END_TEST
START_TEST(test_osgetelements)
{
char xml_file_name[256];
create_xml_file("<root><child1/><child2/></root>", xml_file_name, 256);
OS_XML xml;
ck_assert_int_eq(OS_ReadXML(xml_file_name, &xml), 0);
ck_assert_int_eq(OS_ApplyVariables(&xml), 0);
const char *xml_path[] = { "root", NULL };
char **content1, **content2;
ck_assert_ptr_ne(content1 = OS_GetElements(&xml, xml_path), NULL);
ck_assert_str_eq(content1[0], "child1");
ck_assert_str_eq(content1[1], "child2");
ck_assert_ptr_eq(content1[2], NULL);
ck_assert_ptr_ne(content2 = OS_GetElements(&xml, NULL), NULL);
ck_assert_str_eq(content2[0], "root");
ck_assert_ptr_eq(content2[1], NULL);
const char *xml_path2[] = { NULL };
ck_assert_ptr_eq(OS_GetElements(&xml, xml_path2), NULL);
int i = 0;
while (content1[i]) {
free(content1[i++]);
}
free(content1);
i = 0;
while (content2[i]) {
free(content2[i++]);
}
free(content2);
OS_ClearXML(&xml);
unlink(xml_file_name);
}
END_TEST
START_TEST(test_osgetattributecontent)
{
char xml_file_name[256];
create_xml_file("<root attr=\"value\" attr2=\"value1\"></root>", xml_file_name, 256);
OS_XML xml;
ck_assert_int_eq(OS_ReadXML(xml_file_name, &xml), 0);
ck_assert_int_eq(OS_ApplyVariables(&xml), 0);
const char *xml_path1[] = { "root", NULL };
const char *xml_path2[] = { NULL };
char *content1, *content2, *content3, *content4;
ck_assert_str_eq(content1 = OS_GetAttributeContent(&xml, xml_path1, "attr"), "value");
ck_assert_str_eq(content2 = OS_GetAttributeContent(&xml, xml_path1, "attr2"), "value1");
ck_assert_str_eq(content3 = OS_GetAttributeContent(&xml, xml_path1, "attr3"), "");
ck_assert_str_eq(content4 = OS_GetAttributeContent(&xml, xml_path1, NULL), "");
ck_assert_ptr_eq(OS_GetAttributeContent(&xml, xml_path2, NULL), NULL);
free(content1);
free(content2);
free(content3);
free(content4);
OS_ClearXML(&xml);
unlink(xml_file_name);
}
END_TEST
//TODO
/*START_TEST(test_unknownvariable)
{
char xml_file_name[256];
create_xml_file("<root>$var</root>", xml_file_name, 256);
OS_XML xml;
ck_assert_int_eq(OS_ReadXML(xml_file_name, &xml), 0);
ck_assert_int_ne(OS_ApplyVariables(&xml), 0);
ck_assert_str_eq(xml.err, "XML_ERR: Unknown variable: var");
ck_assert_int_eq(xml.err_line, 0);
OS_ClearXML(&xml);
unlink(xml_file_name);
}
END_TEST*/
START_TEST(test_oselementsexists)
{
char xml_file_name[256];
create_xml_file("<root></root><root1/><root/>", xml_file_name, 256);
OS_XML xml;
ck_assert_int_eq(OS_ReadXML(xml_file_name, &xml), 0);
ck_assert_int_eq(OS_ApplyVariables(&xml), 0);
ck_assert_int_eq(OS_RootElementExist(&xml, "root"), 2);
ck_assert_int_eq(OS_RootElementExist(&xml, "root1"), 1);
ck_assert_int_eq(OS_RootElementExist(&xml, "root2"), 0);
OS_ClearXML(&xml);
unlink(xml_file_name);
}
END_TEST
START_TEST(test_unknownvariable1)
{
char xml_file_name[256];
create_xml_file("<var name=\"test\">content</var><root>$var</root>", xml_file_name, 256);
OS_XML xml;
ck_assert_int_eq(OS_ReadXML(xml_file_name, &xml), 0);
ck_assert_int_ne(OS_ApplyVariables(&xml), 0);
ck_assert_str_eq(xml.err, "XMLERR: Unknown variable: 'var'.");
ck_assert_int_eq(xml.err_line, 1);
OS_ClearXML(&xml);
unlink(xml_file_name);
}
END_TEST
START_TEST(test_invalidvariablename)
{
char xml_file_name[256];
create_xml_file("<var test=\"test\"></var>", xml_file_name, 256);
OS_XML xml;
ck_assert_int_eq(OS_ReadXML(xml_file_name, &xml), 0);
ck_assert_int_ne(OS_ApplyVariables(&xml), 0);
ck_assert_str_eq(xml.err, "XMLERR: Only \"name\" is allowed as an attribute for a variable.");
ck_assert_int_eq(xml.err_line, 1);
OS_ClearXML(&xml);
unlink(xml_file_name);
}
END_TEST
START_TEST(test_linecounter)
{
char xml_file_name[256];
create_xml_file("<root1/>\n<root2/>\n<root3/>" , xml_file_name, 256);
OS_XML xml;
XML_NODE node;
ck_assert_int_eq(OS_ReadXML(xml_file_name, &xml), 0);
ck_assert_int_eq(OS_ApplyVariables(&xml), 0);
ck_assert_ptr_ne(node = OS_GetElementsbyNode(&xml, NULL), NULL);
ck_assert_int_eq(xml.ln[0], 1);
ck_assert_int_eq(xml.ln[1], 2);
ck_assert_int_eq(xml.ln[2], 3);
OS_ClearNode(node);
OS_ClearXML(&xml);
unlink(xml_file_name);
}
END_TEST
static void assert_ox_xml_write_eq(const char *xml_str_old, const char *xml_str_new, const char **xml_path, const char *oldval, const char *newval)
{
char xml_in_file_name[256];
create_xml_file(xml_str_old, xml_in_file_name, 256);
char xml_out_file_name[256];
create_xml_file("", xml_out_file_name, 256);
ck_assert_int_eq(OS_WriteXML(xml_in_file_name, xml_out_file_name, xml_path, oldval, newval), 0);
OS_XML xml;
ck_assert_int_eq(OS_ReadXML(xml_out_file_name, &xml), 0);
ck_assert_int_eq(OS_ApplyVariables(&xml), 0);
assert_os_xml_eq_str(&xml, xml_str_new);
OS_ClearXML(&xml);
unlink(xml_in_file_name);
unlink(xml_out_file_name);
}
END_TEST
START_TEST(test_invalidvariable2)
{
char xml_file_name[256];
char overflow_string[XML_VARIABLE_MAXSIZE + 10];
memset(overflow_string, 'c', XML_VARIABLE_MAXSIZE + 9);
overflow_string[XML_VARIABLE_MAXSIZE + 9] = '\0';
char xml_string[3 * XML_VARIABLE_MAXSIZE];
snprintf(xml_string, 3 * XML_VARIABLE_MAXSIZE - 1, "<var name=\"%s\">test</var><test>$%s</test>", overflow_string, overflow_string);
create_xml_file(xml_string, xml_file_name, 256);
OS_XML xml;
ck_assert_int_eq(OS_ReadXML(xml_file_name, &xml), 0);
ck_assert_int_ne(OS_ApplyVariables(&xml), 0);
ck_assert_str_eq(xml.err, "XMLERR: Invalid variable name size.");
ck_assert_int_eq(xml.err_line, 1);
OS_ClearXML(&xml);
unlink(xml_file_name);
}
END_TEST
START_TEST(test_osgetonecontentforelement)
