System.Web.Security.SqlMembershipProvider.EncodePassword C# (CSharp) Method

		string EncodePassword (string password, MembershipPasswordFormat passwordFormat, string salt)
		{
			byte [] password_bytes;
			byte [] salt_bytes;

			switch (passwordFormat) {
				case MembershipPasswordFormat.Clear:
					return password;
				case MembershipPasswordFormat.Hashed:
					password_bytes = Encoding.Unicode.GetBytes (password);
					salt_bytes = Convert.FromBase64String (salt);

					byte [] hashBytes = new byte [salt_bytes.Length + password_bytes.Length];

					Buffer.BlockCopy (salt_bytes, 0, hashBytes, 0, salt_bytes.Length);
					Buffer.BlockCopy (password_bytes, 0, hashBytes, salt_bytes.Length, password_bytes.Length);

					MembershipSection section = (MembershipSection) WebConfigurationManager.GetSection ("system.web/membership");
					string alg_type = section.HashAlgorithmType;
					if (alg_type.Length == 0) {
						alg_type = MachineKeySection.Config.Validation.ToString ();
#if NET_4_0
						// support new (4.0) custom algorithms
						if (alg_type.StartsWith ("alg:"))
							alg_type = alg_type.Substring (4);
#endif
					}
					using (HashAlgorithm hash = HashAlgorithm.Create (alg_type)) {
#if NET_4_0
						// for compatibility (with 2.0) we'll allow MD5 and SHA1 not to map to HMACMD5 and HMACSHA1
						// but that won't work with new (4.0) algorithms, like HMACSHA256|384|512 or custom, won't work without using the key
						KeyedHashAlgorithm kha = (hash as KeyedHashAlgorithm);
						if (kha != null)
							kha.Key = MachineKeySection.Config.GetValidationKey ();
#endif
						hash.TransformFinalBlock (hashBytes, 0, hashBytes.Length);
						return Convert.ToBase64String (hash.Hash);
					}
				case MembershipPasswordFormat.Encrypted:
					password_bytes = Encoding.Unicode.GetBytes (password);
					salt_bytes = Convert.FromBase64String (salt);

					byte [] buf = new byte [password_bytes.Length + salt_bytes.Length];

					Array.Copy (salt_bytes, 0, buf, 0, salt_bytes.Length);
					Array.Copy (password_bytes, 0, buf, salt_bytes.Length, password_bytes.Length);

					return Convert.ToBase64String (EncryptPassword (buf));
				default:
					/* not reached.. */
					return null;
			}
		}