From f26447c54ed5517215a4936ba10996bbe7862231 Mon Sep 17 00:00:00 2001
From: pokgak <m.aimanismail@gmail.com>
Date: Mon, 8 Apr 2019 21:20:35 +0200
Subject: [PATCH] examples/gcoap: use sock_dtls

---
 examples/gcoap/Makefile      | 14 ++++++++
 examples/gcoap/credentials.h | 70 ++++++++++++++++++++++++++++++++++++
 examples/gcoap/gcoap_cli.c   | 24 +++++++++++++
 3 files changed, 108 insertions(+)
 create mode 100644 examples/gcoap/credentials.h

diff --git a/examples/gcoap/Makefile b/examples/gcoap/Makefile
index 8bc265939378..bf1c66e10c30 100644
--- a/examples/gcoap/Makefile
+++ b/examples/gcoap/Makefile
@@ -34,6 +34,20 @@ USEMODULE += gcoap
 # Additional networking modules that can be dropped if not needed
 USEMODULE += gnrc_icmpv6_echo
 
+# Use tinydtls's sock_dtls
+USEMODULE += tinydtls_sock_dtls
+USEMODULE += sock_dtls 	# FIXME: why it doesnt see this?
+ifneq (,$(filter sock_dtls,$(USEMODULE)))
+  GCOAP_PORT = 5684
+  CFLAGS += -DGCOAP_PORT=$(GCOAP_PORT)
+  INCLUDES += -I$(CURDIR)
+  ifneq (,$(filter tinydtls,$(USEMODULE)))
+    # Log level for the tinydtls package
+    # Values: 0:EMERG (Default), 1:ALERT 2:CRIT 3:WARN 4:NOTICE 5:INFO 6:DEBUG
+    TINYDTLS_LOG ?= 6
+  endif
+endif
+
 # Required by gcoap example
 USEMODULE += od
 USEMODULE += fmt
diff --git a/examples/gcoap/credentials.h b/examples/gcoap/credentials.h
new file mode 100644
index 000000000000..415940cf7e7c
--- /dev/null
+++ b/examples/gcoap/credentials.h
@@ -0,0 +1,70 @@
+/*
+ * Copyright (C) 2018 Inria
+ *
+ * This file is subject to the terms and conditions of the GNU Lesser
+ * General Public License v2.1. See the file LICENSE in the top level
+ * directory for more details.
+ */
+
+/**
+ * @ingroup     tests
+ * @{
+ *
+ * @file
+ * @brief       tlsman test application (PSK and ECC keys)
+ *
+ * Small test for TLSMAN. Many definitions defined here are also available at
+ * sock_secure (and are intended to be used in standard applications)
+ *
+ * @author      Raul Fuentes <raul.fuentes-samaniego@inria.fr>
+ *
+ * @}
+ */
+
+#ifndef DTLS_CREDENTIALS_H
+#define DTLS_CREDENTIALS_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#ifdef MODULE_SOCK_DTLS
+#ifdef DTLS_PSK
+/**
+ * @brief Application specific PSK identity and key parameters
+ */
+static psk_params_t tdsec_psk_params[] = {
+    { .id = "RIOTer", .key = "LGPLisyourfriend", },
+};
+#endif /* DTLS_PSK */
+
+#ifdef DTLS_ECC
+static const unsigned char ecdsa_priv_key[] = {
+    0x41, 0xC1, 0xCB, 0x6B, 0x51, 0x24, 0x7A, 0x14,
+    0x43, 0x21, 0x43, 0x5B, 0x7A, 0x80, 0xE7, 0x14,
+    0x89, 0x6A, 0x33, 0xBB, 0xAD, 0x72, 0x94, 0xCA,
+    0x40, 0x14, 0x55, 0xA1, 0x94, 0xA9, 0x49, 0xFA
+};
+
+static const unsigned char ecdsa_pub_key_x[] = {
+    0x36, 0xDF, 0xE2, 0xC6, 0xF9, 0xF2, 0xED, 0x29,
+    0xDA, 0x0A, 0x9A, 0x8F, 0x62, 0x68, 0x4E, 0x91,
+    0x63, 0x75, 0xBA, 0x10, 0x30, 0x0C, 0x28, 0xC5,
+    0xE4, 0x7C, 0xFB, 0xF2, 0x5F, 0xA5, 0x8F, 0x52
+};
+
+static const unsigned char ecdsa_pub_key_y[] = {
+    0x71, 0xA0, 0xD4, 0xFC, 0xDE, 0x1A, 0xB8, 0x78,
+    0x5A, 0x3C, 0x78, 0x69, 0x35, 0xA7, 0xCF, 0xAB,
+    0xE9, 0x3F, 0x98, 0x72, 0x09, 0xDA, 0xED, 0x0B,
+    0x4F, 0xAB, 0xC3, 0x6F, 0xC7, 0x72, 0xF8, 0x29
+};
+#endif /* DTLS_ECC */
+#endif /* MODULE_SOCK_DTLS */
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* DTLS_CREDENTIALS_H */
+
diff --git a/examples/gcoap/gcoap_cli.c b/examples/gcoap/gcoap_cli.c
index 2e0caeb702d8..9a6a85425fd4 100644
--- a/examples/gcoap/gcoap_cli.c
+++ b/examples/gcoap/gcoap_cli.c
@@ -25,6 +25,11 @@
 #include "net/gcoap.h"
 #include "od.h"
 #include "fmt.h"
+#ifdef MODULE_SOCK_DTLS
+#include "net/tlsman.h"
+#include "credentials.h"
+#include "net/sock/dtls.h"
+#endif
 
 #define ENABLE_DEBUG (0)
 #include "debug.h"
@@ -33,6 +38,7 @@ static void _resp_handler(unsigned req_state, coap_pkt_t* pdu,
                           sock_udp_ep_t *remote);
 static ssize_t _stats_handler(coap_pkt_t* pdu, uint8_t *buf, size_t len, void *ctx);
 static ssize_t _riot_board_handler(coap_pkt_t* pdu, uint8_t *buf, size_t len, void *ctx);
+static int _get_psk_params(psk_params_t *psk);
 
 /* CoAP resources. Must be sorted by path (ASCII order). */
 static const coap_resource_t _resources[] = {
@@ -49,6 +55,23 @@ static gcoap_listener_t _listener = {
 /* Counts requests sent by CLI. */
 static uint16_t req_count = 0;
 
+static tlsman_handler_t credentials_handler = {
+    .get_psk_params = _get_psk_params,
+    .get_ecdsa_params = NULL,
+};
+
+static int _get_psk_params(psk_params_t *psk)
+{
+    psk->key = tdsec_psk_params[0].key;
+    psk->key_len = strlen(tdsec_psk_params[0].key);
+
+    psk->id = tdsec_psk_params[0].id;
+    psk->hint = NULL;
+    psk->id_len = strlen(tdsec_psk_params[0].id);
+    psk->hint_len = 0;
+    return 0;
+}
+
 /*
  * Response callback.
  */
@@ -312,5 +335,6 @@ int gcoap_cli_cmd(int argc, char **argv)
 
 void gcoap_cli_init(void)
 {
+    tlsman_set_credentials_handler(&credentials_handler);
     gcoap_register_listener(&_listener);
 }