mirror of
https://github.com/topjohnwu/Magisk.git
synced 2024-12-22 07:57:39 +00:00
Add DHTB header support
This commit is contained in:
topjohnwu
parent
a58d3ea04d
commit
7cfc24d68f
@ -93,6 +93,9 @@ void wait_till_exists(const char *target);
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// file.c
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#define align(p, a) (((p) + (a) - 1) / (a) * (a))
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#define align_off(p, a) (align(p, a) - (p))
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extern char **excl_list;
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struct file_attr {
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@ -125,8 +128,6 @@ void full_read(const char *filename, void **buf, size_t *size);
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void full_read_at(int dirfd, const char *filename, void **buf, size_t *size);
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void stream_full_read(int fd, void **buf, size_t *size);
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void write_zero(int fd, size_t size);
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void mem_align(size_t *pos, size_t align);
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void file_align(int fd, size_t align, int out);
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// img.c
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@ -7,6 +7,8 @@
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#include "magiskboot.h"
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#include "utils.h"
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#include "logging.h"
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#include "mincrypt/sha.h"
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#include "mincrypt/sha256.h"
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#define INSUF_BLOCK_RET 2
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#define CHROMEOS_RET 3
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@ -68,6 +70,10 @@ static void print_hdr(const boot_img *boot) {
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fprintf(stderr, "NAME [%s]\n", header(boot, name));
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fprintf(stderr, "CMDLINE [%s]\n", header(boot, cmdline));
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fprintf(stderr, "CHECKSUM [");
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for (int i = 0; i < ((boot->flags & SHA256_FLAG) ? SHA256_DIGEST_SIZE : SHA_DIGEST_SIZE); ++i)
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fprintf(stderr, "%02x", header(boot, id)[i]);
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fprintf(stderr, "]\n");
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}
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static void clean_boot(boot_img *boot) {
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@ -78,6 +84,7 @@ static void clean_boot(boot_img *boot) {
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memset(boot, 0, sizeof(*boot));
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}
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#define pos_align() pos = align(pos, header(boot, page_size))
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int parse_img(const char *image, boot_img *boot) {
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memset(boot, 0, sizeof(*boot));
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int is_blk = mmap_ro(image, &boot->map_addr, &boot->map_size);
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@ -92,6 +99,11 @@ int parse_img(const char *image, boot_img *boot) {
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// The caller should know it's chromeos, as it needs additional signing
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boot->flags |= CHROMEOS_FLAG;
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continue;
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case DHTB:
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boot->flags |= DHTB_FLAG;
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boot->flags |= SEANDROID_FLAG;
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fprintf(stderr, "DHTB_HDR\n");
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continue;
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case ELF32:
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exit(ELF32_RET);
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case ELF64:
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@ -109,26 +121,33 @@ int parse_img(const char *image, boot_img *boot) {
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}
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pos += header(boot, page_size);
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for (int i = SHA_DIGEST_SIZE; i < SHA256_DIGEST_SIZE; ++i) {
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if (header(boot, id)[i]) {
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boot->flags |= SHA256_FLAG;
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break;
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}
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}
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print_hdr(boot);
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boot->kernel = head + pos;
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pos += header(boot, kernel_size);
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mem_align(&pos, header(boot, page_size));
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pos_align();
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boot->ramdisk = head + pos;
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pos += header(boot, ramdisk_size);
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mem_align(&pos, header(boot, page_size));
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pos_align();
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if (header(boot, second_size)) {
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boot->second = head + pos;
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pos += header(boot, second_size);
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mem_align(&pos, header(boot, page_size));
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pos_align();
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}
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if (header(boot, extra_size)) {
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boot->extra = head + pos;
