mirror of
https://github.com/topjohnwu/Magisk.git
synced 2024-12-26 07:37:40 +00:00
340 lines
9.1 KiB
C
340 lines
9.1 KiB
C
#include <stdio.h>
|
|
#include <unistd.h>
|
|
#include <sys/stat.h>
|
|
#include <utils.h>
|
|
#include <sys/mman.h>
|
|
#include <fcntl.h>
|
|
|
|
#include "magiskboot.h"
|
|
#include "cpio.h"
|
|
|
|
static void cpio_patch(struct vector *v, int keepverity, int keepforceencrypt) {
|
|
fprintf(stderr, "Patch with flag KEEPVERITY=[%s] KEEPFORCEENCRYPT=[%s]\n",
|
|
keepverity ? "true" : "false", keepforceencrypt ? "true" : "false");
|
|
cpio_entry *e;
|
|
vec_for_each(v, e) {
|
|
if (!e) continue;
|
|
if (!keepverity) {
|
|
if (strncmp(e->filename, ".backup", 7) && strstr(e->filename, "fstab") && S_ISREG(e->mode)) {
|
|
patch_verity(&e->data, &e->filesize, 1);
|
|
} else if (strcmp(e->filename, "verity_key") == 0) {
|
|
fprintf(stderr, "Remove [verity_key]\n");
|
|
cpio_free(e);
|
|
vec_cur(v) = NULL;
|
|
continue;
|
|
}
|
|
}
|
|
if (!keepforceencrypt) {
|
|
if (strstr(e->filename, "fstab") != NULL && S_ISREG(e->mode)) {
|
|
patch_encryption(&e->data, &e->filesize);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
#define STOCK_BOOT 0x0
|
|
#define MAGISK_PATCH 0x1
|
|
#define HIGH_COMPRESS 0x2
|
|
#define OTHER_PATCH 0x3
|
|
|
|
static int cpio_test(struct vector *v) {
|
|
const char *OTHER_LIST[] = { "sbin/launch_daemonsu.sh", "sbin/su", "init.xposed.rc", "boot/sbin/launch_daemonsu.sh", NULL };
|
|
const char *MAGISK_LIST[] = { ".backup/.magisk", "init.magisk.rc", "overlay/init.magisk.rc", NULL };
|
|
|
|
for (int i = 0; OTHER_LIST[i]; ++i)
|
|
if (cpio_find(v, OTHER_LIST[i]) >= 0)
|
|
return OTHER_PATCH;
|
|
|
|
if (cpio_find(v, "ramdisk.cpio.xz") >= 0)
|
|
return HIGH_COMPRESS;
|
|
|
|
for (int i = 0; MAGISK_LIST[i]; ++i)
|
|
if (cpio_find(v, MAGISK_LIST[i]) >= 0)
|
|
return MAGISK_PATCH;
|
|
|
|
return STOCK_BOOT;
|
|
}
|
|
|
|
static char *cpio_sha1(struct vector *v) {
|
|
cpio_entry *e;
|
|
char sha1[41];
|
|
vec_for_each(v, e) {
|
|
if (!e) continue;
|
|
if (strcmp(e->filename, "init.magisk.rc") == 0
|
|
|| strcmp(e->filename, "overlay/init.magisk.rc") == 0) {
|
|
for (void *pos = e->data; pos < e->data + e->filesize; pos = strchr(pos + 1, '\n') + 1) {
|
|
if (memcmp(pos, "# STOCKSHA1=", 12) == 0) {
|
|
pos += 12;
|
|
memcpy(sha1, pos, 40);
|
|
sha1[40] = '\0';
|
|
return strdup(sha1);
|
|
}
|
|
}
|
|
} else if (strcmp(e->filename, ".backup/.sha1") == 0) {
|
|
return e->data;
|
|
}
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
