int audit_rule_fieldpair(struct audit_rule *rule, const char *pair, int flags)
{
const char *f = pair;
char *v;
int op;
int field;
int vlen;
if (f == NULL)
return -1;
/* look for 2-char operators first
then look for 1-char operators afterwards
when found, null out the bytes under the operators to split
and set value pointer just past operator bytes
*/
if ( (v = strstr(pair, "!=")) ) {
*v++ = '\0';
*v++ = '\0';
op = AUDIT_NEGATE; // legacy
// op = AUDIT_NOT_EQUAL;
} else if ( (v = strstr(pair, ">")) ) {
return -10;
} else if ( (v = strstr(pair, "<")) ) {
return -10;
} else if ( (v = strstr(pair, "&")) ) {
return -10;
} else if ( (v = strstr(pair, "=")) ) {
*v++ = '\0';
op = 0; // legacy
// op = AUDIT_EQUAL;
}
if (v == NULL)
return -1;
if (*f == 0)
return -22;
if (*v == 0)
return -20;
audit_msg(LOG_DEBUG,"pair=%s\n", f);
if ((field = audit_name_to_field(f)) < 0)
return -2;
/* Exclude filter can be used only with MSGTYPE field */
if (flags == AUDIT_FILTER_EXCLUDE && field != AUDIT_MSGTYPE)
return -12;
audit_msg(LOG_DEBUG,"f%d%s%s\n", field, audit_operator_to_symbol(op),v);
rule->fields[rule->field_count] = field | op;
switch (field)
{
case AUDIT_UID:
case AUDIT_EUID:
case AUDIT_SUID:
case AUDIT_FSUID:
case AUDIT_LOGINUID:
// Do positive & negative separate for 32 bit systems
vlen = strlen(v);
if (isdigit((char)*(v)))
rule->values[rule->field_count] =
strtoul(v, NULL, 0);
else if (vlen >= 2 && *(v)=='-' &&
(isdigit((char)*(v+1))))
rule->values[rule->field_count] =
strtol(v, NULL, 0);
else {
if (name_to_uid(v,
&rule->values[rule->field_count])) {
audit_msg(LOG_ERR, "Unknown user: %s",
v);
return -2;
}
}
break;
case AUDIT_GID:
case AUDIT_EGID:
case AUDIT_SGID:
case AUDIT_FSGID:
if (isdigit((char)*(v)))
rule->values[rule->field_count] =
strtol(v, NULL, 0);
else {
if (name_to_gid(v,
&rule->values[rule->field_count])) {
audit_msg(LOG_ERR, "Unknown group: %s",
v);
return -2;
}
}
break;
case AUDIT_EXIT:
if (flags != AUDIT_FILTER_EXIT)
return -7;
vlen = strlen(v);
if (isdigit((char)*(v)))
rule->values[rule->field_count] =
strtol(v, NULL, 0);
else if (vlen >= 2 && *(v)=='-' &&
(isdigit((char)*(v+1))))
rule->values[rule->field_count] =
strtol(v, NULL, 0);
else {
rule->values[rule->field_count] =
audit_name_to_errno(v);
if (rule->values[rule->field_count] == 0)
return -15;
}
break;
case AUDIT_MSGTYPE:
if (flags != AUDIT_FILTER_EXCLUDE)
return -9;
if (isdigit((char)*(v)))
rule->values[rule->field_count] =
strtol(v, NULL, 0);
else
if (audit_name_to_msg_type(v) > 0)
rule->values[rule->field_count] =
audit_name_to_msg_type(v);
else
return -8;
break;
case AUDIT_ARCH:
if (audit_syscalladded)
return -3;
if (!(op == AUDIT_NEGATE || op == 0))
return -13;
if (isdigit((char)*(v))) {
int machine;
errno = 0;
audit_elf = strtoul(v, NULL, 0);
if (errno)
return -5;
// Make sure we have a valid mapping
machine = audit_elf_to_machine(audit_elf);
if (machine < 0)
return -5;
}
else {
// what do we want? i686, x86_64, ia64
// or b64, b32
int machine;
unsigned int bits=0, elf;
const char *arch=v;
if (strcasecmp("b64", arch) == 0) {
bits = __AUDIT_ARCH_64BIT;
machine = audit_detect_machine();
} else if (strcasecmp("b32", arch) == 0) {
bits = ~__AUDIT_ARCH_64BIT;
machine = audit_detect_machine();
}
else
machine = audit_name_to_machine(arch);
if (machine < 0)
return -4;
/* Here's where we fixup the machine.
* for example, they give x86_64 & want 32 bits.
* we translate that to i686. */
if (bits == ~__AUDIT_ARCH_64BIT &&
machine == MACH_86_64)
machine = MACH_X86;
else if (bits == ~__AUDIT_ARCH_64BIT &&
machine == MACH_PPC64)
machine = MACH_PPC;
else if (bits == ~__AUDIT_ARCH_64BIT &&
machine == MACH_S390X)
machine = MACH_S390;
/* Check for errors - return -6
* We don't allow 32 bit machines to specify
* 64 bit. */
switch (machine)
{
case MACH_X86:
if (bits == __AUDIT_ARCH_64BIT)
return -6;
break;
case MACH_IA64:
if (bits == ~__AUDIT_ARCH_64BIT)
return -6;
break;
case MACH_PPC:
if (bits == __AUDIT_ARCH_64BIT)
return -6;
break;
case MACH_S390:
if (bits == __AUDIT_ARCH_64BIT)
return -6;
break;
case MACH_86_64: /* fallthrough */
case MACH_PPC64: /* fallthrough */
case MACH_S390X: /* fallthrough */
break;
default:
return -6;
}
/* OK, we have the machine type, now convert
to elf. */
elf = audit_machine_to_elf(machine);
if (elf == 0)
return -5;
audit_elf = elf;
}
rule->values[rule->field_count] = audit_elf;
audit_archadded = 1;
break;
case AUDIT_FILETYPE:
if (flags != AUDIT_FILTER_EXIT && flags != AUDIT_FILTER_ENTRY)
return -17;
rule->values[rule->field_count] =
audit_name_to_ftype(v);
if (rule->values[rule->field_count] < 0) {
return -16;
}
break;
/* These are strings */
case AUDIT_SUBJ_USER:
case AUDIT_SUBJ_ROLE:
case AUDIT_SUBJ_TYPE:
case AUDIT_SUBJ_SEN:
case AUDIT_SUBJ_CLR:
case AUDIT_OBJ_USER:
case AUDIT_OBJ_ROLE:
case AUDIT_OBJ_TYPE:
case AUDIT_OBJ_LEV_LOW:
case AUDIT_OBJ_LEV_HIGH:
case AUDIT_WATCH:
case AUDIT_PERM:
case AUDIT_DIR:
case AUDIT_FILTERKEY:
return -10;
case AUDIT_ARG0...AUDIT_ARG3:
vlen = strlen(v);
if (isdigit((char)*(v)))
rule->values[rule->field_count] =
strtoul(v, NULL, 0);
else if (vlen >= 2 && *(v)=='-' &&
(isdigit((char)*(v+1))))
rule->values[rule->field_count] =
strtol(v, NULL, 0);
else
return -21;
break;
case AUDIT_DEVMAJOR...AUDIT_INODE:
case AUDIT_SUCCESS:
if (flags != AUDIT_FILTER_EXIT)
return -7;
/* fallthrough */
default:
if (field == AUDIT_INODE) {
if (!(op == AUDIT_NEGATE || op == 0))
return -13;
}
if (field == AUDIT_PPID && (flags != AUDIT_FILTER_EXIT
&& flags != AUDIT_FILTER_ENTRY))
return -17;
if (flags == AUDIT_FILTER_EXCLUDE)
return -18;
if (!isdigit((char)*(v)))
return -21;
if (field == AUDIT_INODE)
rule->values[rule->field_count] =
strtoul(v, NULL, 0);
else
rule->values[rule->field_count] =
strtol(v, NULL, 0);
break;
}
++rule->field_count;
return 0;
}
/*
* This function examines the commandline parameters and sets various
* search options. It returns a 0 on success and < 0 on failure
*/
int check_params(int count, char *vars[])
{
int c = 1;
int retval = 0;
const char *optarg;
if (count < 2) {
usage();
return -1;
}
while (c < count && retval == 0) {
// Go ahead and point to the next argument
if (c+1 < count) {
if (vars[c+1][0] != '-')
optarg = vars[c+1];
else
optarg = NULL;
} else
optarg = NULL;
switch (audit_lookup_option(vars[c])) {
case S_EVENT:
if (!optarg) {
fprintf(stderr,
"Argument is required for %s\n",
vars[c]);
retval = -1;
break;
}
if (isdigit(optarg[0])) {
errno = 0;
event_id = strtoul(optarg, NULL, 10);
if (errno) {
fprintf(stderr,
"Illegal value for audit event ID");
retval = -1;
}
c++;
} else {
fprintf(stderr,
"Audit event id must be a numeric value, was %s\n",
optarg);
retval = -1;
}
break;
case S_COMM:
if (!optarg) {
fprintf(stderr,
"Argument is required for %s\n",
vars[c]);
retval = -1;
break;
} else {
event_comm = strdup(optarg);
if (event_comm == NULL)
retval = -1;
c++;
}
break;
case S_FILENAME:
