/// <summary>
/// Create and verify publications file instance from stream and with given buffer size.
/// </summary>
/// <param name="stream">publications file stream</param>
/// <param name="bufferSize">buffer size</param>
/// <returns>publications file</returns>
public IPublicationsFile Create(Stream stream, int bufferSize)
{
if (stream == null)
{
throw new ArgumentNullException(nameof(stream));
}
Logger.Debug("Creating publications file.");
byte[] data = new byte[PublicationsFile.FileBeginningMagicBytes.Length];
int bytesRead = stream.Read(data, 0, data.Length);
if (bytesRead != PublicationsFile.FileBeginningMagicBytes.Length || !Util.IsArrayEqual(data, PublicationsFile.FileBeginningMagicBytes))
{
throw new PublicationsFileException("Publications file header is incorrect. Invalid publications file magic bytes.");
}
using (MemoryStream memoryStream = new MemoryStream())
{
byte[] buffer = new byte[bufferSize];
while ((bytesRead = stream.Read(buffer, 0, buffer.Length)) > 0)
{
memoryStream.Write(buffer, 0, bytesRead);
}
PublicationsFile publicationsFile = new PublicationsFile(new RawTag(0x0, false, false, memoryStream.ToArray()));
try
{
Verify(publicationsFile);
}
catch (PkiVerificationException e)
{
Logger.Warn("Publications file verification failed. {0}", e);
throw new PublicationsFileException("Publications file verification failed.", e);
}
Logger.Debug("Publications file created.");
return(publicationsFile);
}
}
private void Verify(PublicationsFile publicationsFile)
{
_pkiTrustProvider.Verify(publicationsFile.GetSignedBytes(), publicationsFile.GetSignatureValue());
}