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freebsd-dev/contrib/openbsm/libbsm/bsm_token.c
Robert Watson bb97b41819 Vendor import of OpenBSM 1.0 alpha 11, with the following change history 
notes since the last import:

OpenBSM 1.0 alpha 11

- Reclassify certain read/write operations as having no class rather than the
  fr/fw class; our default classes audit intent (open) not operations (read,
  write).
- Introduce AUE_SYSCTL_WRITE event so that BSD/Darwin systems can audit reads
  and writes of sysctls as separate events.  Add additional kernel
  environment and jail events for FreeBSD.
- Break AUDIT_TRIGGER_OPEN_NEW into two events, AUDIT_TRIGGER_ROTATE_USER
  (issued by the user audit(8) tool) and AUDIT_TRIGGER_ROTATE_KERNEL (issued
  by the kernel audit implementation) so that they can be distinguished.
- Disable rate limiting of rotate requests; as the kernel doesn't retransmit
  a dropped request, the log file will otherwise grow indefinitely if the
  trigger is dropped.
- Improve auditd debugging output.
- Fix a number of threading related bugs in audit_control file reading
  routines.
- Add APIs au_poltostr() and au_strtopol() to convert between text
  representations of audit_control policy flags and the flags passed to
  auditon(A_SETPOLICY) and retrieved from auditon(A_GETPOLICY).
- Add API getacpol() to return the 'policy:' entry from audit_control, an
  extension to the Solaris file format to allow specification of policy
  persistent flags.
- Update audump to print the audit_control policy field.
- Update auditd to read the audit_control policy field and set the kernel
  policy to match it when configuring/reconfiguring.  Remove the -s and -h
  arguments as these policies are now set via the configuration file.  If a
  policy line is not found in the configuration file, continue with the
  current default of setting AUDIT_CNT.
- Fix bugs in the parsing of large execve(2) arguments and environmental
  variable tokens; increase maximum parsed argument and variable count.
- configure now detects strlcat(), used by policy-related functions.
- Reference token and record sample files added to test tree.

Obtained from:	TrustedBSD Project
2006-09-21 07:07:33 +00:00

1220 lines
26 KiB
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/*
* Copyright (c) 2004 Apple Computer, Inc.
* Copyright (c) 2005 SPARTA, Inc.
* All rights reserved.
*
* This code was developed in part by Robert N. M. Watson, Senior Principal
* Scientist, SPARTA, Inc.
*
* 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. Neither the name of Apple Computer, Inc. ("Apple") nor the names of
* its contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "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 APPLE OR ITS CONTRIBUTORS 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.
*
* $P4: //depot/projects/trustedbsd/openbsm/libbsm/bsm_token.c#52 $
*/
#include <sys/types.h>
#include <config/config.h>
#ifdef HAVE_SYS_ENDIAN_H
#include <sys/endian.h>
#else /* !HAVE_SYS_ENDIAN_H */
#ifdef HAVE_MACHINE_ENDIAN_H
#include <machine/endian.h>
#else /* !HAVE_MACHINE_ENDIAN_H */
#ifdef HAVE_ENDIAN_H
#include <endian.h>
#else /* !HAVE_ENDIAN_H */