{
char xml_file_name[256];
create_xml_file("<root><child>test</child><child>test2</child><child2>test</child2></root>", xml_file_name, 256);
OS_XML xml;
ck_assert_int_eq(OS_ReadXML(xml_file_name, &xml), 0);
ck_assert_int_eq(OS_ApplyVariables(&xml), 0);
const char *xml_path1[] = { "root", "child", NULL };
const char *xml_path2[] = { "root", "child2", NULL };
const char *xml_path3[] = { "root", "child3", NULL };
char *content1, *content2;
ck_assert_str_eq(content1 = OS_GetOneContentforElement(&xml, xml_path1), "test");
ck_assert_str_eq(content2 = OS_GetOneContentforElement(&xml, xml_path2), "test");
ck_assert_ptr_eq(OS_GetOneContentforElement(&xml, xml_path3), NULL);
free(content1);
free(content2);
OS_ClearXML(&xml);
unlink(xml_file_name);
}
END_TEST
START_TEST(test_osgetelementcontent)
{
char xml_file_name[256];
create_xml_file("<root>value</root>", xml_file_name, 256);
OS_XML xml;
ck_assert_int_eq(OS_ReadXML(xml_file_name, &xml), 0);
ck_assert_int_eq(OS_ApplyVariables(&xml), 0);
const char *xml_path[] = { "root", NULL };
char **content;
ck_assert_ptr_ne(content = OS_GetElementContent(&xml, xml_path), NULL);
ck_assert_str_eq(content[0], "value");
ck_assert_ptr_eq(content[1], NULL);
int i = 0;
while (content[i]) {
free(content[i++]);
}
free(content);
OS_ClearXML(&xml);
unlink(xml_file_name);
}
END_TEST
START_TEST(test_osgetattributes)
{
char xml_file_name[256];
create_xml_file("<root attr1=\"1\" attr2=\"2\"></root>", xml_file_name, 256);
OS_XML xml;
ck_assert_int_eq(OS_ReadXML(xml_file_name, &xml), 0);
ck_assert_int_eq(OS_ApplyVariables(&xml), 0);
const char *xml_path[] = { "root", NULL };
char **content;
ck_assert_ptr_ne(content = OS_GetAttributes(&xml, xml_path), NULL);
ck_assert_str_eq(content[0], "attr1");
ck_assert_str_eq(content[1], "attr2");
ck_assert_ptr_eq(content[2], NULL);
int i = 0;
while (content[i]) {
free(content[i++]);
}
free(content);
OS_ClearXML(&xml);
unlink(xml_file_name);
}
int ReadDecodeXML(const char *file)
{
OS_XML xml;
XML_NODE node = NULL;
/* XML variables */
/* These are the available options for the rule configuration */
const char *xml_plugindecoder = "plugin_decoder";
const char *xml_decoder = "decoder";
const char *xml_decoder_name = "name";
const char *xml_decoder_status = "status";
const char *xml_usename = "use_own_name";
const char *xml_parent = "parent";
const char *xml_program_name = "program_name";
const char *xml_prematch = "prematch";
const char *xml_regex = "regex";
const char *xml_order = "order";
const char *xml_type = "type";
const char *xml_fts = "fts";
const char *xml_ftscomment = "ftscomment";
const char *xml_accumulate = "accumulate";
int i = 0;
OSDecoderInfo *NULL_Decoder_tmp = NULL;
/* Read the XML */
if ((i = OS_ReadXML(file, &xml)) < 0) {
if ((i == -2) && (strcmp(file, XML_LDECODER) == 0)) {
return (-2);
}
merror(XML_ERROR, ARGV0, file, xml.err, xml.err_line);
return (0);
}
/* Apply any variables found */
if (OS_ApplyVariables(&xml) != 0) {
merror(XML_ERROR_VAR, ARGV0, file, xml.err);
return (0);
}
/* Get the root elements */
node = OS_GetElementsbyNode(&xml, NULL);
if (!node) {
if (strcmp(file, XML_LDECODER) != 0) {
merror(XML_ELEMNULL, ARGV0);
return (0);
}
return (-2);
}
/* Zero NULL_decoder */
if (!NULL_Decoder) {
os_calloc(1, sizeof(OSDecoderInfo), NULL_Decoder_tmp);
NULL_Decoder_tmp->id = 0;
NULL_Decoder_tmp->type = SYSLOG;
NULL_Decoder_tmp->name = NULL;
NULL_Decoder_tmp->fts = 0;
NULL_Decoder = NULL_Decoder_tmp;
}
i = 0;
while (node[i]) {
XML_NODE elements = NULL;
OSDecoderInfo *pi;
int j = 0;
char *regex;
char *prematch;
char *p_name;
if (!node[i]->element ||
strcasecmp(node[i]->element, xml_decoder) != 0) {
merror(XML_INVELEM, ARGV0, node[i]->element);
return (0);
}
/* Get name */
if ((!node[i]->attributes) || (!node[i]->values) ||
(!node[i]->values[0]) || (!node[i]->attributes[0]) ||
(strcasecmp(node[i]->attributes[0], xml_decoder_name) != 0)) {
merror(XML_INVELEM, ARGV0, node[i]->element);
return (0);
}
/* Check for additional entries */
if (node[i]->attributes[1] && node[i]->values[1]) {
if (strcasecmp(node[i]->attributes[0], xml_decoder_status) != 0) {
merror(XML_INVELEM, ARGV0, node[i]->element);
return (0);
}
if (node[i]->attributes[2]) {
merror(XML_INVELEM, ARGV0, node[i]->element);
return (0);
}
}
/* Get decoder options */
elements = OS_GetElementsbyNode(&xml, node[i]);
if (elements == NULL) {
merror(XML_ELEMNULL, ARGV0);
return (0);
}
/* Create the OSDecoderInfo */
pi = (OSDecoderInfo *)calloc(1, sizeof(OSDecoderInfo));
if (pi == NULL) {
merror(MEM_ERROR, ARGV0, errno, strerror(errno));
return (0);
}
/* Default values to the list */
pi->parent = NULL;
pi->id = 0;
pi->name = strdup(node[i]->values[0]);
pi->order = NULL;
pi->plugindecoder = NULL;
pi->fts = 0;
pi->accumulate = 0;
pi->type = SYSLOG;
pi->prematch = NULL;
pi->program_name = NULL;
pi->regex = NULL;
pi->use_own_name = 0;
pi->get_next = 0;
pi->regex_offset = 0;
pi->prematch_offset = 0;
regex = NULL;
prematch = NULL;
p_name = NULL;
/* Check if strdup worked */
if (!pi->name) {
merror(MEM_ERROR, ARGV0, errno, strerror(errno));
return (0);
}
/* Add decoder */
if (!addDecoder2list(pi->name)) {
merror(MEM_ERROR, ARGV0, errno, strerror(errno));
free(pi);
return (0);
}
/* Loop over all the elements */
while (elements[j]) {
if (!elements[j]->element) {
merror(XML_ELEMNULL, ARGV0);
return (0);
} else if (!elements[j]->content) {
merror(XML_VALUENULL, ARGV0, elements[j]->element);
return (0);
