Browse by Tags
All Tags »
RSACryptoServic... »
System.Security (RSS)
Hi all, You may get the following exception when trying to access X509Certificate2 . PrivateKey on a .NET 3.5 (or older) app: " System.Security.Cryptography. CryptographicException : Invalid provider type specified . at System.Security.Cryptography.Utils.CreateProvHandle(CspParameters
Read More...
Hi all, Before .NET Framework 3.5 SP1 , the default provider type for CspParameters was PROV_RSA_FULL (1) . Now it's PROV_RSA_AES (24) for all operating systems which support Microsoft Enhanced RSA and AES Cryptographic Provider (WinXP and higher). So
Read More...
Hi all, The other day a customer of mine had an interesting issue: a specific user runs their application for the first time without problem on a machine. Any other user can run the app without problems on the same machine, too. If that specific user
Read More...
Hi all, The other day a colleague of mine asked me if I had a .NET version of the C++ sample in How to generate key pairs, encrypt and decrypt data with CryptoAPI post. C++ sample calls CryptoAPI directly (and you know we can do the same thing in .NET
Read More...
Hi all, When working with RSACryptoServiceProvider , we may get an exception like the following: System.Security.Cryptography. CryptographicException : Unable to open the access token of the current thread at System.Security.Cryptography.CryptographicException.ThrowCryptogaphicException(Int32
Read More...
Hi all, When using RSACryptoServiceProvider in i.e. ASP.NET you may get the following exception under a heavy load scenario: "System.Security.Cryptography.CryptographicException: CryptoAPI cryptographic service provider (CSP) for this implementation could
Read More...
Hi all, Today I'm posting a sample which shows how to sign a text with a certificate in my Personal store (this cert will have public and private key associated to it) and how to verify that signature with a .cer file (for i.e. WinForms) applications
Read More...
Hi all, Today I'm posting a sample which signs an XML with or without a certificate (PFX file) and verifies the signature, all that with .NET and its SignedXml class. I won't include in the sample the code that VS designer includes when I add the textboxes
Read More...
Hi, welcome back, I will talk today about a very common issue we face when we try to use .NET's RSACryptoServiceProvider class in ASP.NET . When we try to create a new RSACryptoServiceProvider object in this scenario, we may get the following exception:
Read More...