#error "No supported endian.h"
#endif /* !HAVE_ENDIAN_H */
#endif /* !HAVE_MACHINE_ENDIAN_H */
#include <compat/endian.h>
#endif /* !HAVE_SYS_ENDIAN_H */
#ifdef HAVE_FULL_QUEUE_H
#include <sys/queue.h>
#else /* !HAVE_FULL_QUEUE_H */
#include <compat/queue.h>
#endif /* !HAVE_FULL_QUEUE_H */
#include <sys/socket.h>
#include <sys/time.h>
#include <sys/un.h>
#include <sys/ipc.h>
#include <netinet/in.h>
#include <netinet/in_systm.h>
#include <netinet/ip.h>
#include <assert.h>
#include <errno.h>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
#include <bsm/audit_internal.h>
#include <bsm/libbsm.h>
#define GET_TOKEN_AREA(t, dptr, length) do { \
(t) = malloc(sizeof(token_t)); \
if ((t) != NULL) { \
(t)->len = (length); \
(dptr) = (t->t_data) = malloc((length) * sizeof(u_char)); \
if ((dptr) == NULL) { \
free(t); \
(t) = NULL; \
} else \
memset((dptr), 0, (length)); \
} else \
(dptr) = NULL; \
assert(t == NULL || dptr != NULL); \
} while (0)
/*
* token ID 1 byte
* argument # 1 byte
* argument value 4 bytes/8 bytes (32-bit/64-bit value)
* text length 2 bytes
* text N bytes + 1 terminating NULL byte
*/
token_t *
au_to_arg32(char n, char *text, u_int32_t v)
{
token_t *t;
u_char *dptr = NULL;
u_int16_t textlen;
textlen = strlen(text);
textlen += 1;
GET_TOKEN_AREA(t, dptr, 2 * sizeof(u_char) + sizeof(u_int32_t) +
sizeof(u_int16_t) + textlen);
if (t == NULL)
return (NULL);
ADD_U_CHAR(dptr, AUT_ARG32);
ADD_U_CHAR(dptr, n);
ADD_U_INT32(dptr, v);
ADD_U_INT16(dptr, textlen);
ADD_STRING(dptr, text, textlen);
return (t);
}
token_t *
au_to_arg64(char n, char *text, u_int64_t v)
{
token_t *t;
u_char *dptr = NULL;
u_int16_t textlen;
textlen = strlen(text);
textlen += 1;
GET_TOKEN_AREA(t, dptr, 2 * sizeof(u_char) + sizeof(u_int64_t) +
sizeof(u_int16_t) + textlen);
if (t == NULL)
return (NULL);
ADD_U_CHAR(dptr, AUT_ARG64);
ADD_U_CHAR(dptr, n);
ADD_U_INT64(dptr, v);
ADD_U_INT16(dptr, textlen);
ADD_STRING(dptr, text, textlen);
return (t);
}
token_t *
au_to_arg(char n, char *text, u_int32_t v)
{
return (au_to_arg32(n, text, v));
}
#if defined(_KERNEL) || defined(KERNEL)
/*
* token ID 1 byte
* file access mode 4 bytes
* owner user ID 4 bytes
* owner group ID 4 bytes
* file system ID 4 bytes
* node ID 8 bytes
* device 4 bytes/8 bytes (32-bit/64-bit)
*/
token_t *
au_to_attr32(struct vnode_au_info *vni)
{
token_t *t;
u_char *dptr = NULL;
u_int16_t pad0_16 = 0;
u_int16_t pad0_32 = 0;
GET_TOKEN_AREA(t, dptr, sizeof(u_char) + 2 * sizeof(u_int16_t) +
3 * sizeof(u_int32_t) + sizeof(u_int64_t) + sizeof(u_int32_t));
if (t == NULL)
return (NULL);
ADD_U_CHAR(dptr, AUT_ATTR32);
/*
* Darwin defines the size for the file mode
* as 2 bytes; BSM defines 4 so pad with 0
*/
ADD_U_INT16(dptr, pad0_16);
ADD_U_INT16(dptr, vni->vn_mode);
ADD_U_INT32(dptr, vni->vn_uid);
ADD_U_INT32(dptr, vni->vn_gid);
ADD_U_INT32(dptr, vni->vn_fsid);
/*
* Some systems use 32-bit file ID's, other's use 64-bit file IDs.
* Attempt to handle both, and let the compiler sort it out. If we
* could pick this out at compile-time, it would be better, so as to
* avoid the else case below.
*/
if (sizeof(vni->vn_fileid) == sizeof(uint32_t)) {
ADD_U_INT32(dptr, pad0_32);