if (!optarg) {
fprintf(stderr,
"Argument is required for %s\n",
vars[c]);
retval = -1;
} else {
event_filename = strdup(optarg);
if (event_filename == NULL)
retval = -1;
c++;
}
break;
case S_KEY:
if (!optarg) {
fprintf(stderr,
"Argument is required for %s\n",
vars[c]);
retval = -1;
} else {
event_key = strdup(optarg);
if (event_key == NULL)
retval = -1;
c++;
}
break;
case S_ALL_GID:
if (!optarg) {
fprintf(stderr,
"Argument is required for %s\n",
vars[c]);
retval = -1;
break;
}
if (isdigit(optarg[0])) {
errno = 0;
event_gid = strtoul(optarg,NULL,10);
if (errno) {
fprintf(stderr,
"Numeric group ID conversion error (%s) for %s\n",
strerror(errno), optarg);
retval = -1;
}
} else {
struct group *gr ;
gr = getgrnam(optarg) ;
if (gr == NULL) {
fprintf(stderr,
"Group ID is non-numeric and unknown (%s)\n",
optarg);
retval = -1;
break;
}
event_gid = gr->gr_gid;
}
event_egid = event_gid;
event_ga = 1;
c++;
break;
case S_EFF_GID:
if (!optarg) {
fprintf(stderr,
"Argument is required for %s\n",
vars[c]);
retval = -1;
break;
}
if (isdigit(optarg[0])) {
errno = 0;
event_egid = strtoul(optarg,NULL,10);
if (errno) {
fprintf(stderr,
"Numeric group ID conversion error (%s) for %s\n",
strerror(errno), optarg);
retval = -1;
}
} else {
struct group *gr ;
gr = getgrnam(optarg) ;
if (gr == NULL) {
fprintf(stderr,
"Effective group ID is non-numeric and unknown (%s)\n",
optarg);
retval = -1;
break;
}
event_egid = gr->gr_gid;
}
c++;
break;
case S_GID:
if (!optarg) {
fprintf(stderr,
"Argument is required for %s\n",
vars[c]);
retval = -1;
break;
}
if (isdigit(optarg[0])) {
errno = 0;
event_gid = strtoul(optarg,NULL,10);
if (errno) {
fprintf(stderr,
"Numeric group ID conversion error (%s) for %s\n",
strerror(errno), optarg);
retval = -1;
}
} else {
struct group *gr ;
gr = getgrnam(optarg) ;
if (gr == NULL) {
fprintf(stderr,
"Group ID is non-numeric and unknown (%s)\n",
optarg);
retval = -1;
break;
}
event_gid = gr->gr_gid;
}
c++;
break;
case S_HELP:
usage();
exit(0);
break;
case S_HOSTNAME:
if (!optarg) {
fprintf(stderr,
"Argument is required for %s\n",
vars[c]);
retval = -1;
} else {
event_hostname = strdup(optarg);
if (event_hostname == NULL)
retval = -1;
c++;
}
break;
case S_INTERP:
if (report_format == RPT_DEFAULT)
report_format = RPT_INTERP;
else {
fprintf(stderr,
"Conflicting output format %s\n",
vars[c]);
retval = -1;
}
if (optarg) {
fprintf(stderr,
"Argument is NOT required for %s\n",
vars[c]);
retval = -1;
}
break;
case S_INFILE:
if (!optarg) {
fprintf(stderr,
"Argument is required for %s\n",
vars[c]);
retval = -1;
} else {
user_file = strdup(optarg);
if (user_file == NULL)
retval = -1;
c++;
}
break;
case S_MESSAGE_TYPE:
if (!optarg) {
fprintf(stderr,
"Argument is required for %s\n",
vars[c]);
retval = -1;
} else {
if (strcasecmp(optarg, "ALL") != 0) {
retval = parse_msg(optarg);
}
c++;
}
if (retval < 0) {
int i;
fprintf(stderr,
"Valid message types are: ALL ");
for (i=AUDIT_USER;i<=AUDIT_LAST_VIRT_MSG;i++){
const char *name;
if (i == AUDIT_WATCH_INS) // Skip a few
i = AUDIT_FIRST_USER_MSG;
name = audit_msg_type_to_name(i);
if (name)
fprintf(stderr, "%s ", name);
}
fprintf(stderr, "\n");
}
break;
case S_OBJECT:
if (!optarg) {
fprintf(stderr,
"Argument is required for %s\n",
vars[c]);
retval = -1;
break;
} else {
event_object = strdup(optarg);
if (event_object == NULL)
retval = -1;
c++;
}
break;
case S_PPID:
if (!optarg) {
fprintf(stderr,
"Argument is required for %s\n",
vars[c]);
retval = -1;
break;
}
if (isdigit(optarg[0])) {
