Add dynamic signature support

kernel/apk_sign.h

@@ -2,7 +2,19 @@
 #define __KSU_H_APK_V2_SIGN
 
 #include <linux/types.h>
+#include "ksu.h"
 
 bool ksu_is_manager_apk(char *path);
 
-#endif
+struct dynamic_sign_config {
+    unsigned int size;
+    char hash[65];
+    int is_set;
+};
+
+int ksu_handle_dynamic_sign(struct dynamic_sign_user_config *config);
+void ksu_dynamic_sign_init(void);
+void ksu_dynamic_sign_exit(void);
+bool ksu_load_dynamic_sign(void);
+
+#endif