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));