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New method of communication

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Introduce a new communication method between Magisk and Magisk Manager.

Magisk used to hardcode classnames and send broadcast/start activities to
specific components. This new method makes no assumption of any class names,
so Magisk Manager can easily be fully obfuscated.

In addition, the new method connects Magisk and Magisk Manager with random
abstract Linux sockets instead of socket files in filesystems, bypassing
file system complexities (selinux, permissions and such)
This commit is contained in:
topjohnwu
2018-09-16 04:16:18 -04:00
parent 4cf8d41f6a
commit 906b4aad9e
21 changed files with 655 additions and 705 deletions
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19
native/jni/su/su.h
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@@ -12,11 +12,6 @@
#include "list.h"
#define MAGISKSU_VER_STR xstr(MAGISK_VERSION) ":MAGISKSU (topjohnwu)"
// This is used if wrapping the fragment classes and activities
// with classes in another package.
#define REQUESTOR_PREFIX JAVA_PACKAGE_NAME ".superuser"
#define DEFAULT_SHELL "/system/bin/sh"
struct su_info {
@@ -49,7 +44,6 @@ struct su_context {
struct su_request to;
pid_t pid;
char cwd[PATH_MAX];
char sock_path[PATH_MAX];
int pipefd[2];
};
@@ -61,16 +55,11 @@ int su_daemon_main(int argc, char **argv);
__attribute__ ((noreturn)) void exit2(int status);
void set_identity(unsigned uid);
// su_client.c
// connect.c
int socket_create_temp(char *path, size_t len);
int socket_accept(int serv_fd);
void socket_send_request(int fd, const struct su_context *ctx);
void socket_receive_result(int fd, char *result, ssize_t result_len);
void app_log();
// activity.c
void app_send_result(struct su_context *ctx, policy_t policy);
void app_send_request(struct su_context *ctx);
void app_connect(const char *socket);
void socket_send_request(int fd);
#endif