RSA加密(跨平台通用的)

 1 　　　　 /// <summary>

 2         /// RSA加密

 3         /// </summary>

 4         /// <param name="strPublickey"></param>

 5         /// <param name="content"></param>

 6         /// <returns></returns>

 7         public string RsaEncrypt(string strPublickey, string content)

 8         {

 9             var rsa = new RSACryptoServiceProvider();

10             var param = new RSAParameters();

11             byte[] bdata = GetBytes("65537");

12             param.Exponent = bdata;

13             param.Modulus = GetBytes(strPublickey);

14             rsa.ImportParameters(param);

15

16             byte[] cipherbytes = rsa.Encrypt(Encoding.UTF8.GetBytes(content),false);

17

18             return BitConverter.ToString(cipherbytes).Replace("-", string.Empty);

19         }

20

21         public byte[] GetBytes(String num)

22         {

23             BigInteger n = new BigInteger(num, 10);

24             String s = n.ToString(2);

25             if (s.Length % 8 > 0)

26             {

27                 s = new String(‘0‘, 8 - s.Length % 8) + s;

28             }

29             byte[] data = new byte[s.Length / 8];

30             String ocetstr;

31             for (int i = 0; i < data.Length; i++)

32             {

33                 ocetstr = s.Substring(8 * i, 8);

34                 data[i] = Convert.ToByte(ocetstr, 2);

35             }

36             return data;

37         }

　　　　　　 调用方式

　　　　　　 var result = new BigInteger(pubkey, 16);

           String sp = RsaEncrypt(string.Format("{0}", result), message);

　　　　　　 BigInteger下载地址

　　　　　　 http://www.codeproject.com/Articles/2728/C-BigInteger-Class

RSA加密(跨平台通用的)