C# 如何在Bouncy castle中加载PuTTYgen键

我在玩加密。我在用BouncyCastle加载键时遇到了麻烦。密钥由PuTTYgen（SSH-2 RSA 4096位）生成。是否有其他方法加载它

PuTTY-User-Key-File-2:ssh-rsa
加密：aes256 cbc
注释：rsa-key-20160508
公用电话：12

我得到：

BouncyCastle.Crypto.dll中发生“System.IO.IOException”类型的未处理异常
其他信息：意外的内容结束标记*“

添加： 我用“ssh-keygen-t rsa-b 4096”生成了一个新密钥，并尝试用pemreader加载它：

   const string pubkey = @"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";
    
   var pemReader = new Org.BouncyCastle.OpenSsl.PemReader(new StringReader(pubkey));
   // KeyParameter is still null
   var KeyParameter = (Org.BouncyCastle.Crypto.AsymmetricKeyParameter)pemReader.ReadObject();

添加：

我可以生成一个公钥，也可以加载一个未加密的私钥 （）

openssl genrsa-des3-out private.pem 4096

openssl rsa-in private.pem-outform pem-pubout-out public.pem

openssl rsa-in private.pem-out private_unencrypted.pem-outform pem

---

但是我无法加载加密的私钥…

PuTTY.ppk密钥格式是PuTTY专有的

我很确定Bouncy castle中不支持.ppk文件

---

您需要将密钥转换为OpenSSH格式。为此，请参阅。

使用openssl PEM，我能够使其正常工作。我将继续了解如何加载受保护的私钥

谢谢大家的意见

using System;
using System.IO;
using System.Text;
using Org.BouncyCastle.Crypto.Parameters;
using Org.BouncyCastle.Crypto;
using Org.BouncyCastle.Crypto.Engines;
using Org.BouncyCastle.Security;
using Org.BouncyCastle.Asn1.Pkcs;
using Org.BouncyCastle.Asn1;

namespace EncryptTest1
{
    class Program
    {
        static void Main(string[] args)
        {
            const string pubkey = @"MIICIjANBgkqhkiG9w0BAQEFAAOCAg8AMIICCgKCAgEAuQhcZKNnIC2bvJhI5Yzq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";
            const string prikey = @"MIIJKQIBAAKCAgEAuQhcZKNnIC2bvJhI5YzqoH9uGAHuiAt9bOXdIrsaeEwsIUMu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erk1b+rUWq5R931zmJ+hHTgOEe/wTW60BGX0ItEdeHwgMdqnAkiwqzPouw34Hs/O
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iQDO44oMy77DhcSJZOLK8d1z96GigJqRhD627nwitSn03lr+wKJ9+KurnQsWeUx+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";

            var publickey = Convert.FromBase64String(pubkey);
            var privatekey = Convert.FromBase64String(prikey);

            var asnprivate = Asn1Object.FromStream(new MemoryStream(privatekey));
            var privStruct = new RsaPrivateKeyStructure((Asn1Sequence)asnprivate);

            RsaKeyParameters privateAsymmetricKey = new RsaKeyParameters(true, privStruct.Modulus, privStruct.PrivateExponent);
            RsaKeyParameters publicAsymmetricKey = (RsaKeyParameters)PublicKeyFactory.CreateKey(publickey);

            var inputBytes = Encoding.UTF8.GetBytes("the message");

            Console.WriteLine("--- Message: ----");
            Console.WriteLine(Encoding.UTF8.GetString(inputBytes));

            IAsymmetricBlockCipher cipher = new RsaEngine();
            cipher.Init(true, publicAsymmetricKey);
            var cipheredBytes = cipher.ProcessBlock(inputBytes, 0, inputBytes.Length);

            Console.WriteLine("--- Enc utf8: ----");
            Console.WriteLine(Encoding.UTF8.GetString(cipheredBytes));

            Console.WriteLine("--- Enc Base64: ----");
            Console.WriteLine(Convert.ToBase64String(cipheredBytes));

            cipher.Init(false, privateAsymmetricKey);
            var deciphered = cipher.ProcessBlock(cipheredBytes, 0, cipheredBytes.Length);

            Console.WriteLine("--- Dec: ----");
            Console.WriteLine(Encoding.UTF8.GetString(deciphered));
            Console.ReadLine();
        }
    }
}

var publickey = Convert.FromBase64String(pubkey);
var privatekey = Convert.FromBase64String(prikey);

var asnprivate = Org.BouncyCastle.Asn1.Asn1Object.FromStream(new MemoryStream(privatekey));
var privStruct = new Org.BouncyCastle.Asn1.Pkcs.RsaPrivateKeyStructure((Org.BouncyCastle.Asn1.Asn1Sequence)asnprivate);
   
