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- speed improvement for anti-hack checking

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This commit is contained in:
Mark Vejvoda
2011-01-15 04:13:15 +00:00
parent 3dac5df814
commit a7ca23d18e
7 changed files with 35 additions and 79 deletions
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8
source/shared_lib/sources/platform/common/platform_common.cpp
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@@ -992,14 +992,13 @@ string ModeInfo::getString() const{
void ValueCheckerVault::addItemToVault(const void *ptr,int value) {
Checksum checksum;
checksum.addString(intToStr(value));
vaultList[ptr] = intToStr(checksum.getSum());
vaultList[ptr] = checksum.addInt(value);
// if(SystemFlags::VERBOSE_MODE_ENABLED) printf("In [%s::%s Line: %d] add vault key [%p] value [%s] [%d]\n",__FILE__,__FUNCTION__,__LINE__,ptr,intToStr(checksum.getSum()).c_str(),value);
}
void ValueCheckerVault::checkItemInVault(const void *ptr,int value) const {
map<const void *,string>::const_iterator iterFind = vaultList.find(ptr);
map<const void *,int32>::const_iterator iterFind = vaultList.find(ptr);
if(iterFind == vaultList.end()) {
if(SystemFlags::VERBOSE_MODE_ENABLED) {
// printf("In [%s::%s Line: %d] check vault key [%p] value [%d]\n",__FILE__,__FUNCTION__,__LINE__,ptr,value);
@@ -1011,8 +1010,7 @@ void ValueCheckerVault::checkItemInVault(const void *ptr,int value) const {
throw std::runtime_error("memory value has been unexpectedly modified (not found)!");
}
Checksum checksum;
checksum.addString(intToStr(value));
if(iterFind->second != intToStr(checksum.getSum())) {
if(iterFind->second != checksum.addInt(value)) {
// if(SystemFlags::VERBOSE_MODE_ENABLED) {
// printf("In [%s::%s Line: %d] check vault key [%p] value [%s] [%d]\n",__FILE__,__FUNCTION__,__LINE__,ptr,intToStr(checksum.getSum()).c_str(),value);
// for(map<const void *,string>::const_iterator iterFind = vaultList.begin();

25
source/shared_lib/sources/util/checksum.cpp
View File

@@ -47,26 +47,39 @@ void Checksum::addByte(int8 value) {
int32 cipher= (value ^ (r >> 8));
r= (cipher + r) * c1 + c2;
sum+= cipher;
sum += cipher;
}
void Checksum::addSum(int32 value) {
sum+= value;
sum += value;
}
void Checksum::addString(const string &value){
for(unsigned int i= 0; i<value.size(); ++i){
int32 Checksum::addInt(const int32 &value) {
int8 byte = (value >> 0) & 0xFF;
addByte(byte);
byte = (value >> 8) & 0xFF;
addByte(byte);
byte = (value >> 16) & 0xFF;
addByte(byte);
byte = (value >> 24) & 0xFF;
addByte(byte);
return sum;
}
void Checksum::addString(const string &value) {
for(unsigned int i = 0; i < value.size(); ++i) {
addByte(value[i]);
}
}
void Checksum::addFile(const string &path){
void Checksum::addFile(const string &path) {
if(path != "") {
fileList[path] = 0;
}
}
bool Checksum::addFileToSum(const string &path){
bool Checksum::addFileToSum(const string &path) {
// OLD SLOW FILE I/O
/*