Magisk/native/src/boot/main.cpp
topjohnwu b9e89a1a2d Restructure the native module
Consolidate all code into the src folder
2022-07-23 13:51:56 -07:00

210 lines
6.9 KiB
C++

#include <mincrypt/sha.h>
#include <base.hpp>
#include "magiskboot.hpp"
#include "compress.hpp"
using namespace std;
static void print_formats() {
for (int fmt = GZIP; fmt < LZOP; ++fmt) {
fprintf(stderr, "%s ", fmt2name[(format_t) fmt]);
}
}
static void usage(char *arg0) {
fprintf(stderr,
R"EOF(MagiskBoot - Boot Image Modification Tool
Usage: %s <action> [args...]
Supported actions:
unpack [-n] [-h] <bootimg>
Unpack <bootimg> to its individual components, each component to
a file with its corresponding file name in the current directory.
Supported components: kernel, kernel_dtb, ramdisk.cpio, second,
dtb, extra, and recovery_dtbo.
By default, each component will be automatically decompressed
on-the-fly before writing to the output file.
If '-n' is provided, all decompression operations will be skipped;
each component will remain untouched, dumped in its original format.
If '-h' is provided, the boot image header information will be
dumped to the file 'header', which can be used to modify header
configurations during repacking.
Return values:
0:valid 1:error 2:chromeos
repack [-n] <origbootimg> [outbootimg]
Repack boot image components using files from the current directory
to [outbootimg], or 'new-boot.img' if not specified.
<origbootimg> is the original boot image used to unpack the components.
By default, each component will be automatically compressed using its
corresponding format detected in <origbootimg>. If a component file
in the current directory is already compressed, then no addition
compression will be performed for that specific component.
If '-n' is provided, all compression operations will be skipped.
If env variable PATCHVBMETAFLAG is set to true, all disable flags in
the boot image's vbmeta header will be set.
hexpatch <file> <hexpattern1> <hexpattern2>
Search <hexpattern1> in <file>, and replace it with <hexpattern2>
cpio <incpio> [commands...]
Do cpio commands to <incpio> (modifications are done in-place)
Each command is a single argument, add quotes for each command.
Supported commands:
exists ENTRY
Return 0 if ENTRY exists, else return 1
rm [-r] ENTRY
Remove ENTRY, specify [-r] to remove recursively
mkdir MODE ENTRY
Create directory ENTRY in permissions MODE
ln TARGET ENTRY
Create a symlink to TARGET with the name ENTRY
mv SOURCE DEST
Move SOURCE to DEST
add MODE ENTRY INFILE
Add INFILE as ENTRY in permissions MODE; replaces ENTRY if exists
extract [ENTRY OUT]
Extract ENTRY to OUT, or extract all entries to current directory
test
Test the cpio's status
Return value is 0 or bitwise or-ed of following values:
0x1:Magisk 0x2:unsupported 0x4:Sony
patch
Apply ramdisk patches
Configure with env variables: KEEPVERITY KEEPFORCEENCRYPT
backup ORIG
Create ramdisk backups from ORIG
restore
Restore ramdisk from ramdisk backup stored within incpio
sha1
Print stock boot SHA1 if previously backed up in ramdisk
dtb <file> <action> [args...]
Do dtb related actions to <file>
Supported actions:
print [-f]
Print all contents of dtb for debugging
Specify [-f] to only print fstab nodes
patch
Search for fstab and remove verity/avb
Modifications are done directly to the file in-place
Configure with env variables: KEEPVERITY
test
Test the fstab's status
Return values:
0:valid 1:error
split <file>
Split image.*-dtb into kernel + kernel_dtb
sha1 <file>
Print the SHA1 checksum for <file>
cleanup
Cleanup the current working directory
compress[=format] <infile> [outfile]
Compress <infile> with [format] to [outfile].
<infile>/[outfile] can be '-' to be STDIN/STDOUT.
If [format] is not specified, then gzip will be used.
If [outfile] is not specified, then <infile> will be replaced
with another file suffixed with a matching file extension.
Supported formats: )EOF", arg0);
print_formats();
fprintf(stderr, R"EOF(
decompress <infile> [outfile]
Detect format and decompress <infile> to [outfile].
<infile>/[outfile] can be '-' to be STDIN/STDOUT.
If [outfile] is not specified, then <infile> will be replaced
with another file removing its archive format file extension.
Supported formats: )EOF");
print_formats();
fprintf(stderr, "\n\n");
exit(1);
}
int main(int argc, char *argv[]) {
cmdline_logging();
umask(0);
if (argc < 2)
usage(argv[0]);
// Skip '--' for backwards compatibility
string_view action(argv[1]);
if (str_starts(action, "--"))
action = argv[1] + 2;
if (action == "cleanup") {
fprintf(stderr, "Cleaning up...\n");
unlink(HEADER_FILE);
unlink(KERNEL_FILE);
unlink(RAMDISK_FILE);
unlink(SECOND_FILE);
unlink(KER_DTB_FILE);
unlink(EXTRA_FILE);
unlink(RECV_DTBO_FILE);
unlink(DTB_FILE);
} else if (argc > 2 && action == "sha1") {
uint8_t sha1[SHA_DIGEST_SIZE];
auto m = mmap_data(argv[2]);
SHA_hash(m.buf, m.sz, sha1);
for (uint8_t i : sha1)
printf("%02x", i);
printf("\n");
} else if (argc > 2 && action == "split") {
return split_image_dtb(argv[2]);
} else if (argc > 2 && action == "unpack") {
int idx = 2;
bool nodecomp = false;
bool hdr = false;
for (;;) {
if (idx >= argc)
usage(argv[0]);
if (argv[idx][0] != '-')
break;
for (char *flag = &argv[idx][1]; *flag; ++flag) {
if (*flag == 'n')
nodecomp = true;
else if (*flag == 'h')
hdr = true;
else
usage(argv[0]);
}
++idx;
}
return unpack(argv[idx], nodecomp, hdr);
} else if (argc > 2 && action == "repack") {
if (argv[2] == "-n"sv) {
if (argc == 3)
usage(argv[0]);
repack(argv[3], argv[4] ? argv[4] : NEW_BOOT, true);
} else {
repack(argv[2], argv[3] ? argv[3] : NEW_BOOT);
}
} else if (argc > 2 && action == "decompress") {
decompress(argv[2], argv[3]);
} else if (argc > 2 && str_starts(action, "compress")) {
compress(action[8] == '=' ? &action[9] : "gzip", argv[2], argv[3]);
} else if (argc > 4 && action == "hexpatch") {
return hexpatch(argv[2], argv[3], argv[4]);
} else if (argc > 2 && action == "cpio"sv) {
if (cpio_commands(argc - 2, argv + 2))
usage(argv[0]);
} else if (argc > 3 && action == "dtb") {
if (dtb_commands(argc - 2, argv + 2))
usage(argv[0]);
} else {
usage(argv[0]);
}
return 0;
}