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Questions tagged [system.security]

59 questions
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How can I edit a DACL in C#?

Is there an analog of the SetFileSecurity function? I need to re-write some tests from Python and I'm stuck on this part. In Python I can freely edit a DACL with pywin32 (modules with a C++ implementation to work with Windows API). I can edit any…
Egor Egorov
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Why RecipientInfos throwing CryptographicException

I've got some class for encrypting and signing emails. Signing process is going without problems , but when I trying to encrypt the message using "Encrypt" method on EnvelopedCms instance ,I've got exception with information "invalid cryptographic…
Eryk Hubert Siejka
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ProtectedData.Unprotect after User changes password

I have a C# application that stores password information in a database using ProtectedData class. I use a scope of local machine and as I understand It DPAPI will use master key to encrypt it and it won't be changed unless I uninstall OS. Let's say…
user1480742
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After computer restart, 'System.Security.Cryptography.CryptographicException' : Keyset does not exist

I am using following code to sign the data: RSACryptoServiceProvider csp; X509Store my = new X509Store(StoreName.My, StoreLocation.LocalMachine); my.Open(OpenFlags.ReadOnly); foreach (X509Certificate2 cert in…
Aasish
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Nuget package is not finding and/or using System.Security.Cryptography

I'm writing some nuget packages for personal development, and I'm having a few issues with dependencies. I'm writing a security package and I need System.Security.Cryptography, and I can add a using statement fine (when the navigation bar is on…
TechnicalTophat
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'Cast object of type' error - resolved by IIS recycle

3rd party ASP.Net web site and web service installed. The code appears not to log errors to server log or custom error log. User receives the following critical untrapped error message: "System.Web.Services.Protocols.SoapException: Unable to cast…
Klaptrap
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NHibernate + Remoting = ReflectionPermission Exception

We are dealing with a problem when using NHibernate with Remoting in a machine with full trust enviroment (actually that's our dev machine). The problem happens when whe try to send as a parameter an object previously retrieved from the server, that…
Pedro
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C# Rijndael issue run-time error while trying to decrypt Padding is invalid or cannot be removed

I get a run-time error Padding is invalid and cannot be removed while trying to decrypt some data. I have read all the similar threads I found on stackoverflow and considered the following issues: Given a different key for decryption than the one…
Dex
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Configure Win 7 Network Adapter Programatically in C#

I want to configure all active network adapters in windows 7 programatically through c#. I have tried following code: string newIPAddress = "100.200.100.11"; string newSubnetMask = "255.255.255.1"; string[] newGateway = {…
Demon Hunter
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How can I get a list of all permissions for a certain file system object for a certain user or group using?

I do this at C# winh .NET4. It is easy to get the current user's credentials for any file or folder (like this). But the problem is that to get a collection of permissions (Read, Read Attributes, Write, etc.) for any given user or group, and I can…
Billy-Bob
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System.Security.SecurityException being thrown on initializing StructureMap bootstrapper

I am running a .NET 4.0 web application locally using the Visual Studio Development Server (built in web server with VS2010), and for the last couple months, my StructureMap bootstrapper file has worked perfectly. I'm using StructureMap 2.6.1 I have…
Michael McCarthy
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AES-256 for .Net 4.7.2 seems incorrect, is it my usage or MS?

A customer has provided sample code in C# as an encryption spec. My code is in Python 2.7, and I have to make my data match theirs. My data matches an online calculator but not the customer data. To make a demo, I have reduced everything to zero…
Larry Martin
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SignedXml.LoadXML((XmlElement)nodeList[0]) throwing "Malformed element SignedInfo/Reference"

I am having trouble when reading SignedInfo from XML of a signed document, when calling SignedXml signedXml; Directory.SetCurrentDirectory(TmpDir); XmlDocument xmlDoc = new XmlDocument(); foreach(Relationship signature in signs) { …
sadis
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System.Security.Cryptography.X509Certificates.X509Certificate2.GetECDsaPublicKey NotImplemented

We have created a signature in a .Net Core web api, using X509Certificate2.GetECDsaPrivateKey on a .pfx certificate file, and need to verify this signature in our Xamarin Android app, using the public key (.crt). I can run the code on a normal…
Thys
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Openssl Command Line for Triple DES HMAC like C# MACTripleDES

Can anyone explain how to make a TDES MAC in OpenSSL command line? I am trying to duplicate some functionality of a working C# program in C for the OpenSSL API, and am having trouble duplicating the .Net MACTripleDES.ComputeHash function in…
Larry Martin
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