ADD_U_INT32(dptr, vni->vn_fileid);
} else if (sizeof(vni->vn_fileid) == sizeof(uint64_t))
ADD_U_INT64(dptr, vni->vn_fileid);
else
ADD_U_INT64(dptr, 0LL);
ADD_U_INT32(dptr, vni->vn_dev);
return (t);
}
token_t *
au_to_attr64(struct vnode_au_info *vni)
{
errno = ENOTSUP;
return (NULL);
}
token_t *
au_to_attr(struct vnode_au_info *vni)
{
return (au_to_attr32(vni));
}
#endif /* !(defined(_KERNEL) || defined(KERNEL) */
/*
* token ID 1 byte
* how to print 1 byte
* basic unit 1 byte
* unit count 1 byte
* data items (depends on basic unit)
*/
token_t *
au_to_data(char unit_print, char unit_type, char unit_count, char *p)
{
token_t *t;
u_char *dptr = NULL;
size_t datasize, totdata;
/* Determine the size of the basic unit. */
switch (unit_type) {
case AUR_BYTE:
/* case AUR_CHAR: */
datasize = AUR_BYTE_SIZE;
break;
case AUR_SHORT:
datasize = AUR_SHORT_SIZE;
break;
case AUR_INT32:
/* case AUR_INT: */
datasize = AUR_INT32_SIZE;
break;
case AUR_INT64:
datasize = AUR_INT64_SIZE;
break;
default:
errno = EINVAL;
return (NULL);
}
totdata = datasize * unit_count;
GET_TOKEN_AREA(t, dptr, 4 * sizeof(u_char) + totdata);
if (t == NULL)
return (NULL);
ADD_U_CHAR(dptr, AUT_DATA);
ADD_U_CHAR(dptr, unit_print);
ADD_U_CHAR(dptr, unit_type);
ADD_U_CHAR(dptr, unit_count);
ADD_MEM(dptr, p, totdata);
return (t);
}
/*
* token ID 1 byte
* status 4 bytes
* return value 4 bytes
*/
token_t *
au_to_exit(int retval, int err)
{
token_t *t;
u_char *dptr = NULL;
GET_TOKEN_AREA(t, dptr, sizeof(u_char) + 2 * sizeof(u_int32_t));
if (t == NULL)
return (NULL);
ADD_U_CHAR(dptr, AUT_EXIT);
ADD_U_INT32(dptr, err);
ADD_U_INT32(dptr, retval);
return (t);
}
/*
*/
token_t *
au_to_groups(int *groups)
{
return (au_to_newgroups(AUDIT_MAX_GROUPS, groups));
}
/*
* token ID 1 byte
* number groups 2 bytes
* group list count * 4 bytes
*/
token_t *
au_to_newgroups(u_int16_t n, gid_t *groups)
{
token_t *t;
u_char *dptr = NULL;
int i;
GET_TOKEN_AREA(t, dptr, sizeof(u_char) + sizeof(u_int16_t) +
n * sizeof(u_int32_t));
if (t == NULL)
return (NULL);
ADD_U_CHAR(dptr, AUT_NEWGROUPS);
ADD_U_INT16(dptr, n);
for (i = 0; i < n; i++)
ADD_U_INT32(dptr, groups[i]);
return (t);
}
/*
* token ID 1 byte
* internet address 4 bytes
*/
token_t *
au_to_in_addr(struct in_addr *internet_addr)
{
token_t *t;
u_char *dptr = NULL;
GET_TOKEN_AREA(t, dptr, sizeof(u_char) + sizeof(uint32_t));
if (t == NULL)
return (NULL);
ADD_U_CHAR(dptr, AUT_IN_ADDR);
ADD_MEM(dptr, &internet_addr->s_addr, sizeof(uint32_t));
return (t);
}
/*
* token ID 1 byte
* address type/length 4 bytes
* Address 16 bytes
*/
token_t *
au_to_in_addr_ex(struct in6_addr *internet_addr)
{
token_t *t;
u_char *dptr = NULL;
u_int32_t type = AF_INET6;
GET_TOKEN_AREA(t, dptr, sizeof(u_char) + 5 * sizeof(uint32_t));
if (t == NULL)
return (NULL);
ADD_U_CHAR(dptr, AUT_IN_ADDR_EX);
ADD_U_INT32(dptr, type);
ADD_MEM(dptr, internet_addr, 5 * sizeof(uint32_t));
return (t);
}
/*
* token ID 1 byte
* ip header 20 bytes
*/
token_t *
au_to_ip(struct ip *ip)
{
token_t *t;
u_char *dptr = NULL;
GET_TOKEN_AREA(t, dptr, sizeof(u_char) + sizeof(struct ip));
if (t == NULL)
return (NULL);
ADD_U_CHAR(dptr, AUT_IP);
/*
* XXXRW: Any byte order work needed on the IP header before writing?
