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/* $OpenBSD: systrace.h,v 1.27 2006/07/02 12:34:15 sturm Exp $ */
/*
* Copyright 2002 Niels Provos <provos@citi.umich.edu>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Niels Provos.
* 4. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef _SYSTRACE_H_
#define _SYSTRACE_H_
#include <sys/queue.h>
#define _PATH_XSYSTRACE "/usr/X11R6/bin/xsystrace"
enum logicop { LOGIC_AND, LOGIC_OR, LOGIC_NOT, LOGIC_SINGLE };
struct logic {
enum logicop op;
struct logic *left;
struct logic *right;
char *type;
int typeoff;
int flags;
void *filterdata;
size_t filterlen;
int (*filter_match)(struct intercept_translate *, struct logic *);
void *filterarg;
};
#define LOGIC_NEEDEXPAND 0x01
struct filter {
TAILQ_ENTRY(filter) next;
TAILQ_ENTRY(filter) policy_next;
char *rule;
char name[32];
char emulation[16];
struct logic *logicroot;
short match_action;
int match_error;
int match_flags;
int match_count; /* Number of times this filter matched */
struct predicate {
#define PREDIC_UID 0x01
#define PREDIC_GID 0x02
#define PREDIC_NEGATIVE 0x10
#define PREDIC_LESSER 0x20
#define PREDIC_GREATER 0x30
#define PREDIC_MASK 0x30
int p_flags;
uid_t p_uid;
gid_t p_gid;
} match_predicate;
struct elevate elevate;
};
TAILQ_HEAD(filterq, filter);
struct policy_syscall {
SPLAY_ENTRY(policy_syscall) node;
char name[64];
char emulation[16];
struct filterq flq;
};
struct policy {
SPLAY_ENTRY(policy) node;
SPLAY_ENTRY(policy) nrnode;
const char *name;
char emulation[16];
struct timespec ts_last; /* last time we read the file */
SPLAY_HEAD(syscalltree, policy_syscall) pflqs;
int policynr; /* in-kernel policy number */
short kerneltable[INTERCEPT_MAXSYSCALLNR];
int flags;
struct filterq filters;
int nfilters; /* nr of installed policy statements */
struct filterq prefilters; /* filters we need to install*/
};
struct template {
TAILQ_ENTRY(template) next;
char *filename;
char *name;
char *description;
char *emulation;
};
TAILQ_HEAD(tmplqueue, template);
#define POLICY_PATH "/etc/systrace"
#define POLICY_UNSUPERVISED 0x01 /* Auto-Pilot */
#define POLICY_DETACHED 0x02 /* Ignore this program */
#define POLICY_CHANGED 0x04
#define PROCESS_INHERIT_POLICY 0x01 /* Process inherits policy */
#define PROCESS_DETACH 0x02 /* Process gets detached */
#define SYSCALL_LOG 0x04 /* Log this system call */
#define PROCESS_PROMPT 0x08 /* Prompt but nothing else */
#define SYSTRACE_UPDATETIME 30 /* update policies every 30 seconds */
void systrace_parameters(void);
int systrace_initpolicy(char *, char *);
void systrace_setupdir(char *);
struct template *systrace_readtemplate(char *, struct policy *,
struct template *);
void systrace_initcb(void);
struct policy *systrace_newpolicy(const char *, const char *);
void systrace_cleanpolicy(struct policy *);
void systrace_freepolicy(struct policy *);
int systrace_newpolicynr(int, struct policy *);
int systrace_modifypolicy(int, int, const char *, short);
struct policy *systrace_findpolicy(const char *);
struct policy *systrace_findpolicy_wildcard(const char *);
struct policy *systrace_findpolnr(int);
int systrace_dumppolicies(int);
int systrace_updatepolicies(int);
struct policy *systrace_readpolicy(const char *);
int systrace_addpolicy(const char *);
int systrace_updatepolicy(int fd, struct policy *policy);
struct filterq *systrace_policyflq(struct policy *, const char *, const char *);
char *systrace_getpolicyname(const char *);
int systrace_error_translate(char *);
#define SYSTRACE_MAXALIAS 10
struct systrace_alias {
SPLAY_ENTRY(systrace_alias) node;
TAILQ_ENTRY(systrace_alias) next;
char name[64];
char emulation[16];
char aname[64];
char aemul[16];
struct intercept_translate *arguments[SYSTRACE_MAXALIAS];
int nargs;
struct systrace_revalias *reverse;
};
int systrace_initalias(void);
struct systrace_alias *systrace_new_alias(const char *, const char *, char *, char *);
void systrace_switch_alias(const char *, const char *, char *, char *);
struct systrace_alias *systrace_find_alias(const char *, const char *);
void systrace_alias_add_trans(struct systrace_alias *,
struct intercept_translate *);
struct systrace_revalias {
SPLAY_ENTRY(systrace_revalias) node;
char name[64];
char emulation[16];
TAILQ_HEAD(revaliasq, systrace_alias) revl;
};
struct systrace_revalias *systrace_reverse(const char *, const char *);
struct systrace_revalias *systrace_find_reverse(const char *, const char *);
short filter_evaluate(struct intercept_tlq *, struct filterq *,
struct intercept_pid *);
short filter_ask(int, struct intercept_tlq *, struct filterq *, int,
const char *, const char *, char *, short *, struct intercept_pid *);
void filter_free(struct filter *);
void filter_modifypolicy(int, int, const char *, const char *, short);
int filter_predicate(struct intercept_pid *, struct predicate *);
int filter_parse_simple(char *, short *, short *);
int filter_parse(char *, struct filter **);
int filter_prepolicy(int, struct policy *);
char *filter_expand(char *);
char *filter_dynamicexpand(struct intercept_pid *, char *);
int filter_needexpand(char *);
void cradle_start(char *, char *, char *);
int parse_filter(char *, struct filter **);
char *uid_to_name(uid_t);
char *strrpl(char *, size_t, char *, char *);
void make_output(char *, size_t, const char *, pid_t, pid_t, int,
const char *, int, const char *, const char *, int, struct intercept_tlq *,
struct intercept_replace *);
short trans_cb(int, pid_t, int, const char *, int, const char *, void *,
int, struct intercept_replace *, struct intercept_tlq *, void *);
short gen_cb(int, pid_t, int, const char *, int, const char *, void *,
int, void *);
void execres_cb(int, pid_t, int, const char *, const char *, void *);
void policyfree_cb(int, void *);
extern struct intercept_translate ic_oflags;
extern struct intercept_translate ic_modeflags;
extern struct intercept_translate ic_fdt;
extern struct intercept_translate ic_uidt;
extern struct intercept_translate ic_uname;
extern struct intercept_translate ic_gidt;
extern struct intercept_translate ic_trargv;
extern struct intercept_translate ic_sockdom;
extern struct intercept_translate ic_socktype;
extern struct intercept_translate ic_pidname;
extern struct intercept_translate ic_signame;
extern struct intercept_translate ic_fcntlcmd;
extern struct intercept_translate ic_memprot;
extern struct intercept_translate ic_linux_memprot;
extern struct intercept_translate ic_fileflags;
extern struct intercept_translate ic_linux_oflags;
int requestor_start(char *, int);
#endif /* _SYSTRACE_H_ */
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