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@teacupx
Forked from ruario/1-README.md
Created December 30, 2018 19:30
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Fetches a ChromeOS image for ARM and extracts the Widevine and Flash binaries, saving them in a compressed archive
#!/bin/sh -eu
# Make sure we have wget or curl
available () {
command -v "$1" >/dev/null 2>&1
}
if available wget; then
DL="wget -O-"
DL_SL="wget -qO-"
elif available curl; then
DL="curl -L"
DL_SL="curl -s"
else
echo "Install Wget or cURL" >&2
exit 1
fi
# Find a URL to a suitable arm64 ChromeOS recovery image
CHROMEOS_URL="$($DL_SL https://dl.google.com/dl/edgedl/chromeos/recovery/recovery.conf | grep -A11 C101PA | sed -n 's/^url=//p')"
CHROMEOS_IMG="$(basename "$CHROMEOS_URL" .zip)"
if [ -e "$CHROMEOS_IMG" ]; then
CHROMEOS_IMG_PATH="./"
DEL_IMG=N
else
CHROMEOS_IMG_PATH="$(mktemp -td ChromeOS-IMG.XXXXXX)"
DEL_IMG=Y
# Fetch the recovery image (2Gb+ on disk after download)
$DL "$CHROMEOS_URL" | zcat > "$CHROMEOS_IMG_PATH/$CHROMEOS_IMG"
fi
# Note the next free loop device in a variable
LOOPD="$(losetup -f)"
# If root, we can mount silently (no popup windows after mount)
if [ "$USER" = "root" ]; then
MNTPNT="$(mktemp -d -t ChromeOS.XXXXXX)"
losetup -Pf "$CHROMEOS_IMG_PATH/$CHROMEOS_IMG"
mount -o ro "${LOOPD}p3" "$MNTPNT"
else
# Associate all the partitions on the disk image with loop devices:
udisksctl loop-setup -rf "$CHROMEOS_IMG_PATH/$CHROMEOS_IMG"
sleep 1
# Mount the third partition of the disk image (if the previous did not do it automatically)
if ! lsblk -lo MOUNTPOINT "${LOOPD}p3" | tail -n1 | grep -q \.; then
udisksctl mount -b "${LOOPD}p3"
fi
# Note the mount point in a variable
MNTPNT="$(lsblk -lo MOUNTPOINT "${LOOPD}p3" | tail -n1)"
fi
# Extract the libs out and copy them to a compressed tar archive
ARCHIVE_NAME="widevine-flash-$(date '+%Y%m%d')_arm64.tgz"
echo "Extracting and compressing files"
tar -C"$MNTPNT" -caf "$ARCHIVE_NAME" opt/google/chrome/libwidevinecdm.so opt/google/chrome/pepper/libpepflashplayer.so --xform 's/pepper/PepperFlash/' --format ustar
echo "Created: $ARCHIVE_NAME"
# Cleanup
if [ "$USER" = "root" ]; then
umount "$MNTPNT"
losetup -d "$LOOPD"
rmdir "$MNTPNT"
else
ALLMNTS="$(lsblk -lo NAME,MOUNTPOINT "$LOOPD" | sed -n '/\//s/^\(loop[0-9]\+p[0-9]\+\).*/\1/p')"
echo "$ALLMNTS" | xargs -I{} -n1 udisksctl unmount -b /dev/{}
if [ "$LOOPD" != "$(losetup -f)" ]; then
udisksctl loop-delete -b "$LOOPD"
fi
fi
if [ "$DEL_IMG" = "N" ] || [ "${1:-EMPTY}" = "-k" ]; then
:
else
rm "$CHROMEOS_IMG_PATH/$CHROMEOS_IMG"
rmdir -v "$CHROMEOS_IMG_PATH"
fi
# Inform the user how to proceed
cat <<EOF
To install the contents of these files on an ARM64 device, copy the tar archive over to the target machine and issue the following:
sudo tar -C/ -xf $ARCHIVE_NAME
EOF
#!/bin/sh -eu
# Make sure we have wget or curl
available () {
command -v "$1" >/dev/null 2>&1
}
if available wget; then
DL="wget -O-"
DL_SL="wget -qO-"
elif available curl; then
DL="curl -L"
DL_SL="curl -s"
else
echo "Install Wget or cURL" >&2
exit 1
fi
# Find a URL to a suitable armhf ChromeOS recovery image
CHROMEOS_URL="$($DL_SL https://dl.google.com/dl/edgedl/chromeos/recovery/recovery.conf | grep -A11 CB5-312T | sed -n 's/^url=//p')"
CHROMEOS_IMG="$(basename "$CHROMEOS_URL" .zip)"
if [ -e "$CHROMEOS_IMG" ]; then
CHROMEOS_IMG_PATH="./"
DEL_IMG=N
else
CHROMEOS_IMG_PATH="$(mktemp -td ChromeOS-IMG.XXXXXX)"
DEL_IMG=Y
# Fetch the recovery image (2Gb+ on disk after download)
$DL "$CHROMEOS_URL" | zcat > "$CHROMEOS_IMG_PATH/$CHROMEOS_IMG"
fi
# Note the next free loop device in a variable
LOOPD="$(losetup -f)"
# If root, we can mount silently (no popup windows after mount)
if [ "$USER" = "root" ]; then
MNTPNT="$(mktemp -d -t ChromeOS.XXXXXX)"
losetup -Pf "$CHROMEOS_IMG_PATH/$CHROMEOS_IMG"
mount -o ro "${LOOPD}p3" "$MNTPNT"
else
# Associate all the partitions on the disk image with loop devices:
udisksctl loop-setup -rf "$CHROMEOS_IMG_PATH/$CHROMEOS_IMG"
sleep 1
# Mount the third partition of the disk image (if the previous did not do it automatically)
if ! lsblk -lo MOUNTPOINT "${LOOPD}p3" | tail -n1 | grep -q \.; then
udisksctl mount -b "${LOOPD}p3"
fi
# Note the mount point in a variable
MNTPNT="$(lsblk -lo MOUNTPOINT "${LOOPD}p3" | tail -n1)"
fi
# Extract the libs out and copy them to a compressed tar archive
ARCHIVE_NAME="widevine-flash-$(date '+%Y%m%d')_armhf.tgz"
echo "Extracting and compressing files"
tar -C"$MNTPNT" -caf "$ARCHIVE_NAME" opt/google/chrome/libwidevinecdm.so opt/google/chrome/pepper/libpepflashplayer.so --xform 's/pepper/PepperFlash/' --format ustar
echo "Created: $ARCHIVE_NAME"
# Cleanup
if [ "$USER" = "root" ]; then
umount "$MNTPNT"
losetup -d "$LOOPD"
rmdir "$MNTPNT"
else
ALLMNTS="$(lsblk -lo NAME,MOUNTPOINT "$LOOPD" | sed -n '/\//s/^\(loop[0-9]\+p[0-9]\+\).*/\1/p')"
echo "$ALLMNTS" | xargs -I{} -n1 udisksctl unmount -b /dev/{}
if [ "$LOOPD" != "$(losetup -f)" ]; then
udisksctl loop-delete -b "$LOOPD"
fi
fi
if [ "$DEL_IMG" = "N" ] || [ "${1:-EMPTY}" = "-k" ]; then
:
else
rm "$CHROMEOS_IMG_PATH/$CHROMEOS_IMG"
rmdir -v "$CHROMEOS_IMG_PATH"
fi
# Inform the user how to proceed
cat <<EOF
To install the contents of these files on an ARMhf device, copy the tar archive over to the target machine and issue the following:
sudo tar -C/ -xf $ARCHIVE_NAME
EOF
@theofficialgman
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theofficialgman commented Feb 14, 2023

