mirror of
https://github.com/owasp-modsecurity/ModSecurity.git
synced 2025-08-14 05:45:59 +03:00
167 lines
5.0 KiB
C++
167 lines
5.0 KiB
C++
/*
|
|
* ModSecurity, http://www.modsecurity.org/
|
|
* Copyright (c) 2015 Trustwave Holdings, Inc. (http://www.trustwave.com/)
|
|
*
|
|
* You may not use this file except in compliance with
|
|
* the License. You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* If any of the files related to licensing are missing or if you have any
|
|
* other questions related to licensing please contact Trustwave Holdings, Inc.
|
|
* directly using the email address security@modsecurity.org.
|
|
*
|
|
*/
|
|
|
|
#include "src/actions/set_var.h"
|
|
|
|
#include <iostream>
|
|
#include <string>
|
|
#include <memory>
|
|
|
|
#include "modsecurity/transaction.h"
|
|
#include "modsecurity/rules.h"
|
|
#include "modsecurity/rule.h"
|
|
#include "src/macro_expansion.h"
|
|
#include "src/utils/string.h"
|
|
|
|
|
|
namespace modsecurity {
|
|
namespace actions {
|
|
|
|
|
|
bool SetVar::init(std::string *error) {
|
|
size_t pos;
|
|
|
|
if (m_variableName.empty() == false) {
|
|
pos = m_variableName.find(".");
|
|
if (pos != std::string::npos) {
|
|
m_collectionName = std::string(m_variableName, 0, pos);
|
|
m_collectionName = utils::string::toupper(m_collectionName);
|
|
m_variableName = std::string(m_variableName, pos + 1,
|
|
m_variableName.size() - (pos + 1));
|
|
} else {
|
|
error->assign("Missing the collection and/or variable name");
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
// Resolv operation
|
|
m_operation = setToOneOperation;
|
|
pos = m_parser_payload.find("=");
|
|
if (pos != std::string::npos) {
|
|
m_operation = setOperation;
|
|
}
|
|
pos = m_parser_payload.find("=+");
|
|
if (pos != std::string::npos) {
|
|
m_operation = sumAndSetOperation;
|
|
}
|
|
pos = m_parser_payload.find("=-");
|
|
if (pos != std::string::npos) {
|
|
m_operation = substractAndSetOperation;
|
|
}
|
|
|
|
// Collection name
|
|
pos = m_parser_payload.find(".");
|
|
if (pos != std::string::npos) {
|
|
m_collectionName = std::string(m_parser_payload, 0, pos);
|
|
m_collectionName = utils::string::toupper(m_collectionName);
|
|
} else {
|
|
error->assign("Missing the collection and/or variable name");
|
|
return false;
|
|
}
|
|
|
|
// Variable name
|
|
if (m_operation == setToOneOperation) {
|
|
m_variableName = std::string(m_parser_payload, pos + 1,
|
|
m_parser_payload.length()
|
|
- (pos + 1));
|
|
} else {
|
|
size_t pos2 = m_parser_payload.find("=");
|
|
m_variableName = std::string(m_parser_payload, pos + 1,
|
|
pos2 - (pos + 1));
|
|
if (pos2 + 2 > m_parser_payload.length()) {
|
|
m_predicate = "";
|
|
} else {
|
|
if (m_operation == setOperation) {
|
|
m_predicate = std::string(m_parser_payload, pos2 + 1,
|
|
m_parser_payload.length() - (pos2));
|
|
} else {
|
|
m_predicate = std::string(m_parser_payload, pos2 + 2,
|
|
m_parser_payload.length()
|
|
- (pos2 + 1));
|
|
}
|
|
}
|
|
}
|
|
|
|
if (m_collectionName.empty() || m_variableName.empty()) {
|
|
error->assign("Something wrong with the input format");
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
|
|
bool SetVar::evaluate(Rule *rule, Transaction *transm_parser_payload) {
|
|
std::string targetValue;
|
|
std::string m_variableNameExpanded = MacroExpansion::expand(m_variableName,
|
|
rule, transm_parser_payload);
|
|
std::string resolvedPre = MacroExpansion::expand(m_predicate,
|
|
rule, transm_parser_payload);
|
|
|
|
if (m_operation == setOperation) {
|
|
targetValue = resolvedPre;
|
|
} else if (m_operation == setToOneOperation) {
|
|
targetValue = std::string("1");
|
|
} else if (m_operation == unsetOperation) {
|
|
transm_parser_payload->m_collections.del(m_collectionName + ":" +
|
|
m_variableNameExpanded);
|
|
goto end;
|
|
} else {
|
|
int pre = 0;
|
|
int value = 0;
|
|
|
|
try {
|
|
pre = stoi(resolvedPre);
|
|
} catch (...) {
|
|
pre = 0;
|
|
}
|
|
|
|
try {
|
|
std::unique_ptr<std::string> resolvedValue =
|
|
transm_parser_payload->m_collections.resolveFirst(
|
|
m_collectionName,
|
|
m_variableNameExpanded);
|
|
if (resolvedValue == NULL || resolvedValue->empty()) {
|
|
value = 0;
|
|
} else {
|
|
value = stoi(*resolvedValue);
|
|
}
|
|
} catch (...) {
|
|
value = 0;
|
|
}
|
|
|
|
if (m_operation == sumAndSetOperation) {
|
|
targetValue = std::to_string(value + pre);
|
|
} else if (m_operation == substractAndSetOperation) {
|
|
targetValue = std::to_string(value - pre);
|
|
}
|
|
}
|
|
|
|
#ifndef NO_LOGS
|
|
transm_parser_payload->debug(8, "Saving variable: " + m_collectionName \
|
|
+ ":" + m_variableNameExpanded + " with value: " + targetValue);
|
|
#endif
|
|
transm_parser_payload->m_collections.storeOrUpdateFirst(m_collectionName,
|
|
m_variableNameExpanded,
|
|
transm_parser_payload->m_rules->m_secWebAppId.m_value, targetValue);
|
|
|
|
end:
|
|
return true;
|
|
}
|
|
|
|
} // namespace actions
|
|
} // namespace modsecurity
|