450 lines
18 KiB
C
450 lines
18 KiB
C
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/*-
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* Copyright (c) 2004-2019 Apple Inc.
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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. 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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*/
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/*
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* NOTICE: This file was modified by SPARTA, Inc. in 2005 to introduce
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* support for mandatory and extensible security protections. This notice
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* is included in support of clause 2.2 (b) of the Apple Public License,
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* Version 2.0.
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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_AUDIT_H
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#define _SECURITY_AUDIT_AUDIT_H
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#if defined(_KERNEL) || defined(KERNEL)
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#include <bsm/audit.h>
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#include <sys/sysctl.h>
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#include <sys/user.h>
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#include <sys/ipc.h>
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/*
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* Audit subsystem condition flags. The audit_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. The audit syscalls flag is set at the first hint that kernel
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* events (system and mach calls) need to be audited. It is used for
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* performance so an event class map table lookup doesn't have be done for
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* every system call if only user events are being audited.
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*/
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extern int audit_enabled;
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extern int audit_suspended;
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extern int audit_syscalls;
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/*
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* Define the masks for the audited arguments.
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*
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* XXXRW: These need to remain in audit.h for now because our vnode and name
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* lookup audit calls rely on passing in flags to indicate which name or
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* vnode is being logged. These should move to audit_private.h when that is
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* fixed.
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*/
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#define ARG_EUID 0x0000000000000001ULL
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#define ARG_RUID 0x0000000000000002ULL
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#define ARG_SUID 0x0000000000000004ULL
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#define ARG_EGID 0x0000000000000008ULL
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#define ARG_RGID 0x0000000000000010ULL
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#define ARG_SGID 0x0000000000000020ULL
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#define ARG_PID 0x0000000000000040ULL
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#define ARG_UID 0x0000000000000080ULL
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#define ARG_AUID 0x0000000000000100ULL
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#define ARG_GID 0x0000000000000200ULL
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#define ARG_FD 0x0000000000000400ULL
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#define ARG_FD1 ARG_FD
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#define ARG_POSIX_IPC_PERM 0x0000000000000800ULL
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#define ARG_FFLAGS 0x0000000000001000ULL
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#define ARG_MODE 0x0000000000002000ULL
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#define ARG_VALUE32 0x0000000000004000ULL
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#define ARG_ADDR32 0x0000000000008000ULL
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#define ARG_ADDR ARG_ADDR32
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#define ARG_LEN 0x0000000000010000ULL
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#define ARG_MASK 0x0000000000020000ULL
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#define ARG_SIGNUM 0x0000000000040000ULL
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#define ARG_LOGIN 0x0000000000080000ULL
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#define ARG_SADDRINET 0x0000000000100000ULL
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#define ARG_SADDRINET6 0x0000000000200000ULL
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#define ARG_SADDRUNIX 0x0000000000400000ULL
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#define ARG_TERMID_ADDR ARG_SADDRUNIX
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#define ARG_KPATH1 0x0000000000800000ULL /* darwin-only */
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#define ARG_KPATH2 0x0000000001000000ULL /* darwin-only */
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#define ARG_UPATH1 0x0000000002000000ULL
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#define ARG_UPATH2 0x0000000004000000ULL
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#define ARG_TEXT 0x0000000008000000ULL
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#define ARG_VNODE1 0x0000000010000000ULL
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#define ARG_VNODE2 0x0000000020000000ULL
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#define ARG_SVIPC_CMD 0x0000000040000000ULL
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#define ARG_SVIPC_PERM 0x0000000080000000ULL
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#define ARG_SVIPC_ID 0x0000000100000000ULL
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#define ARG_SVIPC_ADDR 0x0000000200000000ULL
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#define ARG_GROUPSET 0x0000000400000000ULL
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#define ARG_CMD 0x0000000800000000ULL
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#define ARG_SOCKINFO 0x0000001000000000ULL
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#define ARG_ASID 0x0000002000000000ULL
