samples: add descryptions for encryption types in mcuboot_config.temp…

…late.h

Signed-off-by: Raphael Dupont <raphael7dup@gmail.com>

samples/mcuboot_config/mcuboot_config.template.h

@@ -34,6 +34,32 @@
 /* #define MCUBOOT_SIGN_EC256 */
 
 
+/*
+ * Encryption types 
+ *
+ * You must choose one encryption type and provide a private key.
+ * 
+ * For examples, see :
+ * 
+ * boot/espressif/keys.c
+ * boot/zephyr/keys.c
+ */
+
+/* Uncomment to enable image encryption. */
+/* #define MCUBOOT_ENC_IMAGES */
+
+/* Uncomment for RSA encryption support. */
+/* #define MCUBOOT_ENCRYPT_RSA */
+
+/* Uncomment for ECIES-P256 encryption support. */
+/* #define MCUBOOT_ENCRYPT_EC256 */
+
+/* Uncomment for ECIES-X25519 encryption support. */
+/* #define MCUBOOT_ENCRYPT_X25519 */
+
+/* Uncomment for AES-128 Keywrap encryption support. */
+/* #define MCUBOOT_ENCRYPT_KW */
+
 /*
  * Upgrade mode
  *