如何使用Boost计算文件的md5? [英] how to calculate md5 of a file using boost?

问题描述

我需要计算文件的md5，但是由于某些原因，我不想将我的项目链接到OpenSSL库.对我来说，最好的解决方案之一是通过boost库来实现.我找到了下一个示例:

I need to calculate md5 of a file, but I don't want to link my project with the OpenSSL library for some reason. For me one of the best solutions is make it via boost library. I found next sample:

#include <boost/md5.hpp>
#include <iostream>
#include <fstream>

std::cout << boost::md5("message").hex_str_value();

boost::md5(std::ifstream("file.txt")).hex_str_value();

但不幸的是，当前Boost版本(1.68.0/1.69.0)中没有 boost/md5.hpp 标头.

but unfortunately there is no boost/md5.hpp header in current boost version (1.68.0/1.69.0).

有人可以告诉我如何使用当前的Boost 1.69.0版本实现以下示例吗?

Can somebody tell me how to implement the sample below using current boost version 1.69.0?

我希望这篇文章能对所有像我一样搜索它的人有所帮助.

I hope this post will help everyone who will search it as me.

推荐答案

boost具有以下功能:

boost has such functionality:

#include <iostream>
#include <algorithm>
#include <iterator>
#include <boost/uuid/detail/md5.hpp>
#include <boost/algorithm/hex.hpp>

using boost::uuids::detail::md5;

std::string toString(const md5::digest_type &digest)
{
    const auto charDigest = reinterpret_cast<const char *>(&digest);
    std::string result;
    boost::algorithm::hex(charDigest, charDigest + sizeof(md5::digest_type), std::back_inserter(result));
    return result;
}

int main ()
{
    std::string s;

    while(std::getline(std::cin, s)) {
        md5 hash;
        md5::digest_type digest;

        hash.process_bytes(s.data(), s.size());
        hash.get_digest(digest);

        std::cout << "md5(" << s << ") = " << toString(digest) << '\n';
    }

    return 0;
}

实时示例

这篇关于如何使用Boost计算文件的md5?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！