*/
ADD_MEM(dptr, ip, sizeof(struct ip));
return (t);
}
/*
* token ID 1 byte
* object ID type 1 byte
* object ID 4 bytes
*/
token_t *
au_to_ipc(char type, int id)
{
token_t *t;
u_char *dptr = NULL;
GET_TOKEN_AREA(t, dptr, 2 * sizeof(u_char) + sizeof(u_int32_t));
if (t == NULL)
return (NULL);
ADD_U_CHAR(dptr, AUT_IPC);
ADD_U_CHAR(dptr, type);
ADD_U_INT32(dptr, id);
return (t);
}
/*
* token ID 1 byte
* owner user ID 4 bytes
* owner group ID 4 bytes
* creator user ID 4 bytes
* creator group ID 4 bytes
* access mode 4 bytes
* slot sequence # 4 bytes
* key 4 bytes
*/
token_t *
au_to_ipc_perm(struct ipc_perm *perm)
{
token_t *t;
u_char *dptr = NULL;
u_int16_t pad0 = 0;
GET_TOKEN_AREA(t, dptr, 12 * sizeof(u_int16_t) + sizeof(u_int32_t));
if (t == NULL)
return (NULL);
ADD_U_CHAR(dptr, AUT_IPC_PERM);
/*
* Darwin defines the sizes for ipc_perm members
* as 2 bytes; BSM defines 4 so pad with 0
*/
ADD_U_INT16(dptr, pad0);
ADD_U_INT16(dptr, perm->uid);
ADD_U_INT16(dptr, pad0);
ADD_U_INT16(dptr, perm->gid);
ADD_U_INT16(dptr, pad0);
ADD_U_INT16(dptr, perm->cuid);
ADD_U_INT16(dptr, pad0);
ADD_U_INT16(dptr, perm->cgid);
ADD_U_INT16(dptr, pad0);
ADD_U_INT16(dptr, perm->mode);
ADD_U_INT16(dptr, pad0);
#ifdef HAVE_IPC_PERM___SEQ
ADD_U_INT16(dptr, perm->__seq);
#else
ADD_U_INT16(dptr, perm->seq);
#endif
#ifdef HAVE_IPC_PERM___KEY
ADD_U_INT32(dptr, perm->__key);
#else
ADD_U_INT32(dptr, perm->key);
#endif
return (t);
}
/*
* token ID 1 byte
* port IP address 2 bytes
*/
token_t *
au_to_iport(u_int16_t iport)
{
token_t *t;
u_char *dptr = NULL;
GET_TOKEN_AREA(t, dptr, sizeof(u_char) + sizeof(u_int16_t));
if (t == NULL)
return (NULL);
ADD_U_CHAR(dptr, AUT_IPORT);
ADD_U_INT16(dptr, iport);
return (t);
}
/*
* token ID 1 byte
* size 2 bytes
* data size bytes
*/
token_t *
au_to_opaque(char *data, u_int16_t bytes)
{
token_t *t;
u_char *dptr = NULL;
GET_TOKEN_AREA(t, dptr, sizeof(u_char) + sizeof(u_int16_t) + bytes);
if (t == NULL)
return (NULL);
ADD_U_CHAR(dptr, AUT_OPAQUE);
ADD_U_INT16(dptr, bytes);
ADD_MEM(dptr, data, bytes);
return (t);
}
/*
* token ID 1 byte
* seconds of time 4 bytes
* milliseconds of time 4 bytes
* file name len 2 bytes
* file pathname N bytes + 1 terminating NULL byte
*/
token_t *
au_to_file(char *file, struct timeval tm)
{
token_t *t;
u_char *dptr = NULL;
u_int16_t filelen;
u_int32_t timems;
filelen = strlen(file);
filelen += 1;
GET_TOKEN_AREA(t, dptr, sizeof(u_char) + 2 * sizeof(u_int32_t) +
sizeof(u_int16_t) + filelen);
if (t == NULL)
return (NULL);
timems = tm.tv_usec/1000;
ADD_U_CHAR(dptr, AUT_OTHER_FILE32);
ADD_U_INT32(dptr, tm.tv_sec);
ADD_U_INT32(dptr, timems); /* We need time in ms. */
ADD_U_INT16(dptr, filelen);
ADD_STRING(dptr, file, filelen);
return (t);
}
/*
* token ID 1 byte
* text length 2 bytes
* text N bytes + 1 terminating NULL byte
*/
token_t *
au_to_text(char *text)
{
token_t *t;
u_char *dptr = NULL;
u_int16_t textlen;
textlen = strlen(text);
textlen += 1;
GET_TOKEN_AREA(t, dptr, sizeof(u_char) + sizeof(u_int16_t) + textlen);
if (t == NULL)
return (NULL);
ADD_U_CHAR(dptr, AUT_TEXT);
ADD_U_INT16(dptr, textlen);
