[Help-gnutls] Re: gnutls with pgp

[dellanna at csp.it]

Yes,
with cc -o ex-client1 ex-client1.c tcp.c -lgnutls it was generated the output "
ex-client1", but if I run ./ex-client1 the application return "Connect error".
I work on LAN and there is the server machine in waiting on port  5556. The
client machine should to connect on server machine with TLS.
The client application is complete?

Simone.

Scrive Simon Josefsson <simon at josefsson.org>:

> dellanna at csp.it writes:
>
> > Ok,
> > now, if I run  cc -ex-serv-anon ex-serv-anon.c -I/usr/lib/ -L /usr/lib/
> -lgnutls
> > (for server with anonymous authentication) it work correctly...the output
> is the
> > following:
> >
> > Server ready. Listening to port '5556'
> >
> > But if I run cc -ex-client1 ex-client1.c -I/usr/lib/ -L /usr/lib/ -lgnutls
> on
> > client machine (for client anonymous) it return the following error:
>
> Try:
>
> cc -o ex-client1 ex-client1.c -lgnutls
>
> instead.
>
> > _______________________________________________________________
> > /usr/bin/ld: warning: cannot find entry symbol x-client1; defaulting to
> > 0000000008048908
> > /tmp/ccbQ8aPE.o: In function `main':ex-client1.c:(.text+0x97): undefined
> > reference to `tcp_connect'
> > :ex-client1.c:(.text+0x1fd): undefined reference to `tcp_close'
> > collect2: ld returned 1 exit status
> > _______________________________________________________________
> >
> > What is the problem for you?
>
> The tcp_* functions are needed.  Download this file as tcp.c:
>
>
http://cvs.gnupg.org/cgi-bin/viewcvs.cgi/*checkout*/gnutls/doc/examples/tcp.c?root=GNU+TLS+Library&content-type=text%2Fplain
>
> and build it too, e.g.:
>
> cc -o ex-client1 ex-client1.c tcp.c -lgnutls
>
> I have added that file as another section in the manual.
>
> /Simon
>
> > Simone.
> >
> > Scrive Simon Josefsson <simon at josefsson.org>:
> >
> >> dellanna at csp.it writes:
> >>
> >> > Hi,
> >> > I installed gnutls with Synaptic Package Manager ( in ubuntu 6.06) and I
> >> don't
> >> > know what is gnutls library directory...
> >>
> >> Then it is installed in the default path, /usr/lib.  You don't have to
> >> specify the -I or -L parameters at all.  Just add "-lgnutls" when
> >> building it.
> >>
> >> > If I download gnutls from ftp://ftp.gnupg.org/gcrypt/alpha/gnutls/
> >> > what is the packet I need to use gnutls in my applications?
> >> > In manual there aren't instructions releted to configuration of my
> >> environment.
> >> > Can you help me, please?
> >>
> >> See the file INSTALL, but if GnuTLS comes with your distribution, you
> >> don't need to build it yourself.
> >>
> >> /Simon
> >>
> >> > Simone.
> >> >
> >> > Scrive Simon Josefsson <simon at josefsson.org>:
> >> >
> >> >> dellanna at csp.it writes:
> >> >>
> >> >> > Ok,
> >> >> > but if I try to compiler the example on manual "Echo Server with
> >> anonymous
> >> >> > authentication" with command gcc, it return something like:
> >> >> > "server.c:(.text+0x2e): undefined reference to
> >> >> `gnutls_set_default_priority'"
> >> >> > this function is in the package <gnutls/gnutls.h>.
> >> >> > In this example I write #include <gnutls/gnutls.h> . There is
> something
> >> to
> >> >> > configure before gnutls work correctly?
> >> >>
> >> >> Did you forget to link the program with the gnutls library?  You'll
> >> >> need to compile it using something like this:
> >> >>
> >> >> cc -o foo foo.c -I/path/to/gnutls/include -L/path/to/gnutls/lib
> -lgnutls
> >> >>
> >> >> Alternatively, if you built GnuTLS yourself, invoke 'make' in the
> >> >> doc/examples/ directory.  The examples are built when you build
> >> >> GnuTLS.
> >> >>
> >> >> /Simon
> >> >>
> >> >> > Simone.
> >> >> >
> >> >> > Scrive Simon Josefsson <simon at josefsson.org>:
> >> >> >
> >> >> >> dellanna at csp.it writes:
> >> >> >>
> >> >> >> > Hi all,
> >> >> >> > I should implement autenthication inside of web application with
> >> gnutls.
> >> >> >> > I should use OpenPGP inside TLS connection (I do not use
> certificate
> >> >> >> X.509).
> >> >> >> > It is possible in GnuTLS, but can someone indicate me any
> reference
> >> >> guide
> >> >> >> (with
> >> >> >> > example server-client)?
> >> >> >>
> >> >> >> Hi!  Yes, that should be possible.  There are example code for a
> >> >> >> server in the GnuTLS manual:
> >> >> >>
> >> >> >>
> >> >> >
> >> >>
> >> >
> >>
> >
>
http://www.gnu.org/software/gnutls/manual/html_node/Echo-Server-with-OpenPGP-authentication.html
> >> >> >>
> >> >> >> There are no explicit examples for OpenPGP clients, but modifying
> the
> >> >> >> standard X.509 example:
> >> >> >>
> >> >> >>
> >> >> >
> >> >>
> >> >
> >>
> >
>
http://www.gnu.org/software/gnutls/manual/html_node/Simple-client-example-with-X_002e509-certificate-support.html
> >> >> >>
> >> >> >> using the hints from:
> >> >> >>
> >> >> >>
> >> >> >
> >> >>
> >> >
> >>
> >
>
http://www.gnu.org/software/gnutls/manual/html_node/Certificate-authentication.html
> >> >> >>
> >> >> >> should not be impossible.
> >> >> >>
> >> >> >> Note that this part of GnuTLS is not widely used, so it isn't
> unlikely
> >> >> >> that you run into problems.  Let us know how it works for you!
> >> >> >>
> >> >> >> /Simon
> >> >> >>
> >> >> >>
> >> >> >
> >> >> >
> >> >> >
> >> >> >
> >> >> > ----------------------------------------------------------------
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> >> >>
> >> >>
> >> >
> >> >
> >> >
> >> >
> >> > ----------------------------------------------------------------
> >> > This message was sent using IMP, the Internet Messaging Program.
> >>
> >>
> >
> >
> >
> >
> > ----------------------------------------------------------------
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>




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