mirror of
https://github.com/topjohnwu/Magisk.git
synced 2024-12-04 23:45:23 +00:00
536 lines
12 KiB
C++
536 lines
12 KiB
C++
#include <unistd.h>
|
|
#include <fcntl.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <sys/mman.h>
|
|
#include <memory>
|
|
#include <functional>
|
|
|
|
#include <logging.h>
|
|
#include <utils.h>
|
|
|
|
#include "magiskboot.h"
|
|
#include "compress.h"
|
|
|
|
using namespace std;
|
|
|
|
static bool read_file(FILE *fp, const function<void (void *, size_t)> &fn) {
|
|
char buf[4096];
|
|
size_t len;
|
|
while ((len = fread(buf, 1, sizeof(buf), fp)))
|
|
fn(buf, len);
|
|
return true;
|
|
}
|
|
|
|
void decompress(char *infile, const char *outfile) {
|
|
bool in_std = strcmp(infile, "-") == 0;
|
|
bool rm_in = false;
|
|
|
|
FILE *in_file = in_std ? stdin : xfopen(infile, "re");
|
|
int out_fd = -1;
|
|
unique_ptr<Compression> cmp;
|
|
|
|
read_file(in_file, [&](void *buf, size_t len) -> void {
|
|
if (out_fd < 0) {
|
|
format_t type = check_fmt(buf, len);
|
|
if (!COMPRESSED(type))
|
|
LOGE("Input file is not a compressed type!\n");
|
|
|
|
cmp.reset(get_decoder(type));
|
|
fprintf(stderr, "Detected format: [%s]\n", fmt2name[type]);
|
|
|
|
/* If user does not provide outfile, infile has to be either
|
|
* <path>.[ext], or '-'. Outfile will be either <path> or '-'.
|
|
* If the input does not have proper format, abort */
|
|
|
|
char *ext = nullptr;
|
|
if (outfile == nullptr) {
|
|
outfile = infile;
|
|
if (!in_std) {
|
|
ext = strrchr(infile, '.');
|
|
if (ext == nullptr || strcmp(ext, fmt2ext[type]) != 0)
|
|
LOGE("Input file is not a supported type!\n");
|
|
|
|
// Strip out extension and remove input
|
|
*ext = '\0';
|
|
rm_in = true;
|
|
fprintf(stderr, "Decompressing to [%s]\n", outfile);
|
|
}
|
|
}
|
|
|
|
out_fd = strcmp(outfile, "-") == 0 ?
|
|
STDOUT_FILENO : xopen(outfile, O_WRONLY | O_CREAT | O_TRUNC, 0644);
|
|
cmp->set_out(make_unique<FDOutStream>(out_fd));
|
|
if (ext) *ext = '.';
|
|
}
|
|
if (!cmp->write(buf, len))
|
|
LOGE("Decompression error!\n");
|
|
});
|
|
|
|
cmp->finalize();
|
|
fclose(in_file);
|
|
close(out_fd);
|
|
|
|
if (rm_in)
|
|
unlink(infile);
|
|
}
|
|
|
|
void compress(const char *method, const char *infile, const char *outfile) {
|
|
auto it = name2fmt.find(method);
|
|
if (it == name2fmt.end())
|
|
LOGE("Unsupported compression method: [%s]\n", method);
|
|
|
|
unique_ptr<Compression> cmp(get_encoder(it->second));
|
|
|
|
bool in_std = strcmp(infile, "-") == 0;
|
|
bool rm_in = false;
|
|
|
|
FILE *in_file = in_std ? stdin : xfopen(infile, "re");
|
|
int out_fd;
|
|
|
|
if (outfile == nullptr) {
|
|
if (in_std) {
|
|
out_fd = STDOUT_FILENO;
|
|
} else {
|
|
/* If user does not provide outfile and infile is not
|
|
* STDIN, output to <infile>.[ext] */
|
|
char *tmp = new char[strlen(infile) + 5];
|
|
sprintf(tmp, "%s%s", infile, fmt2ext[it->second]);
|
|
out_fd = xopen(tmp, O_WRONLY | O_CREAT | O_TRUNC, 0644);
|
|
fprintf(stderr, "Compressing to [%s]\n", tmp);
|
|
delete[] tmp;
|
|
rm_in = true;
|
|
}
|
|
} else {
|
|
out_fd = strcmp(outfile, "-") == 0 ?
