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Edit File : label.h \| Size : 5.84 KB
/* * Labeling interface for userspace object managers and others. * * Author : Eamon Walsh <ewalsh@tycho.nsa.gov> / #ifndef _SELABEL_H_ #define _SELABEL_H_ #include <stdbool.h> #include <sys/types.h> #include <selinux/selinux.h> #ifdef __cplusplus extern "C" { #endif / * Opaque type used for all label handles. / struct selabel_handle; / * Available backends. / / file contexts / #define SELABEL_CTX_FILE 0 / media contexts / #define SELABEL_CTX_MEDIA 1 / x contexts / #define SELABEL_CTX_X 2 / db objects / #define SELABEL_CTX_DB 3 / Android property service contexts / #define SELABEL_CTX_ANDROID_PROP 4 / Android service contexts / #define SELABEL_CTX_ANDROID_SERVICE 5 / * Available options / / no-op option, useful for unused slots in an array of options / #define SELABEL_OPT_UNUSED 0 / validate contexts before returning them (boolean value) / #define SELABEL_OPT_VALIDATE 1 / don't use local customizations to backend data (boolean value) / #define SELABEL_OPT_BASEONLY 2 / specify an alternate path to use when loading backend data / #define SELABEL_OPT_PATH 3 / select a subset of the search space as an optimization (file backend) / #define SELABEL_OPT_SUBSET 4 / require a hash calculation on spec files / #define SELABEL_OPT_DIGEST 5 / total number of options / #define SELABEL_NOPT 6 / * Label operations / /* * selabel_open - Create a labeling handle. * @backend: one of the constants specifying a supported labeling backend. * @opts: array of selabel_opt structures specifying label options or NULL. * @nopts: number of elements in opts array or zero for no options. * * Open a labeling backend for use. The available backend identifiers are * listed above. Options may be provided via the opts parameter; available * options are listed above. Not all options may be supported by every * backend. Return value is the created handle on success or NULL with * @errno set on failure. / struct selabel_handle selabel_open(unsigned int backend, const struct selinux_opt opts, unsigned nopts); /* * selabel_close - Close a labeling handle. * @handle: specifies handle to close * * Destroy the specified handle, closing files, freeing allocated memory, * etc. The handle may not be further used after it has been closed. / void selabel_close(struct selabel_handle handle); /** * selabel_lookup - Perform labeling lookup operation. * @handle: specifies backend instance to query * @con: returns the appropriate context with which to label the object * @key: string input to lookup operation * @type: numeric input to the lookup operation * * Perform a labeling lookup operation. Return %0 on success, -%1 with * @errno set on failure. The key and type arguments are the inputs to the * lookup operation; appropriate values are dictated by the backend in use. * The result is returned in the memory pointed to by @con and must be freed * by the user with freecon(). / int selabel_lookup(struct selabel_handle handle, char *con, const char key, int type); int selabel_lookup_raw(struct selabel_handle handle, char con, const char key, int type); bool selabel_partial_match(struct selabel_handle handle, const char key); int selabel_lookup_best_match(struct selabel_handle rec, char con, const char key, const char *aliases, int type); int selabel_lookup_best_match_raw(struct selabel_handle rec, char *con, const char key, const char aliases, int type); / * selabel_digest - Retrieve the SHA1 digest and the list of specfiles used to * generate the digest. The SELABEL_OPT_DIGEST option must * be set in selabel_open() to initiate the digest generation. * @handle: specifies backend instance to query * @digest: returns a pointer to the SHA1 digest. * @digest_len: returns length of digest in bytes. * @specfiles: a list of specfiles used in the SHA1 digest generation. * The list is NULL terminated and will hold @num_specfiles entries. * @num_specfiles: number of specfiles in the list. * * Return %0 on success, -%1 with @errno set on failure. / int selabel_digest(struct selabel_handle rec, unsigned char *digest, size_t digest_len, char **specfiles, size_t num_specfiles); enum selabel_cmp_result { SELABEL_SUBSET, SELABEL_EQUAL, SELABEL_SUPERSET, SELABEL_INCOMPARABLE }; /** * selabel_cmp - Compare two label configurations. * @h1: handle for the first label configuration * @h2: handle for the first label configuration * * Compare two label configurations. * Return %SELABEL_SUBSET if @h1 is a subset of @h2, %SELABEL_EQUAL * if @h1 is identical to @h2, %SELABEL_SUPERSET if @h1 is a superset * of @h2, and %SELABEL_INCOMPARABLE if @h1 and @h2 are incomparable. / enum selabel_cmp_result selabel_cmp(struct selabel_handle h1, struct selabel_handle h2); /* * selabel_stats - log labeling operation statistics. * @handle: specifies backend instance to query * * Log a message with information about the number of queries performed, * number of unused matching entries, or other operational statistics. * Message is backend-specific, some backends may not output a message. / void selabel_stats(struct selabel_handle handle); /* * Type codes used by specific backends / / X backend / #define SELABEL_X_PROP 1 #define SELABEL_X_EXT 2 #define SELABEL_X_CLIENT 3 #define SELABEL_X_EVENT 4 #define SELABEL_X_SELN 5 #define SELABEL_X_POLYPROP 6 #define SELABEL_X_POLYSELN 7 / DB backend / #define SELABEL_DB_DATABASE 1 #define SELABEL_DB_SCHEMA 2 #define SELABEL_DB_TABLE 3 #define SELABEL_DB_COLUMN 4 #define SELABEL_DB_SEQUENCE 5 #define SELABEL_DB_VIEW 6 #define SELABEL_DB_PROCEDURE 7 #define SELABEL_DB_BLOB 8 #define SELABEL_DB_TUPLE 9 #define SELABEL_DB_LANGUAGE 10 #define SELABEL_DB_EXCEPTION 11 #define SELABEL_DB_DATATYPE 12 #ifdef __cplusplus } #endif #endif / _SELABEL_H_ */ Back

