String to UTF8 to SHA256 to BASE64

Question

In C# I have the following code:

public static string GetHashCode(string p)
    {
        var a = new SHA256Managed();
        return Convert.ToBase64String(a.ComputeHash(new System.Text.UTF8Encoding().GetBytes(p)));
    }

And I have to achieve the same thing in Javascript, I was trying the following but it gives different result:

btoa((CryptoJS.SHA256(this.toUTF8Array(this.settingsService.Password)).toString(CryptoJS.enc.Hex)));

What am I supposed to do, what is wrong?

Example output for string 'aaa' for: C#:1f9e1d76685d765aa3a6ff85dced2f0a04f612536df52696684aaa67787e6cdd Js:NGVhNWM1MDhhNjU2NmU3NjI0MDU0M2Y4ZmViMDZmZDQ1Nzc3N2JlMzk1NDljNDAxNjQzNmFmZGE2NWQyMzMwZQ==

Instead of one liners, do each step seperately so you can see exactly where the difference is. — Crowcoder, Jun 26 '17 at 09:39
i did it step by step and there is difference in computehash() part — , Jun 26 '17 at 09:58
Possibly have a look at this as well: https://stackoverflow.com/questions/10559203/sha-256-hashes-different-between-c-sharp-and-javascript — Subbu, Jun 26 '17 at 10:39

score 3 · Accepted Answer · answered Jun 26 '17 at 11:48

I'm not that familiar with CryptoJS but I think you are outputting hex which is not the same as base64.

This generates the same result as C# see fiddle

var utf8arr = CryptoJS.enc.Utf8.parse("apassword");
var hash = CryptoJS.SHA256(utf8arr);
var base64 = CryptoJS.enc.Base64.stringify(hash);
console.log(base64);

String to UTF8 to SHA256 to BASE64

1 Answers1