Migrating from JSP/Servlets to ASP.NET

Re: Signature in Java

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Re: Signature in Java

avaya001 — Wed, 12 Sep 2007 09:53:01 GMT

Hi, I am trying to do something similar to this and am finding very little useful information. Any help appreciated!

I am trying to sign and encrypt data using X509 Certs in .Net 2.0 and send the info to a Java webservice.

I need to do the following:

Sign the data with the my private key from my cert and get the signature with SHA1 with RSA format
Encrypt the data using AES with a random generated key
Encrypt the random gen AES key using the recipients public key
Send the webervice the signed, encrypted data and the signature

I have succeeded in encrypting and decrypting the data using the certs. The problem I have is getting the signature from my cert's private key. Any help on how to achieve this?

Thanks
Stephen

Re: Signature in Java

jcw14 — Wed, 07 Feb 2007 11:30:46 GMT

You asked this a long time ago, so you've probably worked out the answer by now, but you do something similar to this:

RSACryptoServiceProvider rsa = new RSACryptoServiceProvider();
rsa.FromXmlString(certificate.PublicKey.Key.ToXmlString(false));

Signature in Java

crino — Fri, 24 Nov 2006 18:40:45 GMT

I've this code:

Signature sigVer = Signature.getInstance("SHA1withRSA");
sigVer.initVerify(publicKey);
sigVer.update(barrayToEncrypt);
result = sigVer.verify(barrayToVerify);

how can convert to C# (ASP.NET 2.0)??
I tried with:

RSACryptoServiceProvider RSA = (RSACryptoServiceProvider)publicKey.Key; //publicKey is get from certificate file with X509Certificate2 class
but wheni try to call RSA.Encrypt() i get 'The key status is invalid' or something like this

Any idea?? :(