C# -- RSA加密与解密

1. RSA加密与解密 -- 使用公钥加密、私钥解密

    public class RSATool{public string Encrypt(string strText, string strPublicKey){RSACryptoServiceProvider rsa = new RSACryptoServiceProvider();rsa.FromXmlString(strPublicKey);byte[] byteText = Encoding.UTF8.GetBytes(strText);byte[] byteEntry = rsa.Encrypt(byteText, false);return Convert.ToBase64String(byteEntry);}public string Decrypt(string strEntryText,string strPrivateKey){RSACryptoServiceProvider rsa = new RSACryptoServiceProvider();rsa.FromXmlString(strPrivateKey);byte[] byteEntry = Convert.FromBase64String(strEntryText);byte[] byteText = rsa.Decrypt(byteEntry, false);return Encoding.UTF8.GetString(byteText);}public Dictionary<string,string> GetKey(){Dictionary<string, string> dictKey = new Dictionary<string, string>();RSACryptoServiceProvider rsa = new RSACryptoServiceProvider();dictKey.Add("PublicKey", rsa.ToXmlString(false));dictKey.Add("PrivateKey", rsa.ToXmlString(true));return dictKey;}}

测试：

            RSATool myRSA = new RSATool();Dictionary<string, string> dictK = new Dictionary<string, string>();dictK = myRSA.GetKey();string strText = "123456";Console.WriteLine("要加密的字符串是：{0}", strText);string str1 = myRSA.Encrypt("123456", dictK["PublicKey"]);Console.WriteLine("加密后的字符串：{0}", str1);string str2 = myRSA.Decrypt(str1, dictK["PrivateKey"]);Console.WriteLine("解密后的字符串：{0}", str2);

View Code

2. RSA加密与解密 -- 使用同一个密钥容器进行加密与解密

    public class RSAToolX{public string Encrypt(string strText){CspParameters CSApars = new CspParameters();CSApars.KeyContainerName = "Test001";RSACryptoServiceProvider rsa = new RSACryptoServiceProvider(CSApars);byte[] byteText = Encoding.UTF8.GetBytes(strText);byte[] byteEntry = rsa.Encrypt(byteText, false);return Convert.ToBase64String(byteEntry);}public string Decrypt(string strEntryText){CspParameters CSApars = new CspParameters();CSApars.KeyContainerName = "Test001";RSACryptoServiceProvider rsa = new RSACryptoServiceProvider(CSApars);byte[] byteEntry = Convert.FromBase64String(strEntryText);byte[] byteText = rsa.Decrypt(byteEntry, false);return Encoding.UTF8.GetString(byteText);}}

测试：

            RSAToolX myRSA = new RSAToolX();string strText = "123456";Console.WriteLine("要加密的字符串是：{0}", strText);string str1 = myRSA.Encrypt("123456");Console.WriteLine("加密后的字符串：{0}", str1);string str2 = myRSA.Decrypt(str1);Console.WriteLine("解密后的字符串：{0}", str2);