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MD5SUM FOR C#

, 5 Jan 2005 52.7K 14
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How to compute the same hash as MD5SUM does (HEX).

Reason For This Howto

As you may know the MD5CryptoService, which the .NET Framework uses, doesn't create an md5 sum's string. So you only have the pure byte[] which isn't that useful if you want to use it in a database or on your Web Server to compare the sum with your file's sum! So, if many people have no idea how to get their sum into the right way, here's my howto to create the same sums like "md5sum" does:

Code

This is the second version with the Hex-bug fixed.

using System.Security.Cryptography;
.....
.....
string MD5SUM(byte[] FileOrText) //Output: String<-> Input: Byte[] //
{
return BitConverter.ToString(new 
    MD5CryptoServiceProvider().ComputeHash(FileOrText)).Replace("-","").ToLower();
} 

// Quite simple isn't it? I hope you enjoyed this tiny article and 
//I hope I could help ya! //

You can use this example of course for SHA1 as well, just change the MD5CryptoServiceProvider to SHA1CryptoServiceProvider.

License

This article has no explicit license attached to it but may contain usage terms in the article text or the download files themselves. If in doubt please contact the author via the discussion board below.

A list of licenses authors might use can be found here

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About the Author

Max Gattringer
Austria Austria
I am Max Gattringer an Austrian student - I've got a passion for programming C#, cryptograpy and nearly everything concerning PCs Big Grin | :-D

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Comments and Discussions

 
GeneralThis is great! Pin
mondokat3-Apr-07 10:27
membermondokat3-Apr-07 10:27 
GeneralMD5 Pin
ARROLLO2-Jan-06 14:12
memberARROLLO2-Jan-06 14:12 
GeneralPerformance Pin
axelriet2-Feb-05 16:03
memberaxelriet2-Feb-05 16:03 
GeneralYeah, you're right ;-) Pin
Anonymous7-Jan-05 12:36
sussAnonymous7-Jan-05 12:36 
GeneralAnother suggestion Pin
MrEyes5-Jan-05 23:09
memberMrEyes5-Jan-05 23:09 
GeneralJust two suggestions Pin
Dennis C. Dietrich5-Jan-05 10:58
memberDennis C. Dietrich5-Jan-05 10:58 
GeneralRe: Just two suggestions Pin
Robert Rohde5-Jan-05 20:09
memberRobert Rohde5-Jan-05 20:09 
GeneralRe: Just two suggestions Pin
Dennis C. Dietrich6-Jan-05 1:08
memberDennis C. Dietrich6-Jan-05 1:08 
GeneralRe: Just two suggestions Pin
Jeffrey Sax6-Jan-05 13:52
memberJeffrey Sax6-Jan-05 13:52 
GeneralRe: Just two suggestions Pin
Max Gattringer7-Jan-05 12:52
memberMax Gattringer7-Jan-05 12:52 

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