461 lines
15 KiB
Python
Executable file
461 lines
15 KiB
Python
Executable file
#!/usr/bin/env python
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#
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# Copyright (C) 2008 The Android Open Source Project
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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"""
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Signs all the APK files in a target-files zipfile, producing a new
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target-files zip.
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Usage: sign_target_files_apks [flags] input_target_files output_target_files
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-e (--extra_apks) <name,name,...=key>
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Add extra APK name/key pairs as though they appeared in
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apkcerts.txt (so mappings specified by -k and -d are applied).
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Keys specified in -e override any value for that app contained
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in the apkcerts.txt file. Option may be repeated to give
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multiple extra packages.
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-k (--key_mapping) <src_key=dest_key>
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Add a mapping from the key name as specified in apkcerts.txt (the
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src_key) to the real key you wish to sign the package with
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(dest_key). Option may be repeated to give multiple key
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mappings.
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-d (--default_key_mappings) <dir>
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Set up the following key mappings:
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$devkey/devkey ==> $dir/releasekey
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$devkey/testkey ==> $dir/releasekey
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$devkey/media ==> $dir/media
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$devkey/shared ==> $dir/shared
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$devkey/platform ==> $dir/platform
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where $devkey is the directory part of the value of
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default_system_dev_certificate from the input target-files's
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META/misc_info.txt. (Defaulting to "build/target/product/security"
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if the value is not present in misc_info.
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-d and -k options are added to the set of mappings in the order
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in which they appear on the command line.
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-o (--replace_ota_keys)
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Replace the certificate (public key) used by OTA package
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verification with the one specified in the input target_files
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zip (in the META/otakeys.txt file). Key remapping (-k and -d)
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is performed on this key.
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-t (--tag_changes) <+tag>,<-tag>,...
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Comma-separated list of changes to make to the set of tags (in
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the last component of the build fingerprint). Prefix each with
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'+' or '-' to indicate whether that tag should be added or
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removed. Changes are processed in the order they appear.
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Default value is "-test-keys,-dev-keys,+release-keys".
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"""
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import sys
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if sys.hexversion < 0x02070000:
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print >> sys.stderr, "Python 2.7 or newer is required."
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sys.exit(1)
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import base64
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import cStringIO
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import copy
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import errno
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import os
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import re
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import shutil
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import subprocess
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import tempfile
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import zipfile
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import common
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OPTIONS = common.OPTIONS
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OPTIONS.extra_apks = {}
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OPTIONS.key_map = {}
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OPTIONS.replace_ota_keys = False
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OPTIONS.tag_changes = ("-test-keys", "-dev-keys", "+release-keys")
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def GetApkCerts(tf_zip):
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certmap = common.ReadApkCerts(tf_zip)
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# apply the key remapping to the contents of the file
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for apk, cert in certmap.iteritems():
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certmap[apk] = OPTIONS.key_map.get(cert, cert)
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# apply all the -e options, overriding anything in the file
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for apk, cert in OPTIONS.extra_apks.iteritems():
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if not cert:
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cert = "PRESIGNED"
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certmap[apk] = OPTIONS.key_map.get(cert, cert)
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return certmap
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def CheckAllApksSigned(input_tf_zip, apk_key_map):
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"""Check that all the APKs we want to sign have keys specified, and
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error out if they don't."""
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unknown_apks = []
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for info in input_tf_zip.infolist():
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if info.filename.endswith(".apk"):
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name = os.path.basename(info.filename)
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if name not in apk_key_map:
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unknown_apks.append(name)
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if unknown_apks:
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print "ERROR: no key specified for:\n\n ",
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print "\n ".join(unknown_apks)
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print "\nUse '-e <apkname>=' to specify a key (which may be an"
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print "empty string to not sign this apk)."
