AU: Start checkpointing update progress.
Checkpoint the manifest metadata size and the update
check response hash in the preference store. Also checkpoint
the next operation and data offset.
Add methods for getting/setting hash context.
BUG=7390,7394
TEST=unit tests
Change-Id: I25291bf598ac9b0f1033e11cfe59df45b1f6eeab
Review URL: http://codereview.chromium.org/3521016
diff --git a/omaha_hash_calculator.h b/omaha_hash_calculator.h
index 52ac1b7..7aa37e4 100644
--- a/omaha_hash_calculator.h
+++ b/omaha_hash_calculator.h
@@ -11,11 +11,11 @@
#include "base/basictypes.h"
#include "base/logging.h"
-// Omaha uses base64 encoded SHA-1 as the hash. This class provides a simple
+// Omaha uses base64 encoded SHA-256 as the hash. This class provides a simple
// wrapper around OpenSSL providing such a formatted hash of data passed in.
-// The methods of this class must be called in a very specific order:
-// First the ctor (of course), then 0 or more calls to Update(), then
-// Finalize(), then 0 or more calls to hash().
+// The methods of this class must be called in a very specific order: First the
+// ctor (of course), then 0 or more calls to Update(), then Finalize(), then 0
+// or more calls to hash().
namespace chromeos_update_engine {
@@ -45,6 +45,15 @@
return raw_hash_;
}
+ // Gets the current hash context. Note that the string will contain binary
+ // data (including \0 characters).
+ std::string GetContext() const;
+
+ // Sets the current hash context. |context| must the string returned by a
+ // previous OmahaHashCalculator::GetContext method call. Returns true on
+ // success, and false otherwise.
+ bool SetContext(const std::string& context);
+
static bool RawHashOfData(const std::vector<char>& data,
std::vector<char>* out_hash);