static void cpio_backup(struct vector *v, struct vector *bak, const char *orig, const char *sha1) {
|
|
struct vector o_body, *o = &o_body;
|
|
cpio_entry *m, *n, *rem, *cksm;
|
|
char buf[PATH_MAX];
|
|
int res, backup;
|
|
|
|
m = xcalloc(sizeof(*m), 1);
|
|
m->filename = strdup(".backup");
|
|
m->mode = S_IFDIR;
|
|
vec_push_back(bak, m);
|
|
|
|
rem = xcalloc(sizeof(*rem), 1);
|
|
rem->filename = strdup(".backup/.rmlist");
|
|
rem->mode = S_IFREG;
|
|
|
|
if (sha1) {
|
|
fprintf(stderr, "Save SHA1: [%s] -> [.backup/.sha1]\n", sha1);
|
|
cksm = xcalloc(sizeof(*cksm), 1);
|
|
vec_push_back(bak, cksm);
|
|
cksm->filename = strdup(".backup/.sha1");
|
|
cksm->mode = S_IFREG;
|
|
cksm->data = strdup(sha1);
|
|
cksm->filesize = strlen(sha1) + 1;
|
|
}
|
|
|
|
vec_init(o);
|
|
parse_cpio(o, orig);
|
|
// Remove possible backups in original ramdisk
|
|
cpio_rm(o, 1, ".backup");
|
|
cpio_rm(v, 1, ".backup");
|
|
|
|
// Sort both vectors before comparing
|
|
vec_sort(o, cpio_cmp);
|
|
vec_sort(v, cpio_cmp);
|
|
|
|
// Start comparing
|
|
size_t i = 0, j = 0;
|
|
while(i != vec_size(o) || j != vec_size(v)) {
|
|
backup = 0;
|
|
if (i != vec_size(o) && j != vec_size(v)) {
|
|
m = vec_entry(o)[i];
|
|
n = vec_entry(v)[j];
|
|
res = strcmp(m->filename, n->filename);
|
|
} else if (i == vec_size(o)) {
|
|
n = vec_entry(v)[j];
|
|
res = 1;
|
|
} else if (j == vec_size(v)) {
|
|
m = vec_entry(o)[i];
|
|
res = -1;
|
|
}
|
|
|
|
if (res < 0) {
|
|
// Something is missing in new ramdisk, backup!
|
|
++i;
|
|
backup = 1;
|
|
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 = 1;
|
|
fprintf(stderr, "Backup mismatch entry: ");
|
|
} else {
|
|
// Something new in ramdisk, record in rem
|
|
++j;
|
|
rem->data = xrealloc(rem->data, rem->filesize + strlen(n->filename) + 1);
|
|
memcpy(rem->data + rem->filesize, n->filename, strlen(n->filename) + 1);
|
|
rem->filesize += strlen(n->filename) + 1;
|
|
fprintf(stderr, "Record new entry: [%s] -> [.backup/.rmlist]\n", n->filename);
|
|
}
|
|
if (backup) {
|
|
sprintf(buf, ".backup/%s", m->filename);
|
|
fprintf(stderr, "[%s] -> [%s]\n", m->filename, buf);
|
|
free(m->filename);
|
|
m->filename = strdup(buf);
|
|
vec_push_back(bak, m);
|
|
// NULL the original entry, so it won't be freed
|
|
vec_entry(o)[i - 1] = NULL;
|
|
}
|
|
}
|
|
|
|
if (rem->filesize)
|
|
vec_push_back(bak, rem);
|
|
else
|
|
cpio_free(rem);
|
|
|
|
// Cleanup
|
|
cpio_vec_destroy(o);
|
|
}
|
|
|
|
static void cpio_restore(struct vector *v) {
