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;
}
/*
* returns: -3 deprecated, -2 success - no reply, -1 error - noreply,
* 0 success - reply, > 0 success - rule
*/
static int setopt(int count, int lineno, char *vars[])
{
int c;
int retval = 0, rc;
optind = 0;
opterr = 0;
key[0] = 0;
keylen = AUDIT_MAX_KEY_LEN;
while ((retval >= 0) && (c = getopt(count, vars,
"hicslDvtC:e:f:r:b:a:A:d:S:F:m:R:w:W:k:p:q:")) != EOF) {
int flags = AUDIT_FILTER_UNSET;
rc = 10; // Init to something impossible to see if unused.
switch (c) {
case 'h':
usage();
retval = -1;
break;
case 'i':
ignore = 1;
retval = -2;
break;
case 'c':
ignore = 1;
continue_error = 1;
retval = -2;
break;
case 's':
retval = audit_request_status(fd);
if (retval <= 0)
retval = -1;
else
retval = 0; /* success - just get the reply */
break;
case 'e':
if (optarg && ((strcmp(optarg, "0") == 0) ||
(strcmp(optarg, "1") == 0) ||
(strcmp(optarg, "2") == 0))) {
if (audit_set_enabled(fd, strtoul(optarg,NULL,0)) > 0)
audit_request_status(fd);
else
retval = -1;
} else {
fprintf(stderr, "Enable must be 0, 1, or 2 was %s\n",
optarg);
retval = -1;
}
break;
case 'f':
if (optarg && ((strcmp(optarg, "0") == 0) ||
(strcmp(optarg, "1") == 0) ||
(strcmp(optarg, "2") == 0))) {
if (audit_set_failure(fd, strtoul(optarg,NULL,0)) > 0)
audit_request_status(fd);
else
return -1;
} else {
fprintf(stderr, "Failure must be 0, 1, or 2 was %s\n",
optarg);
retval = -1;
}
break;
case 'r':
if (optarg && isdigit(optarg[0])) {
uint32_t rate;
errno = 0;
rate = strtoul(optarg,NULL,0);
if (errno) {
fprintf(stderr, "Error converting rate\n");
return -1;
}
if (audit_set_rate_limit(fd, rate) > 0)
audit_request_status(fd);
else
return -1;
} else {
fprintf(stderr, "Rate must be a numeric value was %s\n",
optarg);
retval = -1;
}
break;
case 'b':
if (optarg && isdigit(optarg[0])) {
uint32_t limit;
errno = 0;
limit = strtoul(optarg,NULL,0);
if (errno) {
fprintf(stderr, "Error converting backlog\n");
return -1;
}
if (audit_set_backlog_limit(fd, limit) > 0)
audit_request_status(fd);
else
return -1;
} else {
fprintf(stderr,
"Backlog must be a numeric value was %s\n",
optarg);
retval = -1;
}
break;
case 'l':
if (count > 4 || count == 3) {
fprintf(stderr,
"Wrong number of options for list request\n");
retval = -1;
break;
}
if (count == 4) {
if (strcmp(vars[optind], "-k") == 0) {
strncat(key, vars[3], keylen);
count -= 2;
} else {
fprintf(stderr,
"Only the -k option is allowed\n");
retval = -1;
break;
}
}
if (audit_request_rule_list(fd))
retval = -2;
else
retval = -1;
break;
case 'a':
if (strstr(optarg, "task") && _audit_syscalladded) {
fprintf(stderr,
"Syscall auditing requested for task list\n");
retval = -1;
} else {
rc = audit_rule_setup(optarg, &add, &action, lineno);
if (rc == 3) {
fprintf(stderr,
"Multiple rule insert/delete operations are not allowed\n");
retval = -1;
} else if (rc == 2) {
fprintf(stderr,
"Append rule - bad keyword %s\n",
optarg);
retval = -1;
} else if (rc == 1) {
fprintf(stderr,
"Append rule - possible is deprecated\n");
return -3; /* deprecated - eat it */
} else
retval = 1; /* success - please send */
}
break;
case 'A':
if (strstr(optarg, "task") && _audit_syscalladded) {
fprintf(stderr,
"Error: syscall auditing requested for task list\n");
retval = -1;
} else {
rc = audit_rule_setup(optarg, &add, &action, lineno);
if (rc == 3) {
fprintf(stderr,
"Multiple rule insert/delete operations are not allowed\n");
retval = -1;
} else if (rc == 2) {
fprintf(stderr,
"Add rule - bad keyword %s\n", optarg);
retval = -1;
} else if (rc == 1) {
