Util/CryptProtection/DataProtection.cs

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using System;
using System.Collections.Generic;
using System.Linq;
using System.Runtime.InteropServices;
using System.Security;
using System.Text;

namespace Util.CryptProtection
{
    /// <summary>
    /// Crypt 加密解密
    /// </summary>
    [Serializable()]
    public sealed class DataProtection
    {
        [Flags()]
        public enum CryptProtectPromptFlags
        {
            CRYPTPROTECT_PROMPT_ON_UNPROTECT = 0x01,
            CRYPTPROTECT_PROMPT_ON_PROTECT = 0x02,
            CRYPTPROTECT_PROMPT_RESERVED = 0x04,
            CRYPTPROTECT_PROMPT_STRONG = 0x08,
            CRYPTPROTECT_PROMPT_REQUIRE_STRONG = 0x10
        }

        [Flags()]
        public enum CryptProtectDataFlags
        {
            CRYPTPROTECT_UI_FORBIDDEN = 0x01,
            CRYPTPROTECT_LOCAL_MACHINE = 0x04,
            CRYPTPROTECT_CRED_SYNC = 0x08,
            CRYPTPROTECT_AUDIT = 0x10,
            CRYPTPROTECT_NO_RECOVERY = 0x20,
            CRYPTPROTECT_VERIFY_PROTECTION = 0x40,
            CRYPTPROTECT_CRED_REGENERATE = 0x80
        }

        #region 加密数据
        public static string ProtectData(string data, string name)
        {
            return ProtectData(data, name,
            CryptProtectDataFlags.CRYPTPROTECT_UI_FORBIDDEN | CryptProtectDataFlags.CRYPTPROTECT_LOCAL_MACHINE);
        }

        public static byte[] ProtectData(byte[] data, string name)
        {
            return ProtectData(data, name,
            CryptProtectDataFlags.CRYPTPROTECT_UI_FORBIDDEN | CryptProtectDataFlags.CRYPTPROTECT_LOCAL_MACHINE);
        }

        public static string ProtectData(string data, string name, CryptProtectDataFlags flags)
        {
            byte[] dataIn = Encoding.Unicode.GetBytes(data);
            byte[] dataOut = ProtectData(dataIn, name, flags);

            if (dataOut != null)
                return (Convert.ToBase64String(dataOut));
            else
                return null;
        }