mirror of
https://github.com/topjohnwu/Magisk.git
synced 2024-12-27 01:37:40 +00:00
267 lines
6.6 KiB
C++
267 lines
6.6 KiB
C++
#include <string.h>
|
|
#include <stdlib.h>
|
|
#include <sys/stat.h>
|
|
|
|
#include "magiskboot.h"
|
|
#include "cpio.h"
|
|
#include "utils.h"
|
|
|
|
class magisk_cpio : public cpio {
|
|
public:
|
|
magisk_cpio(const char *filename) : cpio(filename) {}
|
|
void patch(bool keepverity, bool keepforceencrypt);
|
|
int test();
|
|
char * sha1();
|
|
void restore();
|
|
void backup(const char *orig);
|
|
};
|
|
|
|
void magisk_cpio::patch(bool keepverity, bool keepforceencrypt) {
|
|
fprintf(stderr, "Patch with flag KEEPVERITY=[%s] KEEPFORCEENCRYPT=[%s]\n",
|
|
keepverity ? "true" : "false", keepforceencrypt ? "true" : "false");
|
|
for (auto &e : arr) {
|
|
if (!e)
|
|
continue;
|
|
bool fstab = (!keepverity || !keepforceencrypt) &&
|
|
!e->filename.starts_with(".backup") &&
|
|
e->filename.contains("fstab") && S_ISREG(e->mode);
|
|
if (!keepverity) {
|
|
if (fstab) {
|
|
patch_verity(&e->data, &e->filesize, 1);
|
|
} else if (e->filename == "verity_key") {
|
|
fprintf(stderr, "Remove [verity_key]\n");
|
|
delete e;
|
|
e = nullptr;
|
|
continue;
|
|
}
|
|
}
|
|
if (!keepforceencrypt) {
|
|
if (fstab) {
|
|
patch_encryption(&e->data, &e->filesize);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
#define STOCK_BOOT 0x0
|
|
#define MAGISK_PATCH 0x1
|
|
#define UNSUPPORT_PATCH 0x2
|
|
int magisk_cpio::test() {
|
|
static const char *UNSUPPORT_LIST[] = { "sbin/launch_daemonsu.sh", "sbin/su", "init.xposed.rc",
|
|
"boot/sbin/launch_daemonsu.sh" };
|
|
static const char *MAGISK_LIST[] = { ".backup/.magisk", "init.magisk.rc",
|
|
"overlay/init.magisk.rc" };
|
|
|
|
for (auto file : UNSUPPORT_LIST)
|
|
if (find(file) >= 0)
|
|
return UNSUPPORT_PATCH;
|
|
|
|
for (auto file : MAGISK_LIST)
|
|
if (find(file) >= 0)
|
|
return MAGISK_PATCH;
|
|
|
|
return STOCK_BOOT;
|
|
}
|
|
|
|
#define for_each_line(line, buf, size) \
|
|
for (line = (char *) buf; line < (char *) buf + size && line[0]; line = strchr(line + 1, '\n') + 1)
|
|
|
|
char *magisk_cpio::sha1() {
|
|
char sha1[41];
|
|
char *line;
|
|
for (auto &e : arr) {
|
|
if (!e) continue;
|
|
if (e->filename == "init.magisk.rc" || e->filename == "overlay/init.magisk.rc") {
|
|
for_each_line(line, e->data, e->filesize) {
|
|
if (strncmp(line, "#STOCKSHA1=", 11) == 0) {
|
|
strncpy(sha1, line + 12, 40);
|
|
sha1[40] = '\0';
|
|
return strdup(sha1);
|
|
}
|
|
}
|
|
} else if (e->filename == ".backup/.magisk") {
|
|
for_each_line(line, e->data, e->filesize) {
|
|
if (strncmp(line, "SHA1=", 5) == 0) {
|
|
strncpy(sha1, line + 5, 40);
|
|
sha1[40] = '\0';
|
|
return strdup(sha1);
|
|
}
|
|
}
|
|
} else if (e->filename == ".backup/.sha1") {
|
|
return (char *) e->data;
|
|
}
|
|
}
|
|
return nullptr;
|
|
}
|
|
|
|
void magisk_cpio::restore() {
|
|
for (auto &e : arr) {
|
|
if (!e) continue;
|
|
if (e->filename.starts_with(".backup")) {
|
|
if (e->filename[7] == '\0') continue;
|
|
if (e->filename[8] == '.') {
|
|
if (strcmp(&e->filename[8], ".rmlist") == 0) {
|
|
for (int pos = 0; pos < e->filesize; pos += strlen((char *) e->data + pos) + 1)
|
|
rm((char *) e->data + pos, false);
|
|
}
|
|
} else {
|
|
mv(e->filename, e->filename + 8);
|
|
}
|
|
}
|
|
}
|
|
|
|
// Some known stuff we can remove
|
|
rm(".backup", true);
|
|
rm("overlay", true);
|
|
rm("sbin/magic_mask.sh", false);
|
|
rm("init.magisk.rc", false);
|
|
rm("magisk", true);
|
|
}
|
|
|
|
void magisk_cpio::backup(const char *orig) {
|
|
Vector<cpio_entry*> bak;
|
|
cpio_entry *m, *n, *rem;
|
|
char buf[PATH_MAX];
|
|
|
|
m = new cpio_entry();
|
|
m->filename = ".backup";
|
|
m->mode = S_IFDIR;
|
|
bak.push_back(m);
|
|
|
|
rem = new cpio_entry();
|
|
rem->filename = ".backup/.rmlist";
|
|
rem->mode = S_IFREG;
|
|
|
|
magisk_cpio o(orig);
|
|
|
|
// Remove possible backups in original ramdisk
|
|
o.rm(".backup", true);
|
|
rm(".backup", true);
|
|
|
|
// Sort both CPIOs before comparing
|
|
o.sort();
|
|
sort();
|
|
|
|
// Start comparing
|
|
size_t i = 0, j = 0;
|
|
while(i != o.arr.size() || j != arr.size()) {
|
|
int res;
|
|
bool backup = false;
|
|
if (i != o.arr.size() && j != arr.size()) {
|
|
m = o.arr[i];
|
|
n = arr[j];
|
|
res = m->filename.compare(n->filename);
|
|
} else if (i == o.arr.size()) {
|
|
n = arr[j];
|
|
res = 1;
|
|
} else if (j == arr.size()) {
|
|
m = o.arr[i];
|
|
res = -1;
|
|
}
|
|
|
|
if (res < 0) {
|
|
// Something is missing in new ramdisk, backup!
