initial drop of phosphor-ipmi-blobs

This implements a majority of the OEM IPMI BLOBS protocol.  The only
piece missing from this is the timed expiration of sessions.

Change-Id: I82c9d17b625c94fc3340edcfabbbf1ffeb5ad7ac
Signed-off-by: Patrick Venture <venture@google.com>
diff --git a/test/crc_mock.hpp b/test/crc_mock.hpp
new file mode 100644
index 0000000..1562200
--- /dev/null
+++ b/test/crc_mock.hpp
@@ -0,0 +1,19 @@
+#pragma once
+
+#include "crc.hpp"
+
+#include <gmock/gmock.h>
+
+namespace blobs
+{
+
+class CrcMock : public CrcInterface
+{
+  public:
+    virtual ~CrcMock() = default;
+
+    MOCK_METHOD0(clear, void());
+    MOCK_METHOD2(compute, void(const uint8_t*, uint32_t));
+    MOCK_CONST_METHOD0(get, uint16_t());
+};
+} // namespace blobs