static SEXP_t *oval_filter_to_sexp(struct oval_filter *filter)
{
SEXP_t *elm, *attr, *r0, *r1;
oval_filter_action_t act;
struct oval_state *ste;
char *ste_id;
act = oval_filter_get_filter_action(filter);
ste = oval_filter_get_state(filter);
ste_id = oval_state_get_id(ste);
attr = probe_attr_creat("action", r0 = SEXP_number_newu(act), NULL);
elm = probe_ent_creat1("filter",
attr,
r1 = SEXP_string_newf("%s", ste_id));
SEXP_vfree(attr, r0, r1, NULL);
return (elm);
}
int probe_main(probe_ctx *ctx, void *arg)
{
SEXP_t *path_ent, *file_ent, *inst_ent, *bh_ent, *patt_ent, *filepath_ent, *probe_in;
SEXP_t *r0;
/* char *i_val, *m_val, *s_val; */
bool val;
struct pfdata pfd;
int ret = 0;
#if defined USE_REGEX_PCRE
int errorffset = -1;
const char *error;
#elif defined USE_REGEX_POSIX
regex_t _re;
pfd.compiled_regex = &_re;
int err;
#endif
OVAL_FTS *ofts;
OVAL_FTSENT *ofts_ent;
(void)arg;
memset(&pfd, 0, sizeof(pfd));
probe_in = probe_ctx_getobject(ctx);
over = probe_obj_get_platform_schema_version(probe_in);
path_ent = probe_obj_getent(probe_in, "path", 1);
file_ent = probe_obj_getent(probe_in, "filename", 1);
inst_ent = probe_obj_getent(probe_in, "instance", 1);
patt_ent = probe_obj_getent(probe_in, "pattern", 1);
filepath_ent = probe_obj_getent(probe_in, "filepath", 1);
bh_ent = probe_obj_getent(probe_in, "behaviors", 1);
/* we want (path+filename or filepath) + instance + pattern*/
if ( ((path_ent == NULL || file_ent == NULL) && filepath_ent==NULL) ||
inst_ent==NULL ||
patt_ent==NULL) {
SEXP_free (patt_ent);
ret = PROBE_ENOELM;
goto cleanup;
}
/* get pattern from SEXP */
SEXP_t *ent_val;
ent_val = probe_ent_getval(patt_ent);
pfd.pattern = SEXP_string_cstr(ent_val);
assume_d(pfd.pattern != NULL, -1);
SEXP_free(patt_ent);
SEXP_free(ent_val);
/* wtf?
i_val = s_val = "0";
m_val = "1";
*/
/* reset filebehavior attributes if 'filepath' entity is used */
if (filepath_ent != NULL && bh_ent != NULL) {
SEXP_t *r1, *r2, *r3;
r1 = probe_ent_getattrval(bh_ent, "ignore_case");
r2 = probe_ent_getattrval(bh_ent, "multiline");
r3 = probe_ent_getattrval(bh_ent, "singleline");
r0 = probe_attr_creat("ignore_case", r1,
"multiline", r2,
"singleline", r3,
NULL);
SEXP_free(bh_ent);
bh_ent = probe_ent_creat1("behaviors", r0, NULL);
SEXP_vfree(r0, r1, r2, r3, NULL);
}
probe_tfc54behaviors_canonicalize(&bh_ent);
pfd.instance_ent = inst_ent;
pfd.ctx = ctx;
#if defined USE_REGEX_PCRE
pfd.re_opts = PCRE_UTF8;
r0 = probe_ent_getattrval(bh_ent, "ignore_case");
if (r0) {
val = SEXP_string_getb(r0);
SEXP_free(r0);
if (val)
pfd.re_opts |= PCRE_CASELESS;
}
r0 = probe_ent_getattrval(bh_ent, "multiline");
if (r0) {
val = SEXP_string_getb(r0);
SEXP_free(r0);
if (val)
pfd.re_opts |= PCRE_MULTILINE;
}
r0 = probe_ent_getattrval(bh_ent, "singleline");
if (r0) {
val = SEXP_string_getb(r0);
SEXP_free(r0);
if (val)
pfd.re_opts |= PCRE_DOTALL;
}
pfd.compiled_regex = pcre_compile(pfd.pattern, pfd.re_opts, &error,
&errorffset, NULL);
if (pfd.compiled_regex == NULL) {
SEXP_t *msg;
msg = probe_msg_creatf(OVAL_MESSAGE_LEVEL_ERROR, "pcre_compile() '%s' %s.", pfd.pattern, error);
