481 lines
15 KiB
C
481 lines
15 KiB
C
/*-
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* SPDX-License-Identifier: BSD-3-Clause
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*
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* Copyright (c) 1999-2005 Apple Inc.
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* Copyright (c) 2016-2018 Robert N. M. Watson
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* All rights reserved.
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*
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* This software was developed by BAE Systems, the University of Cambridge
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* Computer Laboratory, and Memorial University under DARPA/AFRL contract
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* FA8650-15-C-7558 ("CADETS"), as part of the DARPA Transparent Computing
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* (TC) research program.
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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. Neither the name of Apple Inc. ("Apple") nor the names of
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* its contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR
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* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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/*
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* This header includes function prototypes and type definitions that are
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* necessary for the kernel as a whole to interact with the audit subsystem.
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*/
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#ifndef _SECURITY_AUDIT_KERNEL_H_
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#define _SECURITY_AUDIT_KERNEL_H_
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#ifndef _KERNEL
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#error "no user-serviceable parts inside"
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#endif
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#include <bsm/audit.h>
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#include <sys/file.h>
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#include <sys/sysctl.h>
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/*
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* Audit subsystem condition flags. The audit_trail_enabled flag is set and
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* removed automatically as a result of configuring log files, and can be
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* observed but should not be directly manipulated. The audit suspension
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* flag permits audit to be temporarily disabled without reconfiguring the
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* audit target.
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*
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* As DTrace can also request system-call auditing, a further
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* audit_syscalls_enabled flag tracks whether newly entering system calls
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* should be considered for auditing or not.
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*
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* XXXRW: Move trail flags to audit_private.h, as they no longer need to be
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* visible outside the audit code...?
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*/
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extern u_int audit_dtrace_enabled;
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extern int audit_trail_enabled;
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extern int audit_trail_suspended;
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extern bool audit_syscalls_enabled;
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void audit_syscall_enter(unsigned short code, struct thread *td);
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void audit_syscall_exit(int error, struct thread *td);
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/*
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* The remaining kernel functions are conditionally compiled in as they are
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* wrapped by a macro, and the macro should be the only place in the source
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* tree where these functions are referenced.
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*/
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#ifdef AUDIT
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struct ipc_perm;
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struct sockaddr;
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union auditon_udata;
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void audit_arg_addr(void * addr);
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void audit_arg_exit(int status, int retval);
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void audit_arg_len(int len);
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void audit_arg_atfd1(int atfd);
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void audit_arg_atfd2(int atfd);
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void audit_arg_fd(int fd);
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void audit_arg_fflags(int fflags);
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void audit_arg_gid(gid_t gid);
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void audit_arg_uid(uid_t uid);
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void audit_arg_egid(gid_t egid);
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void audit_arg_euid(uid_t euid);
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void audit_arg_rgid(gid_t rgid);
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void audit_arg_ruid(uid_t ruid);
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void audit_arg_sgid(gid_t sgid);
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void audit_arg_suid(uid_t suid);
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void audit_arg_groupset(gid_t *gidset, u_int gidset_size);
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void audit_arg_login(char *login);
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void audit_arg_ctlname(int *name, int namelen);
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void audit_arg_mask(int mask);
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void audit_arg_mode(mode_t mode);
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void audit_arg_dev(int dev);
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void audit_arg_value(long value);
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void audit_arg_owner(uid_t uid, gid_t gid);
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void audit_arg_pid(pid_t pid);
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void audit_arg_process(struct proc *p);
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void audit_arg_signum(u_int signum);
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void audit_arg_socket(int sodomain, int sotype, int soprotocol);
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void audit_arg_sockaddr(struct thread *td, int dirfd, struct sockaddr *sa);
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void audit_arg_auid(uid_t auid);
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void audit_arg_auditinfo(struct auditinfo *au_info);
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void audit_arg_auditinfo_addr(struct auditinfo_addr *au_info);
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void audit_arg_upath1(struct thread *td, int dirfd, char *upath);
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void audit_arg_upath1_canon(char *upath);
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void audit_arg_upath2(struct thread *td, int dirfd, char *upath);
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void audit_arg_upath2_canon(char *upath);
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void audit_arg_upath1_vp(struct thread *td, struct vnode *rdir,
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struct vnode *cdir, char *upath);
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void audit_arg_upath2_vp(struct thread *td, struct vnode *rdir,
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struct vnode *cdir, char *upath);
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void audit_arg_vnode1(struct vnode *vp);
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void audit_arg_vnode2(struct vnode *vp);
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void audit_arg_text(const char *text);
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void audit_arg_cmd(int cmd);
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void audit_arg_svipc_cmd(int cmd);
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void audit_arg_svipc_perm(struct ipc_perm *perm);
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void audit_arg_svipc_id(int id);
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void audit_arg_svipc_addr(void *addr);
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void audit_arg_svipc_which(int which);
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void audit_arg_posix_ipc_perm(uid_t uid, gid_t gid, mode_t mode);
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void audit_arg_auditon(union auditon_udata *udata);
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void audit_arg_file(struct proc *p, struct file *fp);
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void audit_arg_argv(char *argv, int argc, int length);
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void audit_arg_envv(char *envv, int envc, int length);
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void audit_arg_rights(cap_rights_t *rightsp);
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void audit_arg_fcntl_rights(uint32_t fcntlrights);
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void audit_sysclose(struct thread *td, int fd, struct file *fp);
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void audit_cred_copy(struct ucred *src, struct ucred *dest);
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void audit_cred_destroy(struct ucred *cred);
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void audit_cred_init(struct ucred *cred);
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void audit_cred_kproc0(struct ucred *cred);
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void audit_cred_proc1(struct ucred *cred);
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void audit_proc_coredump(struct thread *td, char *path, int errcode);
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void audit_thread_alloc(struct thread *td);
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void audit_thread_free(struct thread *td);
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/*
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* Define macros to wrap the audit_arg_* calls by checking the global
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* audit_syscalls_enabled flag before performing the actual call.
