Php SHA256 is different from C#

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I am trying to hash a byte array in PHP but it is different from C# function ComputeHash

Input byte array:

10 241 161 2 121 5 228 157 20 19 2 7

Expected result (From C#):

91 110 159 77 220 148 223 78 194 210 64 197 147 127 162 229 47 142 1 130 47 252 238 232 126 74 108 91 241 253 242 31
Hash value: 5B6E9F4DDC94DF4EC2D240C5937FA2E52F8E01822FFCEEE87E4A6C5BF1FDF21F

Result from PHP:

398d3d7037eff6ed07ce7d39799a1c9abc240b59a07f79e64acfd36cbcfee422

What I have tried:

C# code:

byte[] byteArray = new byte[] {10, 241, 161, 2, 121, 5, 228, 157, 20, 19, 2, 7};
byte[] hashedBytes = algorithm.ComputeHash(byteArray);

PHP Code:

$arr = array(10,241,161,2,121,5,228,157,20,19,2,7);
$original = implode("", $arr);
hash('sha256', $original);

Posted 6-Feb-19 22:35pm

Zhivko Kabaivanov

Updated 6-Feb-19 23:35pm

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Wastedtalent · Accepted Answer · 2019-02-06T23:35:00

This is because you're not hashing the same thing, in PHP you're turning it into a string with implode. For example, if you also turn it into a string in c# you get the same result as in php:

using System;
using System.Security.Cryptography;	
using System.Text;

public class Program
{
	public static void Main()
	{
		 using (SHA256 sha256Hash = SHA256.Create())
        {
		string str = "1024116121215228157201927";
		byte[] hashedBytes = sha256Hash.ComputeHash(Encoding.UTF8.GetBytes(str));
			 
			 for (int i = 0; i < hashedBytes.Length; i++)
        {
            Console.Write(hashedBytes[i].ToString("x2"));
        }
		 }
	}
}

And

<?php

$arr = array(10,241,161,2,121,5,228,157,20,19,2,7);
$original = implode("", $arr);
echo(hash('sha256', $original));

?>

Both give

6d615f5fd3e0a50c05520bccdb048f6fa4e2ae90788bda2379364d6cd1dcc707