|
|
STDOUT_FILENO : xopen(outfile, O_WRONLY | O_CREAT | O_TRUNC, 0644);
|
|
}
|
|
|
|
cmp->set_out(make_unique<FDOutStream>(out_fd));
|
|
|
|
read_file(in_file, [&](void *buf, size_t len) -> void {
|
|
if (!cmp->write(buf, len))
|
|
LOGE("Compression error!\n");
|
|
});
|
|
|
|
cmp->finalize();
|
|
fclose(in_file);
|
|
close(out_fd);
|
|
|
|
if (rm_in)
|
|
unlink(infile);
|
|
}
|
|
|
|
Compression *get_encoder(format_t type) {
|
|
switch (type) {
|
|
case XZ:
|
|
return new XZEncoder();
|
|
case LZMA:
|
|
return new LZMAEncoder();
|
|
case BZIP2:
|
|
return new BZEncoder();
|
|
case LZ4:
|
|
return new LZ4FEncoder();
|
|
case LZ4_LEGACY:
|
|
return new LZ4Encoder();
|
|
case GZIP:
|
|
default:
|
|
return new GZEncoder();
|
|
}
|
|
}
|
|
|
|
Compression *get_decoder(format_t type) {
|
|
switch (type) {
|
|
case XZ:
|
|
case LZMA:
|
|
return new LZMADecoder();
|
|
case BZIP2:
|
|
return new BZDecoder();
|
|
case LZ4:
|
|
return new LZ4FDecoder();
|
|
case LZ4_LEGACY:
|
|
return new LZ4Decoder();
|
|
case GZIP:
|
|
default:
|
|
return new GZDecoder();
|
|
}
|
|
}
|
|
|
|
GZStream::GZStream(int mode) : mode(mode), strm({}) {
|
|
switch(mode) {
|
|
case 0:
|
|
inflateInit2(&strm, 15 | 16);
|
|
break;
|
|
case 1:
|
|
deflateInit2(&strm, 9, Z_DEFLATED, 15 | 16, 8, Z_DEFAULT_STRATEGY);
|
|
break;
|
|
}
|
|
}
|
|
|
|
bool GZStream::write(const void *in, size_t size) {
|
|
return size ? write(in, size, Z_NO_FLUSH) : true;
|
|
}
|
|
|
|
uint64_t GZStream::finalize() {
|
|
write(nullptr, 0, Z_FINISH);
|
|
uint64_t total = strm.total_out;
|
|
switch(mode) {
|
|
case 0:
|
|
inflateEnd(&strm);
|
|
break;
|
|
case 1:
|
|
deflateEnd(&strm);
|
|
break;
|
|
}
|
|
return total;
|
|
}
|
|
|
|
bool GZStream::write(const void *in, size_t size, int flush) {
|
|
int ret;
|
|
strm.next_in = (Bytef *) in;
|
|
strm.avail_in = size;
|
|
do {
|
|
strm.next_out = outbuf;
|
|
strm.avail_out = sizeof(outbuf);
|
|
switch(mode) {
|
|
case 0:
|
|
ret = inflate(&strm, flush);
|
|
break;
|
|
case 1:
|
|
ret = deflate(&strm, flush);
|
|
break;
|
|
}
|
|
if (ret == Z_STREAM_ERROR) {
|
|
LOGW("Gzip %s failed (%d)\n", mode ? "encode" : "decode", ret);
|
|
return false;
|
|
}
|
|
FilterOutStream::write(outbuf, sizeof(outbuf) - strm.avail_out);
|
|
} while (strm.avail_out == 0);
|
|
return true;
|
|
}
|
|
|
|
BZStream::BZStream(int mode) : mode(mode), strm({}) {
|
|
switch(mode) {
|
|
case 0:
|
|
BZ2_bzDecompressInit(&strm, 0, 0);
|
|
break;
|
|
case 1:
|
|
BZ2_bzCompressInit(&strm, 9, 0, 0);
|
|
break;
|
|
}
|
|
}
|
|
|
|
bool BZStream::write(const void *in, size_t size) {
|
|
return size ? write(in, size, BZ_RUN) : true;
|
|
}
|
|
|
|
uint64_t BZStream::finalize() {
|
|
if (mode)
|
|
write(nullptr, 0, BZ_FINISH);
|
|