errno = 0;
event_ppid = strtol(optarg,NULL,10);
if (errno)
retval = -1;
c++;
} else {
fprintf(stderr,
"Parent process id must be a numeric value, was %s\n",
optarg);
retval = -1;
}
break;
case S_PID:
if (!optarg) {
fprintf(stderr,
"Argument is required for %s\n",
vars[c]);
retval = -1;
break;
}
if (isdigit(optarg[0])) {
errno = 0;
event_pid = strtol(optarg,NULL,10);
if (errno)
retval = -1;
c++;
} else {
fprintf(stderr,
"Process id must be a numeric value, was %s\n",
optarg);
retval = -1;
}
break;
case S_RAW:
if (report_format == RPT_DEFAULT)
report_format = RPT_RAW;
else {
fprintf(stderr,
"Conflicting output format --raw\n");
retval = -1;
}
if (optarg) {
fprintf(stderr,
"Argument is NOT required for --raw\n");
retval = -1;
}
break;
case S_NODE:
if (!optarg) {
fprintf(stderr,
"Argument is required for %s\n",
vars[c]);
retval = -1;
} else {
snode sn;
c++;
if (!event_node_list) {
event_node_list = malloc(sizeof (slist));
if (!event_node_list) {
retval = -1;
break;
}
slist_create(event_node_list);
}
sn.str = strdup(optarg);
sn.key = NULL;
sn.hits=0;
slist_append(event_node_list, &sn);
}
break;
case S_SYSCALL:
if (!optarg) {
fprintf(stderr,
"Argument is required for %s\n",
vars[c]);
retval = -1;
break;
}
if (isdigit(optarg[0])) {
errno = 0;
event_syscall = (int)strtoul(optarg, NULL, 10);
if (errno) {
fprintf(stderr,
"Syscall numeric conversion error (%s) for %s\n",
strerror(errno), optarg);
retval = -1;
}
} else {
int machine;
machine = audit_detect_machine();
if (machine < 0) {
fprintf(stderr,
"Error detecting machine type");
retval = -1;
break;
}
event_syscall = audit_name_to_syscall(optarg,
machine);
if (event_syscall == -1) {
fprintf(stderr,
"Syscall %s not found\n",
optarg);
retval = -1;
}
}
c++;
break;
case S_CONTEXT:
if (!optarg) {
fprintf(stderr,
"Argument is required for %s\n",
vars[c]);
retval = -1;
break;
} else {
event_subject = strdup(optarg);
if (event_subject == NULL)
retval = -1;
event_object = strdup(optarg);
if (event_object == NULL)
retval = -1;
event_se = 1;
c++;
}
break;
case S_SUBJECT:
if (!optarg) {
fprintf(stderr,
"Argument is required for %s\n",
vars[c]);
retval = -1;
break;
} else {
event_subject = strdup(optarg);
if (event_subject == NULL)
retval = -1;
c++;
}
break;
case S_OSUCCESS:
if (!optarg) {
fprintf(stderr,
"Argument is required for %s\n",
vars[c]);
retval = -1;
break;
}
if ( (strstr(optarg, "yes")!=NULL) ||
(strstr(optarg, "no")!=NULL) ) {
if (strcmp(optarg, "yes") == 0)
event_success = S_SUCCESS;
else
event_success = S_FAILED;
} else {
fprintf(stderr,
"Success must be 'yes' or 'no'.\n");
retval = -1;
}
c++;
break;
case S_SESSION:
if (!optarg) {
if ((c+1 < count) && vars[c+1])
optarg = vars[c+1];
else {
fprintf(stderr,
"Argument is required for %s\n",
vars[c]);
retval = -1;
break;
}
}
{
size_t len = strlen(optarg);
if (isdigit(optarg[0])) {
errno = 0;
event_session_id = strtol(optarg,NULL,10);
if (errno)
retval = -1;
c++;
} else if (len >= 2 && *(optarg)=='-' &&
(isdigit(optarg[1]))) {
errno = 0;
event_session_id = strtol(optarg, NULL, 0);
if (errno) {
retval = -1;
fprintf(stderr, "Error converting %s\n",
optarg);
}
c++;
} else {
fprintf(stderr,
"Session id must be a numeric value, was %s\n",
optarg);
retval = -1;
}
}
break;
case S_EXIT:
if (!optarg) {
if ((c+1 < count) && vars[c+1])
optarg = vars[c+1];
else {
fprintf(stderr,
"Argument is required for %s\n",
vars[c]);
retval = -1;
break;
}
}
{
size_t len = strlen(optarg);
if (isdigit(optarg[0])) {
errno = 0;
