SHA1 Hash for Unicode string

SHA1Util.cs

//Forked from kristopherjohnson/SHA1Util.cs gist
using System.Security.Cryptography;
using System.Text;

namespace Snippets
{
	public static class SHA1Util
	{
		/// <summary>
		/// Compute hash for string encoded as UTF8, return as base64 encoded string
		/// </summary>
		/// <param name="s">String to be hashed</param>
		/// <returns>Base64 encoded string</returns>
		public static string HashAsBase64(string s)
		{
			byte[] hashBytes = GetSHA1HashBytes(s);

			return System.Convert.ToBase64String(hashBytes);
		}

		/// <summary>
		/// Compute hash for string encoded as UTF8, return as hexadecimal string sequence
		/// </summary>
		/// <param name="s">String to be hashed</param>
		/// <returns>40-character hex string</returns>
		public static string HashAsHex(string s)
		{
			byte[] hashBytes = GetSHA1HashBytes(s);

			var sb = new StringBuilder();
			foreach (byte b in hashBytes)
			{
				var hex = b.ToString("x2");
				sb.Append(hex);
			}

			return sb.ToString();
		}

		private static byte[] GetSHA1HashBytes(string s) {
			return GetSHA1HashBytes(s, Encoding.UTF8);
		}

		private static byte[] GetSHA1HashBytes(string s, Encoding e)
		{
			byte[] bytes = e.GetBytes(s);

			var sha1 = SHA1.Create();
			return sha1.ComputeHash(bytes);
		}
	}
}