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sys.exit(1)
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def SignApk(data, keyname, pw):
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unsigned = tempfile.NamedTemporaryFile()
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unsigned.write(data)
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unsigned.flush()
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signed = tempfile.NamedTemporaryFile()
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common.SignFile(unsigned.name, signed.name, keyname, pw, align=4)
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data = signed.read()
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unsigned.close()
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signed.close()
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return data
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def ProcessTargetFiles(input_tf_zip, output_tf_zip, misc_info,
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apk_key_map, key_passwords):
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maxsize = max([len(os.path.basename(i.filename))
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for i in input_tf_zip.infolist()
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if i.filename.endswith('.apk')])
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rebuild_recovery = False
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tmpdir = tempfile.mkdtemp()
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def write_to_temp(fn, attr, data):
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fn = os.path.join(tmpdir, fn)
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if fn.endswith("/"):
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fn = os.path.join(tmpdir, fn)
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os.mkdir(fn)
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else:
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d = os.path.dirname(fn)
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if d and not os.path.exists(d):
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os.makedirs(d)
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if attr >> 16 == 0xa1ff:
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os.symlink(data, fn)
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else:
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with open(fn, "wb") as f:
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f.write(data)
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for info in input_tf_zip.infolist():
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data = input_tf_zip.read(info.filename)
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out_info = copy.copy(info)
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if (info.filename.startswith("BOOT/") or
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info.filename.startswith("RECOVERY/") or
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info.filename.startswith("META/") or
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info.filename == "SYSTEM/etc/recovery-resource.dat"):
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write_to_temp(info.filename, info.external_attr, data)
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if info.filename.endswith(".apk"):
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name = os.path.basename(info.filename)
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key = apk_key_map[name]
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if key not in common.SPECIAL_CERT_STRINGS:
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print " signing: %-*s (%s)" % (maxsize, name, key)
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signed_data = SignApk(data, key, key_passwords[key])
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output_tf_zip.writestr(out_info, signed_data)
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else:
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# an APK we're not supposed to sign.
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print "NOT signing: %s" % (name,)
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output_tf_zip.writestr(out_info, data)
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elif info.filename in ("SYSTEM/build.prop",
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"RECOVERY/RAMDISK/default.prop"):
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print "rewriting %s:" % (info.filename,)
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new_data = RewriteProps(data, misc_info)
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output_tf_zip.writestr(out_info, new_data)
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if info.filename == "RECOVERY/RAMDISK/default.prop":
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write_to_temp(info.filename, info.external_attr, new_data)
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elif info.filename.endswith("mac_permissions.xml"):
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print "rewriting %s with new keys." % (info.filename,)
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new_data = ReplaceCerts(data)
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output_tf_zip.writestr(out_info, new_data)
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elif info.filename in ("SYSTEM/recovery-from-boot.p",
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"SYSTEM/bin/install-recovery.sh"):
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rebuild_recovery = True
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elif (OPTIONS.replace_ota_keys and
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info.filename in ("RECOVERY/RAMDISK/res/keys",
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"SYSTEM/etc/security/otacerts.zip")):
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# don't copy these files if we're regenerating them below
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pass
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else:
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# a non-APK file; copy it verbatim
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output_tf_zip.writestr(out_info, data)
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if OPTIONS.replace_ota_keys:
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new_recovery_keys = ReplaceOtaKeys(input_tf_zip, output_tf_zip, misc_info)
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if new_recovery_keys:
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write_to_temp("RECOVERY/RAMDISK/res/keys", 0755 << 16, new_recovery_keys)
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if rebuild_recovery:
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recovery_img = common.GetBootableImage(
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"recovery.img", "recovery.img", tmpdir, "RECOVERY", info_dict=misc_info)
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boot_img = common.GetBootableImage(
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"boot.img", "boot.img", tmpdir, "BOOT", info_dict=misc_info)
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def output_sink(fn, data):
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output_tf_zip.writestr("SYSTEM/"+fn, data)
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common.MakeRecoveryPatch(tmpdir, output_sink, recovery_img, boot_img,
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info_dict=misc_info)
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shutil.rmtree(tmpdir)
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def ReplaceCerts(data):
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"""Given a string of data, replace all occurences of a set
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of X509 certs with a newer set of X509 certs and return
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the updated data string."""