event_exit = strtol(optarg, NULL, 0);
if (errno) {
retval = -1;
fprintf(stderr, "Error converting %s\n",
optarg);
}
} else if (len >= 2 && *(optarg)=='-' &&
(isdigit(optarg[1]))) {
errno = 0;
event_exit = strtol(optarg, NULL, 0);
if (errno) {
retval = -1;
fprintf(stderr, "Error converting %s\n",
optarg);
}
} else {
event_exit = audit_name_to_errno(optarg);
if (event_exit == 0) {
retval = -1;
fprintf(stderr,
"Unknown errno, was %s\n",
optarg);
}
}
c++;
if (retval != -1)
event_exit_is_set = 1;
}
break;
case S_TIME_END:
if (optarg) {
if ( (c+2 < count) && vars[c+2] &&
(vars[c+2][0] != '-') ) {
/* Have both date and time - check order*/
if (strchr(optarg, ':')) {
if (ausearch_time_end(vars[c+2],
optarg) != 0)
retval = -1;
} else {
if (ausearch_time_end(optarg,
vars[c+2]) != 0)
retval = -1;
}
c++;
} else {
// Check against recognized words
int t = lookup_time(optarg);
if (t >= 0) {
if (ausearch_time_end(optarg,
NULL) != 0)
retval = -1;
} else if ( (strchr(optarg, ':')) == NULL) {
/* Only have date */
if (ausearch_time_end(optarg,
NULL) != 0)
retval = -1;
} else {
/* Only have time */
if (ausearch_time_end(NULL,
optarg) != 0)
retval = -1;
}
}
c++;
break;
}
fprintf(stderr,
"%s requires either date and/or time\n",
vars[c]);
retval = -1;
break;
case S_TIME_START:
if (optarg) {
if ( (c+2 < count) && vars[c+2] &&
(vars[c+2][0] != '-') ) {
/* Have both date and time - check order */
if (strchr(optarg, ':')) {
if (ausearch_time_start(
vars[c+2], optarg) != 0)
retval = -1;
} else {
if (ausearch_time_start(optarg,
vars[c+2]) != 0)
retval = -1;
}
c++;
} else {
// Check against recognized words
int t = lookup_time(optarg);
if (t >= 0) {
if (ausearch_time_start(optarg,
"00:00:00") != 0)
retval = -1;
}
else if ( strchr(optarg, ':') == NULL) {
/* Only have date */
if (ausearch_time_start(optarg,
"00:00:00") != 0)
retval = -1;
} else {
/* Only have time */
if (ausearch_time_start(NULL,
optarg) != 0)
retval = -1;
}
}
c++;
break;
}
fprintf(stderr,
"%s requires either date and/or time\n",
vars[c]);
retval = -1;
break;
case S_TERMINAL:
if (!optarg) {
fprintf(stderr,
"Argument is required for %s\n",
vars[c]);
retval = -1;
} else {
event_terminal = strdup(optarg);
if (event_terminal == NULL)
retval = -1;
c++;
}
break;
case S_UID:
if (!optarg) {
fprintf(stderr,
"Argument is required for %s\n",
vars[c]);
retval = -1;
break;
}
if (isdigit(optarg[0])) {
errno = 0;
event_uid = strtoul(optarg,NULL,10);
if (errno) {
fprintf(stderr,
"Numeric user ID conversion error (%s) for %s\n",
strerror(errno), optarg);
retval = -1;
}
} else {
struct passwd *pw;
pw = getpwnam(optarg);
if (pw == NULL) {
fprintf(stderr,
"Effective user ID is non-numeric and unknown (%s)\n",
optarg);
retval = -1;
break;
}
event_uid = pw->pw_uid;
}
c++;
break;
case S_EFF_UID:
if (!optarg) {
fprintf(stderr,
"Argument is required for %s\n",
vars[c]);
retval = -1;
break;
}
if (isdigit(optarg[0])) {
errno = 0;
event_euid = strtoul(optarg,NULL,10);
if (errno) {
fprintf(stderr,
"Numeric user ID conversion error (%s) for %s\n",
strerror(errno), optarg);
retval = -1;
}
} else {
struct passwd *pw ;
pw = getpwnam(optarg) ;
if (pw == NULL) {
fprintf(stderr,
"User ID is non-numeric and unknown (%s)\n",
optarg);
retval = -1;
break;
}
event_euid = pw->pw_uid;
}
c++;
break;
case S_ALL_UID:
if (!optarg) {
fprintf(stderr,
"Argument is required for %s\n",
vars[c]);
retval = -1;
break;
}
if (isdigit(optarg[0])) {
errno = 0;
event_uid = strtoul(optarg,NULL,10);
if (errno) {
fprintf(stderr,