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#define ARG_TERMID 0x0000004000000000ULL
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#define ARG_AUDITON 0x0000008000000000ULL
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#define ARG_VALUE64 0x0000010000000000ULL /* darwin-only */
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#define ARG_AMASK 0x0000020000000000ULL
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#define ARG_CTLNAME 0x0000040000000000ULL
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#define ARG_PROCESS 0x0000080000000000ULL
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#define ARG_MACHPORT1 0x0000100000000000ULL
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#define ARG_MACHPORT2 0x0000200000000000ULL
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#define ARG_MAC_STRING 0x0000400000000000ULL
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#define ARG_EXIT 0x0000800000000000ULL
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#define ARG_IOVECSTR 0x0001000000000000ULL
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#define ARG_ARGV 0x0002000000000000ULL
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#define ARG_ENVV 0x0004000000000000ULL
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#define ARG_OPAQUE 0x0008000000000000ULL /* darwin-only */
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#define ARG_DATA 0x0010000000000000ULL /* darwin-only */
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#define ARG_ADDR64 0x0020000000000000ULL /* darwin-only */
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#define ARG_FD2 0x0040000000000000ULL /* darwin-only */
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#define ARG_IDENTITY 0x0080000000000000ULL /* darwin-only */
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#define ARG_NONE 0x0000000000000000ULL
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#define ARG_ALL 0xFFFFFFFFFFFFFFFFULL
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#if CONFIG_MACF
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#define MAC_AUDIT_LABEL_LEN 1024
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#define MAC_AUDIT_DATA_TYPE 0
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#define MAC_AUDIT_TEXT_TYPE 1
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struct mac_audit_record {
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int type; /* one of the types defined above */
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int length; /* byte length of the data field */
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u_char *data; /* the payload */
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LIST_ENTRY(mac_audit_record) records;
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};
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#endif
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struct proc;
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struct vnode;
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struct componentname;
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int kau_will_audit(void);
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void audit_init(void);
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void audit_shutdown(void);
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void audit_syscall_enter(unsigned int code,
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struct proc *proc, struct uthread *uthread);
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#if CONFIG_MACF
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/*
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* The parameter list of audit_syscall_exit() was modified to also take the
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* Darwin syscall number, which is required by mac_audit_check_postselect().
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*/
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void audit_syscall_exit(unsigned int code, int error,
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struct proc *proc, struct uthread *uthread);
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#else
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void audit_syscall_exit(int error, struct proc *proc,
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struct uthread *uthread);
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#endif
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void audit_mach_syscall_enter(unsigned short audit_event);
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void audit_mach_syscall_exit(int retval, struct uthread *uthread);
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void audit_subcall_enter(au_event_t event,
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struct proc *proc, struct uthread *uthread);
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void audit_subcall_exit(int error,
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struct uthread *uthread);
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extern struct auditinfo_addr * const audit_default_aia_p;
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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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#if CONFIG_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(struct kaudit_record *ar, user_addr_t addr);
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void audit_arg_exit(struct kaudit_record *ar, int status, int retval);
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void audit_arg_len(struct kaudit_record *ar, user_size_t len);
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void audit_arg_fd(struct kaudit_record *ar, int fd);
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void audit_arg_fd2(struct kaudit_record *ar, int fd);
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void audit_arg_fflags(struct kaudit_record *ar, int fflags);
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void audit_arg_gid(struct kaudit_record *ar, gid_t gid);
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void audit_arg_uid(struct kaudit_record *ar, uid_t uid);
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void audit_arg_egid(struct kaudit_record *ar, gid_t egid);
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void audit_arg_euid(struct kaudit_record *ar, uid_t euid);
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void audit_arg_rgid(struct kaudit_record *ar, gid_t rgid);
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void audit_arg_ruid(struct kaudit_record *ar, uid_t ruid);
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void audit_arg_sgid(struct kaudit_record *ar, gid_t sgid);
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void audit_arg_suid(struct kaudit_record *ar, uid_t suid);
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void audit_arg_groupset(struct kaudit_record *ar, const gid_t *gidset,