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pos += header(boot, extra_size);
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mem_align(&pos, header(boot, page_size));
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pos_align();
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}
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if (pos < boot->map_size) {
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@ -136,6 +155,13 @@ int parse_img(const char *image, boot_img *boot) {
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boot->tail_size = boot->map_size - pos;
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}
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// Check tail info, currently only for LG Bump and Samsung SEANDROIDENFORCE
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if (boot->tail_size >= 16 && memcmp(boot->tail, SEANDROID_MAGIC, 16) == 0) {
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boot->flags |= SEANDROID_FLAG;
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} else if (boot->tail_size >= 16 && memcmp(boot->tail, LG_BUMP_MAGIC, 16) == 0) {
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boot->flags |= LG_BUMP_FLAG;
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}
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// Search for dtb in kernel
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for (uint32_t i = 0; i < header(boot, kernel_size); ++i) {
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if (memcmp(boot->kernel + i, DTB_MAGIC, 4) == 0) {
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@ -232,11 +258,11 @@ int unpack(const char *image) {
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return ret;
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}
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#define file_align() write_zero(fd, align_off(lseek(fd, 0, SEEK_CUR) - header_off, header(&boot, page_size)))
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void repack(const char* orig_image, const char* out_image) {
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boot_img boot;
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// There are possible two MTK headers
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off_t mtk_kernel_off, mtk_ramdisk_off;
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off_t header_off, kernel_off, ramdisk_off, second_off, extra_off;
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// Parse original image
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parse_img(orig_image, &boot);
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@ -246,12 +272,19 @@ void repack(const char* orig_image, const char* out_image) {
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// Create new image
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int fd = creat(out_image, 0644);
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if (boot.flags & DHTB_FLAG) {
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// Skip DHTB header
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write_zero(fd, 512);
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}
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// Skip a page for header
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header_off = lseek(fd, 0, SEEK_CUR);
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write_zero(fd, header(&boot, page_size));
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// kernel
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kernel_off = lseek(fd, 0, SEEK_CUR);
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if (boot.flags & MTK_KERNEL) {
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// Record position and skip MTK header
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mtk_kernel_off = lseek(fd, 0, SEEK_CUR);
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// Skip MTK header
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write_zero(fd, 512);
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}
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if (COMPRESSED(boot.k_fmt)) {
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@ -263,15 +296,16 @@ void repack(const char* orig_image, const char* out_image) {
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} else {
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lheader(&boot, kernel_size, = restore(KERNEL_FILE, fd));
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}
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// Restore dtb
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// dtb
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if (boot.dt_size && access(DTB_FILE, R_OK) == 0) {
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lheader(&boot, kernel_size, += restore(DTB_FILE, fd));
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}
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file_align(fd, header(&boot, page_size), 1);
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file_align();
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// ramdisk
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ramdisk_off = lseek(fd, 0, SEEK_CUR);
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if (boot.flags & MTK_RAMDISK) {
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// Record position and skip MTK header
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mtk_ramdisk_off = lseek(fd, 0, SEEK_CUR);
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// Skip MTK header
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write_zero(fd, 512);
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}
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if (access(RAMDISK_FILE, R_OK) == 0) {
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@ -296,48 +330,83 @@ void repack(const char* orig_image, const char* out_image) {
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LOGE("No ramdisk exists!\n");
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lheader(&boot, ramdisk_size, = restore(name, fd));
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}
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file_align(fd, header(&boot, page_size), 1);
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file_align();
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// Restore second
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// second
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second_off = lseek(fd, 0, SEEK_CUR);
