futility: updater: Support white label from VPD and --signature_id

For white label devices, we have to select and patch key files (root key
and vblock) by VPD (`whitelabel_tag` or `customization_id`). The white
label tag VPD will be processed and converted to a "signature ID" for
key selection.

To support that, updater has to fetch current (system) image if the
matched model is following white label (so we can read VPD from it).
For developers who want to load and use particular files, they can use
--signature_id to override VPD values.

BUG=chromium:875551
TEST=TEST=make futil; tests/futility/run_test_scripts.sh $(pwd)/build/futility
BRANCH=None

Change-Id: I3630bae28d1a8493b56d0e5efd29f3c61a470379
Signed-off-by: Hung-Te Lin <hungte@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/1278420

1 files changed, 14 insertions, 1 deletions

diff --git a/futility/updater.h b/futility/updater.h
index c1405663..ae6db16a 100644
--- a/futility/updater.h
+++ b/futility/updater.h
@@ -114,7 +114,7 @@ struct updater_config {
 struct updater_config_arguments {
 	char *image, *ec_image, *pd_image;
 	char *archive, *quirks, *mode;
-	char *programmer, *model;
+	char *programmer, *model, *signature_id;
 	char *emulation, *sys_props, *write_protection;
 	int is_factory, try_update, force_update, do_manifest;
 	int verbosity;
@@ -131,6 +131,7 @@ struct model_config {
 	char *image, *ec_image, *pd_image;
 	struct patch_config patches;
 	char *signature_id;
+	int is_white_label;
 };
 
 struct manifest {
@@ -324,4 +325,16 @@ int patch_image_by_model(
 const struct model_config *manifest_find_model(const struct manifest *manifest,
 					       const char *model_name);
 
+/*
+ * Applies white label information to an existing model configuration.
+ * Collects signature ID information from either parameter signature_id or
+ * image file (via VPD) and updates model.patches for key files.
+ * Returns 0 on success, otherwise failure.
+ */
+int model_apply_white_label(
+		struct model_config *model,
+		struct archive *archive,
+		const char *signature_id,
+		const char *image);
+
 #endif  /* VBOOT_REFERENCE_FUTILITY_UPDATER_H_ */