End of stream reached before the end of analysis.

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Hi,
i have to encrypt a Serializable Class (that i have written) into a Stream (that will become a file or a file on a ftp site) and the opposite (from a stream to a class).

this is the code i have written:

Code to encrypt:

Out = new System.IO.FileStream("[Removed path]", System.IO.FileMode.Create);
Rijndael Alg = Rijndael.Create(); 
Alg.IV = ASCIIEncoding.ASCII.GetBytes(K);
Alg.Key = ASCIIEncoding.ASCII.GetBytes(K);
Alg.Padding = PaddingMode.Zeros;
CryptoStream streamC = new CryptoStream(Out, Alg.CreateEncryptor(), CryptoStreamMode.Write);
Form.Serialize(streamC, InstanceOfMyClass);
streamC.FlushFinalBlock();
streamC.Close();
Out.Close();

Code to decrypt:

In = new System.IO.FileStream("[Removed path]", System.IO.FileMode.Open, FileAccess.ReadWrite);
Rijndael Alg = Rijndael.Create();
Alg.IV = ASCIIEncoding.ASCII.GetBytes(K); 
Alg.Key = ASCIIEncoding.ASCII.GetBytes(K); 
Alg.Padding = PaddingMode.Zeros;
byte[] sorg = new byte[(int)In.Length];
In.Read(sorg, 0, (int)In.Length);
MemoryStream tmp = new MemoryStream();
CryptoStream streamC = new CryptoStream(tmp, Alg.CreateDecryptor(), CryptoStreamMode.Write);
streamC.Write(sorg, 0, sorg.Length);
streamC.FlushFinalBlock(); 
MyClass d = (MyClass)Form.Deserialize(tmp);
tmp.Close(); In.Close();
return d;

The encryption goes well, but the decription, at the Deserialization (at the third last line) gives me the error "End of stream reached before the end of analysis.". I have struggled to find a solution, but nothing. What can i do??

Thanks in advance!

Posted 3-Dec-10 9:43am

LoreP21

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Henry Minute 3-Dec-10 17:46pm

I do not have a solution to your problem. However, you are to be congratulated, a search for "End of stream reached before the end of analysis" only gives two hits. Both of them point here.

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LoreP21 · Answer 1 · 2010-12-18T09:29:00

I answer myself:
I don't need to transfer bytes from the decrypted stream to a new stream, and then deserialize the new stream. It's enough to initialize the cryptostream in read mode and to deserialize from it:

In = new System.IO.FileStream("[Removed path]", System.IO.FileMode.Open, FileAccess.ReadWrite);
Rijndael Alg = Rijndael.Create();
Alg.IV = ASCIIEncoding.ASCII.GetBytes(K); 
Alg.Key = ASCIIEncoding.ASCII.GetBytes(K); 
Alg.Padding = PaddingMode.Zeros;
Alg.Mode = CipherMode.CBC;

CryptoStream streamC = new CryptoStream(In, Alg.CreateDecryptor(), CryptoStreamMode.Read);
MyClass d = (MyClass)Form.Deserialize(streamCifrato);
In.Close();
return d;