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This article introduces the example analysis of RSA code in C#RSA docking JAVA, the content is very detailed, interested friends can refer to it, hope to be helpful to you.

What is loaded in C # through the FromXmlString attribute is XML, while in JAVA, the parsed string in PEM format is used. In short, reading the information in the certificate is nothing more than a matter of conversion.

/ c # rsa encryption using the public key of java utf8 encoding encrypted data by parsing the public key / public static string RSAEncrypts (string content) {RSACryptoServiceProvider rsa = new RSACryptoServiceProvider (); byte [] cipherbytes; X509Certificate2 x509Certificate2 = new X509Certificate2 ("D:\\ Config\\ dsptest.cer"); / / create and return the xml string representation of the current algorithm object string publicKeyString = x509Certificate2.PublicKey.Key.ToXmlString (false) Rsa.FromXmlString (publicKeyString); / / rsa.FromXmlString (RSAPublicKeyJava2DotNet (publicKeyString)); cipherbytes = rsa.Encrypt (Encoding.UTF8.GetBytes (content), false); return Convert.ToBase64String (cipherbytes);} / the private key decryption parses the data X509KeyStorageFlags.Exportable by parsing the private key. The key attribute is to obtain the private key information of / public static string RSADecrypt (string content) {byte [] rgb = Convert.FromBase64String (content). RSACryptoServiceProvider rsa = new RSACryptoServiceProvider (); byte [] cipherbytes; X509Certificate2 x509Certificate2 = new X509Certificate2 ("D:\ Config\\ test.pfx", "cfca1234", X509KeyStorageFlags.Exportable); / / create and return the xml string representation of the current algorithm object / / rsa.FromXmlString (RSAPrivateKeyJava2DotNet (Const.privatekey)); rsa.FromXmlString (x509Certificate2.PrivateKey.ToXmlString (true)); cipherbytes = rsa.Decrypt (Convert.FromBase64String (content), false); return Encoding.UTF8.GetString (cipherbytes);}

/ * the following is how the public and private keys provided by java are converted to .net public and private key XML * * / RSA public key format conversion Java- > .net/// java generated public key / public static string RSAPublicKeyJava2DotNet (string publicKey) {RsaKeyParameters publicKeyParam = (RsaKeyParameters) PublicKeyFactory.CreateKey (Convert.FromBase64String (publicKey)) Return string.Format ("{0} {1}", Convert.ToBase64String (publicKeyParam.Modulus.ToByteArrayUnsigned ()), Convert.ToBase64String (publicKeyParam.Exponent.ToByteArrayUnsigned ();} / RSA private key format conversion, java- > .net/// RSA private key generated by java / public static string RSAPrivateKeyJava2DotNet (string privateKey) {RsaPrivateCrtKeyParameters privateKeyParam = (RsaPrivateCrtKeyParameters) PrivateKeyFactory.CreateKey (Convert.FromBase64String (privateKey)); return string.Format ("{0} {1})

{2}

{3} {4} {5} {6} {7} ", Convert.ToBase64String (privateKeyParam.Modulus.ToByteArrayUnsigned ()), Convert.ToBase64String (privateKeyParam.PublicExponent.ToByteArrayUnsigned ()), Convert.ToBase64String (privateKeyParam.P.ToByteArrayUnsigned ()), Convert.ToBase64String (privateKeyParam.Q.ToByteArrayUnsigned ()), Convert.ToBase64String (privateKeyParam.DP.ToByteArrayUnsigned ()), Convert.ToBase64String (privateKeyParam.DQ.ToByteArrayUnsigned ()), Convert.ToBase64String (privateKeyParam.QInv.ToByteArrayUnsigned ()), Convert.ToBase64String (privateKeyParam.Exponent.ToByteArrayUnsigned ());}

This is the example analysis of the code of RSA mode in C#RSA docking JAVA. I hope the above content can be helpful to you and learn more knowledge. If you think the article is good, you can share it for more people to see.

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