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Properly support streamable input

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This commit is contained in:
topjohnwu 2023-05-26 14:07:11 -07:00
parent 659b9c6fee
commit 5b8b48ccc1
5 changed files with 239 additions and 175 deletions
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2
app/build.gradle.kts
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@ -80,7 +80,7 @@ dependencies {
implementation("dev.rikka.rikkax.recyclerview:recyclerview-ktx:1.3.1")
implementation("io.noties.markwon:core:4.6.2")
val vLibsu = "5.0.5"
val vLibsu = "5.1.0"
implementation("com.github.topjohnwu.libsu:core:${vLibsu}")
implementation("com.github.topjohnwu.libsu:service:${vLibsu}")
implementation("com.github.topjohnwu.libsu:nio:${vLibsu}")

331
app/src/main/java/com/topjohnwu/magisk/core/tasks/MagiskInstaller.kt
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@ -1,10 +1,10 @@
package com.topjohnwu.magisk.core.tasks
import android.net.Uri
import android.os.Build
import android.os.ParcelFileDescriptor
import android.system.ErrnoException
import android.system.Os
import android.system.OsConstants
import android.system.OsConstants.O_WRONLY
import android.widget.Toast
import androidx.annotation.WorkerThread
import androidx.core.os.postDelayed
@ -18,7 +18,6 @@ import com.topjohnwu.magisk.core.ktx.toast
import com.topjohnwu.magisk.core.ktx.withStreams
import com.topjohnwu.magisk.core.ktx.writeTo
import com.topjohnwu.magisk.core.utils.MediaStoreUtils
import com.topjohnwu.magisk.core.utils.MediaStoreUtils.fileDescriptor
import com.topjohnwu.magisk.core.utils.MediaStoreUtils.inputStream
import com.topjohnwu.magisk.core.utils.MediaStoreUtils.outputStream
import com.topjohnwu.magisk.core.utils.RootUtils
@ -170,151 +169,61 @@ abstract class MagiskInstallImpl protected constructor(
return true
}
private fun InputStream.cleanPump(out: OutputStream) = withStreams(this, out) { src, _ ->
src.copyTo(out)
}
private fun InputStream.copyAndClose(out: OutputStream) = out.use { copyTo(it) }
private fun newTarEntry(name: String, size: Long): TarEntry {
console.add("-- Writing: $name")
return TarEntry(TarHeader.createHeader(name, size, 0, false, 420 /* 0644 */))
}
@Throws(IOException::class)
private fun processZip(input: InputStream): ExtendedFile {
val boot = installDir.getChildFile("boot.img")
val initBoot = installDir.getChildFile("init_boot.img")
ZipInputStream(input).use { zipIn ->
lateinit var entry: ZipEntry
while (zipIn.nextEntry?.also { entry = it } != null) {
if (entry.isDirectory) continue
when (entry.name.substringAfterLast('/')) {
"payload.bin" -> {
console.add("- Extracting payload")
val dest = File(installDir, "payload.bin")
FileOutputStream(dest).use { zipIn.copyTo(it) }
try {
return processPayload(Uri.fromFile(dest))
} catch (e: IOException) {
// No boot image in payload.bin, continue to find boot images
}
}
"init_boot.img" -> {
console.add("- Extracting init_boot image")
initBoot.newOutputStream().use { zipIn.copyTo(it) }
return initBoot
}
"boot.img" -> {
console.add("- Extracting boot image")
boot.newOutputStream().use { zipIn.copyTo(it) }
// no break here since there might be an init_boot.img
}
}
}
}
if (boot.exists()) {
return boot
} else {
console.add("! No boot image found")
throw IOException()
}
private class LZ4InputStream(s: InputStream) : LZ4FrameInputStream(s) {
// Workaround bug in LZ4FrameInputStream
override fun available() = 0
}
@Throws(IOException::class)
@Synchronized
private fun processPayload(input: Uri): ExtendedFile {
if (Build.VERSION.SDK_INT < Build.VERSION_CODES.O) {
throw IOException("Payload is only supported on Android Oreo or above")
}
try {
console.add("- Processing payload.bin")
console.add("-- Extracting boot.img")
input.fileDescriptor("r").use { fd ->
val bk = ParcelFileDescriptor.fromFd(0)
try {
Os.dup2(fd.fileDescriptor, 0)
val process = ProcessBuilder()
.redirectInput(ProcessBuilder.Redirect.INHERIT)
.command(
"$installDir/magiskboot",
"extract",
"-"
)
.start()
if (process.waitFor() != 0) {
throw IOException(
"magiskboot extract failed with code ${
process.errorStream.readBytes().toString(Charsets.UTF_8)
}"
)
}
} finally {
Os.dup2(bk.fileDescriptor, 0)
}
}
val boot = installDir.getChildFile("boot.img")
val initBoot = installDir.getChildFile("init_boot.img")
return when {
initBoot.exists() -> initBoot
boot.exists() -> boot
else -> {
console.add("! No boot image found")
throw IOException()
}
}
} catch (e: ErrnoException) {
throw IOException(e)
}
}
private class NoBootException : IOException()
@Throws(IOException::class)
private fun processTar(input: InputStream, output: OutputStream): OutputStream {
private fun processTar(tarIn: TarInputStream, tarOut: TarOutputStream): ExtendedFile {
console.add("- Processing tar file")
val tarOut = TarOutputStream(output)
TarInputStream(input).use { tarIn ->
lateinit var entry: TarEntry
lateinit var entry: TarEntry
fun decompressedStream(): InputStream {
val src = if (entry.name.endsWith(".lz4")) LZ4FrameInputStream(tarIn) else tarIn
return object : FilterInputStream(src) {
override fun available() = 0 /* Workaround bug in LZ4FrameInputStream */
override fun close() { /* Never close src stream */ }
}
}
fun decompressedStream(): InputStream {
return if (entry.name.endsWith(".lz4")) LZ4InputStream(tarIn) else tarIn
}
while (tarIn.nextEntry?.let { entry = it } != null) {
if (entry.name.startsWith("boot.img") ||
entry.name.startsWith("init_boot.img") ||
(Config.recovery && entry.name.contains("recovery.img"))) {
val name = entry.name.replace(".lz4", "")
console.add("-- Extracting: $name")
while (tarIn.nextEntry?.let { entry = it } != null) {
if (entry.name.startsWith("boot.img") ||
entry.name.startsWith("init_boot.img") ||
(Config.recovery && entry.name.contains("recovery.img"))) {
val name = entry.name.replace(".lz4", "")
console.add("-- Extracting: $name")
val extract = installDir.getChildFile(name)
decompressedStream().cleanPump(extract.newOutputStream())
} else if (entry.name.contains("vbmeta.img")) {
val rawData = decompressedStream().readBytes()
// Valid vbmeta.img should be at least 256 bytes
if (rawData.size < 256)
continue
val extract = installDir.getChildFile(name)
decompressedStream().copyAndClose(extract.newOutputStream())
} else if (entry.name.contains("vbmeta.img")) {
val rawData = decompressedStream().readBytes()
// Valid vbmeta.img should be at least 256 bytes
if (rawData.size < 256)
continue
// Patch flags to AVB_VBMETA_IMAGE_FLAGS_HASHTREE_DISABLED |
// AVB_VBMETA_IMAGE_FLAGS_VERIFICATION_DISABLED
console.add("-- Patching: vbmeta.img")
ByteBuffer.wrap(rawData).putInt(120, 3)
tarOut.putNextEntry(newTarEntry("vbmeta.img", rawData.size.toLong()))
tarOut.write(rawData)
} else {
console.add("-- Copying: ${entry.name}")
tarOut.putNextEntry(entry)
tarIn.copyTo(tarOut, bufferSize = 1024 * 1024)
}
// Patch flags to AVB_VBMETA_IMAGE_FLAGS_HASHTREE_DISABLED |
// AVB_VBMETA_IMAGE_FLAGS_VERIFICATION_DISABLED
console.add("-- Patching: vbmeta.img")
ByteBuffer.wrap(rawData).putInt(120, 3)
tarOut.putNextEntry(newTarEntry("vbmeta.img", rawData.size.toLong()))
tarOut.write(rawData)
} else {
console.add("-- Copying: ${entry.name}")
tarOut.putNextEntry(entry)
tarIn.copyTo(tarOut, bufferSize = 1024 * 1024)
}
}
val boot = installDir.getChildFile("boot.img")
val initBoot = installDir.getChildFile("init_boot.img")
val recovery = installDir.getChildFile("recovery.img")
if (Config.recovery && recovery.exists() && boot.exists()) {
