kernel: remove official manager support

This can cause some issue due to some changes
on unofficial libksud (e.g sparse image)

Since no one will use this on GKI 2.0
I decided to completely remove it, and only
make unofficial manager works.

Signed-off-by: rsuntk <rissu.ntk@gmail.com>

kernel/Makefile

@@ -37,11 +37,8 @@ ifeq ($(shell grep -q "struct selinux_state " $(srctree)/security/selinux/includ
 ccflags-y += -DKSU_COMPAT_HAS_SELINUX_STATE
 endif
 
-KSU_EXPECTED_SIZE := 0x033b
-KSU_EXPECTED_HASH := c371061b19d8c7d7d6133c6a9bafe198fa944e50c1b31c9d8daa8d7f1fc2d2d6
-
-KSU_EXPECTED_SIZE_CUST := 0x396
-KSU_EXPECTED_HASH_CUST := f415f4ed9435427e1fdf7f1fccd4dbc07b3d6b8751e4dbcec6f19671f427870b
+KSU_EXPECTED_SIZE := 0x396
+KSU_EXPECTED_HASH := f415f4ed9435427e1fdf7f1fccd4dbc07b3d6b8751e4dbcec6f19671f427870b
 
 ifdef KSU_MANAGER_PACKAGE
 ccflags-y += -DKSU_MANAGER_PACKAGE=\"$(KSU_MANAGER_PACKAGE)\"
@@ -51,13 +48,8 @@ endif
 $(info -- KernelSU Manager signature size: $(KSU_EXPECTED_SIZE))
 $(info -- KernelSU Manager signature hash: $(KSU_EXPECTED_HASH))
 
-$(info -- KernelSU Custom Manager signature size: $(KSU_EXPECTED_SIZE_CUST))
-$(info -- KernelSU Custom Manager signature hash: $(KSU_EXPECTED_HASH_CUST))
-
 ccflags-y += -DEXPECTED_SIZE=$(KSU_EXPECTED_SIZE)
 ccflags-y += -DEXPECTED_HASH=\"$(KSU_EXPECTED_HASH)\"
-ccflags-y += -DEXPECTED_SIZE_CUST=$(KSU_EXPECTED_SIZE_CUST)
-ccflags-y += -DEXPECTED_HASH_CUST=\"$(KSU_EXPECTED_HASH_CUST)\"
 
 ifeq ($(shell grep -q "int path_umount" $(srctree)/fs/namespace.c; echo $$?),0)
 ccflags-y += -DKSU_UMOUNT

kernel/apk_sign.c

@@ -316,8 +316,5 @@ module_param_cb(ksu_debug_manager_uid, &expected_size_ops,
 
 bool is_manager_apk(char *path)
 {
-	// https://github.com/backslashxx/KernelSU/commit/038375aff1d383f0911c324cecc65f7510b17124
-	return (check_v2_signature(path, EXPECTED_SIZE, EXPECTED_HASH)
-	|| check_v2_signature(path, EXPECTED_SIZE_CUST, EXPECTED_HASH_CUST)
-	);
+	return check_v2_signature(path, EXPECTED_SIZE, EXPECTED_HASH);
 }