代码整理为了C语言.
提取了核心的异或代码.
unsigned char* encode(const unsigned char* enbuffer, int enbufferlen)
{
unsigned char* result = (unsigned char*)malloc(enbufferlen * sizeof(char) + 1);
if (result == nullptr) return nullptr;
memset(result, 0, enbufferlen + 1);
for (int i = 0; i < enbufferlen; i += 3)
{
result[i] = enbufferlen ^ (enbuffer[i] + 6);
result[i + 1] = (enbuffer[i + 1] - 6) ^ enbufferlen;
result[i + 2] = enbuffer[i + 2] ^ 6 ^ enbufferlen;
}
return result; // //zerobuffer = flag
}
unsigned char* decode(const unsigned char* debuffer, int debufferlen)
{
unsigned char* result = (unsigned char*)malloc(debufferlen * sizeof(char));
if (result == nullptr) return nullptr;
memset(result, 0, debufferlen + 1);
for (int i = 0; i < debufferlen; i += 3)
{
result[i] = (debufferlen ^ debuffer[i]) -6;
result[i + 1] = (debuffer[i + 1] ^ debufferlen) + 6;
result[i + 2] = debuffer[i + 2] ^ 6 ^ debufferlen;
}
return result;
}
int main(int argc,char**argv)
{
unsigned char buffer[] = "HelloIBinary";
int size = sizeof(buffer) / sizeof(buffer[0]);
unsigned char * CipherText = encode(buffer, size);
unsigned char * PlantText = decode(CipherText, size);
}