// Install to recovery
srcBoot = recovery
// Repack boot image to prevent auto restore
arrayOf(
"cd $installDir",
@ -330,31 +239,130 @@ abstract class MagiskInstallImpl protected constructor(
it.copyTo(tarOut)
}
boot.delete()
// Install to recovery
return recovery
} else {
srcBoot = when {
return when {
initBoot.exists() -> initBoot
boot.exists() -> boot
else -> {
console.add("! No boot image found")
throw IOException()
throw NoBootException()
}
}
}
return tarOut
}
@Throws(IOException::class)
private fun processZip(zipIn: ZipInputStream): ExtendedFile {
console.add("- Processing zip file")
val boot = installDir.getChildFile("boot.img")
val initBoot = installDir.getChildFile("init_boot.img")
lateinit var entry: ZipEntry
while (zipIn.nextEntry?.also { entry = it } != null) {
if (entry.isDirectory) continue
when (entry.name.substringAfterLast('/')) {
"payload.bin" -> {
try {
return processPayload(zipIn)
} catch (e: IOException) {
// No boot image in payload.bin, continue to find boot images
}
}
"init_boot.img" -> {
console.add("- Extracting init_boot.img")
zipIn.copyAndClose(initBoot.newOutputStream())
return initBoot
}
"boot.img" -> {
console.add("- Extracting boot.img")
zipIn.copyAndClose(boot.newOutputStream())
// Don't return here since there might be an init_boot.img
}
}
}
if (boot.exists()) {
return boot
} else {
throw NoBootException()
}
}
@Throws(IOException::class)
private fun processPayload(input: InputStream): ExtendedFile {
var fifo: File? = null
try {
console.add("- Processing payload.bin")
fifo = File.createTempFile("payload-fifo-", null, installDir)
fifo.delete()
Os.mkfifo(fifo.path, 420 /* 0644 */)
// Enqueue the shell command first, or the subsequent FIFO open will block
val future = arrayOf(
"cd $installDir",
"./magiskboot extract $fifo",
"cd /"
).eq()
val fd = Os.open(fifo.path, O_WRONLY, 0)
try {
val buf = ByteBuffer.allocate(1024 * 1024)
buf.position(input.read(buf.array()).coerceAtLeast(0)).flip()
while (buf.hasRemaining()) {
try {
Os.write(fd, buf)
} catch (e: ErrnoException) {
if (e.errno != OsConstants.EPIPE)
throw e
// If SIGPIPE, then the other side is closed, we're done
break
}
if (!buf.hasRemaining()) {
buf.position(input.read(buf.array()).coerceAtLeast(0)).flip()
}
}
} finally {
Os.close(fd)
}
val success = try { future.get().isSuccess } catch (e: Exception) { false }
if (!success) {
console.add("! Error while extracting payload.bin")
throw IOException()
}
val boot = installDir.getChildFile("boot.img")
val initBoot = installDir.getChildFile("init_boot.img")
return when {
initBoot.exists() -> {
console.add("-- Extract init_boot.img")
initBoot
}
boot.exists() -> {
console.add("-- Extract boot.img")
boot
}
else -> {
throw NoBootException()
}
}
} catch (e: ErrnoException) {
throw IOException(e)
} finally {
fifo?.delete()
}
}
private fun handleFile(uri: Uri): Boolean {
val outStream: OutputStream
var outFile: MediaStoreUtils.UriFile? = null
val outFile: MediaStoreUtils.UriFile
// Process input file
try {
uri.inputStream().buffered().use { src ->
src.mark(500)
val magic = ByteArray(5)
val headMagic = ByteArray(4)
if (src.read(headMagic) != headMagic.size || src.skip(253) != 253L ||
src.read(magic) != magic.size
val magic = ByteArray(4)
val tarMagic = ByteArray(5)
if (src.read(magic) != magic.size || src.skip(253) != 253L ||
src.read(tarMagic) != tarMagic.size
) {
console.add("! Invalid input file")
return false
@ -371,36 +379,52 @@ abstract class MagiskInstallImpl protected constructor(
toString()
}
outStream = if (magic.contentEquals("ustar".toByteArray())) {
srcBoot = if (tarMagic.contentEquals("ustar".toByteArray())) {
// tar file
outFile = MediaStoreUtils.getFile("$filename.tar", true)
processTar(src, outFile!!.uri.outputStream())