}
/* Check if it is a child of a rule */
else if (strcasecmp(elements[j]->element, xml_parent) == 0) {
pi->parent = _loadmemory(pi->parent, elements[j]->content);
}
/* Get the regex */
else if (strcasecmp(elements[j]->element, xml_regex) == 0) {
int r_offset;
r_offset = ReadDecodeAttrs(elements[j]->attributes,
elements[j]->values);
if (r_offset & AFTER_ERROR) {
merror(DEC_REGEX_ERROR, ARGV0, pi->name);
return (0);
}
/* Only the first regex entry may have an offset */
if (regex && r_offset) {
merror(DUP_REGEX, ARGV0, pi->name);
merror(DEC_REGEX_ERROR, ARGV0, pi->name);
return (0);
}
/* regex offset */
if (r_offset) {
pi->regex_offset = r_offset;
}
/* Assign regex */
regex =
_loadmemory(regex,
elements[j]->content);
}
/* Get the pre match */
else if (strcasecmp(elements[j]->element, xml_prematch) == 0) {
int r_offset;
r_offset = ReadDecodeAttrs(
elements[j]->attributes,
elements[j]->values);
if (r_offset & AFTER_ERROR) {
ErrorExit(DEC_REGEX_ERROR, ARGV0, pi->name);
}
/* Only the first prematch entry may have an offset */
if (prematch && r_offset) {
merror(DUP_REGEX, ARGV0, pi->name);
ErrorExit(DEC_REGEX_ERROR, ARGV0, pi->name);
}
if (r_offset) {
pi->prematch_offset = r_offset;
}
prematch =
_loadmemory(prematch,
elements[j]->content);
}
/* Get program name */
else if (strcasecmp(elements[j]->element, xml_program_name) == 0) {
p_name = _loadmemory(p_name, elements[j]->content);
}
/* Get the FTS comment */
else if (strcasecmp(elements[j]->element, xml_ftscomment) == 0) {
}
else if (strcasecmp(elements[j]->element, xml_usename) == 0) {
if (strcmp(elements[j]->content, "true") == 0) {
pi->use_own_name = 1;
}
}
else if (strcasecmp(elements[j]->element, xml_plugindecoder) == 0) {
int ed_c = 0;
for (ed_c = 0; plugin_decoders[ed_c] != NULL; ed_c++) {
if (strcmp(plugin_decoders[ed_c],
elements[j]->content) == 0) {
/* Initialize plugin */
void (*dec_init)(void) = (void (*)(void)) plugin_decoders_init[ed_c];
dec_init();
pi->plugindecoder = (void (*)(void *)) plugin_decoders_exec[ed_c];
break;
}
}
/* Decoder not found */
if (pi->plugindecoder == NULL) {
merror(INV_DECOPTION, ARGV0, elements[j]->element,
elements[j]->content);
return (0);
}
}
/* Get the type */
else if (strcmp(elements[j]->element, xml_type) == 0) {
if (strcmp(elements[j]->content, "firewall") == 0) {
pi->type = FIREWALL;
} else if (strcmp(elements[j]->content, "ids") == 0) {
pi->type = IDS;
} else if (strcmp(elements[j]->content, "web-log") == 0) {
pi->type = WEBLOG;
} else if (strcmp(elements[j]->content, "syslog") == 0) {
pi->type = SYSLOG;
} else if (strcmp(elements[j]->content, "squid") == 0) {
pi->type = SQUID;
} else if (strcmp(elements[j]->content, "windows") == 0) {
pi->type = DECODER_WINDOWS;
} else if (strcmp(elements[j]->content, "host-information") == 0) {
pi->type = HOST_INFO;
} else if (strcmp(elements[j]->content, "ossec") == 0) {
pi->type = OSSEC_RL;
} else {
merror("%s: Invalid decoder type '%s'.",
ARGV0, elements[j]->content);
return (0);
}
}
/* Get the order */
else if (strcasecmp(elements[j]->element, xml_order) == 0) {
char **norder, **s_norder;
int order_int = 0;
/* Maximum number is 8 for the order */
norder = OS_StrBreak(',', elements[j]->content, 8);
s_norder = norder;
os_calloc(8, sizeof(void *), pi->order);
/* Initialize the function pointers */
while (order_int < 8) {
pi->order[order_int] = NULL;
order_int++;
}
order_int = 0;
/* Check the values from the order */
while (*norder) {
if (strstr(*norder, "dstuser") != NULL) {
pi->order[order_int] = (void (*)(void *, char *)) DstUser_FP;
} else if (strstr(*norder, "srcuser") != NULL) {
pi->order[order_int] = (void (*)(void *, char *)) SrcUser_FP;
}
/* User is an alias to dstuser */
else if (strstr(*norder, "user") != NULL) {
pi->order[order_int] = (void (*)(void *, char *)) DstUser_FP;
} else if (strstr(*norder, "srcip") != NULL) {
pi->order[order_int] = (void (*)(void *, char *)) SrcIP_FP;
} else if (strstr(*norder, "dstip") != NULL) {
pi->order[order_int] = (void (*)(void *, char *)) DstIP_FP;
} else if (strstr(*norder, "srcport") != NULL) {
pi->order[order_int] = (void (*)(void *, char *)) SrcPort_FP;
} else if (strstr(*norder, "dstport") != NULL) {
pi->order[order_int] = (void (*)(void *, char *)) DstPort_FP;
} else if (strstr(*norder, "protocol") != NULL) {
pi->order[order_int] = (void (*)(void *, char *)) Protocol_FP;
} else if (strstr(*norder, "action") != NULL) {
pi->order[order_int] = (void (*)(void *, char *)) Action_FP;
} else if (strstr(*norder, "id") != NULL) {
pi->order[order_int] = (void (*)(void *, char *)) ID_FP;
} else if (strstr(*norder, "url") != NULL) {
pi->order[order_int] = (void (*)(void *, char *)) Url_FP;
} else if (strstr(*norder, "data") != NULL) {
pi->order[order_int] = (void (*)(void *, char *)) Data_FP;
} else if (strstr(*norder, "extra_data") != NULL) {
pi->order[order_int] = (void (*)(void *, char *)) Data_FP;
} else if (strstr(*norder, "status") != NULL) {
pi->order[order_int] = (void (*)(void *, char *)) Status_FP;
} else if (strstr(*norder, "system_name") != NULL) {
pi->order[order_int] = (void (*)(void *, char *)) SystemName_FP;
} else if (strstr(*norder, "filename") != NULL) {
pi->order[order_int] = (void (*)(void *, char *)) FileName_FP;
} else {
ErrorExit("decode-xml: Wrong field '%s' in the order"
" of decoder '%s'", *norder, pi->name);
}
free(*norder);
norder++;
order_int++;
}
free(s_norder);
}
else if (strcasecmp(elements[j]->element, xml_accumulate) == 0) {
