// 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 "Hash_fp.h"

TPM_RC

TPM2_Hash(

   Hash_In         *in,            // IN: input parameter list

   Hash_Out        *out            // OUT: output parameter list

   )

{

   HASH_STATE         hashState;

// Command Output

   // Output hash

       // Start hash stack

   out->outHash.t.size = CryptStartHash(in->hashAlg, &hashState);

       // Adding hash data

   CryptUpdateDigest2B(&hashState, &in->data.b);

       // Complete hash

   CryptCompleteHash2B(&hashState, &out->outHash.b);

   // Output ticket

   out->validation.tag = TPM_ST_HASHCHECK;

   out->validation.hierarchy = in->hierarchy;

   if(in->hierarchy == TPM_RH_NULL)

   {

       // Ticket is not required

       out->validation.hierarchy = TPM_RH_NULL;

       out->validation.digest.t.size = 0;

   }

   else if( in->data.t.size >= sizeof(TPM_GENERATED)

           && !TicketIsSafe(&in->data.b))

   {

       // Ticket is not safe

       out->validation.hierarchy = TPM_RH_NULL;

       out->validation.digest.t.size = 0;

   }

   else

   {

       // Compute ticket

       TicketComputeHashCheck(in->hierarchy, in->hashAlg,

                              &out->outHash, &out->validation);

   }

   return TPM_RC_SUCCESS;

}