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Question by
siddharth3322 · Oct 30, 2016 at 10:32 AM ·
pluginplayerprefsencryptioncryptography
System.Security.Cryptography.CryptographicException: Wrong Key Length
When I started using this plugin for encryption purpose:
Now after run, I was getting this exclamation message in console, so its not working as per my thinking.
This is source code for encryption and decryption.
static string Encrypt(string strPlain, string password)
{
if (!useSecure)
return strPlain;
try
{
DESCryptoServiceProvider des = new DESCryptoServiceProvider();
Rfc2898DeriveBytes rfc2898DeriveBytes = new Rfc2898DeriveBytes(password, GetIV(), Iterations);
byte[] key = rfc2898DeriveBytes.GetBytes(8);
using (var memoryStream = new MemoryStream())
using (var cryptoStream = new CryptoStream(memoryStream, des.CreateEncryptor(key, GetIV()), CryptoStreamMode.Write))
{
memoryStream.Write(GetIV(), 0, GetIV().Length);
byte[] plainTextBytes = Encoding.UTF8.GetBytes(strPlain);
cryptoStream.Write(plainTextBytes, 0, plainTextBytes.Length);
cryptoStream.FlushFinalBlock();
return Convert.ToBase64String(memoryStream.ToArray());
}
}
catch (Exception e)
{
Debug.LogWarning("Encrypt Exception: " + e);
return strPlain;
}
}
static string Decrypt(string strEncript, string password)
{
if (!useSecure)
return strEncript;
try
{
byte[] cipherBytes = Convert.FromBase64String(strEncript);
using (var memoryStream = new MemoryStream(cipherBytes))
{
DESCryptoServiceProvider des = new DESCryptoServiceProvider();
byte[] iv = GetIV();
memoryStream.Read(iv, 0, iv.Length);
// use derive bytes to generate key from password and IV
var rfc2898DeriveBytes = new Rfc2898DeriveBytes(password, iv, Iterations);
byte[] key = rfc2898DeriveBytes.GetBytes(8);
using (var cryptoStream = new CryptoStream(memoryStream, des.CreateDecryptor(key, iv), CryptoStreamMode.Read))
using (var streamReader = new StreamReader(cryptoStream))
{
string strPlain = streamReader.ReadToEnd();
return strPlain;
}
}
}
catch (Exception e)
{
Debug.LogWarning("Decrypt Exception: " + e);
return strEncript;
}
}
Please share your suggestion for this.
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