|
|
cpio_entry *e;
|
|
vec_for_each(v, e) {
|
|
if (!e) continue;
|
|
if (strncmp(e->filename, ".backup", 7) == 0) {
|
|
if (e->filename[7] == '\0') continue;
|
|
if (e->filename[8] == '.') {
|
|
if (strcmp(e->filename, ".backup/.rmlist") == 0) {
|
|
for (int pos = 0; pos < e->filesize; pos += strlen(e->data + pos) + 1)
|
|
cpio_rm(v, 0, e->data + pos);
|
|
}
|
|
continue;
|
|
} else {
|
|
fprintf(stderr, "Restore [%s] -> [%s]\n", e->filename, e->filename + 8);
|
|
vec_cur(v) = NULL;
|
|
char *new_name = strdup(e->filename + 8);
|
|
free(e->filename);
|
|
e->filename = new_name;
|
|
cpio_vec_insert(v, e);
|
|
}
|
|
}
|
|
}
|
|
// Some known stuff we can remove
|
|
cpio_rm(v, 1, ".backup");
|
|
cpio_rm(v, 1, "overlay");
|
|
cpio_rm(v, 0, "sbin/magic_mask.sh");
|
|
cpio_rm(v, 0, "init.magisk.rc");
|
|
cpio_rm(v, 0, "magisk");
|
|
cpio_rm(v, 0, "ramdisk-recovery.xz");
|
|
}
|
|
|
|
static void restore_high_compress(struct vector *v, const char *incpio) {
|
|
// Check if the ramdisk is in high compression mode
|
|
if (cpio_extract(v, "ramdisk.cpio.xz", incpio) == 0) {
|
|
void *xz;
|
|
size_t size;
|
|
full_read(incpio, &xz, &size);
|
|
int fd = creat(incpio, 0644);
|
|
lzma(0, fd, xz, size);
|
|
close(fd);
|
|
free(xz);
|
|
cpio_rm(v, 0, "ramdisk.cpio.xz");
|
|
cpio_rm(v, 0, "init");
|
|
struct vector vv;
|
|
vec_init(&vv);
|
|
parse_cpio(&vv, incpio);
|
|
cpio_entry *e;
|
|
vec_for_each(&vv, e)
|
|
vec_push_back(v, e);
|
|
vec_destroy(&vv);
|
|
}
|
|
}
|
|
|
|
static void enable_high_compress(struct vector *v, struct vector *b, const char *incpio) {
|
|
cpio_entry *init, *magiskinit;
|
|
|
|
// Swap magiskinit with original init
|
|
int i = cpio_find(b, ".backup/init"), j = cpio_find(v, "init");
|
|
init = vec_entry(b)[i];
|
|
magiskinit = vec_entry(v)[j];
|
|
free(init->filename);
|
|
init->filename = strdup("init");
|
|
vec_entry(v)[j] = init;
|
|
vec_entry(b)[i] = NULL;
|
|
|
|
dump_cpio(v, incpio);
|
|
cpio_vec_destroy(v);
|
|
void *cpio;
|
|
size_t size;
|
|
full_read(incpio, &cpio, &size);
|
|
int fd = creat(incpio, 0644);
|
|
lzma(1, fd, cpio, size);
|
|
close(fd);
|
|
free(cpio);
|
|
vec_init(v);
|
|
vec_push_back(v, magiskinit);
|
|
cpio_add(v, 0, "ramdisk.cpio.xz", incpio);
|
|
}
|
|
|
|
int cpio_commands(int argc, char *argv[]) {
|
|
char *incpio = argv[0];
|
|
++argv;
|
|
--argc;
|
|
|
|
struct vector v;
|
|
vec_init(&v);
|
|
parse_cpio(&v, incpio);
|
|
|
|
int cmdc;
|
|
char *cmdv[6];
|
|
|
|
while (argc) {
|
|
cmdc = 0;
|
|