/* Enable Accumulator */
pi->accumulate = 1;
}
/* Get the FTS order */
else if (strcasecmp(elements[j]->element, xml_fts) == 0) {
char **norder;
char **s_norder;
/* Maximum number is 8 for the FTS */
norder = OS_StrBreak(',', elements[j]->content, 8);
if (norder == NULL) {
ErrorExit(MEM_ERROR, ARGV0, errno, strerror(errno));
}
/* Save the initial point to free later */
s_norder = norder;
/* Check the values from the FTS */
while (*norder) {
if (strstr(*norder, "dstuser") != NULL) {
pi->fts |= FTS_DSTUSER;
}
if (strstr(*norder, "user") != NULL) {
pi->fts |= FTS_DSTUSER;
} else if (strstr(*norder, "srcuser") != NULL) {
pi->fts |= FTS_SRCUSER;
} else if (strstr(*norder, "srcip") != NULL) {
pi->fts |= FTS_SRCIP;
} else if (strstr(*norder, "dstip") != NULL) {
pi->fts |= FTS_DSTIP;
} else if (strstr(*norder, "id") != NULL) {
pi->fts |= FTS_ID;
} else if (strstr(*norder, "location") != NULL) {
pi->fts |= FTS_LOCATION;
} else if (strstr(*norder, "data") != NULL) {
pi->fts |= FTS_DATA;
} else if (strstr(*norder, "extra_data") != NULL) {
pi->fts |= FTS_DATA;
} else if (strstr(*norder, "system_name") != NULL) {
pi->fts |= FTS_SYSTEMNAME;
} else if (strstr(*norder, "name") != NULL) {
pi->fts |= FTS_NAME;
} else {
ErrorExit("decode-xml: Wrong field '%s' in the fts"
" decoder '%s'", *norder, pi->name);
}
free(*norder);
norder++;
}
/* Clear memory here */
free(s_norder);
} else {
merror("%s: Invalid element '%s' for "
"decoder '%s'",
ARGV0,
elements[j]->element,
node[i]->element);
return (0);
}
/* NEXT */
j++;
} /* while(elements[j]) */
OS_ClearNode(elements);
/* Prematch must be set */
if (!prematch && !pi->parent && !p_name) {
merror(DECODE_NOPRE, ARGV0, pi->name);
merror(DEC_REGEX_ERROR, ARGV0, pi->name);
return (0);
}
/* If pi->regex is not set, fts must not be set too */
if ((!regex && (pi->fts || pi->order)) || (regex && !pi->order)) {
merror(DEC_REGEX_ERROR, ARGV0, pi->name);
return (0);
}
/* For the offsets */
if ((pi->regex_offset & AFTER_PARENT) && !pi->parent) {
merror(INV_OFFSET, ARGV0, "after_parent");
merror(DEC_REGEX_ERROR, ARGV0, pi->name);
return (0);
}
if (pi->regex_offset & AFTER_PREMATCH) {
/* If after_prematch is set, but rule have
* no parent, set AFTER_PARENT and unset
* pre_match.
*/
if (!pi->parent) {
pi->regex_offset = 0;
pi->regex_offset |= AFTER_PARENT;
} else if (!prematch) {
merror(INV_OFFSET, ARGV0, "after_prematch");
merror(DEC_REGEX_ERROR, ARGV0, pi->name);
return (0);
}
}
/* For the after_regex offset */
if (pi->regex_offset & AFTER_PREVREGEX) {
if (!pi->parent || !regex) {
merror(INV_OFFSET, ARGV0, "after_regex");
merror(DEC_REGEX_ERROR, ARGV0, pi->name);
return (0);
}
}
/* Check the prematch offset */
if (pi->prematch_offset) {
/* Only the after parent is allowed */
if (pi->prematch_offset & AFTER_PARENT) {
if (!pi->parent) {
merror(INV_OFFSET, ARGV0, "after_parent");
merror(DEC_REGEX_ERROR, ARGV0, pi->name);
return (0);
}
} else {
merror(DEC_REGEX_ERROR, ARGV0, pi->name);
return (0);
}
}
/* Compile the regex/prematch */
if (prematch) {
os_calloc(1, sizeof(OSRegex), pi->prematch);
if (!OSRegex_Compile(prematch, pi->prematch, 0)) {
merror(REGEX_COMPILE, ARGV0, prematch, pi->prematch->error);
return (0);
}
free(prematch);
}
/* Compile the p_name */
if (p_name) {
os_calloc(1, sizeof(OSMatch), pi->program_name);
if (!OSMatch_Compile(p_name, pi->program_name, 0)) {
merror(REGEX_COMPILE, ARGV0, p_name, pi->program_name->error);
return (0);
}
free(p_name);
}
/* We may not have the pi->regex */
if (regex) {
os_calloc(1, sizeof(OSRegex), pi->regex);
if (!OSRegex_Compile(regex, pi->regex, OS_RETURN_SUBSTRING)) {
merror(REGEX_COMPILE, ARGV0, regex, pi->regex->error);
return (0);
}
/* We must have the sub_strings to retrieve the nodes */
if (!pi->regex->sub_strings) {
merror(REGEX_SUBS, ARGV0, regex);
return (0);
}
free(regex);
}
/* Validate arguments */
if (pi->plugindecoder && (pi->regex || pi->order)) {
merror(DECODE_ADD, ARGV0, pi->name);
return (0);
}
/* Add osdecoder to the list */
if (!OS_AddOSDecoder(pi)) {
merror(DECODER_ERROR, ARGV0);
return (0);
}
i++;
} /* while (node[i]) */
/* Clean node and XML structures */
OS_ClearNode(node);
OS_ClearXML(&xml);
return (1);
}
/* Rules_OP_ReadRules, v0.3, 2005/03/21
* Read the log rules.
* v0.3: Fixed many memory problems.
*/
int OS_ReadXMLRules(char *rulefile,
void *(*ruleact_function)(RuleInfo *rule, void *data),
void *data)
{
OS_XML xml;
XML_NODE node = NULL;
/** XML variables **/
/* These are the available options for the rule configuration */
char *xml_group = "group";
char *xml_rule = "rule";
char *xml_regex = "regex";
char *xml_match = "match";
char *xml_decoded = "decoded_as";
char *xml_category = "category";
char *xml_cve = "cve";
char *xml_info = "info";
char *xml_day_time = "time";
char *xml_week_day = "weekday";
char *xml_comment = "description";
char *xml_ignore = "ignore";
char *xml_check_if_ignored = "check_if_ignored";
char *xml_srcip = "srcip";
char *xml_srcport = "srcport";
char *xml_dstip = "dstip";
char *xml_dstport = "dstport";
char *xml_user = "******";
char *xml_url = "url";
char *xml_id = "id";
char *xml_data = "extra_data";
char *xml_hostname = "hostname";
char *xml_program_name = "program_name";
char *xml_status = "status";
char *xml_action = "action";
char *xml_compiled = "compiled_rule";
char *xml_if_sid = "if_sid";
char *xml_if_group = "if_group";
char *xml_if_level = "if_level";
char *xml_fts = "if_fts";
