Qual a melhor API para se trabalhar com hash SHA-2 e SHA-1? [RESOLVIDO]

#include <algorithm>

#include <iomanip>

#include <iostream>

#include <iterator>

#include <string>

#include <sstream>



#include <openssl/sha.h>



std::string sha512sum(const std::string& input)

{    

    unsigned char digest[SHA512_DIGEST_LENGTH];

    

    // compute hash

    SHA512(reinterpret_cast<unsigned const char*>(input.c_str()), 

           input.size(), 

           &digest[0]);

    

    

    // convert byte digest to hex representation

    std::stringstream ss;

    for(int i = 0; i < SHA512_DIGEST_LENGTH; i++) {

        ss << std::hex << std::setw(2) << std::setfill('0') << static_cast<int>(digest[i]);

    }

    

    return ss.str();

}



int main()

{

    using namespace std;

    

    string a {"hello\n"};

    

    cout << a << "\n\nsha512 hash: " << sha512sum(a) << endl;

    

    return 0;

}