ADD_STRING(dptr, text, textlen);
return (t);
}
/*
* token ID 1 byte
* path length 2 bytes
* path N bytes + 1 terminating NULL byte
*/
token_t *
au_to_path(char *text)
{
token_t *t;
u_char *dptr = NULL;
u_int16_t textlen;
textlen = strlen(text);
textlen += 1;
GET_TOKEN_AREA(t, dptr, sizeof(u_char) + sizeof(u_int16_t) + textlen);
if (t == NULL)
return (NULL);
ADD_U_CHAR(dptr, AUT_PATH);
ADD_U_INT16(dptr, textlen);
ADD_STRING(dptr, text, textlen);
return (t);
}
/*
* token ID 1 byte
* audit ID 4 bytes
* effective user ID 4 bytes
* effective group ID 4 bytes
* real user ID 4 bytes
* real group ID 4 bytes
* process ID 4 bytes
* session ID 4 bytes
* terminal ID
* port ID 4 bytes/8 bytes (32-bit/64-bit value)
* machine address 4 bytes
*/
token_t *
au_to_process32(au_id_t auid, uid_t euid, gid_t egid, uid_t ruid, gid_t rgid,
pid_t pid, au_asid_t sid, au_tid_t *tid)
{
token_t *t;
u_char *dptr = NULL;
GET_TOKEN_AREA(t, dptr, sizeof(u_char) + 9 * sizeof(u_int32_t));
if (t == NULL)
return (NULL);
ADD_U_CHAR(dptr, AUT_PROCESS32);
ADD_U_INT32(dptr, auid);
ADD_U_INT32(dptr, euid);
ADD_U_INT32(dptr, egid);
ADD_U_INT32(dptr, ruid);
ADD_U_INT32(dptr, rgid);
ADD_U_INT32(dptr, pid);
ADD_U_INT32(dptr, sid);
ADD_U_INT32(dptr, tid->port);
ADD_MEM(dptr, &tid->machine, sizeof(u_int32_t));
return (t);
}
token_t *
au_to_process64(__unused au_id_t auid, __unused uid_t euid,
__unused gid_t egid, __unused uid_t ruid, __unused gid_t rgid,
__unused pid_t pid, __unused au_asid_t sid, __unused au_tid_t *tid)
{
errno = ENOTSUP;
return (NULL);
}
token_t *
au_to_process(__unused au_id_t auid, __unused uid_t euid,
__unused gid_t egid, __unused uid_t ruid, __unused gid_t rgid,
__unused pid_t pid, __unused au_asid_t sid, __unused au_tid_t *tid)
{
return (au_to_process32(auid, euid, egid, ruid, rgid, pid, sid,
tid));
}
/*
* token ID 1 byte
* audit ID 4 bytes
* effective user ID 4 bytes
* effective group ID 4 bytes
* real user ID 4 bytes
* real group ID 4 bytes
* process ID 4 bytes
* session ID 4 bytes
* terminal ID
* port ID 4 bytes/8 bytes (32-bit/64-bit value)
* address type-len 4 bytes
* machine address 16 bytes
*/
token_t *
au_to_process32_ex(au_id_t auid, uid_t euid, gid_t egid, uid_t ruid,
gid_t rgid, pid_t pid, au_asid_t sid, au_tid_addr_t *tid)
{
token_t *t;
u_char *dptr = NULL;
if (tid->at_type == AU_IPv4)
GET_TOKEN_AREA(t, dptr, sizeof(u_char) +
10 * sizeof(u_int32_t));
else if (tid->at_type == AU_IPv6)
GET_TOKEN_AREA(t, dptr, sizeof(u_char) +
13 * sizeof(u_int32_t));
else {
errno = EINVAL;
return (NULL);
}
if (t == NULL)
return (NULL);
ADD_U_CHAR(dptr, AUT_PROCESS32_EX);
ADD_U_INT32(dptr, auid);
ADD_U_INT32(dptr, euid);
ADD_U_INT32(dptr, egid);
ADD_U_INT32(dptr, ruid);
ADD_U_INT32(dptr, rgid);
ADD_U_INT32(dptr, pid);
ADD_U_INT32(dptr, sid);
ADD_U_INT32(dptr, tid->at_port);
ADD_U_INT32(dptr, tid->at_type);
ADD_U_INT32(dptr, tid->at_addr[0]);
if (tid->at_type == AU_IPv6) {
ADD_U_INT32(dptr, tid->at_addr[1]);
ADD_U_INT32(dptr, tid->at_addr[2]);
ADD_U_INT32(dptr, tid->at_addr[3]);
}
return (t);
}
token_t *
au_to_process64_ex(au_id_t auid, uid_t euid, gid_t egid, uid_t ruid,
