C＃相当于PHP hash_hmac [英] C# equivalent to hash_hmac in PHP

问题描述

使用.NET和C＃我需要提供使用HMAC SHA512到PHP服务器完整性字符串。
使用C＃中：

using .NET and C# i need to provide an integrity string using HMAC SHA512 to a PHP server . Using in C# :

Encoding encoding = Encoding.UTF8;
byte[] keyByte = encoding.GetBytes(key);
HMACSHA512 hmacsha512 = new HMACSHA512(keyByte);
byte[] messageBytes = encoding.GetBytes(message);
byte[]  hashmessage = hmacsha512.ComputeHash(messageBytes);
return(ByteToString(hashmessage).toUpper());

不过，这并不用PHP hash_hmac匹配（）
PHP code：

But it doesn't match with PHP hash_hmac() PHP code :

$hmac = strtoupper(hash_hmac($pbx_hash, $msg, $binKey));

我试图改变在C＃（UTF8，ASCII，统一code）编码没有成功。

I try to change encoding in C# (utf8, ASCII,Unicode) Without success.

我试着在网上发现了许多解决方案，但没有给出相同的字符串：（

I've tried many solution found on the net but nothing give the same string :(

我无法改变的PHP code，并没有看到什么在C＃中是错误的。

I can't change the PHP code, and doesn't see what's wrong in C#

修改这是 ByteToString （从评论复制）：

Edit This is ByteToString (copied from the comment):

static string ByteToString(byte[] buff)
{
    string sbinary = "";
    for (int i = 0; i < buff.Length; i++)
    {
        sbinary += buff[i].ToString("X2"); /* hex format */
    }
    return (sbinary);
}    

许多毒鼠强后，发现我得到同样的结果，如果PHP hash_hmac键是一个字符串，而不是字节数组。看来，问题出在PHP转换功能$ binKey =包（H *，$ keyTest）;

After many tets, in found that i get the same results if PHP hash_hmac key is a string, not a byte Array . Seems that the problem is with the PHP convert function $binKey = pack("H*", $keyTest);

推荐答案

这个问题必须是键/消息数据的实际重presentation。

The problem must be the actual representation of the key/message data.

请参阅以下测试：

#!/usr/bin/php
<?php
print strtoupper(hash_hmac("sha256", "message", "key"));
?>

输出（通过活 HTTP：//write$c$conline.com/php/ ）：

6E9EF29B75FFFC5B7ABAE527D58FDADB2FE42E7219011976917343065F58ED4A

C＃

using System;
using System.Text;
using System.Security.Cryptography;

public class Program
{
    private const string key = "key";
    private const string message = "message";
    private static readonly Encoding encoding = Encoding.UTF8; 

    static void Main(string[] args)
    {
        var keyByte = encoding.GetBytes(key);
        using (var hmacsha256 = new HMACSHA256(keyByte))
        {
            hmacsha256.ComputeHash(encoding.GetBytes(message));

            Console.WriteLine("Result: {0}", ByteToString(hmacsha256.Hash));
        }
    }
    static string ByteToString(byte[] buff)
    {
        string sbinary = "";
        for (int i = 0; i < buff.Length; i++)
            sbinary += buff[i].ToString("X2"); /* hex format */
        return sbinary;
    }    
}

输出（现场通过 http://ideone.com/JdpeL ）：

Result: 6E9EF29B75FFFC5B7ABAE527D58FDADB2FE42E7219011976917343065F58ED4A

所以，检查PHP输入数据的字符集/编码。同时检查实际的算法（在 $ pbx_hash ）。

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