Add keystore_put_key interface function for storing keys permanently

Signed-off-by: Jukka Laitinen <jukkax@ssrc.tii.ae>

platforms/common/include/px4_platform_common/crypto_backend.h

@@ -71,6 +71,15 @@ void keystore_close(keystore_session_handle_t *handle);
  */
 size_t keystore_get_key(keystore_session_handle_t handle, uint8_t idx, uint8_t *key_buf, size_t key_buf_size);
 
+/*
+ * Store a key persistently into the keystore
+ * idx: key index in keystore
+ * key: pointer to the key
+ * key_size: size of the key
+ */
+bool keystore_put_key(keystore_session_handle_t handle, uint8_t idx, uint8_t *key, size_t key_size);
+
+
 /*
  * Architecture specific PX4 Crypto API functions
  */

platforms/common/px4_sw_crypto/stub_keystore/stub_keystore.c

@@ -77,3 +77,8 @@ size_t keystore_get_key(keystore_session_handle_t handle, uint8_t idx, uint8_t *
 
 	return ret;
 }
+
+bool keystore_put_key(keystore_session_handle_t handle, uint8_t idx, uint8_t *key, size_t key_size)
+{
+	return false;
+}