Csharp/C Sharp by API/System.Security.Cryptography/HashAlgorithm

HashAlgorithm.ComputeHash

<source lang="csharp"> using System; using System.Text; using System.Security.Cryptography; class MainClass {

   public static void Main(string[] args) {
       HashAlgorithm hashAlg = null;
       hashAlg = new SHA1Managed();
       using (hashAlg) {
           byte[] pwordData = Encoding.Default.GetBytes(args[1]);
           byte[] hash = hashAlg.ruputeHash(pwordData);
           Console.WriteLine(BitConverter.ToString(hash));
       }
   }

}

 </source>

HashAlgorithm.Create()

<source lang="csharp"> using System; using System.IO; using System.Security.Cryptography; static class MainClass {

   static void Main(string[] args)
   {
       // Create the hashing object.
       using (HashAlgorithm hashAlg = HashAlgorithm.Create())
       {
           using (FileStream fsA = new FileStream("c:\\test.txt", FileMode.Open),
               fsB = new FileStream("c:\\test1.txt", FileMode.Open)){
               // Calculate the hash for the files.
               byte[] hashBytesA = hashAlg.ruputeHash(fsA);
               byte[] hashBytesB = hashAlg.ruputeHash(fsB);
               // Compare the hashes.
               if (BitConverter.ToString(hashBytesA) == BitConverter.ToString(hashBytesB))
               {
                   Console.WriteLine("Files match.");
               } else {
                   Console.WriteLine("No match.");
               }
           }
       }
   }

}

 </source>