This works but it's currently too fragile: - For the zImages, it relies on the compressed image being smaller, if not we need to at least append the size of the compressed Image to the zImage - It doesn't autodetect much, for instance we need to autodetect the compression type (xz, lzma, gzip, etc). - The bootimages are not reproducibles (probably because a random ID is added to the image). This prevents adding some easy testing where we could automatically download some Replicant 6 images and add root to them and compare the result with some checksums.
The source code also has additional TODOs inside it. Signed-off-by: Denis 'GNUtoo' Carikli <gnu...@cyberdimension.org> --- images/add_adb_root/.gitignore | 10 + images/add_adb_root/COPYING | 661 ++++++++++++++++++ images/add_adb_root/Makefile | 43 ++ images/add_adb_root/README | 22 + images/add_adb_root/add_adb_root.py | 254 +++++++ images/add_adb_root/files_checksums.py | 94 +++ .../tests/recovery-i9100-with-root.img.sha512 | 1 + 7 files changed, 1085 insertions(+) create mode 100644 images/add_adb_root/.gitignore create mode 100644 images/add_adb_root/COPYING create mode 100644 images/add_adb_root/Makefile create mode 100644 images/add_adb_root/README create mode 100755 images/add_adb_root/add_adb_root.py create mode 100644 images/add_adb_root/files_checksums.py create mode 100644 images/add_adb_root/tests/recovery-i9100-with-root.img.sha512 diff --git a/images/add_adb_root/.gitignore b/images/add_adb_root/.gitignore new file mode 100644 index 0000000..d6b11b4 --- /dev/null +++ b/images/add_adb_root/.gitignore @@ -0,0 +1,10 @@ +# Tests +tests/recovery-i9100.img +tests/recovery-i9100-with-root.img +tests/recovery-i9300.img +tests/recovery-i9300-with-root.img + +__pycache__ + +\#*\# +*~ diff --git a/images/add_adb_root/COPYING b/images/add_adb_root/COPYING new file mode 100644 index 0000000..be3f7b2 --- /dev/null +++ b/images/add_adb_root/COPYING @@ -0,0 +1,661 @@ + GNU AFFERO GENERAL PUBLIC LICENSE + Version 3, 19 November 2007 + + Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/> + Everyone is permitted to copy and distribute verbatim copies + of this license document, but changing it is not allowed. + + Preamble + + The GNU Affero General Public License is a free, copyleft license for +software and other kinds of works, specifically designed to ensure +cooperation with the community in the case of network server software. + + The licenses for most software and other practical works are designed +to take away your freedom to share and change the works. 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There are many ways you could offer source, and different +solutions will be better for different programs; see section 13 for the +specific requirements. + + You should also get your employer (if you work as a programmer) or school, +if any, to sign a "copyright disclaimer" for the program, if necessary. +For more information on this, and how to apply and follow the GNU AGPL, see +<https://www.gnu.org/licenses/>. diff --git a/images/add_adb_root/Makefile b/images/add_adb_root/Makefile new file mode 100644 index 0000000..7724ab8 --- /dev/null +++ b/images/add_adb_root/Makefile @@ -0,0 +1,43 @@ +# For the tests +CURL ?= curl +MIRROR ?= https://ftp.osuosl.org/pub/replicant/images/replicant-6.0/0004-rc4/images + +# For make install +DESTDIR ?= /usr/local/bin +INSTALL ?