214 lines
7.6 KiB
C
214 lines
7.6 KiB
C
/* $NetBSD: intercept.h,v 1.20 2006/12/10 01:22:02 christos Exp $ */
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/* $OpenBSD: intercept.h,v 1.11 2002/08/04 04:15:50 provos Exp $ */
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/*
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* Copyright 2002 Niels Provos <provos@citi.umich.edu>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Niels Provos.
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* 4. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _INTERCEPT_H_
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#define _INTERCEPT_H_
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#include <sys/param.h>
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#include <sys/queue.h>
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struct intercept_pid;
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struct intercept_replace;
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struct elevate;
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struct intercept_system {
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const char *name;
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int (*init)(void);
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int (*open)(void);
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int (*attach)(int, pid_t);
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int (*detach)(int, pid_t);
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int (*report)(int, pid_t);
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int (*read)(int);
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int (*getsyscallnumber)(const char *, const char *);
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int (*setcwd)(int, pid_t);
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int (*restcwd)(int);
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int (*io)(int, pid_t, int, void *, u_char *, size_t);
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int (*getarg)(int, void *, int, void **);
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int (*answer)(int, pid_t, u_int32_t, short, int, short,
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struct elevate *);
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int (*newpolicy)(int);
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int (*assignpolicy)(int, pid_t, int);
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int (*policy)(int, int, int, short);
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int (*replace)(int, pid_t, u_int16_t, struct intercept_replace *);
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void (*clonepid)(struct intercept_pid *, struct intercept_pid *);
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void (*freepid)(struct intercept_pid *);
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int (*scriptname)(int, pid_t, char *);
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};
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#define INTERCEPT_READ 1
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#define INTERCEPT_WRITE 2
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#define ICPOLICY_ASK 0
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#define ICPOLICY_PERMIT -1
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#define ICPOLICY_KILL -2
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#define ICPOLICY_NEVER 1 /* overloaded with errno values > 1 */
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#define ICLINK_NONE 0 /* do not resolve symlinks */
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#define ICLINK_ALL 1 /* resolve all symlinks */
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#define ICLINK_NOLAST 2 /* do not resolve last component */
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#define ICFLAGS_RESULT 1
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#define ICTRANS_NOLINKS 1 /* translation should have no symlinks */
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/* Privilege elevation */
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struct elevate {
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#define ELEVATE_UID 0x01
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#define ELEVATE_GID 0x02
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int e_flags;
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uid_t e_uid;
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gid_t e_gid;
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};
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struct intercept_pid {
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SPLAY_ENTRY(intercept_pid) next;
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pid_t pid;
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pid_t ppid; /* parent pid */
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short policynr;
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int execve_code;
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short execve_policy;
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char *name; /* name of current process image */
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char *newname; /* image name to be committed by execve */
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uid_t uid; /* current uid */
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gid_t gid; /* current gid */
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char username[LOGIN_NAME_MAX];
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char home[MAXPATHLEN]; /* current home dir for uid */
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void *data;
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int uflags; /* Flags that can be used by external application */
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struct elevate *elevate; /* privilege elevation request */
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};
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#define INTERCEPT_MAXSYSCALLNR 512
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#define INTERCEPT_MAXSYSCALLARGS 10
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struct intercept_translate {
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const char *name;
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int (*translate)(struct intercept_translate *, int, pid_t, void *);
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int (*print)(char *, size_t, struct intercept_translate *);
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int off2;
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int off;
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u_char trans_valid;
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void *trans_addr;
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void *trans_addr2;
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void *trans_data;
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size_t trans_size;
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char *trans_print;
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u_int trans_flags;
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void *user;
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TAILQ_ENTRY(intercept_translate) next;
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};
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struct intercept_replace {
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int num;
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int ind[INTERCEPT_MAXSYSCALLARGS];
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u_char *address[INTERCEPT_MAXSYSCALLARGS];
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size_t len[INTERCEPT_MAXSYSCALLARGS];
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u_int flags[INTERCEPT_MAXSYSCALLARGS];
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};
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TAILQ_HEAD(intercept_tlq, intercept_translate);
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int intercept_init(void);
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pid_t intercept_run(int, int, uid_t, gid_t, char *, char * const *);
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int intercept_open(void);
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int intercept_attach(int, pid_t);
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int intercept_attachpid(int, pid_t, char *);
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int intercept_detach(int, pid_t);
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int intercept_read(int);
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int intercept_newpolicy(int);
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int intercept_assignpolicy(int, pid_t, int);
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int intercept_modifypolicy(int, int, const char *, const char *, short);
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int intercept_modifypolicy_nr(int, int, int, short);
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void intercept_child_info(pid_t, pid_t);
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void intercept_policy_free(int);
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int intercept_replace_init(struct intercept_replace *);
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int intercept_replace_add(struct intercept_replace *, int, u_char *, size_t, u_int);
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int intercept_replace(int, pid_t, u_int16_t, struct intercept_replace *);
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int intercept_register_sccb(const char *, const char *,
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short (*)(int, pid_t, int, const char *, int, const char *, void *, int,
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struct intercept_replace *, struct intercept_tlq *, void *),
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void *);
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void *intercept_sccb_cbarg(char *, char *);
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int intercept_register_gencb(short (*)(int, pid_t, int, const char *, int, const char *, void *, int, void *), void *);
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int intercept_register_execcb(void (*)(int, pid_t, int, const char *, const char *, void *), void *);
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int intercept_register_pfreecb(void (*)(int, void *), void *);
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struct intercept_translate *intercept_register_translation(const char *,
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const char *, int, struct intercept_translate *);
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int intercept_translate(struct intercept_translate *, int, pid_t, int, void *, int);
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const char *intercept_translate_print(struct intercept_translate *);
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#define intercept_register_transstring(x,y,z) \
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intercept_register_translation(x, y, z, &ic_translate_string)
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#define intercept_register_transfn(x,y,z) \
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intercept_register_translation(x, y, z, &ic_translate_filename)
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#define intercept_register_translink(x,y,z) \
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intercept_register_translation(x, y, z, &ic_translate_linkname)
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extern struct intercept_translate ic_translate_string;
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extern struct intercept_translate ic_translate_filename;
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extern struct intercept_translate ic_translate_linkname;
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extern struct intercept_translate ic_translate_unlinkname;
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extern struct intercept_translate ic_translate_connect;
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extern struct intercept_translate ic_translate_sendmsg;
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void intercept_freepid(pid_t);
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struct intercept_pid *intercept_findpid(pid_t);
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struct intercept_pid *intercept_getpid(pid_t);
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int intercept_existpids(void);
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char *intercept_get_string(int, pid_t, void *);
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char *normalize_filename(int, pid_t, char *, int);
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char *intercept_filename(int, pid_t, void *, int, char *);
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void intercept_syscall(int, pid_t, u_int16_t, int, const char *, int,
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const char *, void *, int);
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void intercept_syscall_result(int, pid_t, u_int16_t, int, const char *, int,
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const char *, void *, int, int, void *);
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void intercept_newimage(int, pid_t, int, const char *, char *,
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struct intercept_pid *);
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void intercept_ugid(struct intercept_pid *, uid_t, gid_t);
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void intercept_setpid(struct intercept_pid *, uid_t, gid_t);
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int intercept_getsyscallnumber(const char *, const char *);
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int intercept_isvalidsystemcall(const char *, const char *);
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char *intercept_realpath(const char *, char *);
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#endif /* _INTERCEPT_H_ */
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