touhouSE_th145BGMOnly.zip/touhouSE_src/th11_utility.cpp
#include "stdafx.h"
namespace TH11 { namespace Utility {
namespace {
bool TextCryptImpl(unsigned char *data, unsigned int size) {
BOOST_ASSERT(data);
unsigned char a = 0x77;
unsigned char b = 0x07;
for(unsigned int i = 0; i < size; i++){
data[i] ^= a;
a += b;
b += 0x10;
}
return true;
}
} // anonymous
bool TextDeCrypt(unsigned char *data, unsigned int size) {
return TextCryptImpl(data, size);
}
bool TextDeCrypt(std::vector<unsigned char> &data) {
return TextDeCrypt(&data.front(), data.size());
}
bool TextEnCrypt(unsigned char *data, unsigned int size) {
return TextCryptImpl(data, size);
}
bool TextEnCrypt(std::vector<unsigned char> &data) {
return TextEnCrypt(&data.front(), data.size());
}
} // Utility
} // TH11