Null reference exception while decrypting stream to stream

[virouzrx]

I've been trying to encrypt and decrypt files in memory using streams, but there is a null reference exception on

DecryptAsync(Stream inputStream, Stream outputStream, Stream privateKeyStream, string passPhrase)

method.

My code:

1. Key generating:

   public static void CinchooPGP_GenerateKeys()
   {
   using (ChoPGPEncryptDecrypt pgp = new ChoPGPEncryptDecrypt())
   {
       pgp.GenerateKey(@"C:\TEMP\Keys\public.asc", @"C:\TEMP\Keys\private.asc", null, "password");
   }
   }

2. Encryption:

       public static async Task<MemoryStream> CinchooPGPEncryption()
       {
           var ContentToEncryptStream = await FileToStreamMethod(@"C:\TEMP\Content\content.txt");
           var PublicKeyStream = await FileToStreamMethod(@"C:\TEMP\Keys\public.asc");
           MemoryStream encryptedContent = new MemoryStream();
           using (ChoPGPEncryptDecrypt pgp = new ChoPGPEncryptDecrypt())
           {
               //this accepts 3 streams: stream to encrypt, stream to decrypt, public keys
               await pgp.EncryptAsync(ContentToEncryptStream, encryptedContent, PublicKeyStream);
           }
           return encryptedContent;
       }

3. Decryption:

       public static async Task<MemoryStream> CinchooPGPDecryption(MemoryStream encryptedContent, string passPhrase)
       {
           var PrivateKeyStream = await FileToStreamMethod(@"C:\TEMP\Keys\private.asc");
           MemoryStream decryptedContent = new MemoryStream();
   
           using (ChoPGPEncryptDecrypt pgp = new ChoPGPEncryptDecrypt())
           {
               await pgp.DecryptAsync(encryptedContent, decryptedContent, PrivateKeyStream, passPhrase); //exception is thrown here
           }
           return decryptedContent;
       }

   Stacktrace:

   at Cinchoo.PGP.ChoPGPEncryptDecrypt.Decrypt(Stream inputStream, Stream outputStream, Stream privateKeyStream, String passPhrase)
   at Cinchoo.PGP.ChoPGPEncryptDecrypt.<>c__DisplayClass47_0.<DecryptAsync>b__0()
   at System.Threading.Tasks.Task.InnerInvoke()
   at System.Threading.Tasks.Task.<>c.<.cctor>b__277_0(Object obj)
   at System.Threading.ExecutionContext.RunFromThreadPoolDispatchLoop(Thread threadPoolThread, ExecutionContext executionContext, ContextCallback callback, Object state)
   --- End of stack trace from previous location ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Threading.ExecutionContext.RunFromThreadPoolDispatchLoop(Thread threadPoolThread, ExecutionContext executionContext, ContextCallback callback, Object state)
   at System.Threading.Tasks.Task.ExecuteWithThreadLocal(Task& currentTaskSlot, Thread threadPoolThread)
   --- End of stack trace from previous location ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.GetResult()
   at Cinchoo.PGP.ChoPGPEncryptDecrypt.<DecryptAsync>d__47.MoveNext()
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.GetResult()

No stream is null while I was debugging the app, so I think it's thrown somewhere inside the lib. Or maybe I am doing something wrong?

[0n5000]

I had the same issue when decrypting. Make sure that you set the input stream's position to zero. ChoPgp doesn't do it.