How to write the follow simple sha1Hex() in C#(.net) ?


How to write the follow simple sha1Hex(sbyte[] data, string key) in C#(.net) ?
下面是Java的代码,c#要怎么写这个简单的算法,要带key的。


 public static string sha1Hex(sbyte[] data, string key)
        {
            sbyte[] keyBytes = key.GetBytes();
            SecretKeySpec signingKey = new SecretKeySpec(keyBytes, "HmacSHA1");
            Mac mac;
            StringBuilder sb = new StringBuilder();
            try
            {
                mac = Mac.getInstance("HmacSHA1");
                mac.init(signingKey);
                sbyte[] rawHmac = mac.doFinal(data);

                foreach (sbyte b in rawHmac)
                {
                    sb.Append(byteToHexString(b));
                }
            }
            catch (Exception)
            {

            }
            return sb.ToString();
        }

hex c# .net sha1 hash

真希的五月 9 years, 2 months ago

解说

可以用 HMAC.Create(hmacname) 来创建 HMAC 实例。这里 hmacname 包括如下一些(但不完全)

  • hmacmd5

  • hmacsha1

  • hmacsha256

  • hmacsha384

  • hmacsha512

之后设置 HMAC 实例的 Key hamc.Key = ....
之后再计算得到结果就好 hmac.ComputeHash(data) ,这里 data 可以是个 byte[] 也可以是 Stream

把字符串变成 byte[] 可以用 Encoding.GetBytes() 实例方法,常用的 Encoding 有

  • Encoding.Default ,系统默认的编码,比如中文 Windows 是 GBK

  • Encoding.UTF8

最后需要把结果 byte[] 变成十六进制, BitConvert.ToString(byte[]) 可以做到,不过得到的是像这样的: 12-34-56-78-AB-CD ,如果不需要间隔符可以把 - 号替换掉。

示例

https://dotnetfiddle.net/su16Ve


 public static string Sha1Hex(byte[] data, string key) {
        HMAC hmac = HMAC.Create("hmacsha1");
        hmac.Key = Encoding.UTF8.GetBytes(key);
        var code = hmac.ComputeHash(data);
        return BitConverter.ToString(code).Replace("-", string.Empty);
    }

qopx123 answered 9 years, 2 months ago

http://stackoverflow.com/a/6533030/2586541



 using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Security.Cryptography;
using System.IO;

namespace ConsoleApplication1
{
    class Program
    {
        public static string Encode(string input, byte[] key)
        {
            HMACSHA1 myhmacsha1 = new HMACSHA1(key);
            byte[] byteArray = Encoding.ASCII.GetBytes(input);
            MemoryStream stream = new MemoryStream(byteArray);
            return myhmacsha1.ComputeHash(stream).Aggregate("", (s, e) => s + String.Format("{0:x2}",e), s => s );
        }


        static void Main(string[] args)
        {
            byte[] key = Encoding.ASCII.GetBytes("abcdefghijklmnopqrstuvwxyz");
            string input = "";
            foreach (string s in new string[] { "Marry", " had", " a", " little", " lamb" })
            {
                input += s;
                System.Console.WriteLine( Encode(input, key) );
            }
            return;
        }
    }
}

星期一的马甲 answered 9 years, 2 months ago

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