X-Git-Url: http://review.tizen.org/git/?a=blobdiff_plain;f=src%2Fmanager%2Fcrypto%2Ftz-backend%2Ftz-context.cpp;h=3cf57021fb6677cb6ad70ec7e77abfcb9ce95a98;hb=f746ffb6c1aba2d28630466ed014278cf4c946e2;hp=1359258bc40eca755de2912d2391f8dc93ba216a;hpb=b43f739a1f13d98004ffa73f5f151f772ca9dce2;p=platform%2Fcore%2Fsecurity%2Fkey-manager.git

diff --git a/src/manager/crypto/tz-backend/tz-context.cpp b/src/manager/crypto/tz-backend/tz-context.cpp
index 1359258..3cf5702 100644
--- a/src/manager/crypto/tz-backend/tz-context.cpp
+++ b/src/manager/crypto/tz-backend/tz-context.cpp
@@ -50,6 +50,9 @@ namespace {
 // whatever TA will return us.
 const uint32_t CIPHER_EXTRA_PADDING_SIZE = 16;
 
+// Maximum size of GCM tag in bytes.
+const size_t MAX_GCM_TAG_SIZE = 16;
+
 // Identifier of our TA
 const TEEC_UUID KEY_MANAGER_TA_UUID = KM_TA_UUID;
 
@@ -547,7 +550,7 @@ RawBuffer TrustZoneContext::finalizeGcmCipher(uint32_t opId,
 	sIn.Serialize(inMemory);
 
 	TZSerializer sOut;
-	sOut.Push(new TZSerializableBinary(data.size()));
+	sOut.Push(new TZSerializableBinary(MAX_GCM_TAG_SIZE, false));
 	TrustZoneMemory outMemory(m_Context, sOut.GetSize(), TEEC_MEM_OUTPUT);
 
 	TEEC_Operation op = makeOp(TEEC_VALUE_INOUT, inMemory, outMemory);