rijndael

问题 I can encrypt a text file that is located on my desktop using the following code. private void btnEncrypt_Click(object sender, EventArgs e) { //EncryptFile(); try { OpenFileDialog dialog = new OpenFileDialog(); dialog.Filter = "All Files (*.*)|"; dialog.InitialDirectory = @"Desktop"; dialog.Title = "Please select a file to encrypt."; dialog.ShowDialog(); inputFile = dialog.FileName; outputFile = inputFile; string password = @"myKey123"; // Your Key Here UnicodeEncoding UE = new

问题 I have to credit card number to be encrypted and stored in database as a string. I do the following RijndaelManaged rijMan = new RijndaelManaged(); byte[] encrypt = Encrypt(txtCredit.Text, rijMan.Key, rijMan.IV); string card = Convert.ToBase64String(encrypt); string key = Convert.ToBase64String(rijMan.Key); string iv = Convert.ToBase64String(rijMan.IV); and this is encrypt function: public static byte[] Encrypt(string message, byte[] key, byte[] iv) { byte[] encrypted; using (RijndaelManaged

问题 I want to encrypt long paragraphs of text using Rijndael-256 (the text has been compressed and converted to base64 before this). It is very unlikely for the two to be the same. But if they happen to be, would adding a random key to the start or end of the text secure it (regardless of whether they're the same), just in case users write the same text? If I make sure that no results are 100% the same, is ECB safe if you won't get duplicate results? Or is it like this: (using base64... not

问题 I have a working decryption in ActionScript 3, now I want to get the same result when decrypting in Java. (I know that the OFB-mode and NullPadding is probably not preferred, but that's what I used back then and that is what I need to decrypt now...) (very old) Adobe ActionScript 3 code: static public function decryptTest(): Boolean { var iv: String = "0df1eff724d50157ab048d9ff214b73c"; var cryptext: String =

问题 I have the following code in C# string s = "hellowld"; byte[] bytes = new UnicodeEncoding().GetBytes(s); FileStream stream = new FileStream(inputFile, FileMode.Open); RijndaelManaged managed = new RijndaelManaged(); CryptoStream stream2 = new CryptoStream(stream, managed.CreateDecryptor(bytes, bytes), CryptoStreamMode.Read); FileStream stream3 = new FileStream(outputFile, FileMode.Create); try { int num; while ((num = stream2.ReadByte()) != -1) { stream3.WriteByte((byte) num); } [....] This

问题 I'm currently developing a little tool in C# that allows me to quickly crypt my files. So I used this script which looks to be perfect for me. But I still have a problem : the key is too short (8 character max). I read in RijndaelManaged() documentation that maximum size for the key is 256 bits, so I should be able to use a 64 character key... (like sha256 hash) But every time I try to increase the key size, I get a nice "Encryption failed !", even for 9 characters. I've been looking for a

问题 I'm using Rijndael to encrypt some sensitive data in my program. When the user enters an incorrect password, most of the time a CryptographicException is thrown with the message "Padding is invalid and cannot be removed.". However, with very small probability, the CryptStream does not throw an exception with the wrong password, but instead gives back an incorrectly decrypted stream. In other words, it decrypts to garbage. Any idea how to detect/prevent this? The simplest way I can think of

问题 I am trying to share encryption between Action Script and C# My task is to decrypt the following message within C# f1ca22a365ba54c005c3eb599d84b19c354d26dcf475ab4be775b991ac97884791017b12471000def05bb77bfe9c3a97d44ef78c9449f12daf6e25b61ab1a281 It uses Rijndael encyption , ECB mode (electronic code book), Key: Pas5pr@se , 128 bit key size and block size. The problem I have is I can't seem to do it, anyone help me on this? 回答1: This is an implementation of Rijndael Encryption which one of my

问题 I'm trying to do a simple task. Encypt a value in PHP and Decrypt it in my VB.net app. I figure I'd use tripleDES or Rijdael 128 or 256 I though this should be simple. Can anyone point me in the right direction? Thank you 回答1: We have some ciphers working between C# on .NET and PHP. I am not familiar with VB.net. I assume it uses the same crypto library System.Security.Cryptography . On PHP side, we switched from mcrypt to OpenSSL because some modes and paddings are not supported by mcrypt.

问题 I have two system which are sharing a user database, so authentication needs to be the same. The passwords are currently encrypted using C#'s Cryptography.Rijndael (N.B. not RijndaelManaged). Using a custom key and iv (initialisation vector). (CBC mode and Pkcs7 padding) The C# encryption is as follows: Rijndael alg = Rijndael.Create(); alg.Key = key; alg.IV = IV; CryptoStream cs = new CryptoStream(ms, alg.CreateEncryptor(), CryptoStreamMode.Write); cs.Write(clearData, 0, clearData.Length);