NetSkycn.Security/RSAProvider.cs

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using System;
using System.Collections.Generic;
using System.Text;
using System.Security.Cryptography;

namespace NetSkycn.Security
{
    /// <summary>
    /// 实现RSA加密和解密的类
    /// </summary>
    public sealed class RSAProvider
    {
        private RSAProvider()
        {
        }
        /// <summary>
        /// RSA加密
        /// </summary>
        /// <param name="encryptString">要加密的字符串</param>
        /// <returns></returns>
        public static string Encrypt(string encryptString)
        {
            if(string.IsNullOrEmpty(encryptString))
            {
                throw new ArgumentNullException("encryptString", "不能为空");
            }
            RSA rsa = RSA.Create();
            byte[] encryptByte=Encoding.UTF8.GetBytes(encryptString);
            byte[] decryptByte=rsa.EncryptValue(encryptByte);
            return Convert.ToBase64String(decryptByte);
        }
        /// <summary>
        /// RSA解密
        /// </summary>
        /// <param name="decryptString">要解密的字符串</param>
        /// <returns></returns>
        public static string Decrypt(string decryptString)
        {
            if (string.IsNullOrEmpty(decryptString))
            {
                throw new ArgumentNullException("decryptString", "不能为空");
            }
            byte[] decryptByte = Convert.FromBase64String(decryptString);
            RSA rsa = RSA.Create();
            byte[] encryptByte = rsa.DecryptValue(decryptByte);
            return Encoding.UTF8.GetString(encryptByte);
        }
    }
}