gid_t rgid, pid_t pid, au_asid_t sid, au_tid_addr_t *tid)
{
errno = ENOTSUP;
return (NULL);
}
token_t *
au_to_process_ex(au_id_t auid, uid_t euid, gid_t egid, uid_t ruid,
gid_t rgid, pid_t pid, au_asid_t sid, au_tid_addr_t *tid)
{
return (au_to_process32_ex(auid, euid, egid, ruid, rgid, pid, sid,
tid));
}
/*
* token ID 1 byte
* error status 1 byte
* return value 4 bytes/8 bytes (32-bit/64-bit value)
*/
token_t *
au_to_return32(char status, u_int32_t ret)
{
token_t *t;
u_char *dptr = NULL;
GET_TOKEN_AREA(t, dptr, 2 * sizeof(u_char) + sizeof(u_int32_t));
if (t == NULL)
return (NULL);
ADD_U_CHAR(dptr, AUT_RETURN32);
ADD_U_CHAR(dptr, status);
ADD_U_INT32(dptr, ret);
return (t);
}
token_t *
au_to_return64(char status, u_int64_t ret)
{
token_t *t;
u_char *dptr = NULL;
GET_TOKEN_AREA(t, dptr, 2 * sizeof(u_char) + sizeof(u_int64_t));
if (t == NULL)
return (NULL);
ADD_U_CHAR(dptr, AUT_RETURN64);
ADD_U_CHAR(dptr, status);
ADD_U_INT64(dptr, ret);
return (t);
}
token_t *
au_to_return(char status, u_int32_t ret)
{
return (au_to_return32(status, ret));
}
/*
* token ID 1 byte
* sequence number 4 bytes
*/
token_t *
au_to_seq(long audit_count)
{
token_t *t;
u_char *dptr = NULL;
GET_TOKEN_AREA(t, dptr, sizeof(u_char) + sizeof(u_int32_t));
if (t == NULL)
return (NULL);
ADD_U_CHAR(dptr, AUT_SEQ);
ADD_U_INT32(dptr, audit_count);
return (t);
}
/*
* token ID 1 byte
* socket family 2 bytes
* path 104 bytes
*/
token_t *
au_to_sock_unix(struct sockaddr_un *so)
{
token_t *t;
u_char *dptr;
GET_TOKEN_AREA(t, dptr, 3 * sizeof(u_char) + strlen(so->sun_path) + 1);
if (t == NULL)
return (NULL);
ADD_U_CHAR(dptr, AU_SOCK_UNIX_TOKEN);
/* BSM token has two bytes for family */
ADD_U_CHAR(dptr, 0);
ADD_U_CHAR(dptr, so->sun_family);
ADD_STRING(dptr, so->sun_path, strlen(so->sun_path) + 1);
return (t);
}
/*
* token ID 1 byte
* socket family 2 bytes
* local port 2 bytes
* socket address 4 bytes
*/
token_t *
au_to_sock_inet32(struct sockaddr_in *so)
{
token_t *t;
u_char *dptr = NULL;
uint16_t family;
GET_TOKEN_AREA(t, dptr, sizeof(u_char) + 2 * sizeof(uint16_t) +
sizeof(uint32_t));
if (t == NULL)
return (NULL);
ADD_U_CHAR(dptr, AUT_SOCKINET32);
/*
* BSM defines the family field as 16 bits, but many operating
* systems have an 8-bit sin_family field. Extend to 16 bits before
* writing into the token. Assume that both the port and the address
* in the sockaddr_in are already in network byte order, but family
* is in local byte order.
*
* XXXRW: Should a name space conversion be taking place on the value
* of sin_family?
*/
family = so->sin_family;
ADD_U_INT16(dptr, family);
ADD_MEM(dptr, &so->sin_port, sizeof(uint16_t));
ADD_MEM(dptr, &so->sin_addr.s_addr, sizeof(uint32_t));
return (t);
}
token_t *
au_to_sock_inet128(struct sockaddr_in6 *so)
{
token_t *t;
u_char *dptr = NULL;
GET_TOKEN_AREA(t, dptr, 3 * sizeof(u_char) + sizeof(u_int16_t) +
4 * sizeof(u_int32_t));
if (t == NULL)
return (NULL);
ADD_U_CHAR(dptr, AUT_SOCKINET128);
/*
* In Darwin, sin6_family is one octet, but BSM defines the token
* to store two. So we copy in a 0 first.