Edit File : label.h | Size : 5.84 KB

/*
 * Labeling interface for userspace object managers and others.
 *
 * Author : Eamon Walsh <ewalsh@tycho.nsa.gov>
 */
#ifndef _SELABEL_H_
#define _SELABEL_H_

#include <stdbool.h>
#include <sys/types.h>
#include <selinux/selinux.h>

#ifdef __cplusplus
extern "C" {
#endif

/*
 * Opaque type used for all label handles.
 */

struct selabel_handle;

/* 
 * Available backends.
 */

/* file contexts */
#define SELABEL_CTX_FILE	0
/* media contexts */
#define SELABEL_CTX_MEDIA	1
/* x contexts */
#define SELABEL_CTX_X		2
/* db objects */
#define SELABEL_CTX_DB		3
/* Android property service contexts */
#define SELABEL_CTX_ANDROID_PROP 4
/* Android service contexts */
#define SELABEL_CTX_ANDROID_SERVICE 5

/*
 * Available options
 */

/* no-op option, useful for unused slots in an array of options */
#define SELABEL_OPT_UNUSED	0
/* validate contexts before returning them (boolean value) */
#define SELABEL_OPT_VALIDATE	1
/* don't use local customizations to backend data (boolean value) */
#define SELABEL_OPT_BASEONLY	2
/* specify an alternate path to use when loading backend data */
#define SELABEL_OPT_PATH	3
/* select a subset of the search space as an optimization (file backend) */
#define SELABEL_OPT_SUBSET	4
/* require a hash calculation on spec files */
#define SELABEL_OPT_DIGEST	5
/* total number of options */
#define SELABEL_NOPT		6

/*
 * Label operations
 */

/**
 * selabel_open - Create a labeling handle.
 * @backend: one of the constants specifying a supported labeling backend.
 * @opts: array of selabel_opt structures specifying label options or NULL.
 * @nopts: number of elements in opts array or zero for no options.
 *
 * Open a labeling backend for use.  The available backend identifiers are
 * listed above.  Options may be provided via the opts parameter; available
 * options are listed above.  Not all options may be supported by every
 * backend.  Return value is the created handle on success or NULL with
 * @errno set on failure.
 */
struct selabel_handle *selabel_open(unsigned int backend,
				    const struct selinux_opt *opts,
				    unsigned nopts);