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*/
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#define AUDITING_TD(td) (__predict_false((td)->td_pflags & TDP_AUDITREC))
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#define AUDIT_ARG_ADDR(addr) do { \
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if (AUDITING_TD(curthread)) \
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audit_arg_addr((addr)); \
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} while (0)
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#define AUDIT_ARG_ARGV(argv, argc, length) do { \
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if (AUDITING_TD(curthread)) \
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audit_arg_argv((argv), (argc), (length)); \
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} while (0)
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#define AUDIT_ARG_ATFD1(atfd) do { \
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if (AUDITING_TD(curthread)) \
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audit_arg_atfd1((atfd)); \
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} while (0)
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#define AUDIT_ARG_ATFD2(atfd) do { \
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if (AUDITING_TD(curthread)) \
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audit_arg_atfd2((atfd)); \
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} while (0)
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#define AUDIT_ARG_AUDITON(udata) do { \
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if (AUDITING_TD(curthread)) \
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audit_arg_auditon((udata)); \
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} while (0)
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#define AUDIT_ARG_CMD(cmd) do { \
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if (AUDITING_TD(curthread)) \
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audit_arg_cmd((cmd)); \
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} while (0)
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#define AUDIT_ARG_DEV(dev) do { \
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if (AUDITING_TD(curthread)) \
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audit_arg_dev((dev)); \
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} while (0)
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#define AUDIT_ARG_EGID(egid) do { \
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if (AUDITING_TD(curthread)) \
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audit_arg_egid((egid)); \
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} while (0)
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#define AUDIT_ARG_ENVV(envv, envc, length) do { \
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if (AUDITING_TD(curthread)) \
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audit_arg_envv((envv), (envc), (length)); \
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} while (0)
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#define AUDIT_ARG_EXIT(status, retval) do { \
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if (AUDITING_TD(curthread)) \
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audit_arg_exit((status), (retval)); \
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} while (0)
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#define AUDIT_ARG_EUID(euid) do { \
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if (AUDITING_TD(curthread)) \
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audit_arg_euid((euid)); \
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} while (0)
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#define AUDIT_ARG_FD(fd) do { \
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if (AUDITING_TD(curthread)) \
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audit_arg_fd((fd)); \
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} while (0)
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#define AUDIT_ARG_FILE(p, fp) do { \
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if (AUDITING_TD(curthread)) \
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audit_arg_file((p), (fp)); \
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} while (0)
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#define AUDIT_ARG_FFLAGS(fflags) do { \
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if (AUDITING_TD(curthread)) \
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audit_arg_fflags((fflags)); \
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} while (0)
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#define AUDIT_ARG_GID(gid) do { \
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if (AUDITING_TD(curthread)) \
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audit_arg_gid((gid)); \
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} while (0)
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#define AUDIT_ARG_GROUPSET(gidset, gidset_size) do { \
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if (AUDITING_TD(curthread)) \
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audit_arg_groupset((gidset), (gidset_size)); \
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} while (0)
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#define AUDIT_ARG_LOGIN(login) do { \
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if (AUDITING_TD(curthread)) \
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audit_arg_login((login)); \
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} while (0)
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#define AUDIT_ARG_MODE(mode) do { \
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if (AUDITING_TD(curthread)) \
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audit_arg_mode((mode)); \
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} while (0)
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#define AUDIT_ARG_OWNER(uid, gid) do { \
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if (AUDITING_TD(curthread)) \
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audit_arg_owner((uid), (gid)); \
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} while (0)
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#define AUDIT_ARG_PID(pid) do { \
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if (AUDITING_TD(curthread)) \
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audit_arg_pid((pid)); \
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} while (0)
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#define AUDIT_ARG_POSIX_IPC_PERM(uid, gid, mode) do { \
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if (AUDITING_TD(curthread)) \
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audit_arg_posix_ipc_perm((uid), (gid), (mod)); \
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} while (0)
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#define AUDIT_ARG_PROCESS(p) do { \
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if (AUDITING_TD(curthread)) \
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audit_arg_process((p)); \
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} while (0)
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#define AUDIT_ARG_RGID(rgid) do { \
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if (AUDITING_TD(curthread)) \
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audit_arg_rgid((rgid)); \
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} while (0)
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#define AUDIT_ARG_RIGHTS(rights) do { \
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if (AUDITING_TD(curthread)) \
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audit_arg_rights((rights)); \
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} while (0)
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#define AUDIT_ARG_FCNTL_RIGHTS(fcntlrights) do { \
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if (AUDITING_TD(curthread)) \
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audit_arg_fcntl_rights((fcntlrights)); \
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} while (0)