char *xml_if_matched_regex = "if_matched_regex";
char *xml_if_matched_group = "if_matched_group";
char *xml_if_matched_sid = "if_matched_sid";
char *xml_same_source_ip = "same_source_ip";
char *xml_same_src_port = "same_src_port";
char *xml_same_dst_port = "same_dst_port";
char *xml_same_user = "******";
char *xml_same_location = "same_location";
char *xml_same_id = "same_id";
char *xml_dodiff = "check_diff";
char *xml_different_url = "different_url";
char *xml_notsame_source_ip = "not_same_source_ip";
char *xml_notsame_user = "******";
char *xml_notsame_agent = "not_same_agent";
char *xml_notsame_id = "not_same_id";
char *xml_options = "options";
char *rulepath;
int i;
/* If no directory in the rulefile add the default */
if((strchr(rulefile, '/')) == NULL)
{
/* Building the rule file name + path */
i = strlen(RULEPATH) + strlen(rulefile) + 2;
rulepath = (char *)calloc(i,sizeof(char));
if(!rulepath)
{
ErrorExit(MEM_ERROR,ARGV0);
}
snprintf(rulepath,i,"%s/%s",RULEPATH,rulefile);
}
else
{
os_strdup(rulefile, rulepath);
debug1("%s is the rulefile", rulefile);
debug1("Not modifing the rule path");
}
/* Reading the XML */
if(OS_ReadXML(rulepath,&xml) < 0)
{
merror(XML_ERROR, __local_name, rulepath, xml.err, xml.err_line);
free(rulepath);
return(-1);
}
/* Debug wrapper */
debug1("%s: DEBUG: read xml for rule '%s'.", __local_name, rulepath);
/* Applying any variable found */
if(OS_ApplyVariables(&xml) != 0)
{
merror(XML_ERROR_VAR, __local_name, rulepath, xml.err);
return(-1);
}
/* Debug wrapper */
debug1("%s: DEBUG: XML Variables applied.", __local_name);
/* Getting the root elements */
node = OS_GetElementsbyNode(&xml, NULL);
if(!node)
{
merror(CONFIG_ERROR, __local_name, rulepath);
OS_ClearXML(&xml);
return(-1);
}
/* Zeroing the rule memory -- not used anymore */
free(rulepath);
/* Checking if there is any invalid global option */
i = 0;
while(node[i])
{
if(node[i]->element)
{
/* Verifying group */
if(strcasecmp(node[i]->element,xml_group) != 0)
{
merror(RL_INV_ROOT, __local_name, node[i]->element);
OS_ClearXML(&xml);
return(-1);
}
/* Checking group attribute -- only name is allowed */
if((!node[i]->attributes) || (!node[i]->values)||
(!node[i]->values[0]) || (!node[i]->attributes[0]) ||
(strcasecmp(node[i]->attributes[0],"name") != 0) ||
(node[i]->attributes[1]))
{
merror(RL_INV_ROOT, __local_name, node[i]->element);
OS_ClearXML(&xml);
return(-1);
}
}
else
{
merror(XML_READ_ERROR, __local_name);
OS_ClearXML(&xml);
return(-1);
}
i++;
}
/* Getting the rules now */
i = 0;
while(node[i])
{
int j = 0;
XML_NODE rule = NULL;
/* Getting all rules for a global group */
rule = OS_GetElementsbyNode(&xml,node[i]);
if(rule == NULL)
{
i++;
continue;
}
/* Looping on the rules node */
while(rule[j])
{
/* Rules options */
int k = 0;
char *regex = NULL, *match = NULL, *url = NULL,
*if_matched_regex = NULL, *if_matched_group = NULL,
*user = NULL, *id = NULL, *srcport = NULL,
*dstport = NULL, *status = NULL, *hostname = NULL,
*extra_data = NULL, *program_name = NULL;
RuleInfo *config_ruleinfo = NULL;
XML_NODE rule_opt = NULL;
/* Checking if the rule element is correct */
if((!rule[j]->element)||
(strcasecmp(rule[j]->element,xml_rule) != 0))
{
merror(RL_INV_RULE, __local_name, node[i]->element);
OS_ClearXML(&xml);
return(-1);
}
/* Checking for the attributes of the rule */
if((!rule[j]->attributes) || (!rule[j]->values))
{
merror(RL_INV_RULE, __local_name, rulefile);
OS_ClearXML(&xml);
return(-1);
}
/* Attribute block */
config_ruleinfo = _OS_AllocateRule();
if(_OS_GetRulesAttributes(rule[j]->attributes, rule[j]->values,
config_ruleinfo) < 0)
{
merror(RL_INV_ATTR, __local_name, rulefile);
OS_ClearXML(&xml);
return(-1);
}
/* We must have an id or level */
if((config_ruleinfo->sigid == -1)||(config_ruleinfo->level == -1))
{
merror(RL_INV_ATTR, __local_name, rulefile);
OS_ClearXML(&xml);
return(-1);
}
/* Here we can assign the group name to the rule.
* The level is correct so the rule is probably going to
* be fine
*/
os_strdup(node[i]->values[0], config_ruleinfo->group);
/* Getting rules options */
rule_opt = OS_GetElementsbyNode(&xml, rule[j]);
if(rule_opt == NULL)
{
merror(RL_NO_OPT, __local_name, config_ruleinfo->sigid);
OS_ClearXML(&xml);
return(-1);
}
/* Reading the whole rule block */
while(rule_opt[k])
{
if((!rule_opt[k]->element)||(!rule_opt[k]->content))
{
break;
}
else if(strcasecmp(rule_opt[k]->element,xml_regex)==0)
{
regex =
os_LoadString(regex,
rule_opt[k]->content);
}
else if(strcasecmp(rule_opt[k]->element,xml_match)==0)
{
match =
os_LoadString(match,
rule_opt[k]->content);
}
else if(strcasecmp(rule_opt[k]->element, xml_decoded) == 0)
{
}
else if(strcasecmp(rule_opt[k]->element,xml_info) == 0)
{
config_ruleinfo->info=
os_LoadString(config_ruleinfo->info,
rule_opt[k]->content);
}
else if(strcasecmp(rule_opt[k]->element,xml_day_time) == 0)
{
config_ruleinfo->day_time =
OS_IsValidTime(rule_opt[k]->content);
if(!config_ruleinfo->day_time)
{
merror(INVALID_CONFIG, __local_name,
rule_opt[k]->element,
rule_opt[k]->content);
return(-1);
}
if(!(config_ruleinfo->alert_opts & DO_EXTRAINFO))
config_ruleinfo->alert_opts |= DO_EXTRAINFO;
}
else if(strcasecmp(rule_opt[k]->element,xml_week_day) == 0)
{
config_ruleinfo->week_day =
OS_IsValidDay(rule_opt[k]->content);
if(!config_ruleinfo->week_day)
{
merror(INVALID_CONFIG, __local_name,
rule_opt[k]->element,
rule_opt[k]->content);
return(-1);
}
if(!(config_ruleinfo->alert_opts & DO_EXTRAINFO))
