Cryptography/CryptoHelper.cs

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/*
 * Author: Kishore Reddy
 * Url: http://commonlibrarynet.codeplex.com/
 * Title: CommonLibrary.NET
 * Copyright: � 2009 Kishore Reddy
 * License: LGPL License
 * LicenseUrl: http://commonlibrarynet.codeplex.com/license
 * Description: A C# based .NET 3.5 Open-Source collection of reusable components.
 * Usage: Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
using System;
using System.Security.Cryptography;
using System.Text; 
using System.Configuration;

namespace ComLib.Cryptography
{

    /// <summary>
    /// Simple Cryptographic Services
    /// </summary>
    public class CryptographyUtils
    {
        /// <summary>
        /// Generates a cryptographic Hash Key for the provided text data.
        /// Basically a digital fingerprint
        /// </summary>
        /// <param name="dataToHash">text to hash</param>
        /// <param name="hashAlgorithm">e.g. new MD5CryptoServiceProvider();</param>
        /// <returns>Unique hash representing string</returns>
        public static string Encrypt(HashAlgorithm hashAlgorithm, String dataToHash)
        {
            String hexResult = "";
            string[] tabStringHex = new string[16];

            byte[] data = Encoding.ASCII.GetBytes(dataToHash);
            byte[] result = hashAlgorithm.ComputeHash(data);
            for (int i = 0; i < result.Length; i++)
            {
                tabStringHex[i] = (result[i]).ToString("x");
                hexResult += tabStringHex[i];
            }
            return hexResult;
        }


        /// <summary>
        /// Generates a cryptographic Hash Key for the provided text data.
        /// Basically a digital fingerprint
        /// </summary>
        /// <param name="hashAlgorithm">e.g. new MD5CryptoServiceProvider();</param>
        /// <param name="hashedText"></param>
        /// <param name="unhashedText"></param>
        /// <returns>Unique hash representing string</returns>
        public static bool IsHashMatch(HashAlgorithm hashAlgorithm, string hashedText, string unhashedText)
        {