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#define AUDIT_ARG_RUID(ruid) do { \
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if (AUDITING_TD(curthread)) \
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audit_arg_ruid((ruid)); \
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} while (0)
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#define AUDIT_ARG_SIGNUM(signum) do { \
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if (AUDITING_TD(curthread)) \
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audit_arg_signum((signum)); \
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} while (0)
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#define AUDIT_ARG_SGID(sgid) do { \
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if (AUDITING_TD(curthread)) \
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audit_arg_sgid((sgid)); \
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} while (0)
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#define AUDIT_ARG_SOCKET(sodomain, sotype, soprotocol) do { \
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if (AUDITING_TD(curthread)) \
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audit_arg_socket((sodomain), (sotype), (soprotocol)); \
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} while (0)
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#define AUDIT_ARG_SOCKADDR(td, dirfd, sa) do { \
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if (AUDITING_TD(curthread)) \
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audit_arg_sockaddr((td), (dirfd), (sa)); \
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} while (0)
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#define AUDIT_ARG_SUID(suid) do { \
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if (AUDITING_TD(curthread)) \
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audit_arg_suid((suid)); \
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} while (0)
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#define AUDIT_ARG_SVIPC_CMD(cmd) do { \
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if (AUDITING_TD(curthread)) \
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audit_arg_svipc_cmd((cmd)); \
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} while (0)
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#define AUDIT_ARG_SVIPC_PERM(perm) do { \
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if (AUDITING_TD(curthread)) \
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audit_arg_svipc_perm((perm)); \
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} while (0)
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#define AUDIT_ARG_SVIPC_ID(id) do { \
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if (AUDITING_TD(curthread)) \
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audit_arg_svipc_id((id)); \
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} while (0)
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#define AUDIT_ARG_SVIPC_ADDR(addr) do { \
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if (AUDITING_TD(curthread)) \
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audit_arg_svipc_addr((addr)); \
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} while (0)
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#define AUDIT_ARG_SVIPC_WHICH(which) do { \
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if (AUDITING_TD(curthread)) \
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audit_arg_svipc_which((which)); \
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} while (0)
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#define AUDIT_ARG_TEXT(text) do { \
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if (AUDITING_TD(curthread)) \
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audit_arg_text((text)); \
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} while (0)
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#define AUDIT_ARG_UID(uid) do { \
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if (AUDITING_TD(curthread)) \
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audit_arg_uid((uid)); \
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} while (0)
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#define AUDIT_ARG_UPATH1(td, dirfd, upath) do { \
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if (AUDITING_TD(curthread)) \
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audit_arg_upath1((td), (dirfd), (upath)); \
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} while (0)
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#define AUDIT_ARG_UPATH1_CANON(upath) do { \
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if (AUDITING_TD(curthread)) \
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audit_arg_upath1_canon((upath)); \
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} while (0)
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#define AUDIT_ARG_UPATH2(td, dirfd, upath) do { \
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if (AUDITING_TD(curthread)) \
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audit_arg_upath2((td), (dirfd), (upath)); \
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} while (0)
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#define AUDIT_ARG_UPATH2_CANON(upath) do { \
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if (AUDITING_TD(curthread)) \
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audit_arg_upath2_canon((upath)); \
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} while (0)
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#define AUDIT_ARG_UPATH1_VP(td, rdir, cdir, upath) do { \
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if (AUDITING_TD(curthread)) \
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audit_arg_upath1_vp((td), (rdir), (cdir), (upath)); \
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} while (0)
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#define AUDIT_ARG_UPATH2_VP(td, rdir, cdir, upath) do { \
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if (AUDITING_TD(curthread)) \
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audit_arg_upath2_vp((td), (rdir), (cdir), (upath)); \
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} while (0)
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#define AUDIT_ARG_VALUE(value) do { \
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if (AUDITING_TD(curthread)) \
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audit_arg_value((value)); \
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} while (0)
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#define AUDIT_ARG_VNODE1(vp) do { \
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if (AUDITING_TD(curthread)) \
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audit_arg_vnode1((vp)); \
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} while (0)
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#define AUDIT_ARG_VNODE2(vp) do { \
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if (AUDITING_TD(curthread)) \
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audit_arg_vnode2((vp)); \
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} while (0)
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#define AUDIT_SYSCALL_ENTER(code, td) ({ \
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bool _audit_entered = false; \
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if (__predict_false(audit_syscalls_enabled)) { \
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audit_syscall_enter(code, td); \
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_audit_entered = true; \
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} \
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_audit_entered; \
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})
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/*
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* Wrap the audit_syscall_exit() function so that it is called only when
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* we have a audit record on the thread. Audit records can persist after
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* auditing is disabled, so we don't just check audit_syscalls_enabled here.
