static char *parse_text_element(xmlTextReaderPtr reader, char *name)
{
char *string = NULL;
__attribute__nonnull__(reader);
__attribute__nonnull__(name);
// parse string element attributes here (like xml:lang)
while (xmlTextReaderNextNode(reader)) {
if (xmlTextReaderNodeType(reader) == XML_READER_TYPE_END_ELEMENT &&
!xmlStrcmp(xmlTextReaderConstLocalName(reader), BAD_CAST name)) {
return string;
}
switch (xmlTextReaderNodeType(reader)) {
case XML_READER_TYPE_TEXT:
string = (char *)xmlTextReaderValue(reader);
break;
default:
oscap_seterr(OSCAP_EFAMILY_OSCAP, "Unknown XML element in platform");
break;
}
}
return string;
}
struct cpe_platform *cpe_platform_parse(xmlTextReaderPtr reader)
{
struct cpe_platform *ret;
__attribute__nonnull__(reader);
// allocate platform structure here
ret = cpe_platform_new();
if (ret == NULL)
return NULL;
// parse platform attributes here
ret->id = (char *)xmlTextReaderGetAttribute(reader, ATTR_ID_STR);
if (ret->id == NULL) {
cpe_platform_free(ret);
return NULL; // if there is no "id" in platform element, return NULL
}
// skip from <platform> node to next one
xmlTextReaderNextNode(reader);
// while we have element that is not "platform", it is inside this element, otherwise it's ended
// element </platform> and we should end. If there is no one from "if" statement cases, we are parsing
// attribute or text ,.. and we can continue to next node.
while (xmlStrcmp(xmlTextReaderConstLocalName(reader), TAG_PLATFORM_STR) != 0) {
if (!xmlStrcmp(xmlTextReaderConstLocalName(reader), ATTR_TITLE_STR) &&
xmlTextReaderNodeType(reader) == XML_READER_TYPE_ELEMENT) {
oscap_list_add(ret->titles, oscap_text_new_parse(OSCAP_TEXT_TRAITS_PLAIN, reader));
} else
if (!xmlStrcmp(xmlTextReaderConstLocalName(reader), TAG_REMARK_STR) &&
xmlTextReaderNodeType(reader) == XML_READER_TYPE_ELEMENT) {
ret->remark = parse_text_element(reader, (char *)TAG_REMARK_STR); // TODO: 0-n remarks !
} else
if (!xmlStrcmp(xmlTextReaderConstLocalName(reader), TAG_LOGICAL_TEST_STR) &&
xmlTextReaderNodeType(reader) == XML_READER_TYPE_ELEMENT) {
/* Maybe we shall not allocate this in constructor? */
cpe_testexpr_free(ret->expr);
ret->expr = cpe_testexpr_parse(reader);
} else if (xmlTextReaderNodeType(reader) == XML_READER_TYPE_ELEMENT)
oscap_seterr(OSCAP_EFAMILY_OSCAP, "Unknown XML element in platform");
// get the next node
xmlTextReaderNextNode(reader);
}
return ret;
}
static struct cpe_ext_deprecation *cpe_ext_deprecation_parse(xmlTextReaderPtr reader)
{
__attribute__nonnull__(reader);
if (xmlStrcmp(xmlTextReaderConstLocalName(reader), BAD_CAST TAG_CPE_EXT_DEPRECATION_STR) != 0 ||
xmlTextReaderNodeType(reader) != 1) {
oscap_seterr(OSCAP_EFAMILY_OSCAP, "Found '%s' node when expecting: '%s'!",
xmlTextReaderConstLocalName(reader), TAG_CPE_EXT_DEPRECATION_STR);
}
const xmlChar* nsuri = xmlTextReaderConstNamespaceUri(reader);
if (nsuri && xmlStrcmp(nsuri, BAD_CAST XMLNS_CPE2D3_EXTENSION) != 0) {
oscap_seterr(OSCAP_EFAMILY_OSCAP, "Found '%s' namespace when expecting: '%s'!",
nsuri, XMLNS_CPE2D3_EXTENSION);
return NULL;
}
struct cpe_ext_deprecation *deprecation = cpe_ext_deprecation_new();
deprecation->date = (char *) xmlTextReaderGetAttribute(reader, BAD_CAST ATTR_DATE_STR);
if (xmlTextReaderIsEmptyElement(reader) == 0) { // the element contains child nodes
xmlTextReaderNextNode(reader);
