fixes #201 TLS configuration should support files for certificates and keys

This adds support for configuration of TLS websockets using the files
for keys, certificates, and CRLs.  Significant changes to the websocket,
TLS, and HTTP layers were made here.  We now expect TLS configuration to
be tied to the HTTP layer, and the HTTP code creates default configuration
objects based on the URL supplied.  (HTTP dialers and listeners are now
created with a URL rather than a sockaddr, giving them access to the scheme
as well.)

We fixed several bugs affecting TLS validation, and added a test suite
that confirms that validation works as it should.  We also fixed an orphaned
socket during HTTP negotiation, responsible for an occasional assertion
error if the http handshake does not complete successfully.  Finally several
use-after-free races were closed.

TLS layer changes include reporting of handshake failures using newly
created "standard" error codes for peer authentication and cryptographic
failures.

The use of the '*' wild card in URLs at bind time is no longer supported
for websocket at least.

Documentation updates for all this are in place as well.

1 files changed, 22 insertions, 2 deletions

diff --git a/src/nng.c b/src/nng.c
index 67eac2c4..509bb333 100644
--- a/src/nng.c
+++ b/src/nng.c
@@ -1,6 +1,6 @@
 //
-// Copyright 2017 Garrett D'Amore <garrett@damore.org>
-// Copyright 2017 Capitar IT Group BV <info@capitar.com>
+// Copyright 2018 Staysail Systems, Inc. <info@staysail.tech>
+// Copyright 2018 Capitar IT Group BV <info@capitar.com>
 //
 // This software is supplied under the terms of the MIT License, a
 // copy of which should be located in the distribution where this
@@ -411,6 +411,12 @@ nng_dialer_setopt_ptr(nng_dialer id, const char *name, void *val)
 }
 
 int
+nng_dialer_setopt_string(nng_dialer id, const char *name, const char *val)
+{
+	return (nng_dialer_setopt(id, name, val, strlen(val) + 1));
+}
+
+int
 nng_dialer_getopt(nng_dialer id, const char *name, void *val, size_t *szp)
 {
 	return (nng_ep_getopt(id, name, val, szp, NNI_EP_MODE_DIAL));
@@ -489,6 +495,12 @@ nng_listener_setopt_ptr(nng_listener id, const char *name, void *val)
 }
 
 int
+nng_listener_setopt_string(nng_listener id, const char *name, const char *val)
+{
+	return (nng_listener_setopt(id, name, val, strlen(val) + 1));
+}
+
+int
 nng_listener_getopt(nng_listener id, const char *name, void *val, size_t *szp)
 {
 	return (nng_ep_getopt(id, name, val, szp, NNI_EP_MODE_LISTEN));
@@ -620,6 +632,12 @@ nng_setopt_ptr(nng_socket sid, const char *name, void *val)
 }
 
 int
+nng_setopt_string(nng_socket sid, const char *name, const char *val)
+{
+	return (nng_setopt(sid, name, val, strlen(val) + 1));
+}
+
+int
 nng_getopt_int(nng_socket sid, const char *name, int *valp)
 {
 	size_t sz = sizeof(*valp);
@@ -714,6 +732,8 @@ static const struct {
 	{ NNG_EEXIST, "Resource already exists" },
 	{ NNG_EREADONLY, "Read only resource" },
 	{ NNG_EWRITEONLY, "Write only resource" },
+	{ NNG_ECRYPTO, "Cryptographic error" },
+	{ NNG_EPEERAUTH, "Peer could not be authenticated" },
 	{ NNG_EINTERNAL, "Internal error detected" },
 	{ 0, NULL },
 	// clang-format on