config_ruleinfo->alert_opts |= DO_EXTRAINFO;
}
else if(strcasecmp(rule_opt[k]->element,xml_group) == 0)
{
config_ruleinfo->group =
os_LoadString(config_ruleinfo->group,
rule_opt[k]->content);
}
else if(strcasecmp(rule_opt[k]->element,xml_cve) == 0)
{
config_ruleinfo->cve=
os_LoadString(config_ruleinfo->cve,
rule_opt[k]->content);
}
else if(strcasecmp(rule_opt[k]->element,xml_comment) == 0)
{
char *newline;
newline = strchr(rule_opt[k]->content, '\n');
if(newline)
{
*newline = ' ';
}
config_ruleinfo->comment=
os_LoadString(config_ruleinfo->comment,
rule_opt[k]->content);
}
else if(strcasecmp(rule_opt[k]->element,xml_srcip)==0)
{
int ip_s = 0;
/* Getting size of source ip list */
while(config_ruleinfo->srcip &&
config_ruleinfo->srcip[ip_s])
{
ip_s++;
}
config_ruleinfo->srcip =
realloc(config_ruleinfo->srcip,
(ip_s + 2) * sizeof(os_ip *));
/* Allocating memory for the individual entries */
os_calloc(1, sizeof(os_ip),
config_ruleinfo->srcip[ip_s]);
config_ruleinfo->srcip[ip_s +1] = NULL;
/* Checking if the ip is valid */
if(!OS_IsValidIP(rule_opt[k]->content,
config_ruleinfo->srcip[ip_s]))
{
merror(INVALID_IP, __local_name, rule_opt[k]->content);
return(-1);
}
if(!(config_ruleinfo->alert_opts & DO_PACKETINFO))
config_ruleinfo->alert_opts |= DO_PACKETINFO;
}
else if(strcasecmp(rule_opt[k]->element,xml_dstip)==0)
{
int ip_s = 0;
/* Getting size of source ip list */
while(config_ruleinfo->dstip &&
config_ruleinfo->dstip[ip_s])
{
ip_s++;
}
config_ruleinfo->dstip =
realloc(config_ruleinfo->dstip,
(ip_s + 2) * sizeof(os_ip *));
/* Allocating memory for the individual entries */
os_calloc(1, sizeof(os_ip),
config_ruleinfo->dstip[ip_s]);
config_ruleinfo->dstip[ip_s +1] = NULL;
/* Checking if the ip is valid */
if(!OS_IsValidIP(rule_opt[k]->content,
config_ruleinfo->dstip[ip_s]))
{
merror(INVALID_IP, __local_name, rule_opt[k]->content);
return(-1);
}
if(!(config_ruleinfo->alert_opts & DO_PACKETINFO))
config_ruleinfo->alert_opts |= DO_PACKETINFO;
}
else if(strcasecmp(rule_opt[k]->element,xml_user) == 0)
{
user = os_LoadString(user, rule_opt[k]->content);
if(!(config_ruleinfo->alert_opts & DO_EXTRAINFO))
config_ruleinfo->alert_opts |= DO_EXTRAINFO;
}
else if(strcasecmp(rule_opt[k]->element,xml_id) == 0)
{
id = os_LoadString(id, rule_opt[k]->content);
}
else if(strcasecmp(rule_opt[k]->element,xml_srcport) == 0)
{
srcport = os_LoadString(srcport, rule_opt[k]->content);
if(!(config_ruleinfo->alert_opts & DO_PACKETINFO))
config_ruleinfo->alert_opts |= DO_PACKETINFO;
}
else if(strcasecmp(rule_opt[k]->element,xml_dstport) == 0)
{
dstport = os_LoadString(dstport, rule_opt[k]->content);
if(!(config_ruleinfo->alert_opts & DO_PACKETINFO))
config_ruleinfo->alert_opts |= DO_PACKETINFO;
}
else if(strcasecmp(rule_opt[k]->element,xml_status)==0)
{
status = os_LoadString(status, rule_opt[k]->content);
if(!(config_ruleinfo->alert_opts & DO_EXTRAINFO))
config_ruleinfo->alert_opts |= DO_EXTRAINFO;
}
else if(strcasecmp(rule_opt[k]->element,xml_hostname) == 0)
{
hostname = os_LoadString(hostname, rule_opt[k]->content);
if(!(config_ruleinfo->alert_opts & DO_EXTRAINFO))
config_ruleinfo->alert_opts |= DO_EXTRAINFO;
}
else if(strcasecmp(rule_opt[k]->element,xml_data)==0)
{
extra_data = os_LoadString(extra_data, rule_opt[k]->content);
if(!(config_ruleinfo->alert_opts & DO_EXTRAINFO))
config_ruleinfo->alert_opts |= DO_EXTRAINFO;
}
else if(strcasecmp(rule_opt[k]->element,
xml_program_name)==0)
{
program_name = os_LoadString(program_name,
rule_opt[k]->content);
}
else if(strcasecmp(rule_opt[k]->element,xml_action) == 0)
{
config_ruleinfo->action =
os_LoadString(config_ruleinfo->action,
rule_opt[k]->content);
}
else if(strcasecmp(rule_opt[k]->element,xml_url) == 0)
{
url= os_LoadString(url, rule_opt[k]->content);
}
else if(strcasecmp(rule_opt[k]->element, xml_compiled)==0)
{
/* Not using this in here. */
}
/* We allow these categories so far */
else if(strcasecmp(rule_opt[k]->element, xml_category)==0)
{
if(strcmp(rule_opt[k]->content, "firewall") == 0)
{
config_ruleinfo->category = FIREWALL;
}
else if(strcmp(rule_opt[k]->content, "ids") == 0)
{
config_ruleinfo->category = IDS;
}
else if(strcmp(rule_opt[k]->content, "syslog") == 0)
{
config_ruleinfo->category = SYSLOG;
}
else if(strcmp(rule_opt[k]->content, "web-log") == 0)
{
config_ruleinfo->category = WEBLOG;
}
else if(strcmp(rule_opt[k]->content, "squid") == 0)
{
config_ruleinfo->category = SQUID;
}
else if(strcmp(rule_opt[k]->content,"windows") == 0)
{
config_ruleinfo->category = WINDOWS;
}
else if(strcmp(rule_opt[k]->content,"ossec") == 0)
{
config_ruleinfo->category = OSSEC_RL;
}
else
{
merror(INVALID_CAT, __local_name, rule_opt[k]->content);
return(-1);
}
}
else if(strcasecmp(rule_opt[k]->element,xml_if_sid)==0)
{
config_ruleinfo->if_sid=
os_LoadString(config_ruleinfo->if_sid,
rule_opt[k]->content);
}
else if(strcasecmp(rule_opt[k]->element,xml_if_level)==0)
{
if(!OS_StrIsNum(rule_opt[k]->content))
{
merror(INVALID_CONFIG, __local_name,
xml_if_level,
rule_opt[k]->content);
return(-1);
}
config_ruleinfo->if_level=
os_LoadString(config_ruleinfo->if_level,
rule_opt[k]->content);
}
else if(strcasecmp(rule_opt[k]->element,xml_if_group)==0)
{
config_ruleinfo->if_group=
os_LoadString(config_ruleinfo->if_group,
rule_opt[k]->content);
}
else if(strcasecmp(rule_opt[k]->element,
xml_if_matched_regex) == 0)
{
config_ruleinfo->context = 1;
if_matched_regex=
os_LoadString(if_matched_regex,
rule_opt[k]->content);
}
