Tuesday, March 24, 2009

How to generate the SHA-1 hash of a string using C#

The namespace System.Security.Cryptography contains classes for working with cryptography such as hashing. Within this namespace you will find the SHA1Managed class which we can utilize to generate the SHA-1 hash of a string. Below you will find a helper method using this class:

public static string GetSha1(string value)
 var data = Encoding.ASCII.GetBytes(value);
 var hashData = new SHA1Managed().ComputeHash(data);

 var hash = string.Empty;

 foreach (var b in hashData)
  hash += b.ToString("X2");

 return hash;