while (xmlStrcmp(xmlTextReaderConstLocalName(reader), BAD_CAST TAG_CPE_EXT_DEPRECATION_STR) != 0) {
if (xmlTextReaderNodeType(reader) != XML_READER_TYPE_ELEMENT) {
xmlTextReaderNextNode(reader);
continue;
}
if (xmlStrcmp(xmlTextReaderConstLocalName(reader), BAD_CAST TAG_CPE_EXT_DEPRECATEDBY_STR) == 0) {
struct cpe_ext_deprecatedby *deprecatedby = cpe_ext_deprecatedby_parse(reader);
if (deprecatedby == NULL) {
cpe_ext_deprecation_free(deprecation);
return NULL;
}
oscap_list_add(deprecation->deprecatedbys, deprecatedby);
}
else {
oscap_seterr(OSCAP_EFAMILY_OSCAP, "Unexpected element within deprecation element: '%s'",
xmlTextReaderConstLocalName(reader));
cpe_ext_deprecation_free(deprecation);
return NULL;
}
xmlTextReaderNextNode(reader);
}
}
return deprecation;
}
struct cpe_lang_model *cpe_lang_model_import_source(struct oscap_source *source)
{
xmlTextReaderPtr reader = oscap_source_get_xmlTextReader(source);
struct cpe_lang_model *ret = NULL;
if (reader != NULL) {
xmlTextReaderNextNode(reader);
ret = cpe_lang_model_parse(reader);
if (ret != NULL) {
cpe_lang_model_set_origin_file(ret, oscap_source_readable_origin(source));
}
}
xmlFreeTextReader(reader);
return ret;
}
struct cpe_testexpr *cpe_testexpr_parse(xmlTextReaderPtr reader)
{
xmlChar *temp = NULL;
size_t elem_cnt = 0;
struct cpe_testexpr *ret = NULL;
__attribute__nonnull__(reader);
// allocation
ret = cpe_testexpr_new();
if (ret == NULL)
return NULL;
// it's fact-ref only, fill the structure and return it
if (!xmlStrcmp(xmlTextReaderConstLocalName(reader), TAG_FACT_REF_STR) &&
xmlTextReaderNodeType(reader) == XML_READER_TYPE_ELEMENT) {
ret->oper = CPE_LANG_OPER_MATCH;
temp = xmlTextReaderGetAttribute(reader, ATTR_NAME_STR);
ret->meta.cpe = cpe_name_new((char *)temp);
xmlFree(temp);
return ret;
// it's check-fact-ref only, fill the structure and return it
} else if (!xmlStrcmp(xmlTextReaderConstLocalName(reader), TAG_CHECK_FACT_REF_STR) &&
xmlTextReaderNodeType(reader) == XML_READER_TYPE_ELEMENT) {
ret->oper = CPE_LANG_OPER_CHECK;
ret->meta.check.system = (char*)xmlTextReaderGetAttribute(reader, ATTR_SYSTEM_STR);
ret->meta.check.href = (char*)xmlTextReaderGetAttribute(reader, ATTR_HREF_STR);
ret->meta.check.id = (char*)xmlTextReaderGetAttribute(reader, ATTR_ID_REF_STR);
return ret;
} else if (!xmlStrcmp(xmlTextReaderConstLocalName(reader), TAG_LOGICAL_TEST_STR) &&
xmlTextReaderNodeType(reader) == XML_READER_TYPE_ELEMENT) {
// it's logical-test, fill the structure and go to next node
temp = xmlTextReaderGetAttribute(reader, ATTR_OPERATOR_STR);
if (xmlStrcasecmp(temp, VAL_AND_STR) == 0)
ret->oper = CPE_LANG_OPER_AND;
else if (xmlStrcasecmp(temp, VAL_OR_STR) == 0)
ret->oper = CPE_LANG_OPER_OR;
else {
// unknown operator problem
xmlFree(temp);
oscap_free(ret);
return NULL;
}
xmlFree(temp);
ret->meta.expr = oscap_list_new(); // initialise a list of subexpressions
temp = xmlTextReaderGetAttribute(reader, ATTR_NEGATE_STR);
if (temp && xmlStrcasecmp(temp, VAL_TRUE_STR) == 0)
ret->oper |= CPE_LANG_OPER_NOT;
xmlFree(temp);
} else if (xmlTextReaderNodeType(reader) == XML_READER_TYPE_ELEMENT)
oscap_seterr(OSCAP_EFAMILY_OSCAP, "Unknown XML element in test expression");
// go to next node
// skip to next node
xmlTextReaderNextNode(reader);
int depth = xmlTextReaderDepth(reader);
//printf("[%d] logical-test\n", depth);
// while it's not 'logical-test' or it's not ended element ..
