TPMCmd/tpm/src/command/HashHMAC/EventSequenceComplete.c

/* Microsoft Reference Implementation for TPM 2.0
 *
 *  The copyright in this software is being made available under the BSD License,
 *  included below. This software may be subject to other third party and
 *  contributor rights, including patent rights, and no such rights are granted
 *  under this license.
 *
 *  Copyright (c) Microsoft Corporation
 *
 *  All rights reserved.
 *
 *  BSD License
 *
 *  Redistribution and use in source and binary forms, with or without modification,
 *  are permitted provided that the following conditions are met:
 *
 *  Redistributions of source code must retain the above copyright notice, this list
 *  of conditions and the following disclaimer.
 *
 *  Redistributions in binary form must reproduce the above copyright notice, this
 *  list of conditions and the following disclaimer in the documentation and/or
 *  other materials provided with the distribution.
 *
 *  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ""AS IS""
 *  AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 *  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 *  DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
 *  ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 *  (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 *  LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
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 *  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 *  SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
#include "Tpm.h"
#include "EventSequenceComplete_fp.h"

#if CC_EventSequenceComplete  // Conditional expansion of this file

/*(See part 3 specification)
  Complete an event sequence and flush the object.
*/
//  Return Type: TPM_RC
//      TPM_RC_LOCALITY     PCR extension is not allowed at the current locality
//      TPM_RC_MODE         input handle is not a valid event sequence object
TPM_RC
TPM2_EventSequenceComplete(
    EventSequenceComplete_In    *in,            // IN: input parameter list
    EventSequenceComplete_Out   *out            // OUT: output parameter list
    )
{
    HASH_OBJECT         *hashObject;
    UINT32               i;
    TPM_ALG_ID           hashAlg;
// Input validation
    // get the event sequence object pointer
    hashObject = (HASH_OBJECT *)HandleToObject(in->sequenceHandle);

    // input handle must reference an event sequence object
    if(hashObject->attributes.eventSeq != SET)
        return TPM_RCS_MODE + RC_EventSequenceComplete_sequenceHandle;

    // see if a PCR extend is requested in call
    if(in->pcrHandle != TPM_RH_NULL)
    {
        // see if extend of the PCR is allowed at the locality of the command,
        if(!PCRIsExtendAllowed(in->pcrHandle))
            return TPM_RC_LOCALITY;
        // if an extend is going to take place, then check to see if there has
        // been an orderly shutdown. If so, and the selected PCR is one of the
        // state saved PCR, then the orderly state has to change. The orderly state
        // does not change for PCR that are not preserved.
        // NOTE: This doesn't just check for Shutdown(STATE) because the orderly
        // state will have to change if this is a state-saved PCR regardless
        // of the current state. This is because a subsequent Shutdown(STATE) will
        // check to see if there was an orderly shutdown and not do anything if
        // there was. So, this must indicate that a future Shutdown(STATE) has
        // something to do.
        if(PCRIsStateSaved(in->pcrHandle))
            RETURN_IF_ORDERLY;
    }
// Command Output
    out->results.count = 0;

    for(i = 0; i < HASH_COUNT; i++)
    {
        hashAlg = CryptHashGetAlgByIndex(i);
        // Update last piece of data
        CryptDigestUpdate2B(&hashObject->state.hashState[i], &in->buffer.b);
        // Complete hash
        out->results.digests[out->results.count].hashAlg = hashAlg;
        CryptHashEnd(&hashObject->state.hashState[i],
                     CryptHashGetDigestSize(hashAlg),
                     (BYTE *)&out->results.digests[out->results.count].digest);
     // Extend PCR
        if(in->pcrHandle != TPM_RH_NULL)
            PCRExtend(in->pcrHandle, hashAlg,
                      CryptHashGetDigestSize(hashAlg),
                      (BYTE *)&out->results.digests[out->results.count].digest);
        out->results.count++;
    }
// Internal Data Update
    // mark sequence object as evict so it will be flushed on the way out
    hashObject->attributes.evict = SET;

    return TPM_RC_SUCCESS;
}

#endif // CC_EventSequenceComplete