All Questions
14 questions
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Data Protection API (DPAPI) : what algorithm is used to encrypt the data [duplicate]
In document only mentioned that "It provides protection using the user or machine credentials to encrypt or decrypt data." but there is no explanation about what algorithm is used to encrypt ...
- 151
0
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0
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101
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Why is RsaCryptoServiceProvider.FromXmlString throwing a WindowsCryptographicException about a file being in use?
I am using the RSACryptoServiceProvider class from .NET 6 to do some signing operations and am running into an unknown WindowsCryptoGraphicException when loading key information from an XML string.
...
2
votes
1
answer
330
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RSACryptoServiceProvider.VerifyData doesn't work properly on different Windows versions
Introduction
I have a digital code signing logic in my application. I use custom signing tool which signs dll files and create .sig text files with signed hash values. This tool runs on .NET 6, gets ...
0
votes
1
answer
191
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Does .NET 6.0 have its own cryptography libs that will enable more secure ciphers than the OS supports?
Does .NET 6.0 have its own libraries that will allow support for later more secure cryptography ciphers for TLS that are not currently support on Windows 2012?
Eg TLS 1.3 or 1.2 with GCM or POLY1305 ...
- 6,371
0
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0
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1k
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CryptDecodeObjectEx fails with CRYPT_E_ASN1_BADTAG
I am trying to verify a HMAC but CryptDecodeObjectEx is returning an error.
First, I have exported a PEM from a PFX. I export via .NET using
pem = Convert.ToBase64String(x509Cert.Export(...
- 297
0
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0
answers
172
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Can I decrypt a .gpg file by using Windows CNG store?
I'm creating this tool in C# that would take a .gpg file and decrypt it using Windows CNG. I get a .gpg file as my input parameter and it is encrypted with my key using WinPT. Decrypting it works with ...
0
votes
1
answer
2k
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Using ProtectedData.Protect() for files
I'm working on some code that ideally can encrypt a file using the Windows DPAPI. This is fine if the file can be read directly into memory, but if it can't I cannot encrypt it. ProtectedData.Protect ...
- 638
1
vote
1
answer
66
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My decrypted password is 1 character to short
So I have this encryption / decryption code:
private string Crypt(string strData, string strPassword, bool bEncrypt)
{
byte[] u8_Salt = new byte[] { xxx };
PasswordDeriveBytes i_Pass ...
- 19k
-1
votes
1
answer
35
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Hashing a password in .net
I'd like to store passwords in a database. How secure is the following code:
static string ComputeHash(string password, string salt, int iteration)
{
Rfc2898DeriveBytes hash = new ...
- 8,026
2
votes
1
answer
228
views
Correct CryptoAPITransform use? Memory leak
I've ported an old piece of unmanaged code that used Crypto API to 100% managed .NET code. The code used DES algorithm, and had to maintain it for several reasons.
Since the CryptoAPITransform ...
- 1,032
2
votes
1
answer
4k
views
Windows CNG custom key storage provider
How to register a custom key storage provider in CNG with its own key BLOB format, etc? What I really want to do is to provide an ability to handle a custom CNG key BLOB format in .NET. I've read in ...
- 113
3
votes
3
answers
9k
views
What's a simple way to encrypt and decrypt strings with a user-supplied password that works in both native Win32 and .NET?
I have a native Win32 client application, and a .NET web application. I'd like to be able to encrypt a string on the client (given a user supplied password), and to be able to decrypt this string on ...
- 1,257
7
votes
2
answers
4k
views
Translating Win32 Crypto API calls to C# with System.Security.Cryptography
I have been given an assignment to drop one of our product's dll and replace it with a pure C# one. The old DLL is a .NET 2.0 Managed C++ (C++\CLI) which wraps calls to the Win32 native Crypto API. ...
- 566
-1
votes
1
answer
238
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Shared but Secure Memory between 3 Different Apps (Windows)
We are writing a set of application for windows which contains IE toolbar, Firefox toolbar and Windows Desktop client.
Before using any of these components user provides his secret code and says that ...
- 12.6k