"Numeric user ID conversion error (%s) for %s\n",
strerror(errno), optarg);
retval = -1;
}
} else {
struct passwd *pw ;
pw = getpwnam(optarg) ;
if (pw == NULL) {
fprintf(stderr,
"User ID is non-numeric and unknown (%s)\n",
optarg);
retval = -1;
break;
}
event_uid = pw->pw_uid;
}
event_ua = 1;
event_euid = event_uid;
event_loginuid = event_uid;
c++;
break;
case S_LOGINID:
if (!optarg) {
if ((c+1 < count) && vars[c+1])
optarg = vars[c+1];
else {
fprintf(stderr,
"Argument is required for %s\n",
vars[c]);
retval = -1;
break;
}
}
{
size_t len = strlen(optarg);
if (isdigit(optarg[0])) {
errno = 0;
event_loginuid = strtoul(optarg,NULL,10);
if (errno) {
fprintf(stderr,
"Numeric user ID conversion error (%s) for %s\n",
strerror(errno), optarg);
retval = -1;
}
} else if (len >= 2 && *(optarg)=='-' &&
(isdigit(optarg[1]))) {
errno = 0;
event_loginuid = strtol(optarg, NULL, 0);
if (errno) {
retval = -1;
fprintf(stderr, "Error converting %s\n",
optarg);
}
} else {
struct passwd *pw ;
pw = getpwnam(optarg) ;
if (pw == NULL) {
fprintf(stderr,
"Login user ID is non-numeric and unknown (%s)\n",
optarg);
retval = -1;
break;
}
event_loginuid = pw->pw_uid;
}
}
c++;
break;
case S_UUID:
if (!optarg) {
fprintf(stderr,
"Argument is required for %s\n",
vars[c]);
retval = -1;
} else {
event_uuid = strdup(optarg);
if (event_uuid == NULL) {
retval = -1;
}
c++;
}
break;
case S_VMNAME:
if (!optarg) {
fprintf(stderr,
"Argument is required for %s\n",
vars[c]);
retval = -1;
} else {
event_vmname= strdup(optarg);
if (event_vmname == NULL) {
retval = -1;
}
c++;
}
break;
case S_VERSION:
printf("ausearch version %s\n", VERSION);
exit(0);
break;
case S_EXACT_MATCH:
event_exact_match=1;
break;
case S_IN_LOGS:
force_logs = 1;
break;
case S_JUST_ONE:
just_one = 1;
break;
case S_EXECUTABLE:
if (!optarg) {
fprintf(stderr,
"Argument is required for %s\n",
vars[c]);
retval = -1;
} else {
event_exe = strdup(optarg);
if (event_exe == NULL)
retval = -1;
c++;
}
break;
case S_LINEBUFFERED:
line_buffered = 1;
break;
default:
fprintf(stderr, "%s is an unsupported option\n",
vars[c]);
retval = -1;
break;
}
c++;
}
return retval;
}
int audit_rule_fieldpair_data(struct audit_rule_data **rulep, const char *pair,
int flags)
{
const char *f = pair;
char *v;
int op;
int field;
int vlen;
int offset;
struct audit_rule_data *rule = *rulep;
if (f == NULL)
return -1;
/* look for 2-char operators first
then look for 1-char operators afterwards
when found, null out the bytes under the operators to split
and set value pointer just past operator bytes
*/
if ( (v = strstr(pair, "!=")) ) {
*v++ = '\0';
*v++ = '\0';
op = AUDIT_NOT_EQUAL;
} else if ( (v = strstr(pair, ">=")) ) {
*v++ = '\0';
*v++ = '\0';
op = AUDIT_GREATER_THAN_OR_EQUAL;
} else if ( (v = strstr(pair, "<=")) ) {
*v++ = '\0';
*v++ = '\0';
op = AUDIT_LESS_THAN_OR_EQUAL;
} else if ( (v = strstr(pair, "&=")) ) {
*v++ = '\0';
*v++ = '\0';
op = AUDIT_BIT_TEST;
} else if ( (v = strstr(pair, "=")) ) {
*v++ = '\0';
op = AUDIT_EQUAL;
} else if ( (v = strstr(pair, ">")) ) {
*v++ = '\0';
op = AUDIT_GREATER_THAN;
} else if ( (v = strstr(pair, "<")) ) {
*v++ = '\0';
op = AUDIT_LESS_THAN;
} else if ( (v = strstr(pair, "&")) ) {
*v++ = '\0';
op = AUDIT_BIT_MASK;
}
if (v == NULL)
return -1;
if (*f == 0)
return -22;
if (*v == 0)
return -20;
if ((field = audit_name_to_field(f)) < 0)
return -2;
/* Exclude filter can be used only with MSGTYPE field */
if (flags == AUDIT_FILTER_EXCLUDE && field != AUDIT_MSGTYPE)
return -12;
rule->fields[rule->field_count] = field;
rule->fieldflags[rule->field_count] = op;
switch (field)
{
case AUDIT_UID:
case AUDIT_EUID:
case AUDIT_SUID:
case AUDIT_FSUID:
case AUDIT_LOGINUID:
case AUDIT_OBJ_UID:
case AUDIT_OBJ_GID:
// Do positive & negative separate for 32 bit systems
vlen = strlen(v);
if (isdigit((char)*(v)))
rule->values[rule->field_count] =
strtoul(v, NULL, 0);
else if (vlen >= 2 && *(v)=='-' &&
(isdigit((char)*(v+1))))
rule->values[rule->field_count] =
strtol(v, NULL, 0);
else {
if (strcmp(v, "unset") == 0)
rule->values[rule->field_count] =
4294967295;
else if (audit_name_to_uid(v,
&rule->values[rule->field_count])) {
audit_msg(LOG_ERR, "Unknown user: %s",
v);
return -2;
}
}
break;
case AUDIT_GID:
case AUDIT_EGID:
case AUDIT_SGID:
case AUDIT_FSGID:
if (isdigit((char)*(v)))
rule->values[rule->field_count] =
strtol(v, NULL, 0);
else {
if (audit_name_to_gid(v,
&rule->values[rule->field_count])) {
audit_msg(LOG_ERR, "Unknown group: %s",
v);
return -2;
}
}
break;
case AUDIT_EXIT:
if (flags != AUDIT_FILTER_EXIT)
return -7;
vlen = strlen(v);
if (isdigit((char)*(v)))
rule->values[rule->field_count] =
strtol(v, NULL, 0);
else if (vlen >= 2 && *(v)=='-' &&
(isdigit((char)*(v+1))))
rule->values[rule->field_count] =
strtol(v, NULL, 0);
else {
rule->values[rule->field_count] =
audit_name_to_errno(v);
if (rule->values[rule->field_count] == 0)
return -15;
}
break;
case AUDIT_MSGTYPE:
if (flags != AUDIT_FILTER_EXCLUDE &&
flags != AUDIT_FILTER_USER)
return -9;
if (isdigit((char)*(v)))
rule->values[rule->field_count] =
strtol(v, NULL, 0);
else
if (audit_name_to_msg_type(v) > 0)
rule->values[rule->field_count] =
audit_name_to_msg_type(v);
else
return -8;
break;
/* These next few are strings */
case AUDIT_OBJ_USER:
case AUDIT_OBJ_ROLE:
case AUDIT_OBJ_TYPE:
case AUDIT_OBJ_LEV_LOW:
case AUDIT_OBJ_LEV_HIGH:
case AUDIT_WATCH:
case AUDIT_DIR:
/* Watch & object filtering is invalid on anything
* but exit */
if (flags != AUDIT_FILTER_EXIT)
return -7;
if (field == AUDIT_WATCH || field == AUDIT_DIR)
_audit_permadded = 1;
/* fallthrough */
case AUDIT_SUBJ_USER:
case AUDIT_SUBJ_ROLE:
case AUDIT_SUBJ_TYPE:
case AUDIT_SUBJ_SEN:
case AUDIT_SUBJ_CLR:
case AUDIT_FILTERKEY:
if (field == AUDIT_FILTERKEY && !(_audit_syscalladded || _audit_permadded))
return -19;
vlen = strlen(v);
if (field == AUDIT_FILTERKEY &&
vlen > AUDIT_MAX_KEY_LEN)
return -11;
else if (vlen > PATH_MAX)
return -11;
rule->values[rule->field_count] = vlen;
offset = rule->buflen;
rule->buflen += vlen;
*rulep = realloc(rule, sizeof(*rule) + rule->buflen);
if (*rulep == NULL) {
free(rule);
audit_msg(LOG_ERR, "Cannot realloc memory!\n");
return -3;
} else {
rule = *rulep;
}
strncpy(&rule->buf[offset], v, vlen);
break;
case AUDIT_ARCH:
if (_audit_syscalladded)
return -3;
if (!(op == AUDIT_NOT_EQUAL || op == AUDIT_EQUAL))
return -13;
if (isdigit((char)*(v))) {
int machine;
errno = 0;
_audit_elf = strtoul(v, NULL, 0);
if (errno)
return -5;
// Make sure we have a valid mapping
machine = audit_elf_to_machine(_audit_elf);
if (machine < 0)
return -5;
}
else {
// what do we want? i686, x86_64, ia64
// or b64, b32
int machine;
unsigned int bits=0, elf;
const char *arch=v;
if (strcasecmp("b64", arch) == 0) {
bits = __AUDIT_ARCH_64BIT;
machine = audit_detect_machine();
} else if (strcasecmp("b32", arch) == 0) {
bits = ~__AUDIT_ARCH_64BIT;
machine = audit_detect_machine();
}
else
machine = audit_name_to_machine(arch);
if (machine < 0)
return -4;
/* Here's where we fixup the machine.