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if (header(&boot, second_size) && access(SECOND_FILE, R_OK) == 0) {
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lheader(&boot, second_size, = restore(SECOND_FILE, fd));
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file_align(fd, header(&boot, page_size), 1);
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file_align();
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}
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// Restore extra
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// extra
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extra_off = lseek(fd, 0, SEEK_CUR);
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if (header(&boot, extra_size) && access(EXTRA_FILE, R_OK) == 0) {
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lheader(&boot, extra_size, = restore(EXTRA_FILE, fd));
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file_align(fd, header(&boot, page_size), 1);
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file_align();
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}
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// Check tail info, currently only for LG Bump and Samsung SEANDROIDENFORCE
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if (boot.tail_size >= 16) {
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if (memcmp(boot.tail, "SEANDROIDENFORCE", 16) == 0 ||
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memcmp(boot.tail, LG_BUMP_MAGIC, 16) == 0 ) {
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restore_buf(fd, boot.tail, 16);
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}
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// Append tail info
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if (boot.flags & SEANDROID_FLAG) {
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restore_buf(fd, SEANDROID_MAGIC "\xFF\xFF\xFF\xFF", 20);
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}
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if (boot.flags & LG_BUMP_FLAG) {
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restore_buf(fd, LG_BUMP_MAGIC, 16);
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}
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// Write MTK headers back
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close(fd);
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// Map output image as rw
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munmap(boot.map_addr, boot.map_size);
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mmap_rw(out_image, &boot.map_addr, &boot.map_size);
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// MTK headers
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if (boot.flags & MTK_KERNEL) {
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lseek(fd, mtk_kernel_off, SEEK_SET);
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boot.k_hdr->size = header(&boot, kernel_size);
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lheader(&boot, kernel_size, += 512);
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restore_buf(fd, boot.k_hdr, sizeof(mtk_hdr));
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memcpy(boot.map_addr + kernel_off, boot.k_hdr, sizeof(mtk_hdr));
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}
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if (boot.flags & MTK_RAMDISK) {
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lseek(fd, mtk_ramdisk_off, SEEK_SET);
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boot.r_hdr->size = header(&boot, ramdisk_size);
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lheader(&boot, ramdisk_size, += 512);
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restore_buf(fd, boot.r_hdr, sizeof(mtk_hdr));
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memcpy(boot.map_addr + ramdisk_off, boot.r_hdr, sizeof(mtk_hdr));
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}
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// Main header
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lseek(fd, 0, SEEK_SET);
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restore_buf(fd, boot.hdr, (boot.flags & PXA_FLAG) ? sizeof(pxa_boot_img_hdr) : sizeof(boot_img_hdr));
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// Update checksum
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HASH_CTX ctx;
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(boot.flags & SHA256_FLAG) ? SHA256_init(&ctx) : SHA_init(&ctx);
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uint32_t size = header(&boot, kernel_size);
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HASH_update(&ctx, boot.map_addr + kernel_off, size);
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HASH_update(&ctx, &size, sizeof(size));
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size = header(&boot, ramdisk_size);
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HASH_update(&ctx, boot.map_addr + ramdisk_off, size);
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HASH_update(&ctx, &size, sizeof(size));
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size = header(&boot, second_size);
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HASH_update(&ctx, boot.map_addr + second_off, size);
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HASH_update(&ctx, &size, sizeof(size));
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size = header(&boot, extra_size);
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if (size) {
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HASH_update(&ctx, boot.map_addr + extra_off, size);
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HASH_update(&ctx, &size, sizeof(size));
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}
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memset(header(&boot, id), 0, 32);
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memcpy(header(&boot, id), HASH_final(&ctx),
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(boot.flags & SHA256_FLAG) ? SHA256_DIGEST_SIZE : SHA_DIGEST_SIZE);
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// Print new image info
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print_hdr(&boot);
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// Main header
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memcpy(boot.map_addr + header_off, boot.hdr,
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(boot.flags & PXA_FLAG) ? sizeof(pxa_boot_img_hdr) : sizeof(boot_img_hdr));
