我正在创建一个证书分发系统来跟踪客户和东西。
会发生什么：
- 客户端向服务器发送 CSR
- 服务器检查并签署证书
- 服务器向客户端发送签名证书
- 客户端将签名证书和私钥放在 Windows 存储中。
所以在客户端会发生这种情况：
//Pseudo Server Object:
Server s = new Server();
//Requested Certificate Name and things
X509Name name = new X509Name("CN=Client Cert, C=NL");
//Key generation 2048bits
RsaKeyPairGenerator rkpg = new RsaKeyPairGenerator();
rkpg.Init(new KeyGenerationParameters(new SecureRandom(), 2048));
AsymmetricCipherKeyPair ackp = rkpg.GenerateKeyPair();
//PKCS #10 Certificate Signing Request
Pkcs10CertificationRequest csr = new Pkcs10CertificationRequest("SHA1WITHRSA", name, ackp.Public, null, ackp.Private);
//Make it a nice PEM thingie
StringBuilder sb = new StringBuilder();
PemWriter pemwrit = new PemWriter(new StringWriter(b));
pemwrit.WriteObject(csr);
pemwrit.Writer.Flush();
s.SendRequest(sb.ToSting());
好的，所以我会跳过服务器端只要相信我，服务器会签署证书并将其发送回客户端。那就是我要采取行动的地方。
PemReader pr = new PemReader(new StringReader(b.ToString()));
X509Certificate cert = (X509Certificate)pr.ReadObject();
//So lets asume I saved the AsymmetricCipherKeyPair (ackp) from before
//I have now the certificate and my private key;
//first I make it a "Microsoft" x509cert.
//This however does not have a PrivateKey thats in the AsymmetricCipherKeyPair (ackp)
System.Security.Cryptography.X509Certificates.X509Certificate2 netcert = DotNetUtilities.ToX509Certificate(cert);
//So here comes the RSACryptoServerProvider:
System.Security.Cryptography.RSACryptoServiceProvider rcsp = new System.Security.Cryptography.RSACryptoServiceProvider();
//And the privateKeyParameters
System.Security.Cryptography.RSAParameters parms = new System.Security.Cryptography.RSAParameters();
//now I have to translate ackp.PrivateKey to parms;
RsaPrivateCrtKeyParameters BCKeyParms = ((RsaPrivateCrtKeyParameters)ackp1.Private);
//D is the private exponent
parms.Modulus = BCKeyParms.Modulus.ToByteArray();
parms.P = BCKeyParms.P.ToByteArray();
parms.Q = BCKeyParms.Q.ToByteArray();
parms.DP = BCKeyParms.DP.ToByteArray();
parms.DQ = BCKeyParms.DQ.ToByteArray();
parms.InverseQ = BCKeyParms.QInv.ToByteArray();
parms.D = BCKeyParms.Exponent.ToByteArray();
parms.Exponent = BCKeyParms.PublicExponent.ToByteArray();
//Now I should be able to import the RSAParameters into the RSACryptoServiceProvider
rcsp.ImportParameters(parms);
//<em><b>not really</b></em> This breaks says "Bad Data" and not much more. I'll Post the
//stacktrace at the end
//I open up the windows cert store because thats where I want to save it.
//Add it and save it this works fine without the privkey.
X509Store store = new X509Store(StoreName.My, StoreLocation.CurrentUser);
store.Open(OpenFlags.MaxAllowed);
store.Add(netcert);
store.Close();
现在您可能认为服务器端一定有问题。好吧，我也是这么想的，但是当我从这个证书制作一个 pfx 文件并手动导入它时，它工作得很好......
不知何故，.NET RSA 私钥和 BouncyCastle RSA 私钥之间存在差异，我无法确定。
您可能会建议导入 pfx，然后通过 X509Store 从中获取私钥。我试过。:S 失败了。一旦我尝试ExportParameters(true)真正代表包含私有参数。它说“密钥在指定状态下无效。”。请参阅最后的完整例外。
我希望你们中的一些人以前杀过这头猪，或者可以帮助我。
***Exceptions:***
System.Security.Cryptography.CryptographicException was unhandled
Message="Key not valid for use in specified state.\r\n"
Source="mscorlib"
StackTrace:
at System.Security.Cryptography.CryptographicException.ThrowCryptogaphicException(Int32 hr)
at System.Security.Cryptography.Utils._ExportKey(SafeKeyHandle hKey, Int32 blobType, Object cspObject)
at System.Security.Cryptography.RSACryptoServiceProvider.ExportParameters(Boolean includePrivateParameters)
InnerException:
***And the other one:***
System.Security.Cryptography.CryptographicException was unhandled
Message="Bad Data.\r\n"
Source="mscorlib"
StackTrace:
at System.Security.Cryptography.CryptographicException.ThrowCryptogaphicException(Int32 hr)
at System.Security.Cryptography.Utils._ImportKey(SafeProvHandle hCSP, Int32 keyNumber, CspProviderFlags flags, Object cspObject, SafeKeyHandle& hKey)
at System.Security.Cryptography.RSACryptoServiceProvider.ImportParameters(RSAParameters parameters)
InnerException: