Bluetooth: crypto: Refactor a few items

After merging #51809, a few things were spotted that needed tweaking.
Among them:

- Rename the folder from bt_crypto to crypto, since the prefix is
  unnecesary
- Remove the include folder
- Remove the path from the global include paths

Signed-off-by: Carles Cufi <carles.cufi@nordicsemi.no>

subsys/bluetooth/CMakeLists.txt

@@ -10,7 +10,7 @@ add_subdirectory_ifdef(CONFIG_BT_SHELL shell)
 add_subdirectory_ifdef(CONFIG_BT_CONN services)
 add_subdirectory_ifdef(CONFIG_BT_MESH mesh)
 add_subdirectory_ifdef(CONFIG_BT_AUDIO audio)
-add_subdirectory_ifdef(CONFIG_BT_CRYPTO bt_crypto)
+add_subdirectory_ifdef(CONFIG_BT_CRYPTO crypto)
 
 if(CONFIG_BT_CTLR AND CONFIG_BT_LL_SW_SPLIT)
   add_subdirectory(controller)

subsys/bluetooth/Kconfig

@@ -186,7 +186,7 @@ rsource "common/Kconfig"
 rsource "host/Kconfig"
 rsource "controller/Kconfig"
 rsource "shell/Kconfig"
-rsource "bt_crypto/Kconfig"
+rsource "crypto/Kconfig"
 
 endif # BT_HCI
 

subsys/bluetooth/crypto/CMakeLists.txt

@@ -2,6 +2,4 @@
 
 zephyr_library()
 
-zephyr_include_directories(include)
-
 zephyr_library_sources(bt_crypto.c)

subsys/bluetooth/crypto/bt_crypto.c

@@ -7,15 +7,16 @@
 
 #include <zephyr/sys/byteorder.h>
 
-#include <bt_crypto.h>
 #include <tinycrypt/cmac_mode.h>
 #include <tinycrypt/constants.h>
 
 #define BT_DBG_ENABLED	IS_ENABLED(CONFIG_BT_DEBUG_CRYPTO)
-#define LOG_MODULE_NAME bt_crypto_toolbox
+#define LOG_MODULE_NAME bt_crypto
 #include "common/bt_str.h"
 #include "common/log.h"
 
+#include "bt_crypto.h"
+
 int bt_crypto_aes_cmac(const uint8_t *key, const uint8_t *in, size_t len, uint8_t *out)
 {
 	struct tc_aes_key_sched_struct sched;

subsys/bluetooth/crypto/bt_crypto.h

@@ -2,6 +2,9 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
+#ifndef __BT_CRYPTO_H
+#define __BT_CRYPTO_H
+
 #include <stddef.h>
 #include <stdint.h>
 
@@ -143,3 +146,5 @@ int bt_crypto_h7(const uint8_t salt[16], const uint8_t w[16], uint8_t res[16]);
  */
 int bt_crypto_h8(const uint8_t k[16], const uint8_t s[16], const uint8_t key_id[4],
 		 uint8_t res[16]);
+
+#endif /* __BT_CRYPTO_H */

subsys/bluetooth/host/crypto.c

@@ -23,7 +23,7 @@
 #include <tinycrypt/utils.h>
 
 #define BT_DBG_ENABLED IS_ENABLED(CONFIG_BT_DEBUG_HCI_CORE)
-#define LOG_MODULE_NAME bt_crypto
+#define LOG_MODULE_NAME bt_host_crypto
 #include "common/log.h"
 #include "common/bt_str.h"
 

subsys/bluetooth/host/smp.c

@@ -26,13 +26,14 @@
 #include <zephyr/sys/byteorder.h>
 #include <zephyr/sys/util.h>
 
-#include <bt_crypto.h>
 
 #define BT_DBG_ENABLED	IS_ENABLED(CONFIG_BT_DEBUG_SMP)
 #define LOG_MODULE_NAME bt_smp
 #include "common/log.h"
 #include "common/bt_str.h"
 
+#include "crypto/bt_crypto.h"
+
 #include "hci_core.h"
 #include "ecc.h"
 #include "keys.h"

tests/bluetooth/bt_crypto/CMakeLists.txt

@@ -4,6 +4,8 @@ cmake_minimum_required(VERSION 3.20.0)
 find_package(Zephyr REQUIRED HINTS $ENV{ZEPHYR_BASE})
 project(app)
 
+target_include_directories(app PRIVATE ${ZEPHYR_BASE}/subsys/bluetooth/crypto)
+
 target_sources(app PRIVATE
   src/test_bt_crypto.c
 )

tests/bluetooth/bt_crypto/src/test_bt_crypto.c

@@ -8,8 +8,7 @@
 #include <string.h>
 
 #include <zephyr/ztest.h>
-
-#include <bt_crypto.h>
+#include "bt_crypto.h"
 
 ZTEST_SUITE(bt_crypto, NULL, NULL, NULL, NULL, NULL);