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// DHTB header
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if (boot.flags & DHTB_FLAG) {
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dhtb_hdr *hdr = boot.map_addr;
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memcpy(hdr, DHTB_MAGIC, 8);
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hdr->size = boot.map_size - 512;
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SHA256_hash(boot.map_addr + 512, hdr->size, hdr->checksum);
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}
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clean_boot(&boot);
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close(fd);
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}
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@ -28,10 +28,8 @@ typedef struct boot_img_hdr {
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uint32_t os_version;
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char name[16]; /* asciiz product name */
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char cmdline[512];
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uint32_t id[8]; /* timestamp / checksum / sha1 / etc */
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char id[32]; /* timestamp / checksum / sha1 / etc */
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/* Supplemental command line data; kept here to maintain
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* binary compatibility with older versions of mkbootimg */
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@ -56,10 +54,8 @@ typedef struct pxa_boot_img_hdr {
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uint32_t page_size; /* flash page size we assume */
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char name[24]; /* asciiz product name */
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char cmdline[512];
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uint32_t id[8]; /* timestamp / checksum / sha1 / etc */
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char id[32]; /* timestamp / checksum / sha1 / etc */
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/* Supplemental command line data; kept here to maintain
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* binary compatibility with older versions of mkbootimg */
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@ -102,11 +98,21 @@ typedef struct mtk_hdr {
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char name[32]; /* The type of the header */
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} __attribute__((packed)) mtk_hdr;
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typedef struct dhtb_hdr {
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char magic[8]; /* DHTB magic */
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char checksum[40]; /* Payload SHA256, whole image + SEANDROIDENFORCE + 0xFFFFFFFF */
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uint32_t size; /* Payload size, whole image + SEANDROIDENFORCE + 0xFFFFFFFF */
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} __attribute__((packed)) dhtb_hdr;
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// Flags
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#define MTK_KERNEL 0x01
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#define MTK_RAMDISK 0x02
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#define CHROMEOS_FLAG 0x04
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#define PXA_FLAG 0x08
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#define MTK_KERNEL 0x01
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#define MTK_RAMDISK 0x02
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#define CHROMEOS_FLAG 0x04
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#define PXA_FLAG 0x08
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#define DHTB_FLAG 0x10
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#define SEANDROID_FLAG 0x20
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#define LG_BUMP_FLAG 0x40
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#define SHA256_FLAG 0x80
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typedef struct boot_img {
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// Memory map of the whole image
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@ -114,9 +120,9 @@ typedef struct boot_img {
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size_t map_size;
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// Headers
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void *hdr; /* Either boot_img_hdr or pxa_boot_img_hdr */
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mtk_hdr *k_hdr; /* MTK kernel header */
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mtk_hdr *r_hdr; /* MTK ramdisk header */
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void *hdr; /* Either boot_img_hdr or pxa_boot_img_hdr */
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mtk_hdr *k_hdr; /* MTK kernel header */
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mtk_hdr *r_hdr; /* MTK ramdisk header */
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// Flags to indicate the state of current boot image
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uint8_t flags;
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@ -31,6 +31,8 @@ format_t check_fmt(const void *buf) {
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return MTK;
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} else if (memcmp(buf, DTB_MAGIC, 4) == 0) {
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return DTB;
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} else if (memcmp(buf, DHTB_MAGIC, 8) == 0) {
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return DHTB;
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} else {
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return UNKNOWN;
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}
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@ -2,20 +2,21 @@
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#define _FORMAT_H_
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typedef enum {
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UNKNOWN,
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CHROMEOS,
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AOSP,
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ELF32,
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ELF64,
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GZIP,
