c# implementations of AES encryption
Hi, I can't seem to find a nice clean example of using AES 128 bit encryption. Does anyone have some sample code? ...
rijndaelmanaged
RijndaelManaged supports 128-256 bit key, what key size the default constructor generator?
Hi, For new RijndaelManaged(), the documentation says it supports keys of 128 bits and up to 256 bits. When you instantiate new RijndaelManaged(), it creates the Key and IV for you. What size does it default to, 128 bits? ...
How to store the AES Rijndael generated Key to the database?
Hi, When creating the instance, the KEY and IV are generated for me. RijndaelManaged myRijndael = new RijndaelManaged(); How can I store the Key in my database or web.config file? And in what format? Because I will have to load the key when trying to decrypt the encrypted string obviously. thanks for your help, a little lost on th...
What do Streams do when implementing AES encrption in .NET?
Hi, The Rijndael encryption algorithm is implemented in .NET using 3 streams in the following example: Rinjdael. Can someone explain to me what these streams are doing? How/Why are they used? // Declare the streams used // to encrypt to an in memory // array of bytes. MemoryStream msEncrypt = null; CryptoStream csEncrypt = null; Stre...
Converting the Rijndaelmanged() byte[] to a string
Hi, I want to convert the Rijndaemanaged() encrpted value to a string. Will ToBase64String() suffice? It says its only for 8-bit arrays, but AES is 128 bit right? Update For the encrption, I am using the code from http://msdn.microsoft.com/en-us/library/system.security.cryptography.rijndaelmanaged.aspx ...
Strange Error in .net Application. - RijndaelManaged..
During a recent load test, I've been getting some strange "Index Out of Range Exception" Stack trace: at System.Security.Cryptography.RijndaelManagedTransform.DecryptData(Byte[] inputBuffer, Int32 inputOffset, Int32 inputCount, Byte[]& outputBuffer, Int32 outputOffset, PaddingMode paddingMode, Boolean fLast) at System.Security....
ASP.NET 2.0 RijndaelManaged encryption algorithm vs. FIPS
I'm running into an issue with an ASP.NET 2.0 application. Our network folks just upped our security, and now I get the floowing error whenever I try to access the app: "This implementation is not part of the Windows Platform FIPS validated cryptographic algorithms." I've done a little research, and it sounds like ASP.NET uses the...
Decrypting RijndaelManaged Encrypted strings with CryptDecrypt
Ok I'm trying to use the Win32 Crypto API in C++ to decrypt a string encrypted in C# (.NET 2) with the RijndaelManaged Class. But I'm having no luck at all i get jibberish or a bad data Win32 error code. All my keys, IV and salt match, I've looked in the watch for both test apps. I've spent all say looking at it and I'm officialy stuc...
Why can't C# decrypt the output from Perl's Crypt::Rijndael?
A file has been encrypted by Perl. Initial decrypt attempts failed and I am now trying to ascertain whether there is any hoojoo going on (some other settings required) Duff Perl Code: use strict; use Crypt::Rijndael; my $key ='...'; my $rcipher = Crypt::Rijndael->new ($key, Crypt::Rijndael::MODE_CBC()); undef $/; my $encrypted = <>...
Difference between symmetric crypto algorithms
C# looks to have 4 different symmetric crypto algorithms: RijndaelManaged, DESCryptoServiceProvider, RC2CryptoServiceProvider, and TripleDESCryptoServiceProvider. I am looking for more information between them. Mainly what is the differences between each of them. MSDN isn't being much help, or I am just tired. ;) I am sure there is pro...
Is this a reasonable way to implement 'remember me' functionality.
If a user logs into the site, and says 'remember me', we get the unique identifier for the user, encrypt this with RijndaelManaged with a keysize of 256 and place this in a httponly cookie with a set expiration of say.. 120 days, the expiration is refreshed each successful request to the server. Optionally we generate the initialization...
Rijndael / AES from C# to VB6
Hello, I need to encrypt a byte array in VB6 and decrypt it in C# (NET 2.0). And viceversa (C# to VB6). In C# I used RijndaelManaged class. In VB6 I used free pieces of from Internet. The best seems to be http://www.frez.co.uk/freecode.htm#rijndael But the two implementations generate different outputs starting from the same input :( ...
RSA Encryption public key not returned from container???
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 { ...
"Length of the data to decrypt is invalid." exception during Rijndael decryption
I get "Length of the data to decrypt is invalid." exception when i try to decrypt a memory stream. I am beginner, cant figure out whats wrong. whats wrong? public bool EncryptStream() { string password = @"myKey123"; // Your Key Here UnicodeEncoding UE = new UnicodeEncoding(); byte[] key = UE.GetBytes(passwo...
When will C# AES algorithm be FIPS compliant?
Right now the only way I can get the RijndaelManaged algorithm to work on a computer with the Local Security Setting for FIPS turned on, is to disable it. It is a government computer, so I'm not sure how that will fly. I've seen posts on the msdn blog sites that say they are working on an AES FIPS compliant version, but I cant seem to ...
Length of the data to decrypt is invalid.
I'm trying to encrypt and decrypt a file stream over a socket using RijndaelManaged, but I keep bumping into the exception CryptographicException: Length of the data to decrypt is invalid. at System.Security.Cryptography.RijndaelManagedTransform.TransformFinalBlock(Byte[] inputBuffer, Int32 inputOffset, Int32 inputCount) at Syst...
Specified initialization vector (IV) does not match the block size for this algorithm.
I am working on a base encryption method. I am using RijndaelManaged. I got this code from somewhere a long time ago, but can't remember where. I had my code working before, but something changed and I cannot quite figure it out. When I run my code, I get the following error; Specified initialization vector (IV) does not match th...
How to convert a byte array to a string?
Hi, Using the function from: http://msdn.microsoft.com/en-us/library/system.security.cryptography.rijndaelmanaged.aspx public static byte[] encryptStringToBytes_AES(string plainText, byte[] Key, byte[] IV) As you can see it returns a byte array, I want to convert the byte array to a string. How can I convert it from a byte array to ...
Why are RijndaelManaged and AesCryptoServiceProvider returning different results?
Here is the example that I have run. It has the same Mode, Padding, BlockSize, KeySize. I am using the same init vector, key and data. Using the RijndaelManaged produces an encrypted value of: 0x8d,0x81,0x27,0xc6,0x3c,0xe2,0x53,0x2f,0x35,0x78,0x90,0xc2,0x2e,0x3b,0x8a,0x61, 0x41,0x47,0xd6,0xd0,0xff,0x92,0x72,0x3d,0xc6,0x16,0x2b,0xd8,0x...
Thread Safety of .NET Encryption Classes?
I have a high-level goal of creating a static utility class that encapsulates the encryption for my .NET application. Inside I'd like to minimize the object creations that aren't necessary. My question is: what is the thread-safety of the classes which implement symmetric encryption within the .NET Framework? Specifically System.Secur...