uint64_t total = ((uint64_t) strm.total_out_hi32 << 32) + strm.total_out_lo32;
|
|
switch(mode) {
|
|
case 0:
|
|
BZ2_bzDecompressEnd(&strm);
|
|
break;
|
|
case 1:
|
|
BZ2_bzCompressEnd(&strm);
|
|
break;
|
|
}
|
|
return total;
|
|
}
|
|
|
|
bool BZStream::write(const void *in, size_t size, int flush) {
|
|
int ret;
|
|
strm.next_in = (char *) in;
|
|
strm.avail_in = size;
|
|
do {
|
|
strm.avail_out = sizeof(outbuf);
|
|
strm.next_out = outbuf;
|
|
switch(mode) {
|
|
case 0:
|
|
ret = BZ2_bzDecompress(&strm);
|
|
break;
|
|
case 1:
|
|
ret = BZ2_bzCompress(&strm, flush);
|
|
break;
|
|
}
|
|
if (ret < 0) {
|
|
LOGW("Bzip2 %s failed (%d)\n", mode ? "encode" : "decode", ret);
|
|
return false;
|
|
}
|
|
FilterOutStream::write(outbuf, sizeof(outbuf) - strm.avail_out);
|
|
} while (strm.avail_out == 0);
|
|
return true;
|
|
}
|
|
|
|
LZMAStream::LZMAStream(int mode) : mode(mode), strm(LZMA_STREAM_INIT) {
|
|
lzma_options_lzma opt;
|
|
int ret;
|
|
|
|
// Initialize preset
|
|
lzma_lzma_preset(&opt, 9);
|
|
lzma_filter filters[] = {
|
|
{ .id = LZMA_FILTER_LZMA2, .options = &opt },
|
|
{ .id = LZMA_VLI_UNKNOWN, .options = nullptr },
|
|
};
|
|
|
|
switch(mode) {
|
|
case 0:
|
|
ret = lzma_auto_decoder(&strm, UINT64_MAX, 0);
|
|
break;
|
|
case 1:
|
|
ret = lzma_stream_encoder(&strm, filters, LZMA_CHECK_CRC32);
|
|
break;
|
|
case 2:
|
|
ret = lzma_alone_encoder(&strm, &opt);
|
|
break;
|
|
}
|
|
}
|
|
|
|
bool LZMAStream::write(const void *in, size_t size) {
|
|
return size ? write(in, size, LZMA_RUN) : true;
|
|
}
|
|
|
|
uint64_t LZMAStream::finalize() {
|
|
write(nullptr, 0, LZMA_FINISH);
|
|
uint64_t total = strm.total_out;
|
|
lzma_end(&strm);
|
|
return total;
|
|
}
|
|
|
|
bool LZMAStream::write(const void *in, size_t size, lzma_action flush) {
|
|
int ret;
|
|
strm.next_in = (uint8_t *) in;
|
|
strm.avail_in = size;
|
|
do {
|
|
strm.avail_out = sizeof(outbuf);
|
|
strm.next_out = outbuf;
|
|
ret = lzma_code(&strm, flush);
|
|
if (ret != LZMA_OK && ret != LZMA_STREAM_END) {
|
|
LOGW("LZMA %s failed (%d)\n", mode ? "encode" : "decode", ret);
|
|
return false;
|
|
}
|
|
FilterOutStream::write(outbuf, sizeof(outbuf) - strm.avail_out);
|
|
} while (strm.avail_out == 0);
|
|
return true;
|
|
}
|
|
|
|
LZ4FDecoder::LZ4FDecoder() : outbuf(nullptr), total(0) {
|
|
LZ4F_createDecompressionContext(&ctx, LZ4F_VERSION);
|
|
}
|
|
|
|
LZ4FDecoder::~LZ4FDecoder() {
|
|
LZ4F_freeDecompressionContext(ctx);
|
|
delete[] outbuf;
|
|
}
|
|
|
|
bool LZ4FDecoder::write(const void *in, size_t size) {
|
|
auto inbuf = (const uint8_t *) in;
|
|
if (!outbuf)
|
|
read_header(inbuf, size);
|
|
size_t read, write;
|
|
LZ4F_errorCode_t ret;
|
|
do {
|
|
read = size;
|
|
write = outCapacity;
|
|