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LZOP,
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XZ,
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LZMA,
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BZIP2,
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LZ4,
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LZ4_LEGACY,
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MTK,
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DTB
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UNKNOWN,
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CHROMEOS,
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AOSP,
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ELF32,
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ELF64,
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GZIP,
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LZOP,
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XZ,
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LZMA,
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BZIP2,
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LZ4,
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LZ4_LEGACY,
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MTK,
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DTB,
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DHTB
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} format_t;
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#define COMPRESSED(fmt) (fmt >= GZIP && fmt <= LZ4_LEGACY)
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@ -33,6 +34,8 @@ typedef enum {
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#define MTK_MAGIC "\x88\x16\x88\x58"
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#define DTB_MAGIC "\xd0\x0d\xfe\xed"
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#define LG_BUMP_MAGIC "\x41\xa9\xe4\x67\x74\x4d\x1d\x1b\xa4\x29\xf2\xec\xea\x65\x52\x79"
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#define DHTB_MAGIC "\x44\x48\x54\x42\x01\x00\x00\x00"
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#define SEANDROID_MAGIC "SEANDROIDENFORCE"
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#define SUP_LIST ((char *[]) { "gzip", "xz", "lzma", "bzip2", "lz4", "lz4_legacy", NULL })
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#define SUP_EXT_LIST ((char *[]) { "gz", "xz", "lzma", "bz2", "lz4", "lz4", NULL })
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@ -56,6 +56,7 @@ void cpio_vec_insert(struct vector *v, cpio_entry *n) {
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}
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// Parse cpio file to a vector of cpio_entry
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#define parse_align() lseek(fd, align(lseek(fd, 0, SEEK_CUR), 4), SEEK_SET)
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void parse_cpio(struct vector *v, const char *filename) {
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int fd = open(filename, O_RDONLY);
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if (fd < 0) return;
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@ -79,7 +80,7 @@ void parse_cpio(struct vector *v, const char *filename) {
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// f->check = x8u(header.check);
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f->filename = xmalloc(namesize);
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xxread(fd, f->filename, namesize);
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file_align(fd, 4, 0);
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parse_align();
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if (strcmp(f->filename, ".") == 0 || strcmp(f->filename, "..") == 0) {
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cpio_free(f);
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continue;
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@ -91,13 +92,14 @@ void parse_cpio(struct vector *v, const char *filename) {
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if (f->filesize) {
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f->data = xmalloc(f->filesize);
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xxread(fd, f->data, f->filesize);
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file_align(fd, 4, 0);
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parse_align();
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}
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vec_push_back(v, f);
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}
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close(fd);
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}
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#define dump_align() write_zero(fd, align_off(lseek(fd, 0, SEEK_CUR), 4))
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void dump_cpio(struct vector *v, const char *filename) {
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fprintf(stderr, "Dump cpio: [%s]\n", filename);
|
||||
unsigned inode = 300000;
|
||||
@ -124,17 +126,17 @@ void dump_cpio(struct vector *v, const char *filename) {
|
||||
);
|
||||
xwrite(fd, header, 110);
|
||||
xwrite(fd, e->filename, strlen(e->filename) + 1);
|
||||
file_align(fd, 4, 1);
|
||||
dump_align();
|
||||
if (e->filesize) {
|
||||
xwrite(fd, e->data, e->filesize);
|
||||
file_align(fd, 4, 1);
|
||||
dump_align();
|
||||
}
|
||||
}
|
||||
// Write trailer
|
||||
sprintf(header, "070701%08x%08x%08x%08x%08x%08x%08x%08x%08x%08x%08x%08x%08x", inode++, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 11, 0);
|
||||
xwrite(fd, header, 110);
|
||||
xwrite(fd, "TRAILER!!!\0", 11);
|
||||
file_align(fd, 4, 1);
|
||||
dump_align();
|
||||
close(fd);
|
||||
}
|
||||
|
||||
|
||||
@ -424,24 +424,3 @@ void write_zero(int fd, size_t size) {
|
||||
ftruncate(fd, pos + size);
|
||||
lseek(fd, pos + size, SEEK_SET);
|
||||
}
|
||||
|
||||
void mem_align(size_t *pos, size_t align) {
|
||||
size_t mask = align - 1;
|
||||
if (*pos & mask) {
|
||||
*pos += align - (*pos & mask);
|
||||
}
|
||||
}
|
||||
|
||||
void file_align(int fd, size_t align, int out) {
|
||||
size_t pos = lseek(fd, 0, SEEK_CUR);
|
||||
size_t mask = align - 1;
|
||||
size_t off;
|
||||
if (pos & mask) {
|
||||
off = align - (pos & mask);
|
||||
if (out) {
|
||||
write_zero(fd, off);
|
||||
} else {
|
||||
lseek(fd, pos + off, SEEK_SET);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
Loading…
x
Reference in New Issue
Block a user