static int convert_str_to_msg(const char *optarg)
{
int tmp, retval = 0;
if (isdigit(optarg[0])) {
errno = 0;
tmp = strtoul(optarg, NULL, 10);
if (errno) {
fprintf(stderr,
"Numeric message type conversion error (%s) for %s\n",
strerror(errno), optarg);
retval = -1;
}
} else {
tmp = audit_name_to_msg_type(optarg);
if (tmp < 0)
retval = -1;
}
if (retval == 0) {
if (event_type == NULL) {
event_type = malloc(sizeof(ilist));
if (event_type == NULL)
return -1;
ilist_create(event_type);
}
ilist_append(event_type, tmp, 1, 0);
}
return retval;
}
/*
* This function will look at the line and pick out pieces of it.
*/
static int extract_timestamp(const char *b, event *e)
{
char *ptr, *tmp, *tnode, *ttype;
e->node = NULL;
tmp = strndupa(b, 120);
ptr = strtok(tmp, " ");
if (ptr) {
// Check to see if this is the node info
if (*ptr == 'n') {
tnode = ptr+5;
ptr = strtok(NULL, " ");
} else
tnode = NULL;
// at this point we have type=
ttype = ptr+5;
// Now should be pointing to msg=
ptr = strtok(NULL, " ");
if (ptr) {
if (*(ptr+9) == '(')
ptr+=9;
else
ptr = strchr(ptr, '(');
if (ptr) {
// now we should be pointed at the timestamp
char *eptr;
ptr++;
eptr = strchr(ptr, ')');
if (eptr)
*eptr = 0;
if (str2event(ptr, e)) {
fprintf(stderr,
"Error extracting time stamp (%s)\n",
ptr);
return 0;
} else if ((start_time && e->sec < start_time)
|| (end_time && e->sec > end_time))
return 0;
else {
if (tnode)
e->node = strdup(tnode);
e->type = audit_name_to_msg_type(ttype);
}
return 1;
}
// else we have a bad line
}
// else we have a bad line
}
// else we have a bad line
return 0;
}
/* Parse a \record_type field value in P->token_value to DEST.
On success, return 0.
On error, set *P->ERROR to an error string (for free()) or NULL, and return
-1. */
static int
parse_record_type_value(struct expr *dest, struct parsing *p)
{
int type;
assert(p->token == T_STRING);
type = audit_name_to_msg_type(p->token_value);
if (type < 0) {
*p->error = NULL;
asprintf(p->error, "Invalid record type `%.*s'", p->token_len,
p->token_start);
return -1;
}
dest->v.p.value.int_value = type;
dest->precomputed_value = 1;
return 0;
}
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;
}
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;
}