= install + +PROGNAME := add_adb_root.py +.PHONY: all help check install test-recovery-i9100 test-recovery-i9300 + +all: help + +help: + @echo "Available commands:" + @echo -e "\tmake help\tPrints the help" + @echo -e "\tmake check\tRun tests" + @echo -e "\tmake install\tInstall $(PROGNAME)" + +tests/recovery-i9100.img: + mkdir -p tests + $(CURL) $(MIRROR)/i9100/recovery-i9100.img -o $@ + +tests/recovery-i9300.img: + mkdir -p tests + $(CURL) $(MIRROR)/i9300/recovery-i9300.img -o $@ + +# TODO: test-recovery-i9300 always fails as the resulting image is different +# at each test +check: test-recovery-i9100 + +test-recovery-i9100: tests/recovery-i9100.img + @./$(PROGNAME) tests/recovery-i9100.img tests/recovery-i9100-with-root.img + @sha512sum -c tests/recovery-i9100-with-root.img.sha512 + @echo "[ OK ] GT-I9100 image" + +test-recovery-i9300: tests/recovery-i9300.img + @./$(PROGNAME) tests/recovery-i9300.img tests/recovery-i9300-with-root.img + @sha512sum -c tests/recovery-i9300-with-root.img.sha512 + @echo "[ OK ] GT-I9300 image" + +install: + $(INSTALL) -m 755 $(PROGNAME) -t $(DESTDIR) diff --git a/images/add_adb_root/README b/images/add_adb_root/README new file mode 100644 index 0000000..9b8714e --- /dev/null +++ b/images/add_adb_root/README @@ -0,0 +1,22 @@ +== Introduction == +The goal of this tool is to enable adb as root on existing boot.img and +recovery.img images. + +Having adb as root on boot.img and recovery.img can be very useful: usually root +it not enabled by default in an unauthenticated way to protect against juice +jacking, however there are cases where it's really required: +- You might need to get early boot logs, and if your device isn't booting you + cannot boot it to setup adb. +- You might need to type commands as root in a recovery to recover non-booting + devices. For instance if a corrupted partition can prevent booting. + +== Dependencies == +- gunzip from gzip or other implementations +- gzip from gzip or other implementations +- mkbootimg from android-tools (http://tools.android.com/) +- mktemp from coreutils or other implementations +- python (version 3) +- python-sh +- sed from sed or other implementations +- sha512sum from coreutils or other implementations +- fso-unbootimg from freesmartphone.org utilities (git://github.com/freesmartphone/utilities.git) diff --git a/images/add_adb_root/add_adb_root.py b/images/add_adb_root/add_adb_root.py new file mode 100755 index 0000000..f7e6b0b --- /dev/null +++ b/images/add_adb_root/add_adb_root.py @@ -0,0 +1,254 @@ +#!/usr/bin/env python3 +# Copyright (C) 2020 Denis 'GNUtoo' Carikli <gnu...@cyberdimension.org> +# +# This program is free software: you can redistribute it and/or modify +# it under the terms of the GNU Affero General Public License as published by +# the Free Software Foundation, either version 3 of the License, or +# (at your option) any later version. +# +# This program is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU Affero General Public License for more details. +# +# You should have received a copy of the GNU Affero General Public License +# along with this program. If not, see <https://www.gnu.org/licenses/>. +import enum +import os +import re +import sh +import sys + +# TODO: +# import tempfile + +import files_checksums + +class ImageType(enum.Enum): + unknown = 0 + zImage = 1 + bootimage = 2 + +def