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<span style="font-size: 10pt"><a href="/plan9/">Plan 9 from Bell Labs</a>&rsquo;s /usr/web/sources/contrib/maht/tlspipeclient.c</span></p>
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Copyright © 2009 Alcatel-Lucent.<br />
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#include &lt;u.h&gt;
#include &lt;libc.h&gt;
#include &lt;mp.h&gt;
#include &lt;libsec.h&gt;

/*
this is just tlsclient bodged to accept data from pipes, if you use it on HTTP it waits until the server closes the connection.
*/

void
usage(void)
{
       fprint(2, "usage: tlspipeclient [-t /sys/lib/tls/xxx] [-x /sys/lib/tls/xxx.exclude] dialstring\n");
       exits("usage");
}

void
xfer(int from, int to)
{
       char buf[12*1024];
       int n;

       while((n = read(from, buf, sizeof buf)) &gt; 0)
               if(write(to, buf, n) &lt; 0)
                       break;
}

void
main(int argc, char **argv)
{
       int fd, netfd;
       uchar digest[20];
       TLSconn conn;
       char *addr, *file, *filex;
       Thumbprint *thumb;

       file = nil;
       filex = nil;
       thumb = nil;
       ARGBEGIN{
       case 't':
               file = EARGF(usage());
               break;
       case 'x':
               filex = EARGF(usage());
               break;
       default:
               usage();
       }ARGEND

       if(argc != 1)
               usage();

       if(filex &amp;&amp; !file)
               sysfatal("specifying -x without -t is useless");
       if(file){
               thumb = initThumbprints(file, filex);
               if(thumb == nil)
                       sysfatal("initThumbprints: %r");
       }

       addr = argv[0];
       if((netfd = dial(addr, 0, 0, 0)) &lt; 0)
               sysfatal("dial %s: %r", addr);

       memset(&amp;conn, 0, sizeof conn);
       fd = tlsClient(netfd, &amp;conn);
       if(fd &lt; 0)
               sysfatal("tlsclient: %r");
       if(thumb){
               if(conn.cert==nil || conn.certlen&lt;=0)
                       sysfatal("server did not provide TLS certificate");
               sha1(conn.cert, conn.certlen, digest, nil);
               if(!okThumbprint(digest, thumb)){
                       fmtinstall('H', encodefmt);
                       sysfatal("server certificate %.*H not recognized", SHA1dlen, digest);
               }
       }
       free(conn.cert);
       close(netfd);

       switch(rfork(RFPROC)){
       case -1:
               fprint(2, "%s: fork: %r\n", argv0);
               exits("dial");
       case 0:
               xfer(0, fd);
               break;
       default:
               xfer(fd, 1);
               break;
       }
       exits(0);
}

# 8c tlspipeclient.c &amp;&amp; 8l tlspipeclient.8 &amp;&amp; mv 8.out tlspipeclient
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