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*/
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#define AUDIT_SYSCALL_EXIT(error, td) do { \
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if (AUDITING_TD(td)) \
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audit_syscall_exit(error, td); \
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} while (0)
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/*
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* A Macro to wrap the audit_sysclose() function.
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*/
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#define AUDIT_SYSCLOSE(td, fd) do { \
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if (AUDITING_TD(td)) \
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audit_sysclose(td, fd); \
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} while (0)
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#else /* !AUDIT */
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#define AUDIT_ARG_ADDR(addr)
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#define AUDIT_ARG_ARGV(argv, argc, length)
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#define AUDIT_ARG_ATFD1(atfd)
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#define AUDIT_ARG_ATFD2(atfd)
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#define AUDIT_ARG_AUDITON(udata)
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#define AUDIT_ARG_CMD(cmd)
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#define AUDIT_ARG_DEV(dev)
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#define AUDIT_ARG_EGID(egid)
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#define AUDIT_ARG_ENVV(envv, envc, length)
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#define AUDIT_ARG_EXIT(status, retval)
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#define AUDIT_ARG_EUID(euid)
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#define AUDIT_ARG_FD(fd)
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#define AUDIT_ARG_FILE(p, fp)
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#define AUDIT_ARG_FFLAGS(fflags)
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#define AUDIT_ARG_GID(gid)
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#define AUDIT_ARG_GROUPSET(gidset, gidset_size)
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#define AUDIT_ARG_LOGIN(login)
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#define AUDIT_ARG_MODE(mode)
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#define AUDIT_ARG_OWNER(uid, gid)
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#define AUDIT_ARG_PID(pid)
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#define AUDIT_ARG_POSIX_IPC_PERM(uid, gid, mode)
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#define AUDIT_ARG_PROCESS(p)
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#define AUDIT_ARG_RGID(rgid)
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#define AUDIT_ARG_RIGHTS(rights)
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#define AUDIT_ARG_FCNTL_RIGHTS(fcntlrights)
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#define AUDIT_ARG_RUID(ruid)
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#define AUDIT_ARG_SIGNUM(signum)
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#define AUDIT_ARG_SGID(sgid)
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#define AUDIT_ARG_SOCKET(sodomain, sotype, soprotocol)
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#define AUDIT_ARG_SOCKADDR(td, dirfd, sa)
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#define AUDIT_ARG_SUID(suid)
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#define AUDIT_ARG_SVIPC_CMD(cmd)
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#define AUDIT_ARG_SVIPC_PERM(perm)
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#define AUDIT_ARG_SVIPC_ID(id)
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#define AUDIT_ARG_SVIPC_ADDR(addr)
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#define AUDIT_ARG_SVIPC_WHICH(which)
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#define AUDIT_ARG_TEXT(text)
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#define AUDIT_ARG_UID(uid)
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#define AUDIT_ARG_UPATH1(td, dirfd, upath)
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#define AUDIT_ARG_UPATH1_CANON(upath)
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#define AUDIT_ARG_UPATH2(td, dirfd, upath)
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#define AUDIT_ARG_UPATH2_CANON(upath)
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#define AUDIT_ARG_UPATH1_VP(td, rdir, cdir, upath)
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#define AUDIT_ARG_UPATH2_VP(td, rdir, cdir, upath)
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#define AUDIT_ARG_VALUE(value)
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#define AUDIT_ARG_VNODE1(vp)
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#define AUDIT_ARG_VNODE2(vp)
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#define AUDITING_TD(td) 0
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#define AUDIT_SYSCALL_ENTER(code, td) 0
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#define AUDIT_SYSCALL_EXIT(error, td)
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#define AUDIT_SYSCLOSE(p, fd)
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#endif /* AUDIT */
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#endif /* !_SECURITY_AUDIT_KERNEL_H_ */
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