.NET下的加密解密大全（3）：非对称加密

本博文列出了.NET下常用的非对称加密算法，并将它们制作成小DEMO，希望能对大家有所帮助。

RSA
[csharp]
static string EnRSA(string data,string publickey)
{
    RSACryptoServiceProvider rsa = new RSACryptoServiceProvider();
    byte[] cipherbytes;
    rsa.FromXmlString(publickey);
    cipherbytes = rsa.Encrypt(Encoding.UTF8.GetBytes(data), false);
    return Convert.ToBase64String(cipherbytes);

}

static string DeRSA(string data,string privatekey)
{

    RSACryptoServiceProvider rsa = new RSACryptoServiceProvider();
    byte[] cipherbytes; rsa.FromXmlString(privatekey);
    cipherbytes = rsa.Decrypt(Convert.FromBase64String(data), false);
    return Encoding.UTF8.GetString(cipherbytes);
}

调用代码
[csharp]
Console.WriteLine("RSA非对称加密");
Byte[] iv = CreateKey(16);
Byte[] key = CreateKey(27);
string inputRSA_1 = inputString();
RSA rsa = RSA.Create();

string enData = EnRSA(inputRSA_1,rsa.ToXmlString(false));

Console.WriteLine("加密后的数据：{0}", enData);
Console.WriteLine("解密后的数据:{0}", DeRSA(enData,rsa.ToXmlString(true)));

DSA（数字签名）
[csharp]
static string EnDSA(string data,string publickey)
   {
       DSA dsa = DSA.Create();
       Byte[] result;
       dsa.FromXmlString(publickey);
       SHA1 sha1 = SHA1.Create();
       result = dsa.CreateSignature(sha1.ComputeHash(Convert.FromBase64String(data)));
       return Convert.ToBase64String(result);


   }

   static bool DeDSA(string data,string privatekey,string originalData)
   {
       //Byte[] result;
       DSA dsa = DSA.Create();
       dsa.FromXmlString(privatekey);
       SHA1 sha1 = SHA1.Create();
       return dsa.VerifySignature(sha1.ComputeHash(Convert.FromBase64String(originalData)),Convert.FromBase64String(data));

   }
调用代码
[csharp]
Console.WriteLine("DSA数字签名");
string inputDSA_1 = inputString();
string inputDSA_2 = inputDSA_1;
DSA dsa = DSA.Create();
string enData = EnDSA(inputDSA_1, dsa.ToXmlString(true));

Console.WriteLine("加密后的数据：{0}", enData);
Console.WriteLine("解密后的数据:{0}", DeDSA(enData, dsa.ToXmlString(false), inputDSA_2));

ECDsa
[csharp]

static string EnECDsa(string data, CngKey key)
{
     ECDsaCng ecdsa = new ECDsaCng(key);


     SHA1 sha1 = SHA1.Create();
     byte[] result;

     result = ecdsa.SignHash(sha1.ComputeHash(Convert.FromBase64String(data)));

     return Convert.ToBase64String(result);

}

static bool DeECDsa(string data, CngKey key,string originalData)
{
     ECDsaCng ecdsa = new ECDsaCng(key);
     SHA1 sha1 = SHA1.Create();

     return ecdsa.VerifyHash(sha1.ComputeHash(Convert.FromBase64String(originalData)), Convert.FromBase64String(data));
}

调用代码
[csharp]
Console.WriteLine("ECDsa数字签名");
string inputDSA_1 = inputString();
string inputDSA_2 = inputDSA_1;
CngKey key = CngKey.Create(CngAlgorithm.ECDsaP256);

string enData = EnECDsa(inputDSA_1, key);

Console.WriteLine("加密后的数据：{0}", enData);
Console.WriteLine("解密后的数据:{0}", DeECDsa(enData, key, inputDSA_2));

摘自 GhostHouse

补充：综合编程 , 安全编程 ,