fprintf(stderr,
"Append rule - possible is deprecated\n");
return -3; /* deprecated - eat it */
} else {
add |= AUDIT_FILTER_PREPEND;
retval = 1; /* success - please send */
}
}
break;
case 'd':
rc = audit_rule_setup(optarg, &del, &action, lineno);
if (rc == 3) {
fprintf(stderr,
"Multiple rule insert/delete operations are not allowed\n");
retval = -1;
} else if (rc == 2) {
fprintf(stderr, "Delete rule - bad keyword %s\n",
optarg);
retval = -1;
} else if (rc == 1) {
fprintf(stderr,
"Delete rule - possible is deprecated\n");
return -3; /* deprecated - eat it */
} else
retval = 1; /* success - please send */
break;
case 'S': {
int unknown_arch = !_audit_elf;
/* Do some checking to make sure that we are not adding a
* syscall rule to a list that does not make sense. */
if (((add & (AUDIT_FILTER_MASK|AUDIT_FILTER_UNSET)) ==
AUDIT_FILTER_TASK || (del &
(AUDIT_FILTER_MASK|AUDIT_FILTER_UNSET)) ==
AUDIT_FILTER_TASK)) {
fprintf(stderr,
"Error: syscall auditing being added to task list\n");
return -1;
} else if (((add & (AUDIT_FILTER_MASK|AUDIT_FILTER_UNSET)) ==
AUDIT_FILTER_USER || (del &
(AUDIT_FILTER_MASK|AUDIT_FILTER_UNSET)) ==
AUDIT_FILTER_USER)) {
fprintf(stderr,
"Error: syscall auditing being added to user list\n");
return -1;
} else if (exclude) {
fprintf(stderr,
"Error: syscall auditing cannot be put on exclude list\n");
return -1;
} else {
if (unknown_arch) {
int machine;
unsigned int elf;
machine = audit_detect_machine();
if (machine < 0) {
fprintf(stderr,
"Error detecting machine type\n");
return -1;
}
elf = audit_machine_to_elf(machine);
if (elf == 0) {
fprintf(stderr,
"Error looking up elf type\n");
return -1;
}
_audit_elf = elf;
}
}
rc = audit_rule_syscallbyname_data(rule_new, optarg);
switch (rc)
{
case 0:
_audit_syscalladded = 1;
if (unknown_arch && add != AUDIT_FILTER_UNSET)
check_rule_mismatch(lineno, optarg);
break;
case -1:
fprintf(stderr, "Syscall name unknown: %s\n",
optarg);
retval = -1;
break;
case -2:
fprintf(stderr, "Elf type unknown: 0x%x\n",
_audit_elf);
retval = -1;
break;
}}
break;
case 'F':
if (add != AUDIT_FILTER_UNSET)
flags = add & AUDIT_FILTER_MASK;
else if (del != AUDIT_FILTER_UNSET)
flags = del & AUDIT_FILTER_MASK;
// if the field is arch & there is a -t option...we
// can allow it
else if ((optind >= count) || (strstr(optarg, "arch=") == NULL)
|| (strcmp(vars[optind], "-t") != 0)) {
fprintf(stderr, "List must be given before field\n");
retval = -1;
break;
}
rc = audit_rule_fieldpair_data(&rule_new,optarg,flags);
if (rc != 0) {
audit_number_to_errmsg(rc, optarg);
retval = -1;
} else {
if (rule_new->fields[rule_new->field_count-1] ==
AUDIT_PERM)
_audit_permadded = 1;
}
break;
case 'C':
if (add != AUDIT_FILTER_UNSET)
flags = add & AUDIT_FILTER_MASK;
else if (del != AUDIT_FILTER_UNSET)
flags = del & AUDIT_FILTER_MASK;
rc = audit_rule_interfield_comp_data(&rule_new, optarg, flags);
if (rc != 0) {
audit_number_to_errmsg(rc, optarg);
retval = -1;
} else {
if (rule_new->fields[rule_new->field_count - 1] ==
AUDIT_PERM)
_audit_permadded = 1;
}
break;
case 'm':
if (count > 3) {
fprintf(stderr,
"The -m option must be only the only option and takes 1 parameter\n");
retval = -1;
} else if (audit_log_user_message( fd, AUDIT_USER,
optarg, NULL, NULL, NULL, 1) <= 0)
retval = -1;
else
return -2; // success - no reply for this
break;
case 'R':
fprintf(stderr, "Error - nested rule files not supported\n");
retval = -1;
break;
case 'D':
if (count > 4 || count == 3) {
fprintf(stderr,
"Wrong number of options for Delete all request\n");