ret = LZ4F_decompress(ctx, outbuf, &write, inbuf, &read, nullptr);
|
|
if (LZ4F_isError(ret)) {
|
|
LOGW("LZ4 decode error: %s\n", LZ4F_getErrorName(ret));
|
|
return false;
|
|
}
|
|
size -= read;
|
|
inbuf += read;
|
|
total += write;
|
|
FilterOutStream::write(outbuf, write);
|
|
} while (size != 0 || write != 0);
|
|
return true;
|
|
}
|
|
|
|
uint64_t LZ4FDecoder::finalize() {
|
|
return total;
|
|
}
|
|
|
|
void LZ4FDecoder::read_header(const uint8_t *&in, size_t &size) {
|
|
size_t read = size;
|
|
LZ4F_frameInfo_t info;
|
|
LZ4F_getFrameInfo(ctx, &info, in, &read);
|
|
switch (info.blockSizeID) {
|
|
case LZ4F_default:
|
|
case LZ4F_max64KB: outCapacity = 1 << 16; break;
|
|
case LZ4F_max256KB: outCapacity = 1 << 18; break;
|
|
case LZ4F_max1MB: outCapacity = 1 << 20; break;
|
|
case LZ4F_max4MB: outCapacity = 1 << 22; break;
|
|
}
|
|
outbuf = new uint8_t[outCapacity];
|
|
in += read;
|
|
size -= read;
|
|
}
|
|
|
|
LZ4FEncoder::LZ4FEncoder() : outbuf(nullptr), outCapacity(0), total(0) {
|
|
LZ4F_createCompressionContext(&ctx, LZ4F_VERSION);
|
|
}
|
|
|
|
LZ4FEncoder::~LZ4FEncoder() {
|
|
LZ4F_freeCompressionContext(ctx);
|
|
delete[] outbuf;
|
|
}
|
|
|
|
bool LZ4FEncoder::write(const void *in, size_t size) {
|
|
if (!outbuf)
|
|
write_header();
|
|
if (size == 0)
|
|
return true;
|
|
auto inbuf = (const uint8_t *) in;
|
|
size_t read, write;
|
|
do {
|
|
read = size > BLOCK_SZ ? BLOCK_SZ : size;
|
|
write = LZ4F_compressUpdate(ctx, outbuf, outCapacity, inbuf, read, nullptr);
|
|
if (LZ4F_isError(write)) {
|
|
LOGW("LZ4 encode error: %s\n", LZ4F_getErrorName(write));
|
|
return false;
|
|
}
|
|
size -= read;
|
|
inbuf += read;
|
|
total += write;
|
|
FilterOutStream::write(outbuf, write);
|
|
} while (size != 0);
|
|
return true;
|
|
}
|
|
|
|
uint64_t LZ4FEncoder::finalize() {
|
|
size_t write = LZ4F_compressEnd(ctx, outbuf, outCapacity, nullptr);
|
|
total += write;
|
|
FilterOutStream::write(outbuf, write);
|
|
return total;
|
|
}
|
|
|
|
void LZ4FEncoder::write_header() {
|
|
LZ4F_preferences_t prefs {
|
|
.autoFlush = 1,
|
|
.compressionLevel = 9,
|
|
.frameInfo = {
|
|
.blockMode = LZ4F_blockIndependent,
|
|
.blockSizeID = LZ4F_max4MB,
|
|
.blockChecksumFlag = LZ4F_noBlockChecksum,
|
|
.contentChecksumFlag = LZ4F_contentChecksumEnabled
|
|
}
|
|
};
|
|
outCapacity = LZ4F_compressBound(BLOCK_SZ, &prefs);
|
|
outbuf = new uint8_t[outCapacity];
|
|
size_t write = LZ4F_compressBegin(ctx, outbuf, outCapacity, &prefs);
|
|
total += write;
|
|
FilterOutStream::write(outbuf, write);
|
|
}
|
|
|
|
LZ4Decoder::LZ4Decoder() : init(false), buf_off(0), total(0), block_sz(0),
|
|
outbuf(new char[LZ4_UNCOMPRESSED]), buf(new char[LZ4_COMPRESSED]) {}
|
|
|
|
LZ4Decoder::~LZ4Decoder() {
