Solved

How do i convert byte[] to a string

Posted on 2003-10-22
5
1,031 Views
Last Modified: 2010-04-16
I am trying to Hash a file via the MD5 crypt.
now i get the result in a byte[] how doi display this as a string in a textbox?

thanks and regards.

i got this thus far:
private void Form1_Load(object sender, System.EventArgs e)
            {
                  System.Security.Cryptography.MD5 md5 = new System.Security.Cryptography.MD5CryptoServiceProvider();
                  FileStream fs = new FileStream("book_01.jpg", FileMode.Open, FileAccess.Read, FileShare.Read);
                  byte[] result = md5.ComputeHash(fs);
                  
                  foreach(byte oneByte in result)
                        this.txtMD5.Text += oneByte.ToString();
                  
                  // txtMD5.Text = Convert.ToBase64String(result);



            }

running with md5sum, clearly i get this:
$ md5sum book_01.jpg
0fd5c55ffdf784e2596fbc0b892e3f96  book_01.jpg

the for each loop does this:
152131979525324713222689111188111374663150

the convert to base64 does this:
D9XFX/33hOJZb7wLiS4/lg==

0
Comment
Question by:weinrj
5 Comments
 

Expert Comment

by:GtG
ID: 9603004
I think this is what you are looking for:
Encoding.ASCII.GetString(byte[])

PS:you can change the encoding
0
 
LVL 19

Expert Comment

by:Desp
ID: 9604447
byte[] ByteArray = new byte[100];
..............
..............
string MyString= System.Text.Encoding.ASCII.GetString(ByteArray ,0,ByteArray.Length);//this will actually convert the byte to string
0
 
LVL 7

Expert Comment

by:psdavis
ID: 9606051
Actually, you look like you're done already.  The Base64 answer that you already posted is your best solution to store your MD5.  I guess it really depends on what you are wanting to do with the result.

> txtMD5.Text = Convert.ToBase64String(result);
> D9XFX/33hOJZb7wLiS4/lg==

Looks like you already have a handle on the answer.
0
 
LVL 2

Accepted Solution

by:
wellilein earned 125 total points
ID: 9606320
I think you want the for-loop to produce the same result as md5sum
md5sum outputs the hash in hexadecimal, your code does in decimal.
Have a look at it:
0F D5 C5 ...
15 213 197 ...
So what you need is a converter from decimal to hex. Try this:
public string toHex(byte b)
{
  char[] hex = "0123456789abcdef".ToCharArray();
  return hex[b/16].ToString() + hex[b%16].ToString();
}
and change your loop to
foreach(byte oneByte in result)
  this.txtMD5.Text += toHex(oneByte);
0
 

Author Comment

by:weinrj
ID: 9607792
Brilliant, thanks so much!
0

Featured Post

Free Tool: Postgres Monitoring System

A PHP and Perl based system to collect and display usage statistics from PostgreSQL databases.

One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Introduction This article series is supposed to shed some light on the use of IDisposable and objects that inherit from it. In essence, a more apt title for this article would be: using (IDisposable) {}. I’m just not sure how many people would ge…
Calculating holidays and working days is a function that is often needed yet it is not one found within the Framework. This article presents one approach to building a working-day calculator for use in .NET.
A short tutorial showing how to set up an email signature in Outlook on the Web (previously known as OWA). For free email signatures designs, visit https://www.mail-signatures.com/articles/signature-templates/?sts=6651 If you want to manage em…

820 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question