Ich versuchte Bytes zu entschlüsseln, aber ich habe Fehler "length of data to decrypt is invalid
" in line read = cryptoStream.Read(buffer, 0, len);
inputFile.lenght = 4256, len = 4256
AES Decrypting C#
Dies ist der Code
entschlüsseln byte[] salt = new byte[32];
FileStream fsCrypt = new FileStream(inputFile, FileMode.Open);
fsCrypt.Seek(fsCrypt.Length - 376, SeekOrigin.Begin);
fsCrypt.Read(salt, 0, salt.Length);
byte[] passwordBytes = Encoding.UTF8.GetBytes(password);
RijndaelManaged AES = new RijndaelManaged();
AES.KeySize = 256;
AES.BlockSize = 128;
var key = new Rfc2898DeriveBytes(passwordBytes, salt, 50000);
AES.Key = key.GetBytes(AES.KeySize/8);
AES.IV = key.GetBytes(AES.BlockSize/8);
AES.Padding = PaddingMode.PKCS7;
AES.Mode = CipherMode.CFB;
int read;
byte[] buffer = new byte[1048576];
List <byte> bytes = new List <byte>();
fsCrypt.Seek(0, SeekOrigin.Begin);
read = 1;
var len = Convert.ToInt32(fsCrypt.Length);
MemoryStream mem = new MemoryStream();
fsCrypt.CopyTo(mem);
mem.Position = 0;
using(CryptoStream cryptoStream = new CryptoStream(mem, AES.CreateDecryptor(), CryptoStreamMode.Read)) // CryptoStream cryptoStream = new CryptoStream(fsCrypt, AES.CreateDecryptor(), CryptoStreamMode.Read
{
//var buffer2 = new byte[len];
while ((read = cs.Read(buffer, 0, buffer.Length)) > 0) {
foreach(var m in buffer)
bytes.Add(m);
}
}
Can u mir helfen? Was ist das Problem in diesem Code?
nahm ich das Beispiel des AES encryption on large files
Wie ich verschlüsseln:
byte[] salt = GenerateRandomSalt();
//convert password string to byte arrray
byte[] passwordBytes = System.Text.Encoding.UTF8.GetBytes(password);
//Set Rijndael symmetric encryption algorithm 71 246
RijndaelManaged AES = new RijndaelManaged();
AES.KeySize = 256;
AES.BlockSize = 128;
AES.Padding = PaddingMode.PKCS7;
var key = new Rfc2898DeriveBytes(passwordBytes, salt, 50000);
AES.Key = key.GetBytes(AES.KeySize/8);
AES.IV = key.GetBytes(AES.BlockSize/8);
AES.Mode = CipherMode.CFB;
var kk = key.ToString();
FileStream fsIn = new FileStream(inputFile, FileMode.Open);
byte[] buffer = new byte[1048576];
int read = 0;
byte[] encrypted;
using(MemoryStream msEncrypt = new MemoryStream()) {
using(CryptoStream csEncrypt = new CryptoStream(msEncrypt, AES.CreateEncryptor(), CryptoStreamMode.Write)) {
fsIn.Seek(0, SeekOrigin.Begin);
while ((read = fsIn.Read(buffer, 0, buffer.Length)) > 0) {
csEncrypt.Write(buffer, 0, read);
}
encrypted = msEncrypt.ToArray();
}
}
fsIn.Seek(0, SeekOrigin.Begin);
fsIn.Write(encrypted, 0, encrypted.Length);
fsIn.Seek(fsIn.Length, SeekOrigin.Begin);
fsIn.Write(salt, 0, salt.Length);
Die Länge Ihrer Daten sind Entschlüsseln Sie ist falsch –
@JoePhillips i-Code hinzugefügt, wie i-Datei kodieren, kann u bitte – Lolidze