|
|
++i;
|
|
backup = true;
|
|
fprintf(stderr, "Backup missing entry: ");
|
|
} else if (res == 0) {
|
|
++i; ++j;
|
|
if (m->filesize == n->filesize && memcmp(m->data, n->data, m->filesize) == 0)
|
|
continue;
|
|
// Not the same!
|
|
backup = true;
|
|
fprintf(stderr, "Backup mismatch entry: ");
|
|
} else {
|
|
// Something new in ramdisk, record in rem
|
|
++j;
|
|
rem->data = xrealloc(rem->data, rem->filesize + n->filename.size());
|
|
memcpy((char *) rem->data + rem->filesize, n->filename, n->filename.size());
|
|
rem->filesize += n->filename.size();
|
|
fprintf(stderr, "Record new entry: [%s] -> [.backup/.rmlist]\n", n->filename.c_str());
|
|
}
|
|
if (backup) {
|
|
sprintf(buf, ".backup/%s", m->filename.c_str());
|
|
fprintf(stderr, "[%s] -> [%s]\n", m->filename.c_str(), buf);
|
|
m->filename = buf;
|
|
bak.push_back(m);
|
|
// NULL the original entry, so it won't be freed
|
|
o.arr[i - 1] = nullptr;
|
|
}
|
|
}
|
|
|
|
if (rem->filesize)
|
|
bak.push_back(rem);
|
|
else
|
|
delete rem;
|
|
|
|
if (bak.size() > 1)
|
|
insert(bak);
|
|
}
|
|
|
|
|
|
int cpio_commands(int argc, char *argv[]) {
|
|
char *incpio = argv[0];
|
|
++argv;
|
|
--argc;
|
|
|
|
magisk_cpio cpio(incpio);
|
|
|
|
int cmdc;
|
|
char *cmdv[6];
|
|
|
|
while (argc) {
|
|
// Clean up
|
|
cmdc = 0;
|
|
memset(cmdv, NULL, sizeof(cmdv));
|
|
|
|
// Split the commands
|
|
for (char *tok = strtok(argv[0], " "); tok; tok = strtok(nullptr, " "))
|
|
cmdv[cmdc++] = tok;
|
|
|
|
if (cmdc == 0)
|
|
continue;
|
|
|
|
if (strcmp(cmdv[0], "test") == 0) {
|
|
exit(cpio.test());
|
|
} else if (strcmp(cmdv[0], "restore") == 0) {
|
|
cpio.restore();
|
|
} else if (strcmp(cmdv[0], "sha1") == 0) {
|
|
char *sha1 = cpio.sha1();
|
|
if (sha1) printf("%s\n", sha1);
|
|
return 0;
|
|
} else if (cmdc == 2 && strcmp(cmdv[0], "exists") == 0) {
|
|
exit(cpio.find(cmdv[1]) < 0);
|
|
} else if (cmdc == 2 && strcmp(cmdv[0], "backup") == 0) {
|
|
cpio.backup(cmdv[1]);
|
|
} else if (cmdc >= 2 && strcmp(cmdv[0], "rm") == 0) {
|
|
bool r = cmdc > 2 && strcmp(cmdv[1], "-r") == 0;
|
|
cpio.rm(cmdv[1 + r], r);
|
|
} else if (cmdc == 3 && strcmp(cmdv[0], "mv") == 0) {
|
|
cpio.mv(cmdv[1], cmdv[2]);
|
|
} else if (cmdc == 3 && strcmp(cmdv[0], "patch") == 0) {
|
|
cpio.patch(strcmp(cmdv[1], "true") == 0, strcmp(cmdv[2], "true") == 0);
|
|
} else if (strcmp(cmdv[0], "extract") == 0) {
|
|
if (cmdc == 3) {
|
|
return !cpio.extract(cmdv[1], cmdv[2]);
|
|
} else {
|
|
cpio.extract();
|
|
return 0;
|
|
}
|
|
} else if (cmdc == 3 && strcmp(cmdv[0], "mkdir") == 0) {
|
|
cpio.makedir(strtoul(cmdv[1], NULL, 8), cmdv[2]);
|
|
} else if (cmdc == 3 && strcmp(cmdv[0], "ln") == 0) {
|
|
cpio.ln(cmdv[1], cmdv[2]);
|
|
} else if (cmdc == 4 && strcmp(cmdv[0], "add") == 0) {
|
|
cpio.add(strtoul(cmdv[1], NULL, 8), cmdv[2], cmdv[3]);
|
|
} else {
|
|
return 1;
|
|
}
|
|
|
|
--argc;
|
|
++argv;
|
|
}
|
|
|
|
cpio.dump(incpio);
|
|
return 0;
|
|
} |