private static Ssl.SslErrorCode GetSslError(SafeSslHandle context, int result, out Exception?innerError)
{
ErrorInfo lastErrno = Sys.GetLastErrorInfo(); // cache it before we make more P/Invoke calls, just in case we need it
Ssl.SslErrorCode retVal = Ssl.SslGetError(context, result);
switch (retVal)
{
case Ssl.SslErrorCode.SSL_ERROR_SYSCALL:
// Some I/O error occurred
innerError =
Crypto.ErrPeekError() != 0 ? Crypto.CreateOpenSslCryptographicException() : // crypto error queue not empty
result == 0 ? new EndOfStreamException() : // end of file that violates protocol
result == -1 && lastErrno.Error != Error.SUCCESS ? new IOException(lastErrno.GetErrorMessage(), lastErrno.RawErrno) : // underlying I/O error
null; // no additional info available
break;
case Ssl.SslErrorCode.SSL_ERROR_SSL:
// OpenSSL failure occurred. The error queue contains more details, when building the exception the queue will be cleared.
innerError = Interop.Crypto.CreateOpenSslCryptographicException();
break;
default:
// No additional info available.
innerError = null;
break;
}
return(retVal);
}