|
|
delete[] outbuf;
|
|
delete[] buf;
|
|
}
|
|
|
|
bool LZ4Decoder::write(const void *in, size_t size) {
|
|
const char *inbuf = (const char *) in;
|
|
if (!init) {
|
|
// Skip magic
|
|
inbuf += 4;
|
|
size -= 4;
|
|
init = true;
|
|
}
|
|
int write;
|
|
size_t consumed;
|
|
do {
|
|
if (block_sz == 0) {
|
|
block_sz = *((unsigned *) inbuf);
|
|
inbuf += sizeof(unsigned);
|
|
size -= sizeof(unsigned);
|
|
} else if (buf_off + size >= block_sz) {
|
|
consumed = block_sz - buf_off;
|
|
memcpy(buf + buf_off, inbuf, consumed);
|
|
inbuf += consumed;
|
|
size -= consumed;
|
|
|
|
write = LZ4_decompress_safe(buf, outbuf, block_sz, LZ4_UNCOMPRESSED);
|
|
if (write < 0) {
|
|
LOGW("LZ4HC decompression failure (%d)\n", write);
|
|
return false;
|
|
}
|
|
FilterOutStream::write(outbuf, write);
|
|
total += write;
|
|
|
|
// Reset
|
|
buf_off = 0;
|
|
block_sz = 0;
|
|
} else {
|
|
// Copy to internal buffer
|
|
memcpy(buf + buf_off, inbuf, size);
|
|
buf_off += size;
|
|
size = 0;
|
|
}
|
|
} while (size != 0);
|
|
return true;
|
|
}
|
|
|
|
uint64_t LZ4Decoder::finalize() {
|
|
return total;
|
|
}
|
|
|
|
LZ4Encoder::LZ4Encoder() : init(false), buf_off(0), out_total(0), in_total(0),
|
|
outbuf(new char[LZ4_COMPRESSED]), buf(new char[LZ4_UNCOMPRESSED]) {}
|
|
|
|
LZ4Encoder::~LZ4Encoder() {
|
|
delete[] outbuf;
|
|
delete[] buf;
|
|
}
|
|
|
|
bool LZ4Encoder::write(const void *in, size_t size) {
|
|
if (!init) {
|
|
FilterOutStream::write("\x02\x21\x4c\x18", 4);
|
|
init = true;
|
|
}
|
|
if (size == 0)
|
|
return true;
|
|
in_total += size;
|
|
const char *inbuf = (const char *) in;
|
|
size_t consumed;
|
|
int write;
|
|
do {
|
|
if (buf_off + size >= LZ4_UNCOMPRESSED) {
|
|
consumed = LZ4_UNCOMPRESSED - buf_off;
|
|
memcpy(buf + buf_off, inbuf, consumed);
|
|
inbuf += consumed;
|
|
size -= consumed;
|
|
|
|
write = LZ4_compress_HC(buf, outbuf, LZ4_UNCOMPRESSED, LZ4_COMPRESSED, 9);
|
|
if (write == 0) {
|
|
LOGW("LZ4HC compression failure\n");
|
|
return false;
|
|
}
|
|
FilterOutStream::write(&write, sizeof(write));
|
|
FilterOutStream::write(outbuf, write);
|
|
out_total += write + sizeof(write);
|
|
|
|
// Reset buffer
|
|
buf_off = 0;
|
|
} else {
|
|
// Copy to internal buffer
|
|
memcpy(buf + buf_off, inbuf, size);
|
|
buf_off += size;
|
|
size = 0;
|
|
}
|
|
} while (size != 0);
|
|
return true;
|
|
}
|
|
|
|
uint64_t LZ4Encoder::finalize() {
|
|
if (buf_off) {
|
|
int write = LZ4_compress_HC(buf, outbuf, buf_off, LZ4_COMPRESSED, 9);
|
|
FilterOutStream::write(&write, sizeof(write));
|
|
FilterOutStream::write(outbuf, write);
|
|
out_total += write + sizeof(write);
|
|
}
|
|
FilterOutStream::write(&in_total, sizeof(in_total));
|
|
return out_total + sizeof(in_total);
|
|
}
|