Computes the MD5 hash of a file using the data array - CSharp System.Security.Cryptography

CSharp examples for System.Security.Cryptography:MD5

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Description

Computes the MD5 hash of a file using the data array

Demo Code


using System.Net;
using System.Security.Cryptography;
using System.Text;
using System.IO;/*from  w  w w  . j  a v  a 2 s  . c  o m*/
using System.Configuration;
using System.Data;
using System;

public class Main{
        /// <summary>
    /// Computes the MD5 hash of a file using the data array
    /// </summary>
    /// <param name="data">the array of data</param>
    /// <returns>the string form of the calculated MD5 hash</returns>
    public static string ComputeMD5(byte[] data)
    {
        MD5CryptoServiceProvider md5 = new MD5CryptoServiceProvider();
        StringBuilder buff = new StringBuilder();
        
        try
        {
            byte[] md5Hash = md5.ComputeHash(data);
            foreach (byte hashByte in md5Hash)
            {
                buff.Append(String.Format("{0:X1}", hashByte));
            }

            return buff.ToString();
        }
        catch (Exception ex)
        {
            throw new Exception("Exception thrown computing MD5 hash using the data array", ex);
        }

   }
        /// <summary>
    /// Computes the MD5 hash of a file using the file path
    /// </summary>
    /// <param name="filePath">the physical path of the file on the ESS</param>
    /// <returns>the string form of the calculated MD5 hash</returns>
    public static string ComputeMD5(string filePath)
    {
        MD5CryptoServiceProvider md5 = new MD5CryptoServiceProvider();
        StringBuilder buff = new StringBuilder();
        FileStream fs = null;

        try
        {
            fs = new FileStream(filePath, FileMode.Open, FileAccess.Read);
            byte[] md5Hash = md5.ComputeHash(fs);

            foreach (byte hashByte in md5Hash)
            {
                buff.Append(String.Format("{0:X1}", hashByte));
            }

            return buff.ToString();
        }
        catch (Exception ex)
        {
            throw new Exception("Exception thrown computing MD5 hash using the file path", ex);
        }

        finally
        {
            fs.Close();
        }

    }
}

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