, ranges_str, self.src.TotalSha1()))
script.Print('Verified %s image...' % (partition,))
script.AppendExtra('else')
# When generating incrementals for the system and vendor partitions,
# explicitly check the first block (which contains the superblock) of
# the partition to see if it's what we expect. If this check fails,
# give an explicit log message about the partition having been
# remounted R/W (the most likely explanation) and the need to flash to
# get OTAs working again.
if self.check_first_block:
self._CheckFirstBlock(script)
# Abort the OTA update. Note that the incremental OTA cannot be applied
# even if it may match the checksum of the target partition.
# a) If version < 3, operations like move and erase will make changes
# unconditionally and damage the partition.
# b) If version >= 3, it won't even reach here.
script.AppendExtra(('abort("%s partition has unexpected contents");\n'
'endif;') % (partition,))
def _WritePostInstallVerifyScript(self, script):
partition = self.partition
script.Print('Verifying the updated %s image...' % (partition,))
# Unlike pre-install verification, clobbered_blocks should not be ignored.
ranges = self.tgt.care_map
ranges_str = ranges.to_string_raw()
script.AppendExtra('if range_sha1("%s", "%s") == "%s" then' % (
self.device, ranges_str,
self.tgt.TotalSha1(include_clobbered_blocks=True)))
# Bug: 20881595
# Verify that extended blocks are really zeroed out.
if self.tgt.extended:
ranges_str = self.tgt.extended.to_string_raw()
script.AppendExtra('if range_sha1("%s", "%s") == "%s" then' % (
self.device, ranges_str,
self._HashZeroBlocks(self.tgt.extended.size())))
script.Print('Verified the updated %s image.' % (partition,))
script.AppendExtra(
'else\n'
' abort("%s partition has unexpected non-zero contents after OTA '
'update");\n'
'endif;' % (partition,))
else:
script.Print('Verified the updated %s image.' % (partition,))
script.AppendExtra(
'else\n'
' abort("%s partition has unexpected contents after OTA update");\n'
'endif;' % (partition,))
def _WriteUpdate(self, script, output_zip):
ZipWrite(output_zip,
'{}.transfer.list'.format(self.path),
'{}.transfer.list'.format(self.partition))
ZipWrite(output_zip,
'{}.new.dat'.format(self.path),
'{}.new.dat'.format(self.partition))
ZipWrite(output_zip,
'{}.patch.dat'.format(self.path),
'{}.patch.dat'.format(self.partition),
compress_type=zipfile.ZIP_STORED)
call = ('block_image_update("{device}", '
'package_extract_file("{partition}.transfer.list"), '
'"{partition}.new.dat", "{partition}.patch.dat");\n'.format(
device=self.device, partition=self.partition))
script.AppendExtra(script.WordWrap(call))
def _HashBlocks(self, source, ranges): # pylint: disable=no-self-use
data = source.ReadRangeSet(ranges)
ctx = sha1()
for p in data:
ctx.update(p)
return ctx.hexdigest()
def _HashZeroBlocks(self, num_blocks): # pylint: disable=no-self-use
"""Return the hash value for all zero blocks."""
zero_block = '\x00' * 4096
ctx = sha1()
for _ in range(num_blocks):
ctx.update(zero_block)
return ctx.hexdigest()
# TODO(tbao): Due to http://b/20939131, block 0 may be changed without
# remounting R/W. Will change the checking to a finer-grained way to
# mask off those bits.
def _CheckFirstBlock(self, script):
r = rangelib.RangeSet((0, 1))
srchash = self._HashBlocks(self.src, r)
script.AppendExtra(('(range_sha1("%s", "%s") == "%s") || '
'abort("%s has been remounted R/W; '
'reflash device to reenable OTA updates");')
% (self.device, r.to_string_raw(), srchash,
self.device))
DataImage = blockimgdiff.DataImage
# map recovery.fstab's fs_types to mount/format "partition types"
PARTITION_TYPES = {
"yaffs2": "MTD",
"mtd": "MTD",
"ext4": "EMMC",
"emmc": "EMMC",
"f2fs": "EMMC",
"squashfs": "EMMC"
}
def GetTypeAndDevice(mount_point, info):
fstab = info["fstab"]
if fstab:
return (PARTITION_TYPES[fstab[mount_point].fs_type],
fstab[mount_point].device)
else:
raise KeyError
def ParseCertificate(data):
"""Parse a PEM-format certificate."""
