On Thu, Apr 17, 2014 at 12:48:11PM -0400, Jeffrey Walton wrote:
> > This would be the job of a buffering layer above the SSL connection.
> > In Postfix, for example, there is a buffering "vstream" layer above
> > SSL. Peeking at plaintext data without consuming it is a vstream
> > layer feature.
>
> SSL_peek? I'm not sure if its intended to be a public function,
> though. But it is used in s_client.
Generally the public SSL library interfaces have names that start
with "SSL_" (upper case) and the private interfaces have names that
start with "ssl_" (lower case), so likely SSL_peek() is a public
interface. Unfortunately, not all the public interfaces are documented
as such, so we are sometimes forced to guess.
In this case there are brief references to SSL_peek() in the
SSL_get_error(3) and ssl(3) manpages, so the evidence for a public
interface is stronger, though the function is not fully documented.
--
Viktor.
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