} else {
srcBoot = if (headMagic.contentEquals("CrAU".toByteArray())) {
processPayload(uri)
} else if (headMagic.contentEquals("PK\u0003\u0004".toByteArray())) {
processZip(src)
} else {
val boot = installDir.getChildFile("boot.img")
console.add("- Copying image to cache")
src.cleanPump(boot.newOutputStream())
boot
outStream = TarOutputStream(outFile.uri.outputStream())
try {
processTar(TarInputStream(src), outStream)
} catch (e: IOException) {
outStream.close()
outFile.delete()
throw e
}
} else {
// raw image
outFile = MediaStoreUtils.getFile("$filename.img", true)
outFile!!.uri.outputStream()
outStream = outFile.uri.outputStream()
try {
if (magic.contentEquals("CrAU".toByteArray())) {
processPayload(src)
} else if (magic.contentEquals("PK\u0003\u0004".toByteArray())) {
processZip(ZipInputStream(src))
} else {
console.add("- Copying image to cache")
installDir.getChildFile("boot.img").also {
src.copyAndClose(it.newOutputStream())
}
}
} catch (e: IOException) {
outStream.close()
outFile.delete()
throw e
}
}
}
} catch (e: IOException) {
if (e is NoBootException)
console.add("! No boot image found")
console.add("! Process error")
outFile?.delete()
Timber.e(e)
return false
}
// Patch file
if (!patchBoot()) {
outFile!!.delete()
outFile.delete()
return false
}
@ -417,7 +441,7 @@ abstract class MagiskInstallImpl protected constructor(
}
outStream.putNextEntry(newTarEntry(name, newBoot.length()))
}
newBoot.newInputStream().cleanPump(outStream)
newBoot.newInputStream().copyAndClose(outStream)
newBoot.delete()
console.add("")
@ -427,7 +451,7 @@ abstract class MagiskInstallImpl protected constructor(
console.add("****************************")
} catch (e: IOException) {
console.add("! Failed to output to $outFile")
outFile!!.delete()
outFile.delete()
Timber.e(e)
return false
}
@ -516,6 +540,7 @@ abstract class MagiskInstallImpl protected constructor(
return true
}
private fun Array<String>.eq() = shell.newJob().add(*this).to(console, logs).enqueue()
private fun String.sh() = shell.newJob().add(this).to(console, logs).exec()
private fun Array<String>.sh() = shell.newJob().add(*this).to(console, logs).exec()
private fun String.fsh() = ShellUtils.fastCmd(shell, this)

36
native/src/base/files.rs
View File

@ -1,8 +1,9 @@
use mem::MaybeUninit;
use std::cmp::min;
use std::ffi::CStr;
use std::io;
use std::io::{BufRead, Write};
use std::io::{BufRead, Read, Seek, SeekFrom, Write};
use std::os::unix::io::{AsRawFd, FromRawFd, OwnedFd, RawFd};
use std::{io, mem};
use libc::{c_char, c_uint, mode_t, EEXIST, ENOENT, O_CLOEXEC, O_PATH};
@ -135,6 +136,37 @@ pub extern "C" fn mkdirs(path: *const c_char, mode: mode_t) -> i32 {
}
}
pub trait ReadExt {
fn skip(&mut self, len: usize) -> io::Result<()>;
}
impl<T: Read> ReadExt for T {
fn skip(&mut self, mut len: usize) -> io::Result<()> {
let mut buf = MaybeUninit::<[u8; 4096]>::uninit();
let buf = unsafe { buf.assume_init_mut() };
while len > 0 {
let l = min(buf.len(), len);
self.read_exact(&mut buf[..l])?;
len -= l;
}
Ok(())
}
}
pub trait ReadSeekExt {
fn skip(&mut self, len: usize) -> io::Result<()>;
}
impl<T: Read + Seek> ReadSeekExt for T {
fn skip(&mut self, len: usize) -> io::Result<()> {
if self.seek(SeekFrom::Current(len as i64)).is_err() {
// If the file is not actually seekable, fallback to read
ReadExt::skip(self, len)?;
}
Ok(())
}
}
pub trait BufReadExt {
fn foreach_lines<F: FnMut(&mut String) -> bool>(&mut self, f: F);
fn foreach_props<F: FnMut(&str, &str) -> bool>(&mut self, f: F);

2
native/src/boot/main.cpp
View File

@ -51,7 +51,7 @@ Supported actions:
If [partition] is not specified, then attempt to extract either
'init_boot' or 'boot'. Which partition was chosen can be determined
by whichever 'init_boot.img' or 'boot.img' exists.
