Re: connecting to (openssl-) server in SSL or clear text

2013-11-20 Thread Darryl Miles
Salz, Rich wrote: The common practice is for clients to connect in the clear, then issue a command to turn on TLS, such as the SMTP STARTTLS command. It is only common practice for a small number of well known protocols. This doesn't mean it is the best solution. If you have a bespoke

Re: connecting to (openssl-) server in SSL or clear text

2013-11-18 Thread Matthias Apitz
El día Saturday, November 16, 2013 a las 08:36:33PM -0500, Dave Thompson escribió: I was thinking more in a solution where the client reads the first 8 bytes from the socket and checks if the beginning of the GoodMorning message is there in clear text (like 220 SLNP) and if not it should

RE: connecting to (openssl-) server in SSL or clear text

2013-11-16 Thread Dave Thompson
From: owner-openssl-users On Behalf Of Matthias Apitz Sent: Friday, November 15, 2013 14:43 El día Friday, November 15, 2013 a las 12:58:40PM -0500, Watson, Patrick escribió: Traditionally, there are 2 methods that immediately come to mind. One way is to have the SSL version of the

connecting to (openssl-) server in SSL or clear text

2013-11-15 Thread Matthias Apitz
Hello, We have application servers, written in C, which can be configured to do SSL or not. In any case they send out a goodmorning message, ciphered with SSL or in clear text if they run configured in clear text. What would be the best method for a C-written client to figure out if the server

RE: connecting to (openssl-) server in SSL or clear text

2013-11-15 Thread Watson, Patrick
Traditionally, there are 2 methods that immediately come to mind. One way is to have the SSL version of the server listen on a different port than the plain text version. Alternatively, your protocol could include a STARTTLS like command that indicates that the system wants to communicate

RE: connecting to (openssl-) server in SSL or clear text

2013-11-15 Thread Salz, Rich
The common practice is for clients to connect in the clear, then issue a command to turn on TLS, such as the SMTP STARTTLS command. -- Principal Security Engineer Akamai Technology Cambridge, MA __ OpenSSL Project

Re: connecting to (openssl-) server in SSL or clear text

2013-11-15 Thread Matthias Apitz
El día Friday, November 15, 2013 a las 12:58:40PM -0500, Watson, Patrick escribió: Traditionally, there are 2 methods that immediately come to mind. One way is to have the SSL version of the server listen on a different port than the plain text version. Alternatively, your protocol could

RE: connecting to (openssl-) server in SSL or clear text

2013-11-15 Thread Salz, Rich
I was thinking more in a solution where the client reads the first 8 bytes from the socket and checks if the beginning of the GoodMorning message is there in clear text (like 220 SLNP) and if not it should handover this buffer and the socket fd for further SSL handshake... Is this