Split payload metadata logic from DeltaPerformer into its own class.
DeltaPerformer have code for both parsing payload and performing
operations. This change moves parsing payload header and validating
metadata signature to a new class PayloadMetadata so that
DeltaPerformer can focus on performing.
We will also have new code in another class that will use the new
PayloadMetadata class to parse payload metadata.
Bug: 65283633
Test: update_engine_unittests
Change-Id: Ie20b84713a0c66867a1de9d3d0cc29d0189b3c97
diff --git a/payload_consumer/payload_constants.h b/payload_consumer/payload_constants.h
index 1e2e810..b3bd5e7 100644
--- a/payload_consumer/payload_constants.h
+++ b/payload_consumer/payload_constants.h
@@ -46,6 +46,9 @@
// The minor version that allows PUFFDIFF operation.
extern const uint32_t kPuffdiffMinorPayloadVersion;
+// The maximum size of the payload header (anything before the protobuf).
+extern const uint64_t kMaxPayloadHeaderSize;
+
// The kernel and rootfs partition names used by the BootControlInterface when
// handling update payloads with a major version 1. The names of the updated
// partitions are include in the payload itself for major version 2.