<payload.bin>/[outfile] can be '-' to be STDIN/STDOUT.
<payload.bin> can be '-' to be STDIN.
hexpatch <file> <hexpattern1> <hexpattern2>
Search <hexpattern1> in <file>, and replace it with <hexpattern2>

43
native/src/boot/payload.rs
View File

@ -7,7 +7,7 @@ use byteorder::{BigEndian, ReadBytesExt};
use protobuf::{EnumFull, Message};
use base::libc::c_char;
use base::{ptr_to_str_result, StrErr};
use base::{ptr_to_str_result, ReadSeekExt, StrErr};
use base::{ResultExt, WriteExt};
use crate::ffi;
@ -27,7 +27,7 @@ const PAYLOAD_MAGIC: &str = "CrAU";
fn do_extract_boot_from_payload(
in_path: &str,
partition: Option<&str>,
partition_name: Option<&str>,
out_path: Option<&str>,
) -> anyhow::Result<()> {
let mut reader = BufReader::new(if in_path == "-" {
@ -74,46 +74,50 @@ fn do_extract_boot_from_payload(
let block_size = manifest.block_size() as u64;
let part = match partition {
let partition = match partition_name {
None => {
let boot = manifest
.partitions
.iter()
.find(|partition| partition.partition_name() == "init_boot");
.find(|p| p.partition_name() == "init_boot");
let boot = match boot {
Some(boot) => Some(boot),
None => manifest
.partitions
.iter()
.find(|partition| partition.partition_name() == "boot"),
.find(|p| p.partition_name() == "boot"),
};
boot.ok_or(anyhow!("boot partition not found"))?
}
Some(partition) => manifest
Some(name) => manifest
.partitions
.iter()
.find(|p| p.partition_name() == partition)
.ok_or(anyhow!("partition '{partition}' not found"))?,
.find(|p| p.partition_name() == name)
.ok_or(anyhow!("partition '{name}' not found"))?,
};
let out_str: String;
let out_path = match out_path {
None => {
out_str = format!("{}.img", part.partition_name());
out_str = format!("{}.img", partition.partition_name());
out_str.as_str()
}
Some(p) => p,
Some(s) => s,
};
let mut out_file = if out_path == "-" {
unsafe { File::from_raw_fd(1) }
} else {
File::create(out_path).with_context(|| format!("cannot write to '{out_path}'"))?
};
let mut out_file =
File::create(out_path).with_context(|| format!("cannot write to '{out_path}'"))?;
let base_offset = reader.stream_position()? + manifest_sig_len as u64;
// Skip the manifest signature
reader.skip(manifest_sig_len as usize)?;
for operation in part.operations.iter() {
// Sort the install operations with data_offset so we will only ever need to seek forward
// This makes it possible to support non-seekable input file descriptors
let mut operations = partition.operations.clone();
operations.sort_by_key(|e| e.data_offset.unwrap_or(0));
let mut curr_data_offset: u64 = 0;
for operation in operations.iter() {
let data_len = operation
.data_length
.ok_or(bad_payload!("data length not found"))? as usize;
@ -131,8 +135,11 @@ fn do_extract_boot_from_payload(
buf.resize(data_len, 0u8);
let data = &mut buf[..data_len];
reader.seek(SeekFrom::Start(base_offset + data_offset))?;
// Skip to the next offset and read data
let skip = data_offset - curr_data_offset;
reader.skip(skip as usize)?;
reader.read_exact(data)?;
curr_data_offset = data_offset + data_len as u64;
let out_offset = operation
.dst_extents