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for old, new in OPTIONS.key_map.iteritems():
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try:
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if OPTIONS.verbose:
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print " Replacing %s.x509.pem with %s.x509.pem" % (old, new)
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f = open(old + ".x509.pem")
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old_cert16 = base64.b16encode(common.ParseCertificate(f.read())).lower()
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f.close()
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f = open(new + ".x509.pem")
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new_cert16 = base64.b16encode(common.ParseCertificate(f.read())).lower()
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f.close()
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# Only match entire certs.
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pattern = "\\b"+old_cert16+"\\b"
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(data, num) = re.subn(pattern, new_cert16, data, flags=re.IGNORECASE)
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if OPTIONS.verbose:
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print " Replaced %d occurence(s) of %s.x509.pem with " \
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"%s.x509.pem" % (num, old, new)
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except IOError, e:
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if (e.errno == errno.ENOENT and not OPTIONS.verbose):
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continue
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print " Error accessing %s. %s. Skip replacing %s.x509.pem " \
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"with %s.x509.pem." % (e.filename, e.strerror, old, new)
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return data
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def EditTags(tags):
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"""Given a string containing comma-separated tags, apply the edits
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specified in OPTIONS.tag_changes and return the updated string."""
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tags = set(tags.split(","))
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for ch in OPTIONS.tag_changes:
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if ch[0] == "-":
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tags.discard(ch[1:])
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elif ch[0] == "+":
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tags.add(ch[1:])
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return ",".join(sorted(tags))
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def RewriteProps(data, misc_info):
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output = []
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for line in data.split("\n"):
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line = line.strip()
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original_line = line
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if line and line[0] != '#' and "=" in line:
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key, value = line.split("=", 1)
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if (key == "ro.build.fingerprint"
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and misc_info.get("oem_fingerprint_properties") is None):
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pieces = value.split("/")
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pieces[-1] = EditTags(pieces[-1])
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value = "/".join(pieces)
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elif (key == "ro.build.thumbprint"
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and misc_info.get("oem_fingerprint_properties") is not None):
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pieces = value.split("/")
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pieces[-1] = EditTags(pieces[-1])
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value = "/".join(pieces)
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elif key == "ro.build.description":
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pieces = value.split(" ")
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assert len(pieces) == 5
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pieces[-1] = EditTags(pieces[-1])
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value = " ".join(pieces)
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elif key == "ro.build.tags":
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value = EditTags(value)
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elif key == "ro.build.display.id":
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# change, eg, "JWR66N dev-keys" to "JWR66N"
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value = value.split()
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if len(value) > 1 and value[-1].endswith("-keys"):
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value.pop()
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value = " ".join(value)
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line = key + "=" + value
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if line != original_line:
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print " replace: ", original_line
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print " with: ", line
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output.append(line)
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return "\n".join(output) + "\n"
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def ReplaceOtaKeys(input_tf_zip, output_tf_zip, misc_info):
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try:
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keylist = input_tf_zip.read("META/otakeys.txt").split()
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except KeyError:
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raise common.ExternalError("can't read META/otakeys.txt from input")
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extra_recovery_keys = misc_info.get("extra_recovery_keys", None)
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if extra_recovery_keys:
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extra_recovery_keys = [OPTIONS.key_map.get(k, k) + ".x509.pem"
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for k in extra_recovery_keys.split()]
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if extra_recovery_keys:
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print "extra recovery-only key(s): " + ", ".join(extra_recovery_keys)
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else:
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extra_recovery_keys = []
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mapped_keys = []
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for k in keylist:
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m = re.match(r"^(.*)\.x509\.pem$", k)
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if not m:
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raise common.ExternalError(
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"can't parse \"%s\" from META/otakeys.txt" % (k,))
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k = m.group(1)
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mapped_keys.append(OPTIONS.key_map.get(k, k) + ".x509.pem")
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if mapped_keys:
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print "using:\n ", "\n ".join(mapped_keys)
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print "for OTA package verification"
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else:
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devkey = misc_info.get("default_system_dev_certificate",
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"build/target/product/security/testkey")
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mapped_keys.append(
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OPTIONS.key_map.get(devkey, devkey) + ".x509.pem")
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print "META/otakeys.txt has no keys; using", mapped_keys[0]
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# recovery uses a version of the key that has been slightly
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# predigested (by DumpPublicKey.java) and put in res/keys.
