1 /* Microsoft Reference Implementation for TPM 2.0
2 *
3 * The copyright in this software is being made available under the BSD License,
4 * included below. This software may be subject to other third party and
5 * contributor rights, including patent rights, and no such rights are granted
6 * under this license.
7 *
8 * Copyright (c) Microsoft Corporation
9 *
10 * All rights reserved.
11 *
12 * BSD License
13 *
14 * Redistribution and use in source and binary forms, with or without modification,
15 * are permitted provided that the following conditions are met:
16 *
17 * Redistributions of source code must retain the above copyright notice, this list
18 * of conditions and the following disclaimer.
19 *
20 * Redistributions in binary form must reproduce the above copyright notice, this
21 * list of conditions and the following disclaimer in the documentation and/or
22 * other materials provided with the distribution.
23 *
24 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ""AS IS""
25 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
27 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
28 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
29 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
30 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
31 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
32 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
33 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
34 */
35 #include "Tpm.h"
36 #include "SequenceUpdate_fp.h"
37
38 #if CC_SequenceUpdate // Conditional expansion of this file
39
40 /*(See part 3 specification)
41 // This function is used to add data to a sequence object.
42 */
43 // Return Type: TPM_RC
44 // TPM_RC_MODE 'sequenceHandle' does not reference a hash or HMAC
45 // sequence object
46 TPM_RC
TPM2_SequenceUpdate(SequenceUpdate_In * in)47 TPM2_SequenceUpdate(
48 SequenceUpdate_In *in // IN: input parameter list
49 )
50 {
51 OBJECT *object;
52 HASH_OBJECT *hashObject;
53
54 // Input Validation
55
56 // Get sequence object pointer
57 object = HandleToObject(in->sequenceHandle);
58 hashObject = (HASH_OBJECT *)object;
59
60 // Check that referenced object is a sequence object.
61 if(!ObjectIsSequence(object))
62 return TPM_RCS_MODE + RC_SequenceUpdate_sequenceHandle;
63
64 // Internal Data Update
65
66 if(object->attributes.eventSeq == SET)
67 {
68 // Update event sequence object
69 UINT32 i;
70 for(i = 0; i < HASH_COUNT; i++)
71 {
72 // Update sequence object
73 CryptDigestUpdate2B(&hashObject->state.hashState[i], &in->buffer.b);
74 }
75 }
76 else
77 {
78 // Update hash/HMAC sequence object
79 if(hashObject->attributes.hashSeq == SET)
80 {
81 // Is this the first block of the sequence
82 if(hashObject->attributes.firstBlock == CLEAR)
83 {
84 // If so, indicate that first block was received
85 hashObject->attributes.firstBlock = SET;
86
87 // Check the first block to see if the first block can contain
88 // the TPM_GENERATED_VALUE. If it does, it is not safe for
89 // a ticket.
90 if(TicketIsSafe(&in->buffer.b))
91 hashObject->attributes.ticketSafe = SET;
92 }
93 // Update sequence object hash/HMAC stack
94 CryptDigestUpdate2B(&hashObject->state.hashState[0], &in->buffer.b);
95 }
96 else if(object->attributes.hmacSeq == SET)
97 {
98 // Update sequence object HMAC stack
99 CryptDigestUpdate2B(&hashObject->state.hmacState.hashState,
100 &in->buffer.b);
101 }
102 }
103 return TPM_RC_SUCCESS;
104 }
105
106 #endif // CC_SequenceUpdate