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. I...
Hi, I have an encrypted string from one of our customers. This string was encrypted using the AES method in Java. The only thing I have is the key: "xxxxxxxxxxxxxxxxxxxxxxxx" (24 chars) and the encrypted text: "56e84e9f6344826bcfa439cda09e5e96" (32 chars). (This really is the only data I have) I can't seem to find a method to decryp...
In my situation I have a number of files that will be stored on a server. Each of these files is created by a C# application that I am writing. background: For this application, the amount of time needed to encrypt isnt important, the files tend to be small and we've got plenty of CPU cycles to spare (the client is the only computer ...
Hi, I am using RijndaelManaged in my current project to encrypt data , is there any way tht I can check whether the data is already encrypted or not so i don't end up encrypting it twice? ...
Hi there! I'm in a situation where I need to encrypt / decrypt a file of n length securely, ideally using Rijndael, but definitely at 256bit encryption. I've played around with encryption before and have encrypted/decrypted strings and byte arrays quite happily. However, because I don't know the size of the file (and it's very feasible...
I have the need to calculate the size of a file I am encrypting using Rijndael. According to other answers on this site, and on google, the following is the correct way of calculating encrypted data length: EL = UL + (BS - (UL Mod BS) Mod BS) Where: EL = Encrypted Length UL = Unencrypted Length BS = Block Size In my instance, the u...
I have a serialized object which needs to be sent as an encrypted XML string. I am able to save the serialized object to a well-formed XML file, but this is not what I want. I have already got Rijndael encrypt/decrypt working for a sample string. Person person = new Person("Irish", "Chieftain"); XmlSerializer xmlSerializer = new XmlSeri...
I am trying to figure out how to make public/private keys that are AES encrypted. I'd like to be able to use it like so: byte[] BytesToEncrypt = { 0x01, 0x02, 0x03, 0x04, 0x05 }; byte[] PublicKey; byte[] PrivateKey; byte[] EncryptedBytes; byte[] UnencryptedBytes; PrivateKey = CreatePrivateKey(); PublicKey = CreatePublicKey(PrivateKey);...
I use the following code to initialize encryption... Dim symmetricKey As New System.Security.Cryptography.RijndaelManaged() With symmetricKey .Key = Encoding.ASCII.GetBytes(Key) .IV = Encoding.ASCII.GetBytes(IV) .Mode = CipherMode.CBC .BlockSize = 128 .KeySize = 128 .Padding = PaddingMode.PKCS7 End With The requi...