retval = -1;
break;
}
if (count == 4) {
if (strcmp(vars[optind], "-k") == 0) {
strncat(key, vars[3], keylen);
count -= 2;
} else {
fprintf(stderr,
"Only the -k option is allowed\n");
retval = -1;
break;
}
}
retval = delete_all_rules(fd);
if (retval == 0) {
(void)audit_request_rule_list(fd);
key[0] = 0;
retval = -2;
}
break;
case 'w':
if (add != AUDIT_FILTER_UNSET ||
del != AUDIT_FILTER_UNSET) {
fprintf(stderr,
"watch option can't be given with a syscall\n");
retval = -1;
} else if (optarg) {
add = AUDIT_FILTER_EXIT;
action = AUDIT_ALWAYS;
_audit_syscalladded = 1;
retval = audit_setup_watch_name(&rule_new, optarg);
} else {
fprintf(stderr, "watch option needs a path\n");
retval = -1;
}
break;
case 'W':
if (optarg) {
del = AUDIT_FILTER_EXIT;
action = AUDIT_ALWAYS;
_audit_syscalladded = 1;
retval = audit_setup_watch_name(&rule_new, optarg);
} else {
fprintf(stderr, "watch option needs a path\n");
retval = -1;
}
break;
case 'k':
if (!(_audit_syscalladded || _audit_permadded ) ||
(add==AUDIT_FILTER_UNSET &&
del==AUDIT_FILTER_UNSET)) {
fprintf(stderr,
"key option needs a watch or syscall given prior to it\n");
retval = -1;
} else if (!optarg) {
fprintf(stderr, "key option needs a value\n");
retval = -1;
} else if ((strlen(optarg)+strlen(key)+(!!key[0])) >
AUDIT_MAX_KEY_LEN) {
fprintf(stderr, "key option exceeds size limit\n");
retval = -1;
} else {
if (strncmp(optarg, "ids-", 4) == 0) {
if (check_ids_key(optarg)) {
retval = -1;
break;
}
}
if (strchr(optarg, AUDIT_KEY_SEPARATOR))
fprintf(stderr,
"key %s has illegal character\n", optarg);
if (key[0]) { // Add the separator if we need to
strcat(key, key_sep);
keylen--;
}
strncat(key, optarg, keylen);
keylen = AUDIT_MAX_KEY_LEN - strlen(key);
}
break;
case 'p':
if (!add && !del) {
fprintf(stderr,
"permission option needs a watch given prior to it\n");
retval = -1;
} else if (!optarg) {
fprintf(stderr, "permission option needs a filter\n");
retval = -1;
} else
retval = audit_setup_perms(rule_new, optarg);
break;
case 'q':
if (_audit_syscalladded) {
fprintf(stderr,
"Syscall auditing requested for make equivalent\n");
retval = -1;
} else {
char *mp, *sub;
retval = equiv_parse(optarg, &mp, &sub);
if (retval < 0) {
fprintf(stderr,
"Error parsing equivalent parts\n");
retval = -1;
} else {
retval = audit_make_equivalent(fd, mp, sub);
if (retval <= 0) {
retval = -1;
} else
return -2; // success - no reply needed
}
}
break;
case 't':
retval = audit_trim_subtrees(fd);
if (retval <= 0)
retval = -1;
else
return -2; // success - no reply for this
break;
case 'v':
printf("auditctl version %s\n", VERSION);
retval = -2;
break;
default:
usage();
retval = -1;
break;
}
}
/* catch extra args or errors where the user types "- s" */
if (optind == 1)
retval = -1;
else if ((optind < count) && (retval != -1)) {
fprintf(stderr, "parameter passed without an option given\n");
retval = -1;
}
/* See if we were adding a key */
if (key[0] && list_requested == 0) {
int flags = 0;
char *cmd=NULL;
/* Get the flag */
if (add != AUDIT_FILTER_UNSET)
flags = add & AUDIT_FILTER_MASK;
else if (del != AUDIT_FILTER_UNSET)
flags = del & AUDIT_FILTER_MASK;
/* Build the command */
asprintf(&cmd, "key=%s", key);
if (cmd) {
/* Add this to the rule */
int ret = audit_rule_fieldpair_data(&rule_new, cmd, flags);
if (ret < 0)
retval = -1;
free(cmd);
} else {
fprintf(stderr, "Out of memory adding key\n");
retval = -1;
}
}
if (retval == -1 && errno == ECONNREFUSED)
fprintf(stderr, "The audit system is disabled\n");
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;
}