probe_cobj_add_msg(probe_ctx_getresult(pfd.ctx), msg);
SEXP_free(msg);
probe_cobj_set_flag(probe_ctx_getresult(pfd.ctx), SYSCHAR_FLAG_ERROR);
goto cleanup;
}
#elif defined USE_REGEX_POSIX
pfd.re_opts = REG_EXTENDED | REG_NEWLINE;
r0 = probe_ent_getattrval(bh_ent, "ignore_case");
if (r0) {
val = SEXP_string_getb(r0);
SEXP_free(r0);
if (val)
pfd.re_opts |= REG_ICASE;
}
if ((err = regcomp(pfd.compiled_regex, pfd.pattern, pfd.re_opts)) != 0) {
SEXP_t *msg;
msg = probe_msg_creatf(OVAL_MESSAGE_LEVEL_ERROR, "regcomp() '%s' returned %d.", pfd.pattern, err);
probe_cobj_add_msg(probe_ctx_getresult(pfd.ctx), msg);
SEXP_free(msg);
probe_cobj_set_flag(probe_ctx_getresult(pfd.ctx), SYSCHAR_FLAG_ERROR);
goto cleanup;
}
#endif
if ((ofts = oval_fts_open(path_ent, file_ent, filepath_ent, bh_ent)) != NULL) {
while ((ofts_ent = oval_fts_read(ofts)) != NULL) {
if (ofts_ent->fts_info == FTS_F
|| ofts_ent->fts_info == FTS_SL) {
// todo: handle return code
process_file(ofts_ent->path, ofts_ent->file, &pfd);
}
oval_ftsent_free(ofts_ent);
}
oval_fts_close(ofts);
}
cleanup:
SEXP_free(file_ent);
SEXP_free(path_ent);
SEXP_free(inst_ent);
SEXP_free(bh_ent);
SEXP_free(filepath_ent);
if (pfd.pattern != NULL)
oscap_free(pfd.pattern);
#if defined USE_REGEX_PCRE
if (pfd.compiled_regex != NULL)
pcre_free(pfd.compiled_regex);
#elif defined USE_REGEX_POSIX
regfree(&_re);
#endif
return ret;
}
int oval_object_to_sexp(void *sess, const char *typestr, struct oval_syschar *syschar, SEXP_t **out_sexp)
{
unsigned int ent_cnt, varref_cnt;
int ret;
SEXP_t *obj_sexp, *elm, *varrefs, *ent_lst, *lst, *stmp;
SEXP_t *r0, *r1, *r2, *obj_attr, sm0, sm1;
struct oval_object *object;
struct oval_object_content_iterator *cit;
struct oval_behavior_iterator *bit;
struct oval_object_content *content;
struct oval_entity *entity;
char obj_name[128];
const char *obj_id;
object = oval_syschar_get_object(syschar);
/*
* Object name & attributes (id)
*/
ret = snprintf(obj_name, sizeof obj_name, "%s_object", typestr);
if (ret<0 || (unsigned int) ret > sizeof obj_name) {
dE("obj_name length too short");
return -1;
}
// even though it returns const char* it has to be freed :-(
char *obj_over = (char*)oval_schema_version_to_cstr(oval_object_get_platform_schema_version(object));
obj_id = oval_object_get_id(object);
obj_attr = probe_attr_creat("id", SEXP_string_new_r(&sm0, obj_id, strlen(obj_id)),
"oval_version", SEXP_string_new_r(&sm1, obj_over, strlen(obj_over)),
NULL);
free(obj_over);
obj_sexp = probe_obj_new(obj_name, obj_attr);
SEXP_free_r(&sm0);
SEXP_free_r(&sm1);
SEXP_free(obj_attr);
/*
* Object content
*/
ent_lst = SEXP_list_new(NULL);
varrefs = NULL;
ent_cnt = varref_cnt = 0;
cit = oval_object_get_object_contents(object);
while (oval_object_content_iterator_has_more(cit)) {
oval_check_t ochk;
oval_entity_varref_type_t vr_type;
content = oval_object_content_iterator_next(cit);
elm = NULL;
lst = ent_lst;
switch (oval_object_content_get_type(content)) {
case OVAL_OBJECTCONTENT_ENTITY:
entity = oval_object_content_get_entity(content);