//while (!xmlStrcmp(xmlTextReaderConstLocalName(reader), TAG_FACT_REF_STR) ||
// !xmlStrcmp(xmlTextReaderConstLocalName(reader), TAG_LOGICAL_TEST_STR)) {
while (xmlTextReaderDepth(reader) >= depth) {
//printf("[%d:%d] logical-test::%s\n", depth, xmlTextReaderDepth(reader), xmlTextReaderConstLocalName(reader));
if (xmlTextReaderNodeType(reader) != XML_READER_TYPE_ELEMENT) {
xmlTextReaderNextNode(reader);
continue;
}
elem_cnt++;
// We assume that the expression is a logical one (meaning that it
// can have subexpressions).
// TODO: Enforce that assumption and don't rely on just validation.
// .. and the next node is logical-test element, we need recursive call
if (!xmlStrcmp(xmlTextReaderConstLocalName(reader), TAG_LOGICAL_TEST_STR) &&
xmlTextReaderNodeType(reader) == XML_READER_TYPE_ELEMENT) {
// ret->meta.expr[elem_cnt - 1] = *(cpe_testexpr_parse(reader));
oscap_list_add(ret->meta.expr, cpe_testexpr_parse(reader));
if (xmlTextReaderDepth(reader) < depth) {
return ret;
} else if (xmlTextReaderDepth(reader) == depth) continue;
}
else if (!xmlStrcmp(xmlTextReaderConstLocalName(reader), TAG_FACT_REF_STR) &&
xmlTextReaderNodeType(reader) == XML_READER_TYPE_ELEMENT) {
// fill the structure
struct cpe_testexpr *subexpr = cpe_testexpr_new();
subexpr->oper = CPE_LANG_OPER_MATCH;
temp = xmlTextReaderGetAttribute(reader, ATTR_NAME_STR);
subexpr->meta.cpe = cpe_name_new((char *)temp);
//printf("FACT-REF: %s\n", temp);
xmlFree(temp);
oscap_list_add(ret->meta.expr, subexpr);
} else if (!xmlStrcmp(xmlTextReaderConstLocalName(reader), TAG_CHECK_FACT_REF_STR) &&
xmlTextReaderNodeType(reader) == XML_READER_TYPE_ELEMENT) {
struct cpe_testexpr *subexpr = cpe_testexpr_new();
subexpr->oper = CPE_LANG_OPER_CHECK;
subexpr->meta.check.system = (char*)xmlTextReaderGetAttribute(reader, ATTR_SYSTEM_STR);
subexpr->meta.check.href = (char*)xmlTextReaderGetAttribute(reader, ATTR_HREF_STR);
subexpr->meta.check.id = (char*)xmlTextReaderGetAttribute(reader, ATTR_ID_REF_STR);
oscap_list_add(ret->meta.expr, subexpr);
} else if (xmlTextReaderNodeType(reader) == XML_READER_TYPE_ELEMENT) {
oscap_seterr(OSCAP_EFAMILY_OSCAP, "Unknown XML element in test expression");
}
xmlTextReaderNextNode(reader);
}
//ret->meta.expr[elem_cnt].oper = CPE_LANG_OPER_HALT;
return ret;
}