AsymmetricKeyParameter publicAsymmetricKey = PublicKeyFactory.CreateKey(publickey);

using System;
using System.IO;
using System.Text;
using Org.BouncyCastle.Crypto.Parameters;
using Org.BouncyCastle.Crypto;
using Org.BouncyCastle.Crypto.Engines;
using Org.BouncyCastle.Security;
using Org.BouncyCastle.Asn1.Pkcs;
using Org.BouncyCastle.Asn1;

namespace EncryptTest1
{
    class Program
    {
        static void Main(string[] args)
        {
            const string pubkey = @"MIICIjANBgkqhkiG9w0BAQEFAAOCAg8AMIICCgKCAgEAuQhcZKNnIC2bvJhI5Yzq
oH9uGAHuiAt9bOXdIrsaeEwsIUMuyNfXkLozwlcJb0YLgqhpP3gNLb58WCb1AvkV
ZHgzLQbay93HwmBiEPW6LZIKGsHwh1awBmJpeWhU8h3oNP+KpNq44H+jAeM9G9En
W0y7+AUbe3pnisOWVZHmM72A2mLq1piCOjmvjegzgB8/rU7ZkRrNadeFO7DBP0Ew
6eElS3iXfFHJmbK+L5lL0pFxvUMRfGVC33NQkuSoWiQJZsYyUgIk6WSOQm3t5fw6
VESMTfd1xKlaBGp7IrWksthEF+XAu5ziAcSdjBwJLEFzJ2830cQ4GhFS3JtU/Iao
6MbJkUuaHoI3Xx9C7d6RiKbK1uZrOHjyVsUhqpYwyAUdrViraj0pybxbE2GwbRC4
/NyHuPKG3gBULiGYbl8wwlhl71nRVdkPQtGw36kmGWHRk3ERM6JgLWsDZjED4ak2
Na6VzIvnqVs0HROl/4Rd4rHZvl9t39tfVBtofEkD4C0B5BdgW/B2XQM7Fd4celn3
q/+FKmvaVydoFGG0s4YZL6hsqOISfhdT10jGrwNKe+zupnrXZO66mtX8rvPtY4x2
WXcHrbp1cgSr+2r8Mteh8Eff+6rqArU1i1ezDm3SrKs1WMFKu1hRKDYudfOaB/L7
gvEvD+lUE9qnjlYUBGSXKMUCAwEAAQ==";
            const string prikey = @"MIIJKQIBAAKCAgEAuQhcZKNnIC2bvJhI5YzqoH9uGAHuiAt9bOXdIrsaeEwsIUMu
yNfXkLozwlcJb0YLgqhpP3gNLb58WCb1AvkVZHgzLQbay93HwmBiEPW6LZIKGsHw
h1awBmJpeWhU8h3oNP+KpNq44H+jAeM9G9EnW0y7+AUbe3pnisOWVZHmM72A2mLq
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BIe/0Vc1/0d80lkJk/3SnLGIAiC2C9dpmA6RmgkGa0cyD5QPmXmYXHFT+tA7S/lV
W+5C6ZO0aaOmO+F+W82ZJ92FRd8CITasoPO9zxalJBEGD/s5ehnRhhizLqjY";

            var publickey = Convert.FromBase64String(pubkey);
            var privatekey = Convert.FromBase64String(prikey);

            var asnprivate = Asn1Object.FromStream(new MemoryStream(privatekey));
            var privStruct = new RsaPrivateKeyStructure((Asn1Sequence)asnprivate);

            RsaKeyParameters privateAsymmetricKey = new RsaKeyParameters(true, privStruct.Modulus, privStruct.PrivateExponent);
            RsaKeyParameters publicAsymmetricKey = (RsaKeyParameters)PublicKeyFactory.CreateKey(publickey);

            var inputBytes = Encoding.UTF8.GetBytes("the message");

            Console.WriteLine("--- Message: ----");
            Console.WriteLine(Encoding.UTF8.GetString(inputBytes));

            IAsymmetricBlockCipher cipher = new RsaEngine();
            cipher.Init(true, publicAsymmetricKey);
            var cipheredBytes = cipher.ProcessBlock(inputBytes, 0, inputBytes.Length);

            Console.WriteLine("--- Enc utf8: ----");
            Console.WriteLine(Encoding.UTF8.GetString(cipheredBytes));

            Console.WriteLine("--- Enc Base64: ----");
            Console.WriteLine(Convert.ToBase64String(cipheredBytes));

            cipher.Init(false, privateAsymmetricKey);
            var deciphered = cipher.ProcessBlock(cipheredBytes, 0, cipheredBytes.Length);

            Console.WriteLine("--- Dec: ----");
            Console.WriteLine(Encoding.UTF8.GetString(deciphered));
            Console.ReadLine();
        }
    }
}