else if(strcasecmp(rule_opt[k]->element,
xml_if_matched_group) == 0)
{
config_ruleinfo->context = 1;
if_matched_group=
os_LoadString(if_matched_group,
rule_opt[k]->content);
}
else if(strcasecmp(rule_opt[k]->element,
xml_if_matched_sid) == 0)
{
config_ruleinfo->context = 1;
if(!OS_StrIsNum(rule_opt[k]->content))
{
merror(INVALID_CONFIG, __local_name,
rule_opt[k]->element,
rule_opt[k]->content);
return(-1);
}
config_ruleinfo->if_matched_sid =
atoi(rule_opt[k]->content);
}
else if(strcasecmp(rule_opt[k]->element,
xml_same_source_ip)==0)
{
config_ruleinfo->context_opts|= SAME_SRCIP;
}
else if(strcasecmp(rule_opt[k]->element,
xml_same_src_port)==0)
{
config_ruleinfo->context_opts|= SAME_SRCPORT;
if(!(config_ruleinfo->alert_opts & SAME_EXTRAINFO))
config_ruleinfo->alert_opts |= SAME_EXTRAINFO;
}
else if(strcasecmp(rule_opt[k]->element,
xml_dodiff)==0)
{
config_ruleinfo->context++;
config_ruleinfo->context_opts|= SAME_DODIFF;
if(!(config_ruleinfo->alert_opts & DO_EXTRAINFO))
{
config_ruleinfo->alert_opts |= DO_EXTRAINFO;
}
}
else if(strcasecmp(rule_opt[k]->element,
xml_same_dst_port) == 0)
{
config_ruleinfo->context_opts|= SAME_DSTPORT;
if(!(config_ruleinfo->alert_opts & SAME_EXTRAINFO))
config_ruleinfo->alert_opts |= SAME_EXTRAINFO;
}
else if(strcasecmp(rule_opt[k]->element,
xml_notsame_source_ip)==0)
{
config_ruleinfo->context_opts&= NOT_SAME_SRCIP;
}
else if(strcmp(rule_opt[k]->element, xml_same_id) == 0)
{
config_ruleinfo->context_opts|= SAME_ID;
}
else if(strcmp(rule_opt[k]->element,
xml_different_url) == 0)
{
config_ruleinfo->context_opts|= DIFFERENT_URL;
if(!(config_ruleinfo->alert_opts & SAME_EXTRAINFO))
config_ruleinfo->alert_opts |= SAME_EXTRAINFO;
}
else if(strcmp(rule_opt[k]->element,xml_notsame_id) == 0)
{
config_ruleinfo->context_opts&= NOT_SAME_ID;
}
else if(strcasecmp(rule_opt[k]->element,
xml_fts) == 0)
{
config_ruleinfo->alert_opts |= DO_FTS;
}
else if(strcasecmp(rule_opt[k]->element,
xml_same_user)==0)
{
config_ruleinfo->context_opts|= SAME_USER;
if(!(config_ruleinfo->alert_opts & SAME_EXTRAINFO))
config_ruleinfo->alert_opts |= SAME_EXTRAINFO;
}
else if(strcasecmp(rule_opt[k]->element,
xml_notsame_user)==0)
{
config_ruleinfo->context_opts&= NOT_SAME_USER;
}
else if(strcasecmp(rule_opt[k]->element,
xml_same_location)==0)
{
config_ruleinfo->context_opts|= SAME_LOCATION;
if(!(config_ruleinfo->alert_opts & SAME_EXTRAINFO))
config_ruleinfo->alert_opts |= SAME_EXTRAINFO;
}
else if(strcasecmp(rule_opt[k]->element,
xml_notsame_agent)==0)
{
config_ruleinfo->context_opts&= NOT_SAME_AGENT;
}
else if(strcasecmp(rule_opt[k]->element,
xml_options) == 0)
{
if(strcmp("alert_by_email",
rule_opt[k]->content) == 0)
{
if(!(config_ruleinfo->alert_opts & DO_MAILALERT))
{
config_ruleinfo->alert_opts|= DO_MAILALERT;
}
}
else if(strcmp("no_email_alert",
rule_opt[k]->content) == 0)
{
if(config_ruleinfo->alert_opts & DO_MAILALERT)
{
config_ruleinfo->alert_opts&=0xfff-DO_MAILALERT;
}
}
else if(strcmp("log_alert",
rule_opt[k]->content) == 0)
{
if(!(config_ruleinfo->alert_opts & DO_LOGALERT))
{
config_ruleinfo->alert_opts|= DO_LOGALERT;
}
}
else if(strcmp("no_log", rule_opt[k]->content) == 0)
{
if(config_ruleinfo->alert_opts & DO_LOGALERT)
{
config_ruleinfo->alert_opts &=0xfff-DO_LOGALERT;
}
}
else if(strcmp("no_ar", rule_opt[k]->content) == 0)
{
if(!(config_ruleinfo->alert_opts & NO_AR))
{
config_ruleinfo->alert_opts|= NO_AR;
}
}
else
{
merror(XML_VALUEERR, __local_name, xml_options,
rule_opt[k]->content);
merror(INVALID_ELEMENT, __local_name,
rule_opt[k]->element,
rule_opt[k]->content);
OS_ClearXML(&xml);
return(-1);
}
}
else if(strcasecmp(rule_opt[k]->element,
xml_ignore) == 0)
{
if(strstr(rule_opt[k]->content, "user") != NULL)
{
config_ruleinfo->ignore|=FTS_USER;
}
if(strstr(rule_opt[k]->content, "srcip") != NULL)
{
config_ruleinfo->ignore|=FTS_SRCIP;
}
if(strstr(rule_opt[k]->content, "dstip") != NULL)
{
config_ruleinfo->ignore|=FTS_DSTIP;
}
if(strstr(rule_opt[k]->content, "id") != NULL)
{
config_ruleinfo->ignore|=FTS_ID;
}
if(strstr(rule_opt[k]->content,"location")!= NULL)
{
config_ruleinfo->ignore|=FTS_LOCATION;
}
if(strstr(rule_opt[k]->content,"data")!= NULL)
{
config_ruleinfo->ignore|=FTS_DATA;
}
if(strstr(rule_opt[k]->content, "name") != NULL)
{
config_ruleinfo->ignore|=FTS_NAME;
}
if(!config_ruleinfo->ignore)
{
merror(INVALID_ELEMENT, __local_name,
rule_opt[k]->element,
rule_opt[k]->content);
return(-1);
}
}
else if(strcasecmp(rule_opt[k]->element,
xml_check_if_ignored) == 0)
{
if(strstr(rule_opt[k]->content, "user") != NULL)
{
config_ruleinfo->ckignore|=FTS_USER;
}
if(strstr(rule_opt[k]->content, "srcip") != NULL)
{
config_ruleinfo->ckignore|=FTS_SRCIP;
}
if(strstr(rule_opt[k]->content, "dstip") != NULL)
{
config_ruleinfo->ckignore|=FTS_DSTIP;
}
if(strstr(rule_opt[k]->content, "id") != NULL)
{
config_ruleinfo->ckignore|=FTS_ID;
}
if(strstr(rule_opt[k]->content,"location")!= NULL)
{
config_ruleinfo->ckignore|=FTS_LOCATION;
}
if(strstr(rule_opt[k]->content,"data")!= NULL)
{
config_ruleinfo->ignore|=FTS_DATA;
}
if(strstr(rule_opt[k]->content, "name") != NULL)
{
config_ruleinfo->ckignore|=FTS_NAME;
}
if(!config_ruleinfo->ckignore)
{
merror(INVALID_ELEMENT, __local_name,
rule_opt[k]->element,
rule_opt[k]->content);
return(-1);
}
}
/* XXX As new features are added into ../analysisd/rules.c
* This code needs to be updated to match, but is out of date
* it's become a nightmare to correct with out just make the
* problem for someone later.
