如何在C ++中可移植地计算sha1哈希?

本文介绍了如何在C ++中可移植地计算sha1哈希?的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

目标是计算一个缓冲区或多个缓冲区的 SHA1 哈希一个C ++程序.

The objective is to compute the SHA1 hash of a buffer or multiple buffers as part of a C++ program.

推荐答案

我不确定使用boost的UUID的那个是否会正确地将哈希值的前导零(您的字符串应始终具有相同的长度afaik)，所以这里是上面示例的简化版本可以做到这一点:

I'm not sure whether the one using boost's UUID will do leading zeros in hash values correctly (your string should always have the same length afaik), so here's a simplified version of the example above which will do that:

#include <cstdio> #include <string> #include <boost/uuid/sha1.hpp> std::string get_sha1(const std::string& p_arg) { boost::uuids::detail::sha1 sha1; sha1.process_bytes(p_arg.data(), p_arg.size()); unsigned hash[5] = {0}; sha1.get_digest(hash); // Back to string char buf[41] = {0}; for (int i = 0; i < 5; i++) { std::sprintf(buf + (i << 3), "%08x", hash[i]); } return std::string(buf); }