rijndaelmanaged

问题 I am organizing some very basic symmetric encryption/decryption codes in a class for future use. I am able to encrypt and decrypt successfully... only with a small problem. Here is my code that reads in from a stream and en/decrypt to another stream: public void Encrypt(Stream input, Stream output) { byte[] key = Encoding.UTF8.GetBytes(_pw); byte[] iv = Encoding.UTF8.GetBytes(GenerateInitVector()); RijndaelManaged rm = new RijndaelManaged(); CryptoStream cs = new CryptoStream( output, rm

问题 I am using the AES methods here: http://msdn.microsoft.com/en-us/library/system.security.cryptography.rijndaelmanaged.aspx I want to have a string value that I will convert to byte array and pass it to the AES encrypt method. How many characters should the string be to produce the correct byte array size that the method expects? static byte[] encryptStringToBytes_AES(string plainText, byte[] Key, byte[] IV) { // Check arguments. if (plainText == null || plainText.Length <= 0) throw new

问题 I need to transfer xml files and they are required to be encrypted. I have found some examples think I'm close but when I decrypt the file I end up with trailing junk characters. There are some posts about this but I have not seen any that will exactly help. Here is the encrypt and decrypt code. private void EncryptFile(string inputFile, string outputFile, string key) { try { byte[] keyBytes; keyBytes = Encoding.Unicode.GetBytes(key); Rfc2898DeriveBytes derivedKey = new Rfc2898DeriveBytes(key

问题 I need to transfer xml files and they are required to be encrypted. I have found some examples think I'm close but when I decrypt the file I end up with trailing junk characters. There are some posts about this but I have not seen any that will exactly help. Here is the encrypt and decrypt code. private void EncryptFile(string inputFile, string outputFile, string key) { try { byte[] keyBytes; keyBytes = Encoding.Unicode.GetBytes(key); Rfc2898DeriveBytes derivedKey = new Rfc2898DeriveBytes(key

问题 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 RijndaelManaged AES encryption algorithm to encrypt the ViewState of pages... and RijndaelManaged is on the list of algorithms that aren't FIPS compliant. We're

问题 I think the distinguishing factors are AesCryptoServiceProvider is FIPS compliant AesManaged is cross-platform, requires .NET 3.0 RijndaelManaged runs on .NET 2.0, requires restricting the blocksize is that about right? 回答1: AesManaged documentation states that "The AES algorithm is essentially the Rijndael symmetric algorithm with a fixed block size and iteration count. This class functions the same way as the RijndaelManaged class but limits blocks to 128 bits and does not allow feedback

问题 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 System.Security.Cryptography.CryptoStream.FlushFinalBlock() at System.Security.Cryptography.CryptoStream.Dispose(Boolean disposing) The exception is thrown at the end of

问题 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 find out anything more. Does anyone know when this might happen? 回答1: I never realized this before this question, but you're right. The constructor has this:

问题 I'm trying to setup AES encryption / decryption using the javascript library SlowAES and the RijndaelManaged class in .NET. I chose this method after reading this post, where Cheeso has managed to get these two encryption methods to play together "In my tests of the COM-wrapped-SlowAEs, I used CBC mode, and the encryption was completely compatible with the RijndaelManaged class in .NET" - Cheeso I've taken the javascript code from Cheeso's Windows Scripting Component, the latest slowaes

问题 I am spending some time learning how to use the RijndaelManaged library in .NET, and developed the following function to test encrypting text with slight modifications from the MSDN library: Function encryptBytesToBytes_AES(ByVal plainText As Byte(), ByVal Key() As Byte, ByVal IV() As Byte) As Byte() ' Check arguments. If plainText Is Nothing OrElse plainText.Length <= 0 Then Throw New ArgumentNullException("plainText") End If If Key Is Nothing OrElse Key.Length <= 0 Then Throw New