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, 68 insertions, 0 deletions

diff --git a/PolicyCpHash.c b/PolicyCpHash.c
new file mode 100644
index 0000000..7dee3a3
--- /dev/null
+++ b/PolicyCpHash.c
@@ -0,0 +1,68 @@
+// 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 "PolicyCpHash_fp.h"
+//
+//
+//     Error Returns                     Meaning
+//
+//     TPM_RC_CPHASH                     cpHash of policySession has previously been set to a different value
+//     TPM_RC_SIZE                       cpHashA is not the size of a digest produced by the hash algorithm
+//                                       associated with policySession
+//
+TPM_RC
+TPM2_PolicyCpHash(
+   PolicyCpHash_In       *in                   // IN: input parameter list
+   )
+{
+   SESSION      *session;
+   TPM_CC       commandCode = TPM_CC_PolicyCpHash;
+   HASH_STATE   hashState;
+
+// Input Validation
+
+   // Get pointer to the session structure
+   session = SessionGet(in->policySession);
+
+   // A new cpHash is given in input parameter, but cpHash in session context
+   // is not empty, or is not the same as the new cpHash
+   if(    in->cpHashA.t.size != 0
+       && session->u1.cpHash.t.size != 0
+       && !Memory2BEqual(&in->cpHashA.b, &session->u1.cpHash.b)
+      )
+       return TPM_RC_CPHASH;
+
+   // A valid cpHash must have the same size as session hash digest
+   if(in->cpHashA.t.size != CryptGetHashDigestSize(session->authHashAlg))
+       return TPM_RC_SIZE + RC_PolicyCpHash_cpHashA;
+
+// Internal Data Update
+
+   // Update policy hash
+   // policyDigestnew = hash(policyDigestold || TPM_CC_PolicyCpHash || cpHashA)
+   // Start hash
+   CryptStartHash(session->authHashAlg, &hashState);
+
+   // add old digest
+   CryptUpdateDigest2B(&hashState, &session->u2.policyDigest.b);
+
+   // add commandCode
+   CryptUpdateDigestInt(&hashState, sizeof(TPM_CC), &commandCode);
+
+   // add cpHashA
+   CryptUpdateDigest2B(&hashState, &in->cpHashA.b);
+
+   // complete the digest and get the results
+   CryptCompleteHash2B(&hashState, &session->u2.policyDigest.b);
+
+   // update cpHash in session context
+   session->u1.cpHash = in->cpHashA;
+   session->attributes.iscpHashDefined = SET;
+
+   return TPM_RC_SUCCESS;
+}