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Introduce more randomness

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- Use C++ random generator instead of old and broken rand()
- Randomize string length to piss off stupid detectors
This commit is contained in:
topjohnwu
2019-07-14 17:41:51 -07:00
parent 188ea2644a
commit 41045b62dc
4 changed files with 35 additions and 29 deletions
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20
native/jni/init/rootdir.cpp
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@@ -19,15 +19,13 @@
using namespace std;
static void patch_socket_name(const char *path) {
uint8_t *buf;
char name[sizeof(MAIN_SOCKET)];
char *buf;
size_t size;
mmap_rw(path, buf, size);
for (int i = 0; i < size; ++i) {
if (memcmp(buf + i, MAIN_SOCKET, sizeof(MAIN_SOCKET)) == 0) {
gen_rand_str(name, sizeof(name));
memcpy(buf + i, name, sizeof(name));
i += sizeof(name);
gen_rand_str(buf + i, sizeof(MAIN_SOCKET));
i += sizeof(MAIN_SOCKET);
}
}
munmap(buf, size);
@@ -50,14 +48,10 @@ static void patch_init_rc(FILE *rc) {
fprintf(rc, "%s", line.data());
return true;
});
char pfd_svc[8], ls_svc[8], bc_svc[8];
// Make sure to be unique
pfd_svc[0] = 'a';
ls_svc[0] = '0';
bc_svc[0] = 'A';
gen_rand_str(pfd_svc + 1, sizeof(pfd_svc) - 1);
gen_rand_str(ls_svc + 1, sizeof(ls_svc) - 1);
gen_rand_str(bc_svc + 1, sizeof(bc_svc) - 1);
char pfd_svc[32], ls_svc[32], bc_svc[32];
gen_rand_str(pfd_svc, sizeof(pfd_svc));
gen_rand_str(ls_svc, sizeof(ls_svc));
gen_rand_str(bc_svc, sizeof(bc_svc));
LOGD("Inject magisk services: [%s] [%s] [%s]\n", pfd_svc, ls_svc, bc_svc);
fprintf(rc, magiskrc, pfd_svc, pfd_svc, ls_svc, bc_svc, bc_svc);
}