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u_int gidset_size);
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void audit_arg_login(struct kaudit_record *ar, const char *login);
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void audit_arg_ctlname(struct kaudit_record *ar, const int *name,
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int namelen);
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void audit_arg_mask(struct kaudit_record *ar, int mask);
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void audit_arg_mode(struct kaudit_record *ar, mode_t mode);
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void audit_arg_value32(struct kaudit_record *ar, uint32_t value32);
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void audit_arg_value64(struct kaudit_record *ar, uint64_t value64);
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void audit_arg_owner(struct kaudit_record *ar, uid_t uid, gid_t gid);
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void audit_arg_pid(struct kaudit_record *ar, pid_t pid);
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void audit_arg_process(struct kaudit_record *ar, proc_t p);
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void audit_arg_signum(struct kaudit_record *ar, u_int signum);
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void audit_arg_socket(struct kaudit_record *ar, int sodomain, int sotype,
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int soprotocol);
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void audit_arg_sockaddr(struct kaudit_record *ar, struct vnode *cwd_vp,
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struct sockaddr *so);
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void audit_arg_auid(struct kaudit_record *ar, uid_t auid);
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void audit_arg_auditinfo(struct kaudit_record *ar,
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const struct auditinfo *au_info);
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void audit_arg_auditinfo_addr(struct kaudit_record *ar,
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const struct auditinfo_addr *au_info);
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void audit_arg_upath(struct kaudit_record *ar, struct vnode *cwd_vp,
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const char *upath, u_int64_t flags);
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void audit_arg_kpath(struct kaudit_record *ar,
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const char *kpath, u_int64_t flags);
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void audit_arg_vnpath(struct kaudit_record *ar, struct vnode *vp,
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u_int64_t flags);
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void audit_arg_vnpath_withref(struct kaudit_record *ar, struct vnode *vp,
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u_int64_t flags);
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void audit_arg_text(struct kaudit_record *ar, const char *text);
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void audit_arg_opaque(struct kaudit_record *ar, const void *data,
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size_t size);
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void audit_arg_data(struct kaudit_record *ar, const void *data, size_t size,
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size_t number);
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void audit_arg_cmd(struct kaudit_record *ar, int cmd);
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void audit_arg_svipc_cmd(struct kaudit_record *ar, int cmd);
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void audit_arg_svipc_perm(struct kaudit_record *ar,
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const struct ipc_perm *perm);
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void audit_arg_svipc_id(struct kaudit_record *ar, int id);
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void audit_arg_svipc_addr(struct kaudit_record *ar, user_addr_t addr);
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void audit_arg_posix_ipc_perm(struct kaudit_record *ar, uid_t uid,
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gid_t gid, mode_t mode);
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void audit_arg_auditon(struct kaudit_record *ar,
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const union auditon_udata *udata);
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void audit_arg_file(struct kaudit_record *ar, struct proc *p,
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struct fileproc *fp);
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void audit_arg_argv(struct kaudit_record *ar, const char *argv, int argc,
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size_t length);
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void audit_arg_envv(struct kaudit_record *ar, const char *envv, int envc,
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size_t length);
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void audit_arg_identity(struct kaudit_record *ar);
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void audit_arg_mach_port1(struct kaudit_record *ar, mach_port_name_t port);
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void audit_arg_mach_port2(struct kaudit_record *ar, mach_port_name_t port);
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void audit_sysclose(struct kaudit_record *ar, struct proc *p, int fd);
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void audit_proc_coredump(proc_t proc, const char *path, int errcode);
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#ifndef _KAUTH_CRED_T
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#define _KAUTH_CRED_T
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struct ucred;
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typedef struct ucred *kauth_cred_t;
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#endif /* !_KAUTH_CRED_T */
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void audit_session_ref(kauth_cred_t cred);
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void audit_session_unref(kauth_cred_t cred);
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void audit_session_procnew(proc_t p);
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void audit_session_procexit(proc_t p);
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int audit_session_spawnjoin(proc_t p, ipc_port_t port);
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void audit_sdev_submit(au_id_t auid, au_asid_t asid, void *record,
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u_int record_len);
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/*
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* Audit session macros.