*/
ADD_U_CHAR(dptr, 0);
ADD_U_CHAR(dptr, so->sin6_family);
ADD_U_INT16(dptr, so->sin6_port);
ADD_MEM(dptr, &so->sin6_addr, 4 * sizeof(uint32_t));
return (t);
}
token_t *
au_to_sock_inet(struct sockaddr_in *so)
{
return (au_to_sock_inet32(so));
}
/*
* token ID 1 byte
* audit ID 4 bytes
* effective user ID 4 bytes
* effective group ID 4 bytes
* real user ID 4 bytes
* real group ID 4 bytes
* process ID 4 bytes
* session ID 4 bytes
* terminal ID
* port ID 4 bytes/8 bytes (32-bit/64-bit value)
* machine address 4 bytes
*/
token_t *
au_to_subject32(au_id_t auid, uid_t euid, gid_t egid, uid_t ruid, gid_t rgid,
pid_t pid, au_asid_t sid, au_tid_t *tid)
{
token_t *t;
u_char *dptr = NULL;
GET_TOKEN_AREA(t, dptr, sizeof(u_char) + 9 * sizeof(u_int32_t));
if (t == NULL)
return (NULL);
ADD_U_CHAR(dptr, AUT_SUBJECT32);
ADD_U_INT32(dptr, auid);
ADD_U_INT32(dptr, euid);
ADD_U_INT32(dptr, egid);
ADD_U_INT32(dptr, ruid);
ADD_U_INT32(dptr, rgid);
ADD_U_INT32(dptr, pid);
ADD_U_INT32(dptr, sid);
ADD_U_INT32(dptr, tid->port);
ADD_MEM(dptr, &tid->machine, sizeof(u_int32_t));
return (t);
}
token_t *
au_to_subject64(au_id_t auid, uid_t euid, gid_t egid, uid_t ruid, gid_t rgid,
pid_t pid, au_asid_t sid, au_tid_t *tid)
{
errno = ENOTSUP;
return (NULL);
}
token_t *
au_to_subject(au_id_t auid, uid_t euid, gid_t egid, uid_t ruid, gid_t rgid,
pid_t pid, au_asid_t sid, au_tid_t *tid)
{
return (au_to_subject32(auid, euid, egid, ruid, rgid, pid, sid,
tid));
}
/*
* token ID 1 byte
* audit ID 4 bytes
* effective user ID 4 bytes
* effective group ID 4 bytes
* real user ID 4 bytes
* real group ID 4 bytes
* process ID 4 bytes
* session ID 4 bytes
* terminal ID
* port ID 4 bytes/8 bytes (32-bit/64-bit value)
* address type/length 4 bytes
* machine address 16 bytes
*/
token_t *
au_to_subject32_ex(au_id_t auid, uid_t euid, gid_t egid, uid_t ruid,
gid_t rgid, pid_t pid, au_asid_t sid, au_tid_addr_t *tid)
{
token_t *t;
u_char *dptr = NULL;
if (tid->at_type == AU_IPv4)
GET_TOKEN_AREA(t, dptr, sizeof(u_char) + 10 *
sizeof(u_int32_t));
else if (tid->at_type == AU_IPv6)
GET_TOKEN_AREA(t, dptr, sizeof(u_char) + 13 *
sizeof(u_int32_t));
else {
errno = EINVAL;
return (NULL);
}
if (t == NULL)
return (NULL);
ADD_U_CHAR(dptr, AUT_SUBJECT32_EX);
ADD_U_INT32(dptr, auid);
ADD_U_INT32(dptr, euid);
ADD_U_INT32(dptr, egid);
ADD_U_INT32(dptr, ruid);
ADD_U_INT32(dptr, rgid);
ADD_U_INT32(dptr, pid);
ADD_U_INT32(dptr, sid);
ADD_U_INT32(dptr, tid->at_port);
ADD_U_INT32(dptr, tid->at_type);
ADD_U_INT32(dptr, tid->at_addr[0]);
if (tid->at_type == AU_IPv6) {
ADD_U_INT32(dptr, tid->at_addr[1]);
ADD_U_INT32(dptr, tid->at_addr[2]);
ADD_U_INT32(dptr, tid->at_addr[3]);
}
return (t);
}
token_t *
au_to_subject64_ex(au_id_t auid, uid_t euid, gid_t egid, uid_t ruid,
gid_t rgid, pid_t pid, au_asid_t sid, au_tid_addr_t *tid)
{
errno = ENOTSUP;
return (NULL);
}
token_t *
au_to_subject_ex(au_id_t auid, uid_t euid, gid_t egid, uid_t ruid,
gid_t rgid, pid_t pid, au_asid_t sid, au_tid_addr_t *tid)
{
return (au_to_subject32_ex(auid, euid, egid, ruid, rgid, pid, sid,
tid));
}
#if !defined(_KERNEL) && !defined(KERNEL) && defined(HAVE_AUDIT_SYSCALLS)
/*
* Collects audit information for the current process
* and creates a subject token from it
*/
token_t *
au_to_me(void)
{
auditinfo_t auinfo;
if (getaudit(&auinfo) != 0)
return (NULL);