@Niek lucky for use someone else has already written a tool to extract these payloads, I used https://github.com/tobyxdd/android-ota-payload-extractor

https://github.com/theofficialgman/testing/releases/download/gmans-releases/WidevineCdm.tar.gz

I can't seem to get it working though on chromium

@chexo3
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chexo3 commented Feb 15, 2023 via email

@theofficialgman
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unforuntatly it working with nothing but chromeOS right now

firstly you have this problem as described here: https://thebrokenrail.com/2022/12/31/xfinity-stream-on-linux.html#how-do-i-actually-do-this you have to patch and rebuid your system GLIBC in order to even allow the library to load (no small feat)

and then you have the problem that since arm64 widevine doesn't normally exist for linux, browsers (all of that I have found except for rpm fusion chromium-freeworld) have widevine loading disabled and don't even attempt to load it.

@chexo3
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chexo3 commented Feb 15, 2023

At this point I wonder if it'd be easier to patch the CDM itself

Or just create some sort of shim that does the same thing

Like, it might be easier to just defeat the DRM altogether.

@Botspot
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Botspot commented Feb 15, 2023

Interesting resource on how glibc was patched in PiOS: raspberrypi/Raspberry-Pi-OS-64bit#11 (comment)

@Niek
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Niek commented Feb 15, 2023

Thanks for the extracted tarball, @theofficialgman! Seems like the URL will be: https://dl.google.com/widevine-cdm/4.10.2557.0-cros-arm64.zip (404 at the time of writing).

When trying to load the library I get a symbol lookup error undefined symbol: __aarch64_ldadd4_acq_rel on Ubuntu 22.04. On Ubuntu 22.10 I get the DT_RELR without GLIBC_ABI_DT_RELR dependency error mentioned before. Instead of patching glibc, this could probably be resolved with a small LD_PRELOADed library. Ideally, the ChromeOS toolchain will update to a newer glibc version so this error won't happen in future builds.

@Botspot
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Botspot commented Feb 15, 2023

I've requested assistance from RPi developers over on this github repo: raspberrypi/Raspberry-Pi-OS-64bit#248

@theofficialgman
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Thanks for the extracted tarball, @theofficialgman! Seems like the URL will be: https://dl.google.com/widevine-cdm/4.10.2557.0-cros-arm64.zip (404 at the time of writing).

I have never seen any other chromeos (cros) links there. only windows and linux (win x64 and arm64, and linux x64)

@jollySleeper
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Thank You @teacupx @theofficialgman and all the guys involved in this thread ❤️ .
I was successfully able to run widewine needed playback on Kodi 19.4 on Arm64 with some modification to Input Stream Helper Plugin using the libwidevinecdm.so aarch64 version.

Widewine CDM on Kodi for Arm64 is a thing now.
Thanks to all of you again <3

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