usage(progname): + print("{} <path/to/old/recovery.img> <path/to/new/recovery.img>".format(progname)) + sys.exit(1) + +def automatically_identify_file(path): + file_infos = {} + + # TODO: use file to get that + file_infos['format'] = 'boot.img' + + # TODO: detect that and also allow 'boot' + file_infos['type'] = 'recovery' + + # TODO: use file hash for that + file_infos['release'] = None + + # TODO: is it really relevant? + file_infos['target'] = None + + output = str(sh.unbootimg("-i", path)).split(os.linesep) + + for line in output: + if line.startswith('kernel load addr:'): + for word in line.split(" "): + if word.startswith("0x"): + kernel_load_addr = int(word, 16) + # TODO: Add support for 64bit targets + file_infos['base_address'] = kernel_load_addr & 0xffff0000 + + if line.startswith('cmdline:'): + for word in line.split(" "): + if word.startswith("`"): + file_infos['cmdline'] = \ + word.replace("`", "").replace("'", "") + + return file_infos + +def identify_file(path): + output = sh.sha512sum(path).split(" ") + checksum = output[0] + + # TODO: handle checksums not found + file_infos = None + try: + file_infos = files_checksums.checksums[checksum] + except: + pass + return file_infos + +def identify_image_type(path): + try: + output = sh.unbootimg("-i", path) + except Exception as e: + if e.stderr == b'error: supplied file is not an Android boot image\n': + return ImageType.zImage + else: + return ImageType.unknown + + return ImageType.bootimage + +def check_file(file_path): + file_infos = identify_file(file_path) + if file_infos is None: + file_infos = automatically_identify_file(file_path) + + if file_infos is None: + print("/!\ TODO: Add support for that file by adding new checksums") + sys.exit(1) + + if file_infos['type'] != 'recovery': + print("/!\ The file is not a recovery") + print("/!\ TODO: Add support new file types") + sys.exit(1) + + return file_infos + +def add_adb_to_ramdisk(ramdisk): + sh.sed("s#ro.adb.secure=1# #", + "-i", ramdisk) + + sh.sed("s#ro.secure=1#ro.secure=0#", + "-i", ramdisk) + + sh.sed("s#persist.sys.usb.config=none#persist.sys.usb.config=adb #", + "-i", ramdisk) + +def add_adb_to_zImage(input_file, output_file): + tmpdir = str(sh.mktemp("-d")).replace(os.linesep, "") + + uncompressed_Image = None + ramdisk = None + + args = ["-e", "-C", tmpdir, input_file] + print(["binwalk"] + args) + output = sh.binwalk(args) + + # Example: /tmp/tmp.dkbDvuu7PL/_recovery-i9100.img.extracted + binwalk_dir = tmpdir + os.sep \ + + "_" + os.path.basename(input_file) + ".extracted" + print("binwalk_dir: {}".format(binwalk_dir)) + + files = os.listdir(binwalk_dir) + for f in files: + if f.endswith(".7z"): + uncompressed_Image = binwalk_dir + os.sep + f[0:-3] + + # example: in + # /tmp/tmp.dkbDvuu7PL/_recovery-i9100.img.extracted/1E74 + # we want 0x1E74 as int + uncompressed_Image_offset = int("0x" + os.path.basename(uncompressed_Image), + 16) + + print("Uncompressed Image: {} @ {}".format( + uncompressed_Image, + str(hex(uncompressed_Image_offset)))) + + # We want the ramdisk cpio file + args = ["-e", "-C", binwalk_dir, uncompressed_Image] + print(["binwalk"] + args) + output = sh.binwalk(args) + + files = os.listdir(binwalk_dir) + ramdisk_dir = binwalk_dir \ + + os.sep + "_" \ + + os.path.basename(uncompressed_Image) \ + + ".extracted" + + files = os.listdir(ramdisk_dir) + for f in files: + if