我想做一个md5批量加密的软件,谁可以做要批量加密的

#include <string>
#include <optional>
#include <stdexcept>
#include <windows.h>

class MD5
{
public:
    MD5()
    {
        if( !CryptAcquireContext(&hProv_,nullptr,nullptr,PROV_RSA_FULL,CRYPT_VERIFYCONTEXT) )
            throw std::runtime_error("failed to invoke CryptAcquireContext.");
    }
    ~MD5()
    {
        if( hProv_ )
            CryptReleaseContext(hProv_,0);
    }
    MD5( const MD5& ) = delete;
    MD5( MD5&& ) = default;
    MD5& operator=( const MD5& ) = delete;
    MD5& operator=( MD5&& ) = default;

    std::optional<std::string> operator()( const std::string& s ) const
    {
        HCRYPTPROV hHash = 0;
        if( !CryptCreateHash(hProv_,CALG_MD5,0,0,&hHash) )
            return {};

        BYTE buf[16];
        if( !CryptHashData(hHash,(const BYTE*)s.c_str(),s.size(),0) )
            return {};

        DWORD dwHashLen = sizeof(buf);
        if( !CryptGetHashParam(hHash,HP_HASHVAL,buf,&dwHashLen,0) )
            return {};

        CryptDestroyHash(hHash);

        std::string result( 2*sizeof(buf), ' ' );
        for( size_t i=0; i!=std::size(buf); ++i )
        {
            result[2*i+0] = "0123456789abcdef"[buf[i]/0x10];
            result[2*i+1] = "0123456789abcdef"[buf[i]%0x10];
        }
        return result;
    }

private:
    HCRYPTPROV hProv_ = 0;
};

#include <iostream>
#include <fstream>
using namespace std;

int main( void )
{
    const char* src = R"(D:\source\vc2017\cpp001\src.txt)";
    const char* dst = R"(D:\source\vc2017\cpp001\dst.txt)";

    ifstream is(src);
    if( !is )
        return false;

    ofstream os(dst);
    if( !is )
        return false;

    MD5 md5;
    for( string line; getline(is,line); )
    {
        if( line.empty() )
            os << '\n';
        else
        {
            auto m = md5(line).value();
            os << line << '|' << m.substr(8,16) << '|' << m << "|md5\n";
        }
    }
}