elm = oval_entity_to_sexp(entity);
if (elm == NULL)
break;
ochk = oval_object_content_get_varCheck(content);
if (ochk != OVAL_CHECK_UNKNOWN) {
probe_ent_attr_add(elm, "var_check",
r0 = SEXP_number_newu_32(ochk));
SEXP_free(r0);
}
ret = 0;
vr_type = oval_entity_get_varref_type(entity);
if (vr_type == OVAL_ENTITY_VARREF_ATTRIBUTE) {
const char *var_id = oval_variable_get_id(oval_entity_get_variable(entity));
const char *field_name = oval_object_content_get_field_name(content);
dI("Object '%s' references variable '%s' in '%s' field.", obj_id, var_id, field_name);
ret = oval_varref_attr_to_sexp(sess, entity, syschar, &stmp);
if (ret == 0) {
if (varrefs == NULL)
varrefs = SEXP_list_new(NULL);
SEXP_list_add(varrefs, stmp);
SEXP_free(stmp);
// todo: don't add duplicates
++varref_cnt;
lst = obj_sexp;
++ent_cnt;
}
} else if (vr_type == OVAL_ENTITY_VARREF_ELEMENT) {
SEXP_t *val_lst;
struct oval_variable *var;
oval_datatype_t dt;
var = oval_entity_get_variable(entity);
dt = oval_entity_get_datatype(entity);
ret = oval_varref_elm_to_sexp(sess, var, dt, &val_lst, syschar);
if (ret == 0) {
SEXP_list_add(elm, val_lst);
SEXP_free(val_lst);
}
}
if (ret != 0) {
SEXP_t s_flag;
SEXP_number_newi_32_r(&s_flag, SYSCHAR_FLAG_DOES_NOT_EXIST);
probe_item_attr_add(obj_sexp, "skip_eval", &s_flag);
SEXP_free_r(&s_flag);
SEXP_free(elm);
SEXP_free(ent_lst);
if (varrefs != NULL)
SEXP_free(varrefs);
oval_object_content_iterator_free(cit);
*out_sexp = obj_sexp;
return (0);
}
break;
case OVAL_OBJECTCONTENT_SET:
elm = oval_set_to_sexp(oval_object_content_get_setobject(content));
break;
case OVAL_OBJECTCONTENT_FILTER: {
struct oval_filter *filter = oval_object_content_get_filter(content);
struct oval_state *ste = oval_filter_get_state(filter);
const char *ste_id = oval_state_get_id(ste);
oval_filter_action_t action = oval_filter_get_filter_action(filter);
const char *action_text = oval_filter_action_get_text(action);
dI("Object '%s' has a filter that %ss items conforming to state '%s'.",
obj_id, action_text, ste_id);
elm = oval_filter_to_sexp(filter);
}
break;
case OVAL_OBJECTCONTENT_UNKNOWN:
break;
}
if (elm == NULL) {
SEXP_free(obj_sexp);
SEXP_free(ent_lst);
if (varrefs != NULL)
SEXP_free(varrefs);
oval_object_content_iterator_free(cit);
return -1;
}
SEXP_list_add(lst, elm);
SEXP_free(elm);
}
if (varrefs != NULL) {
// todo: SEXP_list_push()
stmp = SEXP_list_new(r0 = SEXP_string_new("varrefs", 7),
r1 = SEXP_number_newu(varref_cnt), r2 = SEXP_number_newu(ent_cnt), NULL);
SEXP_vfree(r0, r1, r2, NULL);
r0 = SEXP_list_join(stmp, varrefs);
SEXP_list_add(obj_sexp, r0);
SEXP_vfree(stmp, varrefs, r0, NULL);
}
stmp = SEXP_list_join(obj_sexp, ent_lst);
SEXP_free(obj_sexp);
SEXP_free(ent_lst);
obj_sexp = stmp;
oval_object_content_iterator_free(cit);
/*
* Object behaviors
*/
bit = oval_object_get_behaviors(object);
if (oval_behavior_iterator_has_more(bit)) {
elm = oval_behaviors_to_sexp(bit);
SEXP_list_add(obj_sexp, elm);
SEXP_free(elm);
}
oval_behavior_iterator_free(bit);
*out_sexp = obj_sexp;
return (0);
}
