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authormarha <marha@users.sourceforge.net>2009-06-28 22:07:26 +0000
committermarha <marha@users.sourceforge.net>2009-06-28 22:07:26 +0000
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+easy_tls - generic SSL/TLS proxy
+========
+
+(... and example for non-blocking SSL/TLS I/O multiplexing.)
+
+
+ easy_tls.c, easy_tls.h:
+
+ Small generic SSL/TLS proxy library: With a few function calls,
+ an application socket will be replaced by a pipe handled by a
+ separate SSL/TLS proxy process. This allows easily adding
+ SSL/TLS support to many programs not originally designed for it.
+
+ [Actually easy_tls.c is not a proper library: Customization
+ requires defining preprocessor macros while compiling it.
+ This is quite confusing, so I'll probably change it.]
+
+ These files may be used under the OpenSSL license.
+
+
+
+ test.c, test.h, Makefile, cert.pem, cacerts.pem:
+
+ Rudimentary example program using the easy_tls library, and
+ example key and certificates for it. Usage examples:
+
+ $ ./test 8443 # create server listening at port 8443
+ $ ./test 127.0.0.1 8443 # create client, connect to port 8443
+ # at IP address 127.0.0.1
+
+ 'test' will not automatically do SSL/TLS, or even read or write
+ data -- it must be told to do so on input lines starting
+ with a command letter. 'W' means write a line, 'R' means
+ read a line, 'C' means close the connection, 'T' means
+ start an SSL/TLS proxy. E.g. (user input tagged with '*'):
+
+ * R
+ <<< 220 mail.example.net
+ * WSTARTTLS
+ >>> STARTTLS
+ * R
+ <<< 220 Ready to start TLS
+ * T
+ test_process_init(fd = 3, client_p = 1, apparg = (nil))
+ +++ `E:self signed certificate in certificate chain'
+ +++ `<... certificate info ...>'
+ * WHELO localhost
+ >>> HELO localhost
+ R
+ <<< 250 mail.example.net
+
+ You can even do SSL/TLS over SSL/TLS over SSL/TLS ... by using
+ 'T' multiple times. I have no idea why you would want to though.
+
+
+This code is rather old. When I find time I will update anything that
+should be changed, and improve code comments. To compile the sample
+program 'test' on platforms other then Linux or Solaris, you will have
+to edit the Makefile.
+
+As noted above, easy_tls.c will be changed to become a library one
+day, which means that future revisions will not be fully compatible to
+the current version.
+
+Bodo Möller <bodo@openssl.org>