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// 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 "SequenceUpdate_fp.h"
//
//
// Error Returns Meaning
//
// TPM_RC_MODE sequenceHandle does not reference a hash or HMAC sequence
// object
//
TPM_RC
TPM2_SequenceUpdate(
SequenceUpdate_In *in // IN: input parameter list
)
{
OBJECT *object;
// Input Validation
// Get sequence object pointer
object = ObjectGet(in->sequenceHandle);
// Check that referenced object is a sequence object.
if(!ObjectIsSequence(object))
return TPM_RC_MODE + RC_SequenceUpdate_sequenceHandle;
// Internal Data Update
if(object->attributes.eventSeq == SET)
{
// Update event sequence object
UINT32 i;
HASH_OBJECT *hashObject = (HASH_OBJECT *)object;
for(i = 0; i < HASH_COUNT; i++)
{
// Update sequence object
CryptUpdateDigest2B(&hashObject->state.hashState[i], &in->buffer.b);
}
}
else
{
HASH_OBJECT *hashObject = (HASH_OBJECT *)object;
// Update hash/HMAC sequence object
if(hashObject->attributes.hashSeq == SET)
{
// Is this the first block of the sequence
if(hashObject->attributes.firstBlock == CLEAR)
{
// If so, indicate that first block was received
hashObject->attributes.firstBlock = SET;
// Check the first block to see if the first block can contain
// the TPM_GENERATED_VALUE. If it does, it is not safe for
// a ticket.
if(TicketIsSafe(&in->buffer.b))
hashObject->attributes.ticketSafe = SET;
}
// Update sequence object hash/HMAC stack
CryptUpdateDigest2B(&hashObject->state.hashState[0], &in->buffer.b);
}
else if(object->attributes.hmacSeq == SET)
{
HASH_OBJECT *hashObject = (HASH_OBJECT *)object;
// Update sequence object hash/HMAC stack
CryptUpdateDigest2B(&hashObject->state.hmacState, &in->buffer.b);
}
}
return TPM_RC_SUCCESS;
}
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