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# extra_recovery_keys are used only in recovery.
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p = common.Run(["java", "-jar",
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os.path.join(OPTIONS.search_path, "framework", "dumpkey.jar")]
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+ mapped_keys + extra_recovery_keys,
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stdout=subprocess.PIPE)
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new_recovery_keys, _ = p.communicate()
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if p.returncode != 0:
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raise common.ExternalError("failed to run dumpkeys")
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common.ZipWriteStr(output_tf_zip, "RECOVERY/RAMDISK/res/keys",
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new_recovery_keys)
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# SystemUpdateActivity uses the x509.pem version of the keys, but
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# put into a zipfile system/etc/security/otacerts.zip.
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# We DO NOT include the extra_recovery_keys (if any) here.
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tempfile = cStringIO.StringIO()
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certs_zip = zipfile.ZipFile(tempfile, "w")
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for k in mapped_keys:
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certs_zip.write(k)
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certs_zip.close()
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common.ZipWriteStr(output_tf_zip, "SYSTEM/etc/security/otacerts.zip",
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tempfile.getvalue())
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return new_recovery_keys
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def BuildKeyMap(misc_info, key_mapping_options):
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for s, d in key_mapping_options:
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if s is None: # -d option
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devkey = misc_info.get("default_system_dev_certificate",
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"build/target/product/security/testkey")
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devkeydir = os.path.dirname(devkey)
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OPTIONS.key_map.update({
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devkeydir + "/testkey": d + "/releasekey",
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devkeydir + "/devkey": d + "/releasekey",
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devkeydir + "/media": d + "/media",
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devkeydir + "/shared": d + "/shared",
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devkeydir + "/platform": d + "/platform",
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})
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else:
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OPTIONS.key_map[s] = d
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def main(argv):
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key_mapping_options = []
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def option_handler(o, a):
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if o in ("-e", "--extra_apks"):
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names, key = a.split("=")
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names = names.split(",")
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for n in names:
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OPTIONS.extra_apks[n] = key
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elif o in ("-d", "--default_key_mappings"):
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key_mapping_options.append((None, a))
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elif o in ("-k", "--key_mapping"):
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key_mapping_options.append(a.split("=", 1))
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elif o in ("-o", "--replace_ota_keys"):
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OPTIONS.replace_ota_keys = True
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elif o in ("-t", "--tag_changes"):
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new = []
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for i in a.split(","):
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i = i.strip()
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if not i or i[0] not in "-+":
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raise ValueError("Bad tag change '%s'" % (i,))
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new.append(i[0] + i[1:].strip())
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OPTIONS.tag_changes = tuple(new)
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else:
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return False
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return True
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args = common.ParseOptions(argv, __doc__,
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extra_opts="e:d:k:ot:",
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extra_long_opts=["extra_apks=",
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"default_key_mappings=",
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"key_mapping=",
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"replace_ota_keys",
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"tag_changes="],
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extra_option_handler=option_handler)
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if len(args) != 2:
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common.Usage(__doc__)
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sys.exit(1)
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input_zip = zipfile.ZipFile(args[0], "r")
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output_zip = zipfile.ZipFile(args[1], "w")
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misc_info = common.LoadInfoDict(input_zip)
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BuildKeyMap(misc_info, key_mapping_options)
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apk_key_map = GetApkCerts(input_zip)
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CheckAllApksSigned(input_zip, apk_key_map)
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key_passwords = common.GetKeyPasswords(set(apk_key_map.values()))
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ProcessTargetFiles(input_zip, output_zip, misc_info,
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apk_key_map, key_passwords)
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input_zip.close()
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output_zip.close()
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print "done."
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if __name__ == '__main__':
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try:
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main(sys.argv[1:])
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except common.ExternalError, e:
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print
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print " ERROR: %s" % (e,)
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print
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sys.exit(1)
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