for (char *tok = strtok(argv[0], " "); tok; tok = strtok(NULL, " "))
|
|
cmdv[cmdc++] = tok;
|
|
|
|
if (strcmp(cmdv[0], "test") == 0) {
|
|
exit(cpio_test(&v));
|
|
} else if (strcmp(cmdv[0], "restore") == 0) {
|
|
restore_high_compress(&v, incpio);
|
|
cpio_restore(&v);
|
|
} else if (strcmp(cmdv[0], "sha1") == 0) {
|
|
char *sha1 = cpio_sha1(&v);
|
|
if (sha1)
|
|
printf("%s\n", sha1);
|
|
return 0;
|
|
} else if (cmdc >= 2 && strcmp(cmdv[0], "backup") == 0) {
|
|
struct vector back;
|
|
vec_init(&back);
|
|
cpio_backup(&v, &back, cmdv[1], cmdc > 2 ? cmdv[2] : NULL);
|
|
cpio_entry *e;
|
|
vec_for_each(&back, e)
|
|
if (e) vec_push_back(&v, e);
|
|
vec_destroy(&back);
|
|
} else if (cmdc >= 5 && strcmp(cmdv[0], "magisk") == 0) {
|
|
cpio_patch(&v, strcmp(cmdv[3], "true") == 0, strcmp(cmdv[4], "true") == 0);
|
|
|
|
struct vector back;
|
|
vec_init(&back);
|
|
cpio_backup(&v, &back, cmdv[1], cmdc > 5 ? cmdv[5] : NULL);
|
|
|
|
cpio_entry *e;
|
|
e = xcalloc(sizeof(*e), 1);
|
|
e->filename = strdup(".backup/.magisk");
|
|
e->mode = S_IFREG;
|
|
e->data = xmalloc(50);
|
|
snprintf(e->data, 50, "KEEPVERITY=%s\nKEEPFORCEENCRYPT=%s\n", cmdv[3], cmdv[4]);
|
|
e->filesize = strlen(e->data) + 1;
|
|
vec_push_back(&back, e);
|
|
|
|
// Enable high compression mode
|
|
if (strcmp(cmdv[2], "true") == 0)
|
|
enable_high_compress(&v, &back, incpio);
|
|
|
|
vec_for_each(&back, e)
|
|
if (e) vec_push_back(&v, e);
|
|
vec_destroy(&back);
|
|
} else if (cmdc >= 2 && strcmp(cmdv[0], "rm") == 0) {
|
|
int recur = cmdc > 2 && strcmp(cmdv[1], "-r") == 0;
|
|
cpio_rm(&v, recur, cmdv[1 + recur]);
|
|
} else if (cmdc == 3 && strcmp(cmdv[0], "mv") == 0) {
|
|
cpio_mv(&v, cmdv[1], cmdv[2]);
|
|
} else if (cmdc == 3 && strcmp(cmdv[0], "patch") == 0) {
|
|
cpio_patch(&v, strcmp(cmdv[1], "true") == 0, strcmp(cmdv[2], "true") == 0);
|
|
} else if (strcmp(cmdv[0], "extract") == 0) {
|
|
if (cmdc == 3) {
|
|
return cpio_extract(&v, cmdv[1], cmdv[2]);
|
|
} else {
|
|
cpio_extract_all(&v);
|
|
return 0;
|
|
}
|
|
} else if (cmdc == 3 && strcmp(cmdv[0], "mkdir") == 0) {
|
|
cpio_mkdir(&v, strtoul(cmdv[1], NULL, 8), cmdv[2]);
|
|
} else if (cmdc == 3 && strcmp(cmdv[0], "ln") == 0) {
|
|
cpio_ln(&v, cmdv[1], cmdv[2]);
|
|
} else if (cmdc == 4 && strcmp(cmdv[0], "add") == 0) {
|
|
cpio_add(&v, strtoul(cmdv[1], NULL, 8), cmdv[2], cmdv[3]);
|
|
} else {
|
|
return 1;
|
|
}
|
|
|
|
--argc;
|
|
++argv;
|
|
}
|
|
|
|
dump_cpio(&v, incpio);
|
|
cpio_vec_destroy(&v);
|
|
return 0;
|
|
}
|