From: Kinsey Moore <kmoore@digium.com>
Date: Fri, 15 Mar 2013 13:37:07 +0000 (+0000)
Subject: tcptls: Prevent unsupported options from being set
X-Git-Tag: certified/11.2-cert1-rc2~8
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=269c40f002a936f9a3f6b03d247cbbaae6d6db6b;p=thirdparty%2Fasterisk.git

tcptls: Prevent unsupported options from being set

AMI, HTTP, and chan_sip all support TLS in some way, but none of them
support all the options that Asterisk's TLS core is capable of
interpreting. This prevents consumers of the TLS/SSL layer from setting
TLS/SSL options that they do not support.

This also gets tlsverifyclient closer to a working state by requesting
the client certificate when tlsverifyclient is set. Currently, there is
no consumer of main/tcptls.c in Asterisk that supports this feature and
so it can not be properly tested.

Review: https://reviewboard.asterisk.org/r/2370/
Reported-by: John Bigelow
Patch-by: Kinsey Moore
(closes issue AST-1093)
........

Merged revisions 383165 from http://svn.asterisk.org/svn/asterisk/branches/1.8
........

Merged revisions 383166 from http://svn.asterisk.org/svn/asterisk/branches/11


git-svn-id: https://origsvn.digium.com/svn/asterisk/certified/branches/11.2@383208 65c4cc65-6c06-0410-ace0-fbb531ad65f3
---

diff --git a/channels/chan_sip.c b/channels/chan_sip.c
index 8dd7304a74..9654f536ef 100644
--- a/channels/chan_sip.c
+++ b/channels/chan_sip.c
@@ -31217,8 +31217,11 @@ static int reload_config(enum channelreloadreason reason)
 			continue;
 		}
 
-		/* handle tls conf */
-		if (!ast_tls_read_conf(&default_tls_cfg, &sip_tls_desc, v->name, v->value)) {
+		/* handle tls conf, don't allow setting of tlsverifyclient as it isn't supported by chan_sip */
+		if (!strcasecmp(v->name, "tlsverifyclient")) {
+			ast_log(LOG_WARNING, "Ignoring unsupported option 'tlsverifyclient'\n");
+			continue;
+		} else if (!ast_tls_read_conf(&default_tls_cfg, &sip_tls_desc, v->name, v->value)) {
 			continue;
 		}
 
diff --git a/main/http.c b/main/http.c
index 0553e6b465..1fa919bfbe 100644
--- a/main/http.c
+++ b/main/http.c
@@ -1052,8 +1052,17 @@ static int __ast_http_load(int reload)
 		v = ast_variable_browse(cfg, "general");
 		for (; v; v = v->next) {
 
-			/* handle tls conf */
-			if (!ast_tls_read_conf(&http_tls_cfg, &https_desc, v->name, v->value)) {
+			/* read tls config options while preventing unsupported options from being set */
+			if (strcasecmp(v->name, "tlscafile")
+				&& strcasecmp(v->name, "tlscapath")
+				&& strcasecmp(v->name, "tlscadir")
+				&& strcasecmp(v->name, "tlsverifyclient")
+				&& strcasecmp(v->name, "tlsdontverifyserver")
+				&& strcasecmp(v->name, "tlsclientmethod")
+				&& strcasecmp(v->name, "sslclientmethod")
+				&& strcasecmp(v->name, "tlscipher")
+				&& strcasecmp(v->name, "sslcipher")
+				&& !ast_tls_read_conf(&http_tls_cfg, &https_desc, v->name, v->value)) {
 				continue;
 			}
 
diff --git a/main/manager.c b/main/manager.c
index 9f20a904bf..08e1331c81 100644
--- a/main/manager.c
+++ b/main/manager.c
@@ -7487,7 +7487,15 @@ static int __init_manager(int reload, int by_external_config)
 	for (var = ast_variable_browse(cfg, "general"); var; var = var->next) {
 		val = var->value;
 
-		if (!ast_tls_read_conf(&ami_tls_cfg, &amis_desc, var->name, val)) {
+		/* read tls config options while preventing unsupported options from being set */
+		if (strcasecmp(var->name, "tlscafile")
+			&& strcasecmp(var->name, "tlscapath")
+			&& strcasecmp(var->name, "tlscadir")
+			&& strcasecmp(var->name, "tlsverifyclient")
+			&& strcasecmp(var->name, "tlsdontverifyserver")
+			&& strcasecmp(var->name, "tlsclientmethod")
+			&& strcasecmp(var->name, "sslclientmethod")
+			&& !ast_tls_read_conf(&ami_tls_cfg, &amis_desc, var->name, val)) {
 			continue;
 		}
 
diff --git a/main/tcptls.c b/main/tcptls.c
index dffba1dcd3..2b48426385 100644
--- a/main/tcptls.c
+++ b/main/tcptls.c
@@ -373,6 +373,11 @@ static int __ssl_setup(struct ast_tls_config *cfg, int client)
 		cfg->enabled = 0;
 		return 0;
 	}
+
+	SSL_CTX_set_verify(cfg->ssl_ctx,
+		ast_test_flag(&cfg->flags, AST_SSL_VERIFY_CLIENT) ? SSL_VERIFY_PEER | SSL_VERIFY_FAIL_IF_NO_PEER_CERT : SSL_VERIFY_NONE,
+		NULL);
+
 	if (!ast_strlen_zero(cfg->certfile)) {
 		char *tmpprivate = ast_strlen_zero(cfg->pvtfile) ? cfg->certfile : cfg->pvtfile;
 		if (SSL_CTX_use_certificate_file(cfg->ssl_ctx, cfg->certfile, SSL_FILETYPE_PEM) == 0) {