*
* This hack will allow any crap xml to pass without an
* error. The correct fix is to refactor the code so that
* ../analysisd/rules* and this code are not duplicates
*
else
{
merror(XML_INVELEM, __local_name, rule_opt[k]->element);
OS_ClearXML(&xml);
return(-1);
}
*/
k++;
}
/* Checking for a valid use of frequency */
if((config_ruleinfo->context_opts ||
config_ruleinfo->frequency) &&
!config_ruleinfo->context)
{
merror("%s: Invalid use of frequency/context options. "
"Missing if_matched on rule '%d'.",
__local_name, config_ruleinfo->sigid);
OS_ClearXML(&xml);
return(-1);
}
/* If if_matched_group we must have a if_sid or if_group */
if(if_matched_group)
{
if(!config_ruleinfo->if_sid && !config_ruleinfo->if_group)
{
os_strdup(if_matched_group, config_ruleinfo->if_group);
}
}
/* If_matched_sid, we need to get the if_sid */
if(config_ruleinfo->if_matched_sid &&
!config_ruleinfo->if_sid &&
!config_ruleinfo->if_group)
{
os_calloc(16, sizeof(char), config_ruleinfo->if_sid);
snprintf(config_ruleinfo->if_sid, 15, "%d",
config_ruleinfo->if_matched_sid);
}
/* Checking the regexes */
if(regex)
{
os_calloc(1, sizeof(OSRegex), config_ruleinfo->regex);
if(!OSRegex_Compile(regex, config_ruleinfo->regex, 0))
{
merror(REGEX_COMPILE, __local_name, regex,
config_ruleinfo->regex->error);
return(-1);
}
free(regex);
regex = NULL;
}
/* Adding in match */
if(match)
{
os_calloc(1, sizeof(OSMatch), config_ruleinfo->match);
if(!OSMatch_Compile(match, config_ruleinfo->match, 0))
{
merror(REGEX_COMPILE, __local_name, match,
config_ruleinfo->match->error);
return(-1);
}
free(match);
match = NULL;
}
/* Adding in id */
if(id)
{
os_calloc(1, sizeof(OSMatch), config_ruleinfo->id);
if(!OSMatch_Compile(id, config_ruleinfo->id, 0))
{
merror(REGEX_COMPILE, __local_name, id,
config_ruleinfo->id->error);
return(-1);
}
free(id);
id = NULL;
}
/* Adding srcport */
if(srcport)
{
os_calloc(1, sizeof(OSMatch), config_ruleinfo->srcport);
if(!OSMatch_Compile(srcport, config_ruleinfo->srcport, 0))
{
merror(REGEX_COMPILE, __local_name, srcport,
config_ruleinfo->id->error);
return(-1);
}
free(srcport);
srcport = NULL;
}
/* Adding dstport */
if(dstport)
{
os_calloc(1, sizeof(OSMatch), config_ruleinfo->dstport);
if(!OSMatch_Compile(dstport, config_ruleinfo->dstport, 0))
{
merror(REGEX_COMPILE, __local_name, dstport,
config_ruleinfo->id->error);
return(-1);
}
free(dstport);
dstport = NULL;
}
/* Adding in status */
if(status)
{
os_calloc(1, sizeof(OSMatch), config_ruleinfo->status);
if(!OSMatch_Compile(status, config_ruleinfo->status, 0))
{
merror(REGEX_COMPILE, __local_name, status,
config_ruleinfo->status->error);
return(-1);
}
free(status);
status = NULL;
}
/* Adding in hostname */
if(hostname)
{
os_calloc(1, sizeof(OSMatch), config_ruleinfo->hostname);
if(!OSMatch_Compile(hostname, config_ruleinfo->hostname,0))
{
merror(REGEX_COMPILE, __local_name, hostname,
config_ruleinfo->hostname->error);
return(-1);
}
free(hostname);
hostname = NULL;
}
/* Adding extra data */
if(extra_data)
{
os_calloc(1, sizeof(OSMatch), config_ruleinfo->extra_data);
if(!OSMatch_Compile(extra_data,
config_ruleinfo->extra_data, 0))
{
merror(REGEX_COMPILE, __local_name, extra_data,
config_ruleinfo->extra_data->error);
return(-1);
}
free(extra_data);
extra_data = NULL;
}
/* Adding in program name */
if(program_name)
{
os_calloc(1,sizeof(OSMatch),config_ruleinfo->program_name);
if(!OSMatch_Compile(program_name,
config_ruleinfo->program_name,0))
{
merror(REGEX_COMPILE, __local_name, program_name,
config_ruleinfo->program_name->error);
return(-1);
}
free(program_name);
program_name = NULL;
}
/* Adding in user */
if(user)
{
os_calloc(1, sizeof(OSMatch), config_ruleinfo->user);
if(!OSMatch_Compile(user, config_ruleinfo->user, 0))
{
merror(REGEX_COMPILE, __local_name, user,
config_ruleinfo->user->error);
return(-1);
}
free(user);
user = NULL;
}
/* Adding in url */
if(url)
{
os_calloc(1, sizeof(OSMatch), config_ruleinfo->url);
if(!OSMatch_Compile(url, config_ruleinfo->url, 0))
{
merror(REGEX_COMPILE, __local_name, url,
config_ruleinfo->url->error);
return(-1);
}
free(url);
url = NULL;
}
/* Adding matched_group */
if(if_matched_group)
{
os_calloc(1,sizeof(OSMatch),config_ruleinfo->if_matched_group);
if(!OSMatch_Compile(if_matched_group,
config_ruleinfo->if_matched_group,0))
{
merror(REGEX_COMPILE, __local_name, if_matched_group,
config_ruleinfo->if_matched_group->error);
return(-1);
}
free(if_matched_group);
if_matched_group = NULL;
}
/* Adding matched_regex */
if(if_matched_regex)
{
os_calloc(1, sizeof(OSRegex),
config_ruleinfo->if_matched_regex);
if(!OSRegex_Compile(if_matched_regex,
config_ruleinfo->if_matched_regex, 0))
{
merror(REGEX_COMPILE, __local_name, if_matched_regex,
config_ruleinfo->if_matched_regex->error);
return(-1);
}
free(if_matched_regex);
if_matched_regex = NULL;
}
/* Calling the function provided. */
ruleact_function(config_ruleinfo, data);
j++; /* next rule */
} /* while(rule[j]) */
OS_ClearNode(rule);
i++;
} /* while (node[i]) */
/* Cleaning global node */
OS_ClearNode(node);
OS_ClearXML(&xml);
/* Done over here */
return(0);
}
int main(int argc, char **argv)
{
int i = 0;
OS_XML xml;
XML_NODE node = NULL;
/* File name must be given */
if (argc < 2) {
printf("Usage: %s file\n", argv[0]);
return (-1);
}
/* Read the XML. Print error and line number */
if (OS_ReadXML(argv[1], &xml) < 0) {
printf("OS_ReadXML error: %s, line :%d\n", xml.err, xml.err_line);
return (1);
}
if (OS_ApplyVariables(&xml) != 0) {
printf("OS_ReadXML error: Applying variables: %s\n", xml.err);
return (1);
}
/* Get all nodes */
node = OS_GetElementsbyNode(&xml, NULL);
if (node == NULL) {
printf("OS_GetElementsbyNode error: %s, line: %d\n", xml.err, xml.err_line);
return (1);
}
i = 0;
while (node[i]) {
int j = 0;
XML_NODE cnode;
cnode = OS_GetElementsbyNode(&xml, node[i]);
if (cnode == NULL) {
i++;
continue;
}
while (cnode[j]) {
printf("Element: %s -> %s\n",
cnode[j]->element,
cnode[j]->content);
if (cnode[j]->attributes && cnode[j]->values) {
int k = 0;
while (cnode[j]->attributes[k]) {
printf("attr %s:%s\n",
cnode[j]->attributes[k],
cnode[j]->values[k]);
k++;
}
}
j++;
}
OS_ClearNode(cnode);
i++;
}
/* Clear the nodes */
OS_ClearNode(node);
node = NULL;
OS_ClearXML(&xml);
return (0);
}