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*/
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#define IS_VALID_SESSION(a) ((a) != NULL && (a) != audit_default_aia_p)
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#define AUDIT_SESSION_REF(cred) audit_session_ref(cred)
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#define AUDIT_SESSION_UNREF(cred) audit_session_unref(cred)
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#define AUDIT_SESSION_PROCNEW(p) audit_session_procnew(p)
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#define AUDIT_SESSION_PROCEXIT(p) audit_session_procexit(p)
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#if CONFIG_MACF
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/*
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* audit_mac_data() is the MAC Framework's entry point to the audit subsystem.
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* It currently creates only text and data audit tokens.
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*/
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int audit_mac_data(int type, int len, u_char *data);
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void audit_arg_mac_string(struct kaudit_record *ar, char *string);
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#endif
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extern au_event_t sys_au_event[];
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#define AUDIT_RECORD() (current_uthread()->uu_ar)
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#ifndef AUDIT_USE_BUILTIN_EXPECT
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#define AUDIT_USE_BUILTIN_EXPECT
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#endif
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#ifdef AUDIT_USE_BUILTIN_EXPECT
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/*
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* Use branch prediction for the case of auditing enabled but not
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* auditing system calls.
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*/
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#define AUDIT_SYSCALLS() __builtin_expect(audit_syscalls, 0)
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#define AUDIT_ENABLED() __builtin_expect(audit_syscalls && \
|
||
|
|
audit_enabled, 0)
|
||
|
|
#define AUDIT_AUDITING(x) __builtin_expect(NULL != (x), 0)
|
||
|
|
|
||
|
|
#else
|
||
|
|
|
||
|
|
#define AUDIT_SYSCALLS() (audit_syscalls)
|
||
|
|
#define AUDIT_ENABLED() (audit_syscalls && audit_enabled)
|
||
|
|
#define AUDIT_AUDITING(x) (NULL != (x))
|
||
|
|
|
||
|
|
#endif /* AUDIT_USE_BUILTIN_EXPECT */
|
||
|
|
|
||
|
|
#define AUDIT_RECORD_EXISTS() (AUDIT_ENABLED() && AUDIT_AUDITING(AUDIT_RECORD()))
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Define a macro to wrap the audit_arg_* calls by checking the global
|
||
|
|
* audit_enabled flag before performing the actual call.
|
||
|
|
*/
|
||
|
|
#define AUDIT_ARG(op, args...) do { \
|
||
|
|
if (AUDIT_SYSCALLS()) { \
|
||
|
|
struct kaudit_record *__single __ar = AUDIT_RECORD(); \
|
||
|
|
if (AUDIT_AUDITING(__ar)) \
|
||
|
|
audit_arg_ ## op (__ar, ## args); \
|
||
|
|
} \
|
||
|
|
} while (0)
|
||
|
|
|
||
|
|
#define AUDIT_SYSCALL_ENTER(args...) do { \
|
||
|
|
if (AUDIT_ENABLED()) { \
|
||
|
|
audit_syscall_enter(args); \
|
||
|
|
} \
|
||
|
|
} while (0)
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Wrap the audit_syscall_exit() function so that it is called only when
|
||
|
|
* we have a audit record on the thread. Audit records can persist after
|
||
|
|
* auditing is disabled, so we don't just check audit_enabled here.
|
||
|
|
*/
|
||
|
|
#define AUDIT_SYSCALL_EXIT(code, proc, uthread, error) do { \
|
||
|
|
if (AUDIT_AUDITING(uthread->uu_ar)) \
|
||
|
|
audit_syscall_exit(code, error, proc, uthread); \
|
||
|
|
} while (0)
|
||
|
|
|
||
|
|
#define AUDIT_SUBCALL_ENTER(event, proc, uthread) do { \
|
||
|
|
if (AUDIT_ENABLED()) \
|
||
|
|
audit_subcall_enter(AUE_ ## event, proc, uthread); \
|
||
|
|
} while (0)
|
||
|
|
|
||
|
|
#define AUDIT_SUBCALL_EXIT(uthread, error) do { \
|
||
|
|
if (AUDIT_AUDITING(uthread->uu_ar)) \
|
||
|
|
audit_subcall_exit(error, uthread); \
|
||
|
|
} while (0)
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Wrap the audit_mach_syscall_enter() and audit_mach_syscall_exit()
|
||
|
|
* functions in a manner similar to other system call enter/exit functions.
