Convert SHA Hash Computation in Python to C#

Question

Can someone please help me convert the following two lines of python to C#.

hash = hmac.new(secret, data, digestmod = hashlib.sha1)
key = hash.hexdigest()[:8]

The rest looks like this if you're intersted:

#!/usr/bin/env python

import hmac
import hashlib


secret = 'mySecret'     
data = 'myData'

hash = hmac.new(secret, data, digestmod = hashlib.sha1)
key = hash.hexdigest()[:8]

print key

Thanks

Darin Dimitrov · Accepted Answer · 2010-10-10 09:07:50Z

7

You could use the HMACSHA1 class to compute the hash:

class Program
{
    static void Main()
    {
        var secret = "secret";
        var data = "data";
        var hmac = new HMACSHA1(Encoding.UTF8.GetBytes(secret));
        var hash = hmac.ComputeHash(Encoding.UTF8.GetBytes(data));
        Console.WriteLine(BitConverter.ToString(hash));
    }
}

edited Oct 10, 2010 at 9:07

answered Oct 10, 2010 at 9:01

Darin Dimitrov

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3 Comments

Sara Over a year ago

And to print the key, I added: string key = string.Empty; foreach (byte b in hash) { key += b.ToString("X2"); } MessageBox.Show(key);

Darin Dimitrov Over a year ago

Or you could BitConverter.ToString(hash).Replace("-", string.Empty).

José Mancharo Over a year ago

You can add a using statment to the HMACSHA1 instance like so to dispose of it properly: using var hmac = new HMACSHA1(Encoding.UTF8.GetBytes(secret)); (C# 8 or later. In older versions use using block). This will ensure that the dispose method is called on the HMACSHA1 instance.

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