rsacryptoserviceprovider

Error occurred while decoding OAEP padding

由 China☆狼群 提交于 2019-12-10 23:56:35
问题 I am half way through my problem.. Please Help.. I have successfully encrypted the text using public key of digital signatures but while decrypting it, I am getting the error. Error occurred while decoding OAEP padding. My code is a follows. #region Test Encryption public void a() { using (var rsa = new RSACryptoServiceProvider()) { // This String consists only Public Key Information String publicKeyOnly = rsa.ToXmlString(false); // This String consists both Private/Public Key information

RSA Encryption public key not returned from container?

由 久未见 提交于 2019-12-10 22:05:10
问题 I feel like what I am trying to do is very simple. But for some reason it doesn't want to work: Here is a complete code snippet to test what I am trying to do: using System; using System.Xml; using System.Security.Cryptography; using System.Security.Cryptography.Xml; namespace XmlCryptographySendingTest { class Program { static void Main(string[] args) { string fullKeyContainer = "fullKeyContainer"; string publicKeyContainer = "publicKeyContainer"; //create the two providers

Object already exists in RSACryptoServiceProvider

由 南笙酒味 提交于 2019-12-08 17:24:46
问题 I copied the source code from one application to another, both running on the same machine. I am also using the same string for containerName below in both applications. What is preventing my new application from reading the key that was saved in the other application? All other things are equal, logged in user account etc. CspParameters cspParams = new CspParameters(); cspParams.KeyContainerName = containerName; cspParams.Flags = CspProviderFlags.UseMachineKeyStore; // Get error "object

How to check if a key already exists in container?

由 陌路散爱 提交于 2019-12-07 06:40:19
问题 I'm building an application for secure messaging between multiple clients. In order to achieve that, I encrypt the message with AES, then I encrypt the AES key with the recipients public RSA key, then I send these two components (RSA-encrypted AES key and AES-encrypted message) to the recipient. The whole process works well and without any errors. Now I ran into a problem and I'm wondering what would be the best practice: In order to persist the private and public key of one participent, I

C# RSA encrypt/decrypt throws exception

由 喜你入骨 提交于 2019-12-07 00:16:41
I'm trying to set up a simple server side RSA encryption of a small chunk of info which is to be decrypted on the client side. Just as a proof of concept I wrote a few lines to ensure that the public and private key could be loaded from xml. However, I'm struggling to make even the most simple stuff work on my machine: byte[] bytes = Encoding.UTF8.GetBytes("Some text"); bool fOAEP = true; // seeding a public and private key RSACryptoServiceProvider rsa = new RSACryptoServiceProvider(); var publicKey = rsa.ToXmlString(false); var privateKey = rsa.ToXmlString(true); //server side

How to check if a key already exists in container?

由 筅森魡賤 提交于 2019-12-05 10:54:11
I'm building an application for secure messaging between multiple clients. In order to achieve that, I encrypt the message with AES, then I encrypt the AES key with the recipients public RSA key, then I send these two components (RSA-encrypted AES key and AES-encrypted message) to the recipient. The whole process works well and without any errors. Now I ran into a problem and I'm wondering what would be the best practice: In order to persist the private and public key of one participent, I need to store the key pair. Saving it somewhere as an XML file is possible, but obviously not an option.

RSA Key Values and Modulus in Public/Private Keys

由 ≡放荡痞女 提交于 2019-12-05 10:38:27
I am writing an application that used PKI to secure email, files etc. Using the System.Cryptography namespace, I am generating a new key pair using RSACryptoServiceProvider . The method is: public static void GenerateKeys(int keySize, out string publicKey, out string privateKey) { using (var provider = new RSACryptoServiceProvider(keySize)) { publicKey = provider.ToXmlString(false); privateKey = provider.ToXmlString(true); } } keySize = 2048. This results in a public key like (this has been trimmed/padded with "-----START/END PUBLIC KEY BLOCK-----" wrappers for neatness. -----START PUBLIC KEY

how to decrypt an encrypted text using RSACryptoServiceProvider?

由 China☆狼群 提交于 2019-12-04 14:52:01
I have encrypted a text using RSACryptoServiceProvider. I exported the public and private key. Obviously I just want to expose the public key inside the decoder application, so I have written a code as follows : private const string PublicKey = "<RSAKeyValue><Modulus>sIzQmj4vqK0QPd7RXKigD7Oi4GKPwvIPoiUyiKJMGP0qcbUkRPioe2psE/d3c1a2NY9oj4Da2y1qetjvKKFad2QAhXuql/gPIb1WmI+f6q555GClvHWEjrJrD/ho7SLoHbWd6oY6fY609N28lWJUYO97RLVaeg2jfNAUSu5bGC8=</Modulus><Exponent>AQAB</Exponent></RSAKeyValue>"; private string Decrypt() { byte[] encryptedKeyAsBytes = Convert.FromBase64String(_encryptedKey);

Generate public-private key pair and show them in textbox in asp.net

由 ↘锁芯ラ 提交于 2019-12-04 12:37:05
问题 any body can explain the parameters of RSAParameters i had seen the parameters like p,d,e,q,... i need the private key and public key from it i got the link http://msdn.microsoft.com/en-us/library/system.security.cryptography.rsaparameters%28v=vs.90%29.aspx[^] i am using the sample code as like this can anybody can say it was right or not sample code: //Generate a public/private key pair. RSACryptoServiceProvider RSA = new RSACryptoServiceProvider(); //Save the public key information to an

signature with SHA256

由 一个人想着一个人 提交于 2019-12-04 09:59:27
I have a smartcard and I need to sign a file with this. That is a big problem as I see in stackover. I couldnt use RSACryptoServiceProvider, bkz it doesnt support RSA-SHA256 alogrithm. At First I used CAPICOM.dll , like code bellow, SignedData sed = new SignedData(); sed.Content = "a"; // data to sign Signer ser = new Signer(); ser.Certificate = cc; string singnn = sed.Sign(ser, false, CAPICOM_ENCODING_TYPE.CAPICOM_ENCODE_BASE64); But there isnt a public key to validate my signature value,, I couldnt get a validate key from capicom.dll. And after , I used X509Certificate2 , and
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