f.endswith(".cpio"): + ramdisk = ramdisk_dir + os.sep + f + + # example: in + # /tmp/tmp.dkbDvuu7PL/_recovery-i9100.img.extracted/_1E74.extracted/32C9C.cpio + # we want 0x32C9C as int + ramdisk_offset = int("0x" + os.path.basename(ramdisk)[0:-5], 16) + + print("Ramdisk: {} @ {}".format(ramdisk, str(hex(ramdisk_offset)))) + + add_adb_to_ramdisk(ramdisk) + + # ddrescue handles block size automatically + # and doesn't truncate the file by default + args = [ ramdisk, + uncompressed_Image, + "-o", + str(ramdisk_offset)] + print(["ddrescue"] + args) + sh.ddrescue(args) + + # Issues: + # no size_append like in scripts/Makefile.lib + # Size too big + sh.lzma("-9", uncompressed_Image) + compressed_Image = uncompressed_Image + ".lzma" + + # TODO: Add the size of the file to the zImage + + if os.path.exists(output_file): + sh.unlink(output_file) + + sh.cp(input_file, output_file) + + args = [compressed_Image, + output_file , + "-o", + str(uncompressed_Image_offset)] + + print(["ddrescue"] + args) + + sh.ddrescue(args) + +def add_adb_to_bootimage(input_file, output_file): + file_infos = check_file(input_file) + + # TODO: + # tempfile.TemporaryDirectory().name + tmpdir = str(sh.mktemp("-d")).replace(os.linesep, "") + + kernel = tmpdir + os.sep + "kernel.img" + ramdisk = tmpdir + os.sep + "ramdisk.cpio" + compressed_ramdisk = ramdisk + ".gz" + + # TODO: autodetect cmdline and base_address + base_address = file_infos['base_address'] + cmdline = file_infos['cmdline'] + + # TODO: check output + output = sh.unbootimg("--kernel", kernel, + "--ramdisk", compressed_ramdisk, + "-i", input_file) + + sh.gunzip(compressed_ramdisk) + + # TODO: + # file ramdisk.cpio + + add_adb_to_ramdisk(ramdisk) + + sh.gzip(ramdisk) + + sh.mkbootimg("--base", base_address, + "--kernel", kernel, + "--ramdisk", compressed_ramdisk, + "--cmdline={}".format(cmdline), + "-o", output_file) + +if __name__ == "__main__": + + if len(sys.argv) != 3: + usage(sys.argv[0]) + + file_path = sys.argv[1] + target_image = sys.argv[2] + + image_type = identify_image_type(file_path) + if image_type == ImageType.zImage: + add_adb_to_zImage(file_path, target_image) + elif image_type == ImageType.bootimage: + add_adb_to_bootimage(file_path, target_image) + + # TODO: clenup: + # - remove tmpdir diff --git a/images/add_adb_root/files_checksums.py b/images/add_adb_root/files_checksums.py new file mode 100644 index 0000000..bc5a657 --- /dev/null +++ b/images/add_adb_root/files_checksums.py @@ -0,0 +1,94 @@ +#!/usr/bin/env python3 +# Copyright (C) 2020 Denis 'GNUtoo' Carikli <gnu...@cyberdimension.org> +# +# This program is free software: you can redistribute it and/or modify +# it under the terms of the GNU Affero General Public License as published by +# the Free Software Foundation, either version 3 of the License, or +# (at your option) any later version. +# +# This program is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU Affero General Public License for more details. +# +# You should have received a copy of the GNU Affero General Public License +# along with this program. If not, see <https://www.gnu.org/licenses/>. + +checksums = { + 'b428bf8562f88c1a8f98eaeeda78ab24da0d5874fb61af6fbb4e349a1171a2a0c4894627bc3388c0946b6f97cdcfc850c06b1ec9f702e03634ecb95fd9af3972' : { + 'base_address' : '0x40000000', + 'cmdline': 'androidboot.hardware=espresso', + 'format': 'boot.img', + 'release' : '6.0 0004 RC1', + 'target' : 'espresso3g', + 'type' : 'recovery', + }, + 'ba0bcf425b489b8ceb57e9e417420d8dc6d847d20dc30e571b4cd3e8d79a40927798baf61331a1fdcc1bba90e5755db9fad742bf8614ac723ae2560c448bfa50' : { + 'base_address' : '0x40000000', + 'cmdline' : 'androidboot.hardware=espresso', + 'format': 'boot.img', + 'release': '6.0 0004 RC1', + 'target' : 'espressowifi', + 'type' : 'recovery', + }, + '406ef21bfe0f4beaf614eedcc0cff4fb1263ee2bf880697dc91adb0939e8a05f36edbb2b2e873c5a66a048681922b843a873de95c72ea80b0cee813215c6ad5a' : { + 'format' : 'zImage', + 'release': '6.0 0004 RC1', + 'target' : 'i9100', + 'type' : 'recovery', + }, + '09fded5e5391033640283712e98258b5249955694fb9856e4a7895403d5966b6fe70572f96ff7711490993d23425b4af2e0500f661f1cabfdce812d2545d7d3d' : { + 'base_address' : '0x40000000', + 'cmdline': 'console=ttySAC2,115200', + 'format': 'boot.img', + 'release': '6.0 0004 RC1', + 'target' : 'i9300', + 'type' : 'recovery', + }, + '543b14d8462b48a76f32b6561fa904c5a4e370ae0e3b0398e008c5dca588eb9295ceb5eb12bbf42d0bf7d09e20c41db0fd37d5297bd0f01a4b732072891f8e26' : { + 'base_address' : '0x40000000', + 'cmdline': 'console=ttySAC2,115200', + 'format': 'boot.img', + 'release': '6.0 0004 RC1', + 'target' : 'i9305', + 'type' : 'recovery', + }, + 'af614206279811c6d04104f994fc3640df758a96fc4558032629e97a3132e29d7332c926ce1ac3d18c17ef5e89fc1eeb9d3c0e7e66a948d33100c0667f91203c' : { + 'base_address' : '0x80000000', + 'cmdline' : 'androidboot.hardware=tuna', + 'format': 'boot.img', + 'release': '6.0 0004 RC1', + 'target' : 'maguro', + 'type' : 'recovery', + }, + '053c4c560ea87137733ec54fa9a99411f9c9996017f141ce575849b2a4369525323097ce54f15b8c73bda1c9af4d65f9b3056a0bb3e8a77c9d45b479f147e5d0' : { + 'base_address' : '0x40000000', + 'cmdline' : 'console=ttySAC2,115200', + 'format': 'boot.img', + 'release': '6.0 0004 RC1', + 'target' : 'n5100', + 'type' : 'recovery', + }, + '61bb86154219614ad331d5946cfe7a1a8abb1563a965f3434fab59c77c6f7d6478fa27b6ff23548a5e874ea677cbbea9a74fac521267f1ab9117bd1929a0b403' : { + 'base_address' : '0x40000000', + 'cmdline' : 'console=ttySAC2,115200', + 'format': 'boot.img', + 'release': '6.0 0004 RC1', + 'target' : 'n5110', + 'type' : 'recovery', + }, + '041aff2badd6d3f797c7ba3d66000fa835d474ddc619721daccdfc8492f5df73ca6ed5b1fed8bfa49a4e00712a213a9cbf502d4a4608d4eceacb1a9cd0274070' : { + 'format' : 'zImage', + 'release': '6.0 0004 RC1', + 'target' : 'n7000', + 'type' : 'recovery', + }, + 'feb6f7837400c6a826c39c5d64aacb8d44d131b72dedcd3fd3a6d0c4dc8c721b28a6cdb3e47c160f909a779cd98c42b5099f58c73649404a3f81df28995bdc53' : { + 'base_address' : '0x40000000', + 'cmdline' : 'console=ttySAC2,115200', + 'format': 'boot.img', + 'release': '6.0 0004 RC1', + 'target' : 'n7100', + 'type' : 'recovery', + }, +} diff --git a/images/add_adb_root/tests/recovery-i9100-with-root.img.sha512 b/images/add_adb_root/tests/recovery-i9100-with-root.img.sha512 new file mode 100644 index 0000000..a7cabe4 --- /dev/null +++ b/images/add_adb_root/tests/recovery-i9100-with-root.img.sha512 @@ -0,0 +1 @@ +2d779c500421f89407e4172842b82957269a53fedeb88ef150455783247e268e4ba5f4ffb73b7ca0fba31d9281e6ebb1ea7a02ad6683313c1dd804635b6f59b9 tests/recovery-i9100-with-root.img -- 2.32.0 _______________________________________________ Replicant mailing list Replicant@osuosl.org https://lists.osuosl.org/mailman/listinfo/replicant