I am having a problem using the signedCMS.decode routine. See the code below.

The error seems to occur when the file size is too big in this case 11MB.

private static void RemoveZfoSignature(string zfoFileName)
{
    byte[] fileContents = File.ReadAllBytes(zfoFileName);
    var contentInfo = new ContentInfo(fileContents);
    var signedCms = new SignedCms(contentInfo);

    // This line throws the error 100% of the time
    signedCms.Decode(fileContents);

    signedCms.RemoveSignature(0);
    byte[] outfile = signedCms.ContentInfo.Content;
    string outFileName = zfoFileName.Replace(".zfo", "_tmp.zfo");
    File.WriteAllBytes(outFileName, outfile);
}

Here is the exact error:

"System.Security.Cryptography.CryptographicException: ASN1 out of memory.

   at System.Security.Cryptography.Pkcs.SignedCms.OpenToDecode(Byte[] encodedMessage, ContentInfo contentInfo, Boolean detached)
   at System.Security.Cryptography.Pkcs.SignedCms.Decode(Byte[] encodedMessage)
   at ConsoleApplication2.Program.RemoveZfoSignature(String zfoFileName) in C:\\Users\\\\Documents\\Visual Studio 2008\\Projects\\ConsoleApplication2\\ConsoleApplication2\\Program.cs:line 30"

Any idea on how to fix this?