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// file XOR test 1
#include <string>
#include <iostream>
#include <fstream>
#include <boost/filesystem.hpp>
bool XOR(const std::string& filePath, const std::string& outputPath, const std::string& key)
{
    std::ifstream in(filePath.c_str(), std::ios::binary);
    std::ofstream out(outputPath.c_str(), std::ios::binary);
 
    //files succesfully opened?
    if(!in || !out)
        return false;
 
    std::string::const_iterator keyChr = key.begin();
 
    //start encryption
    char chr;
    while(in.get(chr) && out)
    {
        out << char(chr ^ (*keyChr));
 
        if(++keyChr == key.end())
            keyChr = key.begin();
    }
 
    in.close();
    out.close();
 
    return true;
}
int main()
{
    XOR("test.bin", "test.out", std::string(32, '*'));
    std::cout << "File size: " << boost::filesystem::file_size("test.bin") << '\n';
}
 

/home/VU1qjY/ccB9mvds.o: In function `global constructors keyed to _Z3XORRKSsS0_S0_':
prog.cpp:(.text+0x2c): undefined reference to `boost::system::get_system_category()'
prog.cpp:(.text+0x36): undefined reference to `boost::system::get_generic_category()'
prog.cpp:(.text+0x40): undefined reference to `boost::system::get_generic_category()'
prog.cpp:(.text+0x4a): undefined reference to `boost::system::get_generic_category()'
prog.cpp:(.text+0x54): undefined reference to `boost::system::get_system_category()'
/home/VU1qjY/ccB9mvds.o: In function `boost::enable_if<boost::filesystem::is_basic_path<boost::filesystem::basic_path<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, boost::filesystem::path_traits> >, unsigned long long>::type boost::filesystem::file_size<boost::filesystem::basic_path<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, boost::filesystem::path_traits> >(boost::filesystem::basic_path<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, boost::filesystem::path_traits> const&)':
prog.cpp:(.text._ZN5boost10filesystem9file_sizeINS0_10basic_pathISsNS0_11path_traitsEEEEENS_9enable_ifINS0_13is_basic_pathIT_EEyE4typeERKS7_[boost::enable_if<boost::filesystem::is_basic_path<boost::filesystem::basic_path<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, boost::filesystem::path_traits> >, unsigned long long>::type boost::filesystem::file_size<boost::filesystem::basic_path<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, boost::filesystem::path_traits> >(boost::filesystem::basic_path<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, boost::filesystem::path_traits> const&)]+0x53): undefined reference to `boost::filesystem::detail::file_size_api(std::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)'
collect2: ld returned 1 exit status

Standard output is empty