public static class CryptographyExtensions
{
	/// <summary>
	/// 	Calculates the MD5 hash for the given string.
	/// </summary>
	/// <returns>A 32 char long MD5 hash.</returns>
	public static string GetHashMd5(this string input)
	{
		return ComputeHash(input, new MD5CryptoServiceProvider());
	}

	/// <summary>
	/// 	Calculates the SHA-1 hash for the given string.
	/// </summary>
	/// <returns>A 40 char long SHA-1 hash.</returns>
	public static string GetHashSha1(this string input)
	{
		return ComputeHash(input, new SHA1Managed());
	}

	/// <summary>
	/// 	Calculates the SHA-256 hash for the given string.
	/// </summary>
	/// <returns>A 64 char long SHA-256 hash.</returns>
	public static string GetHashSha256(this string input)
	{
		return ComputeHash(input, new SHA256Managed());
	}

	/// <summary>
	/// 	Calculates the SHA-384 hash for the given string.
	/// </summary>
	/// <returns>A 96 char long SHA-384 hash.</returns>
	public static string GetHashSha384(this string input)
	{
		return ComputeHash(input, new SHA384Managed());
	}

	/// <summary>
	/// 	Calculates the SHA-512 hash for the given string.
	/// </summary>
	/// <returns>A 128 char long SHA-512 hash.</returns>
	public static string GetHashSha512(this string input)
	{
		return ComputeHash(input, new SHA512Managed());
	}

	public static string ComputeHash(string input, HashAlgorithm hashProvider)
	{
		if (input == null)
		{
			throw new ArgumentNullException("input");
		}

		if (hashProvider == null)
		{
			throw new ArgumentNullException("hashProvider");
		}

		var inputBytes = Encoding.UTF8.GetBytes(input);
		var hashBytes = hashProvider.ComputeHash(inputBytes);
		var hash = BitConverter.ToString(hashBytes).Replace("-", string.Empty);

		return hash;
	}
}