Added a properties to check if board/platofrm supports encryption

cmaglie · giulcioffi · commit 9e7c93929fe1 · 2022-03-22T17:46:43.000+01:00
It also provides a way to change the keychain layout (if needed in the
future) but keep the backward compatiblity.
diff --git a/boards.txt b/boards.txt
@@ -81,6 +81,7 @@ envie_m7.build.header_size=0x20000
 envie_m7.build.alignment=32
 envie_m7.build.version=1.2.3+4
 envie_m7.menu.security.sien.build.postbuild.cmd="{tools.imgtool.path}/{tools.imgtool.cmd}" {tools.imgtool.build.pattern}
+envie_m7.menu.security.sien.build.keys.type=public_keys
 envie_m7.menu.security.sien.build.keys.keychain={runtime.hardware.path}/mbed/libraries/MCUboot/default_keys
 envie_m7.menu.security.sien.build.keys.sign_key=ecdsa-p256-signing-key.pem
 envie_m7.menu.security.sien.build.keys.encrypt_key=ecdsa-p256-encrypt-key.pem