cert = []
save = False
for line in data.split("\n"):
if "--END CERTIFICATE--" in line:
break
if save:
cert.append(line)
if "--BEGIN CERTIFICATE--" in line:
save = True
cert = "".join(cert).decode('base64')
return cert
def MakeRecoveryPatch(input_dir, output_sink, recovery_img, boot_img,
info_dict=None):
"""Generate a binary patch that creates the recovery image starting
with the boot image. (Most of the space in these images is just the
kernel, which is identical for the two, so the resulting patch
should be efficient.) Add it to the output zip, along with a shell
script that is run from init.rc on first boot to actually do the
patching and install the new recovery image.
recovery_img and boot_img should be File objects for the
corresponding images. info should be the dictionary returned by
common.LoadInfoDict() on the input target_files.
"""
if info_dict is None:
info_dict = OPTIONS.info_dict
full_recovery_image = info_dict.get("full_recovery_image", None) == "true"
system_root_image = info_dict.get("system_root_image", None) == "true"
if full_recovery_image:
output_sink("etc/recovery.img", recovery_img.data)
else:
diff_program = ["imgdiff"]
path = os.path.join(input_dir, "SYSTEM", "etc", "recovery-resource.dat")
if os.path.exists(path):
diff_program.append("-b")
diff_program.append(path)
bonus_args = "-b /system/etc/recovery-resource.dat"
else:
bonus_args = ""
d = Difference(recovery_img, boot_img, diff_program=diff_program)
_, _, patch = d.ComputePatch()
output_sink("recovery-from-boot.p", patch)
try:
boot_type, boot_device = GetTypeAndDevice("/boot", info_dict)
recovery_type, recovery_device = GetTypeAndDevice("/recovery", info_dict)
except KeyError:
return
if full_recovery_image:
sh = """#!/system/bin/sh
if ! applypatch -c %(type)s:%(device)s:%(size)d:%(sha1)s; then
applypatch /system/etc/recovery.img %(type)s:%(device)s %(sha1)s %(size)d && log -t recovery "Installing new recovery image: succeeded" || log -t recovery "Installing new recovery image: failed"
else
log -t recovery "Recovery image already installed"
fi
""" % {'type': recovery_type,
'device': recovery_device,
'sha1': recovery_img.sha1,
'size': recovery_img.size}
else:
sh = """#!/system/bin/sh
if ! applypatch -c %(recovery_type)s:%(recovery_device)s:%(recovery_size)d:%(recovery_sha1)s; then
applypatch %(bonus_args)s %(boot_type)s:%(boot_device)s:%(boot_size)d:%(boot_sha1)s %(recovery_type)s:%(recovery_device)s %(recovery_sha1)s %(recovery_size)d %(boot_sha1)s:/system/recovery-from-boot.p && log -t recovery "Installing new recovery image: succeeded" || log -t recovery "Installing new recovery image: failed"
else
log -t recovery "Recovery image already installed"
fi
""" % {'boot_size': boot_img.size,
'boot_sha1': boot_img.sha1,
'recovery_size': recovery_img.size,
'recovery_sha1': recovery_img.sha1,
'boot_type': boot_type,
'boot_device': boot_device,
'recovery_type': recovery_type,
'recovery_device': recovery_device,
'bonus_args': bonus_args}
# The install script location moved from /system/etc to /system/bin
# in the L release. Parse init.*.rc files to find out where the
# target-files expects it to be, and put it there.
sh_location = "etc/install-recovery.sh"
found = False
if system_root_image:
init_rc_dir = os.path.join(input_dir, "ROOT")
else:
init_rc_dir = os.path.join(input_dir, "BOOT", "RAMDISK")
init_rc_files = os.listdir(init_rc_dir)
for init_rc_file in init_rc_files:
if (not init_rc_file.startswith('init.') or
not init_rc_file.endswith('.rc')):
continue
with open(os.path.join(init_rc_dir, init_rc_file)) as f:
for line in f:
m = re.match(r"^service flash_recovery /system/(\S+)\s*$", line)
if m:
sh_location = m.group(1)
found = True
break
if found:
break
print "putting script in", sh_location
output_sink(sh_location, sh)