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#pragma once
#include <stdbool.h>
#include <sys/types.h>
#include <selinux/context.h>
#include <selinux/selinux.h>
#ifdef __cplusplus
extern "C" {
#endif
// Context files (file_contexts, service_contexts, etc) may be spread over
// multiple partitions: system, system_ext, product, vendor and/or odm.
#define MAX_CONTEXT_PATHS 5
// The maximum number of alternatives for a file on one partition.
#define MAX_ALT_CONTEXT_PATHS 2
typedef struct path_alts {
const char *paths[MAX_CONTEXT_PATHS][MAX_ALT_CONTEXT_PATHS];
const char *partitions[MAX_CONTEXT_PATHS];
} path_alts_t;
/* Within each set of files, adds the first file that is accessible to `paths`.
* Returns the number of accessible files. */
size_t find_existing_files(
const path_alts_t *path_sets,
const char *paths[MAX_CONTEXT_PATHS]);
/* Within each set of files, adds the first file that is accessible to `paths`.
* Returns the number of accessible files. Also returns the partitions where
* the files exist. */
size_t find_existing_files_with_partitions(
const path_alts_t *path_sets,
const char *paths[MAX_CONTEXT_PATHS],
const char *partitions[MAX_CONTEXT_PATHS]);
/* Converts an array of file paths into an array of options for selabel_open.
* opts must be at least as large as paths. */
void paths_to_opts(
const char* paths[MAX_CONTEXT_PATHS],
size_t npaths,
struct selinux_opt* const opts);
/* Initialize a backend using the specified options. Ensure that any error is
* reported to the android logging facility */
struct selabel_handle* initialize_backend(
unsigned int backend,
const char* name,
const struct selinux_opt* opts,
size_t nopts);
/* Initialize a backend using a set of context paths */
struct selabel_handle* context_handle(
unsigned int backend,
const path_alts_t *context_paths,
const char* name);
/* The kind of request when looking up an seapp_context. */
enum seapp_kind {
/* Returns the SELinux type for the app data directory */
SEAPP_TYPE,
/* Returns the SELinux type for the app process */
SEAPP_DOMAIN
};
/* Search an app (or its data) based on its name and information within the list
* of known seapp_contexts. If found, sets the type and categories of ctx and
* returns 0. Returns -1 in case of error; -2 for out of memory */
int seapp_context_lookup(enum seapp_kind kind,
uid_t uid,
bool isSystemServer,
const char *seinfo,
const char *pkgname,
context_t ctx);
/* Similar to seapp_context_lookup, but does not implicitly load and use the
* default context files. It should only be used for unit tests. */
int seapp_context_lookup_internal(enum seapp_kind kind,
uid_t uid,
bool isSystemServer,
const char *seinfo,
const char *pkgname,
context_t ctx);
/* Which categories should be associated to the process */
enum levelFrom {
/* None */
LEVELFROM_NONE,
/* The categories of the application */
LEVELFROM_APP,
/* The categories of the end-user */
LEVELFROM_USER,
/* Application and end-user */
LEVELFROM_ALL
};
/* Sets the categories of ctx based on the level request */
int set_range_from_level(context_t ctx, enum levelFrom levelFrom, uid_t userid, uid_t appid);
/* Similar to seapp_context_reload, but does not implicitly load the default
* context files. It should only be used for unit tests. */
int seapp_context_reload_internal(const path_alts_t *context_paths);
#define SEINFO_BUFSIZ 256
/* A parsed seinfo */
struct parsed_seinfo {
char base[SEINFO_BUFSIZ];
#define IS_PRIV_APP (1 << 0)
#define IS_FROM_RUN_AS (1 << 1)
#define IS_EPHEMERAL_APP (1 << 2)
#define IS_ISOLATED_COMPUTE_APP (1 << 3)
#define IS_SDK_SANDBOX_AUDIT (1 << 4)
#define IS_SDK_SANDBOX_NEXT (1 << 5)
int32_t is;
bool isPreinstalledApp;
char partition[SEINFO_BUFSIZ];
int32_t targetSdkVersion;
};
/* Parses an seinfo string. Returns -1 if an error occurred. */
int parse_seinfo(const char* seinfo, struct parsed_seinfo* info);
#ifdef __cplusplus
}
#endif
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