Vadim Bendebury | 5679752 | 2015-05-20 10:32:25 -0700 | [diff] [blame] | 1 | // This file was extracted from the TCG Published |
| 2 | // Trusted Platform Module Library |
| 3 | // Part 3: Commands |
| 4 | // Family "2.0" |
| 5 | // Level 00 Revision 01.16 |
| 6 | // October 30, 2014 |
| 7 | |
| 8 | #include "InternalRoutines.h" |
| 9 | #include "SequenceUpdate_fp.h" |
| 10 | // |
| 11 | // |
| 12 | // Error Returns Meaning |
| 13 | // |
| 14 | // TPM_RC_MODE sequenceHandle does not reference a hash or HMAC sequence |
| 15 | // object |
| 16 | // |
| 17 | TPM_RC |
| 18 | TPM2_SequenceUpdate( |
| 19 | SequenceUpdate_In *in // IN: input parameter list |
| 20 | ) |
| 21 | { |
| 22 | OBJECT *object; |
| 23 | |
| 24 | // Input Validation |
| 25 | |
| 26 | // Get sequence object pointer |
| 27 | object = ObjectGet(in->sequenceHandle); |
| 28 | |
| 29 | // Check that referenced object is a sequence object. |
| 30 | if(!ObjectIsSequence(object)) |
| 31 | return TPM_RC_MODE + RC_SequenceUpdate_sequenceHandle; |
| 32 | |
| 33 | // Internal Data Update |
| 34 | |
| 35 | if(object->attributes.eventSeq == SET) |
| 36 | { |
| 37 | // Update event sequence object |
| 38 | UINT32 i; |
| 39 | HASH_OBJECT *hashObject = (HASH_OBJECT *)object; |
| 40 | for(i = 0; i < HASH_COUNT; i++) |
| 41 | { |
| 42 | // Update sequence object |
| 43 | CryptUpdateDigest2B(&hashObject->state.hashState[i], &in->buffer.b); |
| 44 | } |
| 45 | } |
| 46 | else |
| 47 | { |
| 48 | HASH_OBJECT *hashObject = (HASH_OBJECT *)object; |
| 49 | |
| 50 | // Update hash/HMAC sequence object |
| 51 | if(hashObject->attributes.hashSeq == SET) |
| 52 | { |
| 53 | // Is this the first block of the sequence |
| 54 | if(hashObject->attributes.firstBlock == CLEAR) |
| 55 | { |
| 56 | // If so, indicate that first block was received |
| 57 | hashObject->attributes.firstBlock = SET; |
| 58 | |
| 59 | // Check the first block to see if the first block can contain |
| 60 | // the TPM_GENERATED_VALUE. If it does, it is not safe for |
| 61 | // a ticket. |
| 62 | if(TicketIsSafe(&in->buffer.b)) |
| 63 | hashObject->attributes.ticketSafe = SET; |
| 64 | } |
| 65 | // Update sequence object hash/HMAC stack |
| 66 | CryptUpdateDigest2B(&hashObject->state.hashState[0], &in->buffer.b); |
| 67 | |
| 68 | } |
| 69 | else if(object->attributes.hmacSeq == SET) |
| 70 | { |
| 71 | HASH_OBJECT *hashObject = (HASH_OBJECT *)object; |
| 72 | |
| 73 | // Update sequence object hash/HMAC stack |
| 74 | CryptUpdateDigest2B(&hashObject->state.hmacState, &in->buffer.b); |
| 75 | } |
| 76 | } |
| 77 | |
| 78 | return TPM_RC_SUCCESS; |
| 79 | } |