Initial commit to seed TPM2.0 source code directory

LICENSE file text copied from TCG library specification. README
describes the procedure used to extract source code from parts 3 and 4
of the specification.

The python scripts and part{34}.txt files will be removed in the
following commits.

Change-Id: Ie281e6e988481831f33483053455e8aff8f3f75f
Signed-off-by: Vadim Bendebury <vbendeb@chromium.org>

1 files changed, 90 insertions, 0 deletions

diff --git a/NV_Extend.c b/NV_Extend.c
new file mode 100644
index 0000000..197bb1a
--- /dev/null
+++ b/NV_Extend.c
@@ -0,0 +1,90 @@
+// This file was extracted from the TCG Published
+// Trusted Platform Module Library
+// Part 3: Commands
+// Family "2.0"
+// Level 00 Revision 01.16
+// October 30, 2014
+
+#include "InternalRoutines.h"
+#include "NV_Extend_fp.h"
+#include "NV_spt_fp.h"
+//
+//
+//     Error Returns               Meaning
+//
+//     TPM_RC_ATTRIBUTES           the TPMA_NV_EXTEND attribute is not SET in the Index referenced
+//                                 by nvIndex
+//     TPM_RC_NV_AUTHORIZATION     the authorization was valid but the authorizing entity (authHandle) is
+//                                 not allowed to write to the Index referenced by nvIndex
+//     TPM_RC_NV_LOCKED            the Index referenced by nvIndex is locked for writing
+//
+TPM_RC
+TPM2_NV_Extend(
+   NV_Extend_In      *in            // IN: input parameter list
+   )
+{
+   TPM_RC                  result;
+   NV_INDEX                nvIndex;
+
+   TPM2B_DIGEST            oldDigest;
+   TPM2B_DIGEST            newDigest;
+   HASH_STATE              hashState;
+
+// Input Validation
+
+   // Common access checks, NvWriteAccessCheck() may return TPM_RC_NV_AUTHORIZATION
+   // or TPM_RC_NV_LOCKED
+   result = NvWriteAccessChecks(in->authHandle, in->nvIndex);
+   if(result != TPM_RC_SUCCESS)
+       return result;
+
+   // Get NV index info
+   NvGetIndexInfo(in->nvIndex, &nvIndex);
+
+   // Make sure that this is an extend index
+   if(nvIndex.publicArea.attributes.TPMA_NV_EXTEND != SET)
+       return TPM_RC_ATTRIBUTES + RC_NV_Extend_nvIndex;
+
+   // If the Index is not-orderly, or if this is the first write, NV will
+   // need to be updated.
+   if(   nvIndex.publicArea.attributes.TPMA_NV_ORDERLY == CLEAR
+      || nvIndex.publicArea.attributes.TPMA_NV_WRITTEN == CLEAR)
+   {
+       // Check if NV is available. NvIsAvailable may return TPM_RC_NV_UNAVAILABLE
+       // TPM_RC_NV_RATE or TPM_RC_SUCCESS.
+       result = NvIsAvailable();
+       if(result != TPM_RC_SUCCESS)
+           return result;
+   }
+
+// Internal Data Update
+
+   // Perform the write.
+   oldDigest.t.size = CryptGetHashDigestSize(nvIndex.publicArea.nameAlg);
+   pAssert(oldDigest.t.size <= sizeof(oldDigest.t.buffer));
+   if(nvIndex.publicArea.attributes.TPMA_NV_WRITTEN == SET)
+   {
+       NvGetIndexData(in->nvIndex, &nvIndex, 0,
+                      oldDigest.t.size, oldDigest.t.buffer);
+   }
+   else
+   {
+       MemorySet(oldDigest.t.buffer, 0, oldDigest.t.size);
+   }
+   // Start hash
+   newDigest.t.size = CryptStartHash(nvIndex.publicArea.nameAlg, &hashState);
+
+   // Adding old digest
+   CryptUpdateDigest2B(&hashState, &oldDigest.b);
+
+   // Adding new data
+   CryptUpdateDigest2B(&hashState, &in->data.b);
+
+   // Complete hash
+   CryptCompleteHash2B(&hashState, &newDigest.b);
+
+   // Write extended hash back.
+   // Note, this routine will SET the TPMA_NV_WRITTEN attribute if necessary
+   return NvWriteIndexData(in->nvIndex, &nvIndex, 0,
+                           newDigest.t.size, newDigest.t.buffer);
+}