/**
 * selabel_close - Close a labeling handle.
 * @handle: specifies handle to close
 *
 * Destroy the specified handle, closing files, freeing allocated memory,
 * etc.  The handle may not be further used after it has been closed.
 */
void selabel_close(struct selabel_handle *handle);

/**
 * selabel_lookup - Perform labeling lookup operation.
 * @handle: specifies backend instance to query
 * @con: returns the appropriate context with which to label the object
 * @key: string input to lookup operation
 * @type: numeric input to the lookup operation
 *
 * Perform a labeling lookup operation.  Return %0 on success, -%1 with
 * @errno set on failure.  The key and type arguments are the inputs to the
 * lookup operation; appropriate values are dictated by the backend in use.
 * The result is returned in the memory pointed to by @con and must be freed
 * by the user with freecon().
 */
int selabel_lookup(struct selabel_handle *handle, char **con,
		   const char *key, int type);
int selabel_lookup_raw(struct selabel_handle *handle, char **con,
		       const char *key, int type);

bool selabel_partial_match(struct selabel_handle *handle, const char *key);

int selabel_lookup_best_match(struct selabel_handle *rec, char **con,
			      const char *key, const char **aliases, int type);
int selabel_lookup_best_match_raw(struct selabel_handle *rec, char **con,
			      const char *key, const char **aliases, int type);

/**
 * selabel_digest - Retrieve the SHA1 digest and the list of specfiles used to
 *		    generate the digest. The SELABEL_OPT_DIGEST option must
 *		    be set in selabel_open() to initiate the digest generation.
 * @handle: specifies backend instance to query
 * @digest: returns a pointer to the SHA1 digest.
 * @digest_len: returns length of digest in bytes.
 * @specfiles: a list of specfiles used in the SHA1 digest generation.
 *	       The list is NULL terminated and will hold @num_specfiles entries.
 * @num_specfiles: number of specfiles in the list.
 *
 * Return %0 on success, -%1 with @errno set on failure.
 */
int selabel_digest(struct selabel_handle *rec,
			    unsigned char **digest, size_t *digest_len,
			    char ***specfiles, size_t *num_specfiles);

enum selabel_cmp_result {
	SELABEL_SUBSET,
	SELABEL_EQUAL,
	SELABEL_SUPERSET,
	SELABEL_INCOMPARABLE
};

/**
 * selabel_cmp - Compare two label configurations.
 * @h1: handle for the first label configuration
 * @h2: handle for the first label configuration
 *
 * Compare two label configurations.
 * Return %SELABEL_SUBSET if @h1 is a subset of @h2, %SELABEL_EQUAL
 * if @h1 is identical to @h2, %SELABEL_SUPERSET if @h1 is a superset
 * of @h2, and %SELABEL_INCOMPARABLE if @h1 and @h2 are incomparable.
 */
enum selabel_cmp_result selabel_cmp(struct selabel_handle *h1,
				    struct selabel_handle *h2);

/**
 * selabel_stats - log labeling operation statistics.
 * @handle: specifies backend instance to query
 *
 * Log a message with information about the number of queries performed,
 * number of unused matching entries, or other operational statistics.
 * Message is backend-specific, some backends may not output a message.
 */
void selabel_stats(struct selabel_handle *handle);

/*
 * Type codes used by specific backends
 */

/* X backend */
#define SELABEL_X_PROP		1
#define SELABEL_X_EXT		2
#define SELABEL_X_CLIENT	3
#define SELABEL_X_EVENT		4
#define SELABEL_X_SELN		5
#define SELABEL_X_POLYPROP	6
#define SELABEL_X_POLYSELN	7

/* DB backend */
#define SELABEL_DB_DATABASE	1
#define SELABEL_DB_SCHEMA	2
#define SELABEL_DB_TABLE	3
#define SELABEL_DB_COLUMN	4
#define SELABEL_DB_SEQUENCE	5
#define SELABEL_DB_VIEW		6
#define SELABEL_DB_PROCEDURE	7
#define SELABEL_DB_BLOB		8
#define SELABEL_DB_TUPLE	9
#define SELABEL_DB_LANGUAGE	10
#define SELABEL_DB_EXCEPTION 11
#define SELABEL_DB_DATATYPE 12

#ifdef __cplusplus
}
#endif
#endif	/* _SELABEL_H_ */

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