小编kal*_*shi的帖子

我盯着这看了很长一段时间,感谢MSDN文档我无法弄清楚到底发生了什么.基本上我正在将光盘中的PF​​X文件加载到a中,X509Certificate2并尝试使用公钥加密字符串并使用私钥解密.

为什么我感到困惑:加密/解密在我将引用传递给RSACryptoServiceProvider自身时起作用:

byte[] ed1 = EncryptRSA("foo1", x.PublicKey.Key as RSACryptoServiceProvider);
string foo1 = DecryptRSA(ed1, x.PrivateKey as RSACryptoServiceProvider);

但如果出口和传递RSAParameter:

byte[] ed = EncryptRSA("foo", (x.PublicKey.Key as RSACryptoServiceProvider).ExportParameters(false));
string foo = DecryptRSA(ed, (x.PrivateKey as RSACryptoServiceProvider).ExportParameters(true));

...它会抛出"密钥无法在指定状态下使用".尝试将私钥导出到的异常RSAParameter.请注意,生成PFX的证书标记为可导出(即我在创建证书时使用了pe标志).知道导致异常的是什么吗？

 static void Main(string[] args)
    {
        X509Certificate2 x = new X509Certificate2(@"C:\temp\certs\1\test.pfx", "test");
        x.FriendlyName = "My test Cert";

        X509Store store = new X509Store(StoreName.My, StoreLocation.LocalMachine);
        store.Open(OpenFlags.ReadWrite);
        try
        {
            store.Add(x);
        }
        finally
        {
            store.Close();
        }

        byte[] ed1 = EncryptRSA("foo1", x.PublicKey.Key as RSACryptoServiceProvider); …

我必须加密,存储然后解密大文件.这样做的最佳方式是什么？我听说RSA加密很昂贵,建议使用RSA加密AES密钥,然后使用AES密钥加密大文件.任何带有示例的建议都会很棒.

class Parent{
   public string Name{ get; set; }
}

class Child :Parent{
   public string  address{ get; set; }
}

[TestClass]
class TestClass{
   [TestMethod]
   public void TestMethod()
   {
      var c = new Fakes.Child();
      c.addressGet = "foo"; // I can see that
      c.NameGet = "bar"; // This DOES NOT exists
   }
}

如何在上面的代码示例中设置"名称"？

我正在尝试最基本的事情 - 使用公钥加密数据并使用私钥解密:

    X509Certificate2 cert = new X509Certificate2(@"c:\temp\CERT\mycert.pfx", "test1");

    RSACryptoServiceProvider privateKey = cert.PrivateKey as RSACryptoServiceProvider;
    RSACryptoServiceProvider publicKey = cert.PublicKey.Key as RSACryptoServiceProvider;

    UnicodeEncoding bytConvertor = new UnicodeEncoding();
    byte[] plainData = bytConvertor.GetBytes("Sample data");

    byte[] enData = publicKey.Encrypt(plainData, true); 
    Console.WriteLine("Encrypted Output: {0}", bytConvertor.GetString(enData));

    byte[] deData = privateKey.Decrypt(enData, true); 
    Console.WriteLine("Decrypted Output: {0}", bytConvertor.GetString(deData));

但是最后一行privateKey.Decrypt(...)抛出以下异常:

System.Security.Cryptography.CryptographicException未处理
Message = Bad Key.

Source=mscorlib   StackTrace:
   at System.Security.Cryptography.CryptographicException.ThrowCryptographicException(Int32 hr)
   at System.Security.Cryptography.RSACryptoServiceProvider.DecryptKey(SafeKeyHandle
         pKeyContext, Byte[] pbEncryptedKey, Int32 cbEncryptedKey, Boolean
         fOAEP, ObjectHandleOnStack ohRetDecryptedKey)
   at System.Security.Cryptography.RSACryptoServiceProvider.Decrypt(Byte[]
         rgb, Boolean fOAEP)
   at ConsoleApplication4.Program.Main(String[] args) in …

Run Code Online (Sandbox Code Playgroud)

我正在尝试使用更大的块大小进行AES加密:

private static void EncryptFile(string inFile, RSACryptoServiceProvider rsaPublicKey)
{
    using (AesCryptoServiceProvider aes = new AesCryptoServiceProvider())
    {
        // Create instance of AesManaged for
        // symetric encryption of the data.
        aes.KeySize = 256;

        // Allocating 64K
        aes.BlockSize = 8 * 1024 * 64; 
    }
}

并达到以下例外:

System.Security.Cryptography.CryptographicException未处理
Message =指定的块大小对此算法无效.
Source = mscorlib StackTrace:位于C:\ Projects\ConsoleApplication4\Program.cs中的ConsoleApplication4.Program.EncryptFile(String inFile,RSACryptoServiceProvider rsaPublicKey)中的System.Security.Cryptography.SymmetricAlgorithm.set_BlockSize(Int32值):第117行

我肯定错过了一些有关任何线索,任何线索？