|
||
|
|
*/
|
||
|
|
#define AUDIT_MACH_SYSCALL_ENTER(args...) do { \
|
||
|
|
if (AUDIT_ENABLED()) { \
|
||
|
|
audit_mach_syscall_enter(args); \
|
||
|
|
} \
|
||
|
|
} while (0)
|
||
|
|
|
||
|
|
#define AUDIT_MACH_SYSCALL_EXIT(retval) do { \
|
||
|
|
if (AUDIT_SYSCALLS()) { \
|
||
|
|
struct uthread *__uthread = current_uthread(); \
|
||
|
|
if (AUDIT_AUDITING(__uthread->uu_ar)) \
|
||
|
|
audit_mach_syscall_exit(retval, __uthread); \
|
||
|
|
} \
|
||
|
|
} while (0)
|
||
|
|
|
||
|
|
/*
|
||
|
|
* A Macro to wrap the audit_sysclose() function.
|
||
|
|
*/
|
||
|
|
#define AUDIT_SYSCLOSE(args...) do { \
|
||
|
|
if (AUDIT_SYSCALLS()) { \
|
||
|
|
struct kaudit_record *__ar = AUDIT_RECORD(); \
|
||
|
|
if (AUDIT_AUDITING(__ar)) \
|
||
|
|
audit_sysclose(__ar, args); \
|
||
|
|
} \
|
||
|
|
} while (0)
|
||
|
|
|
||
|
|
#else /* !CONFIG_AUDIT */
|
||
|
|
|
||
|
|
#define AUDIT_ARG(op, args...) do { \
|
||
|
|
} while (0)
|
||
|
|
|
||
|
|
#define AUDIT_SYSCALL_ENTER(args...) do { \
|
||
|
|
} while (0)
|
||
|
|
|
||
|
|
#define AUDIT_SYSCALL_EXIT(code, proc, uthread, error) do { \
|
||
|
|
} while (0)
|
||
|
|
|
||
|
|
#define AUDIT_SUBCALL_ENTER(event, proc, uthread) do { \
|
||
|
|
} while (0)
|
||
|
|
|
||
|
|
#define AUDIT_SUBCALL_EXIT(uthread, error) do { \
|
||
|
|
} while (0)
|
||
|
|
|
||
|
|
#define AUDIT_MACH_SYSCALL_ENTER(args...) do { \
|
||
|
|
} while (0)
|
||
|
|
|
||
|
|
#define AUDIT_MACH_SYSCALL_EXIT(retval) do { \
|
||
|
|
} while (0)
|
||
|
|
|
||
|
|
#define AUDIT_SYSCLOSE(op, args...) do { \
|
||
|
|
} while (0)
|
||
|
|
|
||
|
|
#define AUDIT_SESSION_REF(cred) do { \
|
||
|
|
} while (0)
|
||
|
|
|
||
|
|
#define AUDIT_SESSION_UNREF(cred) do { \
|
||
|
|
} while (0)
|
||
|
|
|
||
|
|
#define AUDIT_SESSION_PROCNEW(cred) do { \
|
||
|
|
} while (0)
|
||
|
|
|
||
|
|
#define AUDIT_SESSION_PROCEXIT(cred) do { \
|
||
|
|
} while (0)
|
||
|
|
|
||
|
|
#define AUDIT_SESSION_REF(cred) do { \
|
||
|
|
} while (0)
|
||
|
|
|
||
|
|
#define AUDIT_SESSION_UNREF(cred) do { \
|
||
|
|
} while (0)
|
||
|
|
|
||
|
|
#define AUDIT_SESSION_PROCNEW(cred) do { \
|
||
|
|
} while (0)
|
||
|
|
|
||
|
|
#define AUDIT_SESSION_PROCEXIT(cred) do { \
|
||
|
|
} while (0)
|
||
|
|
|
||
|
|
#endif /* CONFIG_AUDIT */
|
||
|
|
|
||
|
|
#endif /* KERNEL */
|
||
|
|
|
||
|
|
#endif /* !_SECURITY_AUDIT_ADUIT_H */
|