* for example, they give x86_64 & want 32 bits.
* we translate that to i686. */
if (bits == ~__AUDIT_ARCH_64BIT &&
machine == MACH_86_64)
machine = MACH_X86;
else if (bits == ~__AUDIT_ARCH_64BIT &&
machine == MACH_PPC64)
machine = MACH_PPC;
else if (bits == ~__AUDIT_ARCH_64BIT &&
machine == MACH_S390X)
machine = MACH_S390;
/* Check for errors - return -6
* We don't allow 32 bit machines to specify
* 64 bit. */
switch (machine)
{
case MACH_X86:
if (bits == __AUDIT_ARCH_64BIT)
return -6;
break;
case MACH_IA64:
if (bits == ~__AUDIT_ARCH_64BIT)
return -6;
break;
case MACH_PPC:
if (bits == __AUDIT_ARCH_64BIT)
return -6;
break;
case MACH_S390:
if (bits == __AUDIT_ARCH_64BIT)
return -6;
break;
#ifdef WITH_ARMEB
case MACH_ARMEB:
if (bits == __AUDIT_ARCH_64BIT)
return -6;
break;
#endif
#ifdef WITH_AARCH64
case MACH_AARCH64:
if (bits != __AUDIT_ARCH_64BIT)
return -6;
break;
#endif
case MACH_86_64: /* fallthrough */
case MACH_PPC64: /* fallthrough */
case MACH_S390X: /* fallthrough */
break;
default:
return -6;
}
/* OK, we have the machine type, now convert
to elf. */
elf = audit_machine_to_elf(machine);
if (elf == 0)
return -5;
_audit_elf = elf;
}
rule->values[rule->field_count] = _audit_elf;
_audit_archadded = 1;
break;
case AUDIT_PERM:
if (flags != AUDIT_FILTER_EXIT)
return -7;
else if (op != AUDIT_EQUAL)
return -13;
else {
unsigned int i, len, val = 0;
len = strlen(v);
if (len > 4)
return -11;
for (i = 0; i < len; i++) {
switch (tolower(v[i])) {
case 'r':
val |= AUDIT_PERM_READ;
break;
case 'w':
val |= AUDIT_PERM_WRITE;
break;
case 'x':
val |= AUDIT_PERM_EXEC;
break;
case 'a':
val |= AUDIT_PERM_ATTR;
break;
default:
return -14;
}
}
rule->values[rule->field_count] = val;
}
break;
case AUDIT_FILETYPE:
if (!(flags == AUDIT_FILTER_EXIT || flags == AUDIT_FILTER_ENTRY))
return -17;
rule->values[rule->field_count] =
audit_name_to_ftype(v);
if ((int)rule->values[rule->field_count] < 0) {
return -16;
}
break;
case AUDIT_ARG0...AUDIT_ARG3:
vlen = strlen(v);
if (isdigit((char)*(v)))
rule->values[rule->field_count] =
strtoul(v, NULL, 0);
else if (vlen >= 2 && *(v)=='-' &&
(isdigit((char)*(v+1))))
rule->values[rule->field_count] =
strtol(v, NULL, 0);
else
return -21;
break;
case AUDIT_DEVMAJOR...AUDIT_INODE:
case AUDIT_SUCCESS:
if (flags != AUDIT_FILTER_EXIT)
return -7;
/* fallthrough */
default:
if (field == AUDIT_INODE) {
if (!(op == AUDIT_NOT_EQUAL ||
op == AUDIT_EQUAL))
return -13;
}
if (field == AUDIT_PPID && !(flags == AUDIT_FILTER_EXIT
|| flags == AUDIT_FILTER_ENTRY))
return -17;
if (!isdigit((char)*(v)))
return -21;
if (field == AUDIT_INODE)
rule->values[rule->field_count] =
strtoul(v, NULL, 0);
else
rule->values[rule->field_count] =
strtol(v, NULL, 0);
break;
}
rule->field_count++;
return 0;
}