return (au_to_subject32(auinfo.ai_auid, geteuid(), getegid(),
getuid(), getgid(), getpid(), auinfo.ai_asid, &auinfo.ai_termid));
}
#endif
/*
* token ID 1 byte
* count 4 bytes
* text count null-terminated strings
*/
token_t *
au_to_exec_args(char **argv)
{
token_t *t;
u_char *dptr = NULL;
const char *nextarg;
int i, count = 0;
size_t totlen = 0;
nextarg = *argv;
while (nextarg != NULL) {
int nextlen;
nextlen = strlen(nextarg);
totlen += nextlen + 1;
count++;
nextarg = *(argv + count);
}
totlen += count * sizeof(char); /* nul terminations. */
GET_TOKEN_AREA(t, dptr, sizeof(u_char) + sizeof(u_int32_t) + totlen);
if (t == NULL)
return (NULL);
ADD_U_CHAR(dptr, AUT_EXEC_ARGS);
ADD_U_INT32(dptr, count);
for (i = 0; i < count; i++) {
nextarg = *(argv + i);
ADD_MEM(dptr, nextarg, strlen(nextarg) + 1);
}
return (t);
}
/*
* token ID 1 byte
* count 4 bytes
* text count null-terminated strings
*/
token_t *
au_to_exec_env(char **envp)
{
token_t *t;
u_char *dptr = NULL;
int i, count = 0;
size_t totlen = 0;
const char *nextenv;
nextenv = *envp;
while (nextenv != NULL) {
int nextlen;
nextlen = strlen(nextenv);
totlen += nextlen + 1;
count++;
nextenv = *(envp + count);
}
totlen += sizeof(char) * count;
GET_TOKEN_AREA(t, dptr, sizeof(u_char) + sizeof(u_int32_t) + totlen);
if (t == NULL)
return (NULL);
ADD_U_CHAR(dptr, AUT_EXEC_ENV);
ADD_U_INT32(dptr, count);
for (i = 0; i < count; i++) {
nextenv = *(envp + i);
ADD_MEM(dptr, nextenv, strlen(nextenv) + 1);
}
return (t);
}
/*
* token ID 1 byte
* record byte count 4 bytes
* version # 1 byte [2]
* event type 2 bytes
* event modifier 2 bytes
* seconds of time 4 bytes/8 bytes (32-bit/64-bit value)
* milliseconds of time 4 bytes/8 bytes (32-bit/64-bit value)
*/
token_t *
au_to_header32_tm(int rec_size, au_event_t e_type, au_emod_t e_mod,
struct timeval tm)
{
token_t *t;
u_char *dptr = NULL;
u_int32_t timems;
GET_TOKEN_AREA(t, dptr, sizeof(u_char) + sizeof(u_int32_t) +
sizeof(u_char) + 2 * sizeof(u_int16_t) + 2 * sizeof(u_int32_t));
if (t == NULL)
return (NULL);
ADD_U_CHAR(dptr, AUT_HEADER32);
ADD_U_INT32(dptr, rec_size);
ADD_U_CHAR(dptr, AUDIT_HEADER_VERSION_OPENBSM);
ADD_U_INT16(dptr, e_type);
ADD_U_INT16(dptr, e_mod);
timems = tm.tv_usec/1000;
/* Add the timestamp */
ADD_U_INT32(dptr, tm.tv_sec);
ADD_U_INT32(dptr, timems); /* We need time in ms. */
return (t);
}
#if !defined(KERNEL) && !defined(_KERNEL)
token_t *
au_to_header32(int rec_size, au_event_t e_type, au_emod_t e_mod)
{
struct timeval tm;
if (gettimeofday(&tm, NULL) == -1)
return (NULL);
return (au_to_header32_tm(rec_size, e_type, e_mod, tm));
}
token_t *
au_to_header64(__unused int rec_size, __unused au_event_t e_type,
__unused au_emod_t e_mod)
{
errno = ENOTSUP;
return (NULL);
}
token_t *
au_to_header(int rec_size, au_event_t e_type, au_emod_t e_mod)
{
return (au_to_header32(rec_size, e_type, e_mod));
}
#endif
/*
* token ID 1 byte
* trailer magic number 2 bytes
* record byte count 4 bytes
*/
token_t *
au_to_trailer(int rec_size)
{
token_t *t;
u_char *dptr = NULL;
u_int16_t magic = TRAILER_PAD_MAGIC;
GET_TOKEN_AREA(t, dptr, sizeof(u_char) + sizeof(u_int16_t) +
sizeof(u_int32_t));
if (t == NULL)
return (NULL);
ADD_U_CHAR(dptr, AUT_TRAILER);
ADD_U_INT16(dptr, magic);
ADD_U_INT32(dptr, rec_size);
return (t);
}
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