需要以下SQL HashBytes函数的C#等效项 [英] Need C# equivalent for the below SQL HashBytes function

问题描述

我已经在sql中使用以下函数创建了哈希值

I have created hash value using below function in sql

SQL查询

Select hashbytes('MD5', PNumber+CONVERT(VARCHAR(50),cast(datestamp as  binary),1))   
From dbo.Events

现在，我需要获取等效的C#函数以获取哈希值并将其传递给存储过程.

Now I need to get the equivalent C# function in order to get the hash value and pass it to a stored procedure.

我正在使用以下代码来获取c#等效项.但是值不匹配

I am using below code to get the c# equivalent. But values are not matching

C#代码

var strDate = policyEventFromQueue.DateStamp.ToString();
var binaryvalue = Encoding.Unicode.GetBytes(strDate);
var hashkey = GetMD5Hash(PNumber + binaryvalue);

public static byte[] GetMD5Hash(string input)
{
    System.Security.Cryptography.MD5CryptoServiceProvider x = new System.Security.Cryptography.MD5CryptoServiceProvider();
    byte[] bs = System.Text.Encoding.Unicode.GetBytes(input);

    bs = x.ComputeHash(bs);
    return bs;
}

以下是测试结果:

从SQL Server:

From SQL Server:

PNumber ='4272535529'
DateStamp ='2016-06-30 12:19:35.257961'

HashValue : 0x104E09499B76CB59420AEEEDBBE187F8

在C#中，我从数据库字段值中获取值，如下所示:

In C# I am getting the value from DB Field value as below

[0]: 16
[1]: 78
[2]: 9
[3]: 73
[4]: 155
[5]: 118
[6]: 203
[7]: 89
[8]: 66
[9]: 10
[10]: 238
[11]: 237
[12]: 187
[13]: 225
[14]: 135
[15]: 248

从C#GetMD5Hash函数中，我得到如下值

From C# GetMD5Hash Function i am getting value as below

[0]: 30
[1]: 153
[2]: 105
[3]: 203
[4]: 34
[5]: 124
[6]: 20
[7]: 12
[8]: 207
[9]: 113
[10]: 210
[11]: 144
[12]: 18
[13]: 145
[14]: 22
[15]: 36

任何建议将不胜感激.

推荐答案

在C#中，看来DateTime ToString()的格式更像这样:

In c# it looks like the format for a DateTime ToString() is more like this:

DateTime.Now.ToString()
//--------
"8/3/2016 4:11:14 PM"

我认为您正在对两个不同的字符串进行哈希处理.为了使哈希值匹配，您需要在计算哈希值之前将日期格式设置为相同.

I think you're hashing two different strings. For the hashes to match you'll need to format the dates the same before computing the hash value.

在sql server上，您看起来也像在散列以下内容:

Also it looks like on sql server you're hashing something like:

select '12313135' + CONVERT(VARCHAR(50),cast(sysdatetime() as  binary),1)
//------------
123131350x077B7127E688B23B0B000000000000000000000000000000

另一个问题可能是:

var binaryvalue = Encoding.Unicode.GetBytes(DateTime.Now.ToString());
var hashkey = "123456" + binaryvalue;
Console.WriteLine(hashkey)
//----------
123456System.Byte[]

您在字符串和字节之间的转换已关闭.

your conversions between strings and bytes is off.

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