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 "Unseal_fp.h"
37
38 #if CC_Unseal // Conditional expansion of this file
39
40 /*(See part 3 specification)
41 // return data in a sealed data blob
42 */
43 // Return Type: TPM_RC
44 // TPM_RC_ATTRIBUTES 'itemHandle' has wrong attributes
45 // TPM_RC_TYPE 'itemHandle' is not a KEYEDHASH data object
46 TPM_RC
TPM2_Unseal(Unseal_In * in,Unseal_Out * out)47 TPM2_Unseal(
48 Unseal_In *in,
49 Unseal_Out *out
50 )
51 {
52 OBJECT *object;
53 // Input Validation
54 // Get pointer to loaded object
55 object = HandleToObject(in->itemHandle);
56
57 // Input handle must be a data object
58 if(object->publicArea.type != TPM_ALG_KEYEDHASH)
59 return TPM_RCS_TYPE + RC_Unseal_itemHandle;
60 if(IS_ATTRIBUTE(object->publicArea.objectAttributes, TPMA_OBJECT, decrypt)
61 || IS_ATTRIBUTE(object->publicArea.objectAttributes, TPMA_OBJECT, sign)
62 || IS_ATTRIBUTE(object->publicArea.objectAttributes, TPMA_OBJECT, restricted))
63 return TPM_RCS_ATTRIBUTES + RC_Unseal_itemHandle;
64 // Command Output
65 // Copy data
66 out->outData = object->sensitive.sensitive.bits;
67 return TPM_RC_SUCCESS;
68 }
69
70 #endif // CC_Unseal