Refactor tls code to support ucspi-tls

 That includes:
 - new architecture: the tls binary is now a child of the app
instead of the other way around
 - the sbearssl_run engine now takes a post-handshake callback.
This allows s6-tlsc and s6-tlsd to only exec into the app when
the handshake succeeds (which was already the case with libressl).
 - new binaries s6-tlsc-io and s6-tlsd-io encapsulate the crypto
code; they init and run the engine, connecting to 4 already open
fds (stdin/stdout = network, argv[1] and argv[2] = local)
 - s6-tlsc is now a simple wrapper around s6-tlsc-io
 - s6-tlsd is now a simple wrapper around s6-tlsd-io
 - new binary: s6-ucspitlsd, which is also a wrapper around
s6-tlsd-io, but differently: the parent execs the app which should
be ucspi-tls-aware, the child waits for a command from the parent
and execs into s6-tlsd-io if it receives it.

1 files changed, 4 insertions, 0 deletions

diff --git a/.gitignore b/.gitignore
index 50104d3..beebb38 100644
--- a/.gitignore
+++ b/.gitignore
@@ -8,6 +8,7 @@
 /libsbearssl.so.xyzzy
 /libstls.a.xyzzy
 /libstls.so.xyzzy
+/libs6tls.a.xyzzy
 /minidentd
 /s6-clockadd
 /s6-clockview
@@ -29,4 +30,7 @@
 /s6-tlsclient
 /s6-tlsd
 /s6-tlsserver
+/s6-tlsc-io
+/s6-tlsd-io
+/s6-ucspitlsd
 /src/minidentd/mgetuid.c