C# 相当于 PHP 中的 hash_hmac
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C# equivalent to hash_hmac in PHP
提问by Philippe
using .NET and C# i need to provide an integrity string using HMAC SHA512 to a PHP server . Using in C# :
使用 .NET 和 C# 我需要使用 HMAC SHA512 向 PHP 服务器提供完整性字符串。在 C# 中使用：
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());
But it doesn't match with PHP hash_hmac() PHP code :
但它与 PHP hash_hmac() PHP 代码不匹配：
$hmac = strtoupper(hash_hmac($pbx_hash, $msg, $binKey));
I try to change encoding in C# (utf8, ASCII,Unicode) Without success.
我尝试在 C# (utf8, ASCII, Unicode) 中更改编码但没有成功。
I've tried many solution found on the net but nothing give the same string :(
我尝试了很多在网上找到的解决方案，但没有给出相同的字符串:(
I can't change the PHP code, and doesn't see what's wrong in C#
我无法更改 PHP 代码，也看不到 C# 中有什么问题
EditThis is ByteToString(copied from the comment):
编辑这是ByteToString（从评论中复制）：
static string ByteToString(byte[] buff)
{
string sbinary = "";
for (int i = 0; i < buff.Length; i++)
{
sbinary += buff[i].ToString("X2"); /* hex format */
}
return (sbinary);
}
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);
经过多次测试，发现如果 PHP hash_hmac 键是字符串，而不是字节数组，我会得到相同的结果。似乎问题出在 PHP 转换函数 $binKey = pack("H*", $keyTest);
回答by sehe
The problem must be the actual representation of the key/message data.
问题必须是密钥/消息数据的实际表示。
See the following tests:
请参阅以下测试：
PHP
PHP
#!/usr/bin/php
<?php
print strtoupper(hash_hmac("sha256", "message", "key"));
?>
Output (live via http://writecodeonline.com/php/):
输出（通过http://writecodeonline.com/php/直播）：
6E9EF29B75FFFC5B7ABAE527D58FDADB2FE42E7219011976917343065F58ED4A
C#
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;
}
}
Output (live via http://ideone.com/JdpeL):
输出（通过http://ideone.com/JdpeL直播）：
Result: 6E9EF29B75FFFC5B7ABAE527D58FDADB2FE42E7219011976917343065F58ED4A
So, check the character set/encoding of the PHP input data. Also check the actual algorithm (in $pbx_hash).
因此，请检查 PHP 输入数据的字符集/编码。还要检查实际算法（在 中$pbx_hash）。
回答by Philippe
As said upper, the problem was with PHP Pack(H* function used to convert key to byte array. C# Getbytes doesn't give the same result (utf8, asci, unicode...). The solution found here : http://www.nuronconsulting.com/c-pack-h.aspxwas ok for me. now HMAC from C# match with PHP !
如上所说，问题出在 PHP Pack（用于将键转换为字节数组的 H* 函数。C# Getbytes 没有给出相同的结果（utf8、asci、unicode...）。解决方案在这里找到：http:/ /www.nuronconsulting.com/c-pack-h.aspx对我来说没问题。现在来自 C# 的 HMAC 与 PHP 匹配！
public static byte[] PackH(string hex)
{
if ((hex.Length % 2) == 1) hex += '0';
byte[] bytes = new byte[hex.Length / 2];
for (int i = 0; i < hex.Length; i += 2)
{
bytes[i / 2] = Convert.ToByte(hex.Substring(i, 2), 16);
}
return bytes;
}
Manu thanks to all for your help.
Manu 感谢大家的帮助。
回答by Micah Osborne
private static string HashHmac(string message, string secret)
{
Encoding encoding = Encoding.UTF8;
using (HMACSHA512 hmac = new HMACSHA512(encoding.GetBytes(secret)))
{
var msg = encoding.GetBytes(message);
var hash = hmac.ComputeHash(msg);
return BitConverter.ToString(hash).ToLower().Replace("-", string.Empty);
}
}
