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Patch AVB structures

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Disable vbmeta verification in flags
This commit is contained in:
topjohnwu
2021-03-02 20:37:37 -08:00
parent 55fdee4d65
commit 027ec70262
7 changed files with 161 additions and 75 deletions
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21
native/jni/magiskboot/dtb.cpp
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@@ -8,6 +8,7 @@
#include "magiskboot.hpp"
#include "dtb.hpp"
#include "format.hpp"
extern "C" {
#include <libfdt.h>
}
@@ -105,7 +106,7 @@ static void dtb_print(const char *file, bool fstab) {
int dtb_num = 0;
uint8_t * const end = dtb + size;
for (uint8_t *fdt = dtb; fdt < end;) {
fdt = static_cast<uint8_t*>(memmem(fdt, end - fdt, FDT_MAGIC_STR, sizeof(fdt32_t)));
fdt = static_cast<uint8_t*>(memmem(fdt, end - fdt, DTB_MAGIC, sizeof(fdt32_t)));
if (fdt == nullptr)
break;
if (fstab) {
@@ -139,7 +140,7 @@ static bool dtb_patch(const char *file) {
bool patched = false;
uint8_t * const end = dtb + size;
for (uint8_t *fdt = dtb; fdt < end;) {
fdt = static_cast<uint8_t*>(memmem(fdt, end - fdt, FDT_MAGIC_STR, sizeof(fdt32_t)));
fdt = static_cast<uint8_t*>(memmem(fdt, end - fdt, DTB_MAGIC, sizeof(fdt32_t)));
if (fdt == nullptr)
break;
if (int fstab = find_fstab(fdt); fstab >= 0) {
@@ -316,7 +317,7 @@ static bool blob_patch(uint8_t *dtb, size_t dtb_sz, const char *out) {
uint8_t * const end = dtb + dtb_sz;
for (uint8_t *curr = dtb; curr < end;) {
curr = static_cast<uint8_t*>(memmem(curr, end - curr, FDT_MAGIC_STR, sizeof(fdt32_t)));
curr = static_cast<uint8_t*>(memmem(curr, end - curr, DTB_MAGIC, sizeof(fdt32_t)));
if (curr == nullptr)
break;
auto len = fdt_totalsize(curr);
@@ -355,10 +356,10 @@ static bool blob_patch(uint8_t *dtb, size_t dtb_sz, const char *out) {
return true;
}
#define MATCH(s) (memcmp(dtb, s, sizeof(s) - 1) == 0)
#define DTB_MATCH(s) BUFFER_MATCH(dtb, s)
static bool dtb_patch_rebuild(uint8_t *dtb, size_t dtb_sz, const char *file) {
if (MATCH(QCDT_MAGIC)) {
if (DTB_MATCH(QCDT_MAGIC)) {
auto hdr = reinterpret_cast<qcdt_hdr*>(dtb);
switch (hdr->version) {
case 1:
@@ -373,7 +374,7 @@ static bool dtb_patch_rebuild(uint8_t *dtb, size_t dtb_sz, const char *file) {
default:
return false;
}
} else if (MATCH(DTBH_MAGIC)) {
} else if (DTB_MATCH(DTBH_MAGIC)) {
auto hdr = reinterpret_cast<dtbh_hdr *>(dtb);
switch (hdr->version) {
case 2:
@@ -382,7 +383,7 @@ static bool dtb_patch_rebuild(uint8_t *dtb, size_t dtb_sz, const char *file) {
default:
return false;
}
} else if (MATCH(PXADT_MAGIC)) {
} else if (DTB_MATCH(PXADT_MAGIC)) {
auto hdr = reinterpret_cast<pxadt_hdr *>(dtb);
switch (hdr->version) {
case 1:
@@ -391,7 +392,7 @@ static bool dtb_patch_rebuild(uint8_t *dtb, size_t dtb_sz, const char *file) {
default:
return false;
}
} else if (MATCH(PXA19xx_MAGIC)) {
} else if (DTB_MATCH(PXA19xx_MAGIC)) {
auto hdr = reinterpret_cast<pxa19xx_hdr *>(dtb);
switch (hdr->version) {
case 1:
@@ -400,7 +401,7 @@ static bool dtb_patch_rebuild(uint8_t *dtb, size_t dtb_sz, const char *file) {
default:
return false;
}
} else if (MATCH(SPRD_MAGIC)) {
} else if (DTB_MATCH(SPRD_MAGIC)) {
auto hdr = reinterpret_cast<sprd_hdr *>(dtb);
switch (hdr->version) {
case 1:
@@ -409,7 +410,7 @@ static bool dtb_patch_rebuild(uint8_t *dtb, size_t dtb_sz, const char *file) {
default:
return false;
}
} else if (MATCH(DT_TABLE_MAGIC)) {
} else if (DTB_MATCH(DT_TABLE_MAGIC)) {
auto hdr = reinterpret_cast<dt_table_header *>(dtb);
switch (hdr->version) {
case 0: