The application I inherited was used with relatively reasonable files that fit
entirely into available RAM so far, but it will have to decrypt the larger
files in the future.
I could overcome the immediate problem this creates - that there may not be
enough contiguous RAM for the content - using a custom MemoryStream class.
But the requirement is to avoid decrypted data being swapped out into the page
file, so I cannot use this approach as content may be larger than available RAM.
Currently the app is using the following code:
PgpObjectFactory plainFact = new
PgpObjectFactory(clearStream);
PgpObject message = plainFact.NextPgpObject();
if (message is PgpLiteralData)
{
PgpLiteralData literalData = null;
literalData = (PgpLiteralData)message;
MemoryStream decryptedStream = new MemoryStream();
literalData.GetInputStream().CopyTo(decryptedStream);
return decryptedStream;
}
And then the application will read line by line from the memory stream and
process data.
There will be a problem if the decrypted data does not fit entire into RAM.
I tried replacing this with straight returning of the input stream:
PgpObjectFactory plainFact = new
PgpObjectFactory(clearStream);
PgpObject message = plainFact.NextPgpObject();
if (message is PgpLiteralData)
{
PgpLiteralData literalData = null;
literalData = (PgpLiteralData)message;
return literalData.GetInputStream();
}
But when I tried creating a TextReader from that stream and calling
ReadToEnd(), the application threw an exception:
System.ObjectDisposedException: Cannot access a closed file.
How can I read string data line by line from the stream returned by
PgpLiteralData. GetInputStream()?
Thank you!
Alex
